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WO2016011667A1 - Procédé et dispositif de transmission de préambule d'accès aléatoire - Google Patents

Procédé et dispositif de transmission de préambule d'accès aléatoire Download PDF

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Publication number
WO2016011667A1
WO2016011667A1 PCT/CN2014/083055 CN2014083055W WO2016011667A1 WO 2016011667 A1 WO2016011667 A1 WO 2016011667A1 CN 2014083055 W CN2014083055 W CN 2014083055W WO 2016011667 A1 WO2016011667 A1 WO 2016011667A1
Authority
WO
WIPO (PCT)
Prior art keywords
preamble
random access
format
configuration information
access preamble
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/083055
Other languages
English (en)
Chinese (zh)
Inventor
丁仁天
龚政委
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2014/083055 priority Critical patent/WO2016011667A1/fr
Priority to CN201480031489.7A priority patent/CN105474725B/zh
Publication of WO2016011667A1 publication Critical patent/WO2016011667A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the base station first establishes downlink synchronization with the user equipment before establishing a communication connection with the user equipment, so that the user equipment initiates random access to the base station, where the base station determines to receive according to the random access preamble sent by the user equipment. Power and time, then the base station sends a random access response to the user equipment, indicating the power and time of the next transmission of the user equipment, so as to establish uplink synchronization, and only the downlink synchronization and uplink synchronization are obtained, and the communication connection can be established between the user equipment and the base station.
  • the random access preamble in the prior art is composed of a preamble sequence and a cyclic prefix.
  • the length of the preamble sequence is 839, which is mapped to 839 subcarriers, the subcarrier spacing is 1.25 3 ⁇ 4, and there are 12/13 subcarriers on each side.
  • the guard band of the carrier width occupies a total of 864 subcarrier frequency bandwidths.
  • the frequency bandwidth occupied by the preamble sequence of the random access preamble is 1.25 KHz" S64 ⁇ 1 .0 SMHz. Therefore, the spectrum resource used for transmitting the random access preamble is at least 6 physical resource blocks, one physical resource.
  • the frequency bandwidth of the block is 1 80.
  • the above random access preamble can achieve good random access effect.
  • the M2M terminal transmits the random access preamble due to the occlusion and transmission distance of the obstruction.
  • the transmission loss and the signal attenuation are increased.
  • the coverage capability of the existing random access preamble is insufficient to enable the M2M terminal to complete random access, and the coverage refers to the range of distances that the random access preamble can be transmitted.
  • it is necessary to consider the coverage enhancement of random access Repeated random access preambles may be considered in the prior art, but such repetition may result in excessive resource overhead. For example, to achieve a 20 dB coverage enhancement, it may be necessary to repeat 200 random access preambles, which is almost unacceptable in implementation. Summary of the invention
  • the embodiments of the present invention provide a method and a device for transmitting a random access preamble to solve the problem that the resource overhead is too high when considering the coverage enhancement of random access in the prior art.
  • a processing unit configured to generate a random access preamble according to the preamble configuration information received by the receiving unit
  • a sending unit configured to transmit the random access preamble by using the resource
  • the frequency bandwidth of the resource used for transmitting the random access preamble is N ⁇ H physical resource blocks, and the N ⁇ OT physical resource blocks include ⁇ 3 ⁇ 4 ⁇ subcarriers, ⁇ ⁇ ,
  • the parameter used by the preamble configuration information to generate a random access preamble includes a set of preamble format indexes, where the set of preamble format indexes corresponds to a set of preamble formats,
  • the set of preamble format indexes includes at least two preamble format indexes, and each preamble format index corresponds to one preamble format, and each preamble format indicates a time domain duration T SEQ of the preamble sequence in the random access preamble, And the time domain duration T CP of the cyclic prefix;
  • the processing unit is further configured to:
  • the processing unit generates a random access preamble according to the preamble configuration information received by the receiving unit, and includes:
  • the parameter used by the preamble configuration information to generate a random access preamble includes a set of preamble format indexes, where the set of preamble format indexes corresponds to a set of preamble formats,
  • the set of preamble format indexes includes at least two preamble format indexes, and each preamble format index corresponds to one preamble format, and each preamble format indicates a time domain duration T SEQ of the preamble sequence in the random access preamble, And the time domain duration T CP of the cyclic prefix;
  • N RACH is an integer, ⁇ ⁇ is between the subcarriers of the random access preamble
  • the random access preamble includes a preamble sequence and a cyclic prefix.
  • the preamble sequence may be a "Zadoff-Chu" (ZC for short) sequence.
  • the ZC sequence is a non-binary unit amplitude sequence that satisfies the CAZAC (Constant Amplitude Zero Autocorrelation) feature.
  • CAZAC Constant Amplitude Zero Autocorrelation
  • the advantage of the C AZAC feature is that a cyclic shift (referred to as CS) of the same ZC sequence can produce multiple orthogonal sequences.
  • the N CH physical resource blocks include N H subcarriers.
  • the physical resource block index may be used to indicate a resource offset
  • the user equipment determines, according to the resource offset, a resource number of a physical resource block used for transmitting a random access preamble. For example, if the initial physical resource block number is 0 and the resource offset is 90, the starting physical resource block used to transmit the random access preamble is numbered 90. In this way, for a random access preamble occupying one physical resource block, the user equipment transmits the random access preamble by using the physical resource block with the number of 90, and the user equipment utilizes the random access preamble occupying three physical resource blocks. The three physical resource blocks numbered 90, 91, and 92 transmit the random access preamble.
  • the user equipment may determine the random access failure in different manners, which may be preset by the user. For example, the user equipment starts a random access preamble and starts a timer, if the user equipment meets the preset time in the timer. If the feedback information of the network side device is not received, the random access failure is determined; or the user equipment retransmits the random access preamble when the feedback information of the network side device is not received, and The number of retransmissions is counted. When the feedback information of the network side device is not received after retransmission for n times, the random access failure is determined, where n is a positive integer greater than or equal to 1. Due to the 7 ⁇ indicated by the second preamble format. Meet the following conditions: T SEO , M is large

