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CN1306762C - Method of keeping IP address of CDMA2000 incorporated WLAN user on cross-network switchover - Google Patents

Method of keeping IP address of CDMA2000 incorporated WLAN user on cross-network switchover Download PDF

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CN1306762C
CN1306762C CN 200410000776 CN200410000776A CN1306762C CN 1306762 C CN1306762 C CN 1306762C CN 200410000776 CN200410000776 CN 200410000776 CN 200410000776 A CN200410000776 A CN 200410000776A CN 1306762 C CN1306762 C CN 1306762C
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user
keeping
ip
switchover
address
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CN 200410000776
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CN1558695A (en )
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耿兆森
王敏鹏
李航
陈云斌
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中兴通讯股份有限公司
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Abstract

本发明公开一种WLAN融合CDMA2000用户跨网切换时保持IP地址不变的方法,在用户初次接入WLAN或CDMA2000时,PDSN会根据该用户的IMSI和MAC地址建立查询索引,这样,当用户跨网切换到WLAN网络并根据AAA接入应答报文中的IMSI查询到该用户的CDMA2000接入记录时,或者用户跨网切换到CDMA2000并根据AAA接入应答报文中的MAC地址或已知的IMSI查询到该用户的WLAN接入记录时,则说明该用户是跨网络切换用户,为该用户分配在原网络连接中使用的IP地址,从而实现了跨网切换时IP地址不变的目的。 The present invention discloses a holding CDMA2000 fusion WLAN user the same IP address across the network switching method, when the first user access to the WLAN or CDMA2000, the PDSN creates query index according to the user's IMSI and the MAC address, so that when a user across Handoff to WLAN network queries to the network and the user according to the AAA reply packet access CDMA2000 access the IMSI of the recording, or inter-network handover to the user and in accordance with CDMA2000 AAA access response message or MAC address known when queried IMSI record of the user's WLAN access, then the user is switching users across networks, the IP address assigned for the user to use the original network connection, thereby implementing the same IP address inter-network handover purpose. 本发明方法避免了采用移动IP技术带来的迂回路由等问题,简单可靠。 The method of the present invention avoids the problems caused by using circuitous routing mobile IP technology, simple and reliable.

Description

WLAN融合CDMA2000用户跨网切换时保持IP地址不变的方法 IP addresses remain unchanged when switching method WLAN integration CDMA2000 users across the network

技术领域 FIELD

本发明涉及CDMA2000和无线局域网(WLAN)分组数据服务领域,特别涉及一种WLAN融合CDMA2000用户跨网络切换时对其IP地址的处理方法。 Packet data service FIELD The present invention relates to wireless local area networks and CDMA2000 (WLAN), and more particularly to a processing method when the IP address of its fusion between a WLAN user across CDMA2000 network handover.

背景技术 Background technique

无线局域网(Wireless LAN,以下简称WLAN)在一定的范围内可以提供比蜂窝通信系统更宽的带宽,比如工作在2.4GHz频率的IEEE 802.11b可提供11Mbps的带宽,而工作在5GHz频率的IEEE 802.11a可提供54Mbps的带宽。 Wireless LAN (Wireless LAN, hereinafter referred to as WLAN) within a certain range than cellular communication system may provide a wider bandwidth, such as IEEE 802.11b 2.4GHz working frequency can provide bandwidth of 11Mbps, and IEEE 802.11 working frequency in the 5GHz a bandwidth of 54Mbps is available. WLAN具有价格低廉、组网灵活、支持高速无线数据接入以及开放频段等特点。 WLAN has a low cost, flexible networking, support for high-speed wireless data access as well as opening band and so on. 作为3G标准之一的CDMA2000网络,它可以在更广阔的范围内为用户提供153.6Kpbs的分组带宽,当CDMA2000网络发展到EV-DO、EV-DV阶段时,用户的分组接入速率将达到2~4Mbps。 As one of the 3G standard CDMA2000 network, it can provide a packet for the bandwidth 153.6Kpbs user in a wider range, when the CDMA2000 network development to EV-DO, EV-DV stage, the packet will reach the access rate of the user 2 ~ 4Mbps. 为了使用户能够获得更高带宽、更广覆盖的分组数据接入服务,WLAN网络和CDMA2000网络的融合就成了一个必然的发展趋势,实现两种网络的融合,优势互补,取长补短。 To enable users to achieve higher bandwidth and broader coverage of packet data access services, network integration of WLAN and CDMA2000 networks has become an inevitable trend of development, to achieve the integration of two networks complement each other, learn from each other. 在两种网络融合的过程中,一般把WLAN网络接入作为CDMA2000网络接入方式的补充。 During fusion of the two networks, typically the WLAN access network as a complement of the CDMA2000 network access.

在CDMA2000网络中,分组数据服务节点(Packet Data Serving Node,以下简称PDSN)承担分组数据接入服务功能,WLAN网络与CDMA2000网络融合方案中把WLAN网络接入网关功能引入到PDSN中,这样PDSN将同时支持CDMA2000用户和WLAN用户的分组接入服务。 In CDMA2000 network, the packet data serving node (Packet Data Serving Node, hereinafter PDSN) bear the packet data access services, the WLAN network and the CDMA2000 network to the WLAN network convergence scheme is introduced to the PDSN access gateway function, so that the PDSN It supports both CDMA2000 users and users of WLAN packet access service. 本发明中提到的PDSN就是指同时支持WLAN网络用户和CDMA2000网络用户接入的接入网关。 Mentioned in the present invention refers to the PDSN access gateway to support WLAN user access users and CDMA2000 networks.

WLAN网络和CDMA2000网络融合方案的系统架构图如图1所示,双模终端11、16通过基站/收发信机12、基站控制器13或者通过接入点17、接入点网关18连接到PDSN 19,PDSN19再通过IP网络与应用服务器20,营帐系统21以及认证、授权、计费服务器(简称AAA服务器)22相连。 System Architecture WLAN networks and CDMA2000 networks convergence As shown, the dual-mode terminal 11, 16 12, 13 or the base station controller 17, the access point 18 is connected to PDSN 1 gateway through a base station / transceiver through the access point 19, PDSN19 then 20, 22 21 and is connected to authentication, authorization, and accounting server (AAA server for short) with the application server through an IP network system tent. 基站控制器13还连接到与归属位置寄存器15相连的移动交换中心14,把CDMA2000网络拥有的完善的鉴权、计费机制以及成熟的业务模式应用到WLAN网络中,用户可以在WLAN的覆盖范围内采用WLAN的接入方式,享受WLAN网络带来的高速无线数据接入服务,在非WLAN覆盖区域采用CDMA2000的接入方式,享受CDMA2000网络提供的超广覆盖的便利。 The base station controller 13 is also connected to a mobile switching center to the home location register 1514, the CDMA2000 network authentication has perfect, charging mechanisms and mature business model applied to the WLAN network, the WLAN user can cover the in the use of WLAN access and enjoy the WLAN network to bring high-speed wireless data access services using CDMA2000 in the non-access WLAN coverage area, enjoy the convenience of ultra-wide coverage of CDMA2000 network provides. 关于两网切换的方法可参考中国专利申请CN 03156356.2(移动终端在码分多址系统与无线局域网间切换的方法)以及CN 200310100535.8(一种实现CDMA系统与无线局域网结合的用户接入方法)中的内容。 About two network switching method may be referred to Chinese patent application CN 03156356.2 (code division multiple access method of a mobile terminal between the switching system and the wireless local area network), and CN 200310100535.8 (A user access method for a CDMA system implemented in combination with the wireless local area network) in Content.

