Preamble sequence cyclic shift amount determination method as well as set configuration method and device thereof

A technology of cyclic shift and preamble sequence, applied in pilot signal allocation, transmission path sub-channel allocation, digital transmission system and other directions, can solve problems such as inability to meet the requirements of 5G wireless communication systems

Active Publication Date: 2018-11-13
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As mentioned above, the cyclic shifts of the unrestricted set and the restric...

Method used

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  • Preamble sequence cyclic shift amount determination method as well as set configuration method and device thereof
  • Preamble sequence cyclic shift amount determination method as well as set configuration method and device thereof
  • Preamble sequence cyclic shift amount determination method as well as set configuration method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] When there is no frequency offset or the degree of frequency offset is negligible, the duration of the random access preamble is T SEQ , using length N ZCThe cyclic shift sequence of the ZC sequence is used as the preamble sequence, and the maximum delay extension of the uplink asynchronous user is τ DS , the guard samples on the random access channel receiver to prevent one place of pulse-shaping filter envelope is n g .

[0136] Under this condition, when the cell coverage radius requirement is r, the preamble sequence cyclic shift amount N CS The lower bound of

[0137]

[0138] where c is the speed of light.

[0139] Based on the above conditions, the preamble sequence cyclic shift amount set configuration method specifically includes:

[0140] Step A (initial setting): Determine the maximum supported preamble sequence cyclic shift amount N CS The number is P.

[0141] Step B: According to the actual requirement of cell coverage, select Q (Q≤P) cell covera...

specific Embodiment 1

[0146] Take length N ZC The cyclic shift sequence of the ZC sequence is used as the preamble sequence, the subcarrier spacing of the random access channel is Δf, and the duration of the random access preamble sequence is T SEQ , the maximum delay spread of uplink asynchronous users is τ DS , the guard samples on the random access channel receiver to prevent one place of pulse-shaping filter envelope is n g , the cell coverage radius requirement is r, and the preamble sequence cyclic shift amount is N CS .

[0147] The value of the above parameter is N ZC =839, Δf=2.5kHz, T SEQ = 400μs, τ DS = 2.6μs, n g Under the assumption of =2, a preferred preamble sequence cyclic shift amount set configuration method specifically includes:

[0148] Determine the supported preamble sequence cyclic shift amount N CS The maximum number is 16.

[0149] Select the following cell radius values ​​in advance, and calculate the preamble sequence cyclic shift amount N under each cell radius...

specific Embodiment 2

[0169] Take length N ZC The cyclic shift sequence of the ZC sequence is used as the preamble sequence, the subcarrier spacing of the random access channel is Δf, and the duration of the random access preamble sequence is T SEQ , the maximum delay spread of uplink asynchronous users is τ DS , the guard samples on the random access channel receiver to prevent one place of pulse-shaping filter envelope is n g , the cell coverage radius requirement is r, and the preamble sequence cyclic shift amount is N CS .

[0170] The value of the above parameter is N ZC =839, Δf=5kHz, T SEQ = 200μs, τ DS = 1.3μs, n g Under the assumption of =2, a preferred preamble sequence cyclic shift amount set configuration method specifically includes:

[0171] Determine the supported preamble sequence cyclic shift amount N CS The maximum number of is 16;

[0172] Select the following cell radius values ​​in advance, and calculate the preamble sequence cyclic shift amount N under each cell radiu...

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Abstract

The invention discloses a preamble sequence cyclic shift amount determination method as well as a set configuration method and device thereof. The preamble sequence cyclic shift amount determination method is applied to a user terminal, and the user terminal stores a preamble sequence cyclic shift amount set in advance. The method comprises the following steps: receiving a system information blocktransmitted by a base station, and acquiring a first index carried in the system information block; and selecting a preamble sequence cyclic shift amount N<CS> corresponding to the first index from the prestored preamble sequence cyclic shift amount set according to the first index. Through adoption of the preamble sequence cyclic shift amount determination method, the complex and diverse coverage requirements of a 5G wireless communication system are met; intra-cell interference and inter-cell interference are reduced; and users are provided with lower access delay and better access experience.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for determining a preamble sequence cyclic shift amount and a set configuration method and device thereof. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), it brings unprecedented challenges to future mobile communication technologies. For example, according to the ITU (International Telecommunication Union, International Telecommunication Union) report ITU-R M. It is estimated that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared with 2010 (4G era), and the number of user equipment connections will also exceed 17 billion , as a large number of IoT devices gradually penetrate into the mobile communication network, the number of connected devices will become even more asto...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W72/04H04W74/00H04W74/08
CPCH04L5/0048H04W72/0453H04W74/008H04W74/0833H04W72/23
Inventor 张英杰钱辰喻斌熊琦
Owner BEIJING SAMSUNG TELECOM R&D CENT
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