WO1999021379A1 - Method and apparatus for preventing misrouting of data in a radio communication system - Google Patents
Method and apparatus for preventing misrouting of data in a radio communication system Download PDFInfo
- Publication number
- WO1999021379A1 WO1999021379A1 PCT/SE1998/001823 SE9801823W WO9921379A1 WO 1999021379 A1 WO1999021379 A1 WO 1999021379A1 SE 9801823 W SE9801823 W SE 9801823W WO 9921379 A1 WO9921379 A1 WO 9921379A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication station
- address
- wireless communication
- identify
- host
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5053—Lease time; Renewal aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5076—Update or notification mechanisms, e.g. DynDNS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5084—Providing for device mobility
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
Definitions
- the present invention relates generally to the communication of packet data with a wireless host identified with a temporary address during a communication session between the wireless host and another host device. More particularly, the present invention relates to a method and apparatus for preventing misrouting of data subsequent to an abnormal termination of the communication session by the wireless host.
- the other host device When the communication session is terminated by the wireless host abnormally, the other host device is unaware of the termination and continues sending packet data. Operation of an embodiment of the present invention selectively withholds reassignment of the temporary address, used to identify the terminating wireless host, thereby to prevent reassignment of the temporary address to identify another wireless host. Misrouting of data from the other host device to an other-than- intended wireless host is thereby avoided.
- An embodiment of the present invention is operable, for instance, in an Internet application.
- a wireless host is coupled, in such an application, by way of a mobile communication system and an Internet backbone to an Internet host.
- the temporary address used to identify the wireless host is not immediately reassigned to identify another wireless host, thereby avoiding the misrouting of data to an other-than- intended wireless host.
- a cellular telephone system is exemplary of a communication system made feasible due to such advancements.
- Communication pursuant to a cellular telephone system, or other radio telephonic system is advantageous as a radio frequency communication channel forms the communication channel connecting a sending and a receiving station operable therein. Because a radio frequency communication channel forms the communication channel, fixed or hard-wired connections are not required to be formed between the sending and receiving stations. Utilization of a cellular, or other radio telephonic, communication system is therefore particularly advantageous when the use of fixed or hard-wired connections to effectuate communications would be inconvenient or impractical.
- New services and new forms of communication for new radio communication systems and pursuant to already-installed cellular, and other radio telephonic, networks have also been developed.
- Packet data communication systems for instance, have been developed.
- information which is to be transmitted between a sending and a receiving station is formatted into discrete packets of data.
- the packets are sent on a communication channel from the sending station to the receiving station. Because the information is communicated by way of discrete packets which can be transmitted during intermittent bursts, the sending station utilizes the channel only during the time periods required to send the discrete packets.
- a shared channel used by a plurality of sending stations, can be used. Because a single channel can be shared by the plurality of sending stations, dedicated channels allocated to individual ones of the sending stations is not required. Lowered costs of communication are thereby possible.
- Communications effectuated via the Internet and communications effectuated pursuant to paging networks are exemplary of communication systems in which packet data is transmitted.
- Standards have also, e.g., been set forth for the communication of packet data in existing cellular networks.
- GPRS general packet radio service
- communications proposed for the existing GSM (general system for mobile communications) cellular communication system is one such proposal.
- GPRS provides an existing GSM cellular network with the capability of communicating packet data.
- a communication station referred to as a host, such as a notebook computer, sends and receives packet data.
- a host is formed of a computing device.
- the host accesses the
- the host is formed of a notebook computer, or other portable device. And, when the Internet is accessed by way of a radio communication system, the host is also coupled to a radio transceiver, such as a mobile station or, e.g., a PCMCIA radio modem card.
- a radio transceiver such as a mobile station or, e.g., a PCMCIA radio modem card.
- the host, together with the mobile station, or analogous device, shall, at times, together hereafter be referred to collectively as a wireless communication station or a "wireless host".
- IP Internet protocol
- Analogous addresses are used pursuant to other protocols, such as the X.25 protocol.
- the identification address used to identify the wireless communication station can be assigned temporarily with a temporary identification address. By assigning a temporary address to identify a wireless communication station, packet data can be addressed with the temporary address. And, therefore, the packet data can be routed to the wireless communication station.
- the wireless communication station need not have a permanent identification assigned to it as a new temporary address can be assigned to the wireless communication station for each communication session. Also, because a temporary address is used to identify the wireless communication station for only a limited time, the same address can be reassigned for use by different wireless communication stations on an as-needed basis.
- the wireless communication station might access another host device to request information therefrom.