通常WLAN用户接入分组网络时采用PPPoE的拨号方式,而CDMA2000网络用户接入分组网络时采用PPP拨号方式,当用户从WLAN网络切换到CDMA2000网络,或者从CDMA2000网络切换到WLAN网络,由于终端和PDSN之间的通讯链路需要重新建立,因此PDSN为终端分配的IP地址一般会发生变化,这样终端的所有通讯连接都会中断。 WLAN typically uses the PPPoE dial-up user to access the packet network and the CDMA2000 network when the user uses dial-up PPP access packet network, when the user switches from a WLAN network to a CDMA2000 network, or from the CDMA2000 network to WLAN network, since the terminal, and PDSN communication link between the need to re-establish, therefore PDSN IP address assigned to the terminal in general vary, so all communications terminal connections are interrupted. 当WLAN融合CDMA2000用户发生跨网络切换时,如何保证用户发生跨网络切换前后的IP地址不变,这是WLAN网络与CDMA2000网络融合的一个重大的技术障碍。 When WLAN integration CDMA2000 users across the network handover occurs, how to ensure that the IP address of the user before and after the occurrence of cross-network switching unchanged, which is a significant technical hurdles WLAN network and CDMA2000 network integration.

为保证WLAN融合CDMA2000用户发生跨网络切换时保证用户的IP地址不发生变化,目前业界最常用的方法是采用移动IP技术,即PDSN承担移动IP的外地代理(Foreign Agent,以下简称FA)功能,即使用户发生了跨网络的切换,但用户对应的归属代理(Home Agent,以下简称HA)却始终保持不变,HA负责为用户分配IP地址,同时承担用户和归属网络通讯的路由器的功能,正是由于HA没有发生改变,所以HA为终端分配的IP地址也可以不变。 To ensure WLAN integration to ensure the user's IP address does not change when the inter-network switching CDMA2000 users happen, the industry's most commonly used method is the use of mobile IP technology, namely PDSN assume Mobile IP Foreign Agent (Foreign Agent, hereinafter referred to as FA) function, even if the user happens to switch across the network, but users corresponding home agent (Home agent, hereinafter referred to as HA) has remained unchanged, HA is responsible for allocating IP addresses to users, and to assume the function of the user and the home network router communications, is Since HA is not changed, so the HA IP address assigned to the terminal may change. 但这种方案存在以下一些缺点:所有发往终端的报文都需要归属代理的路由,网络存在着严重的迂回路由问题,网络的利用效率较低;归属代理的负担较重,所有发往终端的报文都需要通过HA路由;移动IP技术还存在着诸多技术障碍,还不具备大规模使用的条件。 But the existence of this program the following disadvantages: all the packets sent to the terminal requires the home agent routing, network circuitous route there is a serious problem, inefficient use of the network; a home agent of a heavier burden, all sent to the terminal the message must go through the HA route; mobile IP technology, there are still many technical barriers, do not have the conditions for large-scale use.

发明内容 SUMMARY

针对以上现有技术的缺点,本发明要解决的技术问题是提出一种WLAN融合CDMA2000用户跨网切换时保持IP地址不变的方法,简单可靠,并无需迂回路由。 For the above disadvantages of the prior art, the present invention is to solve the technical issues have been raised between a WLAN integration remains CDMA2000 users across the network the same IP address switching method is simple and reliable, and do not need circuitous route.

为了解决上述技术问题,本发明提供了一种WLAN融合CDMA2000用户从CDMA2000跨网切换到WLAN时保持IP地址不变的方法,包括以下步骤:(a)用户接入WLAN分组网络;(b)PDSN向AAA服务器进行该用户的接入认证;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的IMSI;(d)PDSN判断所述接入认证应答报文中是否携带有该用户的IMSI,如果是,执行下一步,否则,执行步骤(h);(e)PDSN根据所述IMSI查询该用户的CDMA2000的接入记录,如果查到,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束;(h)PDSN为该用户分配一个新的IP地址,建立该用户的MAC地址索引,结束。 To solve the above technical problem, the present invention provides a method of maintaining the same IP address when the fusion WLAN user switches from CDMA2000 to CDMA2000 network across the WLAN, comprising the steps of: (a) the user access to a WLAN packet network; (b) PDSN the AAA server for the user access authentication; (c) fusion of the WLAN user CDMA2000, AAA server carries the IMSI of the user in the access authentication acknowledgment message sent in; (d) PDSN determines said access authentication response message whether the paper carries the IMSI of the user, if yes, the next step, otherwise, performing step (h); (e) PDSN access query record according to the IMSI of the user CDMA2000, if found, the next step otherwise, performing step (g); (f) PDSN IP address used before the handover of the user re-assigned to the user, the user's index to establish IMSI, end; (g) PDSN for the user to assign a new IP address establishing IMSI of the user index, ending; (h) PDSN for the user to assign a new IP address, MAC address index to establish the user's end.

当系统中是由AAA服务器来为用户分配IP地址时,所述步骤(c)中,AAA服务器还为该用户分配一个新的IP地址,在所述步骤(g)和(h)中,再由PDSN将该新的IP地址分配给该用户,而在所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址,仍将所述该用户切换前使用的IP地址分配给该用户,并可向AAA服务器发送一个对应于该IP地址但计费信息为0的计费终止报文,以加快该IP地址的释放。 When the system is to assign IP addresses to the user by the AAA server, said step (c) is, the AAA server also assigns a new IP address for the user, in said step (g) and (H), then assigned by the PDSN new IP address to the user, and in said step (f) are, without using PDSN IP address assigned to the AAA server, the IP address will switch between the front of the user assigned to the user, and may transmit a corresponding IP address but the billing information to the billing termination message 0, to accelerate the release of the IP address to the AAA server.

