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WO2011097756A1 - Method and device for allocating frequency bands by using frequency reuse - Google Patents

Method and device for allocating frequency bands by using frequency reuse Download PDF

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Publication number
WO2011097756A1
WO2011097756A1 PCT/CN2010/000193 CN2010000193W WO2011097756A1 WO 2011097756 A1 WO2011097756 A1 WO 2011097756A1 CN 2010000193 W CN2010000193 W CN 2010000193W WO 2011097756 A1 WO2011097756 A1 WO 2011097756A1
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WO
WIPO (PCT)
Prior art keywords
cell
user terminal
edge
cell edge
band
Prior art date
Application number
PCT/CN2010/000193
Other languages
French (fr)
Chinese (zh)
Inventor
刘建国
王栋耀
庞继勇
沈钢
蒋琦
Original Assignee
上海贝尔股份有限公司
阿尔卡特朗讯
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 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to PCT/CN2010/000193 priority Critical patent/WO2011097756A1/en
Priority to CN201080058113.7A priority patent/CN102696250B/en
Publication of WO2011097756A1 publication Critical patent/WO2011097756A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to an apparatus for performing frequency band allocation using frequency reuse in a relay communication system, which can improve reception performance of a cell edge user terminal ( ⁇ ).
  • Background technique
  • inter-cell interference occurs when neighboring cells allocate the same frequency bandwidth to different UEs.
  • Inter-cell interference due to resource reuse is still a major limitation for obtaining better cell capacity, especially when the reuse factor is set to "1". Therefore, an efficient radio resource management algorithm needs to be designed to mitigate inter-cell interference.
  • inter-cell interference mitigation methods in traditional cellular networks are being considered: interference randomization, inter-cell interference cancellation, and inter-cell interference coordination (ICIC). Since inter-cell interference randomization does not reduce interference, and inter-cell interference cancellation can only eliminate primary interference, the ICIC strategy that focuses on finding the best effective reuse factor is considered the most promising way and has been implemented in 3GPP. (3rd Generation Partnership Project) LTE (Long Term Evolution) -a has been extensively studied, and this ICIC strategy is often implemented in a coordinated manner by limiting frequency and power allocation.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • FFR Fractional Frequency Reuse
  • the idea of local frequency reuse is to divide the entire frequency band into two parts, one with the reuse factor "1" and the other with the reuse factor "3".
  • the portion of the band in which the reuse factor "3" is used is referred to as the cell edge band, and the other band portion is referred to as the cell center band.
  • Cell edge users are only allowed to use The cell edge band, while the cell center user is allowed to access the cell center band and the cell edge band, but has a lower priority than the edge user.
  • Figure 1 shows an approximate pattern of available sub-bands for a UE in different sectors of one eNB location
  • Figure 2 shows three at the same eNB location. Frequency division of the cell.
  • a relay point in 3GPP LTE-a can help to increase the coverage area or increase the cell throughput compared to 3GPP LTE.
  • the signal to interference and noise ratio (SINR) of the cell edge UE can be significantly improved, and the cell edge arrangement of the RN is not given to the neighboring cell and the local
  • the internal UE introduces a large amount of interference because the RN has a much lower transmit power than the eNB. Therefore, the characteristics of the RN can be utilized to coordinate inter-cell interference by relaying the PFR of the cellular network.
  • an object of the present invention is to provide an apparatus for performing frequency band allocation using frequency reuse in a relay communication system, which can improve reception performance of a cell edge UE.
  • a method for frequency band allocation using frequency reuse in a relay communication system comprising the steps of: dividing system spectrum resources into three cell edge bands and one cell orthogonal to each other a central frequency band; assigning one of the three cell edge frequency bands to a cell edge user terminal within the cell, and allocating a cell center frequency band to a cell center user terminal within the cell and an affiliate relay point of the cell; a cell edge band orthogonal to a cell edge band of the cell and a cell edge band of a neighboring cell of the cell that causes the greatest interference to the cell's secondary relay point in the three cell edge bands Assigned to at least one relay point user terminal served by the affiliate relay point.
  • the method further comprises the steps of: dividing the remaining two small ones of the three cell edge frequency bands orthogonal to the cell edge frequency band allocated to the cell edge user terminal in the cell
  • the zone edge bands are respectively allocated to two cells adjacent to the cell at the same base station location.
  • the cell edge user terminal and the cell center user terminal are user terminals directly served by the base station according to the user geometric distribution, wherein the cell center user terminal is a user terminal of a base station close to the cell, and the cell center UE is close to the cell boundary.
  • the cell center user terminal is a user terminal of a base station close to the cell
  • the cell center UE is close to the cell boundary.
  • the neighboring cell of the cell that causes the greatest interference to the secondary relay point of the cell is a cell covered by a sector that generates primary interference to the secondary relay point and is adjacent to the cell.
  • the frequency reuse is local frequency reuse.
