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Transmission method and device in random access process

A technology of a random access process and a transmission method, applied in the field of transmission methods and devices in a random access process, can solve the problem of no clear processing scheme for msgA retransmission operations, and achieve the effect of improving scheduling efficiency

Active Publication Date: 2020-08-25
HUAWEI TECH CO LTD
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  • Application Information

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Problems solved by technology

[0005]However, in the 2-step RACH scheme, when the network side demodulates msgA, if the uplink data is demodulated incorrectly, the network side sends msgB to the terminal After that, there is no clear solution to the retransmission of msgA on the terminal and network side

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  • Transmission method and device in random access process
  • Transmission method and device in random access process
  • Transmission method and device in random access process

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application , but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0061] figure 1 Flowchart for the 4-step RACH process, such as figure 1 As shown, in the 4-step RACH process, the terminal sends msg1 (preamble) to the network side device. The network side device sends msg2 to the terminal in response to msg1, which is generally called RAR, and the RAR may include TA, TC-RNTI, UL grant and preamble index. The terminal sends msg3 according to the UL grant in the RAR. The msg3 includes ...

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Abstract

The invention provides a transmission method and device in a random access process. The transmission method in the random access process comprises the steps: transmitting a random access message to network side equipment, wherein the random access message comprises a preamble and uplink data; receiving a feedback message sent by the network side equipment in response to the random access message,wherein the feedback message comprises uplink scheduling authorization; determining a transmission mode of the uplink data according to the uplink scheduling authorization, wherein the transmission mode comprises new transmission or retransmission; and sending part or all of the uplink data according to the transmission mode. According to the invention, the self-adaptive scheduling between the newtransmission and retransmission of the PUSCH is realized based on the least indication information, and the scheduling efficiency is improved.

Description

[0001] This application claims the priority of a Chinese patent application with application number 201910118188.2 and application title "Transmission method and device during random access" filed with the China Patent Office on February 15, 2019, the entire contents of which are incorporated by reference In this application. technical field [0002] The present application relates to communication technologies, and in particular to a transmission method and device in a random access process. Background technique [0003] In traditional mobile broadband (MBB) service scenarios, wireless transmission services do not have high requirements for transmission delay, the MBB service packets transmitted each time are relatively large, and the overhead ratio of the control channel accompanying data channel transmission is relatively low , so when the terminal initiates random access, a four-step random access (4-Step random access channel, 4-Step RACH) procedure is generally adopted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W74/08H04L1/16
CPCH04W74/0833H04L1/1607H04W72/21
Inventor 行双双龚政委吴艺群
Owner HUAWEI TECH CO LTD
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