WO2012083666A1 - Procédé et dispositif pour optimiser un équilibrage de charge - Google Patents

Procédé et dispositif pour optimiser un équilibrage de charge Download PDF

Info

Publication number
WO2012083666A1
WO2012083666A1 PCT/CN2011/076395 CN2011076395W WO2012083666A1 WO 2012083666 A1 WO2012083666 A1 WO 2012083666A1 CN 2011076395 W CN2011076395 W CN 2011076395W WO 2012083666 A1 WO2012083666 A1 WO 2012083666A1
Authority
WO
WIPO (PCT)
Prior art keywords
handover
cell
enb
event
threshold parameter
Prior art date
Application number
PCT/CN2011/076395
Other languages
English (en)
Chinese (zh)
Inventor
卫建国
朱永升
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 WO2012083666A1 publication Critical patent/WO2012083666A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0862—Load balancing or load distribution among access entities between base stations of same hierarchy level
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for optimizing load balancing in an LTE (Long Term Evolution) system.
  • LTE Long Term Evolution
  • Load balancing is a method to prevent excessive load on individual cells. It can distribute the load as evenly as possible among the geographically related cells, and reduce the load concentration in a certain cell in the area, thereby effectively improving the overall performance of the system. Improve the security, stability and capacity of the system to achieve an overall optimal state.
  • the process of load balancing generally consists of three phases: the measurement phase, the judgment phase, and the execution phase.
  • the measurement phase is mainly to measure the load situation in the cell, and obtain the load information of the neighboring area (including the coverage and the inclusion relationship) through the interface between the eNBs (base stations); the judgment stage is to determine whether the community needs to perform the load according to the measured value. Equilibrium, if load balancing needs to be performed, then the third phase operation is performed, otherwise the cell will repeat the first two phases to perform real-time monitoring on the system; in the execution phase, the high-load cell should select the appropriate UE (user equipment) to switch to The low-load cell makes the load of each cell in the area equivalent.
  • the measurement phase is to measure the resource status of the cell, such as the PRB (physical resource block) occupancy rate, and to exchange load information through the X2 port and the neighboring cell on the neighboring base station.
  • PRB physical resource block
  • the UE is selected to switch to the neighboring cell according to the service priority of the UE.
  • the cell with high load is generally because of its good signal quality and the number of users accessing it, and the high load is achieved.
  • the low-load cell in the same geographical location often The signal quality is worse than the high load cell.
  • ping-pong switching occurs.
  • the technical problem to be solved by the present invention proposes a method and apparatus for optimizing load balancing to avoid ping-pong switching.
  • the present invention provides a method for optimizing load balancing, including: when an eNB determines that a cell under its jurisdiction needs to perform load balancing, select all the cells in the cell.
  • the eNB selects one or more UEs to perform handover according to the measurement report reported by the UE and the load condition of the cell.
  • the step of selecting all UEs or part of UEs in the cell includes: selecting, by the eNB, part of UEs in the cell according to service priority.
  • the step of the eNB adjusting a threshold parameter of the handover event includes: the eNB reducing a threshold parameter of the handover event.
  • the step of sending the threshold parameter to the selected UE includes: sending, by the eNB, the adjusted threshold parameter to the selected UE by using a reconfiguration message.
  • the method further includes:
  • the eNB After the eNB sends the threshold parameter to the selected UE, if the UE that meets the handover condition is not selected, the selected UE is added, and a reconfiguration message is sent to the added UE, or the RRC is adjusted again.
  • the threshold parameter of the handover event is resent to the selected UE.
  • the handover event includes one or more of an A3 event, an A4 event, and an A5 event.
  • the threshold parameter adjusted by the eNB is an individual frequency offset of the serving cell or Hysteresis threshold.
  • the method further includes:
  • the eNB determines whether the cell under its jurisdiction needs to perform load balancing according to the load condition of the cell under its jurisdiction and the neighboring area load information carried in the neighboring resource status report information sent by the neighboring base station.
  • the present invention also provides an apparatus for optimizing load balancing, which is applied to an eNB, where the apparatus includes Number adjustment module and switching selection module, wherein
  • the parameter adjustment module is configured to: when it is determined that the cell managed by the eNB needs to perform load balancing, select all user equipments (UEs) or partial UEs in the cell, and adjust threshold parameters of the handover event, where the The threshold parameter is sent to the selected UE;
  • the handover selection module is configured to: select one or more UEs to perform handover according to the measurement report reported by the UE and the load condition of the cell.
