WO2010121448A1 - Procede et dispositif permettant d'effectuer une agregation de porteuses - Google Patents

Procede et dispositif permettant d'effectuer une agregation de porteuses Download PDF

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Publication number
WO2010121448A1
WO2010121448A1 PCT/CN2009/072727 CN2009072727W WO2010121448A1 WO 2010121448 A1 WO2010121448 A1 WO 2010121448A1 CN 2009072727 W CN2009072727 W CN 2009072727W WO 2010121448 A1 WO2010121448 A1 WO 2010121448A1
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WO
WIPO (PCT)
Prior art keywords
base station
user terminal
interference
interfering
target
Prior art date
Application number
PCT/CN2009/072727
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English (en)
Chinese (zh)
Inventor
魏巍
Original Assignee
中兴通讯股份有限公司
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Publication date
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Publication of WO2010121448A1 publication Critical patent/WO2010121448A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for implementing carrier aggregation.
  • BACKGROUND In a next-generation broadband wireless communication network, how to support a larger bandwidth under the bandwidth of a current wireless communication system is to improve the inter-cell user terminal (UT terminal) throughput and UT average throughput.
  • LTE Long Term Evolution
  • Carrier aggregation is adopted to effectively support larger bandwidth in current wireless communication systems to meet the new generation. The need for metrics such as throughput and peak rate in the wireless standard.
  • Carrier aggregation is a key technology in future wireless communication systems.
  • LTE-Advanced Long-Term Evolution Advanced
  • LTE-Advanced Long-Term Evolution Advanced
  • the carrier aggregation discussed in LTE-Advanced does not take into account the impact of inter-cell interference that plays an important role in inter-cell UT throughput and inter-cell UT average throughput, if the aggregated carrier part suffers severe inter-cell interference. Impact, even if a larger bandwidth is obtained, the throughput and rate performance of the UT using the partially aggregated carrier is degraded due to severe inter-cell interference, thereby offsetting the benefits of carrier aggregation.
  • the existing related art does not consider the problem that the inter-cell interference in the carrier aggregation affects the UT throughput and the average throughput, and the throughput and rate performance of the UT are degraded, and an effective solution has not been proposed yet.
  • the present invention has been made in view of the problem in the prior art that the impact of inter-cell interference on UT throughput and average throughput in carrier aggregation is reduced, resulting in a decrease in throughput and rate performance of the UT.
  • the main purpose of the present invention is It is to provide a carrier aggregation scheme based on a restricted interference source to solve The above issues are resolved. According to an aspect of the present invention, a method of implementing carrier aggregation is provided.
  • the method for implementing carrier aggregation according to the present invention includes: a target base station determining a first interfering base station causing interference thereto; a target base station determining a second interfering base station causing interference to the user terminal; and the target base station according to the first interfering base station and the second
  • the interfering base station determines the reference base station; the target base station aggregates the carrier resources of the base station other than the reference base station according to the capability of the user terminal.
  • the first base station determined by the target base station to cause interference includes: the target base station measures the interference signal strength of each base station in the neighbor cell list, and the interference signal strength is greater than a preset restricted interference source selection threshold.
  • the base station is determined to be the first interfering base station.
  • the method further includes: for the target base station and the first interfering base station, each of the two base stations negotiates, so that the carrier resources of each two base stations are orthogonal to each other.
  • the second base station that the target base station determines to cause interference to the user terminal includes: the base station receives the measurement result reported by the user terminal, where the measurement result includes an interference signal of each base station in the neighbor cell list of the target base station to the user terminal. Intensity; the target base station determines, as the second interfering base station, a base station whose interference signal strength is greater than a preset interference source selection threshold in the measurement result.
  • the determining, by the target base station, the reference base station comprises: the target base station taking an intersection of the first interfering base station and the second interfering base station, and obtaining the reference base station.
  • the target base station aggregates carrier resources of the base station other than the reference base station according to the capability of the user terminal, including: the target base station determines the capability of the user terminal; and the target base station determines the number of base stations to perform aggregation according to the capability of the user terminal. , and/or the bandwidth size of each base station in the base station where the aggregation takes place.
  • the capabilities of the user terminal include: bandwidth capabilities of the user terminal.
  • an apparatus for implementing carrier aggregation which may be located at a base station side.
  • the device for implementing carrier aggregation according to the present invention includes: a first determining module, configured to determine a first interfering base station that causes interference to the base station; a second determining module, configured to determine a second interfering base station that causes interference to the user terminal; And configured to take an intersection between the first interfering base station and the second interfering base station, Obtaining a reference base station; a carrier aggregation module, configured to aggregate carrier resources of base stations other than the reference base station according to capabilities of the user equipment.
  • the foregoing first determining module includes: a measuring submodule, configured to measure an interference signal strength of each base station in a neighboring cell list of the base station; and a first determining submodule, configured to use the interference signal strength to be greater than a preset limit
  • the base station that interferes with the source selection threshold is determined to be the first interfering base station.
  • the second determining module includes: a receiving submodule, configured to receive the measurement result reported by the user terminal, where the measurement result includes an interference signal strength of each base station in the neighboring cell list of the target base station to the user terminal; And a determining submodule, configured to determine, as the second interfering base station, a base station whose interference signal strength in the measurement result is greater than a preset interference source selection threshold.
