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WO2002037772A1 - Systeme de communication de donnees par paquets, procede de commande correspondant et systeme de communication radio mobile - Google Patents

Systeme de communication de donnees par paquets, procede de commande correspondant et systeme de communication radio mobile Download PDF

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Publication number
WO2002037772A1
WO2002037772A1 PCT/JP2001/009687 JP0109687W WO0237772A1 WO 2002037772 A1 WO2002037772 A1 WO 2002037772A1 JP 0109687 W JP0109687 W JP 0109687W WO 0237772 A1 WO0237772 A1 WO 0237772A1
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WO
WIPO (PCT)
Prior art keywords
communication
packet
terminal
channel
subscriber terminal
Prior art date
Application number
PCT/JP2001/009687
Other languages
English (en)
Inventor
Johnson Oyama
Ina Widegren
Brian Williams
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU2002211016A priority Critical patent/AU2002211016A1/en
Publication of WO2002037772A1 publication Critical patent/WO2002037772A1/fr

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Classifications

    • 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
    • H04L61/35—Network arrangements, protocols or services for addressing or naming involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

Definitions

  • the present invention relates to a packet communication system and control method thereof, and more particularly, to a packet communication system and control method thereof using a mobile radio communication terminal.
  • a communication channel is assigned to each call and the assigned call occupies the channel irrespective of whether a conversation is actually engaged or not (irrespective of whether there is an effective voice signal or not) .
  • these mobile radio communication terminals have acquired a capability other than voice communications, that is, data communications, packet communications, in which data is transferred in packets to effectively use data communication channels, came into use.
  • voice communications that is, data communications
  • packet communications in which data is transferred in packets to effectively use data communication channels
  • most of mobile radio communication terminals currently in use have not only a conventional voice communication function but also a data communication function using packet communication.
  • mobile radio communication have been drastically spreading all over the world, there have also been growing problems such as shortage of radio resources and incompatibility between mobile radio communication systems being operated under different communication standards. With the growing diffusion rate, a demand for applications as faster data communication terminals is also increasing.
  • the IMT-2000 is a next- generation mobile radio communication system standard and this is roughly divided into two; DS-CDMA system and MC-CDMA system, whose standardization is being carried out by standardization organizations called "3GPP" (third generation partnership project) and "3GPP2", respectively.
  • FIG. 6 illustrates a configuration example of a packet communication network section in a mobile radio communication system using a system formulated by the 3GPP.
  • This configuration is based on a radio packet network used in a GSM network, that is, so-called GPRS (General Packet Radio Service) system.
  • the packet communication network comprises a base station subsystem 2 that includes a radio base station (RBS) 21 and a radio network controller (RNC) 22 and a packet switching core network 3.
  • the base station subsystem 2 handles a radio connection and communication with a terminal (mobile station) 1 and is shared by a voice communication network, which is not shown.
  • the RNC 22 is actually connected to a plurality of RBSs 21, each RBS 21 exercising control related to a radio connection with the mobile station 1 that exists in own service area of the RBS 21.
  • the packet switching core network 3 includes an SGSN (Serving GPRS Service Node) 31 that corresponds to an MSC (mobile service switching center) in the voice communication network and GGSNs (Gateway GPRS Service Nodes) 33 to 36 that correspond to GMSCs (Gateway of MSCs) .
  • SGSN Serving GPRS Service Node
  • MSC mobile service switching center
  • GGSNs Gateway GPRS Service Nodes
  • GMSCs Gateway of MSCs
  • the subnetworks 41 to 44 are the packet networks established to provide certain services. For example, networks of Internet service providers (ISPs) that provide connection services to the Internet, as a packet data network 51 to 54, and to networks of banks having servers to provide so-called "mobile banking services" correspond to these subnetworks.
  • ISPs Internet service providers
  • Each of the subnetworks 41 to 44 has a CSCF (Call State Control Function) that controls calls and acquires an IP address of the other end of communication, etc. and DNS (Domain Name System) to acquire the corresponding IP address from a URL or an e-mail address.
  • CSCF Common State Control Function
  • DNS Domain Name System
  • the subnetworks 41 to 44 are further connected to packet data networks 51 to 54 via gateway apparatuses, which are not shown, but the packet data networks 51 to 54 need not always be connected.
