WO2012000268A1 - Système et procédé de commande flexible de balayage et de transfert intercellulaire de station mobile - Google Patents

Système et procédé de commande flexible de balayage et de transfert intercellulaire de station mobile Download PDF

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Publication number
WO2012000268A1
WO2012000268A1 PCT/CN2010/078563 CN2010078563W WO2012000268A1 WO 2012000268 A1 WO2012000268 A1 WO 2012000268A1 CN 2010078563 W CN2010078563 W CN 2010078563W WO 2012000268 A1 WO2012000268 A1 WO 2012000268A1
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WO
WIPO (PCT)
Prior art keywords
base station
scan
handover
neighboring base
mobile station
Prior art date
Application number
PCT/CN2010/078563
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English (en)
Chinese (zh)
Inventor
宋玉献
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 WO2012000268A1 publication Critical patent/WO2012000268A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information

Definitions

  • the present invention relates to a Worldwide Interoperability for Microwave Access (WiMAX) system, and more particularly to a system and method for flexibly controlling mobile station scan switching in a WiMAX system.
  • WiMAX Worldwide Interoperability for Microwave Access
  • the application scenarios of WiMAX communication systems mainly include fixed and mobile applications. That is to say, some users use WiMAX services at fixed locations such as homes or companies, while some users use WiMAX services in mobile locations such as mobile vehicles.
  • the signal strength of the serving base station Serving BS may become weaker and weaker during the mobile process, for example, the user is gradually moving away from the base station.
  • the mobile station MS Mobile Station, also called WiMAX mobile terminal
  • WiMAX mobile terminal is required to switch to a base station with better signal quality.
  • the corresponding scanning threshold and the switching threshold are configured on the base station, and are carried by the Trigger field in the Downlink Channel Descriptor (DCD) message sent by the base station. Notify the mobile station MS.
  • DCD Downlink Channel Descriptor
  • the mobile station scans according to the corresponding scan threshold and switching threshold.
  • the scanning mechanism is briefly described below.
  • the mobile station MS When the current signal quality is lower than the scanning threshold, the mobile station MS first completes the current serving base station by using two messages MOB_SCN-REQ and MOB_SCN-RSP (or the base station BS actively transmits the MOB_SCN-RSP message). The interaction of the Serving BS to notify the current serving base station Serving BS that the mobile station MS will leave the current serving base station Serving BS to scan the neighboring base station BS (Base Station), thereby obtaining the signal quality of the neighboring base station BS.
  • the mobile station MS can obtain the signal quality information of the neighboring base station, and then according to the signal quality and the switching threshold of the source side base station (ie, the current serving base station Serving BS) and the target side base station (ie, the scanned neighboring base station). Decide if you need to switch and cut when you decide to switch Which target side base station to switch to.
  • the source side base station ie, the current serving base station Serving BS
  • the target side base station ie, the scanned neighboring base station.
  • the current serving base station signal may already meet the current communication requirements, or the neighboring base station load is high, etc., and only want to use the scanning mechanism. Obtaining the signal quality of the neighboring base station without generating a handover by using a scanning mechanism; even if the signal quality of the target base station and the current serving base station reaches the switching threshold, the handover is not allowed.
  • the technical problem to be solved by the present invention is to provide a system and method for flexibly controlling mobile station scanning switching, which is used to solve the problem of application requirements of scanning only without switching when the mobile station scans and switches in the WiMAX system, and realizes scanning switching. Flexible control to adapt to a variety of application scenarios.
  • the present invention provides a system for flexibly controlling mobile station scanning handover, including a mobile station MS, a serving base station of a mobile station, and one or more neighboring base stations, where: the serving base station is set to: The mobile station broadcasts the neighboring area broadcast message, and sends a scan response message carrying the scan use information to the mobile station, where the scan use information is used to indicate whether each neighboring base station is a neighboring base station as a handover candidate;
  • the mobile station is configured to: receive a scan response message, scan the neighboring base station according to the start frame number and the scan duration, and determine, according to the scan use information in the received scan response message, whether the neighbor base station is a neighbor candidate of the handover candidate. The base station, if the scanning use information indicates that the neighboring base station is not a neighboring base station of the handover candidate, does not trigger handover to the neighboring base station after scanning.
  • the mobile station is further configured to: determine, according to the scanning use information, whether the neighboring base station is a neighboring base station as a handover candidate, if the scanning use information indicates the neighboring base station as a neighboring base station of the handover candidate, after the scanning, The mobile station determines whether it is possible to switch to the neighboring base station according to the scan result and the handover threshold. If the handover condition is met, the handover is performed. If the handover condition is not met, the neighbor base station is not used as the handover candidate target.
  • the scan usage information is modified by an existing field in the scan response message, or is a new dedicated field.
  • the scan response message is a scan response message sent by the serving base station or a response message sent by the serving base station to the scan request message sent by the mobile station.
  • the present invention also provides a method for flexibly controlling a mobile station scan switch, including:
  • the serving base station broadcasts a neighbor broadcast message to the mobile station, and sends a scan response message carrying the scan use information to the mobile station, where the scan use information is used to indicate whether each neighbor base station is a neighbor base station that is a candidate for handover;
  • the mobile station After receiving the scan response message, the mobile station scans the neighboring base station according to the start frame number and the scan duration, and determines, according to the scan use information in the received scan response message, whether the neighbor base station is a neighboring base station of the handover candidate, if scanning The usage information indicates that the neighboring base station is not a neighboring base station of the handover candidate, and the mobile station does not trigger the handover to the neighboring base station after scanning.
  • the method further includes: when the mobile station determines, according to the scanning use information, whether the neighboring base station is a neighboring base station of a handover candidate, if the scanning use information indicates the neighboring base station as a neighboring base station of the handover candidate, After the scanning, the mobile station determines whether it is possible to switch to the neighboring base station according to the scanning result and the switching threshold. If the handover condition is met, the handover is performed. If the handover condition is not met, the neighboring base station is not used as the handover candidate target.
  • the scan usage information is modified by an existing field in the scan response message, or is a newly added dedicated field.
