WO2012055299A1 - Procédé et système d'accès aléatoire pour un équipement utilisateur - Google Patents

Procédé et système d'accès aléatoire pour un équipement utilisateur Download PDF

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Publication number
WO2012055299A1
WO2012055299A1 PCT/CN2011/079256 CN2011079256W WO2012055299A1 WO 2012055299 A1 WO2012055299 A1 WO 2012055299A1 CN 2011079256 W CN2011079256 W CN 2011079256W WO 2012055299 A1 WO2012055299 A1 WO 2012055299A1
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WO
WIPO (PCT)
Prior art keywords
random access
resource
downlink
uplink
occupied
Prior art date
Application number
PCT/CN2011/079256
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English (en)
Chinese (zh)
Inventor
魏巍
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012055299A1 publication Critical patent/WO2012055299A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the incoming process brings many resource conflicts, such as: In the case of asymmetric carriers, all component carriers must be backward compatible to enable all bandwidth capable UEs to access; the base station (BS, Base Station) resource scheduling exists more A large limitation, in order to distinguish the downlink carrier corresponding to the uplink carrier, it is necessary to allocate more resources for the uplink carrier, and the increase of resources leads to loss of false alarm and false detection performance; Carrier funding The source request brings an increase in overhead, congestion of downlink and uplink random access resources caused by a large number of UEs simultaneously initiating random access, and the like. Summary of the invention
  • the present invention provides a random access method for a user terminal, and the method includes:
  • the base station (BS) classifies the random access resources according to the bandwidth capability and the backward compatibility characteristic of the user terminal (UE);
  • the method further includes:
  • the BS dynamically switches the type of the random access resource
  • the UE performs a random access procedure according to the dynamically switched random access resource.
  • the UE performs a random access procedure on the occupied uplink resource, specifically: the UE sends a random access request on the occupied uplink resource;
  • the present invention also provides a random access system for a user terminal, the system comprising: a BS and a UE, where
  • the BS is configured to classify the random access resources according to the bandwidth capability and the backward compatibility feature of the UE;
  • the UE is configured to initiate a normal cell search. After the UE successfully acquires system information on a downlink random access resource with the same bandwidth capability and backward compatibility, the UE only occupies the downlink.
  • the link random access resources belong to the same class of uplink resources, and perform a random access procedure on the occupied uplink resources according to the acquired system information.
  • the BS is further configured to: preset a dynamic access resource dynamic scheduling threshold, where the BS dynamically switches the random access resource when the load of the random access resource occupied by the UE exceeds the dynamic scheduling threshold of the random access resource type;
  • the UE is further configured to perform a random access procedure according to the dynamically switched random access resource.
  • the UE is further configured to: send a random access request on the occupied uplink resource; correspondingly, the BS is further configured to: when receiving the random access request of the UE, only occupy the UE
  • the uplink resources on the matched uplink resources return a random access response to the UE.
  • a random access method and system for a user terminal provided by the present invention, by classifying random access resources, effectively reducing downlink and uplink random access caused by a large number of UEs simultaneously initiating random access
  • the BS can dynamically switch the type of the random access resource according to the load status of the different random access resources to adapt to the change of the random access request of different types of UEs in the network, and further reduce the random access resources. Congestion. DRAWINGS
  • 1 is a flowchart of a random access method of a user terminal according to the present invention
  • 2 is a schematic structural diagram of a random access system of a user terminal according to the present invention. detailed description
  • the present invention provides a random access method for a user terminal, in which a service asymmetry between an uplink and a downlink in a wireless communication system causes carrier asymmetry of uplink and downlink when carrier aggregation occurs.
  • the resources of the random access are classified, for example, according to the bandwidth capability and the backward compatibility feature of the UE, and different random access resources can only access a specific type of UE;
  • the UE first initiates a normal cell search. After the system information is successfully acquired on the downlink random access resource with the same UE capability and backward compatibility, the UE can only occupy the downlink random access resource.
  • the same class of uplink resources and then the UE performs a random access procedure on the occupied uplink resources according to the acquired system information.
  • the present invention effectively reduces the congestion of downlink and uplink random access resources caused by a large number of UEs simultaneously initiating random access by classifying the random access resources. Meanwhile, the BS can be based on different random access resources.
  • the load condition dynamically switches the type of the random access resource to adapt to the change of the random access request of different types of UEs in the network, and further reduces the congestion of the random access resources.
  • the random access method of the present invention is further described in detail below with reference to FIG. 1. As shown in FIG. 1, the method mainly includes the following steps:
  • Step 101 The BS classifies the random access resources.
  • the BS can classify random access resources according to the bandwidth capability and backward compatibility characteristics of the UE.
  • Step 102 The BS presets a dynamic scheduling resource threshold for random access resources.
  • Step 103 The UE initiates a regular cell search.
  • Step 104 The UE successfully acquires system information from a downlink random access resource whose bandwidth capability and backward compatibility are the same.
  • Step 105 The UE occupies only the uplink resources belonging to the same classification as the downlink random access resources.
  • Step 106 Determine whether the load of the random access resource occupied by the UE exceeds the dynamic access resource dynamic scheduling threshold. If yes, go to step 107; otherwise, go to step 108.
  • step 107 the UE performs a random access procedure according to the dynamically switched random access resource.
  • the wireless is determined by the BS.
  • the bandwidth capability of the UE in the communication network When the UE performs the random access procedure, the BS sets one or more downlink component carrier groups, and each downlink constitutes a carrier group and one or several UE bandwidth capability uplinks. The carrier is matched, and a random access response message is set on each downlink component carrier group.
  • the BS receives the random access request of the UE, the BS only matches the uplink carrier that matches the current UE bandwidth capability.
  • the BS adopts a semi-static configuration manner of an uplink carrier and a downlink carrier or a carrier group, that is, increases or decreases corresponding to an uplink carrier according to changes and load conditions of the wireless communication network environment, and the like.
  • the downlink components form a carrier group, and the physical random access channel resources can be completely controlled within a reasonable range.
  • the present invention further provides a random access system for a user terminal.
  • the system includes: a base station 10 and a user terminal 20.
  • the base station 10 is configured to classify the random access resources according to the bandwidth capability and the backward compatibility feature of the user terminal 20.
  • the user terminal 20 is configured to initiate a normal cell search. After the user terminal 20 successfully acquires system information on the downlink random access resource with the same bandwidth capability and backward compatibility, the user terminal 20 only occupies the downlink.
  • the channel random access resources belong to the same class of uplink resources, and perform a random access procedure on the occupied uplink resources according to the acquired system information.
  • the base station 10 is further configured to: preset a random access resource dynamic scheduling threshold, and when the load of the random access resource occupied by the user terminal 20 exceeds a dynamic scheduling resource dynamic scheduling threshold, the base station 10 dynamically switches the random access resource. type;
  • the user terminal 20 is further configured to perform a random access procedure according to the dynamically switched random access resource.
  • the user terminal 20 performs a random access procedure on the occupied uplink resources, which is specifically:
  • User terminal 20 transmits a random access request on the occupied uplink resource
  • the base station 10 Upon receiving the random access request from the user terminal 20, the base station 10 returns a random access response to the user terminal 20 only on the downlink resources matching the uplink resources occupied by the user terminal 20.