  • the packet data networks 51 to 54 can also be connected to other networks.
  • all networks that carry out communication via GGSNs, that is, the subnetworks 41 to 44, packet data networks 51 to 54 and networks that are connected via these networks are treated as external packet networks.
  • the packet switching core network 3 also has a GGSN database (GGSNDB) 38 that stores the correspondence between APNs (Access Point Names) and GGSNs of the subnetworks 41 to 44 and an HLR (Home Location Register) 32 that stores service subscription information of users and positional information, etc.
  • GGSNDB GGSN database
  • HLR Home Location Register
  • the SGSN 31 performs location control, billing control and communication control, etc. of the users who use packet communication services.
  • the drawing shows only one base station subsystem 2 and one SGSN 31, but there is actually more than one base station subsystem and more than one SGSN.
  • FIG. 7 shows an excerpt of the connection between the mobile radio communication system and subnetwork 41 in FIG. 6.
  • the packet switching core network 3 is connected to different subnetworks via a plurality of geographically distant GGSNs 331 to 334 and the terminal 1 communicates with the other end of communication that exists on the subnetwork 41 or the packet data network 511 to 513 (further including networks connected in multiple stages via the packet data network 511 to 513) connected via the subnetwork 41, for example, a server 5111 that exists on the packet data network 511, via any one of the GGSNs 331 to 334. Connection between the subnetwork 41 and packet data network 511 to 513 is made via the corresponding gateway apparatus 414 to 416.
  • processing (attach) for carrying out a communication between the terminal 1 and SGSN 31 is performed (step S101) .
  • This processing includes confirmation processing to check whether the terminal 1 is registered in the network or not. This confirmation is carried out by the SGSN 31 by referencing the HLR 32 using, for example, the subscriber number of the terminal 1.
  • the terminal 1 sends a PDP context to establish a control signal (signaling) channel (step S102) .
  • the PDP context includes an APN (Access Point Name) and PDP address, etc.
  • the APN included in the PDP context for signaling channel setting is an APN that indicates connection to the CSCF 411.
  • the SGSN 31 Upon reception of this PDP context, the SGSN 31 inquires the GGSNDB 38 about the GGSN corresponding to the APN using the APN included in the PDP context (step S103) .
  • the GGSNDB 38 arbitrarily selects one GGSN (e.g., GGSN 331) from among the GGSNs 331 to 334 stored beforehand as the GGSN corresponding to the received APN, that is, the subnetwork 41 and returns the address thereof to the SGSN 31 (step S104) .
  • the SGSN 31 sends the PDP context for signaling channel setting to the specified GGSN 331 (step S105) .
  • the GGSN 331 performs predetermined processing and returns a response signal to the terminal 1 via the SGSN 31, and then a signaling channel between the GGSN 331 and the terminal 1 is established, making it possible to exchange a control signal between the terminal 1 and subnetwork 41.
  • the terminal 1 performs registration work with the CSCF 411 that exists on the subnetwork 41 by using the signaling channel (step S107), in order to decide address information necessary for communication between the terminal 1 and devices in the subnetwork 41.
  • the terminal 1 sends a connection request (INVITE message) including the other end of communication specification information to specify the other end of communication to provide a desired service (server 413) , for example, the e-mail address and URL, etc. to the CSCF 411 (step S108) .
  • the CSCF 411 inquires the DNS 412 using the other end of communication specification information included in the INVITE message, acquires the IP address of the server 413 and transfers the INVITE message to the server 413.
  • the server 413 accepts the connection request from the terminal 1, the server 413 sends back a response message including the own IP address via the signaling channel (step S109) .
  • the terminal 1 that has received this response message sends the channel setting request PDP context for data transmission including the APN and IP address of the server 413 to the SGSN 31 (step S110) .
  • the SGSN 31 inquires the GGSNDB 38 by using the APN included in the data transmission channel setting request message (step Sill) .
