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Random access method, device and system

A technology of random access and corresponding relationship, applied in the field of communication, can solve the problem of large feedback overhead

Active Publication Date: 2017-02-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0027] Embodiments of the present invention provide a random access method, device, and system, which are used to solve the problem that in a coverage enhancement scenario, if an independent UL grant is used for ACK / NACK feedback for Msg3 of each terminal, the feedback overhead will be relatively high. big problem

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  • Random access method, device and system

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Embodiment Construction

[0162] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings of the specification. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, but not to limit the present invention.

[0163] An embodiment of the present invention provides a random access method on the terminal side, such as figure 2 As shown, the method includes the following processes:

[0164] S21. The terminal determines the RNTI dedicated for ACK / NACK feedback corresponding to the RA-RNTI of the terminal according to the correspondence between the RA-RNTI and the RNTI dedicated for ACK / NACK feedback;

[0165] S22. The terminal uses the determined RNTI dedicated for ACK / NACK feedback to detect the downlink control channel to obtain a downlink message used to carry the ACK / NACK feedback corresponding to Msg3;

[0166] S23. The terminal obtains the Msg3 ACK / NACK feedback of the t...

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Abstract

The invention discloses a random access method, device and system for solving a large feedback overhead if the msg3 of each terminal performs ACK / NACK feedback by using an independent UL grant in a coverage enhancement scene. The method comprises the following steps: the terminal determines the RNTI dedicated to the ACK / NACK feedback and corresponding to the RA-RNTI of the terminal according to a correspondence relationship between the RA-RNTI and the RNTI dedicated to the ACK / NACK feedback; using the RNTI dedicated to the ACK / NACK feedback to detect a downlink control channel to obtain a downlink message for carrying the ACK / NACK feedback corresponding to Msg3; and acquiring the ACK / NACK feedback of the Msg3 of the terminal from the downstream message according to the location of the ACK / NACK feedback of the Msg3 of the terminal in the downlink message, thereby saving system resources.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a random access method, equipment and system in a coverage enhancement scenario. Background technique [0002] Competitive random access refers to a random access process in which a base station (eNodeB, eNB) does not allocate dedicated resources for a terminal (User Terminal, also known as User Equipment, UE), and is completely initiated by the terminal randomly. Competitive random access is applicable to all five scenarios. For the scenarios of radio resource control (Radio Resource Control, RRC) connection establishment, RRC connection reestablishment and uplink data arrival, random access is completely initiated by the terminal, and the eNB does not have any prior information. ; For handover and downlink data arrival scenarios, the terminal initiates random access according to the instructions of the eNB. Generally speaking, the eNB will preferentially select no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04L5/00
Inventor 高雪娟邢艳萍
Owner DATANG MOBILE COMM EQUIP CO LTD
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