  • the base station when the base station performs carrier aggregation for the user terminal, the base station selects carrier resources other than the restricted interference source (interfering base station) that interferes with the user terminal, and can effectively solve the problem of carrier aggregation.
  • FIG. 1 is a flowchart of a method for implementing carrier aggregation according to an embodiment of the present invention
  • FIG. 2 is a detailed flowchart of a method for implementing carrier aggregation according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of an apparatus for implementing carrier aggregation according to a preferred embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is directed to the problem that the throughput and rate performance of the UT are degraded due to the impact of the inter-cell interference in the carrier aggregation on the UT throughput and the average throughput.
  • An implementation scheme of carrier aggregation based on a restricted interference source is provided.
  • the basic idea of the present invention is: determining a restricted interference source of a cell according to an interference source signal strength selection threshold, and limiting interference of the neighboring cell to a certain range.
  • the resources occupied by the restricted source 4 are completely orthogonal.
  • the base station selects carrier resources other than the restricted interference source that interferes with the user terminal to perform aggregation. It can effectively solve the defect that the system overhead is too large, the round-trip delay is too long, and the carrier reselection probability becomes large when considering the inter-cell interference coordination (ICIC) during carrier aggregation, and the carrier aggregation is implemented to meet the bandwidth requirement of the user terminal.
  • ICIC inter-cell interference coordination
  • FIG. 1 is a flowchart of a base station state control method according to an embodiment of the present invention. It should be noted that, for convenience of description, the technical solution of the method embodiment of the present invention is shown and described in FIG. The steps illustrated in Figure 1 may be performed in a computer system such as a set of computer executable instructions. Although the logical order is illustrated in FIG.
  • the steps shown or described may be performed in an order different than jt.
  • the method is used to determine parameters required for segmentation of a block to be transported, and mainly includes the following steps (step S102 to step S108 ): Step S102 , the target base station determines to cause interference to the (ie, the target base station)
  • the first interfering base station ie, the restricted interference source described above
  • the specific operation is: the target base station measures the interference signal strength of each base station in the neighbor cell list, and the interference signal strength is greater than the preset
  • the base station that limits the source selection threshold is determined to be the first interfering base station.
  • the first interfering base station is a set of base stations, and then, for the target base station and the first interfering base station, each of the two base stations is negotiated, so that The carrier resources of each two base stations are orthogonal to each other.
  • Step S104 The target base station determines a second base station that is caused by the user terminal, and the user terminal is currently at the target base station, that is, the target base station is a monthly base station of the user terminal.
  • the specific operation of the step is: the base station receives the measurement result reported by the user terminal, where the measurement result Including the interference signal strength of each base station in the neighbor cell list of the target base station to the user terminal; the target base station determines, as the second interference base station, the base station whose interference signal strength is greater than the preset restricted interference source selection threshold in the measurement result.
  • the second interfering base station is a set of base stations.
  • Step S106 The target base station determines the reference base station according to the first interfering base station and the second interfering base station, where the target base station obtains an intersection between the first interfering base station and the second interfering base station, and obtains a reference base station, where the reference base station is a
  • the base station is aggregated, and the set may be an empty set.
  • the first interfering base station is BS 1, BS 2, BS 3, BS 4, BS 7, and the second base station is BS 3, BS 5, BS 6, BS. 7.
  • BS 8 after the first interfering base station and the second interfering base station are intersected, the obtained reference base station is: BS 3 ⁇ BS 7.
  • Step S108 The target base station aggregates carrier resources of the base station other than the reference base station in the neighbor cell list according to the capability of the user terminal, where the specific operation is: the target base station determines the capability of the user terminal, and when the UE accesses the target base station The base station obtains the capability of the user terminal according to the relevant physical process (for example, a random access procedure); the target base station determines the number of base stations to be aggregated according to the capabilities of the user terminal, and/or the base station that performs aggregation.
  • the bandwidth of each base station, wherein the capability of the user terminal may include the bandwidth capability of the user terminal (for example, the bandwidth of the user terminal).
  • the bandwidth of the user terminal may be selected as four bandwidths. 5M base stations, and performing carrier aggregation on the four base stations, or selecting two base stations with a bandwidth of 10M, and performing carrier aggregation on the two base stations, and also selecting two bandwidths of 5M and one bandwidth. It is a 10M base station, and carrier aggregation is performed on the three base stations, and other selection methods are not used here. . It should be noted that, as the conditions of the user terminal change (for example, the movement of the user terminal, the change of the capability of the user terminal, etc.), if the new carrier formed after the aggregation by using the above method is regenerated, the inter-cell between the current system is not satisfied.
  • the new reference base station can be reselected by the above method provided by the present invention for carrier aggregation.
  • the user terminal uses the aggregated new resource
  • the foregoing method provided by the present invention may be reused, so that the base station is used.
  • the base station selects carrier resources other than the restricted interference source (interfering base station) that generates interference to the user terminal, and can effectively solve the carrier aggregation problem.
  • Step S201 the target base station determines the restricted interference.