  • the frequency reuse is soft frequency reuse, wherein the cell center frequency band allocated to the cell center user terminal in the cell and the secondary relay point of the cell is reusable and allocated to the same base station location Two cell edge bands of two cells adjacent to the cell.
  • the relay communication system is a 3GPP LTE-a communication system.
  • an apparatus for performing frequency band allocation by using frequency reuse in a relay communication system including: a frequency band dividing apparatus for dividing a system spectrum resource into three orthogonal to each other a cell edge band and a cell center band; a first allocation device, configured to allocate one of the three cell edge bands to a cell edge user terminal in the cell, and allocate a cell center band to a cell in the cell a central user terminal and an adjunct relay point of the cell; and second allocating means, configured to generate a cell edge band of the three cell edge bands and an auxiliary relay point of the cell
  • the cell edge band which is orthogonal to the cell edge band of the neighboring cell of the cell with the largest interference, is allocated to at least one relay point user terminal served by the accessory relay point.
  • the first allocating means allocates, in the three cell edge frequency bands, the remaining two cell edge frequency bands orthogonal to the cell edge frequency band allocated to the cell edge user terminal in the cell to the same base station location Two cells adjacent to the cell.
  • FIG. 2 is a schematic illustration of power and frequency management for local fractional frequency reuse in accordance with the prior art
  • Figure 3 is a schematic illustration of a multi-cell hexagonal layout for local frequency reuse in accordance with the present invention.
  • Figure 4 is a schematic diagram of power and frequency management for local frequency reuse in accordance with the present invention
  • Figure 5 is a flow chart showing a method for frequency band allocation using frequency reuse in a relay communication system in accordance with the present invention
  • Figure 6 is a block diagram showing the configuration of a device for performing band allocation using frequency reuse in a relay communication system
  • Fig. 7 is a comparison diagram of a prior art system frequency simulation result of a local frequency reuse case without a relay point and a local frequency reuse condition with a relay point according to the present invention. detailed description
  • an efficient PFR strategy for a relay enhanced cellular network is presented.
  • the basic idea of the PFR strategy is to coordinate the inter-cell interference of the cell edge users by appropriate resource partitioning, and can be described as follows:
  • the UE directly served by the eNB is classified into a cell center UE and a cell edge UE according to the user geometric distribution, the cell center UE is a UE close to the eNB of the cell, and the cell edge UE is a UE close to the cell boundary.
  • the entire system spectrum resource of each cell can be divided into three cell edge bands and one cell center band. a) The cell center band of each cell reuses the same spectrum resource and is limited to the cell center UE and the cell attached relay point service.
  • the three cell edge bands are orthogonal to each other, and the three cell edge bands are respectively allocated to the cell edge UEs of the three cells covered by the sectors of the three sector cell locations (or eNB locations).
  • the relay band used for the transmission of each RN uses one of the cell edge bands to serve the relay point UE, and is positive with the local cell edge band and the neighbor cell edge band that produces the greatest interference to a given RN cross.
  • the number of UEs associated with the eNB or RN may be adjusted in a semi-static manner depending on the traffic load and the available frequency bands associated with the cell edge band, the cell center band or the relay band, and vice versa.
  • the primary interference to the cell edge UE mainly comes from the neighboring RN having low transmission power. Therefore, these cell edge UEs can obtain better reception performance.
  • the interference for the relay point UE mainly comes from one of the neighboring cells, but since the antenna beam center of the neighboring cell does not point to the RN, the performance of the relay point UE can also be ensured. In this case, better cell average performance can be obtained by spectral reuse between RNs within the sector.
  • the resource partitioning method for how the intra-sector RN uses the adjacent cell edge band for interference coordination, thereby improving the cell edge user performance can be applied to the relay enhanced cellular network using SFR (soft frequency reuse).
  • SFR soft frequency reuse
  • the cell center frequency band allocated to the cell center user terminal in the cell and the secondary relay point of the cell may be reused and allocated to the same base station location.
  • the two cell edge bands of the two cells adjacent to the cell are not orthogonal to the three cell edge bands as shown in FIGS. 3 and 4.
  • Fig. 4 shows an example of frequency division for the PFR policy of the present invention.
  • the entire system spectrum resource of each cell is divided into three orthogonal cell edge bands and one cell center band.
  • each cell edge band occupies 4 PRBs, and only one cell edge band is reserved for the cell edge UE of each cell.
  • the cell center band uses the remaining 38 PRBs to serve only the cell center UE and the cell-affiliated RN.
  • each RN The relay band should avoid strong interference from the cell edge band of the neighboring cell.
  • the relay band of each RN uses one of the unused cell edge bands.
  • the lower portion of Fig. 4 shows the available frequency of each RN that is restricted to be used by the relay point user.