为了通过MAC地址来判断是否是切换用户,所述步骤(f)和(g)中,还可建立该用户的MAC地址索引。 In order to determine whether the MAC address of the user is switched, said step (f) and (g) may also be established a MAC address of the user's index.

为了解决上述技术问题,本发明还提供了一种WLAN融合CDMA2000用户从WLAN跨网切换到CDMA2000时保持IP地址不变的方法,包括以下步骤:(a)用户接入CDMA2000分组网络;(b)PDSN向AAA服务器进行该用户的接入认证;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的WLAN接入能力信息,如MAC地址,可以是有效或无效的;(d)PDSN判断所述接入认证应答报文中是否有该用户的WLAN接入能力信息,如果有,执行下一步,否则执行步骤(g);(e)PDSN根据该用户的IMSI或MAC地址查询其WLAN网络的接入记录,如果查到,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束。 To solve the above technical problem, the present invention also provides a method of maintaining the same IP address when the fusion WLAN user switches from CDMA2000 to CDMA2000 network across the WLAN, comprising the steps of: (a) user access CDMA2000 packet network; (b) PDSN to the AAA server for the user access authentication; (c) fusion of the WLAN user CDMA2000, WLAN AAA server carries the access capability information of the user in the access authentication response message sent, as a MAC address, it may be effective or invalid; (d) PDSN determines whether or not there is access to the WLAN access capability information of the user authentication response message, if any, the next step, otherwise performing step (g); (e) PDSN according to the user IMSI or MAC address of access to recorded queries WLAN network, if found, the next step, otherwise, performing step (g); (f) PDSN IP address before the handover of the user using the user reassigned to establish the subscriber's IMSI index, ending; (g) PDSN for the user to assign a new IP address, IMSI establishing the index of the user end.

当用户帐号中记录有MAC地址信息时,所述步骤(c)中,AAA服务器返回信息中可包含该用户有效的MAC地址,所述步骤(f)和(g)中,还建立该用户的MAC地址索引。 When a user account is recorded in the MAC address information, said step (c) in the AAA server returns the user information may include a valid MAC address, said step (f) and (g) the further establishment of the user MAC address index.

当系统中是由AAA服务器来为用户分配IP地址时,所述步骤(c)中,AAA服务器还为该用户分配一个新的IP地址,在所述步骤(g)中,再由PDSN将该新的IP地址分配给该用户,而在所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址,仍将所述该用户切换前使用的IP地址分配给该用户,并可向AAA服务器发送一个对应于该IP地址但计费信息为0的计费终止报文,以加快该IP地址的释放。 When the system is to assign IP addresses to the user by the AAA server, said step (c), the AAA server also assigns a new IP address for the user, in said step (g), and then by the PDSN the new IP address assigned to the user, and in said step (f) are, without using the PDSN IP address assigned by the AAA server, the IP address will switch between the front of the user assigned to the user, and the AAA the server sends a corresponding to the IP address but the billing information to the billing termination message 0, to speed up the release of the IP address.

当系统中是由AAA服务器来为用户分配IP地址时,本发明还提供了一种WLAN融合CDMA2000用户从WLAN跨网切换到CDMA2000时保持IP地址不变的方法,包括以下步骤:(a)用户接入CDMA2000分组网络; When the system is to assign IP addresses to the user by the AAA server, the present invention also provides a method of maintaining the same IP address during handover between a WLAN from the WLAN user fusion CDMA2000 to CDMA2000 inter-network, comprising the steps of: (a) user CDMA2000 packet access network;

(b)PDSN根据用户的IMSI查询其WLAN的接入记录,如果查到,说明该用户是跨网切换用户,在向AAA服务器进行该用户的接入认证时,通知AAA服务器不为该用户分配IP地址,如果查不到,则在向AAA服务器进行接入认证时通知AAA服务器为该用户分配IP地址;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的WLAN接入能力信息;(d)PDSN判断所述接入认证应答报文中是否有该用户的WLAN接入能力信息,如果有,执行下一步,否则执行步骤(g);(e)如果在步骤(b)判断出该用户是跨网切换用户,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束。 (B) PDSN query record its access of the WLAN user IMSI, if found, indicating that the user is an inter-network handover user, the user at the time of access authentication to the AAA server, the AAA server notifies the user that assignment is not IP address, if the finding, is notified at the time of access authentication to the AAA server AAA server assigns an IP address for the user; (c) fusion of CDMA2000 WLAN user, the AAA server carries the access authentication acknowledgment message sent in WLAN access capability information of the user; (d) PDSN determines whether or not there is access to the WLAN access capability information of the user authentication response message, if any, the next step, otherwise performing step (g); (e ) If in step (b) determines that the user is an inter-network handover user, the next step, otherwise, performing step (g); (f) PDSN IP address before the handover of the user using the user re-assigned to the establishment of the IMSI of the user index, ending; (g) PDSN for the user to assign a new IP address, IMSI establishing the index of the user end.

当用户帐号中记录有MAC地址信息时,所述步骤(c)中,AAA服务器返回信息中包含该用户有效的MAC地址,所述步骤(f)和(g)中,还建立该用户的MAC地址索引。 When a user account is recorded in the MAC address information, said step (c) in the AAA server returns a valid user information includes the MAC address, said step (f) and (g) the further establishment of the user MAC address index.

由上可知,本发明提供的方法在PDSN那里就可以保证为WLAN融合CDMA2000用户跨网络切换时分配相同的IP地址,避免了采用移动IP技术带来的迂回路由等问题,简单可靠,并遵循现有技术标准。 From the above, the present invention provides a method where the PDSN can guarantee fusion WLAN users across networks switched CDMA2000 assigned the same IP address, to avoid the use of mobile IP technology has brought circuitous routing problems, is simple and reliable, and is now following the there are technical standards.

附图说明 BRIEF DESCRIPTION

图1描述的是现有的WLAN网络和CDMA2000网络融合方案的系统架构图。 FIG 1 is described with a conventional system architecture diagram WLAN networks and CDMA2000 networks integration programs.

图2A和图2B是本发明实施例的WLAN融合CDMA2000用户接入分组网络时PDSN分配IP地址的流程图。 2A and 2B are a flowchart PDSN assigns an IP address when WLAN embodiment of the present inventive fusion CDMA2000 packet network user access.