  • the parameter adjustment module is configured to adjust a threshold parameter of the handover event in the following manner: lowering a threshold parameter of the handover event.
  • the parameter adjustment module is configured to send the threshold parameter to the selected UE in the following manner: sending the threshold parameter to the selected UE by using a reconfiguration message.
  • the switching selection module is further configured to notify the parameter adjustment module if the UE that meets the handover condition is not selected;
  • the parameter adjustment module is further configured to: if the notification sent by the handover selection module that does not select the UE that meets the handover condition is received, add the selected UE, and send a reconfiguration message to the added UE, or Adjusting the threshold parameter of the handover event, and resending the reconfiguration message to the selected UE.
  • the above solution can reduce the signal quality of the UE after handover to the target cell while reducing the load of the source cell, thereby avoiding the occurrence of ping-pong handover, and does not necessarily have to switch to the same coverage or the cell containing the relationship.
  • Embodiment 1 is a flow chart of load balancing according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a request and response message for acquiring a neighbor resource status in an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an air interface RRC connection reconfiguration process according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a UE transmitting a measurement report to an eNB according to an embodiment of the present invention.
  • the eNB adjusts the threshold parameter of the handover event in the load balancing process to select a more suitable UE to switch to the neighboring cell.
  • the UE selects all the UEs or part of the UEs in the cell, and adjusts the threshold parameter of the handover event, and sends the threshold parameter to the selected UE.
  • the eNB selects one or more UEs to perform handover according to the measurement report reported by the UE and the load condition of the cell.
  • the eNB determines whether the cell under its jurisdiction needs to perform load balancing according to the load condition of the cell under its jurisdiction and the neighboring area load information carried in the neighboring cell resource status report information sent by the neighboring base station.
  • the eNB may select a part of the UEs in the cell to send the threshold parameter according to the service priority.
  • the handover event may include an A3 event, an A4 event, an A5 event, and the like.
  • the quality of service (RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Received Quality)) of the neighboring cell is higher than the serving cell by an absolute threshold, triggering A3 event switching; when the quality of service of the neighboring cell is higher than an absolute threshold, Triggering A4 event switching; When the serving quality of the serving cell is lower than an absolute threshold of 1, the quality of service of the neighboring cell is higher than an absolute threshold of 2, triggering the A5 event switching.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • the eNB may reduce the threshold parameter of the A3/A4/A5 event, so that the condition of the handover is more easily satisfied (such as reducing the individual frequency offset or the hysteresis threshold of the serving cell of the A3 event), and the adjusted threshold parameter is passed under the reconfiguration message. Send to the selected UE.
  • the UE After receiving the reconfiguration message, the UE performs measurement. If the handover condition is met, the UE reports the measurement report to the eNB, and the eNB selects an appropriate UE to perform handover.
  • the eNB sends the threshold parameter to the selected UE
  • the selected UE may be added, and the reconfiguration message may be sent to the added UE, or may be adjusted again.
  • the threshold parameter of the handover event is used to resend the reconfiguration message to the selected UE.
  • Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that In the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. Embodiment 1
  • the embodiment of the present invention includes the following steps:
  • Step 101 The eNB determines whether the load balancing period is reached. If yes, the next step is performed.
  • the neighboring resource status report information and obtain the load information of the neighboring area;
  • the neighbor cell load information is acquired through the X2 port.
  • the eNB1 sends a resource status request message (RESOURCE STATUS REQUEST) to the base station eNB2 to which the neighboring cell belongs;
  • REQUEST resource status request message
  • eNB2 returns a resource status response message to eNB1 (RESOURECE STATUS RESPONSE)
  • the eNB2 sends a resource status update message (RESOURCE STATUS UPATE) (ie, neighbor cell resource status report information) to the eNB1, where the load information of the cell under the jurisdiction of the eNB2 is carried.
  • REOURCE STATUS UPATE ie, neighbor cell resource status report information
  • Step 103 determining whether the cell is the highest load cell, and if yes, performing the next step, if not, executing step 109;
  • Step 104 determining whether the load of the local cell exceeds the startup threshold of the load balancing, and if yes, performing the next step, otherwise, performing step 109;
