CA2110589C - Spread spectrum wireless telephone system - Google Patents
Spread spectrum wireless telephone system Download PDFInfo
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- CA2110589C CA2110589C CA002110589A CA2110589A CA2110589C CA 2110589 C CA2110589 C CA 2110589C CA 002110589 A CA002110589 A CA 002110589A CA 2110589 A CA2110589 A CA 2110589A CA 2110589 C CA2110589 C CA 2110589C
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- Prior art keywords
- telephone network
- base station
- call
- station
- user
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- 238000001228 spectrum Methods 0.000 title claims abstract description 40
- 238000004891 communication Methods 0.000 claims abstract description 123
- 230000001413 cellular effect Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000000977 initiatory effect Effects 0.000 claims description 29
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000003190 augmentative effect Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 2
- 241000283986 Lepus Species 0.000 description 1
- 230000001668 ameliorated effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2618—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid code-time division multiple access [CDMA-TDMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/142—Reselecting a network or an air interface over the same radio air interface technology
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/16—WPBX [Wireless Private Branch Exchange]
Abstract
A system for accessing a telephone system (101) in which a set of user stations (102) are matched with a set of base stations (104) for connection to a telephone network (103). Each user station comprises a spread-spectrum transmitter (109) or receiver (108) and is capable of dynamic connection to selected base stations (104). User stations may use CDMA, FDMA, TDMA or other multiple-access techniques to obtain one or more clear communication paths to base stations. Base stations are coupled to each other by means of a private exchange telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another access path, such as narrowband or spread-spectrum cellular telephone circuits.
Description
DESCRIPTION
Spread Spectrum Wireless Telephone System Background of the Invention Field of the Invention This invention relates to a spread spectrum wireless telephone system.
Description of Related Art Access to telephone networks, may commonly occur via one of two general mechanisms, termed "private access" and "public access". As used herein, "private access" means access by means of dedicated circuits (and includes business telephones through PBX, Centrex, and key-type systems, and home telephones), while "public access" means access by means of common communication channels (and includes cellular telephones and payphones). Interconnection to a public switched telephone network (PSTN) for both private access and public access may make use of cable, fiber optic, wire, or radio frequency links, or other methods of communication known in the art. Many telephone networks, have a large number of telephones which are hardwired into the network and which have private access to the network from fixed locations.
One problem which has arisen in the art is the desire of mobile persons to have convenient and inexpensive access to telephone networks. These persons generally have a choice between locating a private-access business or home telephone, or a public-access payphone, which can be inconvenient, and using cellular telephone service, which can be expensive.
Accordingly, it would be advantageous to provide a relatively convenient and inexpensive system which allows public access to telephone networks.
Moreover, public access to telephone networks is subject to a number of problems, due in part to the public nature of the communication channel. Such communication may be subject to eavesdropping and other security risks, and may also be subject to unpredictable loss, noise, interference, and even active jamming. Many of these problems are ameliorated by spread-spectrum radio communication, in which transmitted signals are spread across a bandwidth which is wider than the bandwidth of the signal. Spread-spectrum communication may also be used in conjunction with CDMA, FDMA, TDMA, and other multiplexing techniques, and thus may offer advantages in a switching network.
One method of public access to telephone networks is shown in U.S. Patent 4,878,238. While the system shown therein may achieve the goal of public access to a telephone network, it is subject to the drawback that it is not able to achieve the advantages of spread-spectrum communication. Moreover, the system shown therein has little or no ability to handoff user stations from one base station to another when conditions warrant. It would be advantageous to allow public access to the telephone network with relatively inexpensive user stations and which achieve this and other advantages of spread-spectrum communication.
Some aspects of the art of spread spectrum wireless communication are shown in U.S. Patents 5,016,255 (issued May 14, 1991), 5,022,047 (issued June 4, 1991), 5,402,413 and 5,455,822.
Spread Spectrum Wireless Telephone System Background of the Invention Field of the Invention This invention relates to a spread spectrum wireless telephone system.
Description of Related Art Access to telephone networks, may commonly occur via one of two general mechanisms, termed "private access" and "public access". As used herein, "private access" means access by means of dedicated circuits (and includes business telephones through PBX, Centrex, and key-type systems, and home telephones), while "public access" means access by means of common communication channels (and includes cellular telephones and payphones). Interconnection to a public switched telephone network (PSTN) for both private access and public access may make use of cable, fiber optic, wire, or radio frequency links, or other methods of communication known in the art. Many telephone networks, have a large number of telephones which are hardwired into the network and which have private access to the network from fixed locations.
One problem which has arisen in the art is the desire of mobile persons to have convenient and inexpensive access to telephone networks. These persons generally have a choice between locating a private-access business or home telephone, or a public-access payphone, which can be inconvenient, and using cellular telephone service, which can be expensive.
Accordingly, it would be advantageous to provide a relatively convenient and inexpensive system which allows public access to telephone networks.
Moreover, public access to telephone networks is subject to a number of problems, due in part to the public nature of the communication channel. Such communication may be subject to eavesdropping and other security risks, and may also be subject to unpredictable loss, noise, interference, and even active jamming. Many of these problems are ameliorated by spread-spectrum radio communication, in which transmitted signals are spread across a bandwidth which is wider than the bandwidth of the signal. Spread-spectrum communication may also be used in conjunction with CDMA, FDMA, TDMA, and other multiplexing techniques, and thus may offer advantages in a switching network.
