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Method, base station and terminal for sending preamble sequence on random access channel

A random access channel and preamble technology, which is applied in the field of base stations and terminals, can solve problems such as time-consuming, reduce the number of channel access attempts, improve the success rate of channel access, and reduce random access delays Effect

Active Publication Date: 2020-11-10
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, there are often differences in the uplink and downlink path losses. There is often a large difference between the preamble transmission power calculated according to the existing method and the actual required preamble transmission power. As a result, the terminal needs to try random channel access many times. takes more time

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  • Method, base station and terminal for sending preamble sequence on random access channel
  • Method, base station and terminal for sending preamble sequence on random access channel
  • Method, base station and terminal for sending preamble sequence on random access channel

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Embodiment Construction

[0036] First, the communication system of the present application is introduced. The communication system can be Long Term Evolution (Long Term Evolution, LTE), an upgrade of Long Term Evolution (LTE-Advanced, LTE-A), Universal Mobile Telecommunications System (Universal Mobile Telecommunications System, UMTS), Global Mobile Communication system (Global System for Mobile Communications, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), etc.

[0037] The method for sending a preamble on a random access channel provided in this application is mainly applied to the interaction process between a base station and a terminal. In wireless communication, an uplink refers to a communication link from a terminal to a base station, and a downlink refers to a communication link from a base station to a terminal. The loss caused by signal propagation in space is called path loss...

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Abstract

The invention discloses a method for sending a leader sequence on a random access channel. The method comprises the steps as follows: the base station acquires leader initial receiving power and a first uplink and downlink loss difference, determines first leader receiving power according to the leader initial receiving power and the first uplink and downlink loss difference, and sends a message including the first leader receiving power to the terminal. The invention also provides a base station and a terminal which can implement the method. According to the method, the base station and the terminal provided by the invention, random access delay can be shortened, and a random access speed can be increased.

Description

technical field [0001] The present application relates to the field of wireless communication, and in particular to a method for sending a preamble on a random access channel, a base station and a terminal. Background technique [0002] Random access is a necessary process for network devices and terminals to establish wireless links. Only after the random access is completed, the network device and the terminal can perform data transmission. In the random access process, the terminal needs to configure the preamble transmission power, and then use the preamble transmission power to send the preamble sequence to the base station. [0003] The existing method for configuring the preamble transmission power is roughly as follows: the base station sends a message carrying the initial reception target power of the preamble to the terminal, and after the terminal obtains the initial reception target power of the preamble, calculates the preamble transmission power according to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W72/04H04L5/00
CPCH04L5/0048H04W72/0473H04W74/0833
Inventor 杨召青
Owner SHANGHAI HUAWEI TECH CO LTD