WO2015120698A1 - Procédé et dispositif permettant de réduire le nombre de libérations d'un ue et station de base - Google Patents

Procédé et dispositif permettant de réduire le nombre de libérations d'un ue et station de base Download PDF

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Publication number
WO2015120698A1
WO2015120698A1 PCT/CN2014/083588 CN2014083588W WO2015120698A1 WO 2015120698 A1 WO2015120698 A1 WO 2015120698A1 CN 2014083588 W CN2014083588 W CN 2014083588W WO 2015120698 A1 WO2015120698 A1 WO 2015120698A1
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WO
WIPO (PCT)
Prior art keywords
air interface
pdu
retransmissions
carrier
secondary carrier
Prior art date
Application number
PCT/CN2014/083588
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English (en)
Chinese (zh)
Inventor
李凤军
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
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Publication of WO2015120698A1 publication Critical patent/WO2015120698A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

Definitions

  • the present invention relates to the field of mobile communication systems, and more particularly to user equipment (UE, User in a carrier aggregation scenario in a Long Term Evolution Advanced (LTE-A) communication system. Equipment) is released.
  • UE user equipment
  • LTE-A Long Term Evolution Advanced
  • a base station can aggregate two or more component carriers (CCs) to provide services for the UE to support a larger Transmission bandwidth.
  • CCs component carriers
  • the UE can receive or transmit data on one or more CCs simultaneously according to its capabilities.
  • a Radio Resource Control (RRC) connection For the first time, only one serving cell, that is, a primary cell (PCell) is configured.
  • the carrier in this serving cell is called a Primary Component Carrier (PCC) and is responsible for RRC communication with the UE.
  • PCC Primary Component Carrier
  • SCell secondary cell
  • SCC auxiliary A component carrier
  • the PCell is always in an active state, and the UE only needs to perform downlink wireless link monitoring on the PCell.
  • Carrier aggregation is based on medium access control (MAC) aggregation.
  • MAC medium access control
  • HARQ hybrid automatic repeat request
  • RLC radio link control
  • AS Access Stratum
  • AS Access Stratum
  • multiple carriers provide radio resources for the same UE at the same time. Since carrier aggregation is implemented at the MAC layer, the RLC layer does not see which carrier is sent in the MAC layer. When the data is retransmitted to the maximum number of times in the RLC layer, The UE will be released by the RRC connection. If the UE is released by the RRC connection too many times and the probability is too large, the user experience will be affected.
  • the present invention is directed to an improvement in the above problems in a communication system, that is, a technical problem to be solved by the present invention is to provide a method, apparatus, and base station for reducing the number of UE releases, which method, device, or base station can effectively reduce UE
  • the number of RRC connection releases reduces the probability that the UE is released by the RRC connection.
  • the method for reducing the number of UE release times includes: when a protocol data unit (PDU) is the maximum number of retransmissions, and the primary carrier corresponding to the PDU And when the air interface resource and/or air interface quality condition of the secondary carrier satisfies a predetermined condition, the secondary carrier is deactivated, and the PDU is allowed to continue to be retransmitted.
  • PDU protocol data unit
  • the air interface resource and/or the air interface quality of the primary carrier and the secondary carrier meet the predetermined condition, including: the number of retransmissions of the PDU on the primary carrier and the number of retransmissions on the secondary carrier satisfy a predetermined condition; and Or the air interface quality coefficient of the primary carrier and the air interface quality coefficient of the secondary carrier satisfy a predetermined condition.
  • the number of retransmissions of the PDU on the primary carrier and the number of retransmissions on the secondary carrier satisfy a predetermined condition, including: a ratio of the number of retransmissions of the PDU on the primary carrier to the number of retransmissions on the secondary carrier is less than And the ratio of the air interface quality coefficient of the primary carrier to the air interface quality coefficient of the secondary carrier is greater than a predetermined threshold TH2.
  • the air interface quality coefficient is determined according to a BLOCK ERROR RATE (BLER) and a Channel Quality Indicator (CQI).
  • the PDU is allowed to continue to be retransmitted to allow the PDU to continue to be retransmitted N times, where N is a preset positive integer.
  • the embodiment of the present invention further provides an apparatus for reducing the number of times of release of the user equipment UE, including: a statistics module and an air interface resource processing module; and a detection module and/or an air interface quality detection module; the statistics module is configured to determine a protocol data unit.
  • the air interface resource detecting module is configured to detect the air interface resources of the primary carrier and the secondary carrier, and Notifying the processing module when the detection result satisfies the predetermined condition; and/or the air interface quality detecting module is configured to detect the air interface quality of the primary carrier and the secondary carrier, and notify the processing module when the detection result satisfies the predetermined condition; the processing module, setting To deactivate the secondary carrier, the notification statistics module is allowed to continue the retransmission of the PDU.
  • the air interface resource detecting module is specifically configured to determine whether the number of retransmissions of the PDU on the primary carrier and the number of retransmissions on the secondary carrier meet predetermined conditions, and notify the processing module when the predetermined condition is met;
  • the air interface quality detecting module Specifically, it is configured to detect a quality coefficient of the primary carrier and a quality coefficient of the secondary carrier corresponding to the PDU, and notify the processing module when the air interface quality coefficient of the primary carrier corresponding to the PDU and the air interface quality coefficient of the secondary carrier satisfy a predetermined condition.