One method of public access to telephone networks is shown in U.S. Patent 4,878,238. While the system shown therein may achieve the goal of public access to a telephone network, it is subject to the drawback that it is not able to achieve the advantages of spread-spectrum communication. Moreover, the system shown therein has little or no ability to handoff user stations from one base station to another when conditions warrant. It would be advantageous to allow public access to the telephone network with relatively inexpensive user stations and which achieve this and other advantages of spread-spectrum communication.
Some aspects of the art of spread spectrum wireless communication are shown in U.S. Patents 5,016,255 (issued May 14, 1991), 5,022,047 (issued June 4, 1991), 5,402,413 and 5,455,822.
Another aspect of the problem of access to telephone networks is the desire for mobile persons to be able to contact each other, for example, when these persons are closely located. Access by each such person to a telephone network would allow for them to contact each other, but it might place excess burden on the telephone network and might result in unwarranted delays in making such contacts. Accordingly, it would be advantageous to provide a relatively convenient and inexpensive system which allows contact between multiple user stations which have access (either private or public) to telephone networks.
One method of wireless contact between a plurality of user stations is shown in U.S. Patent 4,672,658. While the system shown therein may achieve the goal of operating a wireless PBX, it is subject to the drawback that it may require complex and relatively expensive user stations, and may not be smoothly integrated into a system for access to telephone networks. Accordingly, it would be advantageous to provide private exchange telephone systems (including PBX, Centrex, or key-type systems) which can be smoothly integrated in a system for providing access (either private or public) to telephone networks with relatively inexpensive user stations.
Another development in the art of telephone networks is the "intelligent network", used herein to mean a telephone network in which enhanced telephone network services are performed by an independent processor, rather than by a local switch or a local switching processor. In an intelligent network, a telephone caller can communicate directly with the independent processor, for controlling y1~10589 enhanced telephone network features. Examples of these enhanced features are call routing and call screening.
Some of these enhanced features are useful for rerouting messages from one telephone to another, while others are useful for caching messages while a person is' not available at a particular telephone. Both of these purposes are quite suited to mobile persons who frequently access telephone networks. Moreover, enhanced features add to the value of having a telephone and thus encourage l0 mobile persons to use mobile telephones. Accordingly, it would be advantageous if enhanced features were available to mobile telephones.
SummaEly of the Invention, The invention provides a system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Hase stations may be coupled directly or indirectly to the telephone network and may be capable of initiating or receiving calls on the telephone network.
User stations may be.mobile, may comprise a spread-spectrum transmitter or receiver and may be capable~of dynamic connection to selected base stations.v A plurality of base stations'may be coupled to a private exchange telephone:>,system for coupling user stations in calls outside, the telephone network.
In embodiments of the invention, user stations may use CDMA,FDMA, TDMA or other multiple-access techniques to obtain~one.or more clear communication paths tovbase stations. Base stations may be placed at convenient locations or may themselves be mobile. User stations may make and break connections with base stations as the user station moves between service regions, or is otherwise more advantageously serviced by, base stations. User stations may direct requests to and receive information from an enhanced telephone services processor, so as to obtain enhanced telephone services within the telephone . WO 92/22156 PCT/US92/04478 ~110~59 network. Base stations may be coupled to each other by means of a private exchange telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls 5 outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another access path, such as narrowband or spread-spectrum cellular telephone circuits.
brief Description of the Drawir~,cLs The figure shows a wireless communication system coupled to a telephone network.
Hescr~ption of the Preferred Embodiment The figure shows a wireless communication system coupled to a telephone network.
A wireless communication system 101 for communication between a user station 102 and a telephone network 103 includes a base station 104, which is coupled to the telephone network 103 by means of a telephone link 105.
The base stations 104 each generally comprise a base 2o station receiver 106 and a base station transmitter 107, and the user stations 102 each generally comprise a user stations receiver 108 and a user station transmitter 109 (althoughwsome base stations 104 or some user stations 102 may be receive-only or transmit-only, e.g. for emergency signals or locationing information), and may be coupled by a spread-spectrum communication link 110.
In a preferred embodiment, the telephone link 105 may comprise a private access link, such as cable, fiber optics,, or wire, or a laser or microwave link. However, the telephone link 105 may alternatively comprise a public access link, such as a radio channel, a cellular telephone link, or other means. Moreover, the telephone link 105 may alternatively comprise an indirect communication link, such as by means of a switching processor or a different telephone network. It would be clear to one of ordinary skill in the art, after perusal of the specification, drawings and claims herein, that all of these alternative techniques, as well as other and further techniques, would be workable, and are within the scope and spirit of the invention.
The communication link 110 between base stations 104 and user stations 102 may make use of known spread-spectrum techniques, such as those disclosed in patents and applications incorporated by reference herein. These generally provide for distinguishing the base stations 104 and the user stations 102 with logical identifiers such as frequency bands, spread-spectrum codes, timeslots, or station identifiers. The base stations 104 and the user stations 102 may operate on a plurality of spread-spectrum codes, thus performing CDMA, on a plurality of (possibly overlapping) frequency bands, thus performing FDMA, on a plurality of timeslots, thus performing TDMA, with a plurality of station identifiers to be included in messages, or with other multiplexing techniques.