  • the primary interference of RN1 in sector 1A comes from the local cell edge band and the cell edge band used by the cell adjacent to the local cell covered by sector 7B
  • the main interference of RN2 in sector 1A comes from The cell edge band used by the local cell edge band and the cell adjacent to the local cell covered by the sector 3C. Therefore, RN1 in sector 1A uses a cell edge band orthogonal to the cell edge band used by the cell adjacent to the local cell covered by the local cell edge band and sector 7B, and RN2 in sector 1A is used.
  • the cell 'edge UE only receives interference from neighboring Ms. Since the transmit power of the RN is much lower than the transmit power of the eNB, the reception performance of the cell edge UE can be greatly improved.
  • the relay point since the relay point is arranged at the cell edge and serves the relay point UE located at the cell edge on the cell center frequency band, the interference mainly comes from the neighboring cell. However, the antenna beam center of the neighboring cell does not point to the RN, so inter-cell interference from neighboring cells is rather small.
  • the relay point UE will pick up The strong signal from the RN is received, so the reception quality is also improved.
  • the throughput of the cell edge UE can be further improved by spectrum reuse of the intra-sector RN. For internal UEs, the reception quality will not be affected.
  • Figure 5 is a flow chart showing a method of frequency band allocation using frequency reuse in a relay communication system in accordance with the present invention.
  • the system spectrum resources are divided into three cell edge bands and one cell center band which are orthogonal to each other.
  • one of the three cell edge frequency bands is allocated to the cell edge user terminal in the cell, and the cell center frequency band is allocated to the cell center user terminal and the cell attached relay point in the cell.
  • the cell edge frequency band of the neighboring cell of the cell in the three cell edge frequency bands and the cell edge frequency band of the cell and the maximum interference to the auxiliary relay point of the cell are The orthogonal cell edge bands are allocated to at least one relay point user terminal served by the secondary relay point.
  • Fig. 6 is a block diagram showing the configuration of a device for performing band allocation using frequency reuse in a relay communication system.
  • the apparatus comprises: a band dividing means 601, a first distributing means 603 and a second distributing means 605.
  • the band dividing means 601 divides the system spectrum resources into three cell edge bands and one cell center band which are orthogonal to each other.
  • the first assigning means 603 allocates one of the three cell edge frequency bands to the cell edge user terminal in the cell, and allocates the cell center frequency band to the cell center user terminal in the cell and its associated relay point.
  • the second allocating means 605 corrects the cell edge band of the neighboring cell of the cell in the three cell edge bands and the cell edge band of the cell and the interfering relay point of the cell
  • the intersected cell edge band is allocated to at least one relay point user terminal served by the affiliate relay point.
  • the first allocating means 603 divides the remaining two cell edges of the three cell edge bands orthogonal to the cell edge band allocated to the cell edge user terminal in the cell.
  • the fact that the edge bands are respectively assigned to two cells adjacent to the cell at the same base station location is thus visible, and the present invention proposes an efficient PFR method for downlink transmission in a relay enhanced cellular network.
  • the entire frequency band is divided into three cell edge frequency bands and one cell center frequency band from the perspective of the eNB, and the RN arranged at the cell edge can use one of the cell edge frequency bands as a relay frequency band to implement interference. coordination.
  • the cell edge user only allows the use of the cell edge band, while the direct link serving the cell center UE and the relay backhaul link serving the affiliate RN are only allowed to use the cell center band.
  • the relay point UE allows the use of the relay band to serve the relay point UE. Since the inter-cell interference coordination is effectively performed and the characteristics of the relay point are utilized, it can be seen from the simulation results that the present invention can achieve better performance for the cell edge UE in the relay enhanced cellular system.
  • Figure 7 shows the normalized user throughput for the method of the present invention
  • Table 1 below records the corresponding user average and user edge (5%) user throughput and its gain. It can be seen that the cell average and cell edge throughput of the PFR according to the present invention has an increase of 13.22% and 15.75% compared to the conventional cellular system.
  • Table 2 below shows the system level simulation parameters.
  • the honeycomb layout uses a hexagonal layout of wrap a round.
  • each base station eNodeB has 3 zones
  • Downlink HARQ has CC (Chas ing Comb ing , Chase merge ) asynchronous HARQ, maximum triple retransmission, and hop-by-hop HARQ in the relay network
  • Base station eNodeB antenna 1 transmit antenna with antenna mode configured as defined in 3GPP TS 36. 814 VI.5.2
  • the relay point RN antenna is equipped with one transmit antenna and two receive antennas with the antenna mode defined in 3GPP TS 36.814 VI.5.2.