  • the processing module when the ratio of the number of retransmissions of the PDU on the primary carrier to the number of retransmissions on the secondary carrier is less than a predetermined value TH1, the processing module is notified; when the air interface quality coefficient of the primary carrier corresponding to the PDU and the secondary When the ratio of the air interface quality coefficient of the carrier is greater than the predetermined value TH2, the processing module is notified.
  • the air interface quality coefficient is determined according to the air interface block error rate BLER and the channel quality indicator CQI.
  • the embodiment of the present invention further provides a base station, including the foregoing apparatus for reducing the number of times the UE of the user equipment is released.
  • the device, or the base station provided by the present invention When the maximum number of retransmissions of a protocol data unit (PDU) of the RLC layer is reached by using the method, the device, or the base station provided by the present invention, if the air interface resource and/or the air interface quality of the primary carrier and the secondary carrier are determined to be satisfied The predetermined condition; then the secondary carrier is deactivated and the PDU is allowed to continue to retransmit.
  • PDU protocol data unit
  • FIG. 1 is a flow chart showing the basic steps of a method for reducing the number of UEs released in the embodiment of the present invention
  • FIG. 2 is a schematic diagram of Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of a first implementation manner of the apparatus for reducing the number of UE releases according to the present invention
  • FIG. 6 is a schematic diagram of a second implementation manner of the apparatus for reducing the number of UE release times according to the present invention
  • a schematic diagram of a third implementation of the number of releases. 1 is a flowchart of a basic method for reducing the number of UE release times according to an embodiment of the present invention.
  • the basic steps of the method for reducing the number of UE release times in the embodiment of the present invention include: Step 101: The base station determines that a PDU reaches the maximum. Step 102: The base station determines that the air interface resource and/or the air interface quality of the primary carrier and the secondary carrier corresponding to the PDU meet the predetermined condition; Step 103: The base station deactivates the secondary carrier, and allows the PDU to continue to retransmit.
  • the air interface resources of the primary carrier and the secondary carrier satisfy the predetermined condition, including the air interface bandwidth of the primary carrier is smaller, and the air interface resource of the secondary carrier is more abundant; the air interface quality of the primary carrier and the secondary carrier meets predetermined conditions, including the quality of the primary carrier air interface is good.
  • the secondary carrier air interface is of poor quality. Deactivating the secondary carrier, allowing the PDU to continue to retransmit, instead of directly following the RRC connection release procedure, can ensure that the primary carrier can continue to serve the UE, that is, the UE is still in the RRC connected state, reducing the dropped call rate of the UE, and improving user experience. If the PDU still reaches the maximum number of retransmissions when there is only the primary carrier service, the UE is released.
  • the number of the primary and secondary carrier air interface resources may be determined according to the air interface scheduling of the primary carrier and the secondary carrier, that is, the number of retransmissions of the PDU on the primary carrier and the secondary carrier; More lenient, on the contrary, it means that the air interface resources are relatively tight.
  • the air interface quality of the primary carrier and the secondary carrier can be determined by the air interface block error rate BLER, CQI and other indicators. The specific implementation method is explained in detail in the following specific embodiments.
  • Embodiment 1 FIG. 2 is a schematic diagram of Embodiment 1 of the present invention. As shown in FIG.
  • the method for reducing the number of UE release times in this embodiment includes the following steps: Step 201: The base station RLC layer records the number of retransmissions of each PDU on its primary carrier and all secondary carriers; Step 202: The RLC layer determines Whether the PDU reaches the maximum number of retransmissions. If the PDU reaches the maximum number of retransmissions (set PDU1 to reach the maximum number of retransmissions), go to step 203; otherwise, the current flow ends; Step 203: The RLC layer determines that PDU1 is on its primary carrier.
  • Step 204 The RLC layer determines whether Rx is less than a predetermined threshold TH1. If yes, indicating that the air interface resource of the primary carrier is relatively abundant, and the primary carrier can continue to provide services for the UE, notify the MAC layer and jump to step 205.
  • Step 207 The TH1 may be scheduled according to the requirements of the network to release the UE.
  • ⁇ 1 1/5
  • Step 205 The base station MAC layer initiates a secondary carrier deactivation process to deactivate the secondary carrier. X, and notify the RLC layer after completion
  • Step 206 The RLC layer allows PDU1 to continue retransmission, if the retransmission is successful, the current process ends; if it continues to retransmit after N times, then go to step 207;
  • the number of times that the default is allowed to continue retransmission is a positive integer.
  • the RNLC can report the error indication according to the specific networking environment, and the RNLC receives the error indication after receiving the error indication.
  • FIG. 3 is a schematic diagram of Embodiment 2 of the present invention.
  • Step 303 The RLC layer determines whether one PDU reaches the maximum number of retransmissions, and if one PDU reaches the maximum number of retransmissions ( If the PDU2 reaches the maximum number of retransmissions, the MAC layer is notified and the process proceeds to step 304; otherwise, the current process is terminated; Step 304: The base station MAC layer determines the air interface quality coefficient of the primary carrier corresponding to the PDU2 and the air interface quality of each secondary carrier.