Locations near base stations 104 may generally define a set of cells 111, as in a cellular system. However, there is no particular requirement that the cells 111 will form a convenient repeating pattern or that they will be of uniform size or traffic density. In fact, base stations 104 may be placed at convenient locations, or may themselves be mobile.
If the cells 111 local to base stations 104 overlap, such as when base stations 104 are closely located or when base stations 104 are mobile, techniques for allocating logical identifiers (such as frequency bands, spread-spectrum codes, timeslots, or station identifiers), between base stations 104 and user stations 102, within and among cells 111, may use 6a methods such as those disclosed in patents mentioned previously herein. In a preferred embodiment, base stations 104 may have logical identifiers allocated by a N~.~.4~~9 control station 112 coupled to the telephone network 103 or to a base station 104.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise handoff of user stations 102 from an old base station 104 to a new base station 104. A user station 102 may be handed-off from one base station 104 to another for one of several reasons. For example, the user station 102 may have moved, or may have better radio contact with the new base station 104, such as if the radio environment changes.
For example,' a large object may move between the user station 102 and the old base station 104). Alternatively, if base stations 104 are located in different parts of the telephone network 103 or controlled by different oversight hardware, such as different area code or telephone exchange, it may be advantageous to handoff a user station 102 from one base station 104 to another for the purpose of using a new area code or telephone exchange.
If handoff occurs while a call on the telephone network 103 is in progress, the old base station 104 or the new base station 104 will direct the telephone network 103 to reroute the call to use the new base station 104, by a message to a rerouting processor 113. The rerouting processor 113 could be a cluster controller 114 for directly controlling a set of base stations 104, a private exchange telephone system 115 such as a PBX, Centrex, or key-type system (or the cluster controller 114 and the private exchange telephone system 115 operating in conjunction), a local switch, a local switching processor, or the control station 112.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise protocol for initiating communication between base stations 104 and user stations 102 like that disclosed in patents and applications incorporated by reference herein. After a base station 104 and a user station 102 initiate communication, the user station 102 may communicate with a distant telephone 116 (which is not necessarily physically distant) on the telephone network 103 by initiating or receiving calls.
In a preferred embodiment, a user station 102 may initiate a call by initiating communication with a base station 104 and directing that base station 104 to initiate a call in the telephone network 103. The base station 104 may direct the telephone network 103 to initiate the call and to make a connection to the distant telephone 116. Communication between the user station 102 and the distant telephone 116 may be coupled from the user station 102 to the base station 104 to the telephone network 103 to the distant telephone 116, and on the reverse path.
Similarly, a user station 102 may receive a call by the base station 104 initiating communication with the user station 102 and directing the user station 102 to receive the call. The base station 104 may receive the call and make the connection from the distant telephone 116. Communication between the distant telephone 116 and the user station 102 may be coupled from the distant telephone 116 to the telephone network 103 to the base station 104 to the user station 102, and on the reverse path.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise CDMA, FDMA, TDMA, and other multiplexing techniques for communication between base stations 104 and user stations 102 without interference, and may also comprise allocation of frequencies, spread-spectrum codes and other communication resources in a region by the control station 112 such as those techniques disclosed in patents mentioned previously herein.
One method of wireless contact between a plurality of user stations is shown in U.S. Patent 4,672,658. While the system shown therein may achieve the goal of operating a wireless PBX, it is subject to the drawback that it may require complex and relatively expensive user stations, and may not be smoothly integrated into a system for access to telephone networks. Accordingly, it would be advantageous to provide private exchange telephone systems (including PBX, Centrex, or key-type systems) which can be smoothly integrated in a system for providing access (either private or public) to telephone networks with relatively inexpensive user stations.
Another development in the art of telephone networks is the "intelligent network", used herein to mean a telephone network in which enhanced telephone network services are performed by an independent processor, rather than by a local switch or a local switching processor. In an intelligent network, a telephone caller can communicate directly with the independent processor, for controlling y1~10589 enhanced telephone network features. Examples of these enhanced features are call routing and call screening.
Some of these enhanced features are useful for rerouting messages from one telephone to another, while others are useful for caching messages while a person is' not available at a particular telephone. Both of these purposes are quite suited to mobile persons who frequently access telephone networks. Moreover, enhanced features add to the value of having a telephone and thus encourage l0 mobile persons to use mobile telephones. Accordingly, it would be advantageous if enhanced features were available to mobile telephones.
SummaEly of the Invention, The invention provides a system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Hase stations may be coupled directly or indirectly to the telephone network and may be capable of initiating or receiving calls on the telephone network.
User stations may be.mobile, may comprise a spread-spectrum transmitter or receiver and may be capable~of dynamic connection to selected base stations.v A plurality of base stations'may be coupled to a private exchange telephone:>,system for coupling user stations in calls outside, the telephone network.