- a notebook computer might form a portion of the wireless communication station. If the notebook computer shuts down during a communication session without undergoing normal log-out procedures, the other host device might not be informed of the termination of the communication session. The other host device similarly might not be informed of the termination if supply of power to the wireless communication station is interrupted, or the wireless communication station moves beyond range of the radio communication network through which it accesses the Internet.
- the temporary address used to identify the wireless communication station might be reassigned to another wireless communication station. And, packet data might be misrouted to the wireless communication station newly-identified with the temporary identification address. A manner by which to prevent misrouting of packet data subsequent to an abnormal, communication session termination would therefore be advantageous.
- the present invention accordingly, advantageously provides a method and apparatus for preventing misrouting of data subsequent to an abnormal termination of a communication session between a wireless host and another host device.
- the wireless host is identified by a temporary address.
- the other host device unaware of the termination, continues to send packet data.
- An embodiment of the present invention selectively withholds reassignment of the temporary address. Thereby, reassignment of the temporary address to identify another wireless host is prevented. Misrouting of data communicated by the other host device to an other-than-intended wireless host is thereby avoided.
- a wireless host accesses the other host device by way of an Internet connection utilizing an Internet protocol, such as TCP/IP.
- an Internet protocol such as TCP/IP.
- the temporary address used to identify the wireless host is not immediately reassigned to identify another wireless host. Instead, the temporary address is identified as being unavailable for reassignment. Because the temporary address cannot be reassigned for at least a selected period, misrouting of data from the host device to an other-than-intended wireless host is avoided.
- Prevention of the misrouting of data from a host device to an other-than- intended wireless host reduces the traffic load of unwanted traffic in the radio communication system as the data which otherwise would be misrouted is instead discarded and not transmitted over a radio link to the wireless host. Additionally, if charges to users of the Internet services of radio communication system are dependent upon traffic volume communicated in the radio communication system, prevention of misrouting of the data prevents corresponding charging for traffic which cannot be transmitted to the appropriate wireless host due to the abnormal termination of the communication session.
- a method, and corresponding apparatus communicates packet data during a communication session between a selected communication station and a wireless communication station by way of a communication network.
- the wireless communication station is identified by a dynamically-assigned address.
- the dynamically-assigned address is selected from an address list. Misrouting of the data subsequent to an abnormal session end by the wireless communication station and formation of a half-open connection is prevented.
- a determination is made as to whether the communication session has ended abnormally. If the communication session is determined to have ended abnormally, the address list from which the dynamically-assigned address is selected is updated. The address list is updated with an indication that the dynamically-assigned address used temporarily to identify the wireless communication station is unavailable for reassignation to identify another wireless communication station for a selected time period.
- FIGURE 1 illustrates a functional block diagram of an exemplary communication system in which an embodiment of the present invention is operable.
- FIGURE 2 illustrates a time-line diagram illustrating operation of an embodiment of the present invention.
- FIGURE 3 illustrates a sequence diagram showing the signaling sequences during operation of an embodiment of the present invention.
- FIGURE 4 illustrates an address list having address availability information updated during operation of an embodiment of the present invention.
- FIGURE 5 illustrates a method flow diagram illustrating the method of operation of an embodiment of the present invention.
- a packet-data, mobile communication system permits packet-data communication between two communication stations, here an Internet host 12 and a wireless host 14.
- the communication system 10 is exemplary in nature and, as shown, generally corresponds to a communication system constructed to be operable pursuant to the standard specification of the GSM (Global System for Mobile Communications)
- Mobile communications system.
- Other communication systems can similarly be represented, such as a system compliant with the standard specification of the PDC (pacific digital cellular) system.
- an embodiment of the present invention is similarly operable in such other communication systems.
- the wireless host 14 forms a processing station, such as a notebook computer, which is coupled to a radio transceiver 16, here a mobile terminal operable in a cellular communication system.
- the radio transceiver 16 is alternately formed of other radio transceivers, such as a PCMCIA radio modem.
- the radio transceiver 16 is operable to convert signals generated by the processing station 14 into a form to permit its transmission upon a radio link formed between the radio transceiver 16 and the network infrastructure of the communication system 10.
- the wireless host 14 and transceiver 16 together form a wireless communication station 18 of which the host 14 forms a data source of data sink.
- the network infrastructure of the communication system 10 includes abase transceiver station 22 positioned in conventional fashion to transceive communication signals with the radio transceiver 16 by way of the radio link formed therebetween.
- the base station 22 is, in turn, coupled to a base station controller 24.