  • the scan response message is a scan response message sent by the serving base station or a response message of the scan request message sent by the serving base station to the mobile station.
  • the system and method for flexibly controlling mobile station scan switching in the WiMAX system proposed by the present invention, by using the scanning use information in the MOB-SCN-RSP message to flexibly control whether the target neighboring base station BS is used as a handover candidate
  • the neighboring base station can flexibly control the mobile station to scan the base station that only needs to scan without switching, without triggering the handover process.
  • the scanning purpose information can also be used to indicate the scanning process after the scanning is triggered.
  • the invention realizes a scanning mechanism that does not trigger switching, and can be full It is currently necessary to scan data without the need for switching scenarios, thereby reducing unnecessary handovers and overcoming the degradation of quality of service due to handover failures.
  • FIG. 1 is a schematic diagram of a scanning process of a mobile station scanning in an existing WiMAX system
  • FIG. 2 is a schematic diagram showing a scanning flow of a mobile station scanning in a WiMAX system according to an embodiment of the present invention.
  • the present invention adds a dedicated indication field to the response message or response message sent by the base station to the mobile station, for example, adding a Scan result purpose field. And indicating whether a neighboring base station that is scanned is allowed to be a scanned candidate neighboring base station, and if configured as a candidate neighboring base station, the mobile station only needs to scan the neighboring base station, after scanning The handover procedure is not triggered, which achieves the purpose of not having to switch to the neighbor base station after scanning.
  • a system for flexibly controlling a mobile station scan handover includes a mobile station MS, a serving base station of a mobile station, and one or more neighbor base stations, where:
  • a serving base station configured to broadcast a neighbor broadcast message (MOB_NBR-ADV) to the mobile station, notify the mobile station of the current neighbor information, and send a scan response message carrying the scan result purpose information to the mobile station
  • the scanning usage information is used to indicate whether the neighboring base station is a neighboring base station of the handover candidate, and may have a value of 1 or 0.
  • the neighboring base station that is not used as the handover candidate is identified as the neighboring base station.
  • the neighboring base station is identified as the neighboring base station of the handover candidate.
  • the handover is further determined according to the scan result, and the determination may be further performed according to the handover threshold. If the threshold is switched, the switch is performed. If the switch threshold is not reached, the switch may not be performed.
  • the mobile station MS is configured to receive a scan response message, scan a neighboring base station according to a start frame number and a scan duration, and determine, according to the scan use information in the received scan response message, Whether the scanned neighboring base station is a neighboring base station of the handover candidate, and if yes, whether to perform handover according to the scan result and the handover threshold; if not, it is not necessary to perform handover.
  • the scan usage information may be obtained by tampering with an existing field in the scan response message, or may be a new field.
  • the neighboring base station BS is represented by adding a Scan result purpose to the BS index part and the BS ID part in the MOB_SCN-RSP message instead of the existing reserved field. Whether to allow switching occurs.
  • Table 1 the modified MOB-SCN-RSP message neighbor-BS index portion is displayed; as shown in Table 2, the modified MOB-SCN-RSP message-BS ID portion is displayed.
  • Scanning type 3 ObOOl Scanning with association level 0:
  • ObO 1 1 Scanning with association level 2: network assisted association
  • the scan response message MOB_SCN-RSP may be a scan response message sent by the base station or may be a response message of the scan request message MOB_SCN-REQ sent by the base station to the mobile station.
  • the method for flexibly controlling mobile station scan switching of the WiMAX system of the present invention includes:
  • the serving base station broadcasts a neighbor broadcast message (MOB_NBR-ADV) to the mobile station to notify the mobile station of the current neighbor information;
  • the serving base station sends a scan response message carrying the scan result purpose information to the mobile station, where the scan use information is used to indicate whether each neighboring base station is a neighboring base station that is a candidate for handover;
  • the scanning usage information may be a value of 1 or 0.
  • the neighboring base station that does not serve as a handover candidate is identified by the neighboring base station, and does not switch after scanning.
  • the neighboring base station is identified. It is a neighboring base station that is a handover candidate, and after scanning, further determines whether to perform handover according to the scan result and the handover threshold.
  • the mobile station MS After receiving the scan response message, the mobile station MS scans the neighboring base station according to the start frame number and the scan duration, and determines whether the neighbor base station is a candidate of the handover candidate according to the scan use information in the received scan response message.
  • the area base station if yes, judges whether to perform handover according to the scan result and the handover threshold; if not, it is not necessary to perform handover.
  • the scan usage information may be obtained by tampering with an existing field in the scan response message, or may be a new field Scan result purpose. If a neighboring base station in the scan response message sets the Scan result purpose to 1, it indicates that the neighboring base station is not used as a neighboring base station of the handover candidate, and after the scanning is finished, no matter how good the signal of the neighboring base station is, regardless of the Whether the signal reaches the handover threshold will not be used as a candidate neighboring base station for handover.
  • the present invention determines whether the neighboring base station can be used as a handover candidate neighboring base station after scanning the neighboring base station by using a Scan result purpose field in the specified neighboring base station in the scan response message, and if so, according to the scan result and switching
  • the threshold determines whether to perform the handover; if not, it is not necessary to perform the handover. In this way, it is possible to flexibly decide whether to proceed after scanning to obtain the scan result. Switching, which can be applied to scenarios that need to be switched, or to scenarios that only need to obtain scan results without switching, has good flexibility and applicability.
  • the system and method for flexibly controlling mobile station scan switching in the WiMAX system proposed by the present invention, by using the scanning use information in the MOB-SCN-RSP message to flexibly control whether the target neighboring base station BS is used as a handover candidate
  • the neighboring base station can flexibly control the mobile station to scan the base station that only needs to scan without switching, without triggering the handover process.
  • the scanning purpose information can also be used to indicate the scanning process after the scanning.
  • the present invention implements a scanning mechanism that does not trigger a handover, and satisfies the scenario requirements that currently need to scan data without switching, thereby reducing unnecessary handover and overcoming the degradation of service quality due to handover failure.

