WO2005074192A1 - Procede de collecte d'adresse de passerelle de donnees paquets (pdg) pour terminal utilisateur sur reseau local sans fil (wlan) - Google Patents
Procede de collecte d'adresse de passerelle de donnees paquets (pdg) pour terminal utilisateur sur reseau local sans fil (wlan) Download PDFInfo
- Publication number
- WO2005074192A1 WO2005074192A1 PCT/CN2005/000066 CN2005000066W WO2005074192A1 WO 2005074192 A1 WO2005074192 A1 WO 2005074192A1 CN 2005000066 W CN2005000066 W CN 2005000066W WO 2005074192 A1 WO2005074192 A1 WO 2005074192A1
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- WIPO (PCT)
- Prior art keywords
- user terminal
- pdg
- address
- service
- address information
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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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
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
-
- 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
- H04W84/12—WLAN [Wireless Local Area Networks]
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- 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
Definitions
- the present invention relates to the field of wireless access technology, and particularly to a method for a user terminal in a wireless local area network to obtain a packet data gateway (PDG) address.
- PGW packet data gateway
- Wireless local area networks can provide high-speed wireless data access in a small range, it is widely used.
- Wireless local area network includes a variety of different technologies.
- IEEE 802.11b which uses the 2.4GHz frequency band and has a maximum data transmission rate of 11Mbps.
- IEEE 802.11g and Bluetooth technologies are also used in this frequency band. Among them, the highest data transmission rate of 802.11g can reach 54Mbps.
- Other wireless LAN technologies such as IEEE 802.11a and ETSI BRAN Hiperlan2, use the 5GHz band, and the highest transmission rate can reach 54Mbps.
- IP Internet Protocol
- AP access point
- WLAN and various wireless mobile communication networks such as: Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, Time Division Duplex -Interworking of synchronous code division multiple access (TD-SCDMA) system and CDMA2000 system is becoming the focus of current research.
- GSM Global System for Mobile Communications
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- TD-SCDMA2000 Time Division Duplex -Interworking of synchronous code division multiple access
- 3GPP 3rd Generation Partnership Project
- user terminals can both access the network through WLAN It is connected to the Internet (Internet) and the corporate intranet (Intranet), and can also be connected to the home network of the 3GPP system or the access network of the 3GPP system via a WLAN access network.
- FIG. 1 shows the schematic diagram of the networking structure between the WLAN system and the 3GPP system in the case of roaming.
- a WLAN user terminal roams and connects, it is connected to the 3GPP access network via the WLAN access network.
- entities in the 3GPP access network are interconnected with corresponding entities in the 3GPP home network, such as: 3GPP authentication authorization in the 3GPP access network Accounting (AAA) proxy and 3GPP authentication authorization accounting (AAA) server in 3GPP home network; Wireless Local Area Network Access Gateway (WAG) in 3GPP access network and Packet Data Gateway (PDG) in 3GPP home network, etc. Therefore, it is achieved that the WLAN user terminal accesses the 3GPP home network.
- the two-dot chain line in the figure is the 3GPP packet switching (PS) domain service, that is, the Scenario3 service in the 3GPP network.
- PS packet switching
- FIG. 2 shows a schematic diagram of the networking structure of the WLAN system and the 3GPP system in the non-roaming situation.
- a WLAN user terminal accesses locally, it is directly connected to the 3GPP home network via the WLAN access network.
- the two-dot chain line in the figure is the 3GPP packet switching (PS) domain service, that is, the Scenario3 service in the 3GPP home network.
- PS packet switching
- the 3GPP system in the 3GPP system, it mainly includes a Home Subscriber Subscriber Server (HSS) / Home Location Register (HLR), a 3GPPAAA server, a 3GPPAAA proxy, a WAG, a packet data gateway, and a charging gateway (CGw) / Charging Information Collection System (CCF) and Online Charging System (OCS).
- HSS Home Subscriber Subscriber Server
- HLR Home Location Register
- 3GPPAAA server 3GPPAAA proxy
- WAG packet data gateway
- CGw Charging Information Collection System
- OCS Online Charging System
- the user terminal, the WLAN access network, and all entities of the 3GPP system together constitute a 3GPP-WLAN interactive network, and the 3GPP-WLAN interactive network can serve as a wireless local area network service system.