  • the GGSNDB 38 selects any one GGSN (e.g., GGSN
  • the SGSN 31 sends the PDP context for data channel setting to the specified GGSN 332 (step S113) and when a response signal from the GGSN 332 is sent back to the terminal 1 via the SGSN 31, a data transmission channel between the terminal 1 and GGSN 332 is established. Then, a data communication between the terminal 1 and the server 413 is carried out by using the GGSN 332 as a gateway.
  • the decision as to which GGSN is used from among a plurality of GGSNs assigned as the gateway for the subnetwork to be connected is made under such conditions as in a predetermined order, one of GGSNs available at that time, etc., and conditions related to communication quality such as the other end of communication, the quality of the communication path and length of the communication path, intentions of the service provider and the mobile radio communication system operator are not considered at all.
  • GGSNs assigned to the same subnetwork are geographically distant from each other and the distance of the communication path from the terminal to the server that provides services varies a great deal depending on the GGSN used, that condition is not considered and a communication may be performed through an unnecessarily long path. In this case, the communication quality may deteriorate or a great delay may be involved.
  • the quality and speed of the channel vary depending on the GGSN used, if the GGSN to be used is decided without considering these conditions, the GGSN that uses a slow channel may be selected even if the GGSN that uses a faster channel is available, which will result in inefficient data transmission. Furthermore, by rather taking advantage of this difference in channel quality, when the mobile communication system operator (telephone company, etc.) attempts to provide services such as discounting of communication fees to subscribers using channels with ordinary quality compared to using channels with high quality, the conventional connection procedure cannot support such services.
  • the present invention has been achieved by taking into account the points described above and it is an object of the present invention to provide a packet communication system and a control method thereof capable of selecting a GGSN used during packet communication considering the other end of communication, the quality of the channel and other arbitrarily preset conditions when the terminal issues a packet communication request.
  • a subject of the present invention consists in a packet communication system equipped with a subscriber terminal, a packet switching network that switches packet data transmitted/received by this subscriber terminal and a plurality of gateway apparatuses that enables this packet switching network to communicate with an external packet network, which provides the subscriber terminal with a mutual packet communication with a terminal at the other end of communication that exists on the external packet network, characterized by including address information acquiring means for acquiring address information of the terminal at the other end of communication from a packet communication request signal received from the subscriber terminal and channel setting means for selecting one specified gateway apparatus from the plurality of gateway apparatuses based on the address information of the terminal at the other end of communication and setting a channel to/from the subscriber terminal.
  • another subject of the present invention consists in a packet communication system equipped with a subscriber terminal, a packet switching network that switches packet data transmitted/received by this subscriber terminal and a plurality of gateway apparatuses that enables the packet switching network to communicate with an external packet network, which provides the subscriber terminal with a mutual packet communication with a terminal at the other end of communication that exists on the external packet network, characterized by including address information extracting means for extracting address information of the terminal at the other end of communication from a response message sent back to the subscriber terminal from the terminal at the other end of communication; channel setting means for selecting one specified gateway apparatus from the plurality of gateway apparatuses based on the address information of the terminal at the other end of communication and setting a channel to/from the subscriber terminal.
  • another subject of the present invention consists in a mobile radio communication system equipped with the packet communication system of the present invention. Furthermore, another subject of the present invention consists in a control method for a packet communication system equipped with a subscriber terminal, a packet switching network that switches packet data transmitted/received by this subscriber terminal and a plurality of gateway apparatuses that enables the packet switching network to communicate with an external packet network, which provides the subscriber terminal with a mutual packet communication with a terminal at the other end of communication that exists on the external packet network, characterized by including an address information acquiring step of acquiring address information of the terminal at the other end of communication from a packet communication request signal received from the subscriber terminal and a channel setting step of selecting one specified gateway apparatus from the plurality of gateway apparatuses based on the address information of the terminal at the other end of communication and setting a channel to/from the subscriber terminal.
  • another subject of the present invention consists in a control method for a packet communication system equipped with a subscriber terminal, a packet switching network that switches packet data transmitted/received by this subscriber terminal and a plurality of gateway apparatuses that enables the packet switching network to communicate with an external packet network, which provides the subscriber terminal with a mutual packet communication with a terminal at the other end of communication that exists on the external packet network, characterized by including an address information extracting step of extracting address information of the terminal at the other end of communication from a response message sent back to the subscriber terminal from the terminal at the other end of communication and a channel setting step of selecting one specified gateway apparatus from the plurality of gateway apparatuses based on the address information of the terminal at the other end of communication and setting a channel to/from the subscriber terminal.
