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WO2010121438A1 - Méthode, système et équipement utilisateur de resélection de cellule - Google Patents

Méthode, système et équipement utilisateur de resélection de cellule Download PDF

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Publication number
WO2010121438A1
WO2010121438A1 PCT/CN2009/071464 CN2009071464W WO2010121438A1 WO 2010121438 A1 WO2010121438 A1 WO 2010121438A1 CN 2009071464 W CN2009071464 W CN 2009071464W WO 2010121438 A1 WO2010121438 A1 WO 2010121438A1
Authority
WO
WIPO (PCT)
Prior art keywords
user equipment
cell
cell reselection
information
priority
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/CN2009/071464
Other languages
English (en)
Chinese (zh)
Inventor
黄英
牛卫国
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 CN2009800001478A priority Critical patent/CN101971524A/zh
Priority to PCT/CN2009/071464 priority patent/WO2010121438A1/fr
Publication of WO2010121438A1 publication Critical patent/WO2010121438A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method, system, and user equipment for cell reselection.
  • the different system cell or the inter-frequency cell may cover the network.
  • FIG. 1 a schematic diagram of the same coverage network in the prior art, such as UMTS (Universal Mobile Telecommunications System) cell A and LTE (Long Term Evolution) cell A, covers a common area. .
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • the system sends a public priority through a system broadcast message, or uses a radio resource control release message when the UE is in an active state ( For example, the Radio Resource Control (RRC) Release message delivers a dedicated priority, and the UE transits to the idle state after receiving the RRC release message.
  • RRC Radio Resource Control
  • the prior art UE cannot use two priorities at the same time, and if a dedicated priority is received, the public priority is ignored. However, this dedicated priority is limited.
  • the PLMN Public Land Mobile Network
  • the UE For the UE in the active state, since there is no dedicated priority, when the RLF fault occurs, the UE performs cell reselection according to the radio signal and the common priority, and as a result, many UEs may simultaneously select a new cell. This will bring a load impact to the new community. For the UE in the idle state, many of the public priorities have no dedicated priority, so that the UE will also select the same new cell with a high probability when re-entering the network, which will bring a load impact to the new cell. Summary of the invention
  • An embodiment of the present invention provides a cell reselection method, where the method includes: acquiring, by a user equipment in an activated state, a cell reselection priority information of the user equipment and saving the cell; At the time, cell reselection is performed according to the cell priority reselection priority information.
  • an embodiment of the present invention provides a user equipment, where the user equipment includes: an information acquiring unit, configured to acquire, when the user equipment is in an active state, the cell reselection priority information of the user equipment, and save the information;
  • the cell reselection unit is configured to perform cell reselection according to the cell reselection dedicated priority information when a cell failure occurs in the cell accessed by the user equipment.
  • an embodiment of the present invention further provides a cell reselection system, where the cell reselection system includes at least an access network device and a user equipment as described above.
  • the user equipment in the activated state acquires the cell reselection priority information of the user equipment and saves; when the cell accessed by the user equipment fails, the cell priority is reselected according to the cell.
  • the information is used for cell reselection.
  • FIG. 1 is a schematic diagram of a same covering network in the prior art
  • FIG. 2 is a flowchart of a method for cell reselection according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of another method for cell reselection according to an embodiment of the present invention
  • 5 is a schematic diagram of a mapping relationship between an application instance index value and a cell reselection priority priority according to the present invention
  • FIG. 6 is a flowchart of still another method for cell reselection according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of still another method for cell reselection according to an embodiment of the present invention.
  • FIG. 2 it is a flowchart of a method for cell reselection according to an embodiment of the present invention, where the method includes:
  • Step 201 The user equipment in the activated state acquires the cell reselection priority information of the user equipment and saves the information.
  • Step 202 When a cell fault occurs in the cell accessed by the user equipment, perform cell reselection according to the specific priority information of the cell reselection.
  • the foregoing method embodiment of the present invention acquires the cell reselection priority information of the user equipment by using the user equipment in the activated state, and saves; when the cell accessed by the user equipment is faulty, the cell is reselected according to the cell priority reselection priority information. Reselection, when the cell accessed by the user equipment in the activated state suddenly has a cell failure, the user equipment is selected to a different new cell, thereby avoiding a load impact on the same new cell.
  • FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present invention, where the user equipment can implement the cell reselection method provided by the foregoing embodiment.
  • User equipment 30 includes:
  • the information obtaining unit 301 is configured to acquire the cell reselection priority information of the user equipment and save the user equipment 30 when the user equipment 30 is in an active state, and the cell reselection unit 302 is configured to be accessed by the user equipment in the activated state.
  • cell reselection is performed according to the cell priority reselection priority information.
  • the foregoing information acquiring unit 301 may further be used by the user equipment 30 in the activated state to receive the cell reselection dedicated priority information by using the system broadcast, or further used to receive the cell weight received by the system broadcast when the user equipment is in an idle state.
  • the cell reselection priority information includes a mapping relationship between the index value and the cell reselection priority.
  • the cell reselection unit 302 calculates an index value of the user equipment according to the international mobile subscriber identity of the user equipment, and selects the index.
  • the cell corresponding to the value reselects the dedicated priority information, and performs cell reselection according to the cell priority reselection priority information.
  • the information acquiring unit 301 may be further configured to: when the user equipment is in an active state, receive a cell reselection priority of the user equipment by using a radio resource control message.
  • the information acquiring unit 301 may be further configured to reserve the cell reselection priority information delivered by the RRC release message when the user equipment enters the activation state.
  • the information acquiring unit 301 may be configured to: receive, by using the handover message, the cell reselection priority information that is sent by the source cell, the target cell access information that the user equipment is to access, and the resource reservation situation;
  • the reselection unit 302 performs cell reselection according to the cell priority reselection priority information and the target cell access information and resource reservation conditions to be accessed by the user equipment.
  • the embodiment of the present invention further provides a cell reselection system, where the cell reselection system includes at least an access network device and the foregoing user equipment.
  • the access network device is an eNB.
  • the access network device is an RNC (Radio Network Controller).
  • the access network device may be configured to determine, according to the adjacency relationship priority, and/or the priority of the user equipment, and/or whether the same coverage is prioritized, the user equipment that needs to send the cell reselection priority priority.
  • the access network device may be further configured to use, according to the service distribution information of the user equipment, the load information of the user equipment cell, the user information of different types of the user equipment, the service information of the user equipment, the user equipment network support capability information, and the foregoing User equipment
  • One or more of the distribution information in different networks obtains the cell reselection-specific priority information.
  • the user equipment in the activated state can select different new cells when the connected cell suddenly experiences a cell failure, thereby avoiding a load impact on the same new cell.
  • FIG. 4 it is an embodiment of a method for reselecting another cell according to an embodiment of the present invention.
  • This embodiment can be implemented by the above user equipment and system.
  • the user equipment acquires the cell reselection dedicated priority information through the system broadcast, and thereby obtains its own cell reselection dedicated priority information.
  • the LTE system is used as an example, and the user equipment obtains the cell reselection priority information that is sent by the eNB (evolved NodeB, evolved base station) through the system broadcast.
  • eNB evolved NodeB, evolved base station
  • Step 401 The active user equipment receives the cell reselection priority information delivered by the evolved base station through the system broadcast.
  • the cell reselection dedicated priority information is a correspondence between an index value and a cell reselection dedicated priority.
  • the index value corresponds to a cell reselection priority relationship of different cells, for example, a mapping relationship between the index value and the cell reselection priority priority shown in FIG. 5.
  • Step 402 The user equipment obtains its own cell reselection priority by using the index value and the cell reselection priority priority according to its own index value.
  • the user equipment may calculate its own index value according to an algorithm specified by the system.
  • the UE may calculate the index value according to an IMSI (International Mobile Subscriber Identity) mod, and the remainder is Index value.
  • IMSI International Mobile Subscriber Identity
  • the system may set an algorithm for calculating an index value according to the situation.
  • Step 403. When a cell failure occurs in the cell accessed by the user equipment, the user equipment performs cell reselection according to the cell reselection priority of the user equipment obtained in the foregoing step 402.