In embodiments of the invention, user stations may use CDMA,FDMA, TDMA or other multiple-access techniques to obtain~one.or more clear communication paths tovbase stations. Base stations may be placed at convenient locations or may themselves be mobile. User stations may make and break connections with base stations as the user station moves between service regions, or is otherwise more advantageously serviced by, base stations. User stations may direct requests to and receive information from an enhanced telephone services processor, so as to obtain enhanced telephone services within the telephone . WO 92/22156 PCT/US92/04478 ~110~59 network. Base stations may be coupled to each other by means of a private exchange telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls 5 outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another access path, such as narrowband or spread-spectrum cellular telephone circuits.
brief Description of the Drawir~,cLs The figure shows a wireless communication system coupled to a telephone network.
Hescr~ption of the Preferred Embodiment The figure shows a wireless communication system coupled to a telephone network.
A wireless communication system 101 for communication between a user station 102 and a telephone network 103 includes a base station 104, which is coupled to the telephone network 103 by means of a telephone link 105.
The base stations 104 each generally comprise a base 2o station receiver 106 and a base station transmitter 107, and the user stations 102 each generally comprise a user stations receiver 108 and a user station transmitter 109 (althoughwsome base stations 104 or some user stations 102 may be receive-only or transmit-only, e.g. for emergency signals or locationing information), and may be coupled by a spread-spectrum communication link 110.
In a preferred embodiment, the telephone link 105 may comprise a private access link, such as cable, fiber optics,, or wire, or a laser or microwave link. However, the telephone link 105 may alternatively comprise a public access link, such as a radio channel, a cellular telephone link, or other means. Moreover, the telephone link 105 may alternatively comprise an indirect communication link, such as by means of a switching processor or a different telephone network. It would be clear to one of ordinary skill in the art, after perusal of the specification, drawings and claims herein, that all of these alternative techniques, as well as other and further techniques, would be workable, and are within the scope and spirit of the invention.
The communication link 110 between base stations 104 and user stations 102 may make use of known spread-spectrum techniques, such as those disclosed in patents and applications incorporated by reference herein. These generally provide for distinguishing the base stations 104 and the user stations 102 with logical identifiers such as frequency bands, spread-spectrum codes, timeslots, or station identifiers. The base stations 104 and the user stations 102 may operate on a plurality of spread-spectrum codes, thus performing CDMA, on a plurality of (possibly overlapping) frequency bands, thus performing FDMA, on a plurality of timeslots, thus performing TDMA, with a plurality of station identifiers to be included in messages, or with other multiplexing techniques.
Locations near base stations 104 may generally define a set of cells 111, as in a cellular system. However, there is no particular requirement that the cells 111 will form a convenient repeating pattern or that they will be of uniform size or traffic density. In fact, base stations 104 may be placed at convenient locations, or may themselves be mobile.
If the cells 111 local to base stations 104 overlap, such as when base stations 104 are closely located or when base stations 104 are mobile, techniques for allocating logical identifiers (such as frequency bands, spread-spectrum codes, timeslots, or station identifiers), between base stations 104 and user stations 102, within and among cells 111, may use 6a methods such as those disclosed in patents mentioned previously herein. In a preferred embodiment, base stations 104 may have logical identifiers allocated by a N~.~.4~~9 control station 112 coupled to the telephone network 103 or to a base station 104.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise handoff of user stations 102 from an old base station 104 to a new base station 104. A user station 102 may be handed-off from one base station 104 to another for one of several reasons. For example, the user station 102 may have moved, or may have better radio contact with the new base station 104, such as if the radio environment changes.
For example,' a large object may move between the user station 102 and the old base station 104). Alternatively, if base stations 104 are located in different parts of the telephone network 103 or controlled by different oversight hardware, such as different area code or telephone exchange, it may be advantageous to handoff a user station 102 from one base station 104 to another for the purpose of using a new area code or telephone exchange.
If handoff occurs while a call on the telephone network 103 is in progress, the old base station 104 or the new base station 104 will direct the telephone network 103 to reroute the call to use the new base station 104, by a message to a rerouting processor 113. The rerouting processor 113 could be a cluster controller 114 for directly controlling a set of base stations 104, a private exchange telephone system 115 such as a PBX, Centrex, or key-type system (or the cluster controller 114 and the private exchange telephone system 115 operating in conjunction), a local switch, a local switching processor, or the control station 112.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise protocol for initiating communication between base stations 104 and user stations 102 like that disclosed in patents and applications incorporated by reference herein. After a base station 104 and a user station 102 initiate communication, the user station 102 may communicate with a distant telephone 116 (which is not necessarily physically distant) on the telephone network 103 by initiating or receiving calls.
In a preferred embodiment, a user station 102 may initiate a call by initiating communication with a base station 104 and directing that base station 104 to initiate a call in the telephone network 103. The base station 104 may direct the telephone network 103 to initiate the call and to make a connection to the distant telephone 116. Communication between the user station 102 and the distant telephone 116 may be coupled from the user station 102 to the base station 104 to the telephone network 103 to the distant telephone 116, and on the reverse path.
