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Method, network device, and terminal for enhanced transmission of physical random access channel

A physical random access and terminal technology, applied in the field of communication, can solve problems such as UE power waste

Active Publication Date: 2019-11-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above PRACH enhanced transmission method, if the UE uses the power calculation method to determine the transmission power for each attempted transmission of the preamble, then there will be a problem of UE power waste

Method used

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  • Method, network device, and terminal for enhanced transmission of physical random access channel
  • Method, network device, and terminal for enhanced transmission of physical random access channel
  • Method, network device, and terminal for enhanced transmission of physical random access channel

Examples

Experimental program
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Effect test

Embodiment approach

[0311] method one:

[0312] The second characteristic parameter includes initial preamble reception target power, number of preamble transmission attempts, path loss, and power ramping step size. The transmission power of the PRACH enhanced transmission related to the level information of the PRACH enhanced transmission determined by the UE PPRACH=min{P CMAX，c(i), PREAMBLE_RECEIVED_TARGET_POWER+PL c}_[dBm], where min{} is the minimum value operation, P CMAX，c (i) is the maximum transmit power of the UE in the subframe numbered i, PL c The path loss is a value estimated by the UE. If the level information of the PRACH enhanced transmission determined by the UE is based on the level information of the PRACH enhanced transmission sent by the UE in the previous preamble, or the information of the 0th level of the PRACH transmission is added to the 1st level of the PRACH enhanced transmission Level information, the level information of the enhanced PRACH transmission after the ...

Embodiment 2

[0355] When the first characteristic parameter of PRACH enhanced transmission is transmission power, determine the first characteristic parameter of PRACH enhanced transmission, and the first characteristic parameter of PRACH enhanced transmission is related to the determined level information of PRACH enhanced transmission, including: if the UE The determined level information of the enhanced PRACH transmission is the nth level information of the enhanced PRACH transmission, and the transmission power of the enhanced PRACH transmission is the maximum value of the transmission power of the UE. Wherein, n is an integer greater than 0, for example, the value of n may be one or more of 1, 2, 3 (one, two, three), for example, n is 2 and 3.

[0356] In this embodiment, after the UE determines that the level information of the PRACH enhanced transmission is the nth level information of the PRACH enhanced transmission, the UE directly tries to send the preamble according to the maximu...

Embodiment 3

[0361] Since the sequence duration of different preamble formats may be different, for the level information of a PRACH enhanced transmission, the number of repeated preamble transmissions is related to the preamble format, so this embodiment determines the preamble format for the level information of the PRACH enhanced transmission.

[0362] When the first characteristic parameter of PRACH enhanced transmission is the preamble format, determine the first characteristic parameter of PRACH enhanced transmission, and the first characteristic parameter of PRACH enhanced transmission is related to the level information of the determined PRACH enhanced transmission including: all PRACH The preamble formats related to the level information of the enhanced transmission are the same, or there are at least two different preamble formats related to the level information of the enhanced PRACH transmission.

[0363] In a cell, all PRACH enhanced transmission level information uses the same...

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Abstract

A physical random access channel enhanced transmission method, network equipment, and terminal, taking the implementation of the terminal as an example, including: a level determination unit for determining the level information of the physical random access channel PRACH enhanced transmission; a parameter determination unit, Used to determine the first characteristic parameter of the PRACH enhanced transmission related to the level information of the PRACH enhanced transmission determined by the level determination unit; wherein the first characteristic parameter includes at least one of transmission power, preamble format, and time-frequency resources a sending unit, configured to perform enhanced sending of the PRACH according to the first characteristic parameter determined by the parameter determining unit. In the above device solution, the first characteristic parameter is related to the level information, and the characteristic parameter used for PRACH enhanced transmission can be quickly and accurately determined, thereby saving terminal power.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for enhanced transmission of a physical random access channel, network equipment, and a terminal. Background technique [0002] The resources of the LTE (Long Term Evolution, long-term evolution) or LTE-A (LTE Advanced, advanced long-term evolution) system are divided into radio frames (system frames) in time, and a radio frame contains 10 subframes, and a subframe is long 1ms, a subframe consists of two slots; divided into subcarriers in frequency. A PRB (Physical Resource Block, physical resource block) is defined as a time slot in time and 12 subcarriers in frequency. [0003] In a wireless communication system, a UE (User Equipment, user equipment / terminal) needs to establish a connection with a network, and this process is generally called a random access process. In the LTE or LTE-A system, random access procedures are divided into contention-based...

Claims

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Application Information

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IPC IPC(8): H04W74/08
CPCH04W74/08H04W52/50H04W74/002Y02D30/70H04W52/146H04W52/242H04W52/36H04W74/006H04W74/0833H04W52/362H04W74/004
Inventor 南方程型清余政
Owner HUAWEI TECH CO LTD
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