  • FIG. 1 illustrates a configuration example of a packet communication system according to an embodiment of the present invention
  • FIG. 2 shows a detailed view of a part of FIG. 1
  • FIG. 3 illustrates an example of policy information registered in a policy DB
  • FIG. 4 is a sequence chart showing a connection procedure in a first embodiment
  • FIG. 5 is a sequence chart showing a connection procedure in a second embodiment
  • FIG. 6 is a drawing to explain a configuration example of a conventional packet communication system
  • FIG. 7 shows a detailed view of a part of FIG. 6; and FIG. 8 is a sequence chart showing a conventional connection procedure.
  • FIG. 1 is a block diagram showing a packet communication network part of a mobile radio communication system as an example of a packet communication system according to an embodiment of the present invention.
  • the packet communication network in FIG. 1 has the same configuration except that a policy DB 39 has newly been provided.
  • FIG. 2 shows a detailed configuration of the connection with the subnetwork 41, which corresponds to the conventional configuration in FIG. 7.
  • the packet switching core network 3 is basically configured by a combination of a known packet switch such as an ATM switch and computer devices making up the SGSN and GGSN.
  • the policy DB 39 newly provided in this embodiment is a database used to store policy information to determine the GGSN used to perform a packet communication with the subnetwork considering predetermined conditions and, in this embodiment, stores a table (FIG. 3) to identify an optimal GGSN based on the IP address of the connection target and information necessary to determine the table, for example, topology information (information on the network configuration (geographical location of the server, quality of the communication path in the network, speed, etc.)) of the subnetwork 41 to 44.
  • a table FIG. 3
  • a table shown in FIG. 3 is created based on the topology information of the subnetwork and is created to make it possible to select a GGSN connected to the terminal of the connection target through the shortest path using the IP address of the connection target as a keyword.
  • This example shows a case where the GGSN to be used is unconditionally determined by the IP address of the target, but in the case where more detailed control is performed for every subscriber (for example, in the case where billing control, etc. is performed for every subscriber according to the channel quality, etc.), it is also possible to further combine information that can identify the terminal such as subscriber number, etc. It is also possible to determine policy information by arbitrarily combining arbitrary conditions such as changing the GGSN to be selected according to the date/time, day of the week, etc. on which the service is provided.
  • topology information of the subnetwork 41 to 44 (or packet data network connected via the subnetwork 41 to 44) is necessary.
  • the operator of the mobile radio communication system must receive the topology information of each network from the subnetwork 41 to 44. This is because the information on the contents of the packet switching core network 3 such as the geographical location, channel quality and path of the GGSN corresponding to the subnetwork, configuration and communication quality of the subnetwork (or packet data network) and the topology information, which is information of the geographical location, etc.
  • the topology information is acquired from the subnetwork 41 beforehand, the GGSN selection policy is determined based on the topology information and the policy information based on the determined selection policy is registered in the policy DB 39.
  • connection procedure according to this embodiment when a service supply request is issued from the terminal 1 will be explained by using the sequence chart shown in FIG. 4.
  • FIG. 4 it is assumed that a service requested from the terminal is provided by the server 413 that exists on the subnetwork 41.
  • FIG. 4 the same processing procedure as that in FIG. 8 above will be assigned the same reference numerals as those in FIG. 8 and repetition of the same explanations will be avoided.
  • the topology information is registered or updated in the policy DB 39 (step S201) .
  • the policy information is determined according to a policy that a GGSN is selected so that a connection with the server 413 on the subnetwork 41 is made through the shortest path
  • step S101 to step S109 The procedure after the establishment of a signaling channel with any one of the GGSNs 331 to 334 assigned as the gateway with the subnetwork 41 at the request of the subscriber terminal 1 of the mobile radio communication system, transmission of an INVITE message to the server 413 using this signaling channel until reception of a response message including the IP address of the server 413 (step S101 to step S109) is the same as the conventional procedure explained by using FIG. 8.