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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 porte sur un système et un procédé de commande flexible du balayage et du transfert intercellulaire d'une station mobile, lesquels système et procédé appartiennent au domaine technique des communications mobiles. Le système comprend une station mobile, une station de base de desserte pour la station mobile, et une ou plusieurs stations de base de cellule voisine. La station de base de desserte diffuse un message de diffusion de cellule voisine à la station mobile, et envoie à la station mobile un message de réponse de balayage contenant des informations de but de résultat de balayage, les informations de but de résultat de balayage étant utilisées pour indiquer si chaque station de base de cellule voisine est ou non la station de base de cellule voisine candidate pour le transfert intercellulaire ; la station mobile reçoit le message de réponse de balayage, balaye les stations de base de cellule voisine conformément au numéro de trame de début et à la durée de balayage, et détermine si chaque station de base de cellule voisine est ou non la station de base de cellule voisine candidate pour le transfert intercellulaire conformément aux informations de but de résultat de balayage contenu dans le message de réponse de balayage reçu ; s'il est indiqué que la station de base de cellule voisine n'est pas la station de base de cellule voisine candidate pour le transfert intercellulaire, la station mobile ne déclenche pas le transfert intercellulaire vers la station de base de cellule voisine après le balayage. Par application de la présente invention, le mécanisme de balayage qui ne déclenche pas le transfert intercellulaire est mis en œuvre, et le transfert intercellulaire non nécessaire est réduit.
PCT/CN2010/078563 2010-06-30 2010-11-09 Système et procédé de commande flexible de balayage et de transfert intercellulaire de station mobile WO2012000268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010216821.0 2010-06-30
CN201010216821.0A CN102316545B (zh) 2010-06-30 2010-06-30 一种灵活控制移动台扫描切换的系统及方法

