WO2014181181A1 - Method for supporting dual connectivity - Google Patents

Method for supporting dual connectivity Download PDF

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Publication number
WO2014181181A1
WO2014181181A1 PCT/IB2014/001061 IB2014001061W WO2014181181A1 WO 2014181181 A1 WO2014181181 A1 WO 2014181181A1 IB 2014001061 W IB2014001061 W IB 2014001061W WO 2014181181 A1 WO2014181181 A1 WO 2014181181A1
Authority
WO
WIPO (PCT)
Prior art keywords
enb
user equipment
master
master enb
scheduling
Prior art date
Application number
PCT/IB2014/001061
Other languages
English (en)
French (fr)
Inventor
Tao Yang
Seau Sian Lim
Original Assignee
Alcatel Lucent
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51298906&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2014181181(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from CN201310172970.5A external-priority patent/CN104144511B/zh
Application filed by Alcatel Lucent filed Critical Alcatel Lucent
Priority to EP14748269.9A priority Critical patent/EP2995036A1/en
Priority to JP2016512440A priority patent/JP2016518793A/ja
Priority to KR1020157034748A priority patent/KR101698715B1/ko
Publication of WO2014181181A1 publication Critical patent/WO2014181181A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands

Definitions

  • the master eNB is not aware of the load situation of the secondary eNB, and thus cannot perform the scheduling operation efficiently;
  • the scheduling information may be exchanged between the master eNB and the secondary eNB or received by the UE, such that the subsequent scheduling optimization is possible.
  • the master eNB using the method according to the present invention may obtain the required scheduling information in time, such that the master eNB may realize a scheduling optimization and thus the communication performance of the whole wireless communication network is improved.
  • the user equipment only sends the scheduling related scheduling information to the master eNB when the master eNB receives the scheduling related scheduling information from the user equipment.
  • the scheduling may be controlled by the master eNB .
  • the user equipment for the uplink BSR or the uplink PHR, the user equipment only selects an active uplink carrier component controlled by the master eNB to send the scheduling information. In such a manner, it is ensured that the master eNB may receive the uplink BSR and uplink PHR information.
  • the user equipment selects a small cell to send the scheduling information according to a predetermined rule.
  • the predetermined rule may be that the scheduling information is sent by the small cell managed by the master eNB which has the smallest small cell index.
  • the predetermined rule may be any other proper rules.
  • the first indication message indicates that the master eNB has added the small cell for the user equipment; and - sending a second confirmation message to the master eNB in response to the first indication message.
  • the master eNB may schedule well even if the master eNB is not aware of the load situation of the secondary eNB. Therefore, it is not needed to transmit the load situation of the secondary eNB to the master eNB in this case.
  • the master eNB if the load situation of the secondary eNB is high for example higher than the first threshold, then the master eNB must consider the load situation of the secondary eNB, at this time the load situation of the secondary eNB is needed to be transmitted to the master eNB.
  • the second indication information includes user equipment identifier and cell index.
  • Fig. l illustrates the schematic diagram 100 of the network architecture in the prior art
  • control signaling indicates to add a small cell for the user equipment
  • the master eNB receives the scheduling related scheduling information from the secondary eNB or sends the scheduling related scheduling information to the secondary eNB via X2 signaling when the master eNB receives the scheduling related scheduling information from the secondary eNB or sends the scheduling related scheduling information to the secondary eNB.
  • the secondary eNB may forward the uplink BSR information, the downlink CSI information received by the secondary eNB to the master eNB without any delay, and thus the master eNB may obtain the latest information in time to do the scheduling.
  • the X2 signaling needs to be defined, so as to ensure that the secondary eNB may forward the uplink BSR information, the downlink CSI information and PHR information received by the secondary eNB to the corresponding master eNB.