- the 3GPP AAA server is responsible for user authentication, authorization, and charging, and collects and transmits the charging information sent by the WLAN access network to the charging system;
- the packet data gateway (PDG) is responsible for accessing user data from the WLAN
- the network is transmitted to the 3GPP network or other packet networks.
- the charging system mainly receives and records user charging information from the network.
- OCS indicates the network cycle according to the online charging user's fee situation. Send online cost information, and perform statistics and control.
- the WLAN user terminal In a non-roaming situation, when the WLAN user terminal wishes to directly access the Internet / Intranet, it directly accesses the Internet / Intranet through the WLAN access network. If the WLAN user terminal also wants to access the 3GPP packet switching (PS) domain service, it can further apply for a Scenario3 service from the 3GPP home network.
- PS packet switching
- the WLAN user terminal first provides a public domain name resolution server (DNS) with a service access point name (W-APN) identifier of the service that it needs.
- DNS is a public domain name resolution device.
- the DNS that accepts the application is based on the W-
- the APN identification resolves the IP address of the corresponding PDG or PDGs and returns it to the WLAN terminal user.
- the WLAN terminal user uses one of the IP addresses obtained from the DNS to send a tunnel connection request to the PDG corresponding to the IP address.
- the PDG that received the user terminal connection request contacts the AS, and the AS completes the service identity of the user terminal. After checking, authorization, etc., the PDG that received the connection request from the user terminal establishes a tunnel connection with the WLAN terminal user that sent the request, thereby implementing the Scenario3 service.
- the user terminal In the case of roaming, when a WLAN user terminal wants to access the Internet / Intranet, the user terminal applies for access to the Internet / Intranet from the 3GPP home network through the 3GPP access network. After the access authentication is passed, the user terminal can directly connect through the WLAN access network. Access to the Internet / Intranet. If the user terminal wishes to apply for the Scenario3 service, the application method is:
- the WLAN user terminal first provides a public DNS with the W-APN identification of the service it needs.
- the DNS that accepts the application resolves the corresponding IP address of one or more PDGs according to the W-APN identification provided by the user and returns it to the WLAN terminal user.
- the WLAN terminal user uses one of the IP addresses obtained from the DNS to send a request to establish a tunnel connection to the PDG corresponding to the IP address, and the PDG receiving the user terminal connection request and the network
- the AS of the network contacts the AS of the home network where the WLAN user terminal is located.
- the user terminal accepts the connection request of the user terminal.
- the PDG establishes a tunnel connection with the WLAN end user who sends the request, thereby implementing the Scenario3 service.
- FIG. 3 shows the positional relationship between WLAN user terminals, public DNS, and 3GPP networks.
- the private DNS is located inside the 3GPP network, holds the address of the PDG in the 3GPP, and can contact the public DNS.
- Each PDG is connected to a service domain.
- Public DNS is completely public on the Internet.
- WLAN user terminals can access it at will, and they are required to resolve the PDG addresses required by the WLAN user terminal.
- a public DNS receives a request message for resolving a PDG address of a WLAN user terminal, it first performs resolution on the DNS. If it is resolved locally, it returns the required PDG address directly to the WLAN user terminal. If it is resolved, the private DNS in the 3GPP network is requested to be resolved, and then the result of the analysis from the private DNS is returned to the WLAN user terminal.
- the WLAN user terminal Since the WLAN user terminal does not belong to the 3GPP network, the WLAN user terminal does not know the private DNS address in the 3GPP network, that is, the WLAN user terminal cannot access the private DNS in the 3GPP network. Therefore, the above solution has the following problems:
- an object of the present invention is to provide a method for a user terminal in a wireless local area network to obtain a packet data gateway address, so as to prevent users from frequently analyzing PDG address information on a public DNS.
