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WO2009092332A1 - Procédé et système d'accès pour un équipement utilisateur - Google Patents

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

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Publication number
WO2009092332A1
WO2009092332A1 PCT/CN2009/070209 CN2009070209W WO2009092332A1 WO 2009092332 A1 WO2009092332 A1 WO 2009092332A1 CN 2009070209 W CN2009070209 W CN 2009070209W WO 2009092332 A1 WO2009092332 A1 WO 2009092332A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency band
working frequency
user equipment
signal
broadcast signal
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/CN2009/070209
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English (en)
Chinese (zh)
Inventor
Yang Yu
Shaohui Sun
Dingcheng Yang
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.)
Datang Mobile Communications Equipment Co Ltd
Original Assignee
Datang Mobile Communications Equipment 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 Datang Mobile Communications Equipment Co Ltd filed Critical Datang Mobile Communications Equipment Co Ltd
Publication of WO2009092332A1 publication Critical patent/WO2009092332A1/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
    • H04W74/00—Wireless channel access

Definitions

  • the present invention relates to the field of broadband wireless communication technologies, and in particular, to a user equipment access method and system. Background of the invention
  • the user equipment In the access mode of the existing wireless communication system, the user equipment (UE, User Equipment) is required to have a signal receiving capability that matches the system bandwidth.
  • the maximum system bandwidth reaches 20 MHz.
  • the signal receiving capability of the UE is set to support a maximum system bandwidth of 20 MHz, and the system The Synchronization Channel (SCH) and the Broadcast Channel (BCH) are located in the central area of the system bandwidth.
  • FIG. 1 is a schematic diagram of a frequency domain structure of a SCH/BCH in a prior art LTE system. Both SCH and BCH are placed at the center of the cell system bandwidth with a basic bandwidth of 1.25 MHz.
  • the UE When the UE starts or loses network service, it needs to capture the system through the initial cell search. The UE needs to identify the cell it will camp on and demodulate the system information in the cell BCH. In this process, the UE scans the SCH, implements time-frequency synchronization through the SCH, and obtains the cell identifier. The UE receives the broadcast information of the system, and according to the time-frequency resource allocation information of the uplink and downlink random access channel indicated by the system broadcast information, the UE initiates an initial Random access process. After the uplink synchronization is completed, the UE and the base station will continue to exchange high-level signaling to complete the UE's resident operation in the cell.
  • the UE signal receiving capability defined in LTE is 20 MHz of the maximum system bandwidth of the system, so there is no need to jump on the system bandwidth to receive signals.
  • the base station may instruct the UE to receive and process signals of a specified frequency band according to the signal processing capability of the UE and the allocation of system resources.
  • the user can conveniently perform broadcast information, cell measurement, and cell reselection on the central frequency band of the monitoring system.
  • Broadband wireless communication will become the main development direction of mobile communication in the future.
  • the maximum wireless communication bandwidth can reach 100MHz.
  • the increase of the bandwidth of the wireless communication system may result in multiple choices of bandwidth resource allocation.
  • the system bandwidths that different operators may allocate are different, and the signal receiving capabilities of the UE are also different. Therefore, for the next generation broadband wireless communication system.
  • the current wireless access mode it is obviously unrealistic to require the UE to have a signal receiving capability that matches the system bandwidth. It can be seen that the existing wireless access mode cannot adapt to user access under a large bandwidth system.
  • the embodiment of the invention provides a user equipment access method, which can adapt to wireless access under a large system bandwidth.
  • the embodiment of the invention further provides a user equipment access system, a user equipment and a base station, which can adapt to wireless access under a large system bandwidth.
  • a user equipment access method includes:
  • PBCH Primary Broad channel
  • the user equipment receives the downlink synchronization signal and the primary broadcast signal to perform system access.
  • a user equipment access system includes:
  • a base station configured to divide a system frequency band into one or more operating frequency bands, each working The intermediate position of the frequency band is set to SCH and PBCH; the downlink synchronization signal is transmitted on the SCH of each working frequency band, and the primary broadcast signal is transmitted on the PBCH of each working frequency band, the primary broadcast signal including information required for the user equipment to access the system ;
  • the user equipment is configured to receive a downlink synchronization signal and a primary broadcast signal sent by the base station, and perform system access.
  • a user equipment including:
  • the initial random access initiating unit is configured to receive a downlink synchronization signal and a primary broadcast signal sent by the base station, select a cell whose capability matches the service, initiate initial random access at the initial access frequency, and report its own signal receiving capability to the base station.
  • Signal processing capability
  • a jump execution unit configured to receive a jump indication sent by the base station, perform a working frequency band jump according to the indication, and adjust a carrier frequency frequency point of the receiver.
  • a base station comprising:
  • a working frequency division module configured to divide a system frequency band into one or more working frequency bands, and set an SCH and a PBCH in an intermediate position of each working frequency band;