  • the antenna 2 is the receive antenna (0 dBi antenna gain, omnidirectional ) configuration

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

Abstract

The present invention discloses a method for allocating frequency bands by using frequency reuse in a relay communication system, and the method includes steps: dividing the system frequency spectrum resource into three cell edge frequency bands and one cell center frequency band, which are orthogonal with each other; allocating one of the three cell edge frequency bands to the cell edge user terminals in the cell, and allocating the cell center frequency band to the cell center user terminals in the cell and the affiliated relay point of the cell; and allocating the cell edge frequency band, which is orthogonal with both the cell edge frequency band of the cell and the cell edge frequency band of the cell's adjacent cell that brings maximal interference to the affiliated relay point of the cell, of the three cell edge frequency bands to at least one relay point user terminal served by the affiliated relay point.

Description

利用频率重用进行频带分配的方法和设备  Method and apparatus for frequency band allocation using frequency reuse
技术领域  Technical field
本发明涉及移动通信领域, 更具体地, 涉及一种在中继通信系统 中利用频率重用进行频带分配的方法的设备, 能够改善小区边缘用户 终端 (ϋΕ ) 的接收性能。 背景技术  The present invention relates to the field of mobile communications, and more particularly to an apparatus for performing frequency band allocation using frequency reuse in a relay communication system, which can improve reception performance of a cell edge user terminal (ϋΕ). Background technique
在采用跨越不同小区的频率重用的多蜂窝网络中, 当相邻小区将 相同的频率带宽分配给不同的 UE时,会出现小区间干扰。 由于资源重 用而导致的小区间干扰仍然是对获得更好小区容量的主要限制, 特别 是当重用因子被设置为 "1" 时。 因此, 需要设计一种有效的无线资源 管理算法, 以便减轻小区间干扰。  In a multi-cell network employing frequency reuse across different cells, inter-cell interference occurs when neighboring cells allocate the same frequency bandwidth to different UEs. Inter-cell interference due to resource reuse is still a major limitation for obtaining better cell capacity, especially when the reuse factor is set to "1". Therefore, an efficient radio resource management algorithm needs to be designed to mitigate inter-cell interference.
当前, 正在考虑在传统蜂窝网络中的三种主要的小区间干扰减轻 方法: 干扰随机化、 小区间干扰消除、 以及小区间干扰协调 ( ICIC )。 由于小区间干扰随机化不会减小干扰, 并且小区间干扰消除仅能够消 除主千扰,将注意力放在寻找最佳有效重用因子的 ICIC策略被看作最 具前途的方式并且已经在 3GPP (第三代伙伴计划) LTE (长期演进) -a中得到广泛地研究, 该 ICIC策略经常以协调的方式通过对频率和 功率分配的限制来实现。  Currently, three major inter-cell interference mitigation methods in traditional cellular networks are being considered: interference randomization, inter-cell interference cancellation, and inter-cell interference coordination (ICIC). Since inter-cell interference randomization does not reduce interference, and inter-cell interference cancellation can only eliminate primary interference, the ICIC strategy that focuses on finding the best effective reuse factor is considered the most promising way and has been implemented in 3GPP. (3rd Generation Partnership Project) LTE (Long Term Evolution) -a has been extensively studied, and this ICIC strategy is often implemented in a coordinated manner by limiting frequency and power allocation.
另外, 大多数可用的 ICIC策略基于分数频率重用 (FFR )原理。 FFR的突出特征是与小区中心的 UE相比, 向小区边缘 UE分配更高的 频率重用因子, 其中用于相邻小区之间的小区边缘 UE 的频带是正交 的,并且分配给小区中心 UE的频率资源可以仅以与到 eNB(演进 NodeB ) 到小区边缘 ϋΕ传输的功率相比更小的受限功率来重用。作为 FFR的变 体, 在 LTE框架下提出了局部频率重用 (PFR ), 以向性能差的 UE (例 如, 靠近小区边界的 UE )提供更高的速率。 局部频率重用的思想是将 整个频带分割为两个部分, 一个部分采用重用因子 "1", 而另一部分 采用重用因子 " 3"。 将使用重用因子 " 3" 的频带部分称为小区边缘频 带, 而将另一频带部分称为小区中心频带。 小区边缘用户仅允许使用 小区边缘频带, 而小区中心用户允许接入小区中心频带和小区边缘频 带, 但是具有低于边缘用户的优先级。 作为三扇区蜂窝布局中的 PFR 策略的示例,图 1示出了在一个 eNB位置的不同扇区中针对 UE的可用 子频带的近似图案, 而图 2示出了相同 eNB位置处的三个小区的频率 分割。 In addition, most of the available ICIC strategies are based on the Fractional Frequency Reuse (FFR) principle. A prominent feature of FFR is that a higher frequency reuse factor is allocated to a cell edge UE compared to a UE at a cell center, wherein a frequency band for a cell edge UE between adjacent cells is orthogonal and allocated to a cell center UE The frequency resources may be reused only with less limited power compared to the power transmitted by the eNB (Evolved NodeB) to the cell edge. As a variant of FFR, local frequency reuse (PFR) is proposed under the LTE framework to provide higher rates to poorly performing UEs (e.g., UEs close to cell boundaries). The idea of local frequency reuse is to divide the entire frequency band into two parts, one with the reuse factor "1" and the other with the reuse factor "3". The portion of the band in which the reuse factor "3" is used is referred to as the cell edge band, and the other band portion is referred to as the cell center band. Cell edge users are only allowed to use The cell edge band, while the cell center user is allowed to access the cell center band and the cell edge band, but has a lower priority than the edge user. As an example of a PFR policy in a three-sector cellular layout, Figure 1 shows an approximate pattern of available sub-bands for a UE in different sectors of one eNB location, while Figure 2 shows three at the same eNB location. Frequency division of the cell.
