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Wireless base station and handover method thereof

A technology of wireless base station and target base station, applied in the field of wireless base station and its handover, can solve the problems of inconsistent PDCPSN length and data service problems.

Inactive Publication Date: 2020-05-05
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, after the UE performs handover to the target base station, the PDCP SN length of the target base station and the UE will be inconsistent, and there may be problems with the data service of the UE.

Method used

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  • Wireless base station and handover method thereof
  • Wireless base station and handover method thereof
  • Wireless base station and handover method thereof

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Embodiment Construction

[0025] The technical terms in this specification refer to the customary terms in this technical field. If some terms are explained or defined in this specification, the explanations or definitions of these terms shall prevail. Each embodiment of the present disclosure has one or more technical features respectively. On the premise of possible implementation, those skilled in the art may selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.

[0026] now please refer to figure 1 , showing a flowchart of a handover method according to an embodiment of the present invention. figure 1 It can be applied to a wireless communication system, including: a source base station 110 , a UE 120 and a target base station 130 . The UE 120, the source base station 110 and the target base station 130 can exchange messages with each other. The PDCP SN length of UE 120 is greater than 12 ...

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Abstract

The invention discloses a wireless base station and a handover method thereof. The handover method includes: sending by the wireless base station to a UE a first reconfiguration message which includesa PDCP reconfiguration message to change a PDCP SN length of the UE to a predetermined bit length; after sending the first reconfiguration message, sending by the wireless base station a handover request message or a handover required message to inform the target base station and receiving a handover request acknowledge message or a handover command message; and after receiving the handover request acknowledge message or the handover command message, sending by the wireless base station a second reconfiguration message to the UE, wherein the second reconfiguration message includes a handovermessage.

Description

technical field [0001] The invention relates to a wireless base station and its handover method. Background technique [0002] In the wireless communication system, the length of the sequence number (SN, serial number) of the Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol) changes accordingly due to the launch of different versions. For example, for 3GPP version R8 (release 8), the length of PDCP SN is 12 bits; for 3GPP version R11, the length of PDCP SN is 15 bits; for 3GPP version R13, the length of PDCP SN is 18 bits. [0003] How to do a handover (handover) operation of a user equipment (UE) is important. In the handover process, usually the target base station will not change the PDCP SN length of the user equipment. [0004] At present, if the length of the PDCP SN of the target base station is inconsistent with the length of the PDCP SN of the UE, there may be problems with the data service provided to the UE after the handover. For exampl...

Claims

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Application Information

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IPC IPC(8): H04W4/50H04W88/08H04W76/30H04W76/27H04W76/19H04L5/00
CPCH04W4/50H04W88/08H04W76/27H04W76/30H04W76/19H04L5/0053H04W36/0072H04W36/02H04W36/0066H04W36/14H04W80/08H04W8/26
Inventor 叶昌国
Owner IND TECH RES INST
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