WO2007128236A1 - Procédé et système de distribution de ressources d'accès aléatoire de réseau sans fil - Google Patents

Procédé et système de distribution de ressources d'accès aléatoire de réseau sans fil Download PDF

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Publication number
WO2007128236A1
WO2007128236A1 PCT/CN2007/001466 CN2007001466W WO2007128236A1 WO 2007128236 A1 WO2007128236 A1 WO 2007128236A1 CN 2007001466 W CN2007001466 W CN 2007001466W WO 2007128236 A1 WO2007128236 A1 WO 2007128236A1
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WO
WIPO (PCT)
Prior art keywords
random access
frequency band
available
information
broadcast signal
Prior art date
Application number
PCT/CN2007/001466
Other languages
English (en)
Chinese (zh)
Inventor
Yusun Fu
Zhilin Zhao
Tao Cai
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.
Publication of WO2007128236A1 publication Critical patent/WO2007128236A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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]

Definitions

  • the present invention relates to resource allocation of a wireless network, and in particular, to a method and system for allocating frequency resources for random access of a wireless network, and a method and system for allocating time resources for random access of a wireless network.
  • HSDPA integrates a series of new wireless access technologies, including: Hybrid Automatic Repeat Request (HARQ), Adaptive Modulation and Coding (AMC), and Base Station (NodeB) control.
  • HARQ Hybrid Automatic Repeat Request
  • AMC Adaptive Modulation and Coding
  • NodeB Base Station
  • TTI shortest transmission time interval
  • HSUPA also improves the uplink throughput and peak rate of the system (from 2 Mbps of R99 to nearly 6 Mbps) by using HARQ and Fast-Scheduling technology on the uplink, and at the same time reduces the minimum ⁇ from 10 ms of R99 to 2 ms, in order to reduce the wireless connection.
  • the delay into the network provides the basis.
  • MTE Medium Term Evolution
  • LTE Long Term Evolution
  • the UMTS network has completed the medium-term evolution phase.
  • the network performance enhancements brought by HSDPA and HSUPA can basically meet the business needs before 2010 and have sufficient competitiveness compared with other cellular networks.
  • the long-term evolution of the UMTS network was also put on the agenda.
  • the 3GPP RAN Working Group convened a number of operators and equipment vendors to hold a special meeting in Canada to discuss issues and technical routes related to the long-term evolution of UMTS, as well as the establishment of standardized projects.
  • the downlink physical layer access technology of the LTE system is Orthogonal Frequency Division Multiple Access (OFDMA), and the upper 4 ⁇ physical layer is connected.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • RC Radio Network Controller
  • Embodiments of the present invention provide a method and system for allocating a random access resource for a wireless network, which are used to implement allocation of random access band resources and/or time resources, and distribute random access interference as evenly as possible among cells.
  • the network side broadcasts a broadcast signal through a broadcast channel of the cell, the broadcast signal includes available frequency band information, the available frequency band information is information indicating a frequency band usable for random access; and the mobile terminal receives the broadcast signal to obtain the available frequency band Information
  • the mobile terminal selects a frequency band from the frequency bands available for random access to initiate random access to the cell.
  • a distribution system for implementing the allocation method includes:
  • a broadcast device configured to broadcast a broadcast signal, where the broadcast signal includes available frequency band information,
  • the available frequency band information is information indicating a frequency band usable for random access;
  • the mobile terminal is configured to receive the broadcast signal, obtain the available frequency band information, and select one frequency band from the frequency band that can be used for random access. Random access.
  • the network side broadcasts a broadcast signal through a broadcast channel of the cell, where the broadcast signal includes available time slot information, the available time slot information is information indicating a time slot available for random access; the mobile terminal receives the broadcast signal, obtains a Describe the available time slot information;
  • the mobile terminal selects a time slot from the time slots available for random access to initiate random access to the cell.
  • a distribution system for implementing the allocation method includes:
  • a broadcast device configured to broadcast a broadcast signal, where the broadcast signal includes available time slot information, where the available time slot information is information indicating a time slot available for random access;
  • a mobile terminal configured to receive the broadcast signal, obtain the available time slot information, and select a time slot from the time slots available for random access to initiate random access.
  • the present invention broadcasts, by using a broadcast channel, information of a frequency band usable for random access to a mobile terminal, the available frequency band is equally divided into a plurality of random accesses from the total bandwidth supported by the mobile terminal.
  • One or more selected ones of the equal frequency bands, and the frequency bands allocated for random access allocated between adjacent cells are not interfered with each other as much as possible, and the present invention also broadcasts to the mobile terminal through the broadcast channel under certain conditions and can be used for randomization.