  • Quality factor Step 305 Determine whether Qx is greater than a predetermined threshold TH2. If yes, it indicates that the air interface quality of the primary carrier is good, and the quality of the secondary carrier X air interface is poor. The primary carrier may continue to provide services for the UE, and the process proceeds to step 306. If the Qx is less than the predetermined threshold TH2, the process proceeds to step 308.
  • FIG. 4 is a schematic diagram of Embodiment 3 of the present invention. As shown in FIG.
  • Step 406 The MAC layer determines a ratio of an air interface quality coefficient of the primary carrier corresponding to the PDU3 and a quality coefficient of each secondary carrier air interface.
  • Step 409 The RLC layer allows the PDU3 to continue to retransmit. If the retransmission is successful, the current process ends; if the retransmission continues after the N times, the process proceeds to step 410; where N is the preset permission to continue to be heavy.
  • the RLC layer allows the PDU to continue retransmission by an error indication message that does not report the PDU to the control plane to the maximum number of retransmissions. 5, FIG. 6, and FIG.
  • the device includes a statistics module, an air interface resource detection module, and a processing module.
  • the working mode is: the statistic module determines whether the protocol data unit PDU reaches the maximum number of retransmissions, and notifies the air interface resource detecting module when determining that a PDU (set to PDU4) reaches the maximum number of retransmissions; the air interface resource detecting module detects the PDU4 corresponding to the PDU4.
  • the air interface resource of the primary carrier and the secondary carrier, and the processing module is notified when the detection result satisfies the predetermined condition; because the amount of the primary carrier and the secondary carrier air interface resource can be determined according to the scheduling frequency, the air interface resource detecting module can specifically determine the PDU4 Whether the number of retransmissions on the primary carrier and the number of retransmissions on the secondary carrier satisfy a predetermined condition, and notify the processing module when satisfied; the processing module receives the air interface resource After the notification sent by the detection module satisfies the predetermined condition, the secondary carrier is deactivated, and the statistic module is notified to allow the PDU to continue retransmission.
  • the processing module is notified; the number of times the PDU is allowed to continue to be retransmitted may be based on the frequency of releasing the UE and
  • the requirements for data transmission delay are preset.
  • the second implementation manner is shown in FIG. 6.
  • the device includes a statistics module, an air interface quality detection module, and a processing module.
  • the working mode is as follows:
  • the statistics module determines whether the protocol data unit PDU reaches the maximum number of retransmissions, and notifies the air interface resource detecting module when determining that a certain PDU (set to PDU5) reaches the maximum number of retransmissions;
  • the air interface quality detecting module detects the corresponding PDU4 The air interface quality of the primary carrier and the secondary carrier, and notifying the processing module when the detection result satisfies the predetermined condition; specifically, detecting that the ratio of the air interface quality coefficient on the primary carrier corresponding to the PDU 5 and the air interface quality coefficient on the secondary carrier is satisfied Notifying the processing module when the condition is predetermined; after receiving the notification that the air interface quality detecting module sends the predetermined condition, the processing module deactivates the secondary carrier, and notifies the statistics module to allow the PDU to continue to retransmit.
  • the processing module is notified, wherein the air interface quality coefficient may be determined according to the BLER and the CQI, and the specific air interface is determined.
  • the quality coefficient is equal to the ratio of CQI to BLER, that is, the air interface quality coefficient is ⁇ :01/61 ⁇ 1 .
  • the number of times that the PDU is allowed to continue retransmission can be preset, and TH2 can release the frequency to the UE according to the network construction.
  • the third implementation manner is shown in FIG. 7.
  • the device includes a statistics module, an air interface resource detection module, an air interface quality detection module, and a processing module.
  • the difference between the first implementation and the second implementation manner is that the processing module receives the notification that the air interface resource detection module sends the predetermined condition, and/or the air interface quality detection module sends the satisfaction request.
  • the secondary carrier is deactivated, and the statistics module is notified to allow the PDU to continue to retransmit.
  • the statistic module and the air interface resource detecting module are located at the RLC layer of the base station, and the air interface quality detecting module and the processing module are located at the MAC layer of the base station.
  • the base station provided by the embodiment of the present invention includes the apparatus for reducing the number of UE release times as described in any one of the foregoing three implementation manners.
  • the maximum number of retransmissions of the PDU is: The number of times that the same PDU of the RLC layer is repeatedly transmitted on the air interface reaches the maximum number of retransmissions, where the maximum number of retransmissions is configured by the base station during the UE access process.
  • the RLC does not receive the acknowledgement of the packet for a certain period of time after receiving the PDU or receives the NACK (Nacknowledge, no acknowledgement) of the packet, and then retransmits the packet. It is to be understood that various changes and substitutions may be made in accordance with the description of the invention and the embodiments of the invention. range.