- the base station controller 24 is operable to control operation of the base station 22 as well as selected others of the base stations (not shown in the Figure) of the communication system 10.
- the base station controller 24 is, in turn, coupled to a packet-data, mobile switching center 28.
- the switching center 28 performs switching functions for providing connections for forming signal paths to permit the communication of packet-data between the Internet host 12 and the wireless host 14.
- the packet-data mobile switching center 28 may be physically co-located with a switching center (not shown in the Figure) used during the transmission of circuit-switched data communicated to, or by, the wireless communication station 18.
- the packet-data, mobile switching center 28 is, in turn, coupled to a router 32 which is operable to route packet-data originated at the Internet host 12 or to be terminated thereat.
- the router in turn, is coupled to an IP network backbone 34 to which the Internet host 12 is coupled, in conventional manner.
- the packet-data mobile communication system 10 advantageously permits the communication of packet-data between the wireless host 14 and almost any Internet host 12 coupled to the IP network backbone 34. That is to say, the wireless host 14 is accessible by almost any Internet host 12, and any Internet host 12 is accessible by a wireless host 14. To effectuate communications, the wireless host 14 is assigned with a temporary IP address to identify the wireless host for a particular communication session.
- the temporary IP address is assigned to the wireless host 14 during establishment of a connection by the wireless host 14 to communicate by way of an Internet connection with an Internet host.
- a point-to-point protocol PPP
- PGP point-to-point protocol
- the temporary IP address becomes available for reallocation and reassignment to identify a host pursuant to another communication session.
- Operation of an embodiment of the present invention avoids problems which might result in the event of an abnormal termination of the communication session by the wireless communication station 18.
- An abnormal communication session termination might occur if, for example, a user of the wireless host 14 terminates power to the wireless host during a communication session. If the wireless host 14 is formed of a notebook computer, for instance, a user of the notebook computer might shut down the computer without performing normal log-off procedures or if a portable power supply powering the notebook computer discharges to an extent preventing continued operation of the host.
- An abnormal termination of the communication session might also occur if the radio transceiver 16 loses contact with the network infrastructure of the communication system or if a portable power supply powering the radio transceiver discharges to prevent its continued operation.
- the radio link with the wireless communication station is disconnected. But the IP address, previously used to identify the wireless host 14 during the communication session is not immediately marked to be available for reallocation and assignment to identify another host. Instead, the IP address is indicated to be unavailable for reallocation and reassignment for at least a selected time period.
- the packet-data mobile switching center 28 is here shown to include, inter alia, switching circuitry 38 performing the communication path between the base station controller 24 and the router 32.
- the switching center 28 further includes a determiner 42 which is coupled to receive indications of communication signals generated by the wireless communication station 18 and received at the network infrastructure of the communication system 10.
- the determiner 42 determines whether the communication session formed between the wireless host 14 and an Internet host 12 has ended abnormally. The determination is made, in one embodiment, by determining whether communication signals have been received from the wireless communication station 18 within a selected time period. If no communications have been received from the wireless communication station within the selected time period, the communication session is determined to have ended abnormally.
- the switching center 28 further includes an address list 46 containing a list of, here IP, address which can be allocated and assigned to identify a wireless host.
- IP internet protocol
- a half-opened TCP connection remains. That is to say, even though the communication session is terminated, the Internet host is unaware of the termination and continues to send packet-data to the wireless host. Operation of an embodiment of the present invention prevents reallocation and reassignment of the temporary IP address used to address the wireless host. Misrouting of the packet-data generated during a half-opened TCP connection to another wireless host is thereby prevented.
- a TCP/IP connection is formed, in conventional manner, between the Internet host 12 and the wireless communication station 18.
- a communication session between the Internet host 12 and the wireless host 14 is thereafter effectuated.
- an available IP address selected from the address list 46 is assigned to the wireless host 14.
- Packet-data to be terminated at the wireless host 14 is addressed with the IP address used to identify the wireless host.
- a half-open TCP connection remains.
- packet-data continues to be addressed with the IP address of the wireless host 14 by the host 12.
- the determiner 42 of the switching center 28 instructs the address list updater 48 to update the address list 46 with an indication that the IP address no longer identifies the wireless host 14 but indicates the IP address to be unavailable to be reallocated and reassigned to identify another wireless host.
- the updater 48 updates the address list 46 to "mark as free” the address but unavailable for reallocation and reassignment.
- packet-data addressed with the IP address, previously used to identify the wireless host 14 is received at the switching center 28, the data packet is discarded. Because the IP address is made unavailable for reallocation and reassignment to identify another wireless host, misrouting of the packet of data to a newly-identified wireless host is avoided.