图3是本发明实施例WLAN融合CDMA2000用户从WLAN网络切换到CDMA2000网络时终端数据连接建立过程的序列图。 FIG 3 is a sequence diagram of a terminal data when the connection establishment process embodiment of the present invention fused CDMA2000 WLAN user switches from WLAN network to a CDMA2000 network.

图4是本发明实施例WLAN融合CDMA2000用户从CDMA2000网络切换到WLAN网络时终端数据连接建立过程的序列图。 FIG 4 is a sequence diagram of a terminal fusion WLAN data connection establishment procedure when the user switches from CDMA2000 to CDMA2000 network WLAN network embodiment of the present invention.

具体实施方式 detailed description

在本发明中,PDSN把国际移动台标识(International Mobile StationIdentity,以下简称IMSI)作为WLAN融合CDMA2000用户接入CDMA2000网络的设备标识,而WLAN网卡的媒体接入控制(Media Access Control,以下简称MAC)地址作为WLAN融合CDMA2000用户接入WLAN网络的设备标识。 In the present invention, the PDSN the international mobile station identity (International Mobile StationIdentity, hereinafter referred to as IMSI) as a fusion WLAN user access device identifier CDMA2000 CDMA2000 network, and the WLAN network adapter Media Access Control (Media Access Control, hereinafter referred to as MAC) fusion address as WLAN access device CDMA2000 user identifier of the WLAN. 对于WLAN融合CDMA2000用户,在两网均有权接入,它在AAA(Authentication,Authorization,and Accounting,以下简称AAA)服务器数据库的帐号记录着该用户的用户名、IMSI以及是否有接入WLAN网络的权限,如果知道用户的WLAN网卡的MAC地址,在用户帐号中也可以记录该MAC地址,这与系统所采取的具体策略有关。 For WLAN integration of CDMA2000 subscribers in the two networks have the right to access that account server database records the user's user name in the AAA (Authentication, Authorization, and Accounting, hereinafter referred to as AAA), IMSI and whether access to the WLAN network authority, if you know the MAC address of the WLAN card user, the user account can also record the MAC address, which is specific strategy and related systems adopted.

用户接入分组网络时,接入服务器和AAA服务器都可以为用户分配IP地址,但都是由PDSN在PPP会话的IPCP阶段通知给终端,为了描述方便,在下述实施例中以PDSN分配IP地址的方式描述。 When the user accesses a packet network, the access server and the AAA server that users can assign IP addresses, but they are informed by PDSN in the IPCP phase of PPP session to the terminal, for convenience of description, embodiments PDSN to assign an IP address in the following examples in the manner described.

本实施例的流程图如图2A和图2B所示,包含了WLAN融合CDMA2000用户接入WLAN分组网络和CDMA2000时分配IP地址的流程,如图所示,包括以下步骤:步骤100,用户接入分组网络;步骤110,PDSN判断用户接入是否WLAN分组网络,如果是,执行下一步,否则说明用户接入的是CDMA2000,执行步骤300;步骤120,PDSN根据用户名以及密码等向AAA服务器进行接入认证;步骤130,对WLAN融合CDMA2000用户,AAA在发出的RADIUS接入认证应答报文中携带该用户的IMSI,对普通用户(指该用户不具备CDMA2000的接入能力)则不携带;步骤140,PDSN根据RADIUS接入认证应答报文中是否携带有该用户的IMSI来判断其是否为WLAN融合CDMA2000用户,如果是,执行下一步,否则执行步骤190;步骤150,对于WLAN融合CDMA2000用户,就有可能是跨网络切换来的,在PDSN内,根据AAA返回的IMSI查询该用户的CDMA2000的接入记录,如果查 A flowchart of FIG. 2A to the present embodiment and 2B, the WLAN includes WLAN access user fusion CDMA2000 packet network and assign IP addresses CDMA2000-time process, as shown, includes the following steps: Step 100, the user access packet network; step 110, PDSN determines whether the WLAN user access packet network, if yes, the next step, otherwise the user access is described CDMA2000, perform step 300; step 120, PDSN to the AAA server for the user name and password access authentication; step 130, the integration of the WLAN user CDMA2000, issued by the AAA in the RADIUS access authentication response message carries the user's IMSI, the average user (that means the user does not have the ability to access the CDMA2000) carry not; step 140, PDSN the RADIUS access authentication response packet if the user carries the IMSI to determine whether the user is fused CDMA2000 WLAN, if yes, the next step, otherwise, executing step 190; step 150, a WLAN user fusion CDMA2000 , it is possible to come across the switching network, in the PDSN, the access query record according to the IMSI of the user of CDMA2000 AAA returned check if 到,说明该用户是跨网络切换用户,执行下一步,否则就说明该用户刚接入WLAN分组网络,执行步骤180;步骤160,PDSN把该用户切换前使用的IP地址重新分配给该用户,执行步骤180;步骤170,PDSN为其分配一个新的IP地址;步骤180,PDSN根据用户IMSI和MAC地址建立用户索引,结束;这样,等下次用户发生跨网络切换时就可以根据该IMSI索引和MAC地址索引查询了;步骤190,PDSN判断出该用户是普通的WLAN用户,为该用户分配一个新的IP地址;步骤200,根据该用户的MAC地址建立用户索引,结束;当用户接入的是CDMA2000分组网络时,本实施例中假定AAA服务器的用户帐号中包含MAC地址,其处理流程如下(图2B):步骤300,PDSN根据用户名以及密码等向AAA服务器进行接入认证;步骤310,对WLAN融合CDMA2000用户,AAA在发出的RADIUS接入认证应答报文中携带该用户的有效MAC地址,对普通 To, indicating that the user is switching users across networks, the next step, otherwise this user is just WLAN access packet network, perform step 180; step 160, PDSN IP address before the handover of the user using the reallocated to the user, performing step 180; step 170, PDSN assigns a new IP address; step 180, the PDSN establish a user index IMSI and the user MAC address, an end; this, next time when the user occurs across the switching network can be based on the IMSI index and query the MAC address index; step 190, PDSN determines that the user is a regular WLAN users, assigning a new IP address for the user; step 200, create a user according to the MAC address of the user index, ending; when the user access the packet network is a CDMA2000, the present embodiment assumes that the AAA server includes a MAC address of the user account, which process is as follows (FIG. 2B): a step 300, PDSN user name and password for access authentication according to the AAA server; step 310, a WLAN user CDMA2000 fusion, the AAA carries the MAC address of the valid user in the RADIUS access authentication response packet sent in ordinary 户则不携带MAC地址;该步骤中,如果用户帐号中没有MAC地址信息,对于WLAN融合CDMA2000用户只返回标识用户是否具有接入能力的信息,如,一个无效的MAC地址,如00-00-00-00-00-00或FF-FF-FF-FF-FF-FF。 Carries no user MAC address; this step, if the user account is not the MAC address information, a WLAN fusion CDMA2000 user identification whether the user has only returns information access capability, e.g., a MAC address is invalid, such as 00-00- 00-00-00-00 or FF-FF-FF-FF-FF-FF.

