A processing method and device for re-establishment during inter-base station handover

A switching process and processing method technology, applied in connection management, wireless communication, electrical components, etc., can solve problems such as dropped calls, and achieve the effect of improving stability and user experience

Active Publication Date: 2021-02-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a method and device for processing re-establishment during cross-base station handover, so as to at least solve the problem in the related art that the target base station receives an RRC connection re-establishment request in the preparation stage of cross-base station handover, which causes re-establishment failure and causes UE call drop question

Method used

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  • A processing method and device for re-establishment during inter-base station handover
  • A processing method and device for re-establishment during inter-base station handover
  • A processing method and device for re-establishment during inter-base station handover

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Embodiment 1

[0094] The first optional embodiment of the present invention provides a handover processing method when an RRC connection re-establishment request is received during the handover process. Figure 8 It is a flow chart of a processing method for re-establishment in a cross-base station handover process according to an optional embodiment 1 of the present invention, as shown in Figure 8 As shown, the process includes the following steps:

[0095] In step S802, the base station on the handover target side receives an RRC connection re-establishment request message from the UE during the preparation phase.

[0096] In step S804, the target base station first suspends the handover preparation process, executes the RRC connection re-establishment process first, and sends an RRC connection re-establishment message.

[0097] Step S806, after the target base station receives the completion of RRC connection re-establishment, then the target base station sends an RRC conn...

Embodiment 2

[0107] The second optional embodiment of the present invention provides a handover processing method for receiving an RRC connection re-establishment request during the X2 handover preparation phase. Figure 9 It is a flow chart of a processing method for re-establishment in a cross-base station handover process according to optional embodiment 2 of the present invention, as shown in Figure 9 As shown, the process includes the following steps:

[0108] In step S902, the base station receives the measurement report message sent by the UE. The base station, as the handover source side, decides to perform X2 handover, and sends an X2 handover request message to the target side base station.

[0109] In step S904, after receiving the X2 handover request message from the handover source base station, the handover target base station executes a handover preparation process.

[0110] In step S906, due to reasons such as the radio environment, the UE starts to perform a...

Embodiment 3

[0117] The third optional embodiment of the present invention provides a handover processing method for receiving an RRC connection re-establishment request during the S1 handover preparation phase. Figure 10 It is a flow chart of a processing method for re-establishment in a cross-base station handover process according to optional embodiment 3 of the present invention, as shown in Figure 10 As shown, the process includes the following steps:

[0118] In step S1002, the base station receives the measurement report message sent by the UE, and the base station, as the handover source side, decides to perform S1 handover, and sends an S1 handover request message to the MME.

[0119] Step S1004, after receiving the S1 handover request message from the MME, the base station at the handover target side executes a handover preparation process.

[0120] In step S1006, due to reasons such as the radio environment, the UE has a radio link failure, starts an RRC connection ...

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Abstract

The invention provides a processing method and device for re-establishment in the process of cross-base station handover. Wherein, the method includes: when the target base station receives a radio resource control (RRC) connection re-establishment request of the user equipment (UE) in the handover preparation phase, the target base station suspends the handover preparation process and executes the RRC connection re-establishment process; when the target When the base station receives the UE's RRC connection re-establishment complete message, the target base station activates the handover preparation process, sends an RRC connection reconfiguration message to the UE, and sends a handover confirmation message carrying an extended cause value to the mobility management entity (MME) or the source base station. Through the present invention, the processing strategy of the target base station receiving the RRC connection re-establishment request in the cross-base station handover preparation stage is proposed, which reduces the occurrence rate of UE call drop caused by the RRC connection re-establishment failure in the handover preparation process, and improves the handover stability and user experience.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a processing method and device for re-establishment during handover between base stations. Background technique [0002] In a Long Term Evolution (LTE for short) system, the state of a user equipment (User Equipment, UE for short) is divided into two types: a connected state (RRC_CONNECTED) and an idle state (RRC_IDLE). When the UE in the RRC_CONNECTED state moves from the serving cell to another cell, a handover (HandOver) will be triggered to ensure uninterrupted service. When a UE is handed over from a cell of an evolved base station (Evolved Node B, eNB for short, ie, LTE base station) to another cell of an eNB, a handover across base stations will be triggered. If there is an X2 interface (X2Interface) between the handover source base station and the handover target base station and they are connected to the same Mobility Management Entity (MME for short), according to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W36/08H04W76/10H04W76/19
CPCH04W36/0005H04W36/0055H04W36/08H04W76/19H04W76/10
Inventor 邹俊赵毅杨敏陈洪昌
Owner ZTE CORP
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