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Relay selection and reselection method, device and terminal

A terminal, the selected technology, applied in the direction of electrical components, wireless communication, etc., can solve the problem of increasing the delay of handover, and achieve the effect of reducing the delay of handover

Pending Publication Date: 2022-04-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method, device and terminal for relay selection and reselection, which are used to solve the problem that the source cell and the target cell to which the UE is connected belong to different cells during relay selection and reselection in the prior art, and the interactive Information such as UE context context and handover command will increase the delay of handover

Method used

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  • Relay selection and reselection method, device and terminal
  • Relay selection and reselection method, device and terminal
  • Relay selection and reselection method, device and terminal

Examples

Experimental program
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Embodiment 1

[0185] In this embodiment one, if Figure 6 As shown, adopting the method for relay selection and reselection described in the embodiment of the present invention includes:

[0186] S610, multiple relays respectively send relay discovery related messages to the terminal UE;

[0187] Optionally, the relay discovery related message is a direct communication interface discovery message or a direct communication interface communication message. According to the identification information carried in the direct communication interface discovery message or the direct communication interface communication message, determine whether the relay that sends the relay discovery related message belongs to the current serving cell of the terminal.

[0188] Wherein, the identification information includes one or more of the following information:

[0189] Public Land Mobile Network (PLMN) logo;

[0190] Community ID.

[0191] The identification information is carried in any of the followin...

Embodiment 2

[0210] In the second embodiment, if Figure 7 As shown, adopting the method for relay selection and reselection described in the embodiment of the present invention includes:

[0211] S710, the terminal UE receives relay discovery related messages sent by multiple relays;

[0212] Wherein, the type of the relay discovery related message and the manner of determining whether the relay belongs to the current serving cell of the UE according to the relay discovery related message are the same as those in the first embodiment, and will not be described here again.

[0213] S720. Determine a target relay selected or reselected by the UE according to the received relay discovery related message.

[0214] Specifically, according to Figure 7 and combine Figure 4 As shown, the process is also Figure 4 Steps S420 to S440 specifically include:

[0215] selecting a relay belonging to the current serving cell of the UE from all relay UEs discovered by the UE as a first set of candi...

Embodiment 3

[0225] In the third embodiment, if Figure 8 As shown, similar to Embodiment 1 and Embodiment 2, the UE discovers possible relays by receiving relay discovery related messages. Specifically, the type of relay discovery-related messages and the manner of determining whether the relay belongs to the UE's current serving cell according to the relay discovery-related messages are the same as those in Embodiment 1 and Embodiment 2, and will not be described here again.

[0226] which, combined with Figure 8 and Figure 5 , the third embodiment determines the target relay for selection or reselection according to the first threshold and the second threshold of channel quality, and the specific process includes:

[0227] S810, the terminal UE receives the relay discovery related message sent by the relay;

[0228] S820, the UE performs relay selection or reselection;

[0229] Wherein, when the current channel quality of the UE is lower than the first threshold, the UE performs r...

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Abstract

The invention provides a relay selection and reselection method, a relay selection and reselection device and a terminal. The method comprises the following steps: in a relay selection or reselection process, determining a selected or reselected target relay according to a preset selection condition; wherein the preset selection condition is that the relay belonging to the current service cell of the terminal is preferentially selected as the target relay. By adopting the method, the relay belonging to the current service cell of the terminal is preferentially selected as the selected or reselected target relay, so that when switching between direct and indirect or switching from indirect to indirect occurs, after relay selection or reselection is executed, a source cell to which UE (User Equipment) is connected and the target cell belong to the same cell; in this way, the process of information interaction such as interaction of UE contexts and switching commands does not need to be executed, so that the switching time delay is reduced.

Description

technical field [0001] The present invention relates to the field of wireless technology, in particular to a method, device and terminal for relay selection and reselection. Background technique [0002] A current solution for implementing network coverage expansion is to introduce a relay (Relay), where the relay Relay may be a terminal with a relay function. For the terminal UE-to-Network Relay, the interface between the relay and the network uses the Uu interface, and the interface with the relayed UE uses the direct communication interface. The link between the relay and the network may be called a backhaul link (Backhaul link, BH) for the UE. For UE-to-UE relay, two relayed UEs can perform data transmission through the relaying UE. [0003] The bearers in the relay scenario generally include the following three types: [0004] Direct communication interface bearer: that is, the bearer between UE and relay UE; [0005] End-to-end bearer between UE and network equipme...

Claims

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Application Information

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IPC IPC(8): H04W36/18H04W40/22
CPCH04W40/22
Inventor 赵亚利
Owner DATANG MOBILE COMM EQUIP CO LTD