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Lead code sending method and device, and computer readable storage medium

A technology of a sending method and a sending device, applied in the field of communication, capable of solving problems affecting UE selection, reducing chances of successful access, and inability to initiate access, etc.

Active Publication Date: 2021-06-08
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the 5G New Radio (NR, NR for short, also called New Radio) environment, the strongest SSB index may also change due to network signal fluctuations at all times, which will affect the selection of the UE's final RO position.
[0004] When the time slot (slot) of the finally selected RO position does not have enough uplink symbols (symbols) to send the preamble, it will cause the UE to always be unable to initiate access due to lack of uplink resources, seriously reducing the chance of successful access

Method used

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  • Lead code sending method and device, and computer readable storage medium
  • Lead code sending method and device, and computer readable storage medium

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Embodiment Construction

[0022] As mentioned in the background art, currently the RO position actually used for preamble transmission will change with the finally selected SSB index, and the uplink and downlink time slot configuration of NR is very flexible. When the physical random access channel (Physical Random Access Channel, PRACH) time slot corresponding to the RO position corresponding to the changed SSB index does not have enough uplink symbols, for example, the selected RO position is exactly at 2 milliseconds (ms) data If there is a special time slot in the Data Distribution Service (DDS for short) configuration, the UE will always be unable to send the preamble and eventually trigger an access timeout alarm.

[0023] Specifically, when the UE in the prior art sends a preamble for initiating random access, it will first determine all RO positions (that is, candidate RO positions) that can be used to send the preamble according to network configuration parameters, including time domain positio...

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Abstract

The invention discloses a lead code sending method and device, and a computer readable storage medium. The method comprises the steps: selecting an optimal SSB according to the channel quality, and determining an optimal RO position corresponding to the optimal SSB according to a preset mapping relation between the SSB and a candidate RO position; judging whether a PRACH time slot where the preferred RO position is located contains enough uplink symbols or not; if a judgment result shows that the uplink symbols contained in the PRACH time slot are insufficient, selecting a replacement RO position according to channel quality in other PRACH time slots, the other PRACH time slots containing the candidate RO position and containing enough uplink symbols; transmitting a preamble at the alternative RO location. Through the scheme of the invention, the success access opportunity can be increased when the random access process is carried out.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a preamble sending method and device, and a computer-readable storage medium. Background technique [0002] According to relevant provisions of existing protocols, when a user equipment (User Equipment, referred to as UE) initiates random access in the fifth-generation mobile communication technology (The Fifth–Generation mobile communications, referred to as 5G) mode, it sends a random access preamble (preamble ) locations of all random access occasions (Random Access Occasion, RO for short) that can be used are configured by the network through system messages. However, which RO positions can be used to send the preamble in the end depends on the determination of the current strongest Synchronization Signal / Physical Broadcast ChannelBlock (SS / PBCH BLOCK, that is, SSB) index (SSB index for short) and network configuration. Mapping relationship between SSB a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04W74/00H04W74/08H04L5/00H04W72/54
CPCH04W72/0446H04W74/0833H04W74/002H04L5/0048H04W72/542Y02D30/70
Inventor 胡炜
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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