步骤320,PDSN根据RADIUS接入认证应答报文中是否携带有该用户的WLAN接入能力信息(本实施例指是否带有MAC地址,可以是有效或无效的),判断该用户是否WLAN融合CDMA2000用户,如果是,执行下一步,否则,执行步骤390;步骤330,对WLAN融合CDMA2000用户,就有可能是跨网络切换来的,在PDSN内,根据AAA返回的MAC地址或IMSI查询该用户的WLAN网络的接入记录,如果查到,说明该用户是跨网络切换用户,执行下一步,否则就说明该用户刚接入CDMA2000分组网络,执行步骤350;需要说明的是,如果AAA中没有返回有效的MAC地址,则只根据IMSI查询;步骤340,PDSN把该用户切换前使用的IP地址重新分配给该用户,执行步骤360;步骤350,PDSN为该用户分配一个新的IP地址;步骤360,PDSN判断AAA服务器返回的MAC地址是否有效,如果是,执行下一步,否则执行步骤380;步骤370,PDSN根据用户I Step 320, PDSN RADIUS access authentication response according to whether the packet carries a WLAN access capability information of the user (with the present embodiment refers to whether the MAC address, may be valid or invalid), it is determined whether the WLAN user fusion CDMA2000 user, if yes, the next step, otherwise, perform step 390; step 330, the integration of the WLAN user CDMA2000, there may be switched to the cross-network, in the PDSN, AAA returns the MAC address of the user's query or IMSI WLAN access network records, if found, indicating that the user is an inter-network handover user, the next step, otherwise this user is just CDMA2000 packet access network, performing step 350; should be noted that, if none of the AAA valid MAC address, according to the IMSI only query; step 340, PDSN IP address before the handover of the user using the user re-assigned to the performing step 360; step 350, PDSN the user is assigned a new IP address; step 360 , the PDSN determines AAA server returns the MAC address is valid, if so, the next step, otherwise, executing step 380; step 370, PDSN user I MSI以及MAC地址建立用户索引,结束;这样,等下次用户发生跨网络切换时就可以根据IMSI索引或MAC地址索引查询了;步骤380,PDSN仅根据该用户的IMSI建立用户索引,结束;步骤390,PDSN判断出该用户是普通的CDMA2000用户,为该用户分配一个新的IP地址;步骤400,PDSN仅根据该用户的IMSI建立索引,结束。 MSI and a MAC address to establish a user index, ending; so, so the next inter-network handover occurs when the user can query the MAC address according to the IMSI index or index; step 380, PDSN establish the user only according to the user's index IMSI ends; Step 390, PDSN determines that the user is a normal user CDMA2000, assign a new IP address for the user; step 400, PDSN indexed only according to the user's IMSI, ends.

下面再结合图3的序列图描述一下WLAN融合CDMA2000用户从WLAN网络切换到CDMA2000网络的具体接入流程。 Here again the sequence of FIG. 3 in conjunction with FIG describe fusion CDMA2000 WLAN handover from a WLAN network user to a specific CDMA2000 network access procedure.

用户首先接入WLAN,其具体接入流程如下:接入终端(Access Terminal,以下简称AT)和WLAN网络的接入点(Access Point,以下简称AP)之间建立好WLAN网络无线连接;接入点网关(Access Point Gateway,以下简称APGW)和PDSN之间为该用户建立RP会话;接着在AT和PDSN之间开始建立PPP会话;在结束PPP会话的LCP协商后,PDSN根据AT的认证请求,通过AAA对AT进行鉴权,鉴权方式可采用PAP、CHAP、EAP中的任意一种;AAA返回RADIUS接入应答报文,对WLAN融合CDMA2000用户,携带该用户的IMSI;在用户通过AAA的认证后,AT和PDSN之间继续IPCP的协商。 First user access WLAN, the specific access procedure as follows: to establish a good wireless connection between the WLAN network access terminal (Access Terminal, hereinafter referred to as AT) and an access point of the WLAN network (Access Point, hereinafter referred to as the AP); Access established between point gateway (Access point gateway, hereinafter referred to as APGW) and PDSN RP session for the user; then began between the aT and PDSN establish a PPP session; after the PPP LCP negotiation session, PDSN authentication request according to the aT, by the aT AAA authentication, authentication manner may be used PAP, CHAP, any one of the EAP; RADIUS AAA returns the access response message, the integration of WLAN CDMA2000 user carries the IMSI of the user; the user via the AAA after certification, continuing IPCP negotiation between the AT and PDSN. PDSN根据AAA返回的RADIUS接入应答报文中的IMSI,可以判断出该用户是WLAN融合CDMA2000用户,由于用户是刚接入的,所以PDSN不能根据IMSI查出该用户的CDMA2000的接入记录,PDSN将为该用户建立IMSI和MAC的绑定关系,并为该用户建立IMSI和MAC索引,然后PDSN在PPP的IPCP阶段为该用户新分配一个IP地址,自此该WLAN融合CDMA2000用户的WLAN网络连接就建立成功了;PDSN向AAA发送计费开始报文。 The RADIUS AAA PDSN access response message returns the IMSI, the user can determine that a WLAN user fusion CDMA2000, since it is just the user's access, the PDSN can not access the records of the user according to the IMSI isolated CDMA2000, PDSN will establish a binding relationship between the IMSI for the user and the MAC, and the MAC index and establish IMSI for the user, and then assign a new PDSN IP address for the user in the IPCP phase of PPP, since the integration of CDMA2000 users of WLAN networks WLAN connection is established successful; PDSN start sending the message to the AAA billing.

当用户移出WLAN网络的服务范围并处于CDMA2000的服务范围时,用户具备了跨网络切换的条件。 When the user moves out of range of the WLAN service in the service area and CDMA2000, the user has the conditions for inter-network handoff.