  • UE1 calculates that its own index value is 1, when UE1 generates a cell.
  • the preferred cell is the cell of the LTE frequency point fl of the system.
  • UE2 calculates that its own index value is 2.
  • the preferred cell is a UMTS cell.
  • the embodiment of the present invention further provides another method for cell reselection.
  • the method for the user equipment in the activated state to obtain the cell reselection priority is: retaining the cell of the user equipment that is received by the user equipment through the system broadcast in the idle state.
  • Re-select dedicated priority information that is, when the user equipment enters the active state from the idle state, the cell reselection priority information of the user equipment that is received by the user equipment through the system broadcast in the idle state is not deleted.
  • the cell reselection dedicated priority information is a correspondence between an index value and a cell reselection dedicated priority.
  • the method for obtaining the cell reselection priority of the user equipment by using the index value and performing cell reselection is the same as the method and the example in steps 402 and 403, and details are not described herein again.
  • the new cell reselection dedicated priority is used to update instead of the old cell reselection priority.
  • the embodiment of the present invention solves the problem that when a cell in an active state suddenly experiences a cell failure, a large number of UEs in the faulty cell simultaneously select the same new cell to bring a load impact to the new cell, and the cell broadcast by the system is dedicated. Reselecting the priority information enables the UE to effectively and reasonably distribute to different new cells to ensure the success rate of subsequent access.
  • FIG. 6 is a schematic diagram of another method for cell reselection according to an embodiment of the present invention.
  • This embodiment can be implemented by the above user equipment and system.
  • the user equipment in the active state receives the cell reselection priority information through the radio resource control message.
  • the LTE system is used as an example.
  • the user equipment in the active state receives the cell reselection priority information delivered by the eNB through the RRC message, that is, the eNB notifies the UE of the cell reselection priority.
  • the eNB informs the UE of the cell reselection dedicated priority through an RRC reconfiguration message or other RRC message.
  • the method for cell reselection provided in this embodiment includes: Step 601.
  • the UE in the active state receives the cell reselection priority of the UE delivered by the eNB through the RRC message and saves it.
  • the foregoing radio resource control message may include: A resource control reconfiguration message, or a radio resource control release message, or a radio bearer setup message, or a radio resource control dedicated message or other RRC message.
  • Step 602. When the cell has the cell failure, the UE performs cell reselection according to the cell reselection priority of the UE.
  • the RNC corresponds to the foregoing eNB
  • the IU port corresponds to the S1 port
  • the message of the IU port may have a RAB ASSIGNMENT REQUEST
  • other RRC messages may include a radio bearer setup message (for example, a Radio Bearer). Setup message), or RRC dedicated message or other newly constructed RRC message that can achieve the same function.
  • the eNB obtains an initial context request setup message (for example, an intial context request setup message) sent by the MME (Mobility Management Entity) to obtain the UE.
  • an initial context request setup message for example, an intial context request setup message
  • MME Mobility Management Entity
  • the eNB obtains the information, the neighboring cell characteristics are comprehensively considered, and the cell reselection priority of the UE is obtained, and then sent to the UE by using a radio resource control message.
  • the eNB may further determine, according to the adjacency relationship priority, the priority of the UE, and whether the same coverage is prioritized, which UEs need to send the cell reselection priority of the UE; or each time the handover is performed. At the time, it is sent to the UE along with the handover command.
  • the method for determining whether the same coverage is performed includes: determining, according to a proportional relationship between a user equipment that can measure the second cell in the first cell and a user equipment that can measure the first cell in the second cell, determining the first cell And a coverage relationship of the second cell.
  • the radio resource management algorithm it is determined whether the neighboring cell is covered, and whether the coverage is the same according to the proportional relationship of the coverage area. For example: 1) The source cell triggers all UEs in the cell to measure the neighboring cell. If all the UEs can detect a neighboring cell multiple times, it is determined that the neighboring cell is within the coverage of the cell. 2) If the neighboring cell performs the above 1) measurement on the local cell, the result is that all the UEs can detect the local cell multiple times, and 1) can determine that the two cells are the same coverage; if the neighboring cell measures only the local cell, If the UE can detect the coverage, the local cell and the neighboring cell are the size coverage.
