Method, system and device for realizing data forward shifting in user terminal switching process

A terminal switching and terminal technology, applied in the communication field, can solve the problems of wasting Un port resources, increasing switching delay, and destroying user experience.

Active Publication Date: 2011-03-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method will waste the resources of the Un port, increase the switching delay,...

Method used

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  • Method, system and device for realizing data forward shifting in user terminal switching process
  • Method, system and device for realizing data forward shifting in user terminal switching process
  • Method, system and device for realizing data forward shifting in user terminal switching process

Examples

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Embodiment 1

[0075] see Figure 4 As shown, in this embodiment, the specific process of UE handover under RN is as follows:

[0076] Steps 400-401: The source RN and the serving gateway perform area restriction acquisition, and the source RN sends a measurement control message to the terminal. During this process, the UE performs data services between the source RN and the serving gateway.

[0077] Steps 402a-402b: the source RN sends uplink resource allocation information to the UE, and the UE sends a measurement report to the source RN.

[0078] Step 403: The source RN makes a judgment based on the measurement report and the RRM information, and decides whether the UE needs to be handed over.

[0079] Step 404a: If it is determined that the UE needs to be handed over, the source RN sends a handover request message to the target node through the D-eNB, which carries necessary information to prepare for the handover on the target side.

[0080] Step 404b: Once the D-eNB detects that the ...

example 2

[0097] see Figure 5 As mentioned above, the specific process of switching in this embodiment is as follows:

[0098] Steps 500-501: The source RN and the serving gateway perform area restriction acquisition, and the source RN sends a measurement control message to the terminal. During this process, the UE performs data services between the source RN and the serving gateway.

[0099] Steps 502a-502b: the source RN sends uplink resource allocation information to the UE, and the UE sends a measurement report to the source RN.

[0100] Step 503: The source RN makes a judgment based on the measurement report and the RRM information, and decides whether the UE needs to be handed over.

[0101] Step 504: If it is determined that the UE needs to be handed over, the source RN sends a handover request message to the target node through the D-eNB, which carries necessary information to prepare for handover on the target side.

[0102] Step 505: The target node performs admission contr...

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PUM

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Abstract

The invention discloses a method, system and device for realizing data forward shifting in the user terminal switching process, which can improve the terminal switching speed under a relay node and can reduce the data loss rate while switching. The method comprises the following steps of: notifying the stopping position of the terminal downlink data requiring the source relay node forward shifting to the terminal attributive source relay node when an attributive base station of a source relay node confirms that a terminal is about to generate the switching; and sending the forwards shifted downlink data of the terminal from the source relay node, the current buffer stored downlink data of the terminal which is not sent to the source relay node, and the subsequently received downlink data of the terminal from a core network to a target node.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system and device for realizing data forwarding during user terminal handover. Background technique [0002] In the third-generation mobile communication 3GPP Advanced Long-Term Evolution (LTE-Advanced) system, the relay (Relay) cooperative transmission method will be used to improve the service quality of the cell edge users and expand the cell coverage. The introduction of a relay node (Relay Node, hereinafter referred to as RN) makes the mobility of a terminal (UE) more complicated, and the UE may have multiple handover modes between the RN and the base station (eNB). [0003] see figure 1 As shown, in the R8 specification in the prior art, the typical internal handover process between the MME and the serving gateway is specifically as follows: [0004] Steps 100-101: The source eNB and the serving gateway perform area restriction acquisition, and th...

Claims

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Application Information

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IPC IPC(8): H04W36/02H04W36/08
CPCH04W28/04H04W84/045H04W88/04H04W36/0033H04W36/12
Inventor 刘佳敏鲍炜房家奕
Owner DATANG MOBILE COMM EQUIP CO LTD
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