A random access method, device and system

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

Active Publication Date: 2019-09-17
DATANG MOBILE COMM EQUIP CO LTD
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  • 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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  • A random access method, device and system
  • A random access method, device and system
  • A random access method, device and system

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Embodiment Construction

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

[0163] A random access method on the terminal side provided by an embodiment of the present invention, such as figure 2 As shown, the method includes the following steps:

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

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

[0166] S23. The terminal obtains the ACK / NACK feedback of the terminal's Msg3 fro...

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Abstract

Disclosed are a random access method, device, and system, used for solving the problem, in the context of coverage enhancement, of employing an independent UL grant on the Msg3 of each terminal to perform ACK / NACK feedback resulting in large feedback overhead. The method comprises: according to a correlation between an RA-RNTI and an RNTI used specifically for ACK / NACK, a terminal determining an RNTI, corresponding to the RA-RNTI of the terminal, used specifically for ACK / NACK feedback; using the RNTI used specifically for ACK / NACK feedback to detect a downlink control channel so as to obtain a downlink message used for carrying ACK / NACK feedback corresponding to the Msg3; according to the location, in the downlink message, of the ACK / NACK feedback corresponding to the Msg3 of the terminal, obtaining from the downlink message the ACK / NACK feedback of the Msg3 of said terminal, thereby conserving system resources.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a random access method, device and system in a coverage enhancement scenario. Background technique [0002] The contention 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 called user equipment, User Equipment, UE), and is completely randomly initiated by the terminal. Competitive random access is applicable to all five scenarios. For the scenarios of Radio Resource Control (RRC) connection establishment, RRC connection reestablishment, and uplink data arrival, random access is completely spontaneous by the terminal, and the eNB does not have any a priori Information; for handover and downlink data arrival scenarios, the terminal initiates random access according to eNB instructions. Generally speaking, eNB will give priority to non-competitive rando...

Claims

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Application Information

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Patent Type & Authority Patents(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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