  • the cell load is based on the PRB utilization of the GBR (Guest Guaranteed Bit Rate) service, the PRB utilization of the GBR service in the uplink, and the Non-Guaranteed Bit Rate (NGBR) service.
  • NGBR Non-Guaranteed Bit Rate
  • a load value calculated by the PRB utilization rate, the PRB utilization rate of the NGBR service, the total PRB usage rate of the cell downlink, the total PRB usage rate of the cell uplink, the downlink system bandwidth of the cell, and the uplink system bandwidth of the cell, If it is greater than a certain threshold (which can be set by the background), the load balancing process is performed.
  • Step 105 Reduce a threshold parameter of the handover event (referred to as a handover threshold); For example, for an A3 event,
  • ⁇ is the measured value of the neighboring area RSRP (reference signal received power) or RSRQ (reference signal received quality)
  • 0 is the adjacent area frequency offset
  • Ocn is the adjacent area frequency offset
  • Ms is the serving cell RSRP (reference signal received power) ) or RSRQ (reference signal reception quality) measured value
  • Ofs is the serving cell frequency offset
  • Ocs is the serving cell individual frequency offset
  • Hys is the hysteresis
  • Off is the deviation of the judgment condition.
  • the value of Ocs (individual frequency offset of the serving cell) or Hys (hysteresis threshold) can be lowered, so that the A3 event is easily satisfied, and switching occurs.
  • Step 106 Reconfigure the measurement task for all UEs in the cell (the measured neighboring cell is the neighboring cell with the lowest load)
  • the eNB sends a reconfiguration message (RRC Connection Reconfiguration, RRC Connection Reconfiguration message) to the UE, and carries the handover threshold.
  • a reconfiguration message RRC Connection Reconfiguration, RRC Connection Reconfiguration message
  • the UE returns a reconfiguration complete message to the eNB (RRC Connection Reconfiguration)
  • Step 107 After receiving the reconfiguration message, the UE performs measurement, and if the handover condition is met, the measurement report is measured on the eNB, as shown in FIG. 5;
  • Step 108 The eNB selects a UE to perform handover according to the measurement report reported by the UE and the load condition of the cell.
  • Step 109 Wait for the next load balancing execution period to arrive.
  • Steps 201 to 205 are the same as steps 101 to 105 of the first embodiment.
  • Step 206 The first embodiment is modified, and part of the UE is selected according to the service priority, and the measurement task is re-allocated to the selected UE.
  • Steps 207 to 209 are the same as steps 107 to 109 of the first embodiment.
  • Example 3 is an improvement of the second example.
  • Steps 301 to 305 are the same as steps 101 to 105 of the first embodiment.
  • Step 306 Select a partial UE according to the service priority, and re-assign the measurement task to the selected UE.
  • Step 307 If the measurement report is not received within the predetermined time, then expand the step 306 to select the UE according to the service priority. , or lower the handover threshold again, resend the measurement task, repeat step 307 until the UE that meets the handover condition is selected, and performs handover;
  • Step 308 waiting for the next load balancing execution period to arrive.
  • the switching threshold cannot be lowered too low to avoid unreasonable switching.
  • the degree of expanding the selected UE set or lowering the handover threshold may be appropriately larger to avoid step 307 looping multiple times.
  • the apparatus for optimizing load balancing is applied to an eNB, and includes a parameter adjustment module and a handover selection module, where
  • the parameter adjustment module is configured to: when it is determined that the cell under the control of the eNB needs to perform load balancing, select all UEs or part of the UEs in the cell, and adjust a threshold parameter of the handover event, and send the threshold parameter Give the selected UE;
  • the handover selection module is configured to: select one or more UEs to perform handover according to the measurement report reported by the UE and the load condition of the cell.
  • the parameter adjustment module is configured to: when adjusting a threshold parameter of the handover event, reduce a threshold parameter of the handover event.
  • the handover selection module is further configured to: if the parameter adjustment module sends the adjusted threshold parameter to the selected UE by using a reconfiguration message, if the UE that meets the handover condition is not selected, The parameter adjustment module; the parameter adjustment module is further configured to: If the module does not select the UE that meets the handover condition, the selected UE is added, and the reconfiguration message is sent to the added UE, or the threshold parameter of the handover event is adjusted again, and the reconfiguration message is resent to the selected UE. .
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions.
  • the form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.
  • the above-mentioned embodiments of the present invention can reduce the signal quality of the UE after handover to the target cell while reducing the load of the source cell, thereby avoiding the occurrence of ping-pong handover, and does not necessarily have to switch to the cell with the coverage or the inclusion relationship.