- a method for a user terminal to obtain a packet data gateway address in a wireless local area network includes the following steps:
- the user terminal sends a message requesting to obtain a PDG address different from the accessed service to the packet data gateway PDG that has established a tunnel connection with itself;
- the PDG After receiving the message described in step a, the PDG obtains address information corresponding to the user terminal requesting access service, and sends the address information to the user terminal;
- the user terminal obtains the required PDG address by using the received address information.
- the method for obtaining the address information corresponding to the user terminal requesting access service in step b is:
- the PDG receiving the message in step a performs local query according to the service requested by the user terminal, and obtains the request with the user terminal. Address information corresponding to the access service;
- the method for obtaining the required PDG address described in step c is: the user terminal directly obtains the required PDG address from the received information.
- the method for obtaining address information corresponding to the access service requested by the user terminal in step b is: receiving the PDG of the message in step a, obtaining the address of the private domain name resolution server DNS;
- the method for obtaining the required PDG address described in step c is: the user terminal directly requests the private DNS for resolution, and obtains the required PDG address from the analysis result of the private DNS.
- the method for obtaining the address information corresponding to the access service requested by the user terminal in step b is:
- the PDG receiving the message in step a requests the private DNS for resolution, and obtains the user and user information from the private DNS resolution result. Address information corresponding to the terminal requesting access to the service Since.
- the method for obtaining the required PDG address described in step c is: the user terminal directly obtains the required PDG address from the received information.
- the method for obtaining the address information corresponding to the access service requested by the user terminal in step b is: receiving the PDG message in step a, requesting the AAA server to perform authentication and authorization on the newly applied service of the user terminal, and authentication authorization After passing, the AAA server queries the address of the PDG that can support the newly applied service of the user terminal, and sends authorization information including the address of the queried PDG to the PDG described in step a.
- the PDG receives authorization from the AAA server.
- the address information corresponding to the access service requested by the user terminal is obtained in the message.
- the method for obtaining the required PDG address in step c is: the user terminal directly obtains the required PDG address from the received information.
- the method further includes:
- the private DNS address is sent to the user terminal; the user terminal directly requests the private DNS for resolution, and obtains the required PDG address from the resolution result of the private DNS; or,
- the PDG After receiving the message described in step a, the PDG requests the private DNS for resolution, and obtains the address information corresponding to the user terminal requesting the access service from the private DNS analysis result, and forwards the address information to the user terminal; the user terminal receives from Obtain the required PDG address directly from the information; or
- the PDG After receiving the message described in step a, the PDG requests the AAA server to authenticate and authorize the newly applied service of the user terminal. After the authentication and authorization is passed, the AAA server queries the address of the PDG that can support the newly applied service of the user terminal, and requests In step a, the PDG sends authorization information including the queried PDG address, and the PDG obtains address information corresponding to the user terminal requesting access service from the authorization message from the AAA server; the user terminal The terminal directly obtains the required PDG address from the received information.
- the method further comprises: the user terminal determines the content of the address information obtained from the PDG, and if it is a private DNS address, directly saves it; if it is a PDG address, it saves the PDG address and the access service requested by the user terminal. Correspondence.
- the method further includes: presetting a storage time of a correspondence relationship between the PDG address and the access service requested by the user terminal, the storage time being a time preset by the user or a default time of the system.
- the saving time of the information is re-initialized; if the information saved by the user terminal has not been used within the saving time, the information is deleted .
- the method further includes: when the user terminal requests access different from an existing service, first determining whether there is address information corresponding to the requested access service locally, and if there is, directly contacting the address information, Otherwise, it is judged whether there is an established tunnel connection currently, and if so, step a is performed, otherwise, directly contact the public DNS and perform processing according to the existing process.
- the method further includes: when the user terminal locally fails to connect with the address information corresponding to the requested access service, and a tunnel connection currently exists, then step a is performed again, and the saved request is updated. Address information corresponding to the access service; When the user terminal fails to connect with the address information corresponding to the requested access service and the tunnel connection does not currently exist, the user terminal will re-analyze to the public DNS for normal processing. And update the saved address information corresponding to the requested access service.
- the service requested by the user terminal for access is identified by a wireless local area network service access point name W-APN.
