WO1997035449A2 - Fixed wireless terminals in network management method and apparatus - Google Patents
Fixed wireless terminals in network management method and apparatus Download PDFInfo
- Publication number
- WO1997035449A2 WO1997035449A2 PCT/US1997/004503 US9704503W WO9735449A2 WO 1997035449 A2 WO1997035449 A2 WO 1997035449A2 US 9704503 W US9704503 W US 9704503W WO 9735449 A2 WO9735449 A2 WO 9735449A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wts
- wireless telecommunications
- management computer
- network management
- network
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- 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
- H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]
Definitions
- This invention relates generally to wireless telecommunications and more particularly
- Wireless telecommunication also offers significant savings in
- This invention recognizes the need for a plurality of signals being received and simultaneously transmitted over RF channels. While this invention clearly notes the need for a network of remote terminals, the issue of how to monitor the health of the subscribers' terminals on the network is not discussed. The invention only deals with the subscriber
- Patent No. 5,295, 178 to Nickel et al. was granted for a "Digital Signal Processor for Radio Base Station.” This particular invention deals with a DSP in a base station that
- the key emphasis of this invention is dealing with a tone control squelching coder for the control of a processor. It does not deal
- Patent No. 4,890,315 to Bendixen et al. was granted for a "Cellular Remote Station with Multiple Coupled Units.”
- This invention does describe a network system for coupling a plurality of telephones to a remote land line telephone system including interfaces.
- This system deals with cellular "remote cellular "station” communicating with subscriber terminals but also being able to communicate with the public switching telephone network.
- the invention allows normal telephone systems to be used with a cellular telephone
- This invention begins to deal with the issue of monitoring the health of an individual subscriber terminal locally but does not provide network- wide maintenance nor management functionality.
- Patent No. 5,031 ,204 to McKernan was granted for an "Interactive Diagnostic System for Cellular Telephones.” This invention allows monitoring ofthe health of an individual cellular telephone unit from that specific cellular telephone unit upon initialization by the sales agent. Again, the ability to monitor the network of subscribers of remote telephone
- Wireless terminals WTs are devices that are deployed at a subscriber's site to provide a wireless connection between a subscriber's telephone and the network infrastructure or may
- the only parameter which is generally factory set is a serial number which is isolated from tampering.
- a serial number is isolated from tampering.
- operational parameters are set in one ofthe following ways: I. A new subscriber configures the WT at the place of purchase using an expensive extemal computer system. After that the subscriber or technician installs the WT on the subscriber's premises. 2. An WT is installed on the subscriber's premises and the telephone company sets the operational parameters in the new WT over the air using a temporary directory telephone number that is assigned to the WT at the factory. This number is used only for initialization purposes and is valid until the telephone company sets the operational directory telephone number equivalent to the mobile identification number MIN in a mobile wireless network in the new
- the present invention comprises both a network management system for installing, initializing, and managing WTs, and the WTs themselves which represent a new generation of efficient wireless terminals.
- the WT is first described, followed by the architecture that
- FIG. 1 is the wireless terminal (WT) architecture
- Figure 2 is wireless terminal architecture detail
- Figure 3 is the wireless terminal call control Figure 4 is initialization process of the wireless terminal
- Figure 5 is initialization process of the wireless terminal (alternate)
- Figure 6 is network management system architecture
- Figure 7 is OAMPC architecture
- Figure 8 is WLL network management system hierarchy
- Figure 9 is maintenance procedure for the wireless terminal
- Figure 10 is maintenance procedure for the wireless terminal (alternate)
- the wireless terminal architecture is shown.
- the WTS may be either fixed or mobile.
- the WT
- an antenna 10 which is connected to a radio frequency RF
- Signals from the RF front end 12 are sent to a digital signal processor
- the DSP and controller 14 are ofthe type manufactured by Texas
- TMS320C50 which comprises memory and ability to process and receive commands from a remote source.
- the DSP and controller 14 is connected to a
- the telephone line interface 16 which converts signals from the DSP to available signals suitable for use with normal telephone equipment.
- the telephone interface comprises an RJ11
- the antenna 10 is shown in more detail.
- the antenna 10 is shown in more detail.
- a duplexer 20 whose function is to receive incoming signals from the antenna 10 as well as to present outgoing signals to the antenna 10 when a telephone call from the
- the duplexer 20 presents the received RF signal to a front end down
- the down converter 22 converts the radio frequency band to a lower intermediate
- This IF is digitized and the digital signal is then sent to the digital signal processor DSP 24.
- the DSP demodulates the data and, during one time interval, handles the base station to terminal protocol. During another time interval, it formats the voice data into
- telephone line interface can then have a telephone 28, a fax 30, or a computer 32 hooked up to it via a standard RJ11 phone jack or terminal block.
