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Random access method and device

A technology of random access and random access preamble, applied in transmission path sub-channel allocation, digital transmission system, signaling allocation, etc., can solve the problem of low transmission efficiency, large differences in content and size, and large differences in MsgA content. problem, to achieve the effect of reducing complexity and power consumption

Active Publication Date: 2020-08-25
HUAWEI TECH CO LTD
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Problems solved by technology

However, due to the many application scenarios of 2-stepRACH, the content of MsgA sent by different terminals is quite different, and the content and size of the corresponding response message to be sent by the network side are quite different. less efficient

Method used

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Embodiment Construction

[0106] The technical solution in this application will be described below with reference to the accompanying drawings.

[0107] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: global system for mobile communications (GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long termevolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunication system (universal mobile telecommunication system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, future fifth generation (5th generation, 5G) system or new Wireless (new ra...

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Abstract

The invention provides a random access method and device, which can schedule response messages based on multiple PDCCHs and improve the transmission efficiency of the response messages. The random access method comprises the steps: the terminal equipment receives a first control channel resource set used for monitoring a public physical downlink control channel (PDCCH) and a second control channelresource set used for monitoring a specific PDCCH, wherein the first control channel resource set and the second control channel resource set are sent by network equipment; the terminal device sendsa first message to the network device; the terminal device receives at least one of a common PDCCH and a specific PDCCH by monitoring a first search space corresponding to the first control channel resource set and a second search space corresponding to the second control channel resource set, and is used for scheduling a PDSCH carrying a response message of the first message.

Description

technical field [0001] The present application relates to the communication field, and more specifically, to a random access method and device in the communication field. Background technique [0002] With the rapid development of ultra reliable low latency (URLLC) and machine type communication (MTC) and the Internet of things (IoT) in the future, sparse, small-packet and low-latency data Transmission also has more and more application scenarios. In order to satisfy this type of data transmission, a two-step (2-step) random access channel (random access channel, RACH) scheme is proposed. [0003] The main idea of ​​the 2-step RACH scheme is to combine the process of the first step and the third step in the traditional four-step (4-step) RACH into one step, and combine the steps of the second step and the fourth step in the traditional 4-step RACH The process is merged into one step, so that the 2-stepRACH scheme greatly accelerates the process of random access. A 2-step ...

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Application Information

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IPC IPC(8): H04W74/08H04L5/00H04W72/12
CPCH04W74/0833H04L5/0053H04W72/23H04W72/1273
Inventor 龚政委吴艺群陈雁
Owner HUAWEI TECH CO LTD
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