WO2005109915A1 - Procede de mise a jour de zone d'acheminement dans mbms - Google Patents

Procede de mise a jour de zone d'acheminement dans mbms Download PDF

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Publication number
WO2005109915A1
WO2005109915A1 PCT/CN2005/000636 CN2005000636W WO2005109915A1 WO 2005109915 A1 WO2005109915 A1 WO 2005109915A1 CN 2005000636 W CN2005000636 W CN 2005000636W WO 2005109915 A1 WO2005109915 A1 WO 2005109915A1
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WO
WIPO (PCT)
Prior art keywords
sgsn
context
mbms
current
original
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PCT/CN2005/000636
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English (en)
Chinese (zh)
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WO2005109915A8 (fr
Inventor
Hai Zhang
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Huawei Technologies Co., Ltd.
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Publication of WO2005109915A1 publication Critical patent/WO2005109915A1/fr
Publication of WO2005109915A8 publication Critical patent/WO2005109915A8/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the present invention relates to a route update technology, and particularly to a method for updating a routing area in a multimedia broadcast / multicast service (MBMS) service.
  • MBMS multimedia broadcast / multicast service
  • the third-generation mobile communication can provide services with higher data rates than the second-generation mobile communication, thereby supporting a variety of business forms. Services such as video calls, picture downloads, and high-speed Internet browsing.
  • Services such as video calls, picture downloads, and high-speed Internet browsing.
  • One type of service is characterized by: The service can be sent to users who have subscribed to the service in the wireless network at the same time. For example, weather forecasts, news clips, highlights of sports games, and so on. Taking advantage of the simultaneous transmission of these services, the third-generation mobile communication introduced the concept of broadcast / multicast.
  • an intermediate node such as node 10
  • its upstream node always sends a copy of data to the intermediate node; the intermediate node 10 receives After data is copied, the data is copied according to the number of downstream nodes that expect to receive the data, and the data is distributed to each downstream node that expects to receive the data.
  • the nodes that are expected to receive data downstream of node 10 include node 101 and node 102, node 10. Make two copies of the received data.
  • each branch of the broadcast / multicast service data transmission tree has only one piece of data for transmission, and occupies one piece of transmission resources, as does the data transmission of the root node and its downstream nodes.
  • the difference between the multicast service and the broadcast service is only that: the multicast service only sends corresponding information to users who have subscribed to certain information, and the broadcast service sends information to all users in the wireless network. It can be seen from the above description that the same information can be provided to a large number of users through the broadcast / multicast service at the same time, which can greatly save network resources.
  • FIG. 2 is a schematic diagram of a wireless network structure supporting broadcast / multicast services.
  • the wireless network entity supporting the broadcast / multicast service in the 3rd Generation Partnership Project (3GPP) is the broadcast / multicast service center (BM-SC) 201 through the Gmb interface or the Gi interface and the gateway General Packet Radio Service (GPRS) support node (GGSN, Gateway GPRS Support Node) 202 is connected, one BM-SC 201 can be connected to multiple GGSN 202; GGSN 202 is connected to a serving GPRS support node (SGSN, Serving GPRS Support Node) 203 through a Gn / Gp interface, and one GGSN 202 Can be connected to multiple SGSN 203; SGSN 203 can be connected to Universal Mobile Telecommunications System (UMTS) Land Radio Access Network (UTRAN) 204 through Iu interface, and then UTRAN 204 is connected to UE (UE) 206 through Uu interface, SGSN 203 may also be connected to the 3r
  • MBMS registration refers to: In a wireless communication network, a downstream node notifies its upstream node that it wants to receive session attributes and specific MBMS service data, so that the upstream node can continue to distribute the data to downstream downstream nodes. the process of. This process creates a release tree that originates from the BM-SC and suspends to the UE that expects data, sending MBMS session attributes and data. The result of this process is to establish a corresponding MBMS bearer context at each node along the release tree.
  • the BM-SC can target the bearer capacity required for an MBMS bearer service, such as: identifying the minimum bearer capacity required by the UE to receive the MBMS bearer service, that is, the maximum QoS capability that the MBMS bearer service may use, Send to GGSN and SGSN.
  • the bearer capacity required for an MBMS bearer service such as: identifying the minimum bearer capacity required by the UE to receive the MBMS bearer service, that is, the maximum QoS capability that the MBMS bearer service may use, Send to GGSN and SGSN.