- the DSP 24 handles the base station to terminal protocol in one cycle, and
- the base band modulated voice data is then sent in quadrature form I&Q data to the radio frequency up convert block
- the signal is then passed to the duplexer 20 which provides the ability to use the same antenna for transmit and receive simultaneously full duplex. Thereafter, it is sent via RF to either the network in the normal case or the network management system when under remote management which is explained in more detail below.
- the network management system center or OAMPC also referred to as the "network management computer" cooperates with the capabilities ofthe WT to form the network management system ofthe present invention.
- the DSP in the WT supports various protocols to the network management center such as a CCITT V.22 type. This link operates in the same manner as a traditional modem over a cellular network. This scheme allows a WT to support network management system features with any vendor's base station. The following functions are supported by the WTs network management interface. 1.
- the WT can be entirely reprogrammed to support additional or different features, air interfaces, services and flexible dialing rules.
- the WT has flash memory on board to support remote uploads with a protective kernal.
- the network management system center can log onto the WT and perform many tests such as bit error rate BER tests, voice loop back tests, and other built in tests as well as gather utilization, performance; and other statistics.
- the WT generates alarms by contacting the network management system center under certain irregular or out-of-specification conditions.
- the DSP reduces the circuitry needed for much of the phone line interface circuitry since all tone generation dial tone, busy, reorder, etc., dual tone multi-
- the DSP can support voice activated commands, voice encryption, voice synthesis and analysis and remotely programmable flexible dialing rules.
- An additional functionality ofthe DSP is to accept modifications to dialing rules that occur due to changes in the network. For example, currently land line switches detect the
- end of dialing sequence using a set of defined dialing rules residing in the switch.
- the present invention simulates a land line switch by
- the new dialing rule data base is remotely uploaded from the OAMPC to the data storage
- each WT contains its own dialing rule data base. Without this
- dialing rules that may be created are:
- the DSP Since the DSP handles functions in alternating time intervals, it services the phone line control functions during one time interval or is in the conversation mode during a second time interval i.e. communicating with a base station. Thus, the computing power required by the DSP is greatly reduced since it does not simultaneously handle all types of events.
- the flow diagram ofthe WT call control is described.
- the WT begins in an idle state awaiting an off-hook interrupt.
- the dial tone generation function is
- the DSP then checks to determine if dialing is detected 44. This dial detection is maintained until such time as that dialing is detected or a timer expires.
- the dial tone generation is turned off 46.
- the DSP then receives the dialing information from either pulse or tone and decodes the dialing and applies the dialing rules
- the DSP detects and then checks to determine if the dialing has been appropriately accomplished 50. If the dialing is determined to be
- the DSP sends the dialed number to the base station 52 and a voice channel
- the DSP awaits the situation where the
- call is terminated 62. If the call is not terminated, me DSP determines that the call is still in progress 60 and the voice channel assignment is maintained. When the call is terminated, the voice channel is released 64 and the overall system is returned to the idle state 40.
- the WT receives calls by responding to a page command 66 from the base station.
- voice channel is assigned 68 and an alert is received from base station 70. Thereafter, a ring is sent to the phone line 72 and the DSP awaits the
- DSP monitors the call in progress 60, waits for the call to be terminated 62, releases the voice
- the DSP does not need to perform all tasks simultaneously and thus is capable of other functions as well such as voice detection and recognition.
- the initialization process ofthe WT is shown. This process may be conducted locally, that is, the site ofthe WT. Initially, the telephone is placed in an off- hook condition 202. The DSP then determines whether the off-hook condition does in fact
- the DSP determines if a valid password is dialed via keypad of standard phone 203. If an invalid password or error in password is entered, the DSP returns the
- the DSP determines if a parameter has in fact been entered 208. If a parameter has not been entered, the DSP monitors a specific time period 10 and unless a specific time out has elapsed, the DSP remains in the condition to receive parameters. If a time out has in fact expired, the DSP
- the DSP deletes all initialized parameters and returns to the waiting state. If a WT parameter has been entered, the DSP determines if the parameter entered is correct 230. If the parameter is correct, the DSP stores the appropriate parameter 228 and
- the DSP In the event that the parameter is not correct, the DSP generates a busy tone, and returns to a state where it is awaiting parameter entry 204.
- the WT sends the initialized values of parameters to
- the telephone company for verification 218. If the verification is successful 220, the DSP
- the DSP In the event that the verification 220 is not successful, the DSP generates a busy tone
- the DSP has the capability of generating a voice message at various locations within the initialization procedure. For example, in the event that a last parameter has not been entered, the DSP generates an "enter parameter number"
- the DSP can generate a specific error message 242 which more specifically designates the error that has been made.
- the DSP can also generate an "error parameter number" message
- wireless local loop is shown.
- provisioning and maintenance center OAMPC also referred to as the network management computer performs network management functions for the entire WLL system.