从WLAN切换到CDMA2000时,其具体接入流程如下:AT和CDMA2000无线网络之间建立无线连接,并分配无线业务信道;分组控制功能节点(Packet Control Function,以下简称PCF)和PDSN之间为该用户建立RP会话;接着AT和PDSN之间将建立PPP会话;在结束PPP会话的LCP阶段协商后,PDSN根据AT的认证请求,向AAA认证此用户的合法性,认证方法可以是PAP、CHAP以及EAP中的任意一种;AAA返回RADIUS接入应答报文,对该WLAN融合CDMA2000用户,携带该用户的MAC地址;在用户通过AAA的认证后,AT和PDSN之间继续IPCP的协商,PDSN根据该用户的MAC地址查询后可以判断出该用户是跨网络切换用户,在此阶段为该用户分配跨网络切换前使用的IP地址;在该步骤中,实际上在AAA认证前PDSN就可以根据该用户的IMSI查询接入记录,判断出该用户是否跨网络切换用户,因而此时也可以在认证之前就进行查询。 When switching from the WLAN to CDMA2000, the specific access procedure as follows: between the AT to establish a wireless connection and CDMA2000 wireless network, and allocates a radio traffic channel; between a packet control function for the node (Packet Control Function, hereinafter referred to as PCF) and the PDSN RP users to establish a session; then PPP session is established between the aT and PDSN; after the LCP phase of PPP session negotiation, PDSN aT according to the authentication request to the legitimacy of the AAA authenticates the user, the authentication methods can be PAP, CHAP and any one of EAP; RADIUS AAA returns the access response message, the WLAN user CDMA2000 fusion, carrying the MAC address of the user; IPCP negotiation continues after the user authentication through the AAA, between the aT and the PDSN, PDSN according MAC address of the user's query may be determined that the user over a network, switching users, at this stage switching network across an IP address assigned before use for the user; in this step, before actually AAA authentication can be based on the PDSN query access subscriber's IMSI record, it is determined whether the user across the network handover user, and thus this case can be just prior to the authentication query.

在新的CDMA2000网络连接建立后,PDSN就可以发起释放旧的WLAN网络连接了,在此之前AT也可以主动发起释放WLAN的网络连接。 After the new CDMA2000 network connection is established, PDSN may initiate release the old WLAN network connection, and before that AT can also initiate the release of WLAN network connection.

下面再结合图4描述一下WLAN融合CDMA2000用户从CDMA2000网络切换到WLAN网络的具体接入流程。 The following describe recombination WLAN fusion CDMA2000 CDMA2000 network user switches from a network to a specific WLAN access procedure of FIG. 4.

用户首先接入CAMA2000,其具体接入流程如下:AT和CDMA2000无线网络之间建立好无线连接并建立无线业务信道;分组控制功能节点(PCF)和PDSN之间为该用户建立RP会话;接着在AT和PDSN之间开始建立PPP会话的LCP阶段协商; User first accesses CAMA2000, specific access procedure as follows: to establish a good wireless connection between the AT and CDMA2000 wireless network and establish a wireless traffic channel; RP session established between node a Packet Control Function (PCF) and the PDSN for the user; followed by to start building the LCP phase of PPP session negotiation between the AT and PDSN;

在结束PPP会话的LCP协商后,PDSN根据AT的认证请求,通过AAA对AT进行鉴权;AAA对接入认证请求返回RADIUS接入应答报文,对WLAN融合CDMA2000用户,携带MAC地址(有效或无效);在用户通过AAA的认证后,AT和PDSN之间继续IPCP的协商。 At the end of LCP negotiation of a PPP session, the PDSN according to the authentication request the AT, the AT by AAA authentication; RADIUS AAA returns the access authentication response packet access request, WLAN fusion CDMA2000 user carries the MAC address (or effective invalid); after the user authentication through AAA, continue IPCP negotiation between the aT and PDSN. PDSN根据RADIUS接入应答报文,可以判断出该用户是WLAN融合CDMA2000用户,并且还有可能知道该用户的有效MAC地址,由于用户是刚接入的,所以PDSN不能根据IMSI或MAC查出该用户的WLAN网络连接记录,PDSN将为该用户建立IMSI索引,如果知道该用户的MAC地址,PDSN还建立MAC索引,然后PDSN在PPP的IPCP阶段为该用户新分配一个IP地址,自此该WLAN融合CDMA2000用户的CDMA2000网络连接就建立成功了。 The PDSN RADIUS access response message, the user can determine that a WLAN user CDMA2000 fusion, and it is also possible to know the MAC address of the valid user, since the user has just access, so that the PDSN can not be isolated according to the IMSI or MAC WLAN network user connection record, index PDSN will establish IMSI for the user, if the user knows the MAC address, MAC indices also established PDSN, PDSN and assign a new IP address for the user in the IPCP phase of PPP, since the WLAN integration of CDMA2000 subscribers CDMA2000 network connection is established success.

一般来说,WLAN网络的覆盖范围被包含在CDMA2000网络的覆盖范围内,所以当用户进入WLAN网络的服务范围时,有可能还在CDMA2000网络的覆盖范围内,但此时用户就具备了跨网络切换的条件。 In general, the coverage of WLAN networks is included in the coverage of CDMA2000 network, so when the user enters the service area of ​​the WLAN network, there may still be within the coverage of CDMA2000 networks, but this time the user has the inter-network conditions switching.

然后,从CDMA2000切换到WLAN时,其具体接入流程如下:AT和WLAN无线网络之间建立无线连接;随后无线接入点网关(APGW)和PDSN之间为该用户建立RP会话;接着AT和PDSN之间将建立PPP会话;在结束PPP会话的LCP阶段协商后,PDSN根据AT的认证请求,通过AAA对AT进行鉴权;AAA对接入认证请求返回RADIUS接入应答报文,对WLAN融合CDMA2000用户,携带用户的IMSI;在用户通过AAA的认证后,AT和PDSN之间继续IPCP的协商。 Then, when switching from CDMA2000 to a WLAN, the access specific process is as follows: establishing a wireless connection between the WLAN radio network and the AT; RP then establishes a session between the wireless access point gateway (APGW) and the PDSN for the user; AT and then will be established between the PDSN PPP session; after the LCP phase of PPP session negotiation, PDSN aT according to the authentication request, authenticate the aT by AAA; AAA access authentication request to return to RADIUS access response message, the integration of WLAN CDMA2000 users, carry the user's IMSI; IPCP negotiations continue after the user authentication through AAA, between the aT and PDSN. PDSN根据RADIUS接入应答报文中返回的IMSI可从IMSI索引中查找到该用户的CDMA2000的接入消息,从而判断出该用户是切换用户,所以在随后的PPP的IPCP协商阶段中,PDSN将为该用户分配在CDMA2000网络连接中使用的IP地址;在新的WLAN网络连接建立后,PDSN就可以发起释放旧的CDMA2000网络连接了,在此之前AT也可以主动发起释放CDMA2000的网络连接。 The PDSN RADIUS access response message returned IMSI IMSI can be found from the index to the user CDMA2000 access message so that the user determines the user is switched, so that in a subsequent phase of the PPP IPCP negotiation, the PDSN the user is assigned an IP address using the CDMA2000 network connection; after a new WLAN network connection is established, PDSN may initiate release the old CDMA2000 network connection, and before that aT can also initiate the release of CDMA2000 network connection.