由于在 3GPP LTE-a中引入中继点 ( RN ) 与 3GPP LTE相比能够有 助于增大覆盖区或者增加小区吞吐量。 在 RN 的小区边缘布置的情况 下, 当小区边缘 UE直接由 RN服务时, 小区边缘 UE的信号与干扰噪声 比( SINR )可以显著提高, 而且 RN的小区边缘布置不会给相邻小区和 本地的内部 UE引入大量干扰, 这是因为 RN与 eNB相比具有低得多的 发射功率。 因此, 可以利用 RN的特征, 以便通过中继增强蜂窝网絡的 PFR来协调小区间干扰。尽管先前的大多数 ICIC研究仍然将注意力放 在传统蜂窝网络, 但是需要设计一种针对中继增强蜂窝网络的有效 PFR策略。 发明内容  Since the introduction of a relay point (RN) in 3GPP LTE-a can help to increase the coverage area or increase the cell throughput compared to 3GPP LTE. In the case of the cell edge arrangement of the RN, when the cell edge UE is directly served by the RN, the signal to interference and noise ratio (SINR) of the cell edge UE can be significantly improved, and the cell edge arrangement of the RN is not given to the neighboring cell and the local The internal UE introduces a large amount of interference because the RN has a much lower transmit power than the eNB. Therefore, the characteristics of the RN can be utilized to coordinate inter-cell interference by relaying the PFR of the cellular network. Although most of the previous ICIC studies have focused on traditional cellular networks, an effective PFR strategy for relay-enhanced cellular networks needs to be designed. Summary of the invention
为了克服现有技术的上述缺陷, 提出了本发明。 因此, 本发明的 目的是提出一种在中继通信系统中利用频率重用进行频带分配的方法 的设备, 能够改善小区边缘 UE的接收性能。  In order to overcome the above drawbacks of the prior art, the present invention has been made. Accordingly, an object of the present invention is to provide an apparatus for performing frequency band allocation using frequency reuse in a relay communication system, which can improve reception performance of a cell edge UE.
为了实现上述目的, 稂据本发明, 提出了一种在中继通信系统中 利用频率重用进行频带分配的方法, 包括步驟: 将系统频谱资源划分 为彼此正交的三个小区边缘频带和一个小区中心频带; 将所述三个小 区边缘频带之一分配给小区内的小区边缘用户终端, 并且将小区中心 频带分配给所述小区内的小区中心用户终端和所述小区的附属中继 点; 以及将所述三个小区边缘频带中与所述小区的小区边缘频带、 以 及对所述小区的附属中继点产生最大干扰的所述小区的相邻小区的小 区边缘频带均正交的小区边缘频带分配给由所述附属中继点服务的至 少一个中继点用户终端。  In order to achieve the above object, according to the present invention, a method for frequency band allocation using frequency reuse in a relay communication system is proposed, comprising the steps of: dividing system spectrum resources into three cell edge bands and one cell orthogonal to each other a central frequency band; assigning one of the three cell edge frequency bands to a cell edge user terminal within the cell, and allocating a cell center frequency band to a cell center user terminal within the cell and an affiliate relay point of the cell; a cell edge band orthogonal to a cell edge band of the cell and a cell edge band of a neighboring cell of the cell that causes the greatest interference to the cell's secondary relay point in the three cell edge bands Assigned to at least one relay point user terminal served by the affiliate relay point.
优选地, 所述方法还包括步骤: 将所述三个小区边缘频带中与已 分配给小区内的小区边缘用户终端的小区边缘频带正交的其余两个小 区边缘频带分别分配给相同基站位置处的与所述小区相邻的两个小 区。 Preferably, the method further comprises the steps of: dividing the remaining two small ones of the three cell edge frequency bands orthogonal to the cell edge frequency band allocated to the cell edge user terminal in the cell The zone edge bands are respectively allocated to two cells adjacent to the cell at the same base station location.
优选地, 小区边缘用户终端和小区中心用户终端是根据用户几何 分布分类的由基站直接提供服务的用户终端, 其中小区中心用户终端 是靠近小区的基站的用户终端,而小区中心 UE是靠近小区边界的用户 终端。  Preferably, the cell edge user terminal and the cell center user terminal are user terminals directly served by the base station according to the user geometric distribution, wherein the cell center user terminal is a user terminal of a base station close to the cell, and the cell center UE is close to the cell boundary. User terminal.
