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Communication method and device

A communication method and technology of timing information, applied in the field of communication, can solve the problems of decreasing the accuracy of channel estimation, misalignment of channel time, increasing multi-user interference, etc.

Active Publication Date: 2021-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The advantage of synchronous transmission is high reliability of communication, but there are two disadvantages: 1. Large transmission overhead
For network equipment, the channels of multiple users are not aligned in time, which will increase the interference between multiple users; 2) The uplink timing deviation will also cause the linear rotation of the phase of the user signal in the frequency domain (time domain delay, etc. effective in frequency domain phase rotation), leading to a decrease in the accuracy of channel estimation
Therefore, under the framework of OFDM, the existing transmission method will cause the reliability of transmission to decrease

Method used

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Embodiment Construction

[0061] Embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0062] figure 1 A schematic diagram of a communication system involved in the embodiment of the present application is given. The communication system may include at least one network device 100 (only one is shown) and one or more user devices 200 connected to the network device 100 .

[0063]The network device 100 may be a device capable of communicating with a user equipment (user equipment, UE) 200 . The network device 100 may be any device with a wireless transceiver function. Including but not limited to: base station NodeB, evolved base station eNodeB, base station in the fifth generation (the fifth generation, 5G) communication system, base station or network equipment in the future communication system, wireless-fidelity (wireless-fidelity, Wi-Fi ) Access nodes, wireless relay nodes, wireless backhaul nodes, etc. in the sy...

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Abstract

The application discloses a communication method and device. When the time interval between the current moment and the latest received uplink timing information is less than or equal to the first time interval, the user equipment uses the first set of transmission parameters to perform uplink data transmission; at the current moment and the last received uplink timing information When the time interval is greater than the first time interval, a second set of transmission parameters is used for uplink data transmission; wherein, the transmission parameters contained in the first set of transmission parameters and the second set of transmission parameters are different. Corresponding devices are also disclosed. By using different sets of transmission parameters for uplink data transmission at different time intervals according to the time interval between the current time and the last received uplink timing information, both transmission efficiency and transmission reliability can be considered.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a communication method and device. Background technique [0002] In a long term evolution (LTE) communication system, when the user equipment and the network equipment perform uplink communication, the user equipment is in a synchronized state, that is, when the user equipment maintains an uplink synchronization state with the network equipment, it can give the network equipment Send uplink business. A way for the user equipment to maintain uplink synchronization is to adjust the sending timing of the uplink signal by receiving a timing advance (timing advance, TA) command (command) from the network device. The network device can send TA commands to the user equipment in two ways: 1) The user equipment first sends a random access preamble (random access preamble) to the network device, and the network device then performs timing measurement according to the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0078H04L5/0048H04L5/0094H04L5/003H04W28/18H04W72/0446H04W72/1268H04W72/21H04W72/535
Inventor 王磊陈雁徐修强王轶
Owner HUAWEI TECH CO LTD