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Random access feedback method, system and user terminal based on competition

A user terminal and random access technology, applied in the field of communication, can solve problems such as interruption of eNB data transmission, failure to transmit HARQ feedback messages, etc., and achieve the effect of improving performance

Active Publication Date: 2012-05-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a contention-based random access feedback method, system, and user terminal to solve the problem in the prior art that when the transmission of the HARQ feedback message conflicts with the measurement time slot, the HARQ feedback message cannot be transmitted, resulting in eNB data Problem with transmission interruption

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  • Random access feedback method, system and user terminal based on competition
  • Random access feedback method, system and user terminal based on competition
  • Random access feedback method, system and user terminal based on competition

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Embodiment Construction

[0046] The core of the present invention is to provide a contention-based random access feedback method. The UE generates a feedback message according to the received Msg4. When the sending time of the feedback message conflicts with the measurement time slot, the UE cancels the measurement time slot and sends the feedback message.

[0047] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] The feedback method of the present invention is applied in the random access process where the UE competes. The reasons for the random access include: the UE initially accesses the network (accessed from the RRC_IDLE state), or the UE is in a radio link connection failure state...

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Abstract

The invention discloses a random access feedback method, a system and a user terminal based on competition. The method comprises the following steps: generating a feedback message by UE according to a received competition solving content message Msg4; and canceling the measuring time interval and sending the feed message by the UE when the sending time of the feedback message and the measuring time interval have the conflict. When the invention is used for random access feedback, the feedback massage is preferentially sent when the sending of the feedback message and the measuring time interval have the conflict, so eNB can receive the feedback message under any condition, the subsequent data transmission can be carried out, and the system communication performance is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a contention-based random access feedback method, system and user terminal. Background technique [0002] In the current LTE (Long Term Evolution, Long Term Evolution) random access scheme, the UE (User Terminal) random access process is initiated by a higher layer or a MAC (Media Access Control, Medium Access Control) layer. When the UE is out of synchronization in uplink, the random access process is called asynchronous random access process. A common method in the asynchronous random access process is contention-based random access. The process is as follows: UE passes RACH (Random Access Channel, Random access channel) sends Msg1 (Random Access Preamble, random access sequence message) to eNB (base station), and eNB feeds back Msg2 (Random Access Response, random access response message), and then UE sends Msg3 (Scheduled Transmission, first scheduling message...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
Inventor 李国庆谌丽高卓
Owner DATANG MOBILE COMM EQUIP CO LTD