优选地, 对所述小区的附属中继点产生最大干扰的所述小区的相 邻小区是由对所述附属中继点产生主干扰的扇区所覆盖且与所述小区 相邻的小区。  Preferably, the neighboring cell of the cell that causes the greatest interference to the secondary relay point of the cell is a cell covered by a sector that generates primary interference to the secondary relay point and is adjacent to the cell.
优选地, 所述频率重用是局部频率重用。  Preferably, the frequency reuse is local frequency reuse.
优选地, 所述频率重用是软频率重用, 其中分配给所述小区内的 小区中心用户终端和所述小区的附属中继点的所述小区中心频带可重 用分配给相同基站位置处的与所述小区相邻的两个小区的两个小区边 缘频带。  Preferably, the frequency reuse is soft frequency reuse, wherein the cell center frequency band allocated to the cell center user terminal in the cell and the secondary relay point of the cell is reusable and allocated to the same base station location Two cell edge bands of two cells adjacent to the cell.
优选地, 所述中继通信系统是 3GPP LTE-a通信系统。  Preferably, the relay communication system is a 3GPP LTE-a communication system.
另外, 为了实现上述目的, 根据本发明, 还提出了一种在中继通 信系统中利用频率重用进行频带分配的设备, 包括: 频带划分装置, 用于将系统频谱资源划分为彼此正交的三个小区边缘频带和一个小区 中心频带; 第一分配装置, 用于将所述三个小区边缘频带之一分配给 小区内的小区边缘用户终端, 并且将小区中心频带分配给所述小区内 的小区中心用户终端和所述小区的附属中继点; 以及第二分配装置, 用于将所述三个小区边缘频带中与所述小区的小区边缘频带、 以及对 所述小区的附属中继点产生最大干扰的所述小区的相邻小区的小区边 缘频带均正交的小区边缘频带分配给由所述附属中继点服务的至少一 个中继点用户终端。  In addition, in order to achieve the above object, according to the present invention, an apparatus for performing frequency band allocation by using frequency reuse in a relay communication system is further provided, including: a frequency band dividing apparatus for dividing a system spectrum resource into three orthogonal to each other a cell edge band and a cell center band; a first allocation device, configured to allocate one of the three cell edge bands to a cell edge user terminal in the cell, and allocate a cell center band to a cell in the cell a central user terminal and an adjunct relay point of the cell; and second allocating means, configured to generate a cell edge band of the three cell edge bands and an auxiliary relay point of the cell The cell edge band, which is orthogonal to the cell edge band of the neighboring cell of the cell with the largest interference, is allocated to at least one relay point user terminal served by the accessory relay point.
优选地, 所述第一分配装置将所述三个小区边缘频带中与已分配 给小区内的小区边缘用户终端的小区边缘频带正交的其余两个小区边 缘频带分别分配给相同基站位置处的与所述小区相邻的两个小区。 附图说明 根据以下结合附图对本发明非限制实施例的详细描述, 本发明的 以上和其他目的、 特征和优点将变得更加清楚, 其中: Preferably, the first allocating means allocates, in the three cell edge frequency bands, the remaining two cell edge frequency bands orthogonal to the cell edge frequency band allocated to the cell edge user terminal in the cell to the same base station location Two cells adjacent to the cell. DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the Detailed Description of Description
图 1是根据现有技术的局部分数频率重用的示意图;  1 is a schematic diagram of local fractional frequency reuse in accordance with the prior art;
图 2是根据现有技术的局部分数频率重用的功率和频率管理的示 意图;  2 is a schematic illustration of power and frequency management for local fractional frequency reuse in accordance with the prior art;
图 3 是根据本发明的局部频率重用的多小区六角形布局的示意 图;  Figure 3 is a schematic illustration of a multi-cell hexagonal layout for local frequency reuse in accordance with the present invention;
图 4是根据本发明的局部频率重用的功率和频率管理的示意图; 图 5是示出了根据本发明的在中继通信系统中利用频率重用进行 频带分配的方法的流程图;  Figure 4 is a schematic diagram of power and frequency management for local frequency reuse in accordance with the present invention; Figure 5 is a flow chart showing a method for frequency band allocation using frequency reuse in a relay communication system in accordance with the present invention;
图 6是示出了在中继通信系统中利用频率重用进行频带分配的设 备的结构方框图; 以及  Figure 6 is a block diagram showing the configuration of a device for performing band allocation using frequency reuse in a relay communication system;
图 7是现有技术的没有中继点的局部频率重用情况与根据本发明 的具有中继点的局部频率重用情况的系统仿真结果的比较图。 具体实施方式  Fig. 7 is a comparison diagram of a prior art system frequency simulation result of a local frequency reuse case without a relay point and a local frequency reuse condition with a relay point according to the present invention. detailed description
下面, 将根据附图描述本发明。 在以下描述中, 一些具体的实施 例只用于描述的目的, 不应该将其理解为对于本发明的任何限制, 而 只是示例。 当可能导致使本发明的理解发生模糊时, 将省略传统结构 或构造。  Hereinafter, the present invention will be described based on the drawings. In the following description, some specific embodiments are for illustrative purposes only and should not be construed as limiting the invention. Conventional structures or configurations will be omitted when it may result in obscuring the understanding of the present invention.