  • a downlink synchronization signal sending module configured to send a downlink synchronization signal in a SCH of each working frequency band set by the working frequency band dividing module
  • a main broadcast signal sending module configured to send a main broadcast signal in a PBCH of each working frequency band set by the working frequency band dividing module.
  • the user equipment access method, the system user equipment, and the base station divide the broadband frequency band into one or more working frequency bands, and set the SCH/BCH at the center position of each working frequency band. All users perform initial downlink synchronization from a certain SCH/BCH of the cell and initiate initial random access, and then jump to the working frequency band according to the system information indication of the cell, so that the UE signal receiving capability and system bandwidth are well solved.
  • the problem of mismatch makes the cell compatible with UEs of different capabilities. After the UE enters the working frequency band, it receives SCH and BCH in the working frequency band, and does not have to jump to a specific frequency point to read broadcast frequently. This way It can adapt to wireless access under large system bandwidth.
  • FIG. 1 is a schematic diagram of a frequency domain structure of a SCH/BCH in a prior art LTE system
  • FIG. 2 is a schematic diagram of a system band division and a SCH/BCH location according to an embodiment of the present invention. Mode for carrying out the invention
  • Embodiments of the present invention provide a user equipment access method for a broadband wireless communication system, which divides a system frequency band into one or more working frequency bands, and sets an SCH, a primary broadcast channel (PBCH), and a public broadcast in an intermediate position of each working frequency band.
  • a public broadcast signal is transmitted on a common broadcast channel.
  • the manner of dividing the system frequency band may be: dividing the system frequency band into one or more working frequency bands according to the signal receiving capability of the lowest level user equipment defined by the system, and the bandwidth of each working frequency band may be equal to the lowest level user equipment. The bandwidth that can be received.
  • the signal receiving capabilities of the user equipment defined in the system are: 5MHz, 10MHz, 15MHz, 20MHz and 40MHz, respectively, the system frequency band can be divided into multiple jobs according to the signal receiving capability of the lowest level user equipment, ie 5MHz. Band, the bandwidth of each operating band is 5MHz.
  • the SCH and BCH are set in the middle of each working band.
  • FIG. 2 is a schematic diagram of a system band division and a location of a SCH/BCH according to an embodiment of the present invention.
  • the system band is 60MHz
  • the signal receiving capability of the lowest level user equipment in the system is 5MHz.
  • the system band is divided into 12 operating bands with a bandwidth of 5MHz.
  • the SCH and BCH are set in the middle of each working band. .
  • the downlink synchronization signal is sent on the SCH for downlink time-frequency synchronization, cell identification, frame timing, and frequency point identification.
  • the downlink synchronization signals transmitted on the SCH of each working band may be the same or different.
  • the SCH should have good autocorrelation, cross-correlation, anti-frequency offset, anti-noise capability, and facilitate the structure of the receiver.
  • the primary broadcast signal is transmitted on the PBCH, and the primary broadcast signal includes information required by the user equipment to access the system, including: system bandwidth information, random access information, and related information in the working frequency band.
  • the public broadcast signal is transmitted on the common broadcast channel, and the public broadcast signal includes other system information, such as neighbor cell information, cell reselection information, and cell measurement information. Since the public broadcast signal contains a large amount of information, it can be further optimized to: divide the public broadcast signal into one or more information blocks, and distribute them in the frequency domain, and transmit the order of each information block in each connected frame. Shift. The specific way is:
  • the public broadcast signal is divided into one or more information blocks; the public broadcast signal includes system information other than the main broadcast signal, such as: cell selection information, reselection information, and measurement control information.
  • mapping each information block on a common broadcast channel of a working frequency band the working frequency bands of each information block mapping are different; transmitting corresponding information blocks on a common broadcast channel of each working frequency band; in each frame of the transmitted information block
  • the mapping order of the information blocks is cyclically shifted on the common broadcast channel of each working band with respect to the mapping order of the information blocks in the previous frame.
  • the public broadcast signal is divided into 12 information blocks, each of which is numbered from 0 to 11.
  • the information block 0 to the information block 11 are respectively mapped to the common broadcast channels of the 0th to 11th working bands, and the corresponding information blocks are transmitted on the common broadcast channel of each working band;
  • the information block The mapping order is shifted back by 1 bit on the common broadcast channel of each working band, that is, the information block 1 is mapped to the common broadcast channel of the 0th working band, and the information block 2 is mapped to the common broadcast channel of the 1st working band.
  • the block 11 is mapped to the common broadcast channel of the 10th working band, and the information block 0 is mapped to the common broadcast channel of the 11th working band; when the frame is t3, the mapping order of the information block is performed on the common broadcast channel of each working band. Move back 1 bit, and so on.
  • the UE may receive the information block on the common broadcast channel of the working frequency band in which it is located to acquire the public broadcast signal.