Landscapes

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

Abstract

La présente invention se rapporte à un procédé et à un dispositif adaptés pour optimiser un équilibrage de charge. Le procédé selon l'invention comprend les étapes suivantes : quand il est déterminé qu'un équilibrage de charge doit être accompli dans la cellule gérée par le eNB lui-même, le eNB sélectionne la totalité ou une partie seulement des UE dans ladite cellule, il ajuste le paramètre de seuil de l'événement de transfert intercellulaire et il transmet ledit paramètre de seuil aux UE sélectionnés ; ledit eNB sélectionne un UE ou plus pour le transfert intercellulaire sur la base du rapport de mesure rapporté par le ou les UE et de l'état de charge de ladite cellule.
PCT/CN2011/076395 2010-12-23 2011-06-27 Procédé et dispositif pour optimiser un équilibrage de charge WO2012083666A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010603376.3 2010-12-23
CN2010106033763A CN102572948A (zh) 2010-12-23 2010-12-23 一种优化负荷均衡的方法和装置

Publications (1)

Publication Number Publication Date
WO2012083666A1 true WO2012083666A1 (fr) 2012-06-28

Family

ID=46313096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/076395 WO2012083666A1 (fr) 2010-12-23 2011-06-27 Procédé et dispositif pour optimiser un équilibrage de charge

Country Status (2)

Country Link
CN (1) CN102572948A (fr)
WO (1) WO2012083666A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111556533A (zh) * 2020-05-15 2020-08-18 Oppo广东移动通信有限公司 一种小区驻留控制方法及相关设备

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103874142B (zh) * 2012-12-14 2017-09-15 上海贝尔股份有限公司 一种用于切换用户设备的方法和装置
CN106714239B (zh) * 2016-12-14 2022-02-22 北京拓明科技有限公司 一种lte网络负载自动均衡的方法和系统
CN108738076B (zh) * 2017-04-24 2021-09-21 上海中兴软件有限责任公司 一种负荷均衡执行门限调整的方法及装置
CN107371178B (zh) * 2017-08-28 2019-10-18 浪潮软件集团有限公司 高负荷小区优化方法和装置
CN113810966A (zh) * 2021-09-07 2021-12-17 维沃移动通信有限公司 小区切换方法及装置
CN114554551B (zh) * 2022-04-25 2022-09-02 广州世炬网络科技有限公司 基于prb利用率的基站负载均衡方法、装置及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101080082A (zh) * 2006-05-22 2007-11-28 上海贝尔阿尔卡特股份有限公司 联合检测多个小区负荷以进行切换控制的装置及其方法
WO2010016407A1 (fr) * 2008-08-08 2010-02-11 株式会社エヌ・ティ・ティ・ドコモ Station mobile, station de base radio, et procédé de communication mobile
CN101801030A (zh) * 2009-02-05 2010-08-11 大唐移动通信设备有限公司 实现负荷均衡的方法、装置及系统
CN101854665A (zh) * 2009-04-03 2010-10-06 大唐移动通信设备有限公司 一种lte系统的负荷控制方法、装置和系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101547475A (zh) * 2008-03-24 2009-09-30 华为技术有限公司 小区负载信息的交换方法和基站设备
CN101616436A (zh) * 2009-07-08 2009-12-30 西安电子科技大学 基于移动负载均衡机制下的用户选择切换方法
CN101626590B (zh) * 2009-08-04 2012-07-04 中国科学技术大学 一种避免移动负载均衡与移动鲁棒性优化功能冲突的方法
CN101754279B (zh) * 2009-12-11 2012-03-14 中国科学技术大学 一种保证实时类业务服务质量的负载均衡方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101080082A (zh) * 2006-05-22 2007-11-28 上海贝尔阿尔卡特股份有限公司 联合检测多个小区负荷以进行切换控制的装置及其方法
WO2010016407A1 (fr) * 2008-08-08 2010-02-11 株式会社エヌ・ティ・ティ・ドコモ Station mobile, station de base radio, et procédé de communication mobile
CN101801030A (zh) * 2009-02-05 2010-08-11 大唐移动通信设备有限公司 实现负荷均衡的方法、装置及系统
CN101854665A (zh) * 2009-04-03 2010-10-06 大唐移动通信设备有限公司 一种lte系统的负荷控制方法、装置和系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111556533A (zh) * 2020-05-15 2020-08-18 Oppo广东移动通信有限公司 一种小区驻留控制方法及相关设备
CN111556533B (zh) * 2020-05-15 2023-07-18 Oppo广东移动通信有限公司 一种小区驻留控制方法及相关设备

