Bearer switching method and device

Abstract

The present invention relates to a bearer switching method and device, which are used to realize the resource release process of the bearer that fails to switch between the wireless side and the core network side during the bearer switching process on the core network side, reduce the resource waste of the target SGW for bearer switching, and reduce For the risk that the bearer resources of the handover failure cannot be released, the core network side simplifies the resource release process of the handover failure bearer. The method of the present invention includes: the first core network device receives the message carrying the first bearer information that bearer switching fails and returns from the associated second core network device, wherein the first bearer information included in the message is the wireless side The first bearer information of bearer switching failure, and the first bearer information of core network side bearer switching failure; the first core network device releases the bearer resources of the locally established bearer included in the first bearer information.

Description

technical field [0001] The present invention relates to the communication field, in particular to a bearer switching method and device. Background technique [0002] The intra-network handover process of the Evolved-Universal Terrestrial Radio Access Network (E-UTRAN) based on the X2 handover redirected by the Serving Gateway (SGW), for the bearer and core of the wireless side handover failure The resource release process of the bearer whose handover fails on the network side is initiated by the Mobility Management Entity (MME) after the bearer handover between the wireless side and the core network side is completed. [0003] The following is a detailed introduction to the E-UTRAN intra-network handover process of X2 handover based on SGW redirection. The process is divided into two parts. The first part is the bearer handover process on the radio side and the core network side, and the second part is the bearer handover failure on the radio side. The resource release proc...

AI Technical Summary

Problems solved by technology

[0022] The following disadvantages exist in the E-UTRAN intra-network handover process of X2 handover based on SGW redirection: First, even if the handover target SGW will release the resource During the bearer handover process on the core network side, the handover target SGW still needs to configure resources for the bearer that fails to be handed over on the radio side, which will cause a waste of resources for the handover target SGW; when the resources of the handover target SGW are limited, the handover target SGW The SGW cannot configure resources for the bearer, and thus cannot notify the PGW to update the bearer. At the same time, the SGW still cannot notify the PGW during the subsequent bearer resource release process initiated by the MME; secondly, after the bearer switching process between the wireless side and the core network side , the bearer resource release process initiated by the MME is complicated. The MME needs to distinguish whether the bearer to be released is a default bearer or a dedicated bearer, and initiate different bearer resource release processes respectively. During the bearer resource release process, only the interactive messages of single user signaling At the same time, resource release failures caused by process exceptions also need to be considered. The processing of multiple signaling processes will also increase the risk that bearer resources cannot be released; finally, during the bearer switchover process on the core network side, the switched The target SGW needs to mark the bearer that fails to be processed locally, but cannot release the resources of the bearer, which violates a normal process of the SGW for the bearer establishment process, that is, the principle of releasing the bearer resources for the bearer that fails to be handed over, so that the handover The local processing process of the target SGW is complicated

[0023] To sum up, in the E-UTRAN intra-network handover process of X2 handover based on SGW redirection, the resource release process for the bearer whose handover fails on the radio side and the core network side is completed during the bearer handover process on the radio side and the core network side Finally, it is initiated by the MME uniformly. During the bearer switching process on the core network side, the switching target SGW needs to process the bearer that failed to switch the bearer. ; During the bearer resource release process, it is necessary to release different bearer resources for different types of bearers. During the bearer resource release process initiated by the MME, the SGW fails to notify the PGW to release resources for the bearer that failed to be handed over.

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