Similarly, a user station 102 may receive a call by the base station 104 initiating communication with the user station 102 and directing the user station 102 to receive the call. The base station 104 may receive the call and make the connection from the distant telephone 116. Communication between the distant telephone 116 and the user station 102 may be coupled from the distant telephone 116 to the telephone network 103 to the base station 104 to the user station 102, and on the reverse path.
Spread-spectrum communication between base stations 104 and user stations 102 may comprise CDMA, FDMA, TDMA, and other multiplexing techniques for communication between base stations 104 and user stations 102 without interference, and may also comprise allocation of frequencies, spread-spectrum codes and other communication resources in a region by the control station 112 such as those techniques disclosed in patents mentioned previously herein.
User stations 102 may also be coupled to the telephone network 103 by an independent access path 117, such as by cellular wireless telephone communication using a cellular base station 118. In a preferred embodiment, user stations 102 may have multiple communication channels (e. g., multiple codes, frequencies, or timeslots), and thus be capable of coupling to a plurality of different base stations 104. An augmented base station 119 may additionally perform the function of the cellular base station 118 in a cellular wireless telephone network, so that a user station 102 which can make an independent access path to the augmented base station 119 may have direct access to the telephone network 103 like a cellular telephone.
An enhanced-services processor 120 coupled to the telephone network 103 may provide enhanced telephone services within the telephone network 103, as is well known in the art.
After a base station 104 and a user station 102 initiate communication, the user station 102 may communicate with the enhanced-services processor 120 by initiating or receiving messages between the user station 102 and the enhanced-services processor 120, so as to obtain enhanced telephone services within the telephone network 103 just as if the user station 102 was an ordinary telephone on the telephone network 103.
Other and further details on the nature and operation of enhanced-services processors (also known as "intelligent network" processors or adjunct network processors) may be found in "ADVANCED INTELLIGENT NETWORK RELEASE 1 PROPOSAL" (Issued l, November, 1989), Document No. SR-NPL-001509; "ADVANCED
9a INTELLIGENT NETWORK RELEASE 1 BASELINE ARCHITECTURE" (Issued 1, March 1990), Document No. SR-NPL-001555; "AMERITECH PUBLIC
TELEPHONE MESSAGE DELIVERY SERVICE INTERFACE SPECIFICATIONS"
(Issued 1, November, 1989), Document No. AM-TR-MKT-000046;
"INTELLIVIEW NETWORK MANAGEMENT SERVICE TERMINAL INTERFACE
SPECIFICATION, BELL ATLANTIC", Document No. TR72511, all published by Bellcore.
., s . .
~~1'10589 A plurality of cluster controllers 114 and private exchange telephone systems 115 may be coupled to the enhanced-services processor 120. A plurality of enhanced- ' services processors 120 may also be coupled to one or more 5 local switches 121 for coupling to the telephone network ' 103. Moreover, control stations 112 or augmented base stations 119. may be coupled to local switches 121, enhanced-services processors 120, cluster controllers 114 or base stations 104. The cluster controllers 114 may be 10 coupled to each other for direct routing of calls outside the telephone network 103, e.g. by means of known routing 1 methods. The cluster. controllers 114 may also be coupled to the private exchange telephone system 115, which. may perform routing among them.
In a preferred embodiment, user stations 102 may be coupled to each other in calls outside the telephone network 103. A first user station 102 may initiate a call by initiating communication with a first base station 104 and directing that first base station 104 to initiate a call with a second user station 102. The first base station 104 may route the call to a second base station 104, either directly by couplings between base stations 104 or by means of the private exchange'telephone system 115. The second abase station 104 may direct the second user station.102 (coupled to the second base station 104) to receive. the call. Communication between the first user station 102 and the second user station 102 may be coupled from the first user station 102 to the first base station 104 to the private exchange telephone system 115 to the second base station 104 to the second user station 102, and on. the reverse path.
In a preferred embodiment, if handoff of user stations 102 from an old base station 104 to a new base station 104 occurs while a call outside the telephone network 103 is in progress, the old base station 104 or the new base station 104 may direct the private exchange WO 92/22156 PCT/'US92/04478 ;~~10589 telephone system 115 to reroute the call to use the new base station 104.
$lternative Embodiments While preferred embodiments are disclosed herein, many variations are possible which remain within the concept and scope of the invention, and these variations would become clear to one of ordinary skill in the art after perusal of the specification, drawings and claims herein.
An enhanced-services processor 120 coupled to the telephone network 103 may provide enhanced telephone services within the telephone network 103, as is well known in the art.
After a base station 104 and a user station 102 initiate communication, the user station 102 may communicate with the enhanced-services processor 120 by initiating or receiving messages between the user station 102 and the enhanced-services processor 120, so as to obtain enhanced telephone services within the telephone network 103 just as if the user station 102 was an ordinary telephone on the telephone network 103.
Other and further details on the nature and operation of enhanced-services processors (also known as "intelligent network" processors or adjunct network processors) may be found in "ADVANCED INTELLIGENT NETWORK RELEASE 1 PROPOSAL" (Issued l, November, 1989), Document No. SR-NPL-001509; "ADVANCED
9a INTELLIGENT NETWORK RELEASE 1 BASELINE ARCHITECTURE" (Issued 1, March 1990), Document No. SR-NPL-001555; "AMERITECH PUBLIC
TELEPHONE MESSAGE DELIVERY SERVICE INTERFACE SPECIFICATIONS"
(Issued 1, November, 1989), Document No. AM-TR-MKT-000046;
"INTELLIVIEW NETWORK MANAGEMENT SERVICE TERMINAL INTERFACE
SPECIFICATION, BELL ATLANTIC", Document No. TR72511, all published by Bellcore.