综上所述,在用户初次接入WLAN或CDMA2000时,PDSN会为WLAN融合CDMA2000用户建立IMSI和MAC地址之间的绑定关系,并根据IMSI和MAC地址建立查询索引。 As described above, when the first user access to the WLAN or CDMA2000, the PDSN will establish a WLAN user CDMA2000 fusion binding relationship between the IMSI and the MAC address, and establishing a query index and a MAC address according to the IMSI. 这样,当用户跨网切换到WLAN网络并根据AAA接入应答报文中的IMSI查询到该用户的CDMA2000接入记录时,或者用户跨网切换到CDMA2000并根据AAA接入应答报文中的MAC地址或已知的IMSI查询到该用户的WLAN接入记录时,则说明该用户是跨网络切换用户,为该用户分配在原网络连接中使用的IP地址,从而实现了跨网切换时IP地址不变的目的。 Thus, when the user inter-network handover to the WLAN access network and recording the query to the CDMA2000 AAA user access response message according to the IMSI, or inter-network handover to the user and the MAC CDMA2000 AAA access response message in accordance with an address query or known to the WLAN access IMSI record for the user, then the user is switching users across networks, the IP address assigned for the user to use the original network connection, in order to achieve inter-network when the IP address is switched the purpose of the change. 本发明方法避免了采用移动IP技术带来的迂回路由等问题,简单可靠。 The method of the present invention avoids the problems caused by using circuitous routing mobile IP technology, simple and reliable.

本发明在上述实施例的基础上,还可以有各种变换,例如,在用户接入CDMA2000且系统是由AAA分配IP地址时,PDSN也可以在向AAA认证之前就通过用户的IMSI查询其WLAN的接入记录,如果查到,说明该用户是跨网络切换用户,PDSN就可以在认证请求报文中通知AAA不分配IP地址,如果没有查到,则通知AAA分配IP地址。 The present invention, in the above embodiments, various changes can also be, for example, in CDMA2000 and user access when the system is assigned an IP address AAA, the PDSN may be prior to its WLAN AAA authentication query via the subscriber's IMSI access records, if found, indicating that the user is an inter-network handoff users, the PDSN may request notification message in the AAA authentication does not assign an IP address, if not found, then notifies the AAA assign the IP address.

相应的,对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中仍然携带该用户的WLAN接入能力信息;PDSN判断接入认证应答报文中有该用户的WLAN接入能力信息时,如果查询时已经判断其为跨网切换用户,则把该用户切换前使用的IP地址重新分配给该用户,并建立该用户的IMSI和MAC地址索引;如果不是跨网切换的用户,为该用户分配一个新的IP地址,并建立该用户的IMSI和MAC地址索引;如果PDSN判断接入认证报文中没有该用户的WLAN接入能力信息,则为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束。 Accordingly, the integration of the WLAN user CDMA2000, WLAN access to the AAA server still carry the user capability information in the access authentication response packet sent in; the PDSN determines the access authentication response message contains the user's WLAN access capability information when, it is determined if the query has been cross-network handover user, put the user switches the IP address used before re-assigned to the user, and establishes the subscriber's IMSI and the MAC address index; if the user is not cross-network handover, is the user is assigned a new IP address, and establishes the subscriber's IMSI and the MAC address index; PDSN determines if the packet is not the access authentication of WLAN access capability information of the user, allocate a new IP address for the user, establish IMSI index of the user's end.

在为用户分配IP地址的工作由AAA完成时,如果PDSN在为该用户认证后才知道该用户是跨网络切换用户,此时AAA已经为该用户分配了新的IP地址,但PDSN在后续的PPP的IPCP阶段进行IP地址协商时还是采用旧的网络连接中使用的IP地址,而不采用AAA分配的IP地址。 When allocating IP addresses to user work done by the AAA, if the PDSN in it after the user authentication for the user to switch users across the network, this time AAA has been assigned a new IP address for the user, but in subsequent PDSN still using the old IP address of the network connection used when the PPP IPCP IP address negotiation stage, without the use of AAA assigned IP address. 为了使AAA能够加快回收这个已分配但未使用的IP地址,PDSN可以向AAA发送一个对应于该IP地址但计费信息为0的计费终止报文。 In order to be able to accelerate the recovery AAA IP address of the allocated but unused, PDSN may send an IP address corresponding to the billing information to the billing 0 but terminating packets to the AAA.

另外,如果为用户分配IP地址的工作由AAA完成,AAA也不需要去判断用户是否发生了跨网络切换,该工作还是由PDSN完成。 In addition, if you assign IP addresses to user work done by AAA, AAA does not need to judge whether the user has occurred across a network switch, or the work done by the PDSN.

Claims (11)