  • the information of the accessed time slot, and the time slots allocated for random access allocated between the adjacent cells are not interfered with each other as much as possible, so that the random access interference in the radio access network is distributed as evenly as possible among the cells in the long-term evolution phase. , thereby increasing the access probability, capacity, and throughput of the system.
  • 1 is an evolution plan diagram of a UMTS network
  • FIG. 2 is a diagram showing a relationship between a frequency band for random access and a frequency band for transmitting data in one cell;
  • Embodiment 3 is a flow chart of a method for allocating frequency resources for random access according to Embodiment 1 of the present invention
  • FIG. 4 is a block diagram of a system for allocating frequency resources for random access according to an embodiment of the present invention.
  • FIG. 5 is a flow chart of a method for allocating time resources for random access according to Embodiment 2 of the present invention.
  • FIG. 6 is a block diagram of a system for allocating time resources for random access according to Embodiment 2 of the present invention.
  • FIG. 7 is a subcarrier partitioning diagram for random access according to an embodiment of the present invention.
  • FIG. 8 is a frequency band allocation diagram that different cell UEs may use for random access according to an embodiment of the present invention. Mode for carrying out the invention
  • the embodiment of the present invention provides a method for allocating frequency resources required for implementing random access in the initial access and resource request phase of the mobile terminal.
  • the method includes the following steps:
  • the network side broadcasts a broadcast signal by using a broadcast channel, where the broadcast signal includes available frequency band information, and the available frequency band information is information indicating a frequency band that can be used for random access;
  • the mobile terminal receives a broadcast signal, and obtains available frequency band information.
  • S106. The mobile terminal selects one frequency band from the frequency bands available for random access to initiate random access.
  • the random access frequency resource allocation system 10 includes: a broadcast device 20, configured to broadcast a broadcast signal, the broadcast signal includes available frequency band information, and the available frequency band information indicates that the available information is available. Information of a frequency band of random access; and a mobile terminal 30 for receiving a broadcast signal, obtaining available frequency band information, and selecting a frequency band from a frequency band available for random access to initiate random access.
  • FIG. 5 shows a method for allocating time resources required for implementing random access according to Embodiment 2 of the present invention, including the following steps:
  • the network side broadcasts a broadcast signal through a broadcast channel, where the broadcast signal includes available time slot information, and the available time slot information is information indicating a time slot available for random access;
  • the mobile terminal receives the broadcast signal, and obtains available time slot information.
  • the mobile terminal selects one time slot from the time slots available for random access to initiate random access.
  • the random access time resource allocation system 40 includes: a broadcast device 50, configured to broadcast a broadcast signal, the broadcast signal includes available time slot information, and the available time slot information is represented. Information for a time slot that can be used for random access; and a mobile terminal 60 for receiving a broadcast signal, obtaining available time slot information, and selecting a time slot from a time slot available for random access to initiate random access.
  • the third embodiment of the present invention combines the first embodiment with the solution of the second embodiment, that is, by playing a broadcast signal, transmitting frequency resource information and time slot information for random access to the terminal, and the terminal according to the obtained frequency resource information. And time slot information, select available time slots and frequency resources to achieve random access.
  • the embodiment of the invention provides a method for allocating frequency/time resources used for random access between different cells, so that random access interference is distributed as evenly as possible among cells to improve the system. Access probability, capacity, and throughput.
  • the allocation method includes the following basic points:
  • BCH broadcast channel
  • FIG. 7 shows a cell with a bandwidth of 20 MHz.
  • the bandwidth of each random access is 1.25 MHz, which is divided into 16 equal parts, numbered 0, ..., 15.
  • the BCH tells the UE number, which may be one of 0 to 15, or may be a set (such as several), which may be determined according to an application scenario.
  • the BCH needs to broadcast access time slots on the frequency bands corresponding to the different cells.
  • An access slot refers to a slot that is accessed on an access band, and other slots can be used for data transmission. For example, 1, 11, 21 transmit access signals, and other transmit data signals, then 1, 11, 21 are access slots.
  • the access slots between different cells are as different or evenly distributed as possible. It is assumed that the same frequency band is set as the random access frequency band in the cell 1, the cell 2, and the cell 3. If the cell 1 is connected by the time slots 1, 11, 21... In the time slot, cell 2 can use time slots 2, 12, 22... as access time slots, and cell 3 can use time slots 3, 13, 23... as access time slots.
  • UE1 belongs to the user of cell 1
  • UE2 belongs to the user of cell 2
  • the frequency bands occupied by UE1 and UE2 do not overlap each other, and so on.
  • the UE detects the broadcast signal of the BCH, and selects one of its designated frequency bands and/or time slots to initiate random access.

