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WO2013000311A1 - Procédé et dispositif pour une transmission de pdcch - Google Patents

Procédé et dispositif pour une transmission de pdcch Download PDF

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Publication number
WO2013000311A1
WO2013000311A1 PCT/CN2012/073489 CN2012073489W WO2013000311A1 WO 2013000311 A1 WO2013000311 A1 WO 2013000311A1 CN 2012073489 W CN2012073489 W CN 2012073489W WO 2013000311 A1 WO2013000311 A1 WO 2013000311A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdcch
subframe
cell
user equipment
subframes
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/CN2012/073489
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English (en)
Chinese (zh)
Inventor
朱志球
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.)
China Academy of Telecommunications Technology CATT
Original Assignee
China Academy of Telecommunications Technology CATT
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 China Academy of Telecommunications Technology CATT filed Critical China Academy of Telecommunications Technology CATT
Publication of WO2013000311A1 publication Critical patent/WO2013000311A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences

Definitions

  • IM multi-cell interference reduction
  • Inter uplink and downlink semi-static ICIC
  • the PDCCH Since the PDCCH needs to be sub-block interleaved and cyclically shifted, it is difficult to find the correspondence between the CCE logical index and the REG physical resource index. Therefore, the PDCCH cannot use a soft frequency multiplexing or partial frequency reuse strategy like a shared channel. In the existing PDCCH resource allocation scheme of the LTE system, how to reduce inter-cell interference is not considered. Therefore, the current PDCCH resource allocation scheme will generate relatively strong inter-cell interference in the downlink control region. Summary of the invention
  • Step 101 Perform resource planning according to a normalized PDCCH transmit power value (the subsequent transmit power values other than the adjusted transmit power value in the transmit parameter are all normalized transmit power values) All the subframes in the time segment are divided into multiple subframe sets, where the transmit power value of the PDCCH is a transmit power value that is expected to be used when transmitting the PDCCH to the user equipment;
  • Step 102 Determine, according to a comparison result of the transmit power value and a normalized power threshold of the strong-interference PDCCH, a transmit parameter that carries a PDCCH subframe in each subframe set, and send a PDCCH according to the corresponding transmit parameter, where
  • the strong PDCCH is a PDCCH corresponding to the transmit power value being greater than the first threshold. Since the PDCCH interference is not always strong, the CCIM policy does not need to be always enabled.
  • a preferred method is to activate the CCIM policy and perform the solution of the embodiment of the present invention when a certain condition is met. There are plans to proceed.
  • the first method is not limited to the division mode of the modulo value, and the embodiment of the present invention is applicable to any division manner in which any two cells in the same cell collection are not adjacent in physical position.
  • the CCIM policy the real-time estimation of the cell that activates the CCIM policy may cause a resource usage requirement of the PDCCH that is strongly interfered, and determine which subframes need to be used by each cell in the resource planning time period to transmit a PDCCH that may cause strong interference to the neighboring cell.
  • the specific subframe position it is necessary to consider the location of the strong cell PDCCH subframe of the neighboring cell.
  • the PDCCH transmit power of the user equipment can be used to measure the interference contribution of the PDCCH of the user equipment to the neighboring cell, and the user equipment is divided into N (N>1, and the typical value is 2, 3). ) a collection.
  • P PDCCH- ⁇ comparing the PDCCH transmit power of the normalized user equipment with the set threshold to determine which interference set the user equipment belongs to: Suppose that the user equipment is currently divided into N sets, and then set in advance N-1 set partition threshold
  • the division of the foregoing set is not static, but needs to be dynamically adjusted according to the real-time transmit power value of the PDCCH of the user equipment.
  • the number of subframes of the PDCCH that the local cell needs to carry strong interference is determined according to formula 2:
  • the resources of the neighboring cells may be coordinated and used in a manner in which the PDCCHs of the subframes are strongly interfered with each other in the future.
  • the normalized power threshold is used on a subframe of a PDCCH that does not carry a strong interference in each subframe set.
  • the value is used as the maximum value of the transmit power, and the aggregation level is increased, so that the adjusted transmission parameter ensures that the actual received signal-to-noise ratio of the user equipment is not lower than the third threshold.
  • the sub-frames in which: 3 and 3 are displayed the user equipment whose normalized transmit power value is lower than the preset threshold value of 77 ⁇ - 7 ⁇ can maintain its original transmit power and aggregation level.
  • the transmit power may be appropriately raised and the PDCCH aggregation level may be lowered to save PDCCH resources; ), 3 dry mgh subframes, and the normalized transmit power value is higher than a preset threshold TH HI PDCCH User equipment (ie, a collection of users whose PDCCH may cause strong interference to neighbors)
  • a preset threshold TH HI PDCCH User equipment ie, a collection of users whose PDCCH may cause strong interference to neighbors
  • the original UE priority queue is adjusted according to the set of belonging users, and the adjusted
  • the PDCCH resource allows the UE in (UE UE3, UE4) to transmit the PDCCH with a lower aggregation level and higher power.
  • the original UE priority queue is adjusted according to the set of belonging users, and the adjusted The UE priority queues are UE1, UE3, and UE4.
  • the PDCCH resources are allocated to the UEs in this order, and some margins for the interference improvement of the neighboring cells are reserved in the resource allocation process.
  • UE priority queue For cells belonging to C1, in accordance with the user belongs to a set of original UE priority queue is adjusted (the order of U exter ⁇ U medmte ⁇ U mt er), UE priority queue adjusted to UE 2, UE5, UE3, UE4 , UE1, UE6; PDCCH resources are allocated to each UE in the adjusted queue in turn.
  • the original UE priority queue is adjusted according to the set of belonging users (sequence Ue), the adjusted UE priority queue is UE3, UE4, UE1, UE6, UE2, UE5; and PDCCH resources are allocated to each UE in the adjusted queue in turn.
  • the first 6 subframes in the queue are selected as the subframes that the current cell will use to carry the strong interference PDCCH, ie, ⁇ s, sf5, sfl0, sfl, sfl6, sfD ⁇ , and inform the neighboring cell of this information.
  • the resource set generation module 20 determines the number of subframes that need to carry the strong interference PDCCH in the resource planning time period; and divides the subframes in the resource planning time period into multiple subframe sets according to the determined number of subframes.
  • the adjusting module 21 when determining the sending parameter, carries the strong PDCCH sub-carrier in each subframe set for the corresponding user equipment whose transmit power value is not less than the normalized power threshold.
  • a user equipment whose scheduling priority is higher than the corresponding transmit power value is less than the normalized power threshold, and the corresponding user equipment whose transmit power value is smaller than the normalized power threshold
  • the transmit power value and the aggregation level remain unchanged, or increase the transmit power value and reduce the aggregation level, so that the adjusted transmit parameters ensure that the actual received signal-to-noise ratio of the user equipment is not lower than the third threshold;
  • For the user equipment whose corresponding transmit power value is not less than the normalized power threshold no scheduling is performed on the subframe of the PDCCH that does not carry the strong interference in each subframe set, or scheduling is performed but the scheduling is prioritized.
  • the level is lower than the corresponding user equipment whose transmit power value is less than the normalized power threshold.