- the time period selected during which the determination is made whether the communication signals have been received is situation- dependent. For instance, if radio contact is lost during downlink packet transmission, i.e., from the network to the wireless host, a determination is made of a communication session termination after a relatively short time period, e.g., two minutes. If there is no ongoing data exchange between two hosts, the determination is made after a longer time period, e.g., only subsequent to a time period corresponding to a complete registration period without registration by a wireless host.
- FIG. 2 illustrates a time-line, shown generally at 50, which shows operation of an embodiment of the present invention in a packet-data mobile communication system.
- a connection here represented by 52, is formed between a wireless host 14 and the Internet host 12. Communication of packet-data between the Internet host 12 and the wireless host 14 is possible while the connection 52 is maintained between the hosts 12 and 14.
- the X-marking 54 indicates a broken connection which causes abnormal termination of the communication session by the wireless host 14.
- Existence of the broken connection is determined by the packet-data mobile switching center 28 when the communication session times out, indicated at time 56.
- the communication session times out a selected time period, here indicated by the arrow 58 subsequent to the formation of the broken connection 54.
- the session times out when a determination is made if the connection 52 between the hosts 12 and 14 is determined to have been broken, resulting in an abnormal communication session termination.
- a communication session is determined to have ended abnormally if no communication signals generated by the wireless host 14 are detected at the switching center 28 for a time period indicated by the arrow 58.
- the address list 46 maintained at the switching center 28 is updated to indicate that the IP address used to identify the wireless host 14 is free but is unavailable to be reallocated and reassigned to identify another wireless host for at least a selected time period.
- a TCP probe segment is exemplary of an IP packet that might be sent by the Internet host 12 to the wireless host 14.
- a TCP probe segment is transmitted when a so-called, "keepalive timer" has run out at the Internet host.
- a "keepalive packet” is sent after two hours of inactivity of communications.
- a TCP packet is sent ten times every seventy-five seconds before the connection between the hosts 12 and 14 is terminated normally.
- the time period during which the IP address is inaccessible and not permitted to be reallocated and reassigned to identify another wireless host corresponds to this time period, Viz., a time period of two hours and fifteen minutes (2 hours + 10 x 75 seconds).
- Figure 3 illustrates a sequence diagram, shown generally at 70, showing signaling during operation of the communication system 10 when the wireless host 14 initiates a request by way of the mobile terminal 16 to transmit packets of data to the Internet host 12.
- the sequence diagram 70 illustrates signalling to and from the wireless communication station 18 of which the wireless host 14 and mobile terminal 16 form portions.
- a packet communication request (PCR) 76, generated by the wireless host 14, is provided to the mobile terminal 16, transmitted over a radio link, and provided to the switching center 28 of a wireless network.
- PCR packet communication request
- authentication procedures here indicated by an authentication request 78 and an authentication response 82, are carried out.
- an IP address is allocated and assigned to the wireless host 14, indicated by the line 86 extending back to the wireless communication station 18.
- the Internet host with which a communication session is requested, is informed, indicated by the line 88, of the IP address assigned to the wireless host.
- a connection 92 is formed between the hosts 12 and 14.
- a break in the connection 92 here indicated by the X-marking 94, results in a determination of an abnormal communication session termination, such as described previously.
- the IP address used to identify the wireless host is marked as free in the IP address list, but unavailable to be reallocated and reassigned to identify another host.
- FIG. 4 illustrates the address list 46 maintained at the switching center 28.
- the address list includes a listing of temporary IP addresses that are marked free, viz., not being used to identify a wireless host. Indexed against the addresses is an indication of the availability of the address to be allocated and assigned to identify a wireless host. If the IP address is unavailable to be allocated and assigned to identify a wireless host, for the reasons noted above, the unavailability of the address is so-indicated.
- the address list 26 is updated, such as by the address list updater 48 (shown in Figure 1) so that the address can subsequently be allocated and assigned to identify another host during another communication session.
- Figure 5 illustrates a method, shown generally at 10, of an embodiment of the present invention.
- the method 110 is operable in a packet-data communication system, such as the system 10 shown previously in Figure 1.
- the method 110 is carried out, for instance, through the execution of algorithms by a processing device forming a portion of a packet-data mobile switching center.
- a communication session is formed between two host devices, such as the host device 12 and the wireless host 14, shown in Figure 1. Once the communication session is formed, packet-data can be transmitted between the hosts, in conventional manner.
