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A host base station, a relay node device, and a method for enhancing path switching

A technology of path switching and host base station, which is applied in the directions of wireless communication, network topology, electrical components, etc., and can solve the problem that the system can no longer provide normal services for the UE.

Active Publication Date: 2017-04-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the RN handover execution stage (that is, leaving the source base station and accessing the target base station), the connection between the RN and the source base station is interrupted; after the path switching process of the RN is completed, the X2 forwarding interface between the source base station and the target base station is also released. That is to say, after the RN handover is completed, the UE served by the RN will no longer obtain downlink data packets, that is, the downlink data transmission is interrupted, and the system can no longer provide normal services for the UE.

Method used

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  • A host base station, a relay node device, and a method for enhancing path switching
  • A host base station, a relay node device, and a method for enhancing path switching
  • A host base station, a relay node device, and a method for enhancing path switching

Examples

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Embodiment 1

[0043] This embodiment provides a method for enhancing path switching. After the RN switches the donor base station, the RN or its switched target donor base station sends the downlink bearer information that needs to be converted to the user equipment still residing in the RN cell to the user. The mobility management entity MME of the device requests the MME to switch the end point of the downlink data tunnel for the user equipment. That is, the target DeNB or RN establishes or updates the conversion downlink path and corresponding bearer information for the UE that still resides in the RN cell.

[0044] Wherein, the RN or the target donor base station can send the downlink bearer information that needs to be changed by the user equipment that still resides in the RN cell to its MME through a path switch request (PATH SWITCH REQUEST) message. Specifically, at least the information contained in the PATHSWITCH REQUEST message includes the S1 interface identifier (eNB UES1AP ID)...

Embodiment 2

[0073] This embodiment introduces a host base station, which can implement the method for adding path switching proposed in Embodiment 1, which includes:

[0074] The first unit, when the relay node RN accesses the host base station through handover, requests path switching to the MME of the RN, and determines whether the path switching of the RN is completed;

[0075] The second unit sends the downlink bearer information that needs to be changed by the user equipment that still resides in the RN cell to the MME of the user equipment after requesting the path switching to the MME of the RN, or after the path switching of the RN is completed.

[0076] Wherein, the second unit may send the downlink bearer information that needs to be changed by the UE that still resides in the RN cell to the MME of the UE through the path switching request message. Specifically, the path switch request message carries the S1 interface identifier of the UE in the target donor base station, the do...

Embodiment 3

[0080] This embodiment introduces a kind of RN equipment, which can implement the method for adding path conversion proposed in Embodiment 1, which includes:

[0081] The first unit obtains the MME of the user equipment still residing in the RN cell from the target donor base station after the current RN equipment is switched to the new donor base station;

[0082] The second unit is to send the downlink bearer information that the user equipment that still resides in the RN cell needs to change to the MME of the user equipment.

[0083] Wherein, the second unit may send the downlink bearer information that needs to be changed by the UE that still resides in the RN cell to the MME of the UE through the path switching request message. Specifically, the path switch request message carries the S1 interface identifier of the UE in the target donor base station, the downlink bearer information of the requested path switch, and the original S1 interface identifier of the UE in its M...

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Abstract

The invention discloses a host base station, relay node equipment and a method for converting downlink data paths for user equipment, and belongs to the field of wireless communication technology. The method disclosed in the present invention includes: after the relay node RN is switched to a new host base station, the RN or the target host base station sends the downlink bearer information that needs to be converted by the user equipment still resident in the RN cell to The mobility management entity MME of the user equipment requests the MME to convert the downlink data tunnel end point for the user equipment. The technical solution of this application switches the downlink data path for the UE still residing in the RN cell when the host base station of the RN is changed and carries out the bearer update accordingly, so that after the RN leaves the source base station and accesses the target base station through the handover procedure, Normal communication services can still be provided for UE.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular to a donor base station, a relay node device, and a method for converting a downlink data path for a user equipment (User Equipment, UE). Background technique [0002] In a mobile communication system, an eNB (evolved NodeB, evolved base station) may need to handover certain (some) UE(s) to a certain cell under another base station according to the wireless environment or cell load, so that the UE can obtain better service. The handover process and the data transmission flow between nodes during the handover are as follows: figure 1 shown. [0003] Step 101: If the source base station decides to switch it to a certain cell (target cell) under a certain eNB (target base station) according to the measurement report result of the UE, then the source base station sends a handover request message to the target base station to inform it of the UE's The resour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/08H04W36/18
CPCH04W84/047H04W36/0058H04W36/0064
Inventor 王昕陈琳
Owner ZTE CORP
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