- the user terminal uses the existing tunnel resources to query its required PDG address, thereby preventing the user from frequently parsing PDG address information to the public DNS, and also Reduced the possibility of resolving failures caused by multiple use of public DNS within the public network.
- the user terminal also saves the address information obtained through the tunnel resource, so that it can be applied for the next access, which further saves network resources and improves query efficiency.
- Figure 1 shows the schematic diagram of the networking structure of interworking between the WLAN system and the 3GPP system in the case of roaming
- Figure 2 shows a schematic diagram of the networking structure of the interworking between the WLAN system and the 3GPP system in a non-roaming situation
- Figure 3 shows a schematic diagram of the positional relationship among WLAN user terminals, public DNS, and 3GPP networks
- FIG. 4 shows a flowchart of applying the first embodiment of the present invention
- FIG. 5 shows a flowchart of applying the second embodiment of the present invention
- FIG. 6 shows a flowchart of applying the third embodiment of the present invention. Mode of Carrying Out the Invention
- the idea of the present invention is: the user terminal sends a request to the PDG that has established a tunnel connection with itself to obtain a message that supports a PDG address different from the service that has been accessed; the PDG that receives the request message obtains the access request from the user terminal by query The address information corresponding to the service is sent to the user terminal; the user terminal uses the received address information to obtain the required PDG address.
- FIG. 4 shows a flowchart of applying the first embodiment of the present invention.
- the 3GPP network allows sending its internal private DNS address to the WLAN user terminal.
- Step 401 When a WLAN user terminal accesses a service of the 3GPP packet domain for the first time, it first resolves the PDG address of the requested service to the public DNS, and then selects a PDG address from the PDG addresses resolved by the public DNS, that is, selects a PDG. ; In this embodiment, it is assumed that PDG1 is selected;
- Step 402 The WLAN user terminal contacts the PDG1.
- the PDG1 requests the AAA server to complete the authentication and authorization of the user, and then establishes a service communication tunnel with the WLAN user terminal. Then, the WLAN user terminal uses the established tunnel to communicate with the PDG1.
- Step 403 If the WLAN user terminal needs to request access to a new 3GPP packet domain service, that is, if it needs a different PDG address, then directly send a message requesting the PDG address to PDG1, that is, to provide PDG1 with the service it needs.
- Service access point name (W-APN) identification in this embodiment, it is assumed that the PDG corresponding to the user requesting access to the service is PDG2;
- step 404 PDG1 first determines whether the PDG address corresponding to the service requested by the user is stored locally. If so, the PDG1 directly returns the PDG address required by the user, that is, the address of PDG2. Otherwise, PDG1 will privately connect to itself in 3GPP. The DNS address is returned to the WLAN user terminal;
- step 405 the WLAN user terminal saves the address information returned by PDG1, that is, if the address information of PDG2 is returned, then the correspondence relationship between the address of PDG2 and the 3GPP packet domain service to be accessed by the WLAN user terminal is stored, and then step 408 is performed. Is the private DNS address information, and after the private DNS address is saved, step 406 is performed; step 406, the WLAN user terminal directly sends a request to the private DNS to resolve the PDG address of the 3GPP packet domain service to be accessed;
- Step 407 The private DNS that received the request message is analyzed, and the result of the analysis is returned to the WLAN user terminal, that is, the address of the PDG2 is returned to the WLAN user terminal.
- Step 408 the WLAN user terminal contacts the PDG2, and the PDG2 requests AAA. After the server completes the authentication and authorization of the user, a tunnel for service communication is established with the WLAN user terminal, and then the WLAN user terminal communicates with PDG2 by using the established tunnel.
- the WLAN user terminal When the WLAN user terminal needs a PDG address different from the above 3GPP packet domain service again, it first searches in the local list. If a PDG address supporting the service is found, it will directly contact the PDG. If it is not found, Then, the WLAN user terminal queries whether the 3GPP private DNS address is stored locally. If there is, it directly resolves to the private DNS. Otherwise, it determines whether there is a tunnel connection currently. If so, the tunnel is used and this embodiment is applied. The provided method is used for querying, and if there is currently no tunnel connection, the WLAN user terminal then goes to the public DNS for resolution.