  • Step S202 The target base station measures the interference signal strength of each base station in the neighbor cell list.
  • Step S203 The target base station selects a base station whose interference signal strength is higher than the restricted interference source selection threshold as its restricted interference source (ie, the first interference base station described above).
  • step S202 and step S203 the target base station finally determines a plurality of interference sources that generate strong inter-cell interference to the current cell according to the comparison result of the measured interference signal strength and the restricted interference source selection threshold.
  • Step S204 The target base station allocates carrier resources for the restricted base 4 and ensures that the carrier resources remain orthogonal, that is, the target base station negotiates with each of the plurality of interference sources, so that the carrier of each two base stations The resources are orthogonal to each other, so that interference between cells can be effectively reduced.
  • Step S205 The target base station determines the capability of the user terminal, where the capability of the user terminal mainly includes the bandwidth capability of the user terminal, and the bandwidth capability of the user terminal affects the number of carriers to be aggregated, and/or the bandwidth size of each carrier.
  • Step S206 the user equipment measures the interference signal strength of each base station in the neighbor cell list, and sends the measurement result to the target base station.
  • Step S207 The target base station determines, as the second interfering base station, the base station whose interference signal strength is greater than the preset interference source selection threshold in the measurement result, and the base station in the second interfering base station causes the user terminal to be dry, and the target base station It is checked whether the base station causing the user terminal is a restricted interference source.
  • Step S208 The target base station determines a base station that causes interference to the user terminal in the restricted interference source. (ie, the reference base station above), and select carrier resources from any carrier resources other than the reference base stations for aggregation to form a new carrier to meet the capability requirements of the user terminal. For example, if the bandwidth of the user terminal is 30 M, three base stations with a bandwidth of 10 M can be selected, and carrier aggregation is performed for the three base stations. Six base stations with a bandwidth of 5 M can also be selected, and the six base stations are selected. The base station performs carrier aggregation.
  • step S207 and step S208 when the target base station selects a carrier resource for the user terminal, selecting carrier resources that generate less inter-cell interference to the user terminal, that is, avoiding the limited interference source directly interfering with the user terminal, It is beneficial to further reduce inter-cell interference.
  • Step S209 The target base station may select any carrier resource in the neighbor cell list to be aggregated to form a new carrier to meet the capability requirement of the user terminal. In this way, the base station can form a new carrier with a larger bandwidth that satisfies the capability of the user terminal through aggregation.
  • the above method for carrier aggregation based on restricted interference sources is a generally applicable, easy-to-use, easy-to-use method that considers inter-cell interference.
  • a computer readable medium having stored thereon computer executable instructions for causing a computer or processor to perform, for example, when executed by a computer or processor
  • the processing of the steps shown in Figs. 1 and 2 can implement the above-described method embodiments.
  • Apparatus Embodiments According to an embodiment of the present invention, a device for implementing carrier aggregation is provided, and the apparatus may be located at a base station side, and may be used to implement the foregoing method for implementing carrier aggregation. FIG.
  • the apparatus includes a first determining module 1, a second determining module 2, an obtaining module 3, and a carrier aggregation module 4.
  • the function of each module is described below.
  • the first determining module 1 is configured to determine a first interfering base station that causes interference to the base station;
  • the second determining module 2 is configured to determine a second interfering base station that causes interference to the user terminal;
  • the obtaining module 3 is connected to the first determining module 1
  • a second determining module 2 configured to: the first interfering base station and the second interfering base station The intersection aggregation is performed to obtain a reference base station.
  • the carrier aggregation module 4 is connected to the acquisition module 3, and is configured to aggregate carrier resources of base stations other than the reference base station according to the capability of the user equipment.
  • FIG. 4 is a schematic structural diagram of a device for implementing carrier aggregation according to an embodiment of the present invention. As shown in FIG. 4, on the basis of the device shown in FIG. 3, the first determining module 1 includes a measurement submodule 12 and a first The sub-module 14 is determined, and the second determining module 2 includes a receiving sub-module 22 and a second determining sub-module 24.
  • the first determining module 1 includes: a measuring sub-module 12, configured to measure an interference signal strength of each base station in a neighboring cell list of the base station; a first determining sub-module 14 connected to the measuring sub-module 12, configured to use the interference signal strength A base station that is larger than a preset interference source selection threshold is determined to be the first base station.
  • the second determining module 2 includes: a receiving submodule 22, configured to receive the measurement result reported by the user terminal, where the measurement result includes an interference signal strength of each base station in the neighboring cell list of the target base station to the user terminal;
  • the sub-module 24 is connected to the receiving sub-module 22, and is configured to determine, as a second base station, a base station whose interference signal strength in the measurement result is greater than a preset interference source selection threshold.
  • the restricted interference source of the cell is determined according to the interference source signal strength selection threshold, and the interference of the neighboring cell is limited to a certain range, and in the resource During the planning, it is ensured that the resources occupied by the restricted source 4 are completely orthogonal.
  • the base station performs carrier aggregation for the user terminal, the base station selects a carrier resource other than the restricted source 4 of the user terminal to perform aggregation.
  • the carrier aggregation is considered, the system overhead of the inter-cell interference coordination is too large, the round-trip delay is too long, and the carrier reselection probability becomes large.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