., s . .
~~1'10589 A plurality of cluster controllers 114 and private exchange telephone systems 115 may be coupled to the enhanced-services processor 120. A plurality of enhanced- ' services processors 120 may also be coupled to one or more 5 local switches 121 for coupling to the telephone network ' 103. Moreover, control stations 112 or augmented base stations 119. may be coupled to local switches 121, enhanced-services processors 120, cluster controllers 114 or base stations 104. The cluster controllers 114 may be 10 coupled to each other for direct routing of calls outside the telephone network 103, e.g. by means of known routing 1 methods. The cluster. controllers 114 may also be coupled to the private exchange telephone system 115, which. may perform routing among them.
In a preferred embodiment, user stations 102 may be coupled to each other in calls outside the telephone network 103. A first user station 102 may initiate a call by initiating communication with a first base station 104 and directing that first base station 104 to initiate a call with a second user station 102. The first base station 104 may route the call to a second base station 104, either directly by couplings between base stations 104 or by means of the private exchange'telephone system 115. The second abase station 104 may direct the second user station.102 (coupled to the second base station 104) to receive. the call. Communication between the first user station 102 and the second user station 102 may be coupled from the first user station 102 to the first base station 104 to the private exchange telephone system 115 to the second base station 104 to the second user station 102, and on. the reverse path.
In a preferred embodiment, if handoff of user stations 102 from an old base station 104 to a new base station 104 occurs while a call outside the telephone network 103 is in progress, the old base station 104 or the new base station 104 may direct the private exchange WO 92/22156 PCT/'US92/04478 ;~~10589 telephone system 115 to reroute the call to use the new base station 104.
$lternative Embodiments While preferred embodiments are disclosed herein, many variations are possible which remain within the concept and scope of the invention, and these variations would become clear to one of ordinary skill in the art after perusal of the specification, drawings and claims herein.
Claims (44)
1. A wireless communication system, comprising:
a base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said one base station and said user station and for completing a second communication path between said second base station and said user station; and a plurality of cluster controllers each for controlling a set of distinct base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
a base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said one base station and said user station and for completing a second communication path between said second base station and said user station; and a plurality of cluster controllers each for controlling a set of distinct base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
2. A system as in claim 1, wherein said base station is coupled to said telephone network by a private access link.
3. A system as in claim 1, wherein said base station is coupled to said telephone network by a public access link.
4. A system as in claim 1, wherein said base stations are mobile.
5. A system as in claim 1, wherein said base stations are stationary.
6. A system as in claim 1, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station during a call on said telephone network.
7. A system as in claim 1, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station when said user station moves from a first region to a second region.
8. A system as in claim 1, wherein said user station comprises means for directing requests to an enhanced telephone services processor on said telephone network.
9. A system as in claim 1, wherein said user station comprises means for receiving information from an enhanced telephone services processor on said telephone network.
10. A wireless communication system, comprising:
a base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said one base station and said user station and for completing a second communication path between said second base station and said user station;
a plurality of cluster controllers each for controlling a set of distinct base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller;
wherein said user station comprises means for initiating a call on said telephone network and means for receiving a call on said telephone network independently of said base station.
a base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said one base station and said user station and for completing a second communication path between said second base station and said user station;
a plurality of cluster controllers each for controlling a set of distinct base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said one base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller;
wherein said user station comprises means for initiating a call on said telephone network and means for receiving a call on said telephone network independently of said base station.
11. A system as in claim 10, wherein said means for initiating and receiving independently comprises a cellular telephone circuit.
12. A system as in claim 10, comprising a second base station coupled to said telephone network and having means for coupling a cellular telephone circuit to said telephone network.
13. A system as in claim 10, comprising a spread-spectrum cellular telephone system having said user station as a cellular telephone handset and at least one base station as a cellular telephone base station.
14. A system as in claim 1, comprising:
a second communication path between said base station and said user station; and means for multiplexing signals between said base station and said user station over said one communication path and said second communication path.
a second communication path between said base station and said user station; and means for multiplexing signals between said base station and said user station over said one communication path and said second communication path.
15. A system as in claim 14, comprising means for distinguishing a plurality of channels on said one communication path and said second communication path.
16. A system as in claim 14, wherein said one communication path and said second communication path comprise a plurality of logical identifiers, said logical identifiers being frequency bands, spread-spectrum codes, station identifiers, or timeslots.