  • the terminal 1 sends a data channel setting PDP context including the IP address of the server 413 acquired in step S109 (step S110) .
  • the SGSN 31 acquires the IP address of the other end of communication included in the received PDP context and inquires (searches) the policy DB 39 (step S116) .
  • the policy DB 39 selects a GGSN (suppose GGSN 332) to be used to connect to the inquired IP address from the correspondence table shown in FIG. 3 and notifies the address of the selected GGSN (step S117) .
  • the SGSN 31 sends the data channel setting PDP context to the GGSN 332 specified from the policy DB 39 (step S118) .
  • the GGSN 332 sends back a response signal to the terminal 1 and the terminal 1 receives this response signal, a data channel is established between the terminal 1 and GGSN 332 (step S114).
  • a packet communication is carried out between the terminal 1 and server 413 via the GGSN 332 (step S115) .
  • the policy information registered in the policy DB 39 is based on the policy that a connection should be made through the shortest path, the packet communication path between the terminal 1 and server 413 is shorter than the case where another GGSN is used, allowing a communication with an optimal delay characteristic, [second Embodiment]
  • the IP address declared from the terminal 1 is used to select a GGSN based on the policy.
  • this method is not available for a system in which the IP address is not declared from the terminal 1.
  • a GGSN is selected based on a declaration from the terminal 1, it is not possible to exclude a possibility that the declaration may be tampered.
  • a possible example of an illegal declaration is that after an INVITE message is sent to declare a packet communication with a desired terminal (e.g., server 413), the communication destination may be illegally changed to another server in the stage of data channel setting.
  • a desired terminal e.g., server 413
  • the communication destination may be illegally changed to another server in the stage of data channel setting.
  • the subscriber of the terminal 1 has a contract of receiving a discount of the packet communication fee on condition that the subscriber will use services provided by the serve 413
  • the illegal declaration of the IP address as described above will cause the discounted communication fee to be applied even when services provided by other servers are used.
  • this embodiment allows the network side to acquire the IP address of the connection target, making it possible to select an optimal GGSN based on the policy information even if the IP address of the other end of communication is not declared from the terminal 1 at the time of data channel setting or there is a possibility of the terminal 1 carrying out an illegal communication.
  • this embodiment is characterized in that a GGSN used to set a data channel is determined by using the IP address of the connection target acquired at a node that exists on the path between the connection target (server 413) and the terminal 1. Any node can be used to acquire the IP address of the connection target as far as such the node can communicate with the policy DB 39.
  • the following explanation will describe a case where the CSCF 411 acquires the IP address.
  • a signaling channel is established between the target server and the terminal 1 and the target server accepts a connection request, a response message including the IP address of the target server is sent back to the terminal 1 (step S109) . Since the signaling channel is formed via the CSCF 411, the CSCF 411 can acquire the IP address of the target server 413 included in the response message.
  • the CSCF 411 acquires the IP address of the target server (server 413) and the destination of the response message, that is, the address of the terminal 1 from this response message.
  • the CSCF 411 then notifies the acquired IP address of the server 413 and the address of the terminal 1 to the policy DB 39 (step S119) .
  • the policy DB 39 stores the address of the terminal 1 in a one-to-one correspondence with the IP address of the server 41 notified from the CSCF 411.
  • the terminal 1 that has received the response message from the target server sends a data channel setting PDP context to the SGSN 31 (step S110) .
  • the SGSN 31 extracts* the address of the terminal 1 included in the received PDP context and inquires the policy DB 39 (step S121) .
  • the policy DB 39 decides from the address of the terminal 1 that a data channel setting request for a communication with the server 413 has been issued, reads the IP address of the server 413 from the information stored above and decides a GGSN to be used based on the IP address similarly as the first embodiment. Then, the policy DB 39 notifies to the
  • the policy DB 39 decides that the operation of the terminal 1 is illegal and cancels the session with the terminal 1.
  • the SGSN 31 sends the data channel setting PDP context to the notified GGSN 322 (step S123) and sets a data channel between GGSN 322 and terminal 1.
  • a packet communication is performed between the terminal 1 and the server 413 of the subnetwork 41.