Abstract

La présente invention concerne un procédé et un système d'accès aléatoire pour un équipement utilisateur (UE). Le procédé comprend les étapes suivantes : une station de base (BS) trie des ressources d'accès aléatoire selon la capacité de bande passante et la compatibilité descendante de l'UE ; l'UE lance une recherche de cellule normale ; lorsque l'UE a obtenu avec succès des informations système sur la ressource d'accès aléatoire de liaison descendante possédant la même capacité de bande passante et la même compatibilité descendante que lui, il occupe uniquement les ressources de liaison montante du même type que la ressource d'accès aléatoire de liaison descendante, et exécute une procédure d'accès aléatoire sur les ressources de liaison montante utilisées selon les informations système obtenues. Grâce à la présente invention, s'il existe des porteuses de liaison montante et de liaison descendante asymétriques durant une agrégation de porteuses à cause de l'asymétrie de services de liaison montante et de liaison descendante dans un système de communication sans fil, l'encombrement des ressources d'accès aléatoire de liaison descendante et de liaison montante provoqué par les accès aléatoires initiés simultanément par une grande quantité d'UE est réduit de façon importante.
PCT/CN2011/079256 2010-10-27 2011-09-01 Procédé et système d'accès aléatoire pour un équipement utilisateur WO2012055299A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010522903.8 2010-10-27
CN2010105229038A CN101977401A (zh) 2010-10-27 2010-10-27 一种用户终端的随机接入方法和系统

Publications (1)

Publication Number Publication Date
WO2012055299A1 true WO2012055299A1 (fr) 2012-05-03

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CN (1) CN101977401A (fr)
WO (1) WO2012055299A1 (fr)

Families Citing this family (9)

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CN101977401A (zh) * 2010-10-27 2011-02-16 中兴通讯股份有限公司 一种用户终端的随机接入方法和系统
EP2876955B1 (fr) 2012-08-10 2017-11-15 Huawei Technologies Co., Ltd. Procédé et station de base pour un accès aléatoire
CN105306385B (zh) * 2014-07-31 2019-09-10 腾讯科技（深圳）有限公司 下行网络带宽的控制方法及装置
EP3386261A4 (fr) * 2015-12-29 2018-12-05 Huawei Technologies Co., Ltd. Procédé et appareil pour accès aléatoire
CN107889271A (zh) * 2016-09-30 2018-04-06 北京信威通信技术股份有限公司 一种随机接入的方法及装置
KR20190102043A (ko) * 2017-01-05 2019-09-02 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 랜덤 액세스를 위한 방법 및 단말기 디바이스
CN108696906B (zh) * 2017-03-15 2022-02-18 普天信息技术有限公司 一种物联网中用户终端接入时延优化方法、基站及系统
WO2021189202A1 (fr) * 2020-03-23 2021-09-30 北京小米移动软件有限公司 Procédé et appareil de communication permettant un accès aléatoire et support de stockage lisible par ordinateur
CN115915471A (zh) * 2021-08-06 2023-04-04 华为技术有限公司 一种随机接入的方法及装置

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WO2007098641A1 (fr) * 2006-03-03 2007-09-07 Huawei Technologies Co., Ltd. Méthode d'accès s'appliquant à des équipements utilisateurs dans un système de communication mobile
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CN101505538A (zh) * 2009-03-13 2009-08-12 中兴通讯股份有限公司 一种多载波随机接入的方法和系统
CN101977401A (zh) * 2010-10-27 2011-02-16 中兴通讯股份有限公司 一种用户终端的随机接入方法和系统

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WO2007098641A1 (fr) * 2006-03-03 2007-09-07 Huawei Technologies Co., Ltd. Méthode d'accès s'appliquant à des équipements utilisateurs dans un système de communication mobile
CN101505538A (zh) * 2009-03-13 2009-08-12 中兴通讯股份有限公司 一种多载波随机接入的方法和系统
CN101977401A (zh) * 2010-10-27 2011-02-16 中兴通讯股份有限公司 一种用户终端的随机接入方法和系统

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