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

Abstract

L'invention concerne un procédé et un dispositif permettant de réduire le nombre de libérations d'un UE, ainsi qu'une station de base. D'après le procédé, lorsqu'une PDU atteint le nombre maximum de retransmissions et lorsque des ressources d'interface radio et/ou des conditions de qualité d'interface radio d'une porteuse principale et d'une porteuse auxiliaire correspondant à la PDU satisfont une condition prédéterminée, la porteuse auxiliaire est désactivée et la PDU peut être retransmise en continu. La solution technique d'après la présente invention réduit le nombre de libérations d'un UE par une connexion RRC et la probabilité qu'un UE soit libéré par la connexion RRC, ce qui améliore les performances d'un système de communication et l'expérience de l'utilisateur.
PCT/CN2014/083588 2014-02-17 2014-08-01 Procédé et dispositif permettant de réduire le nombre de libérations d'un ue et station de base WO2015120698A1 (fr)

Applications Claiming Priority (2)

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CN201410053548.2 2014-02-17
CN201410053548.2A CN104853372B (zh) 2014-02-17 2014-02-17 一种减少ue释放次数的方法、装置及基站

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WO2017045149A1 (fr) * 2015-09-16 2017-03-23 华为技术有限公司 Procédé et appareil de libération de connexion à commande de ressource radio (rrc)
CN108605269B (zh) * 2017-01-09 2021-05-18 华为技术有限公司 一种会话管理方法及装置
CN109756309B (zh) * 2017-11-01 2022-05-13 中兴通讯股份有限公司 去激活辅成员载波的方法、装置及介质
CN110351895B (zh) * 2018-04-04 2021-11-09 华为技术有限公司 通信方法和装置

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CN101873577B (zh) * 2009-04-27 2017-03-22 电信科学技术研究院 通知ue变更成员载波监听的方法、系统及装置
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CN102215553A (zh) * 2010-04-12 2011-10-12 中兴通讯股份有限公司 载波去激活的处理方法及用户设备
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CN102223730A (zh) * 2010-04-14 2011-10-19 电信科学技术研究院 一种辅载波随机接入失败的处理方法及装置
CN102377547A (zh) * 2010-08-10 2012-03-14 中兴通讯股份有限公司 一种多载波系统中数据重传方法及系统

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