根据本发明,提出了一种针对中继增强蜂窝网络的有效 PFR策略。 该 PFR策略的基本思想是通过适当 '的资源分割来协调小区边缘用户的 小区间干扰, 并且可以如下筒要描述:  In accordance with the present invention, an efficient PFR strategy for a relay enhanced cellular network is presented. The basic idea of the PFR strategy is to coordinate the inter-cell interference of the cell edge users by appropriate resource partitioning, and can be described as follows:
1 )首先, 在蜂窝网络中的所有 M布置在小区的边缘以扩展覆盖 区, 这里, 将 RN直接服务的 UE称为中继点 ϋΕ。  1) First, all Ms in the cellular network are placed at the edge of the cell to extend the coverage area. Here, the UE directly served by the RN is referred to as a relay point ϋΕ.
2 ) 然后, 将 eNB直接服务的 UE根据用户几何分布分类为小区中 心 UE和小区边缘 UE , 小区中心 UE是靠近小区的 eNB的 UE , 而小区边 缘 UE是靠近小区边界的 UE。  2) Then, the UE directly served by the eNB is classified into a cell center UE and a cell edge UE according to the user geometric distribution, the cell center UE is a UE close to the eNB of the cell, and the cell edge UE is a UE close to the cell boundary.
3 )每一个小区的整个系统频谱资源可以划分为三个小区边缘频 带和一个小区中心频带。 a )每一个小区的小区中心频带重用相同的频谱资源且被限制为 小区中心 UE和所述小区附属中继点服务。 3) The entire system spectrum resource of each cell can be divided into three cell edge bands and one cell center band. a) The cell center band of each cell reuses the same spectrum resource and is limited to the cell center UE and the cell attached relay point service.
b ) 三个小区边缘频带彼此正交, 并且三个小区边缘频带被分别 分配给三扇区小区位置 (或者 eNB位置) 的各扇区所覆盖的三个小区 的小区边缘 UE。  b) The three cell edge bands are orthogonal to each other, and the three cell edge bands are respectively allocated to the cell edge UEs of the three cells covered by the sectors of the three sector cell locations (or eNB locations).
c )用作每一个 RN的传输的中继频带使用小区边缘频带之一来为 中继点 UE服务, 并且与本地小区边缘频带、 以及对给定 RN产生最大 干扰的相邻小区边缘频带均正交。  c) that the relay band used for the transmission of each RN uses one of the cell edge bands to serve the relay point UE, and is positive with the local cell edge band and the neighbor cell edge band that produces the greatest interference to a given RN cross.
4 ) eNB或者 RN所关联的 UE的数量可以根据业务量负载和与小区 边缘频带、 小区中心频带或中继频带相关的可用频带, 以半静态的方 式来调节, 反之亦然。  4) The number of UEs associated with the eNB or RN may be adjusted in a semi-static manner depending on the traffic load and the available frequency bands associated with the cell edge band, the cell center band or the relay band, and vice versa.
由于用于相邻小区的小区边缘频带与本小区的小区边缘 UE使用 的小区边缘频带正交,对小区边缘 UE的主干扰主要来自于具有低发射 功率的相邻 RN。 因此, 这些小区边缘 UE可以获得更好接收性能。  Since the cell edge band for the neighboring cell is orthogonal to the cell edge band used by the cell edge UE of the own cell, the primary interference to the cell edge UE mainly comes from the neighboring RN having low transmission power. Therefore, these cell edge UEs can obtain better reception performance.
另外, 针对中继点 UE 的干扰主要来自于相邻小区之一, 但是由 于相邻小区的天线波束中心并不指向 RN, 因此,也可以确保中继点 UE 的性能。在这种情况下,可以通过扇区内 RN之间的频谱重用来获得更 好的小区平均性能。  In addition, the interference for the relay point UE mainly comes from one of the neighboring cells, but since the antenna beam center of the neighboring cell does not point to the RN, the performance of the relay point UE can also be ensured. In this case, better cell average performance can be obtained by spectral reuse between RNs within the sector.