1.一种WLAN融合CDMA2000用户从CDMA2000跨网切换到WLAN时保持IP地址不变的方法,包括以下步骤:(a)用户接入WLAN分组网络;(b)PDSN向AAA服务器进行该用户的接入认证;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的IMSI;(d)PDSN判断所述接入认证应答报文中是否携带有该用户的IMSI,如果是,执行下一步,否则,执行步骤(h);(e)PDSN根据所述IMSI查询该用户的CDMA2000的接入记录,如果查到,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束;(h)PDSN为该用户分配一个新的IP地址,建立该用户的MAC地址索引,结束。 A method WLAN fusion CDMA2000 user IP address remains unchanged when switching from the WLAN to inter-CDMA2000 network, comprising the steps of: (a) the user access to a WLAN packet network; (b) PDSN for the user access to the AAA server the authentication; (c) fusion of the WLAN user CDMA2000, AAA server in the access authentication response packet sent carried in the user's IMSI; (d) PDSN determines the access authentication response packet if the user carries IMSI, and if so, the next step, otherwise, performing step (h); (e) PDSN CDMA2000 access records of the user according to the IMSI inquiry, if found, the next step, otherwise, performing step (g) ; (f) PDSN IP address used before the handover of the user re-assigned to the user, the user's index to establish IMSI, end; (g) PDSN for the user to assign a new IP address, IMSI establishing the index of the user, end; (h) PDSN for the user to assign a new IP address, MAC address index to establish the user's end.
2.如权利要求1所述的方法,其特征在于,所述步骤(c)中,AAA服务器还为该用户分配一个新的IP地址,在所述步骤(g)和(h)中,再由PDSN将该新的IP地址分配给该用户,而在所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址,仍将所述该用户切换前使用的IP地址分配给该用户。 2. The method according to claim 1, wherein said step (c) is, the AAA server also assigns a new IP address for the user, in said step (g) and (H), then assigned by the PDSN new IP address to the user, and in said step (f) are, without using PDSN IP address assigned to the AAA server, the IP address will switch between the front of the user assigned to the user.
3.如权利要求2所述的方法,其特征在于,所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址时,还向AAA服务器发送一个对应于该IP地址但计费信息为0的计费终止报文。 3. The method according to claim 2, wherein said step (f) are, without using the PDSN IP address assigned to the AAA server, the AAA server also transmits to the IP address corresponding to the accounting information but 0 billing termination message.
4.如权利要求1所述的方法,其特征在于,所述步骤(f)和(g)中,还建立该用户的MAC地址索引。 4. The method according to claim 1, wherein said step (f) and (g), further establishing the MAC address of the user's index.
5.一种WLAN融合CDMA2000用户从WLAN跨网切换到CDMA2000时保持IP地址不变的方法,包括以下步骤:(a)用户接入CDMA2000分组网络;(b)PDSN向AAA服务器进行该用户的接入认证;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的WLAN接入能力信息;(d)PDSN判断所述接入认证应答报文中是否有该用户的WLAN接入能力信息,如果有,执行下一步,否则执行步骤(g);(e)PDSN根据该用户的IMSI或MAC地址查询其WLAN网络的接入记录,如果查到,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一个新的IP地址,建立该用户的IMSI索引,结束。 A WLAN fusion process remains the same IP address when the user switches from a CDMA2000 network to the WLAN inter-CDMA2000, comprising the steps of: (a) user access CDMA2000 packet network; (b) PDSN for the user access to the AAA server the authentication; (c) fusion of the WLAN user CDMA2000, AAA server carries the access capability information of the WLAN user in the access authentication response packet sent in; (d) PDSN determines whether a the access authentication response packet WLAN access capability information of the user, and if so, the next step, otherwise performing step (g); (e) PDSN query the WLAN access recorded according to the user's IMSI or MAC address, if found, the execution step, otherwise, performing step (g); (f) PDSN assigns a new IP address of the user before switching the use to the user, the user's index to establish IMSI, end; (g) PDSN the user is assigned a new IP address, IMSI establish the index of the user's end.
6.如权利要求5所述的方法,其特征在于,所述步骤(c)中,AAA服务器返回信息中包含该用户有效的MAC地址,所述步骤(f)和(g)中,还建立该用户的MAC地址索引。 6. The method according to claim 5, wherein said step (c) in the AAA server returns a valid user information includes the MAC address, said step (f) and (g), it is also established index of the user MAC address.
7.如权利要求5所述的方法,其特征在于,所述步骤(c)中,AAA服务器还为该用户分配一个新的IP地址,在所述步骤(g)中,再由PDSN将该新的IP地址分配给该用户,而在所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址,仍将所述该用户切换前使用的IP地址分配给该用户。 7. The method according to claim 5, wherein said step (c) in the AAA server also assigns a new IP address for the user, in said step (g), and then by the PDSN the new IP address assigned to the user, and in said step (f) are, without using the PDSN IP address assigned by the AAA server, an IP address before handover of the user will use the assigned to the user.
8.如权利要求7所述的方法,其特征在于,所述步骤(f)中,PDSN不采用AAA服务器分配的IP地址时,还向AAA服务器发送一个对应于该IP地址但计费信息为0的计费终止报文。 8. The method according to claim 7, wherein said step (f) are, without using the PDSN IP address assigned to the AAA server, the AAA server also transmits to the IP address corresponding to the accounting information but 0 billing termination message.
9.如权利要求5所述的方法,其特征在于,所述步骤(c)中的接入能力信息指有效或无效的MAC地址。 9. The method according to claim 5, wherein said step (c) the access capability information refers to the MAC address valid or invalid.
10.一种WLAN融合CDMA2000用户从WLAN跨网切换到CDMA2000时保持IP地址不变的方法,包括以下步骤:(a)用户接入CDMA2000分组网络;(b)PDSN根据用户的IMSI查询其WLAN的接入记录,如果查到,说明该用户是跨网切换用户,在向AAA服务器进行该用户的接入认证时,通知AAA服务器不为该用户分配IP地址,如果查不到,则在向AAA服务器进行接入认证时通知AAA服务器为该用户分配IP地址;(c)对WLAN融合CDMA2000用户,AAA服务器在发出的接入认证应答报文中携带该用户的WLAN接入能力信息;(d)PDSN判断所述接入认证应答报文中是否有该用户的WLAN接入能力信息,如果有,执行下一步,否则执行步骤(g);(e)如果在步骤(b)判断出该用户是跨网切换用户,执行下一步,否则,执行步骤(g);(f)PDSN把该用户切换前使用的IP地址重新分配给该用户,建立该用户的IMSI索引,结束;(g)PDSN为该用户分配一 10. A method for maintaining WLAN fusion CDMA2000 user the same IP address when a handover from the WLAN to inter-CDMA2000 network, comprising the steps of: (a) user access CDMA2000 packet network; (b) PDSN its WLAN query based on the user's IMSI access records, if found, indicating that the user is an inter-network handover user, the user at the time of access authentication to the AAA server notifies the AAA server does not assign an IP address for the user, if finding out, at the AAA performing access authentication server notifies the AAA server assigns an IP address for the user; (c) fusion of the WLAN user CDMA2000, AAA server carries the access capability information of the WLAN user in the access authentication acknowledgment message sent in; (d) PDSN determines whether the WLAN access capability information of the user of the access authentication response packet, and if so, the next step, otherwise performing step (g); (e) if in step (b) determines that the user is inter-network handover user, the next step, otherwise, performing step (g); IP address (f) PDSN used before switching to the user assigned to the user to re-establish the user's IMSI index, ending; (g) PDSN is the user is assigned a 个新的IP地址,建立该用户的IMSI索引,结束。 A new IP address, IMSI establish the index of the user's end.
11.如权利要求10所述的方法,其特征在于,所述步骤(c)中,AAA服务器返回信息中包含该用户有效的MAC地址,所述步骤(f)和(g)中,还建立该用户的MAC地址索引。 11. The method according to claim 10, wherein said step (c) in the AAA server returns a valid user information includes the MAC address, said step (f) and (g), it is also established index of the user MAC address.
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