  • the established MBMS bearer context is used to save the MBMS bearer capability.
  • the MBMS bearer context contains all information descriptions that define an MBMS bearer service bearer.
  • the MBMS bearer context is created at all nodes that carry MBMS data. As shown in Table 1, the MBMS bearer context includes: IP multicast address, access point name (APN), temporary mobile group identifier Identification (TMGI), state (State), required MBMS carrying capacity, QoS, MBMS service area, downstream node list, number of UEs, etc.
  • the IP multicast address identifier is the MBMS bearer described by the MBMS bearer context; APN is the access point name for which the IP multicast address has been defined; TMGI is the temporary mobile group identifier assigned to the MBMS bearer; State is the MBMS bearer
  • the active state includes: a static state or an active state, identifying whether a bearer plane resource for MBMS data transmission is required to be established; the required MBMS bearer capability is used to identify the minimum bearer capability that the UE needs to support; QoS is the required MBMS bearer Quality of service; MBMS service area is the area where MBMS bearer services need to be sent; Downstream node list is the list of downstream nodes to which MBMS bearers have been requested, and MBMS data must be delivered; The number of UEs is in this section. Points owned by the node have already joined the MBMS The number of UE sites carrying services. "X" in the table indicates that the information is stored on the corresponding network entity.
  • IP multicast address identifies the MBMS bearer described by the MBMS bearer X X X bearer context
  • the active state carried by the MBMS ('Waiting for study X X X only, or' active, '
  • a UE When a UE activates the MBMS bearer service, and the UE needs to perform a routing area update and change the service SGSN due to movement, it directly performs the routing area update process between SGSNs given in the 3GPP 23.060 standard. The execution of this process does not consider whether the MBMS session is being executed, and any processing of the packet data protocol (PDP) context established by the UE is consistent with the process without MBMS.
  • PDP packet data protocol
  • the process of updating the routing area between SGSNs by the UE includes the following steps :
  • Step 301 After a UE activates the MBMS bearer service, it sends a Routing Area Update Request message to the new SGSN via the Radio Access Network (RAN);
  • RAN Radio Access Network
  • Step 302 After the new SGSN receives the routing area update request, it sends an SGSN Context Request message to the original SGSN to obtain the mobility management (MM) context, PDP context, and MBMS UE context of the UE; the original SGSN receives After the SGSN context request, return an SGSN context response message SGSN Context Response carrying the corresponding context of the specified UE to the new SGSN;
  • MM mobility management
  • the original SGSN may return the MBMS UE context, the MM context, and the PDP context of the designated UE, and may also return the MBMS UE context and the MM context of the designated UE; where for the MBMS UE context, the UE will have one for each MBMS bearer service that it joins.
  • MBMS UE context, and for MM context mobility management is performed for each UE, and the SGSN creates and saves the MM context for each UE belonging to it;
  • Step 303 After receiving the response, the new SGSN may perform an encryption function between itself and the UE, and between itself and the home location register (HLR) through interaction with the UE and the HLR. This step is optional;
  • Step 304 After receiving the SGSN context response, the new SGSN sends an SGSN Context Acknowledge message to the original SGSN.