17. A wireless communication system, comprising:
a first base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a first user station having means for completing a communication path with said first base station, said communication path employing a spread-spectrum communication technique; and a private exchange telephone system coupled to said first base station and to a second base station, said private exchange telephone system capable of routing a call between said first user station and a second user station in communication with said second base station without use of said telephone network;
wherein said communication path is completed between said first base station and said first user station when said first user station initiates or receives a call on said telephone network and when said first user station initiates or receives a call with said second user station outside said telephone network.
a first base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a first user station having means for completing a communication path with said first base station, said communication path employing a spread-spectrum communication technique; and a private exchange telephone system coupled to said first base station and to a second base station, said private exchange telephone system capable of routing a call between said first user station and a second user station in communication with said second base station without use of said telephone network;
wherein said communication path is completed between said first base station and said first user station when said first user station initiates or receives a call on said telephone network and when said first user station initiates or receives a call with said second user station outside said telephone network.
18. A system as in claim 17, wherein said private exchange telephone system comprises a PBX.
19. A system as in claim 17, wherein said private exchange telephone system comprises a Centrex system.
20. A system as in claim 17, wherein said private exchange telephone system comprises a key-type system.
21. A system as in claim 17, comprising:
a third base station coupled to said telephone network; and means for breaking said communication path between said first base station and said first user station and for completing a second communication path between said third base station and said first user station.
a third base station coupled to said telephone network; and means for breaking said communication path between said first base station and said first user station and for completing a second communication path between said third base station and said first user station.
22. A system as in claim 21, wherein said means for breaking and for completing comprises means for handing-off said first user station from said first base station to said third base station during a call outside said telephone network.
23. A wireless communication system, comprising:
a plurality of base stations coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of user stations having means for completing communication paths with said base stations, at least one of said communication paths employing a spread-spectrum communication technique; and means separate from said plurality of base stations for routing calls among any of said base stations;
whereby one of said user stations is capable of initiating or receiving a call on said telephone network by means of one of said communication paths and is capable of initiating or receiving a call outside said telephone network by means of said means for routing.
a plurality of base stations coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of user stations having means for completing communication paths with said base stations, at least one of said communication paths employing a spread-spectrum communication technique; and means separate from said plurality of base stations for routing calls among any of said base stations;
whereby one of said user stations is capable of initiating or receiving a call on said telephone network by means of one of said communication paths and is capable of initiating or receiving a call outside said telephone network by means of said means for routing.
24. A system as in claim 23, wherein said means for routing comprises a PBX, Centrex or key-type system.
25. A system as in claim 23, comprising at least one of said user stations coupled to said means for routing by means of a communication path not including any of said base stations.
26. A wireless communication system, comprising:
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a plurality of base stations, each one of said plurality of base stations associated with exactly one of said plurality of cluster controllers, each one of said plurality of base stations having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a plurality of base stations, each one of said plurality of base stations associated with exactly one of said plurality of cluster controllers, each one of said plurality of base stations having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
27. A wireless communication system comprising:
a switch coupled to a telephone network;
a first base station having means for establishing a first communication link with said switch, means for initiating a call on said telephone network, and means for receiving a call on said telephone network, said first base station being augmented to additionally function as a non-spread-spectrum cellular base station in a cellular wireless telephone network;
a first user station having means for completing a spread-spectrum communication path with said first base station, wherein said spread-spectrum communication path is completed between said first base station and said first user station when said first user station initiates or receives a call on said telephone network;
a second user station having means for completing a non-spread-spectrum cellular voice communication path with said first base station, such that said second user station may have direct access to said telephone network; and a cluster controller, said cluster controller being coupled to said first base station and to said switch and providing a second communication link between said first base station and said switch;
wherein said cluster controller is coupled to a second base station and comprises means for effecting a handoff of said first user station from said first base station to said second base station, such that a second spread-spectrum communication path may be established between said first user station and said second base station; and wherein said first base station bypasses said cluster controller to allow said second user station direct access to said telephone network when said second user station completes said non-spread-spectrum cellular voice communication path with said first base station.
a switch coupled to a telephone network;
a first base station having means for establishing a first communication link with said switch, means for initiating a call on said telephone network, and means for receiving a call on said telephone network, said first base station being augmented to additionally function as a non-spread-spectrum cellular base station in a cellular wireless telephone network;
a first user station having means for completing a spread-spectrum communication path with said first base station, wherein said spread-spectrum communication path is completed between said first base station and said first user station when said first user station initiates or receives a call on said telephone network;
a second user station having means for completing a non-spread-spectrum cellular voice communication path with said first base station, such that said second user station may have direct access to said telephone network; and a cluster controller, said cluster controller being coupled to said first base station and to said switch and providing a second communication link between said first base station and said switch;
wherein said cluster controller is coupled to a second base station and comprises means for effecting a handoff of said first user station from said first base station to said second base station, such that a second spread-spectrum communication path may be established between said first user station and said second base station; and wherein said first base station bypasses said cluster controller to allow said second user station direct access to said telephone network when said second user station completes said non-spread-spectrum cellular voice communication path with said first base station.
28. The wireless communication system of claim 1, further comprising an enhanced services processor interposed between at least one of said cluster controllers and said telephone network.
29. The wireless communication system of claim 1, further comprising a PBX interposed between at least one of said cluster controllers and said telephone network.
30. The wireless communication system of claim 1, further comprising a PBX, at least one of said cluster controllers having alternative paths to said telephone network and to said PBX.