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de transmission d'un préambule d'accès aléatoire, qui se rapportent au domaine des communications et améliorent un taux d'utilisation de ressources d'un canal d'accès aléatoire. Le procédé comprend les étapes suivantes : recevoir des informations de configuration de préambule et des informations de configuration de ressource envoyées par un dispositif côté réseau, les largeurs de bande de fréquences de ressources qui sont indiquées par les informations de configuration de ressource et peuvent être utilisées pour transmettre un préambule d'accès aléatoire sont d'au moins NRB RACH blocs de ressources physiques, où NRB RACH est un nombre entier et 1≤NRB RACH ≤3 ; produire le préambule d'accès aléatoire selon les informations de configuration de préambule ; et déterminer les ressources utilisées pour transmettre le préambule d'accès aléatoire en fonction des informations de configuration de ressource, et utiliser les ressources pour transmettre le préambule d'accès aléatoire, les largeurs de bande de fréquences des ressources utilisées pour transmettre le préambule d'accès aléatoire étant de NRB RACH blocs de ressources physiques, où les NRB RACH blocs de ressources physiques contiennent NSC RACH sous-porteuses, et NSC RACH = (180000 / Δf RA) × NRB RACH est un nombre entier, où Δf RA est un intervalle de sous-porteuse du préambule d'accès aléatoire, et 312,5 Hz≤Δf RA≤625 Hz. Les modes de réalisation de la présente invention sont utilisés pour transmettre un préambule d'accès aléatoire.
PCT/CN2014/083055 2014-07-25 2014-07-25 Procédé et dispositif de transmission de préambule d'accès aléatoire Ceased WO2016011667A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2014/083055 WO2016011667A1 (fr) 2014-07-25 2014-07-25 Procédé et dispositif de transmission de préambule d'accès aléatoire
CN201480031489.7A CN105474725B (zh) 2014-07-25 2014-07-25 一种传输随机接入前导的方法和设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/083055 WO2016011667A1 (fr) 2014-07-25 2014-07-25 Procédé et dispositif de transmission de préambule d'accès aléatoire

Publications (1)

Publication Number Publication Date
WO2016011667A1 true WO2016011667A1 (fr) 2016-01-28

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PCT/CN2014/083055 Ceased WO2016011667A1 (fr) 2014-07-25 2014-07-25 Procédé et dispositif de transmission de préambule d'accès aléatoire

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CN (1) CN105474725B (fr)
WO (1) WO2016011667A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
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CN107872817A (zh) * 2016-09-27 2018-04-03 华为技术有限公司 一种资源配置的方法、网络设备及终端设备
CN108307506A (zh) * 2017-01-13 2018-07-20 北京三星通信技术研究有限公司 配置随机接入资源的方法和装置及随机接入方法和装置
CN110214427A (zh) * 2019-04-23 2019-09-06 北京小米移动软件有限公司 反馈信息的发送、接收方法、装置及介质
WO2020199190A1 (fr) * 2019-04-04 2020-10-08 Zte Corporation Système et procédé permettant de configurer des préambules d'accès aléatoire
WO2022198473A1 (fr) * 2021-03-24 2022-09-29 Oppo广东移动通信有限公司 Procédé de configuration de ressources, dispositif terminal et dispositif de réseau