  • the neighboring cell can measure that the UE ratio of the cell is not much different, the ratio of the coverage area of the two cells can be determined. relationship. 3) If only some UEs in the source cell detect the neighboring cell, and only some UEs in the neighboring cell can detect the cell, the two cells are partially overlapped; if the result of multiple measurements is detected, the UE in the neighboring cell is detected. If the ratios of the two cells are not much different, the ratio of the overlapping regions of the two cells to the neighboring cells may be determined; further, the proportional relationship between the coverage areas of the two cells may be determined.
  • the network can also randomly select a part of the UE to perform the above measurements 1 to 3, and measure multiple times (more than the above method), and similar results can be determined similarly to the above 1) to 3).
  • the embodiments of the present invention are not limited thereto.
  • the embodiment of the present invention solves the problem that when a cell in activating state suddenly experiences a cell failure, a large number of UEs in the faulty cell simultaneously select the same new cell, causing a load impact on the new cell, when the user equipment is in an active state,
  • the radio resource control message is used to receive the cell reselection priority information that is sent by the eNodeB, so that the UE can be effectively and appropriately distributed to different new cells to ensure the success rate of subsequent access.
  • the embodiment of the invention further provides an embodiment of a method for cell reselection.
  • This embodiment can be implemented by the above user equipment and system.
  • the cell reselection method provided in this embodiment keeps the cell reselection priority of the UE in the idle state when the UE enters the active state, that is, saves in the active state and continues to use the cell reselection priority of the UE. And when the RLF occurs in the UE, cell reselection is performed according to the cell reselection dedicated priority.
  • the cell reselection priority priority of the UE that is sent by the UE in the idle state is the cell reselection priority of the UE that is sent when the RRC release is released. That is, in this embodiment, the method for the UE to obtain the cell reselection priority priority when the UE enters the active state is to reserve the cell reselection priority information delivered by the RRC release message.
  • the embodiment of the present invention solves the problem that when a UE suddenly occurs RLF, a large number of UEs in the faulty cell simultaneously select the same new cell to bring a load impact to the new cell, and use the radio resource control release message to deliver the cell weight. Selecting a dedicated priority enables the UE to effectively and reasonably spread to different The new cell guarantees the success rate of subsequent access.
  • the service distribution strategy for example: prioritize different services in different systems to generate service priorities of different cells.
  • the cell reselection priority of the system is set to the lowest.
  • the UEs are distributed in different networks according to a certain proportion, and the proportional relationship may be determined according to an operator's policy or according to the capacity of the network. For example, if the operator wants LTE, UMTS, and GSM to bear 20%, 40%, and 40% of the load, then the ratio is 2: 4: 4.
  • the cell reselection priority of the embodiment of the present invention may be calculated according to one or more of the foregoing methods 1) to 6), but the embodiment of the present invention is not limited thereto.
  • FIG. 7 an embodiment of a method for reselecting another cell according to an embodiment of the present invention is shown.
  • This embodiment can be implemented by the above user equipment and system.
  • the user equipment is to perform handover, if the source cell sends a handover request to multiple target cells, after receiving the target cell handover response, the source cell is based on the source cell.
  • the previous handover statistical success rate or radio resource management algorithm sets a cell reselection priority for each target cell.
  • the method specifically includes:
  • Step 701 The user equipment receives, by using a handover message, a cell reselection priority priority corresponding to a plurality of target cells delivered by the source cell, and access information and a resource reservation situation of the target cell. Specifically, the user equipment may be notified by the handover message of a plurality of different priority switching containers, where the container includes the access information of the target cell and the resource reservation, and the user equipment saves after receiving the information;
  • Step 702 The user equipment reselects the dedicated priority information according to the foregoing cell, and performs cell reselection according to the access information of the target cell to be accessed by the user equipment and the resource reservation situation.
  • the embodiment of the present invention solves the problem that a large number of UEs simultaneously select the same new cell and bring a load impact to the new cell, and the UE is effectively and reasonably dispersed to different new ones by using the cell reselection dedicated priority sent by the source cell.
  • the cell guarantees the success rate of subsequent access.
  • the storage medium includes all or part of the above steps, such as a ROM/RAM, a magnetic disk, an optical disk, and the like.