31. A wireless communication system, comprising:
a first base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said first base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said first base station and said user station and for completing a second communication path between said second base station and said user station;
a plurality of cluster controllers for controlling a set of base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller; and a third base station coupled to said telephone network and having means for coupling a cellular telephone circuit to said telephone network;
wherein said user station comprises means for initiating a call on said telephone network and means for receiving a call on said telephone network through said third base station, independently of said first base station and second base station.
a first base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a communication path with said first base station, said communication path employing a spread-spectrum communication technique;
wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
means for breaking said communication path between said first base station and said user station and for completing a second communication path between said second base station and said user station;
a plurality of cluster controllers for controlling a set of base stations, wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller; and a third base station coupled to said telephone network and having means for coupling a cellular telephone circuit to said telephone network;
wherein said user station comprises means for initiating a call on said telephone network and means for receiving a call on said telephone network through said third base station, independently of said first base station and second base station.
32. The wireless communication system of claim 31, further comprising an enhanced services processor connecting said first cluster controller and said second cluster controller to said telephone network.
33. A wireless communication system, comprising:
a switch coupled to a telephone network;
a first base station coupled to said switch and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with said first base station, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to said telephone network and having means for coupling a cellular telephone circuit to said telephone network; and means in said user station for initiating a call on said telephone network and for receiving a call on said telephone network through said second base station, independently of said switch.
a switch coupled to a telephone network;
a first base station coupled to said switch and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with said first base station, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network;
a second base station coupled to said telephone network and having means for coupling a cellular telephone circuit to said telephone network; and means in said user station for initiating a call on said telephone network and for receiving a call on said telephone network through said second base station, independently of said switch.
34. A wireless communication system, comprising:
a private exchange telephone system connected to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of base stations;
a plurality of user stations having means for completing communication paths with said base stations; and a cluster controller interposed between said base stations and said private exchange telephone system, said cluster controller comprising means for routing a call from a first one of said base stations to a second one of said base stations.
a private exchange telephone system connected to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of base stations;
a plurality of user stations having means for completing communication paths with said base stations; and a cluster controller interposed between said base stations and said private exchange telephone system, said cluster controller comprising means for routing a call from a first one of said base stations to a second one of said base stations.
35. The wireless communication system of claim 34, wherein said private exchange telephone system comprises a PBX.
36. The wireless communication system of claim 34, wherein at least one of said communication paths employs a spread-spectrum communication technique.
37. A wireless communication system, comprising:
a private exchange telephone system connected to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of base stations;
a plurality of user stations having means for completing communication paths with said base stations; and a cluster controller interposed between said base stations and said private exchange telephone system, said cluster controller comprising means for routing a call from a first one of said base stations to a second one of said base stations.
a private exchange telephone system connected to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a plurality of base stations;
a plurality of user stations having means for completing communication paths with said base stations; and a cluster controller interposed between said base stations and said private exchange telephone system, said cluster controller comprising means for routing a call from a first one of said base stations to a second one of said base stations.
38. A wireless communication system, comprising:
a switch coupled to a telephone network;
an enhanced services processor connected to said switch;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said enhanced services processor;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
a switch coupled to a telephone network;
an enhanced services processor connected to said switch;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said enhanced services processor;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
39. The wireless communication system of claim 38, further comprising a PBX interposed between one of said cluster controllers and said telephone network.
40. The wireless communication system of claim 38, further comprising a PBX, at least one of said cluster controllers having alternative connection paths to said telephone network and to said PBX.
41. A wireless communication system, comprising:
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a PBX connected between one of said cluster controllers and said switch;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a PBX connected between one of said cluster controllers and said switch;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
42. The wireless communication system of claim 41, further comprising an enhanced services processor connected between at least one of said cluster controllers and said telephone network.
43. A wireless communication system, comprising:
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a PBX, at least one of said cluster controllers having alternative paths to said telephone network and to said PBX;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
a switch coupled to a telephone network;
a plurality of cluster controllers for controlling a set of base stations, at least one of said plurality of cluster controllers coupled to said switch;
a PBX, at least one of said cluster controllers having alternative paths to said telephone network and to said PBX;
a plurality of base stations, each said base station connected to one of said cluster controllers, each said base station having means for initiating a call on said telephone network and means for receiving a call on said telephone network;
a user station having means for completing a spread-spectrum communication path with a first base station of said plurality of base stations, wherein said communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network; and means for breaking said communication path between said first base station and said user station and for completing a second communication path between a second base station of said plurality of base stations and said user station;
wherein said means for breaking and for completing comprises means for handing-off said user station from said first base station to said second base station when said user station terminates a call relating to a first cluster controller and initiates a call relating to a second cluster controller.
44. The wireless communication system of claim 43, further comprising an enhanced services processor connected between at least one of said cluster controllers and said telephone network.
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- 1992-06-02 AT AT01112700T patent/ATE303702T1/en not_active IP Right Cessation
- 1992-06-02 JP JP5500554A patent/JPH06508247A/en active Pending
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- 1992-06-02 WO PCT/US1992/004478 patent/WO1992022156A1/en active IP Right Grant
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- 1992-06-02 AT AT97109814T patent/ATE213380T1/en active
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- 1992-06-02 KR KR1019930703703A patent/KR100262370B1/en not_active IP Right Cessation
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1994
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