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WO2012000268A1 true WO2012000268A1 (fr) 2012-01-05

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CN101375539A (zh) * 2006-01-02 2009-02-25 Lg电子株式会社 使用中继站的切换方法
US20090156210A1 (en) * 2007-12-17 2009-06-18 Motorola, Inc. Method for facilitating a mobile station to perform a fast handoff
CN101478794A (zh) * 2008-01-03 2009-07-08 北京市万格数码通讯科技有限公司 Mpt-1327集群通信系统实现跨基站自动过网的方法
CN101605370A (zh) * 2009-07-16 2009-12-16 上海交通大学 基于系统容量的WiMAX网络切换方法
JP2010103966A (ja) * 2008-09-26 2010-05-06 Kyocera Corp 中継局、無線通信中継方法、無線通信端末、および無線通信システム

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US6216004B1 (en) * 1998-06-23 2001-04-10 Qualcomm Incorporated Cellular communication system with common channel soft handoff and associated method
CA2642354C (fr) * 2006-02-21 2015-04-21 Telefonaktiebolaget Lm Ericsson (Publ) Transfert vers un point d'acces local restreint a partir d'un point d'acces global non restreint dans un reseau sans fil
CN101360343B (zh) * 2008-09-05 2011-09-14 华为终端有限公司 一种移动终端进行切换的方法及系统、移动终端
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101375539A (zh) * 2006-01-02 2009-02-25 Lg电子株式会社 使用中继站的切换方法
US20090156210A1 (en) * 2007-12-17 2009-06-18 Motorola, Inc. Method for facilitating a mobile station to perform a fast handoff
CN101478794A (zh) * 2008-01-03 2009-07-08 北京市万格数码通讯科技有限公司 Mpt-1327集群通信系统实现跨基站自动过网的方法
JP2010103966A (ja) * 2008-09-26 2010-05-06 Kyocera Corp 中継局、無線通信中継方法、無線通信端末、および無線通信システム
CN101605370A (zh) * 2009-07-16 2009-12-16 上海交通大学 基于系统容量的WiMAX网络切换方法

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CN102316545B (zh) 2016-02-10
CN102316545A (zh) 2012-01-11

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