- a timer is started. Thereafter, and as indicated by the decision block 116, a determination is made as to whether communication signals are being received from the wireless communication station of which the wireless host forms a portion. If so, the yes branch is taken to the decision block 118 whereat a determination is made as to whether a log-out has been requested.
- the yes branch is taken to the block 122, and normal log-out procedures are carried-out. If a log-out request, i.e., a normal communication session termination, has not been generated, the no branch is taken from the decision block 118 to the block
- the no branch is taken to the decision block 128.
- a determination is made as to whether the timer started at the block 114 has timed-out. If not, the no branch is taken back to the decision block 116. If, conversely, the timer has timed-out, the yes branch is taken from the decision block 128 to the block 132 whereat an IP address list is updated. The IP address list is updated to indicate that the IP address, previously used to identify the wireless host is free but is unavailable for a selected time period.
- the decision block 142 a determination is made as to whether the time period during which the marked- free IP address is unavailable has expired. The no branch from the decision block 136 is also taken to the decision block 142. If the time period has not expired, the no branch is taken from the decision block 142 back to the decision block 136. Otherwise, the yes branch is taken to the block 144 whereat the IP address list is updated to indicate that the IP address is once again available for reallocation and reassignment to identify another host during another communication session.
- misrouting of data subsequent to an abnormal termination of a communication session by a wireless host is avoided.
- the IP address, used to identify the wireless host is marked as unavailable for reallocation and reassignment to identify another host during another communication session for at least a selected time period.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002306122A CA2306122C (en) | 1997-10-16 | 1998-10-09 | Method and apparatus for preventing misrouting of data in a radio communication system |
GB0009108A GB2346515B (en) | 1997-10-16 | 1998-10-09 | Method and apparatus for preventing misrouting of data in a radio communication system |
JP2000517565A JP4050462B2 (en) | 1997-10-16 | 1998-10-09 | Method and apparatus for preventing data routing error in wireless communication system |
AU95624/98A AU758428B2 (en) | 1997-10-16 | 1998-10-09 | Method and apparatus for preventing misrouting of data in a radio communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08/951,966 | 1997-10-16 | ||
US08/951,966 US6246670B1 (en) | 1997-10-16 | 1997-10-16 | Method and apparatus for preventing misrouting of data in a radio communication system |
Publications (1)
Publication Number | Publication Date |
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WO1999021379A1 true WO1999021379A1 (en) | 1999-04-29 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/SE1998/001823 WO1999021379A1 (en) | 1997-10-16 | 1998-10-09 | Method and apparatus for preventing misrouting of data in a radio communication system |
Country Status (6)
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US (1) | US6246670B1 (en) |
JP (1) | JP4050462B2 (en) |
AU (1) | AU758428B2 (en) |
CA (1) | CA2306122C (en) |
GB (1) | GB2346515B (en) |
WO (1) | WO1999021379A1 (en) |
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WO2000021254A2 (en) * | 1998-10-06 | 2000-04-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for communicating data packets from an external packet network to a mobile radio station |
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US6469998B1 (en) | 1998-10-06 | 2002-10-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for communicating data packets from an external packet network to a mobile radio station |
EP1052824A2 (en) * | 1999-05-14 | 2000-11-15 | Mitsubishi Materials Corporation | Radio server system |
EP1052824A3 (en) * | 1999-05-14 | 2004-08-04 | Mitsubishi Materials Corporation | Radio server system |
WO2001011904A1 (en) * | 1999-08-10 | 2001-02-15 | Nokia Corporation | Ip address allocation in a mobile communications system |
EP1944947A1 (en) * | 2004-05-27 | 2008-07-16 | Telefonaktiebolaget LM Ericsson (publ) | Arrangement and method for allocationof address information |
US7925787B2 (en) | 2004-05-27 | 2011-04-12 | Telefonaktiebolaget L M Ericsson (Publ) | Arrangement and method for delayed re-allocation of addresses |
US11909719B1 (en) * | 2021-11-24 | 2024-02-20 | Amazon Technologies, Inc. | Managing the allocations and assignments of internet protocol (IP) addresses for computing resource networks |
Also Published As
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GB2346515A (en) | 2000-08-09 |
CA2306122C (en) | 2010-02-02 |
CA2306122A1 (en) | 1999-04-29 |
GB2346515B (en) | 2002-12-04 |
US6246670B1 (en) | 2001-06-12 |
JP4050462B2 (en) | 2008-02-20 |
JP2001521350A (en) | 2001-11-06 |
GB0009108D0 (en) | 2000-05-31 |
AU9562498A (en) | 1999-05-10 |
AU758428B2 (en) | 2003-03-20 |
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