  • the complete public broadcast signal can be quickly received within one frame, and sufficient frequency domain diversity gain is obtained, and the receiving performance is good; for the UE with the lowest signal receiving capability, it can be in one
  • the public broadcast signal is received intact during the broadcast cycle as if it were operating in a relatively narrowband system.
  • the number of information blocks is equal to the number of operating frequency bands in the system, and this embodiment is only a preferred implementation. In other embodiments of the present invention, the number of information blocks may not be equal to the number of operating frequency bands, and the data blocks are divided according to actual conditions.
  • the mapping relationship can be:
  • the information block 0 to the information block 11 are sequentially mapped to the 0th to the 11th work, respectively.
  • mapping relationship can be: mapping the public broadcast signals to the 0th to the 11th respectively.
  • a common broadcast channel of the working frequency band, and a complete public broadcast signal is transmitted on the common broadcast channel of each working frequency band.
  • the UE After the UE is powered on, the UE scans the SCH on the spectrum of the corresponding operator according to the operator record in the SIM card, and performs initial downlink synchronization signal acquisition, if the downlink synchronization signal is successfully detected. Then go to the next step to read the broadcast; if it is not successful, scan each possible SCH one by one until the detection decision is successful.
  • the UE performs RSRP detection to satisfy the S criterion.
  • the UE acquires system broadcast information from the primary broadcast signal of the PBCH, and learns system bandwidth, support services, initial access resource information, and the like. The UE selects the appropriate cell to match the capability and service to prepare for access.
  • the UE directly selects the current frequency band. If the initial access frequency is not at the center of the system bandwidth, the UE performs carrier frequency offset adjustment according to the indication of the primary broadcast signal. Then, the UE performs downlink synchronization correction, receives the primary broadcast signal, initiates an initial random access procedure according to the initial access resource indicated by the system, and performs a cell registration operation.
  • the UE initiates initial random access on the initial access frequency point, and reports its own signal receiving capability and signal processing capability to the base station; the base station allocates uplink access according to the signal receiving capability and signal processing capability of the UE and the load condition of each working frequency band.
  • the channel resource indicates that the UE jumps to a suitable working frequency band; the UE performs a working frequency band jump according to the indication, and adjusts a carrier frequency frequency point of the receiver.
  • the initial random access of the UE in the working frequency band is completed at the initial access frequency.
  • the UE After receiving the indication from the base station, the UE jumps to the working frequency band, and does not need to perform initial random access again in the working frequency band, according to the indication of the system.
  • a signaling connection is reliably established for high-level signaling interaction.
  • the specific process of initiating random access at this time may be: The UE receives the SCH in the working frequency band.
  • the downlink synchronization signal is sent to perform synchronization correction; the UE receives the primary broadcast signal sent on the PBCH of the working frequency band, acquires uplink access channel resource information of the working frequency band, initiates random access, and performs cell registration operation.
  • the random access may be a non-contentious random access.
  • the base station can allocate the uplink access channel resources according to the number of UEs and the access success rate in each working frequency band, so that the random access has a sufficient probability of success, and the UE initiates a random access procedure in the access channel resources allocated by the base station.
  • the cell reselection needs to be performed.
  • the measurement range of cell reselection may have certain restrictions. The following details: For co-frequency reselection, all neighboring cells in the same working frequency band may be considered, regardless of different working bands of neighboring cells, because the cell The reason for the reselection is that the UE is far away from the original serving cell, and the signal strength in the frequency selective channel of each frequency point of the original cell is different. If searching for each working frequency band in the adjacent cell, it may be better in the short term. Signal, but from the long-term statistics, the average signal power of each working frequency band is consistent, so the measurement work of different working frequency bands of adjacent cells is meaningless and wastes time.
  • one operating band of all neighboring cells outside the system band of the own cell may be considered, regardless of the multiple operating bands of the neighboring cell, for the above reasons.
  • the user equipment reads the system broadcast information from the neighboring cell, and learns the system bandwidth, the support service, the initial access resource information, and the like.
  • the UE records all the possible cell information, and selects the cell that best matches its own capability and service to prepare for access.
  • the specific cell reselection mode may be: the UE obtains the signal strength of all the neighboring cells except the system band of the local cell, and selects the cell with the matching function and the service to perform the inter-frequency reselection in the cell with the appropriate signal strength; or, the user equipment Obtaining the signal strength of one working band of all neighboring cells except the system band of the own cell, and selecting the capability in a cell with suitable signal strength Inter-frequency reselection is performed on the cell that matches the service.
  • An embodiment of the present invention further provides a user equipment access system, including:
  • a base station configured to divide a system frequency band into one or more working frequency bands, where an SCH and a PBCH are set at an intermediate position of each working frequency band; a downlink synchronization signal is sent on an SCH of each working frequency band, and is sent on a PBCH of each working frequency band a primary broadcast signal, the primary broadcast signal including information required by the user equipment to access the system;
  • the user equipment is configured to receive a downlink synchronization signal and a primary broadcast signal sent by the base station, and perform system access.
  • the base station can divide the system frequency band according to the signal receiving capability of the lowest level user equipment defined by the system.
  • the base station may further be configured to: divide the public broadcast signal into one or more information blocks; the public broadcast signal includes system information other than the main broadcast signal; and set a public broadcast in an intermediate position of each working frequency band a channel, each information block is mapped on a common broadcast channel of a different working frequency band, and a corresponding information block is transmitted on a common broadcast channel of each working frequency band; in each frame of the transmitted information block, the mapping order of the information blocks is relatively The mapping order of the information blocks in the previous frame is cyclically shifted on the common broadcast channel of each working frequency band;
  • the user equipment may be further configured to: receive an information block sent by the base station on a public broadcast channel of a working frequency band in which it is located, and obtain a public broadcast signal.
  • the embodiment of the invention further provides a user equipment, which may include:
  • the initial random access initiating unit is configured to receive a downlink synchronization signal and a primary broadcast signal sent by the base station, select a cell whose capability matches the service, initiate initial random access at the initial access frequency, and report its own signal receiving capability to the base station.
  • Signal processing capability
  • a jump execution unit configured to receive a jump indication sent by the base station, perform a working frequency band jump according to the indication, and adjust a carrier frequency frequency point of the receiver.
  • the foregoing user equipment may further include:
  • the random access initiating unit is configured to receive a downlink synchronization signal sent on the SCH of the working frequency band where the user equipment is located, perform synchronization correction, and receive a primary broadcast signal sent on the PBCH of the working frequency band where the user equipment is located, and obtain an uplink connection of the working frequency band. Incoming channel resource information, initiating random access.
  • the public broadcast signal acquiring module is configured to receive the information block sent by the base station on the public broadcast channel of the working frequency band where the user equipment is located, and obtain the public broadcast signal.
  • the same-frequency reselection unit is configured to acquire signal strengths of all neighboring cells in the same working frequency band, and select a cell with the matching capability and the service matching cell in the cell with the appropriate signal strength to perform the same-frequency reselection.
  • the inter-frequency reselection unit is configured to obtain signal strength of an operating band of all neighboring cells except the system band of the local cell, and select a cell with matching capability and service to perform inter-frequency reselection in a cell with suitable signal strength.
  • the embodiment of the invention further provides a base station, which may include:
  • a working frequency division module configured to divide a system frequency band into one or more working frequency bands, and set an SCH and a PBCH in an intermediate position of each working frequency band;
  • a downlink synchronization signal sending module configured to send a downlink synchronization signal in a SCH of each working frequency band set by the working frequency band dividing module
  • a main broadcast signal sending module configured to send a main broadcast signal in a PBCH of each working frequency band set by the working frequency band dividing module.
  • the foregoing base station may further include:
  • a public broadcast signal dividing module configured to divide the public broadcast signal into one or more information blocks
  • An information block sending module configured to set a common broadcast channel in an intermediate position of each working frequency band, and map each information block on a common broadcast channel of an operating frequency band, each information block
  • the working frequency bands of the shots are different; the corresponding information blocks are transmitted on the common broadcast channel of each working frequency band; in each frame of the transmitted information block, the mapping order of the information blocks is relative to the mapping order of the information blocks in the previous frame.
  • the cyclic shift is performed on the common broadcast channel of the working band.
  • the embodiments of the present invention provide an access method, system user equipment, and base station for a future large-bandwidth wireless communication system, and divide the system frequency band into one or more working frequency bands to be compatible with various signal receiving capabilities. If the UE does not match the system bandwidth, the operating band jumps according to the indication of the base station; the system sets the SCH and the BCH in each working frequency band, so that the UE can receive the working frequency band after receiving a working frequency band.
  • the SCH and BCH without having to jump frequently to a specific frequency point to read the broadcast.
  • the embodiment of the present invention improves the transmission mode of the public broadcast signal, so that the UE can obtain the frequency domain diversity gain when receiving the public broadcast signal.
  • the embodiment of the present invention also limits the range of cell reselection, and can accelerate the cell. Re-election process.