  • Step 305 After receiving the SGSN context confirmation message of the new SGSN, the original SGSN buffers the received N-PDU for a period of time and sends it to the new SGSN through the forward packet message Forward Packets; this step is also optional ;
  • Step 306 the new SGSN sends an update PDP context request message Update PDP Context. Request to the corresponding GGSN; the GGSN updates the relevant information of the user's PDP context, and feeds back an update PDP context response Update PDP Context Response to the new SGSN, the response may be Carry the corresponding PDP context update information;
  • Step 307 The new SGSN sends an Update MBMS UE Context Request to the corresponding GGSN; the GGSN updates the corresponding fields of these MBMS UE contexts related to the user, and returns an Update MBMS UE Context Response to the new SGSN, the response may carry corresponding MBMS UE context update information;
  • Step 308 The new SGSN sends a location update message Update Location to the HLR to notify the HLR of the change of the serving SGSN of the UE;
  • Step 309 The HLR sends a location cancellation message Cancel Location to the original SGSN, and the original SGSN deletes the MM context and the PDP context, and the original SGSN returns a location cancellation confirmation message Cancel Location Ack to the HLR;
  • a timer is actually set and started in step 302, and then a judgment is made in this step. If the corresponding timer started in step 302 expires, When the context is deleted, otherwise, wait for ' Delete the context after the timer expires to ensure that the relevant context is deleted after it is received by the new SGSN;
  • Step 310 After receiving the confirmation, the HLR sends an insert user data message Insert. Subscriber Data to the new SGSN. After receiving the new SGSN, it creates the corresponding MM context and returns the insert user data confirmation Insert Subscriber Data Ack to the HLR;
  • Step 311 The HLR returns a location update confirmation message Update Location Ack to the new SGSN;
  • UE context for a certain MBMS bearer service the list of downstream nodes corresponding to the MBMS bearer context is If empty, the original SGSN sends an MBMS Deregistration Request to the GGSN; the GGSN responds with an MBMS Deregistration Response and deletes the identity of the original SGSN from the downstream node list parameter in its own MBMS bearer context; otherwise No. Perform this step;
  • Step 313 The new SGSN verifies that each MBMS UE context received has a corresponding MBMS bearer context. If the new SGSN does not have a corresponding MBMS bearer context, the new SGSN creates an MBMS bearer context and sets the created MBMS bearer context to Standby status, and send MBMS registration request MBMS Registration Request to the corresponding GGSN; GGSN returns MBMS registration request MBMS Registration Response to the new SGSN; if the new SGSN has the corresponding MBMS bearer context, this step is not performed; Step 314: The new SGSN is The UE establishes an MM context, and a 'logical link' between the UE and the new SGSN is established, and the new SGSN feeds back a routing area update acceptance message to the UE.
  • Step 315 After receiving the routing area update acceptance message, the UE returns a routing area update complete message to the SGSN.
  • the main object of the present invention is to provide a method for updating the routing area in an MBMS service, which can eliminate the continuous accumulation of redundant MBMS UE contexts in the original SGSN, and avoid system collapse.
  • a further object of the present invention is to provide a method for updating a routing area in an MBMS service, so as to reduce redundant occupation of transmission resources of a core network.
  • a method for updating a routing area in a multimedia broadcast / multicast service MBMS service includes: after a current UE sends a routing area update request to a new SGSN, the new SGSN obtains relevant context information of the current UE from the original SGSN, and interacts with the corresponding GGSN to update The relevant context of the current UE, and then the new SGSN and the original SGSN complete the update of the current UE-related data information with the HLR.
  • the key is that when the current UE-related data information is updated between the original SGSN and the HLR, the original SGSN is deleted at the same time MM context, PDP context, and all MBMS UE contexts of the current UE in itself.
  • the new SGSN and the original SGSN respectively complete current UE-related data with the HLR.
  • the update of the data information specifically includes:
  • the new SGSN sends a location update message to the HLR. After receiving the HLR, it sends a location cancellation message to the original SGSN.
  • the original SGSN After the original SGSN receives the location cancellation message, it deletes the MM of the current UE in itself. Text, PDP context and all MBMS UE contexts, and return the location cancellation confirmation to the HLR; al3. After receiving the location cancellation confirmation, the HLR sends a Insert User Data message to the new SGSN, the new SGSN creates the corresponding MM context, and returns the Insert User to the HLR Data confirmation
  • the HLR After receiving the confirmation of inserting user data, the HLR returns the location to the new SGSN to cancel the confirmation.
  • the original SGSN further determines whether the original SGSN has an MBMS UE context corresponding to the current MBMS bearer service. If it exists, it continues to perform step al3; if it does not exist, the original SGSN interacts with the corresponding GGSN. Deregister on the corresponding GGSN ', and then execute step al3.
  • the related context information of the current UE is the MBMS UE context of the current UE and the MM context of the current UE; or the MBMS UE context of the current UE, the MM context of the current UE, and the PDP context of the current UE.
  • the acquiring the related context information of the current UE from the original SGSN by the new SGSN further includes:
  • the new SGSN sends an SGSN context request to the original SGSN. After receiving the request, the original SGSN returns the relevant context information of the current UE contained in itself to the new SGSN through the SGSN context response;
  • the new SGSN After the new SGSN receives the response carrying the current context information of the UE, it sends an SGSN context confirmation to the original SGSN.