Abstract

L'invention concerne un procédé de distribution de ressources d'accès aléatoire de réseau sans fil. Ledit procédé fait appel à la radiodiffusion côté réseau d'un signal de radiodiffusion sur le canal de radiodiffusion (BCH) d'une cellule, le signal de radiodiffusion comprenant des informations et/ou un intervalle de bande de fréquences utilisables; un terminal mobile reçoit le signal de radiodiffusion et obtient les informations et/ou un intervalle de bande de fréquences utilisables; le terminal mobile sélectionne une information et/ou un intervalle de bande de fréquences à partir des informations et/ou un intervalle de bande de fréquences utilisés pour l'accès aléatoire afin de lancer l'accès aléatoire à la cellule. L'invention concerne également un système de distribution de ressources d'accès aléatoire de réseau sans fil. L'invention permet la distribution de ressources d'accès aléatoire et/ou la distribution de ressources temporelles, une interférence d'accès aléatoire pouvant en moyenne être distribuée dans une cellule autant que possible.
PCT/CN2007/001466 2006-04-29 2007-04-29 Procédé et système de distribution de ressources d'accès aléatoire de réseau sans fil WO2007128236A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006100780579A CN100450308C (zh) 2006-04-29 2006-04-29 无线网络随机接入资源的分配方法及系统
CN200610078057.9 2006-04-29

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Publication Number Publication Date
WO2007128236A1 true WO2007128236A1 (fr) 2007-11-15

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CN (1) CN100450308C (fr)
WO (1) WO2007128236A1 (fr)

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EP2160048B1 (fr) 2007-09-24 2015-12-23 ZTE Corporation Procédé d'accès aléatoire de terminal pour système de communications radio cellulaires et procédé pour générer un identifiant de groupe
CN101400129B (zh) * 2007-09-28 2011-07-13 中兴通讯股份有限公司 随机接入资源分配方法
CN101472345B (zh) * 2007-12-29 2010-11-24 大唐移动通信设备有限公司 调度标识确定、配置方法与装置及随机接入方法与装置
CN101483917A (zh) * 2008-01-10 2009-07-15 华为技术有限公司 频带接入切换方法、终端和基站
CN101505541B (zh) * 2008-02-04 2010-11-10 上海贝尔阿尔卡特股份有限公司 用于传输随机接入时间控制信息的方法及基站和用户设备
US8971260B2 (en) * 2008-08-04 2015-03-03 Panasonic Intellectual Property Corporation Of America Base station, terminal, band allocation method, and downlink data communication method
CN101815344A (zh) * 2009-02-20 2010-08-25 大唐移动通信设备有限公司 一种多载波系统的接入方法及设备
CN101925157B (zh) * 2009-06-16 2015-02-11 电信科学技术研究院 传输非驻留载波连接信息的方法、系统及装置
CN102065371B (zh) * 2009-11-18 2015-04-01 中兴通讯股份有限公司 未获取分量载波的系统消息的处理方法及装置
CN102665283A (zh) * 2012-04-13 2012-09-12 中国科学院上海微系统与信息技术研究所 一种适用于智能电网的分布式无线信道分配方法及装置
CN112218382A (zh) * 2019-07-12 2021-01-12 普天信息技术有限公司 随机接入方法、网络侧设备及移动终端

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CN100450308C (zh) 2009-01-07

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