Landscapes

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

Abstract

Des modes de réalisation de la présente invention concernent le domaine technique des communications sans fil, et concernent de manière spécifique un procédé et un dispositif pour transmettre un PDCCH, applicables dans la résolution du problème de l'état antérieur de la technique d'interférence importante entre des cellules dans une région de commande de liaison descendante. Le procédé des modes de réalisation de la présente invention comprend : la division, sur la base d'une valeur de puissance de transmission normalisée du PDCCH, de toutes les sous-trames à l'intérieur d'une période de planification de ressource en de multiples ensembles de sous-trames ; la détermination, sur la base du résultat de la comparaison de la valeur de puissance de transmission à une valeur seuil de puissance normalisée du PDCCH d'une interférence importante, d'un paramètre de transmission d'une sous-trame portant le PDCCH parmi chaque ensemble de sous-trames, et la transmission du PDCCH sur la base du paramètre de transmission correspondant ; le PDCCH d'interférence importante étant le PDCCH correspondant ayant sa valeur de puissance de transmission qui est supérieure à une première valeur seuil. Du fait que l'interférence entre les cellules est prise en considération lors de la détermination du paramètre de transmission de la sous-trame portant le PDCCH, l'interférence entre les cellules de la région de commande de liaison descendante est ainsi réduite.
PCT/CN2012/073489 2011-06-29 2012-04-01 Procédé et dispositif pour une transmission de pdcch Ceased WO2013000311A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110180115.XA CN102404853B (zh) 2011-06-29 2011-06-29 一种发送pdcch的方法和设备
CN201110180115.X 2011-06-29