  • the content of the X2 signaling may be changed depending on the transmitted scheduling information, so as to achieve the forwarding of the scheduling information.
  • the X2 signaling for different scheduling information may also contain different content.
  • the scheduling information relates to an X2 signaling for forwarding the uplink BSR information
  • the X2 signaling must include the following portions:
  • the secondary eNB may forward the scheduling information to the master eNB in time.
  • the secondary eNB will forward the scheduling information to the master eNB without any delay.
  • the user equipment only sends the scheduling related scheduling information to the master eNB when the master eNB receives the scheduling related scheduling information from the user equipment.
  • the scheduling may be controlled by the master eNB.
  • the user equipment For the uplink BSR or the uplink PHR, the user equipment only selects an active uplink carrier component controlled by the master eNB to send the scheduling information. In such a manner, it is ensured that the master eNB may receive the uplink BSR and uplink PHR information.
  • the above mentioned scheme may be used together with the rules of the user equipment, so as to ensure that the uplink BSR/PHR information and CSI information are only available at the master eNB, it is important for the master eNB to achieve the scheduling.
  • the present invention provides a method for supporting dual connectivity in a secondary eNB of a carrier aggregation based wireless communication system, the method comprising the following steps:
  • the secondary eNB manages one or more small cells.
  • the secondary eNB sends the scheduling related scheduling information to the master eNB via X2 signaling periodically or in response to a first request instruction sent from the master eNB.
  • the secondary eNB sends a second indication information indicating the load situation of a small cell to the secondary eNB via X2 signaling periodically or in response to a second request instruction sent from the master eNB.
  • the master eNB may schedule well even if the master eNB is not aware of the load situation of the secondary eNB. Therefore, it is not needed to transmit the load situation of the secondary eNB to the master eNB in this case.
  • the master eNB if the load situation of the secondary eNB is high for example higher than the first threshold, then the master eNB must consider the load situation of the secondary eNB, at this time the load situation of the secondary eNB is needed to be transmitted to the master eNB.
  • the second indication information includes user equipment identifier and cell index.
  • the present invention further provides a method for supporting dual connectivity in a user equipment of a carrier aggregation based wireless communication system, wherein the user equipment sends scheduling related scheduling information to a master eNB and a secondary eNB, respectively.
  • the master eNB and the secondary eNB obtain the scheduling related scheduling information.
  • the uplink PHR information of the uplink carrier component for the master eNB will be transmitted on the cell controlled by the master eNB and the uplink PHR information of the uplink carrier component for the secondary eNB will be transmitted on the cell controlled by the secondary eNB; the downlink CSI information of the downlink carrier component for the master eNB will be transmitted on the cell controlled by the master eNB and the downlink CSI information of the downlink carrier component for the secondary eNB will be transmitted on the cell controlled by the secondary eNB.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/IB2014/001061 2013-05-10 2014-05-09 Method for supporting dual connectivity WO2014181181A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14748269.9A EP2995036A1 (en) 2013-05-10 2014-05-09 Method for supporting dual connectivity
JP2016512440A JP2016518793A (ja) 2013-05-10 2014-05-09 デュアル・コネクティビティをサポートするための方法
KR1020157034748A KR101698715B1 (ko) 2013-05-10 2014-05-09 이중 접속을 지원하기 위한 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310172970.5A CN104144511B (zh) 2013-05-10 用于支持双连接的方法
CN201310172970.5 2013-05-10

Publications (1)

Publication Number Publication Date
WO2014181181A1 true WO2014181181A1 (en) 2014-11-13

Family

ID=51298906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/001061 WO2014181181A1 (en) 2013-05-10 2014-05-09 Method for supporting dual connectivity

Country Status (4)