  • the interaction with the corresponding GGSN to update the relevant context of the current UE further includes:
  • the new SGSN sends a PDP context update request to the corresponding GGSN, and the corresponding GGSN updates the PDP context of the current UE after receiving the request, and returns a PDP context update response to the new SGSN;
  • the new SGSN sends a request to update the MBMS UE context to the corresponding GGSN.
  • the corresponding GGSN updates all MBMS UE contexts of the current UE, and sends the request to the new SGSN. Returns the update MBMS UE context response.
  • the original SGSN deletes the MM context and PDP context of the corresponding UE
  • the original SGSN deletes all MBMS UE contexts of the corresponding UE. Eliminate the continuous accumulation of useless MBMS UE contexts in the original SGSN to avoid system crash.
  • the present invention can further advance the de-registration process of the original SGSN during the routing area update process, thereby avoiding the redundant occupation of the core network transmission resources due to the late de-registration timing.
  • Figure 1 is a schematic diagram of the transmission principle of a multicast service
  • Figure 2 is a schematic diagram of a wireless network structure supporting broadcast / multicast services
  • FIG. 3 is a flowchart of processing of updating the SGSN routing area in the MBMS service of the prior art
  • FIG. 4 is a flowchart of processing of updating the SGSN routing area in the MBMS service of the invention
  • FIG. 5 is an embodiment of updating the SGSN routing area in the MBMS service of the invention Processing flowchart. Mode of Carrying Out the Invention
  • the basic idea of the present invention is: while the original SGSN deletes the MM context and the PDP context of the current UE, the MBMS UE context is deleted, that is, the original SGSN is added to step 309 of the prior art routing area update processing flow to delete the MBMS UE of the current UE. Context operation to eliminate the continuous accumulation of redundant MBMS UE contexts in the original SGSN.
  • the process of updating the routing area in the MBMS service in the present invention is shown in FIG. 4 and includes the following steps:
  • Step 401 After a UE activates the MBMS bearer service, it sends a Routing Area Update Request message to the new SGSN via the Radio Access Network (RAN).
  • Step 402 After the new SGSN receives the routing area update request, it sends an SGSN Context Request message to the original SGSN to obtain the MM context, PDP context, and MBMS UE context of the UE.
  • RAN Radio Access Network
  • the original SGSN may return the MBMS UE context, MM context, and PDP context of the specified UE, and may also return the MBMS UE context and MM of the specified UE Context
  • Step 403 After the new SGSN receives the response, it can perform the encryption function between itself and the UE, and between itself and the home location register (HLR) through interaction with the UE and the HLR. This step is optional;
  • Step 404 After the new SGSN receives the SGSN context response, it sends an 'SGSN Context Acknowledge message to the original SGSN;
  • Step 405 After receiving the SGSN context confirmation message of the new SGSN, the original SGSN buffers the received N-PDUs for a period of time and sends them to the new SGSN through the forward packet message Forward Packets; this step is also optional ;
  • Step 406 The new SGSN sends an Update PDP Context Request message to the corresponding GGSN; the GGSN updates the related information of the user's PDP context and feeds back an Update PDP Context Response to the new SGSN, which may carry Have the corresponding PDP context update information;
  • Step 407 The new SGSN sends an Update MBMS HE Context Request to the corresponding GGSN; the GGSN updates the corresponding fields of these MBMS HE contexts related to the user, and returns an Update MBMS UE Context Response to the new SGSN, the response may carry corresponding MBMS UE context update information;
  • Step 408 The new SGSN sends a location update message Update Location to the HLR, notifying HLR change of the UE's serving SGSN ';
  • Step 409 The HLR sends a location cancellation message Cancel Location to the original SGSN, and the original SGSN deletes the UE's MM context, PDP context, and all MBMS UE contexts, and the original SGSN returns a location cancellation confirmation message Cancel Location Ack to the HLR;
  • Step 410 After receiving the confirmation, the HLR sends a Insert User Data message to the new SGSN; after receiving the new SGSN, the corresponding MM context is created, and the insert user data confirmation is returned to the Insert Subscriber Data Ack to the HLR;
  • Step 411 The HLR returns a location update confirmation message Update Location Ack to the new SGSN; 'Step 412: If the original SGSN no longer has an MBMS UE context for a certain MBMS bearer service, the list of downstream nodes of the corresponding MBMS bearer context is If empty, the original SGSN sends an MBMS Deregistration Request to the GGSN; the GGSN responds with an MBMS Deregistration Response and deletes the identity of the original SGSN from the downstream node list parameters in its own MBMS bearer context; otherwise , Do not perform this step;
  • Step 413 The new SGSN verifies whether each MBMS UE context received has a corresponding MBMS bearer context. If the new SGSN does not have a corresponding MBMS bearer context, the new SGSN creates an MBMS bearer context and sets the created MBMS bearer context to The standby state, and sends an MBMS registration request MBMS Registration Request to the corresponding 'GGSN; the GGSN returns an MBMS registration request MBMS Registration Response to the new SGSN; if the new SGSN has a corresponding MBMS bearer context, this step is not performed; Step 414: The new SGSN establishes the MM context for the UE, the logical link between the UE and the new SGSN is established, and the new SGSN feeds back to the UE a Routing Area Update Accept message Routing Area Update Accept;
  • Step 415 After receiving the routing area update acceptance message, the UE returns a routing area update complete message to the SGSN.
