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A switching method and system

A target, downlink data technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as unfavorable cost saving, blocked terminal services, waste of carrier transmission and bearer resources, etc., to reduce the possibility of network congestion performance, saving transmission bearer resources, and improving service experience

Active Publication Date: 2016-12-14
射阳县兴桥红星纺织工业园管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, circuitous routing will lead to a waste of the carrier's transmission resources, which is not conducive to saving costs; on the other hand, it increases the delay between the terminal and the communication peer to send and receive IP data packets, which is not conducive to improving the user's service experience; on the other hand, it is Increases the possibility of network congestion when the terminal's IP packets are transmitted on the network, causing terminal services to be blocked or even impossible (for example, real-time services such as voice and video)

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] In this embodiment, during the anchor point replacement process, both the S-PDSN and the T-PDSN perform the dual data transmission function to ensure uninterrupted services and data integrity.

[0077] Such as Figure 4 As shown, the main steps of this embodiment are specifically described as follows:

[0078] Steps S401-S404: Same as steps S301-S304.

[0079] After step S404, according to the existing technology, after the downlink data arrives at the S-PDSN, it will be dual-transmitted to the source side and the target side at the same time.

[0080]Step S405: the S-PDSN sends the RRP message of the P-P interface to the T-PDSN as a response to step S404.

[0081] In the response message, S-PDSN sends all information related to the terminal, such as user context, authentication context and PPP context, to T-PDSN.

[0082] In this message, the S-PDSN sends the AID to the T-PDSN; or, the T-PDSN can query the AID mapping server to obtain the AID according to the termin...

Embodiment 2

[0094] In this embodiment, only the S-PDSN performs the dual data transmission function during the anchor point replacement process to ensure data integrity. In addition to indicating the switch of the dual-transmission function, the S bit is also used to indicate the timing of T-PDSN and / or S-PDSN external announcement. For the specific implementation of the announcement, refer to the description of Embodiment 1.

[0095] Such as Figure 5 As shown, the main steps of this embodiment are specifically described as follows:

[0096] Steps S501-S504: Same as steps S301-S304.

[0097] After step S504 is completed, the downlink data will be dual-transmitted to the source side and the target side at the same time after reaching the S-PDSN according to the existing technology.

[0098] Step S505: the S-PDSN sends the RRP message of the P-P interface to the T-PDSN as a response to step S504.

[0099] In the response message, S-PDSN sends all information related to the terminal, su...

Embodiment 3

[0110] In this embodiment, during the replacement process of the anchor point, the dual transmission function is completely canceled, and all data packets received during the switching process are sent to the target side. If the link establishment of the target side has not been completed, the data packets Temporarily cache, and then send the data after the link is opened.

[0111] Such as Figure 6 As shown, the main steps of this embodiment are specifically described as follows:

[0112] Steps S601-S604: same as steps S301-S304.

[0113] After step S604 is completed, although the S-PDSN has received the S bit set to 1, the downlink data is only sent to the target side through the P-P interface after arriving at the S-PDSN, and the target side sends it to the T-RAN or T-PDSN cache.

[0114] Step S605: the S-PDSN sends the RRP message of the P-P interface to the T-PDSN as a response to step S604.

[0115] In the response message, S-PDSN sends all information related to the ...

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Abstract

The invention discloses a handover method and system. The method includes: when a terminal is handover across PDSNs in a CDMA system, after the P-P interface connection between the source PDSN and the target PDSN is established, the target PDSN is announced to receive downlink data; When the target PDSN receives the downlink data of the terminal, it sends it to the target RAN; or, it sends it to the target RAN and the source PDSN at the same time. By adopting the invention, the data forwarding in the cross-PDSN switching process is realized, and the problems such as detour of the data flow route caused by the fixed anchor point are avoided.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a handover method and system. Background technique [0002] The 3rd Generation Partnership Project 2 (3rd Generation Partnership Project 2, referred to as 3GPP2) code division multiple access system (Code Division Multiple-Access, referred to as CDMA) is mainly composed of radio access network (Radio Access Network, referred to as RAN), Packet Data Serving Node (referred to as PDSN), RADIUS server (Remote Authentication Dial In User Service, referred to as Remote User Dial In User Service) and other support nodes. [0003] figure 1 It is a schematic diagram of a CDMA system architecture in the prior art. Among them, the PDSN is responsible for the management and operation of the control plane and the user plane. On the control plane, the PDSN is responsible for terminal mobility management, user context management, etc.; on the user plane, the PDS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/06H04W36/14H04W60/00
Inventor 毕以峰周娜张世伟骆文
Owner 射阳县兴桥红星纺织工业园管理有限公司
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