- FIG. 5 shows a flowchart of applying the second embodiment of the present invention.
- 3GPP 3GPP
- Step 501 When a WLAN user terminal accesses a service of the 3GPP packet domain for the first time, it first resolves the PDG address of the requested service to the public DNS, and then selects a PDG address from the PDG addresses resolved by the public DNS, that is, selects a PDG;
- ⁇ ⁇ is set to select PDG1;
- Step 502 The WLAN user terminal contacts PDG1.
- the PDG1 requests the AAA server to complete the authentication and authorization of the user, and then establishes a service communication tunnel with the WLAN user terminal. Then, the WLAN user terminal uses the established tunnel to communicate with PDG1.
- Step 503 If the WLAN user terminal needs to request access to a new 3GPP packet domain service, that is, if it needs a different PDG address, then directly send a message requesting the PDG address to PDG1, that is, to provide PDG1 with the service it needs.
- Service access point name (W-APN) identification in this embodiment, it is assumed that the PDG corresponding to the user requesting access to the service is PDG2;
- Step 504 PDG1 first determines whether a PDG address corresponding to the service requested by the user is stored locally. If so, step 506 is performed directly; otherwise, PDG1 sends the WLAN user The request message of the terminal is forwarded to the private DNS within the 3GPP network connected to itself, and the DNS is requested to resolve the PDG address of the 3GPP packet domain service to be accessed by the WLAN user terminal, and then step 505 is performed;
- Step 505 The private DNS in the 3GPP network is resolved, and the resolution result is returned to PDG1.
- Step 506 PDG1 obtains the address required by the WLAN user terminal from the analysis result, and returns the required address information to the WLAN user terminal, that is, the address of PDG2;
- Step 507 The WLAN user terminal saves the address information returned by the PDG1, and saves the correspondence between the address information and the 3GPP packet domain service to be accessed by the WLAN user terminal, that is, the corresponding relationship;
- Step 508 The WLAN user terminal contacts the PDG2.
- the PDG2 requests the AAA server to complete the authentication and authorization of the user, and then establishes a service communication tunnel with the WLAN user terminal. Then, the WLAN user terminal communicates with the PDG2 by using the established tunnel.
- the WLAN user terminal When the WLAN user terminal needs a PDG address different from the above 3GPP packet domain service again, it first searches in the local list. If a PDG address supporting the service is found, it will directly contact the PDG. If it is not found, Then, it is determined whether there is a tunnel connection currently. If so, the tunnel is used and the method provided in this embodiment is used for querying. If there is no tunnel connection currently, the WLAN user terminal goes to the public DNS for resolution.
- FIG. 6 shows a flowchart of applying the third embodiment of the present invention.
- the AAA server that has completed the authentication and authorization stores information about the PDG and the correspondence between the PDG and the services it supports.
- Step 601 When a WLAN user terminal accesses a service of the 3GPP packet domain for the first time, it first resolves the PDG address of the requested service to the public DNS, and then selects a PDG address from the PDG addresses resolved by the public DNS, that is, selects a PDG; In this embodiment, it is assumed that PDG1;
- Step 602 The WLAN user terminal contacts PDG1.
- the PDG1 requests the AAA server to complete the authentication and authorization of the user, and establishes a service communication tunnel with the WLAN user terminal. Then, the WLAN user terminal uses the established tunnel to communicate with PDG1.
- Step 603 If the WLAN user terminal needs to request access to a new 3GPP packet domain service, that is, if it needs a different PDG address, then directly send a message requesting the PDG address to PDG1, that is, to provide PDG1 with the service it needs.