  • this embodiment selects a GGSN based on the IP address of the other end of communication acquired on the network side, it is possible to select an optimal GGSN for the system even in the case of a system in which the terminal 1 declares no IP address or in the case where the terminal 1 declares an illegal IP address.
  • the above-described embodiments describe the case where a signaling channel and data channel can use independent GGSNs, but there can also be a system with a restriction that the GGSN used when the signaling channel is set must be used to set the data channel.
  • the terminal 1 declares the IP address of the other end of communication when the signaling channel is set, for example, when the IP address of the server that provides services to be used is already registered in the terminal 1, the data channels to be set thereafter can be set by using an optimal GGSN by applying the method of the first embodiment.
  • inquiring the policy DB 39 from the SGSN 31 and setting the signaling channel by using the notified GGSN makes it possible to use the same GGSN even if a data channel setting request is issued thereafter, which results in a packet communication between the terminal 1 and target server using an optimal GGSN.
  • both GGSNDB 38 and policy DB 39 can be mounted on the same HDD.
  • the present invention can select an optimal gateway apparatus to be used during a packet communication considering the other end of communication, channel quality and other arbitrary preset conditions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de communication de données par paquets équipé d'une pluralité d'appareils de passerelle dotés d'une correspondance bi-univoque avec des réseaux externes, ledit système étant capable de sélectionner un appareil de passerelles optimal utilisé pendant une communication de paquets en fonction de l'autre extrémité de la communication, de la qualité de canal et des autres conditions préétablies de manière arbitraire. On établit une correspondance bi-univoque entre une information d'adresse (par ex., une adresse IP) d'un terminal fournisseur de services qui existe sur un réseau externe et d'un appareil de passerelle optimal, en utilisant une information sur la topologie du réseau, telle qu'une information sur l'emplacement géographique du terminal à l'autre extrémité de la communication sur le réseau externe, et on stocke cette correspondance dans une base de données de police (39). On cherche cette base de données en utilisant l'adresse IP du terminal fournisseur de services déclaré à partir d'un terminal 1 ou acquis d'un côté du réseau. Puis, on établit un canal de communication par paquets entre l'appareil de passerelle obtenu suite à la recherche et le terminal 1.
PCT/JP2001/009687 2000-11-06 2001-11-06 Systeme de communication de donnees par paquets, procede de commande correspondant et systeme de communication radio mobile WO2002037772A1 (fr)

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CN100337414C (zh) * 2002-10-18 2007-09-12 华为技术有限公司 一种宽带码分多址系统中的服务质量协商方法
US7372838B2 (en) 2002-12-23 2008-05-13 Electronics And Telecommunications Research Institute GPRS (general packet radio service) system with multiple GGSNS (gateway GPRS supporting nodes) and method for selecting GGSN
WO2012086642A1 (fr) * 2010-12-20 2012-06-28 日本電気株式会社 Dispositif passerelle, système de communication et procédé de communication
US20140105216A1 (en) * 2012-10-17 2014-04-17 Verizon Patent And Licensing Inc. Network devices with feature peer network logic

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WO1999037103A1 (fr) * 1998-01-14 1999-07-22 Nokia Networks Oy Procede de commande d'acces pour systeme de telephonie mobile
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CN100337414C (zh) * 2002-10-18 2007-09-12 华为技术有限公司 一种宽带码分多址系统中的服务质量协商方法
US7372838B2 (en) 2002-12-23 2008-05-13 Electronics And Telecommunications Research Institute GPRS (general packet radio service) system with multiple GGSNS (gateway GPRS supporting nodes) and method for selecting GGSN
WO2012086642A1 (fr) * 2010-12-20 2012-06-28 日本電気株式会社 Dispositif passerelle, système de communication et procédé de communication
JP5617932B2 (ja) * 2010-12-20 2014-11-05 日本電気株式会社 ゲートウェイ装置と通信システムと方法
US20140105216A1 (en) * 2012-10-17 2014-04-17 Verizon Patent And Licensing Inc. Network devices with feature peer network logic
US9160797B2 (en) * 2012-10-17 2015-10-13 Verizon Patent And Licensing Inc. Network devices with feature peer network logic

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