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Method for establishing context in multicast service of mobile communication system
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A technology for mobile communication systems and multicast services, which is applied to the establishment of context fields in the multicast services of mobile communication systems, can solve problems such as context establishment, save network resources, speed up the process of activating MBMS user contexts, and improve user experience.
Inactive Publication Date: 2009-03-25
ZTE CORP
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[0078] It can be seen from the above trigger conditions and flow process that in SGSN and GGSN, for a certain MBMS service, in the same flow, the establishment of MBMS bearer context and MBMS user context need to be established, and the establishment of the two contexts is two This is a relatively independent process. The problem with this is that when one context is established and another context fails to be established, the newly established context will be deleted.
[0082] 1. When one context is established and another context fails to be established, the newly established context may be deleted;
[0083] 2. The UE's MBMS bearer capability and the required MBMS bearer capability are checked only on the SGSN, which may lead to unnecessary context establishment
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specific Embodiment 1
[0114] Specific embodiment one: MBMS activation process
[0115] like Figure 5 As shown, this process occurs when a user needs to access a certain MBMS-based service, but the network side has not established the bearer context information related to the service. At this time, the network element SGSN on the network side completes the bearer context by creating a user context message Establish.
[0116] Steps 401-412, same as in "Background Technology" image 3 Description of steps 201-212 in the activation process.
[0117] Step 413: After the SGSN creates the MBMS UE context, it sends a "Request for Creating an MBMS User Context" to a special GGSN (SpecificGGSN), the request contains the parameters required to create the user context, and the indication parameters for creating the bearer context and the UE's MBMS bearer capability parameter.
[0118] Step 414. The special GGSN checks whether there is a corresponding MBMS bearer context. If there is an MBMS bearer context...
specific Embodiment 2
[0126] Specific embodiment two: MBMS relocation process
[0127] like Image 6 As shown, this embodiment optimizes the steps for the new SGSN to interact with the GGSN to establish the MBMS context.
[0128] Steps 501-517, the same as in the background technology Figure 4 Steps 301-317 in the description.
[0129] Step 518, if the new SGSN supports MBMS, for each MBMS UE context received in step 3, the new SGSN sends an update MBMS user context request message to the relevant special GGSN (Specific GGSN) (except the original parameters, and then plus the indicated parameter).
[0130] Step 519, the special GGSN updates the corresponding parts of these MBMS user contexts. If it is detected that there are valid indication parameters, the special GGSN completes the registration function of the new SGSN node, and returns the update MBMS UE context response message containing the information required to create the bearer context. Required information, such as TMGI, etc. The s...
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Abstract
The invention discloses a method to build context in multicast service of mobile communication system, and it builds the loading context of multimedia broadcast service MBMS and the user context of MBMS by the interactive signal between SGSN and GGSN, the method includes: when the SGSN sends the requirement for building the MBMS context or refreshing MBMS context to GGSN, if itself does not have loading context, and the message will take a parameter information which is used to inform the GGSN to build or refresh the user context, and builds the loading context (if have not built), and responses GGSN to build the parameter of loading context. And the message can contain the loading ability of user device, which is used for GGSN to compare the loading ability of MBMS with required loading ability of MBMS. The invention optimizes the process for building context for multicast service.
Description
technical field [0001] The invention relates to a method for more effectively establishing MBMS context in a multimedia broadcast multicast service (MBMS: Multimedia Broadcast / Multicast Service, multimedia broadcast / multicast service) in a mobile communication system. Background technique [0002] In order to effectively utilize mobile network resources, the existing mobile communication system proposes the idea of using multicast broadcast transmission services, that is, MBMS. MBMS provides a point-to-multipoint service in which a data source sends data to multiple users in a mobile network, realizes network resource sharing, and improves network resource utilization, especially air interface resources. [0003] MBMS provides two modes: broadcast mode and multicast mode. MBMS can not only realize plain text low-rate message multicast and broadcast, but also realize multicast and broadcast of high-speed multimedia services. [0004] The network architecture using MBMS un...
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