- Service access point name (W-APN) identification in this embodiment, it is assumed that the PDG corresponding to the user requesting access to the service is PDG2;
- step 604 PDG1 first determines whether a PDG address corresponding to the service requested by the user is stored locally. If so, step 607 is directly performed; otherwise, PDG1 requests the AAA server to authenticate and authorize the newly applied service of the WLAN user terminal;
- Step 605 After the AAA server completes the authentication and authorization of the user, it locally queries the address of the PDG that can support the newly applied service of the WLAN user terminal, and inserts the selected PDG address, that is, the address of PDG2 into the authorization information. ;
- Step 606 The AAA server returns authorization information to PDG1, where the authorization information includes the PDG address of the 3GPP packet domain service to be accessed by the WLAN user terminal, that is, the address of PDG2;
- Step 607 PDG1 returns the required address information to the WLAN user terminal, that is, the address of PDG2.
- Step 608 The WLAN user terminal saves the address information returned by the PDG1, and saves the correspondence between the address information and the new 3GPP packet domain service to be accessed by the WLAN user terminal.
- Step 609 The WLAN user terminal contacts the PDG2, and ends with the WLAN user.
- the end establishes a tunnel for service communication, and then uses the established tunnel to communicate with PDG2.
- the WLAN user terminal When the WLAN user terminal needs a PDG address different from the above 3GPP packet domain service again, it first searches in the local list. If a PDG address supporting the service is found, it will directly contact the PDG. If it is not found, Then it is judged whether there is a tunnel connection currently. If so, the tunnel is used and the method provided in this embodiment is used for query. If there is no tunnel connection currently, the WLAN user terminal then resolves to the public DNS and performs the analysis according to the existing process. deal with.
- the time when the WLAN user terminal saves the correspondence between the service to be requested to be accessed by the WLAN user terminal and its corresponding PDG address is preset, and the saving time can be set by the user, or the system's default Save time. Once the saved information is used, the save time will be initialized and the timer will restart. If the saved correspondence has not been used within the save time, the preset save time will be exceeded. After that, the correspondence will be deleted.
- the method provided in the above embodiment is used Perform processing, and update the address information corresponding to the requested access service saved by itself; if the information saved by the WLAN user terminal application fails to connect, but there is still a tunnel connection, the WLAN user terminal will re-analyze to the public DNS To perform routine processing and update the address information corresponding to the requested access service saved by itself.
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CNB2004100010279A CN100341341C (zh) | 2004-01-16 | 2004-01-16 | 一种无线局域网中用户终端获取分组数据关口地址的方法 |
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CN101296225B (zh) * | 2007-04-29 | 2012-08-08 | 华为技术有限公司 | 会话管理功能装置及提供业务的系统和方法 |
CN105516374A (zh) * | 2014-09-23 | 2016-04-20 | 中兴通讯股份有限公司 | 内部地址分配方法、装置、服务器及系统 |
CN106101300B (zh) * | 2016-06-22 | 2020-08-18 | 东方有线网络有限公司 | 通过私有域名系统控制访问自建服务器的方法 |
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GB2350970A (en) * | 1999-06-08 | 2000-12-13 | Ericsson Telefon Ab L M | Mobile internet access |
US20030091012A1 (en) * | 2001-08-15 | 2003-05-15 | Barker Charles R. | System and method for providing an addressing and proxy scheme for facilitating mobility of wireless nodes between wired access points on a core network of a communications network |
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US5708655A (en) * | 1996-06-14 | 1998-01-13 | Telefonaktiebolaget L M Ericsson Publ | Method and apparatus for addressing a wireless communication station with a dynamically-assigned address |
KR100429182B1 (ko) * | 1998-09-07 | 2004-06-16 | 엘지전자 주식회사 | 비에이티엠백본망에서의이동통신패킷데이터네트워크및이동통신패킷데이터서비스제공방법 |
SE518479C2 (sv) * | 2000-10-13 | 2002-10-15 | Ericsson Telefon Ab L M | Kommunikationssystem som stödjer trådlös kommunikation av paketdata och förfarande och anordning relaterande därtill |
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GB2350970A (en) * | 1999-06-08 | 2000-12-13 | Ericsson Telefon Ab L M | Mobile internet access |
US20030091012A1 (en) * | 2001-08-15 | 2003-05-15 | Barker Charles R. | System and method for providing an addressing and proxy scheme for facilitating mobility of wireless nodes between wired access points on a core network of a communications network |
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CN100341341C (zh) | 2007-10-03 |
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