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WO2012009924A1 - Procédé permettant de diviser une ressource de temps-fréquence et station de base - Google Patents

Procédé permettant de diviser une ressource de temps-fréquence et station de base Download PDF

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Publication number
WO2012009924A1
WO2012009924A1 PCT/CN2010/079719 CN2010079719W WO2012009924A1 WO 2012009924 A1 WO2012009924 A1 WO 2012009924A1 CN 2010079719 W CN2010079719 W CN 2010079719W WO 2012009924 A1 WO2012009924 A1 WO 2012009924A1
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WO
WIPO (PCT)
Prior art keywords
base station
threshold
area
point
frequency band
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/CN2010/079719
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English (en)
Chinese (zh)
Inventor
刘广
张博
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.)
ZTE Corp
Original Assignee
ZTE Corp
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 ZTE Corp filed Critical ZTE Corp
Publication of WO2012009924A1 publication Critical patent/WO2012009924A1/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
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/12—Fixed resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures

Definitions

  • Frequency reuse technology is a networking technology proposed to improve spectrum utilization and expand system capacity.
  • the traditional frequency reuse technology can be divided into an inter-frequency multiplexing technology and an equal frequency multiplexing technology.
  • the same frequency multiplexing technology can achieve a frequency reuse factor of 1, that is, cells within the coverage of the entire system use the same frequency band to serve users in the cell.
  • the same-frequency multiplexing technology has a high spectrum utilization and system capacity because the multiplexing factor is only 1.
  • Fractional Frequency Reuse (FFR) technology is a new technology to increase system capacity.
  • FFR Frequency Division Multiple Access
  • FIG. 1 is a schematic diagram of an FFR scheme in an omnidirectional cell.
  • the inner ring area of the omni-directional cell can use the entire frequency band of the system, the outer ring area can only use part of the frequency band. Since there is no sector division, the outer loop user throughput is low, so the throughput of the entire cell is not high.
  • a split-cell FFR scheme is employed, as shown in FIG.
  • the scheme divides users in the sectors of the cell that are centered from the base station and whose signal quality is centered into all frequency band areas B, and divides users with stronger and weaker signal quality into the near-point partial frequency band area C and the far-point partial frequency band area.
  • the scheme improves the throughput of the partial frequency band region of the cell, but since the time domain does not divide all the frequency band regions of each sector, the spatial physical isolation must be used between all the frequency band regions to reduce The same frequency interference between all frequency bands of each sector does not completely eliminate mutual interference between all frequency bands, and the coverage of all frequency bands is reduced, so that the overall throughput of the cell is limited.
  • a method for dividing a time-frequency resource includes: dividing a sector of a base station into a plurality of regions; and using adjacent ones of the plurality of regions in different frequency domains and time domains.
  • dividing the sector of the base station into the plurality of regions comprises: dividing the sector of the base station into a plurality of regions based on a carrier interference noise ratio CINR.
  • dividing the sector of the base station into multiple regions comprises: dividing a sector of the base station into a near-point partial frequency band region, a far-point partial frequency band region, and a mid-point full-band region, wherein the midpoint full-band region uses the base station The entire frequency band, the near-point partial band region and the far-point partial band region use part of the frequency band of the base station.
  • the near-point partial band region, the far-point partial band region, and the mid-point full-band region use different power control, and the transmission power of the near-point partial band region ⁇ the mid-point full-band region transmission power ⁇ the far-point portion band The transmit power of the area.
  • dividing the sector of the base station into multiple regions based on the carrier interference-to-noise ratio CINR includes: counting CINR values from the terminal; if the CINR value is greater than the first threshold, determining that the region where the terminal is located is a near-point portion a frequency band region; if the CINR value is less than or equal to the first threshold value and greater than or equal to the second threshold value, determining that the region where the terminal is located is a midpoint full-band region; if the CINR value is less than the second threshold, determining the terminal The area in which it is located is a partial frequency band region; wherein, the first threshold The value is greater than the second threshold.
  • the near-point partial band region and the far-point partial band region use the same frequency band.
  • the frequency bands used in the near-point partial band region and the far-point partial band region are both one-third of the total frequency band of the base station.
  • each of the plurality of regions uses a different frequency domain and/or time domain.
  • a base station includes: a dividing module, configured to divide a sector of the base station into multiple regions; and a time domain module, configured to use different frequency domains and time domains in each of the multiple regions.
  • the sector of the base station is divided into a near-point partial frequency band area, a far-point partial frequency band area, and a mid-point full-band area
  • the dividing module comprises: a statistics module, configured to collect a carrier interference noise ratio CINR value from the terminal
  • the first determining module is configured to determine whether the CINR value is greater than the first threshold, where, if the CINR value is greater than the first threshold, determining that the area where the terminal is located is a near-point partial frequency band region; And determining whether the CINR value is greater than a second threshold, where, if the CINR value is less than or equal to the first threshold and greater than or equal to the second threshold, determining that the region where the terminal is located is a midpoint full-band region, if CINR If the value is less than the second threshold, it is determined that the area where the terminal is located is a far-end partial frequency band region; wherein, the first threshold value is greater than the second threshold value.
  • the sector of the base station is divided into multiple regions; the adjacent regions in the multiple regions use different frequency domains and time domains, thereby solving the problem that the interference of the neighboring cells of the base station is relatively serious, and further The effect of reducing the interference of neighboring cells of the base station is achieved.
  • FIG. 1 is a schematic diagram of FFR area division of an omnidirectional cell according to the related art
  • FIG. 2 is a schematic diagram of FFR area division in an FFR scheme according to the related art
  • FIG. 3 is a diagram according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for dividing a frequency resource according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for dividing a time-frequency region based on an OFDMA system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a base station according to an embodiment of the present invention
  • FIG. 7 is a preferred embodiment of a base station according to the present invention; Schematic diagram.
  • FIG. 3 is a schematic diagram of time-frequency region partitioning based on an OFDMA system according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps S302 to S304: Step S302, dividing a sector of a base station into multiple regions; Step S304, using adjacent frequency regions in different regions of the multiple regions And time domain.
  • the regions in the base station can be effectively reduced. Interference between the base station and the base station can also be effectively reduced.
  • the dividing the sector of the base station into multiple regions may divide the sector of the base station into multiple regions based on the carrier interference noise ratio CINR.
  • dividing the sector of the base station into the multiple regions comprises: dividing the sector of the base station into three regions: a near-point partial frequency band region, a far-point partial frequency band region, and a mid-point full-band region, wherein the midpoint full-band region Using the entire frequency band of the base station, the near-point partial band region and the far-point partial band region use a partial band of the base station.