Country Link
EP (1) EP2995036A1 (ko)
JP (1) JP2016518793A (ko)
KR (1) KR101698715B1 (ko)
WO (1) WO2014181181A1 (ko)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581972A (zh) * 2014-12-30 2015-04-29 同济大学 基于fdm方式发送多个上行调度请求的传输方法和系统
WO2017171470A1 (en) * 2016-04-01 2017-10-05 Samsung Electronics Co., Ltd. Method for controlling wireless local area network aggregation and associated equipment
CN107277850A (zh) * 2016-04-01 2017-10-20 北京三星通信技术研究有限公司 无线局域网聚合的控制方法和相关设备
EP3286957A4 (en) * 2015-04-20 2018-12-12 Nokia Solutions and Networks Oy Method and apparatus for handling data activity of a secondary cell
US10945155B2 (en) 2016-10-19 2021-03-09 Huawei Technologies Co., Ltd. Method and apparatus for transmitting buffer status report

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102186906B1 (ko) * 2017-03-22 2020-12-04 에스케이텔레콤 주식회사 이중 연결 네트워크에서의 상향링크 전송지연 감소를 위한 방법 및 그 방법이 적용된 단말

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GB2458258A (en) * 2008-02-04 2009-09-16 Nec Corp Method of controlling base station loading in a mobile communication system
US8223708B2 (en) * 2008-06-10 2012-07-17 Innovative Sonic Limited Method and apparatus for handling scheduling information report
EP3442308B1 (en) * 2009-11-02 2020-03-25 Kyocera Corporation Radio communication system, low-power base station, high-power base station, radio terminal, and radio communication method
KR101480929B1 (ko) * 2010-02-12 2015-01-12 인터디지탈 테크날러지 코포레이션 다중 사이트 간의 데이터 분할
KR101831281B1 (ko) * 2010-04-06 2018-02-23 삼성전자주식회사 이동통신 시스템에서 스케줄링 정보를 처리하는 방법 및 장치

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ALCATEL-LUCENT SHANGHAI BELL ET AL: "Discussion on the RRC protocol supporting dual connectivity", vol. RAN WG2, no. Chicago, USA; 20130415 - 20130419, 6 April 2013 (2013-04-06), XP050699499, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_81bis/Docs/> [retrieved on 20130406] *
ALCATEL-LUCENT: "Discussion on inter-frequency small cell deployment and dual connectivity support", vol. RAN WG2, no. Chicago, USA; 20130415 - 20130419, 6 April 2013 (2013-04-06), XP050699500, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_81bis/Docs/> [retrieved on 20130406] *
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INTEL CORPORATION: "Dual connectivity for UEs supporting one UL CC", vol. RAN WG2, no. Chicago, USA; 20130415 - 20130419, 6 April 2013 (2013-04-06), XP050699530, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_81bis/Docs/> [retrieved on 20130406] *
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581972A (zh) * 2014-12-30 2015-04-29 同济大学 基于fdm方式发送多个上行调度请求的传输方法和系统
EP3286957A4 (en) * 2015-04-20 2018-12-12 Nokia Solutions and Networks Oy Method and apparatus for handling data activity of a secondary cell
WO2017171470A1 (en) * 2016-04-01 2017-10-05 Samsung Electronics Co., Ltd. Method for controlling wireless local area network aggregation and associated equipment
CN107277850A (zh) * 2016-04-01 2017-10-20 北京三星通信技术研究有限公司 无线局域网聚合的控制方法和相关设备
CN107277850B (zh) * 2016-04-01 2022-04-19 北京三星通信技术研究有限公司 无线局域网聚合的控制方法和相关设备
US11558789B2 (en) 2016-04-01 2023-01-17 Samsung Electronics Co., Ltd. Method for controlling wireless local area network aggregation and associated equipment
US10945155B2 (en) 2016-10-19 2021-03-09 Huawei Technologies Co., Ltd. Method and apparatus for transmitting buffer status report

Also Published As

Publication number Publication date
EP2995036A1 (en) 2016-03-16
JP2016518793A (ja) 2016-06-23
KR20160006730A (ko) 2016-01-19
CN104144511A (zh) 2014-11-12
KR101698715B1 (ko) 2017-01-20

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