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Secondary eNB (SeNB) changing method and device

A technology of secondary base station and primary base station, applied in the field of secondary base station change, can solve the problems of unsupported and ineffective triggering of SeNB data forwarding and release, etc.

Active Publication Date: 2018-02-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] Embodiments of the present invention provide a method and device for changing a secondary base station, so as to at least solve the problem that the related technology does not support the change of SeNB under dual connectivity (Dual Connectivity, referred to as DC), and cannot effectively trigger the data forwarding and release of the SeNB. The problem

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  • Secondary eNB (SeNB) changing method and device
  • Secondary eNB (SeNB) changing method and device

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specific Embodiment 1

[0127] Specific embodiment 1: The MeNB directly configures and maintains the connection with the S-SeNB.

[0128] Figure 10 It is a flowchart (1) of MeNB directly configuring and maintaining a connection with S-SeNB according to a specific embodiment of the present invention, such as Figure 10 As shown, the steps are described below:

[0129] Step 1: MeNB sends a request message to the target SeNB to allocate resources to the UE (such as Figure 10 in the SeNB AdditionRequest message).

[0130] Step 2: The target SeNB sends a feedback message to the MeNB to accept or reject the request (eg Figure 10 SeNBaddition Request Acknowledge message).

[0131] Step 3: The MeNB determines that it is necessary to keep the connection of the UE at the S-SeNB during the SeNB change process, and the MeNB sends an instruction message to the S-SeNB to perform reconfiguration from the S-SeNB (such as Figure 10 In the SeNB Reconfiguration message), the content of the indication informati...

specific Embodiment 2

[0163]Specific embodiment 2: MeNB instructs a target secondary base station (Target SeNB, T-SeNB for short) to configure and maintain a connection with a source secondary base station (Source SeNB, S-SeNB for short).

[0164] Figure 11 It is a flowchart (2) of MeNB directly configuring and maintaining a connection with S-SeNB according to a specific embodiment of the present invention, such as Figure 11 As shown, the steps are described below:

[0165] Step 1: MeNB sends a request message to the target SeNB to allocate resources to the UE (such as Figure 11 in the SeNB AdditionRequest message). At the same time, carry the following content on the X2 interface:

[0166] An indication of maintaining the connection with the source secondary base station (such as Figure 11 remainConnectionIndication in indication);

[0167] The timer configuration for maintaining the connection with the source secondary base station, including the timing duration of the timer (such as F...

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Abstract

The invention provides a secondary eNB (SeNB) changing method and device. The SeNB changing method comprises the following steps: informing a target SeNB, a source SeNB and user equipment (UE) that the UE keeps a connection with the source SeNB in an SeNB changing process; receiving an indication message from the target SeNB, wherein the indication message is used for indicating that the UE accesses the target SeNB successfully; and instructing the source SeNB to release the connection with the UE according to the indication message. Through adoption of the method and the device, the problem that data forwarding and releasing of the SeNB cannot be triggered effectively since change of the SeNB under DC (Dual Connectivity) is not supported in the prior art is solved, and the effects of keeping data communication and shortening data interrupt time in an SeNB changing process of the UE are achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for changing a secondary base station. Background technique [0002] The Dual Connectivity (DC) function is introduced into the Long Term Evolution (LTE for short) system, and the DC includes two cell groups: a Master Cell Group (MCG for short) and a secondary cell Secondary Cell Group (SCG for short). The MCG includes a primary cell (Primary Cell, referred to as PCell for short) or additionally includes one or more SCells, and the SCG includes a PSCell or additionally includes one or more secondary cells (Secondary Cell, referred to as SCell for short). The base station that manages MCG is called MeNB, and the base station that manages SCG is called SeNB. SCG bearer architecture (such as figure 1 shown): [0003] User equipment (User Equipment, UE for short) has independent bearers on the MeNB and SeNB, and the UE has an independent PDCP entity on each ...

Claims

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Application Information

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IPC IPC(8): H04W8/08H04W76/15H04W84/04
CPCH04W8/08H04W84/042
Inventor 吴昱民
Owner ZTE CORP
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