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Communication method and device

A communication method and technology of communication equipment, applied in the field of communication

Inactive Publication Date: 2021-01-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a communication method and device to solve the problem of how to determine the TA of the terminal equipment during two-step random access to improve the reliability of uplink data transmission

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0066] Figure 5 It is a schematic diagram of a communication process provided by the embodiment of this application, and the process includes:

[0067] S501: The network device sends configuration information, and the terminal device receives the configuration information, where the configuration information includes a mapping relationship between downlink measurement values ​​and TAs.

[0068] Wherein, the downlink measurement value may be a measurement value of a downlink direction signal or channel between the terminal device and the network device.

[0069] As the distance between the terminal device and the network device increases, the quality of the downlink signal received by the terminal device from the network device shows a downward trend. For example, the power of the downlink signal and the signal-to-interference-noise ratio will decrease, and the path loss will increase. However, the increase in the distance between the terminal device and the network device wi...

Embodiment 2

[0097] In another possible communication process, the configuration information includes the mapping relationship between the downlink measurement value and TA, and also includes the mapping relationship between the downlink measurement value and the timing advance offset (TA_offset). For the communication process, see Image 6 .

[0098] S601: The network device sends configuration information, and the terminal device receives the configuration information, where the configuration information includes a mapping relationship between a downlink measurement value and TA and a mapping relationship between a downlink measurement value and TA_offset.

[0099] S602: The terminal device obtains a downlink measurement value with the network device.

[0100] S603: The terminal device determines a target TA and a target TA_offset according to the obtained downlink measurement value.

[0101] S604: The terminal device adjusts the target TA according to the target TA_offset.

[0102] S6...

Embodiment 3

[0113] In another possible communication process, the configuration information includes the mapping relationship between the downlink measurement value and TA, and also includes the mapping relationship between the number of random access request retransmissions and the timing advance increase step (TA_Rampingstep). For the communication process, see Figure 7 shown.

[0114] S701: The network device sends configuration information, and the terminal device receives the configuration information, where the configuration information includes a mapping relationship between downlink measurement values ​​and TAs and a mapping relationship between random access request retransmission times and TA_Rampingstep.

[0115] S702: The terminal device obtains a downlink measurement value with the network device, and obtains the number of retransmission times of the random access request.

[0116] S703: The terminal device determines the target TA according to the obtained downlink measurem...

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PUM

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Abstract

The invention relates to the technical field of communication, discloses a communication method and device, and is used for solving the problem of how to determine a timing advance TA by terminal equipment during two-step random access so as to improve the reliability of uplink data transmission. The method comprises the following steps: a terminal device receives configuration information, wherein the configuration information comprises a mapping relationship between a downlink measurement value and a TA; the terminal device obtains a downlink measurement value; and the terminal device determines a target TA according to the obtained downlink measurement value.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device. Background technique [0002] Random access (random access, RA) may also be called a random access channel (random access channel, RACH). In long term evolution (long term evolution, LTE), new radio (new radio, NR) and other systems, terminal equipment needs to enter from the radio resource control (radio resource control, RRC) idle state or inactive state through random access In the RRC connection state, various bearers can be established with network devices, and then communicate with network devices. At present, the random access of terminal equipment usually adopts four-step random access channel (4-step physical random access channel, 4-step RACH). The device sends a random access response (random access response, RAR) to the terminal device, the terminal device sends uplink data to the network d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W74/00H04W74/08H04W76/28
CPCH04W56/0055H04W74/006H04W74/0833H04W76/28H04W74/002H04W74/00H04W56/00H04W74/08H04W24/10
Inventor 何青春娄崇
Owner HUAWEI TECH CO LTD
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