Also Published As

Publication number Publication date
CN102572948A (zh) 2012-07-11

Similar Documents

Publication Publication Date Title
US10595359B2 (en) Methods of managing terminal performed in base station and terminal
JP6765304B2 (ja) 通信システム
JP5282922B2 (ja) 負荷均衡化のための基地局間での資源状態情報のシグナリング
US10117128B2 (en) Signal transmission method and device
JP5283748B2 (ja) 制御装置、無線ネットワーク制御装置及び基地局装置並びに通信制御方法
US9386594B2 (en) Downlink transmission coordinated scheduling
US20220046747A1 (en) User Equipment, Radio Network Node and Methods Performed Therein for Handling Communication
EP2763461A1 (fr) Procédé de rétablissement de connexion de gestion des ressources radio, équipement utilisateur et enb
JP6106423B2 (ja) ユーザ端末、無線基地局、無線通信方法及び制御装置
WO2012083666A1 (fr) Procédé et dispositif pour optimiser un équilibrage de charge
KR20150085540A (ko) 셀 결합 바이어스 적용을 위한 자동화된 트리거들 및/또는 간섭 완화 기술들
WO2012013091A1 (fr) Procédé, appareil et système de transfert intercellulaire dans un système de communication prenant en charge une agrégation de porteuses
US8812010B2 (en) Radio communication system, radio base station, and communication control method
JP6910298B2 (ja) 基地局及び無線端末
WO2020153214A1 (fr) Procédé de commande de resélection de cellule, et équipement utilisateur
US9936432B2 (en) Method and a network node for improved resource utilization in a load balanced radio communication system
WO2014156261A1 (fr) Système de communication
WO2012062143A1 (fr) Procédé et dispositif pour l'équilibrage de charge résidente entre cellules
JP6471755B2 (ja) 無線基地局、移動局、無線通信システム、無線基地局の制御方法およびプログラム
GB2509948A (en) Configuring a plurality of cell individual offset (CIO) values for use in measurement reporting
WO2013107338A1 (fr) Procédé de gestion d'informations de différence de temps entre une microcellule et une macrocellule
WO2015014594A1 (fr) Appareils, procédés et programmes informatiques permettant à des émetteurs-récepteurs de stations de base de macrocellules et de petites cellules et à des émetteurs-récepteurs mobiles de fournir des informations de transfert
JP6564061B2 (ja) 通信方法及びデバイス
JPWO2016163268A1 (ja) ユーザ端末及び移動通信方法
WO2014089834A1 (fr) Procédé et appareil de gestion de regroupement d'ap

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11850065

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11850065

Country of ref document: EP

Kind code of ref document: A1