  • the present invention can further advance the de-registration process of the original SGSN, that is, step 312 of the prior art routing area update process flow is referred to before step 310 to reduce the redundant occupation of core network transmission resources.
  • step 312 of the prior art routing area update process flow is referred to before step 310 to reduce the redundant occupation of core network transmission resources.
  • the process of updating the routing area in the MBMS service is shown in FIG. 5 and includes the following steps:
  • Steps 501 to 509 It is exactly the same as the entire description of steps 401 to 409.
  • Step 510 If the original SGSN no longer has an MBMS UE context for a certain MBMS bearer service, that is, the list of downstream nodes of the corresponding MBMS bearer context is empty, the original SGSN sends an MBMS deregistration request to the GGSN; The GGSN responds to an MBMS Deregistration Response and deletes the identity of the original SGSN from the downstream node list parameter in the MBMS bearer context; otherwise, this step is not performed.
  • Steps 511 to 512 It is exactly the same as the entire description of steps 410 to 411.
  • Steps 513 to 515 Exactly the same as the entire description of steps 413 to 415.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Cette invention concerne un procédé de mise à jour d'acheminemnt dans MBMS, comprenant les opérations suivantes: après UE actue envoi d'une demande RAU à nouveau SGSN, le nouveau SGSN obtenant l'information contextuelle en rapport avec UE actuel de l'ancien SGSN et actualisant l'information contextuelle sur UE actuel par interaction avec le GGSN correspondant, exécuion par le nouveau SGSN et par l'ancien SGSN respectivement de la mise à jour des données d'information concernant l’actuel UE avec HLR, caractérisinformations sur l'UE actuel etre l'ancien SGSN et HLR. Ce proc
PCT/CN2005/000636 2004-05-12 2005-05-09 Procede de mise a jour de zone d'acheminement dans mbms WO2005109915A1 (fr)

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CNA2004100347634A CN1697394A (zh) 2004-05-12 2004-05-12 多媒体广播/组播服务业务中路由区更新的方法
CN200410034763.4 2004-05-12

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CN101064935B (zh) * 2006-04-30 2010-09-29 华为技术有限公司 一种移动终端同时注册两种网络时的位置取消的方法
CN101523938B (zh) 2006-11-03 2012-02-01 华为技术有限公司 移动通信方法、移动通信系统及接入实体
EP2139253B1 (fr) * 2007-03-20 2018-07-25 ZTE Corporation Procédé pour éviter la libération erronée de ressources pendant un transfert intercellulaire
CN101369912B (zh) * 2007-08-13 2011-04-06 大唐移动通信设备有限公司 一种用户设备上下文更新方法与装置
CN101282511B (zh) * 2008-05-16 2011-07-13 中兴通讯股份有限公司 承载处理方法
CN101594608B (zh) * 2008-05-30 2012-08-22 华为技术有限公司 提供安全上下文的方法、移动性管理网元及移动通信系统
CN101600192B (zh) * 2008-06-06 2011-04-27 大唐移动通信设备有限公司 用户上下文同步方法、设备及系统
CN101640670A (zh) * 2008-07-30 2010-02-03 华为技术有限公司 一种gtp消息传输的方法及装置
CN101686522B (zh) * 2008-09-22 2012-04-04 华为技术有限公司 路由优化承载的处理方法、装置
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