- the OAMPC 80 communicates through the public switch telephone network PSTN 82 with a mobile
- the switching center MSC 96 provides switching between WTs and the PSTN via
- base stations BS 98 Communications between WTs 100, 102, 104, 106 and the base station
- 98 is performed via radio channels using interfaces such as AMPS, NAMPS, TDMA, TACS,
- ETACS CTACS
- NMT-450 NMT-900
- IS-136 GSM
- CDMA Code Division Multiple Access
- wireline switches 84 which provide switching between
- WTs and the PSTN via a wireless channel bank WCB 86 are WTs and the PSTN via a wireless channel bank WCB 86.
- Signaling between the WLL OAMPC and the WT may use a standard or proprietary
- the WLL OAMPC comprises a network element interface WLL NEI 116, a management information base WLL
- MIB 110 network management applications WLL NMA 114, and a graphical user interface
- the WLL NEI 116 performs communications between the WLL OAMPC 80 and all
- the WLL MIB 110 is a relational database
- the WLL MIB 110 comprises rules for responding to problems encountered on the network. If a particular out-of-specification condition is communicated to the OAMPC by a WT, the OAMPC can automatically respond with instruction to correct the particular out-of-spec condition.
- the WLL NMA 114 includes all functions relevant to the management ofthe WLL system.
- the WLL GUI is an based interface between the operator
- the WLL NEI 116 also handles all interaction with the public switch
- the OAMPC can receive periodic reports from network elements such as WTs on the health ofthe WTs. These are accomplished on a preset reporting schedule where each WT has a specific time to report its operational characteristics to the OAMPC.
- the operator at the WLL OAMPC can perform both manual and automatic testing of the network. In manual testing, the operator logs onto an WT and performs tests or retrieves data concerning that WT. In the automatic test mode the operator sets up a schedule for the OAMPC to log on to one or more WTs and thereafter the OAMPC automatically performs
- each WT is assigned a dedicated test identification number TIN.
- the WLL OAMPC dials the TIN of each WT to log onto the WT in order to initialize testing and retrieve information concerning the health ofthe WT without ringing the associated telephone.
- a group test identifier GTI is assigned. In this test mode the WLL OAMPC dials in at broadcast mode the GTI to all WTs. Each WT in the group has its own timer set to a different time interval unique for each WT. Each WT will respond to the WLL OAMPC when its timer expires. A lack of response from a WT indicates that there has
- each WT has a specific reporting schedule. In this mode the WT initiates a call to the WLL OAMPC at a predetermined time. The WT automatically performs tests such as an audio loop back test,
- the WLL OAMPC then collects the test results from all WTs according to the schedule, automatically checking these results for any performance problems and stores the result for further analysis or, communicated a corrective action to the ailing WT based on stored response rules in the OAMPC. If the WLL OAMPC does not receive the report from an WT at a predetermined time, it is an indication that there has been a cornmunications problem related to the WT.
- NMS WLL network management system
- Each information category is hierarchically organized
- the WLL network system may be divided into areas. Each area consists of several offices.
- Each WLL network consists of some or all ofthe following wireline switches 300, MSCs 302, WCBs 304, BSS 306, and WTs 308.
- Each area 310 contains one or more BSs
- Each office 312 contains several WTs.
- a WLL network is operated and maintained by the personnel that includes a superuser 320, supervisors 322, operators 324, and technicians.
- the superuser is primarily responsible
- the superuser may also monitor status and performance and modify parameters ofthe lower level network elements.
- the superuser has the highest authority and all access rights to the WLL MIB information.
- the superuser also oversees all supervisors, operators, and technicians.
- supervisors Each supervisor controls a set of BSs and WCBs in the area that is assigned to the supervisor. In addition, a supervisor may also control the WTs that are connected to the assigned BSs and WCBs. Each area may have one or more supervisors assigned. Each supervisor has a group of operators and technicians reporting to him or her. All supervisors report to the superuser. The lowest level of personnel hierarchy are operators. Each operator is responsible for a subset of WTs, usually in a contiguous geographic area. Each office may have one or more operators assigned. Each supervisor has one or more operators reporting to him or her. Technicians support the network management staff by repairing the failure, in network elements, and installing, upgrading or replacing the network elements.
- the WLL network management applications NMAs are performed by the WLL network management personnel.
- the applications are also hierarchally organized. There are three levels ofthe hierarchy. Each one of them includes a subset of network management applications. Only the superuser may perform all ofthe defined applications.
- Each supervisor may perform only the applications related to the information on his or her subordinates, that is, operators and technicians, as well as the network elements that are within his or her responsibility.
- Each operator may perform only the application related to the network elements that he or she is responsible for.
- the WLL network management applications include all five OSI standard categories, as follows: performance management, fault management, configuration management, accounting management, and security management.