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

Abstract

La présente invention concerne un procédé et un système d'accès pour un équipement utilisateur. Le procédé comprend les étapes suivantes : la division d'une bande de fréquences du système en une ou plusieurs bandes de fréquences de travail ; l'établissement d'un canal de synchronisation (SCH) et d'un canal de diffusion (PBCH) au milieu de chaque bande de fréquences ; la transmission d'un signal de synchronisation de liaison descendante sur le canal SCH, et la transmission de signal de diffusion PBCH sur le canal PBCH, le signal de diffusion PBCH comportant l'information nécessaire à l'équipement utilisateur pour accéder au système ; la réception par l'équipement utilisateur du signal de synchronisation de liaison descendante et du signal de diffusion PBCH, et la réalisation d'accès au système. Le procédé et système selon la présente invention peuvent s'adapter à l'accès sans fil sous une grande largeur de bande du système.
PCT/CN2009/070209 2008-01-17 2009-01-19 Procédé et système d'accès pour un équipement utilisateur Ceased WO2009092332A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810056370.1 2008-01-17
CN2008100563701A CN101489285B (zh) 2008-01-17 2008-01-17 用户设备接入方法及系统

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WO2009092332A1 true WO2009092332A1 (fr) 2009-07-30

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EP3501191A4 (fr) * 2016-08-18 2020-04-15 Sierra Wireless, Inc. Informations de commande de liaison descendante de diffusion pouvant être décodées par une largeur de bande variable
RU2730084C1 (ru) * 2017-03-24 2020-08-17 Гуандун Оппо Мобайл Телекоммьюникейшнс Корп., Лтд. Способ передачи информации, оконечное устройство и сетевое устройство
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CN107623932B (zh) * 2016-07-15 2019-08-30 电信科学技术研究院 一种系统信息区域或网络区域的接入方法及装置
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CN107889156B (zh) * 2016-09-30 2022-10-11 中兴通讯股份有限公司 接入信息的发送、接收方法及装置，传输系统
CN109474951B (zh) * 2017-09-07 2021-05-11 华为技术有限公司 一种移动性测量方法、装置及系统
CN116261191B (zh) * 2019-12-25 2025-04-22 华为技术有限公司 小区重选方法、终端设备和网络设备
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US10945224B2 (en) 2011-09-09 2021-03-09 Samsung Electronics Co., Ltd. Apparatus and method for synchronizing and obtaining system information in wireless communication system
WO2013036021A3 (fr) * 2011-09-09 2013-05-02 Samsung Electronics Co., Ltd. Appareil et procédé de synchronisation et d'obtention d'informations système dans un système de communication sans fil
CN103782636A (zh) * 2011-09-09 2014-05-07 三星电子株式会社 用于在无线通信系统中同步并获得系统信息的装置及方法
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US11076384B2 (en) 2016-05-12 2021-07-27 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Signal transmission method, network device, and terminal device
EP3422651B1 (fr) * 2016-05-12 2021-10-06 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de transmission de signal et reception de signal correspondante
EP3501191A4 (fr) * 2016-08-18 2020-04-15 Sierra Wireless, Inc. Informations de commande de liaison descendante de diffusion pouvant être décodées par une largeur de bande variable
RU2730084C1 (ru) * 2017-03-24 2020-08-17 Гуандун Оппо Мобайл Телекоммьюникейшнс Корп., Лтд. Способ передачи информации, оконечное устройство и сетевое устройство
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US11950255B2 (en) 2017-03-24 2024-04-02 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Information transmission method, terminal device, and network device

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CN101489285A (zh) 2009-07-22

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