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A random access method and device

A technology of physical random access and random access response, which is applied in the field of communication, and can solve the problems that UE cannot access correctly, cannot access correctly, cannot completely detect preamble, etc.

Active Publication Date: 2019-06-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For a UE with a poor coverage level, multiple consecutive PRACH resources need to be used to send the same preamble (preamble). At this time, the following problem will arise: due to the poor coverage level of the UE, the base station may repeatedly transmit the preamble signal. It may not be possible to fully detect all preambles, which will cause the base station to be unable to accurately determine the start and end positions of the PRACH resources that the UE repeatedly sends preambles, thus making it impossible to access correctly; For the same PRACH resource, the RAR (Random Access Response, Random Access Response) repeatedly sent by the base station at this time conflicts with the RAR requested by the normal UE, causing the normal UE to fail to access correctly

Method used

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  • A random access method and device
  • A random access method and device
  • A random access method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0130] Embodiments of the present invention provide a terminal device, such as figure 1 shown, including:

[0131] The first obtaining unit 01 is configured to obtain at least one set of stored physical random access channel PRACH configuration information, the at least one set of PRACH configuration information is carried in the system information sent by the base station;

[0132] The processing unit 02 is configured to parse the at least one set of PRACH configuration information to obtain corresponding initial PRACH resources;

[0133] The first sending unit 03 is configured to start sending a preamble to the base station from the initial PRACH resource, so that the base station establishes a connection with the terminal device according to the preamble.

[0134]Further, the system message at least includes the at least one set of PRACH configuration information, wherein the content of the PRACH configuration information includes a preset cycle time and / or a preset start ...

Embodiment 2

[0149] Embodiments of the present invention provide a base station, such as image 3 shown, including:

[0150] The configuration unit 11 is configured to pre-configure physical random access channel PRACH resources, and generate at least one set of PRACH configuration information and send it to the terminal device, so that the terminal device obtains the at least one set of PRACH configuration information; and the The terminal device matches the corresponding initial PRACH resource according to the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and / or a preset start position;

[0151] The second acquisition unit 12 is configured to receive the preamble from the terminal device, and scramble the downlink resource information corresponding to the initial PRACH resource according to the designated random access radio network temporary identifier RA-RNTI calculation formula;

[0152] The ...

Embodiment 3

[0159] attached Figure 4 Shown is a hardware schematic diagram of the terminal device of the present invention:

[0160] The terminal device can be a mobile phone, a PC, an electric meter, a water meter, etc., and this embodiment uses a mobile phone terminal as an example to illustrate:

[0161] Such as Figure 4 The mobile phone terminal shown includes a receiver 101 , a processor 102 and a transmitter 103 .

[0162] Wherein, the processor 101 of the mobile terminal is the control center of the mobile terminal, and executes various functions and processes data of the mobile terminal by running or executing software programs and / or modules stored in memory.

[0163] The transceiver modules 101 and 103 can be used for sending and receiving information or receiving and sending signals during a call. In particular, for a mobile phone terminal, after receiving the downlink information of the base station, the processor 102 processes it; in addition, the designed uplink data is ...

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Abstract

Embodiments of the present invention provide a method and device for random access, which relate to the field of communication, by acquiring PRACH configuration information of a base station and sending a preamble on the corresponding initial PRACH resource, so that the base station identifies an access request of a terminal device requiring coverage enhancement At the same time, it does not affect the access of other terminal devices. The solution includes: acquiring at least one set of stored physical random access channel PRACH configuration information, the at least one set of PRACH configuration information is carried in the system information sent by the base station; parsing the at least one set of PRACH configuration information, Obtain a corresponding initial PRACH resource; start sending a preamble to the base station from the initial PRACH resource, so that the base station establishes a connection with the terminal device according to the preamble.

Description

technical field [0001] The present invention relates to the communication field, in particular to a random access method and device. Background technique [0002] With the development of science and technology, the data interaction between the base station and the user equipment is more and more frequent, and the quality requirements of the data interaction are also greatly improved. Quality requirements are getting higher and higher. [0003] However, some UEs (user equipment terminal equipment) may be in poor coverage areas compared with ordinary UEs, such as terminals for machine-type communication such as electric meters and water meters placed in buildings, basements or iron boxes, and the signals in these places are not very good. Well, there may be an additional maximum 20dB of signal loss. In order to make up for the above-mentioned signal loss, the signal is usually enhanced by means of repeated transmission (that is, spectrum spreading). [0004] Specifically, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W4/40H04W4/90
CPCH04W74/006H04W74/0833H04W4/90H04W4/40H04W72/23
Inventor 胡振兴权威杨晓东李秉肇张戬
Owner HUAWEI TECH CO LTD
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