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CN108024361B (zh) 2016-11-04 2023-09-12 中兴通讯股份有限公司 确定方法、接入、发送、处理方法及装置、基站及终端
CN110213834B (zh) * 2017-01-06 2020-09-29 华为技术有限公司 随机接入方法、用户设备和网络设备
CN109714138B (zh) * 2017-10-26 2024-07-02 北京三星通信技术研究有限公司 一种前导码的生成方法，配置方法和设备
WO2019004694A1 (fr) 2017-06-26 2019-01-03 Samsung Electronics Co., Ltd. Procédé de génération de préambule, procédé de configuration de préambule et équipement associé, méthode d'accès direct, dispositif, équipement utilisateur et station de base
CN109803435B (zh) * 2017-11-16 2023-04-07 北京三星通信技术研究有限公司 随机接入方法及其设备
CN109429355B (zh) * 2017-08-23 2022-02-01 维沃移动通信有限公司 一种随机接入的处理方法、用户终端及网络侧设备
CN113260077B (zh) * 2017-11-15 2022-08-23 华为技术有限公司 随机接入的方法、用户设备及网络设备
CN112583755B (zh) * 2019-09-30 2022-05-06 华为技术有限公司 卫星通信方法和相关通信设备

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CN101478792A (zh) * 2008-01-03 2009-07-08 大唐移动通信设备有限公司 一种专用随机接入资源预留方法和基站
CN101820301A (zh) * 2010-04-27 2010-09-01 安徽创毅通信科技有限公司 一种长期演进系统中随机接入前导低复杂度生成方法
CN101945479A (zh) * 2008-01-07 2011-01-12 三星电子株式会社 传输随机接入前导信号的设备和方法
US20120155405A1 (en) * 2010-12-20 2012-06-21 Samsung Electronics Co., Ltd. Apparatus and method for receiving a random access channel for a wireless communication system

Patent Citations (4)

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CN101478792A (zh) * 2008-01-03 2009-07-08 大唐移动通信设备有限公司 一种专用随机接入资源预留方法和基站
CN101945479A (zh) * 2008-01-07 2011-01-12 三星电子株式会社 传输随机接入前导信号的设备和方法
CN101820301A (zh) * 2010-04-27 2010-09-01 安徽创毅通信科技有限公司 一种长期演进系统中随机接入前导低复杂度生成方法
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107872817A (zh) * 2016-09-27 2018-04-03 华为技术有限公司 一种资源配置的方法、网络设备及终端设备
CN107872817B (zh) * 2016-09-27 2021-02-09 华为技术有限公司 一种资源配置的方法、网络设备及终端设备
CN108307506A (zh) * 2017-01-13 2018-07-20 北京三星通信技术研究有限公司 配置随机接入资源的方法和装置及随机接入方法和装置
CN108307506B (zh) * 2017-01-13 2023-08-29 北京三星通信技术研究有限公司 配置随机接入资源的方法和装置及随机接入方法和装置
WO2020199190A1 (fr) * 2019-04-04 2020-10-08 Zte Corporation Système et procédé permettant de configurer des préambules d'accès aléatoire
CN113632578A (zh) * 2019-04-04 2021-11-09 中兴通讯股份有限公司 用于配置随机接入前导码的系统和方法
CN113632578B (zh) * 2019-04-04 2023-06-16 中兴通讯股份有限公司 用于配置随机接入前导码的系统和方法
US12096479B2 (en) 2019-04-04 2024-09-17 Zte Corporation System and method for configuring random access preambles
CN110214427A (zh) * 2019-04-23 2019-09-06 北京小米移动软件有限公司 反馈信息的发送、接收方法、装置及介质
WO2020215222A1 (fr) * 2019-04-23 2020-10-29 北京小米移动软件有限公司 Procédé et dispositif d'envoi et de réception d'informations de retour, et support
WO2022198473A1 (fr) * 2021-03-24 2022-09-29 Oppo广东移动通信有限公司 Procédé de configuration de ressources, dispositif terminal et dispositif de réseau

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CN105474725B (zh) 2019-03-26
CN105474725A (zh) 2016-04-06

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