Protection method and system for X2 interface switching

A technology for protecting systems and interfaces, applied in the field of communications, can solve the problems of prolonged handover service interruption, waste of transmission resources, poor user experience, etc., to reduce interruption delay, avoid excessive cache data, and improve user experience.

CN102065499AActive Publication Date: 2011-05-18DATANG MOBILE COMM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-05-18

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Abstract

The invention provides a protection method for X2 interface switching, which comprises the following steps: S202. an X2 Interface Application Protocol receives a user equipment context release message of an X2 interface control surface, or a Packet Data Convergence Protocol reversely completes one of multiple messages and waits for another message; and S204. an endmarker protection timer is arranged in a target base station through the Packet Data Convergence Protocol, and then started. The method and system provided by the invention solve the problem of redundant cache data, shorten the time delay of the switching service interruption, and enhance the user experience.
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Description

technical field

[0001] The invention relates to the communication field, in particular to a protection method and system for X2 interface switching. Background technique

[0002] The GPRS tunneling protocol for the userplane (referred to as GTP-U) packet at the user level is carried by the user data protocol (referred to as UDP) protocol data unit (referred to as PDU). The packet is not transmitted reliably, and the "end marker" data packet used for GTP-U control may be lost during transmission. The process description in the 36.300 protocol recommends sending the "end marker" multiple times, but it cannot be solved fundamentally "end marker" missing problem.

[0003] Now, refer to figure 2 Describe the existing protocol and describe the related processing of "end marker" in X2 interface handover.

[0004] Specifically, the source base station "end marker" processing flow is as follows: the user plane packet data convergence protocol (PDCP for short) receives the GTP-U "e...

Examples

Embodiment Construction

[0048] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] Note that both the S1 interface and the X2 interface in the present invention are logical interfaces between devices. Specifically, the S1 interface includes: S1-U (S1 for the user plane, S1 interface user plane interface), which is an eNB and EPC (evolved packet core, evolved packet core network) user plane device S-GW (serving-gateway , the logical interface between the serving gateway), which transmits user plane data between the eNB and the S-GW; and S1-MME (S1 for the control plane, S1 interface control plane interface), which is the eNB and the EPC control plane device MME A logical interface between (mobility management entities, mobility management entities) transmits S1AP protocol signaling messages between the eNB and the MME. In addition, the X2 interface includes: X2-U (X2 for the user plane, X2 interface user plane interface), whic...