  • the near-point partial band region, the far-point partial band region, and the mid-point full-band region use different power control, and the transmission power of the near-point partial band region ⁇ the transmission power of the mid-point full-band region ⁇ the emission of the far-point partial band region power.
  • the dividing the sector of the base station into multiple regions based on the carrier interference noise ratio CINR includes: calculating a CINR value from the terminal; if the CINR value is greater than the first threshold, determining that the area where the terminal is located is a near-point partial frequency band region; If the CINR value is less than or equal to the first threshold value and greater than or equal to the second threshold value, determining that the area where the terminal is located is the midpoint full-band area; if the CINR value is less than the second threshold, determining the area where the terminal is located Partial band area for the far point. Wherein, the first threshold is greater than the second threshold.
  • the system is divided into a near-point partial band region, a far-point partial band region, and a mid-point full-band region by three regions based on CINR.
  • the influence of the three frequency band regions corresponds to three physical regions.
  • Users in any adjacent area are staggered according to the frame structure time domain or frequency domain to minimize the interference.
  • the time-frequency resource can be 9-shared, and users of any adjacent regions can be staggered according to the frame structure time domain or the frequency domain, and different power control is performed on the three frequency band regions, so that three frequency bands are implemented.
  • the impact of the area corresponds to three physical areas.
  • the time-frequency area occupied by the users in the cell is divided into three areas according to the strength of the user signal (for the convenience of description, the signal quality is represented by CINR), and each area user can use the same number of Symbols. As shown in FIG.
  • the CINR thresholds of the frames divided according to the time domain are T, TH2 from low to high, and the areas occupied by users corresponding to the corresponding signal quality requirements are A, B, and C, respectively.
  • T time domain
  • the C region with stronger signal and the ⁇ region with weak signal are respectively divided into the near-point partial frequency band region and the far-point partial frequency band region.
  • the B region in which the signal quality is centered is divided into the entire band region (that is, the midpoint full band region).
  • the sector 1 time domain division order is the sector 2 time domain division order of C2, 42, 2 respectively
  • the sector 3 time domain division order is S3, C3, ⁇ 3, respectively.
  • Users in all frequency bands of different sectors are served at different times, and the number of users in all frequency band areas can be basically eliminated.
  • the user of the entire band area (for example) is simultaneously the neighboring sector part of the band area i or the user ( ⁇ 2 and C3), due to the near-point partial band area user C 3 signal that is closer to the entire band area or the user.
  • the quality is good, and it is especially small by the user Si from all frequency bands.
  • the other sector is the same as the user of all the band areas.
  • the user is simultaneously at the far side of the band.
  • the signal quality is not high, the physical distance is It is far away from all frequency bands, and can be ignored.
  • Step S501 the time-frequency region is divided based on the frame structure.
  • the frame structure is divided into three intervals according to the time domain Symbol (specifically, each segment occupies the number of Symbols depending on the specific situation;).
  • the three time i or Symbol intervals of the first sector are sequentially determined as the near-point partial band region i or all of the band region i or the far-point portion band region i or the occupied time i or interval.
  • the near-point partial band region i is the same as the far-point portion band region i or the used band, and is both a one-third system total band.
  • Step S502 determining an area to which the user belongs, and counting the average value of the CINR of the user MS.
  • step S503 it is determined whether the average value of the CINR is greater than the first threshold TH2. If the determination result is YES, step S504 is performed, and if the determination result is negative, step S505 is performed.
  • step S504 if the CINR average value of the MS is greater than the first threshold TH2, it is determined that the MS is a near-point partial frequency band area user, and then step S508 is performed.
  • Step S 505 determining whether the average value of the CINR is less than or equal to the first threshold TH2 and greater than the second threshold TH1. If the determination result is yes, step S506 is performed, and if the determination result is no, step 4 is performed. .
  • Step S506 if the average CINR of the MS is less than or equal to the first threshold TH2 and greater than the second threshold TH1, it is determined that the MS is a user of all frequency band regions, and then step S508 is performed.
  • Step S507 if the CINR average value of the MS is less than or equal to the second threshold ⁇ , it is determined that the MS is a far-end partial frequency band area user, and then step S508 is performed.
  • Step S508 selecting a matched time-frequency region according to the type of the region to which the user belongs.
  • the present invention is suitable for enabling when system bandwidth is congested.
  • the area may be extended to an adjacent area in the time domain.
  • the invention divides the system into all frequency band regions, three parts of the near-point partial frequency band region and the far-point partial frequency band region based on the CINR, and performs different power control on the three frequency band regions, so that the influence of the three frequency band regions corresponds to three physical bodies. region.
  • All the frequency band regions use the entire frequency band of the system, and the spectrum multiplexing rate is high, and the coverage of the entire frequency band region of the present invention is larger than that of the inner FFR scheme inner loop region, thereby improving the overall spectrum utilization rate of the system and further increasing the system capacity. Big.
  • the regions in which different sectors occupy the same frequency domain resources are staggered based on the frame structure time domain. Since the physical space isolation and time domain isolation are fully utilized, the interference in the system is effectively reduced. From the above description, it can be seen that the present invention can effectively reduce the interference between the various areas of the base station or between the respective base stations.
  • FIG. 6 is a schematic diagram of a base station according to an embodiment of the present invention.
  • the base station includes a partitioning module 602 and a time domain module 604.
  • the dividing module 602 is configured to divide a sector of the base station into multiple regions; the time domain module 604 is configured to use different frequency domains and time domains for each of the multiple regions.
  • the sector of the base station is divided into a near-point partial frequency band area, a far-point partial frequency band area, and a mid-point full-band area, wherein, as shown in FIG. 7, the dividing module 602 may include a statistic module 612, A determination module 614 and a second determination module 616.
  • the statistic module 612 is configured to collect the carrier frequency ratio CINR value from the terminal.
  • the first determining module 614 is configured to determine whether the CINR value is greater than the first threshold, where the CINR value is greater than the first a threshold value, the area where the terminal is located is determined to be the near-point partial frequency band area; the second determining module 616 is configured to determine whether the CINR value is greater than a second threshold value, where the CINR value is less than And equal to the first threshold value and greater than or equal to the second threshold value, determining that the area where the terminal is located is the midpoint full-band area, if the CINR value is less than the second threshold And determining that the area where the terminal is located is the far-end partial frequency band area, where the first threshold value is greater than the second threshold value.
  • 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.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modification, equivalent substitution, improvement, etc. made within the "God and Principles" of the present invention shall be included in the protection of the present invention. Within the scope.