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

Abstract

L'invention concerne un procédé et un dispositif permettant d'effectuer une agrégation de porteuses. Selon ce procédé : la station de base cible détermine la première station de base brouilleuse qui cause des interférences avec la station de base cible elle-même (S102) ; la station de base cible détermine la deuxième station de base brouilleuse qui cause des interférences avec le terminal utilisateur (S104) ; la station de base cible détermine la station de base de référence, en fonction de la première et de la deuxième station de base brouilleuses (S106) ; et la station de base cible agrège les ressources de porteuses de la station de base, à l'exception de la station de base de référence, en fonction de la capacité du terminal utilisateur (S108). Le mode de réalisation selon l'invention permet de résoudre les problèmes liés au fait que le surdébit est excessif, que le temps de propagation aller-retour est trop long et que la probabilité de réélection de porteuses est plus importante, et qui sont causés par le souci d'harmonie d'interférence entre les cellules lorsque la porteuse est agrégée. L'invention permet également de réduire les interférences entre les cellules lorsque l'agrégation de porteuses peut répondre aux besoins de largeur de bande du terminal utilisateur, de sorte à assurer la qualité de communication sans fil du terminal utilisateur.
PCT/CN2009/072727 2009-04-20 2009-07-10 Procede et dispositif permettant d'effectuer une agregation de porteuses WO2010121448A1 (fr)

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CN200910130926.1 2009-04-20
CN200910130926A CN101867967A (zh) 2009-04-20 2009-04-20 载波聚合的实现方法和装置

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CN102917395B (zh) * 2011-08-05 2017-12-19 中兴通讯股份有限公司 同频段非相邻载波聚合的执行判定方法及系统
US8934869B2 (en) * 2012-12-19 2015-01-13 Amazon Technologies, Inc. Determining mobility states for a user device
CN103068050B (zh) 2012-12-25 2016-12-28 上海无线通信研究中心 一种时分双工系统中基于干扰感知的上下行时隙资源配置方法
CN103327533B (zh) * 2013-05-20 2016-01-20 北京邮电大学 一种载波聚合系统中基于用户移动的成员载波选择方法
US10090976B2 (en) * 2014-04-30 2018-10-02 Telefonaktiebolaget Lm Ericsson (Publ) User equipment, a network node and methods therein for enabling Device-to-Device (D2D) communication in a radio communications network
CN106507368B (zh) * 2015-09-08 2019-11-05 上海无线通信研究中心 一种网络频谱共享方法和系统
WO2020097942A1 (fr) * 2018-11-16 2020-05-22 华为技术有限公司 Procédé d'identification de capacité de largeur de bande de terminal, dispositif et système

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US20080171546A1 (en) * 2007-01-11 2008-07-17 Samsung Electronics Co., Ltd. Communication method and apparatus in cognitive radio environment

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