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

Abstract

L'invention porte sur une méthode, un système et un équipement utilisateur de resélection de cellule. La méthode comporte les étapes suivantes: (201) acquisition et sauvegarde par l'équipement utilisateur à l'état actif d'une information octroyant la priorité à la resélection de cellule; (202) en cas d'échec de l'accès à la cellule par l'équipement utilisateur, exécution de la resélection de cellule conformément à ladite information. En cas de défaut d'accès soudain à la cellule par l'équipement utilisateur, il sélectionne une nouvelle cellule différente pour éviter un choc de charge sur une même cellule.
PCT/CN2009/071464 2009-04-24 2009-04-24 Méthode, système et équipement utilisateur de resélection de cellule Ceased WO2010121438A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009800001478A CN101971524A (zh) 2009-04-24 2009-04-24 小区重选的方法、系统及用户设备
PCT/CN2009/071464 WO2010121438A1 (fr) 2009-04-24 2009-04-24 Méthode, système et équipement utilisateur de resélection de cellule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2009/071464 WO2010121438A1 (fr) 2009-04-24 2009-04-24 Méthode, système et équipement utilisateur de resélection de cellule

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WO2010121438A1 true WO2010121438A1 (fr) 2010-10-28

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PCT/CN2009/071464 Ceased WO2010121438A1 (fr) 2009-04-24 2009-04-24 Méthode, système et équipement utilisateur de resélection de cellule

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WO (1) WO2010121438A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103369615A (zh) * 2012-04-06 2013-10-23 中兴通讯股份有限公司 一种多模终端信息处理方法及多模终端及接入网设备
US11792712B2 (en) 2021-12-23 2023-10-17 T-Mobile Usa, Inc. Cell reselection priority assignment based on performance triggers

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CN1836387A (zh) * 2003-08-22 2006-09-20 三星电子株式会社 用于在支持多媒体广播/组播业务的移动通信系统中接收分组数据的小区重选方法
CN1852564A (zh) * 2005-08-12 2006-10-25 上海华为技术有限公司 用于用户终端接入的网络侧对象出现故障时的处理方法
WO2009045078A2 (fr) * 2007-10-05 2009-04-09 Lg Electronics Inc. Procédé de réalisation de resélection de cellules dans un système de communication sans fil

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KR100672471B1 (ko) * 2005-03-07 2007-01-24 엘지전자 주식회사 통신 시스템에서의 셀 선택 방법
CN100455112C (zh) * 2005-07-07 2009-01-21 华为技术有限公司 一种基于用户优先级的小区重选方法

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CN1836387A (zh) * 2003-08-22 2006-09-20 三星电子株式会社 用于在支持多媒体广播/组播业务的移动通信系统中接收分组数据的小区重选方法
CN1852564A (zh) * 2005-08-12 2006-10-25 上海华为技术有限公司 用于用户终端接入的网络侧对象出现故障时的处理方法
WO2009045078A2 (fr) * 2007-10-05 2009-04-09 Lg Electronics Inc. Procédé de réalisation de resélection de cellules dans un système de communication sans fil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103369615A (zh) * 2012-04-06 2013-10-23 中兴通讯股份有限公司 一种多模终端信息处理方法及多模终端及接入网设备
US11792712B2 (en) 2021-12-23 2023-10-17 T-Mobile Usa, Inc. Cell reselection priority assignment based on performance triggers
US12219421B2 (en) 2021-12-23 2025-02-04 T-Mobile Usa, Inc. Cell reselection priority assignment based on performance triggers

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