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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 permettant de diviser une ressource de temps-fréquence et une station de base. Plus précisément, le procédé de division d'une ressource de temps-fréquence consiste à : diviser le secteur de la station de base en de multiples régions ; et utiliser différents domaines de fréquence et différents domaines temporels dans les régions adjacentes des multiples régions. Conformément à l'invention, le brouillage entre les régions adjacentes de la station de base peut être réduit.
PCT/CN2010/079719 2010-07-20 2010-12-13 Procédé permettant de diviser une ressource de temps-fréquence et station de base Ceased WO2012009924A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010233944.5A CN102340776B (zh) 2010-07-20 2010-07-20 时频资源的划分方法及基站
CN201010233944.5 2010-07-20

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WO2012009924A1 true WO2012009924A1 (fr) 2012-01-26

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Publication number Priority date Publication date Assignee Title
CN103650564B (zh) * 2013-07-05 2018-02-02 华为技术有限公司 共小区的资源分配方法和设备
US10462792B2 (en) * 2015-05-29 2019-10-29 Apple Inc. Determining a location of a UE within a coverage area
CN112738896B (zh) * 2020-12-25 2022-07-12 哈尔滨海能达科技有限公司 物联网数据传输方法、基站、基站控制器及数字同播系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1885752A (zh) * 2005-06-20 2006-12-27 华为技术有限公司 多小区频率复用的实现方法
CN101521922A (zh) * 2009-03-25 2009-09-02 华为技术有限公司 一种复用区切换方法和服务器
CN101742519A (zh) * 2008-11-05 2010-06-16 中国移动通信集团公司 一种频率资源分配方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1885752A (zh) * 2005-06-20 2006-12-27 华为技术有限公司 多小区频率复用的实现方法
CN101742519A (zh) * 2008-11-05 2010-06-16 中国移动通信集团公司 一种频率资源分配方法及装置
CN101521922A (zh) * 2009-03-25 2009-09-02 华为技术有限公司 一种复用区切换方法和服务器

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CN102340776B (zh) 2014-06-11

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