Publications (1)

Publication Number Publication Date
WO2013000311A1 true WO2013000311A1 (fr) 2013-01-03

Family

ID=45886509

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/073489 Ceased WO2013000311A1 (fr) 2011-06-29 2012-04-01 Procédé et dispositif pour une transmission de pdcch

Country Status (2)

Country Link
CN (1) CN102404853B (fr)
WO (1) WO2013000311A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140286283A1 (en) * 2011-10-26 2014-09-25 Lg Electronics Inc. Method and apparatus for controlling inter-cell interference in wireless communication system
CN104254120A (zh) * 2013-06-28 2014-12-31 普天信息技术研究院有限公司 一种下行传输的控制方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8743820B2 (en) 2012-05-30 2014-06-03 Intel Corporation PUCCH resource allocation with enhanced PDCCH
CN103582031B (zh) * 2012-07-20 2016-09-07 中国移动通信集团公司 一种物理下行控制信道资源分配方法及设备
CN102821470B (zh) * 2012-08-08 2015-09-23 大唐移动通信设备有限公司 一种物理下行控制信道资源分配方法及装置
EP3651521B1 (fr) 2013-01-18 2021-05-19 Huawei Technologies Co., Ltd. Procédé de détection et appareil de canal de commande commun
CN104144031B (zh) * 2013-05-09 2019-08-30 中兴通讯股份有限公司 一种下行控制信令传输方法及装置
JP6378679B2 (ja) * 2013-07-12 2018-08-22 シャープ株式会社 端末装置および方法
CN104125645B (zh) * 2014-07-18 2017-11-28 大唐移动通信设备有限公司 一种控制信道单元聚合等级确定方法及装置
US11647533B2 (en) * 2020-11-02 2023-05-09 Motorola Solutions, Inc. Device, system and method for dynamically adjusting a queue structure and message sequencing

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CN1819690A (zh) * 2006-03-31 2006-08-16 北京邮电大学 一种应用于fdd/ofdm系统的下行干扰抑制方法
CN101494480A (zh) * 2008-01-22 2009-07-29 中兴通讯股份有限公司 一种无线通信网络的小区间干扰协调方法
CN102065490A (zh) * 2011-01-17 2011-05-18 大唐移动通信设备有限公司 基站间下行发射功率的协调方法和设备

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1819690A (zh) * 2006-03-31 2006-08-16 北京邮电大学 一种应用于fdd/ofdm系统的下行干扰抑制方法
CN101494480A (zh) * 2008-01-22 2009-07-29 中兴通讯股份有限公司 一种无线通信网络的小区间干扰协调方法
CN102065490A (zh) * 2011-01-17 2011-05-18 大唐移动通信设备有限公司 基站间下行发射功率的协调方法和设备

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140286283A1 (en) * 2011-10-26 2014-09-25 Lg Electronics Inc. Method and apparatus for controlling inter-cell interference in wireless communication system
US9520970B2 (en) 2011-10-26 2016-12-13 Lg Electronics Inc. Method and device for inter cell interference coordination in wireless communication system
US9686058B2 (en) 2011-10-26 2017-06-20 Lg Electronics Inc. Method and apparatus for controlling inter-cell interference in wireless communication system
US9838175B2 (en) * 2011-10-26 2017-12-05 Lg Electronics Inc. Method and apparatus for controlling inter-cell interference in wireless communication system
CN104254120A (zh) * 2013-06-28 2014-12-31 普天信息技术研究院有限公司 一种下行传输的控制方法
CN104254120B (zh) * 2013-06-28 2018-02-02 普天信息技术研究院有限公司 一种下行传输的控制方法

Also Published As

Publication number Publication date
CN102404853A (zh) 2012-04-04
CN102404853B (zh) 2014-03-12

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