- the wireless local loop graphical user interface WLL GUI is the user interface between the WLL OAMPC and the personnel who manage the WLL system.
- the WLL GUI is also hierarchically organized. For each level ofthe staff hierarchy there is a separate GUI providing the access to the corresponding scope ofthe network management applications available to that particular staff level.
- the WLL network management system is protected with password mechanism.
- the WLL GUI Upon power up or reset, the WLL GUI requests from the user the user's identifier and password. When the user enters this information, the WLL GUI checks to see if the user is a valid user. If the check-up is positive, the WLL GUI determines the
- the DSP first determines if the phone is off-hook 250. If the phone is off-hook then the DSP
- test sequence password determines if a test sequence password has been dialed 252. If the test sequence password is
- the DSP determines that a normal telephone call is being placed and the call is processed 266. If a test sequence password is being detected, the DSP generates a beep
- the DSP will remain in an alert state ready for its instructions.
- the DSP In the event that the time out period has expired, the DSP generates a busy tone 260 and waits for the phone to be placed in an on-hook condition 262.
- the maintenance procedure is ended.
- an appropriate test number is entered 256 the DSP determines if this is a valid test number
- test number is not a valid number
- the DSP generates a busy tone 278 and returns
- the DSP determines if the test number is the end ofthe test procedure 276. If the test procedure is in fact ended, the DSP generates a dial tone and
- the DSP executes
- the specified test 274 determines if the test has been passed 270. If the test has not passed, the DSP generates a busy tone 268 and returns to the waiting state, waiting for an
- the wireless local loop architecture comprising both a specific architecture for managing a wireless local loop system as well as a fixed wireless terminal which can be remotely maintained and scanned for purposes of overall network management combines to form an extremely cost effective communications system that significantly reduces the problems associated with wired cornmunications and the maintenance associated with such a
- the overall architecture is a much more cost effective overall telecommunications infrastructure that can be instituted in remote or rural areas or developing countries without the added burden of stringing telephone wires over extended locations.
- Those skilled in the art will appreciate that other similar implementations may be possible for such a wireless communications infrastructure without departing from the spirit and the specification as described.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002252872A CA2252872C (en) | 1996-03-20 | 1997-03-06 | Fixed wireless terminals in network management method and apparatus |
EP97916872A EP0888697A1 (en) | 1996-03-20 | 1997-03-06 | Fixed wireless terminals in network management method and apparatus |
HU9902823A HU221940B1 (en) | 1996-03-20 | 1997-03-06 | Wireless telecommunication network and method for manageing and monitoring the network |
APAP/P/1998/001363A AP940A (en) | 1996-03-20 | 1997-03-06 | Fixed wireless terminals in network management method and apparatus. |
AU25376/97A AU728862B2 (en) | 1996-03-20 | 1997-03-06 | Fixed wireless terminals in network management method and apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/618,581 US5819177A (en) | 1996-03-20 | 1996-03-20 | Fixed wireless terminals with network management method and apparatus |
US08/618,581 | 1996-03-20 |
Publications (2)
Publication Number | Publication Date |
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WO1997035449A2 true WO1997035449A2 (en) | 1997-09-25 |
WO1997035449A3 WO1997035449A3 (en) | 1997-11-20 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/US1997/004503 WO1997035449A2 (en) | 1996-03-20 | 1997-03-06 | Fixed wireless terminals in network management method and apparatus |
Country Status (11)
Country | Link |
---|---|
US (1) | US5819177A (en) |
EP (1) | EP0888697A1 (en) |
CN (1) | CN1104154C (en) |
AP (1) | AP940A (en) |
AU (1) | AU728862B2 (en) |
CA (1) | CA2252872C (en) |
CH (1) | CH693221A5 (en) |
HU (1) | HU221940B1 (en) |
IL (1) | IL126639A (en) |
RU (1) | RU2196392C2 (en) |
WO (1) | WO1997035449A2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
IL126639A (en) | 2002-08-14 |
AU728862B2 (en) | 2001-01-18 |
IL126639A0 (en) | 1999-08-17 |
EP0888697A1 (en) | 1999-01-07 |
WO1997035449A3 (en) | 1997-11-20 |
CN1104154C (en) | 2003-03-26 |
CN1219330A (en) | 1999-06-09 |
US5819177A (en) | 1998-10-06 |
CA2252872C (en) | 2002-07-30 |
CA2252872A1 (en) | 1997-09-25 |
HU221940B1 (en) | 2003-02-28 |
CH693221A5 (en) | 2003-04-15 |
AU2537697A (en) | 1997-10-10 |
RU2196392C2 (en) | 2003-01-10 |
AP940A (en) | 2001-02-12 |
AP9801363A0 (en) | 1998-12-31 |
HUP9902823A3 (en) | 2000-04-28 |
HUP9902823A2 (en) | 1999-12-28 |
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