Handover processing method and system, relay device, and base station

Patent metadata

Field	Value
Publication number	US-9749914-B2
Application number	US-201213408716-A
Country	US
Kind code	B2
Filing date	Feb 29, 2012
Priority date	Sep 3, 2009
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

Embodiments of the present disclosure disclose a handover processing method. The method includes: before a source Donor E-UTRAN Node B (DeNB) makes a handover decision, sending auxiliary information for obtaining a pre-configured parameter; receiving the pre-configured parameter; and performing a handover from the source DeNB to a target DeNB according to the pre-configured parameter. The relay device includes: a first sending module, configured to send, before a source DeNB makes a handover decision, auxiliary information for obtaining the pre-configured parameter; a first receiving module, configured to receive the pre-configured parameter; and a handover module, configured to perform a handover from the source DeNB to a target DeNB according to the pre-configured parameter. According to the embodiments of the present disclosure, the technical problem that the service interruption of the UE controlled by the relay device is prolonged due to a long delay in the handover operation is solved.

First claim

What is claimed is:

1. A relay device for a group handover together with one or more user equipment (UE) processing method, comprising:
pre-configuring a relay device in order that the relay device is handed over in a group handover mode together with one or more user equipment (UE) from a source donor E-UTran Node B (source DeNB) to a target Donor E-UTRAN Node B (target DeNB),
wherein prior to the source DeNB making a handover decision to handover the relay device in a group handover mode together with one or more user equipment (UE) to the target DeNB, the relay device is already in communication to and is in control of the one or more user equipment (UE),
wherein the pre-configuring of the relay device for the group handover processing method, comprising the relay device performing:
directly sending auxiliary information pertaining to the relay device for performing the group handover mode to an operation and maintenance system (OMS) of the relay device in order to obtain a first pre-configured parameter associated with the target DeNB, wherein the first pre-configured parameter comprise at least one of: target cell frequency information, target cell bandwidth information, physical cell identity (PCI) information of a target cell, multicast broadcast single frequency network (MBSFN) subframe configuration information of the target cell, a tracking area identifier (TAI), and public land mobile network (PLMN) identifier information;
receiving the first pre-configured parameter from the OMS of the relay device, wherein the first pre-configured parameter facilitates configuring of the relay device to perform a subsequent handover in the group handover mode together with the one or more UE to the target DeNB which takes place after the source DeNB making the handover decision;

wherein the subsequent handover of the relay device in the group handover mode together with the one or more UE, comprising:
sending by the relay device, a measurement report of the relay device to the source DeNB to initiate the source DeNB to handover the relay device in the group handover mode together with the one or more UE to the target DeNB; and
performing by the source DeNB, the handover of the the relay device in the group handover mode together with the one or more UE from the source DeNB to the target DeNB;

wherein the source DeNB in response to receiving the first preconfigured parameter carried in the measurement report, the source DeNB performing the following:
sending a handover request message carrying the first pre-configured parameter to the target DeNB,
sending a handover command preparation message to the relay device,
receiving a handover request acknowledge message from the target DeNB, sending a handover command activation message to the relay device; and
wherein the relay device in response to receiving the handover command activation message from the source DeNB, the relay device performing the following:
configuring the relay device to operate using the first pre-configured parameter prior to the relay device is handover by the source DeNB to the target DeNB.

2. The relay device for a group handover together with one or more user equipment (UE) processing method according to claim 1 , wherein after receiving the first pre-configured parameter, the method further comprises:
sending by the relay device, pre-configuration information to the one or more UE which are in communication to and in control by the relay device, wherein the pre-configuration information facilitates the hand over of the one or more UE from the source DeNB to the target DeNB.

3. The relay device for a group handover together with one or more user equipment (UE) processing method according to claim 1 , wherein the auxiliary information pertaining to the relay device comprises:
at least one of: current location information, current speed information, current time point information, current frequency information, physical cell identity (PCI) information, and history record information.

4. The relay device for a group handover together with one or more user equipment (UE) processing method according to claim 3 , wherein prior to the relay device sending the auxiliary information to obtain the first pre-configured parameter, the method further comprises:
determining by the relay device, whether any of the following conditions are met by the relay device:
a distance from the target Donor E-UTRAN Node B is shorter than a preset distance,
a preset time point is reached, and
a preset location is reached.

5. The relay device for a group handover together with one or more user equipment (UE) processing method according to claim 1 , wherein the directly sending the auxiliary information pertaining to the relay device to the OMS to obtain the first pre-configured parameter, comprises:
directly sending by the relay device, the handover pre-configuration request carrying the auxiliary information pertaining to the relay device to the OMS of the relay device;
wherein the receiving by the relay device, the obtained first pre-configured parameter, comprises:
receiving by the relay device, the first pre-configured parameter sent by the OMS, wherein the first pre-configured parameter is obtained from a configured parameter set according to the auxiliary information pertaining to the relay device;

wherein the sending of the measurement report of the relay device to initiate the handover of the relay device from the source DeNB to the target DeNB, comprises:
sending by the relay device, the measurement report carrying the first pre-configured parameter to the source DeNB.

6. A relay device for a group handover together with one or more user equipment (UE) processing method, comprising:
pre-configuring a relay device in order that the relay device is handed over in a group handover mode together with one or more user equipment (UE) from a source donor E-UTran Node B (source DeNB) to a target Donor E-UTRAN Node B (target DeNB),
wherein prior to the source DeNB making a handover decision to handover the relay device in a group handover mode together with one or more user equipment (UE) to the target DeNB, the relay device is already in communication to and is in control of the one or more user equipment (UE),
wherein the pre-configuring of the relay device for the group handover processing method, comprising the relay device performing:
directly sending by the relay device, a measurement report or dedicated signaling message carrying the auxiliary information pertaining to the relay device for performing the group handover mode to the source DeNB in order to obtain a pre-configured parameter, wherein the pre-configured parameter comprise at least one of: target cell frequency information, target cell bandwidth information, physical cell identity (PCI) information of a target cell, multicast broadcast single frequency network (MBSFN) subframe configuration information of the target cell, a tracking area identifier (TAI), and public land mobile network (PLMN) identifier information;
receiving by the relay device, a handover command preparation message carrying the pre-configured parameter that is sent by the source DeNB, wherein the pre-configured parameter is obtained by the source DeNB directly from a configured parameter set of an operation and maintenance system of the source DeNB according to the auxiliary information priorly received by the source DeNB;

wherein after the source DeNB making the handover decision, the performing by the source DeNB the handover of the relay device in the group handover mode together with the one or more UE from the source DeNB to the target DeNB according to the pre-configured parameter, comprises:
receiving by the relay device, a handover command activation message sent by the source

Assignees

• Chai Li
• Huawei Tech Co Ltd

Inventors

• Chai Li

Classifications

• H04W36/0083 Primary

  Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists · CPC title

• H04W36/0055

  Transmission or use of information for re-establishing the radio link · CPC title

• H04W36/0016

  Hand-off preparation specially adapted for end-to-end data sessions · CPC title

• H04W36/0064

  of control information between different access points · CPC title

• H04W36/00837

  Determination of triggering parameters for hand-off · CPC title