以上仅以局部频率重用为例描述了本发明。 但是, 本发明并不局 限于此。类似地,针对扇区内 RN如何采用相邻小区边缘频带进行干扰 协调, 从而提高小区边缘用户性能的资源划分方法可以应用到采用 SFR (软频率重用)的中继增强蜂窝网络中。 与局部频率重用不同, 在 软频率重用的情况下, 分配给所述小区内的小区中心用户终端和所述 小区的附属中继点的所述小区中心频带可重用分配给相同基站位置处 的与所述小区相邻的两个小区的两个小区边缘频带, 而并不如图 3和 图 4所示那样与三个小区边缘频带均正交。  The above description has been made by taking only local frequency reuse as an example. However, the present invention is not limited to this. Similarly, the resource partitioning method for how the intra-sector RN uses the adjacent cell edge band for interference coordination, thereby improving the cell edge user performance, can be applied to the relay enhanced cellular network using SFR (soft frequency reuse). Different from local frequency reuse, in the case of soft frequency reuse, the cell center frequency band allocated to the cell center user terminal in the cell and the secondary relay point of the cell may be reused and allocated to the same base station location. The two cell edge bands of the two cells adjacent to the cell are not orthogonal to the three cell edge bands as shown in FIGS. 3 and 4.
这里, 将提出本发明的方案的简单实施例, 其中采用 LTE FDD下 行传输作为示例。 在每一个小区中, 2个位置固定的 RN以如图 3所示 的位置布置在小区边缘。  Here, a simple embodiment of the solution of the present invention will be proposed in which LTE FDD downlink transmission is employed as an example. In each cell, two fixed RNs are arranged at the cell edge in the position shown in Fig. 3.
这里, 假定在每一个小区均匀分布了平均 25个 UE, 由于采用了 灵活 UE接入方式, 将有 24 %的 UE接入到这个两个 RN。 此外, 将具有 最小接收功率的 3个 UE假定为小区边缘 UE,则剩余 UE被假定为小区 中心 UE。 Here, it is assumed that an average of 25 UEs are evenly distributed in each cell, due to the adoption With flexible UE access, 24% of UEs will access the two RNs. Furthermore, the 3 UEs with the smallest received power are assumed to be cell edge UEs, and the remaining UEs are assumed to be cell center UEs.
对于具有 1 0MHz系统带宽的一个典型 LTE-a系统而言, 在每一个 子帧内存在总共 50个 PRB (物理资源块)。 图 4示出了针对本发明的 PFR 策略的频率分割的示例。 将每一个小区的整个系统频谱资源划分 为三个正交的小区边缘频带和一个小区中心频带。 这里, 每一个小区 边缘频带占用 4个 PRB, 并且仅一个小区边缘频带被预留给每一个小 区的小区边缘 UE。 另外, 小区中心频带使用剩余的 38个 PRB , 用来仅 为小区中心 UE和所述小区附属 RN服务。  For a typical LTE-a system with a 10 MHz system bandwidth, there are a total of 50 PRBs (physical resource blocks) in each subframe. Fig. 4 shows an example of frequency division for the PFR policy of the present invention. The entire system spectrum resource of each cell is divided into three orthogonal cell edge bands and one cell center band. Here, each cell edge band occupies 4 PRBs, and only one cell edge band is reserved for the cell edge UE of each cell. In addition, the cell center band uses the remaining 38 PRBs to serve only the cell center UE and the cell-affiliated RN.
如图 3的多小区布置所示, 扇区 3C、 5A和 7B是对 eNBl的 RN中 的一个具有最大干扰的扇区 (由于其天线波束中心是指向所述小区 的), 因此, 每一个 RN的中继频带应该避免来自相邻小区的小区边缘 频带的强干扰。 另外, 为了避免来自本地小区的小区内干扰, 每一个 RN的中继频带使用未用的小区边缘频带之一。 在这种情况下, 图 4的 下部示出了被限制为由中继点用户使用的每一个 RN 的可用频谙。 例 如, 扇区 1A中的 RN1的主干扰来自于本地小区边缘频带和扇区 7B所 覆盖的与本地小区相邻的小区所使用的小区边缘频带,而扇区 1A中的 RN2的主干扰来自于本地小区边缘频带和扇区 3C所覆盖的与本地小区 相邻的小区所使用的小区边缘频带。 因此,扇区 1A中的 RN1使用与本 地小区边缘频带和扇区 7B 所覆盖的与本地小区相邻的小区所使用的 小区边缘频带均正交的小区边缘频带,而扇区 1A中的 RN2使用与本地 小区边缘频带和扇区 3C 所覆盖的与本地小区相邻的小区所使用的小 区边缘频带均正交的小区边缘频带。  As shown in the multi-cell arrangement of Figure 3, sectors 3C, 5A and 7B are sectors with the greatest interference to one of the RNs of eNB1 (since their antenna beam center is directed to the cell), therefore, each RN The relay band should avoid strong interference from the cell edge band of the neighboring cell. In addition, in order to avoid intra-cell interference from the local cell, the relay band of each RN uses one of the unused cell edge bands. In this case, the lower portion of Fig. 4 shows the available frequency of each RN that is restricted to be used by the relay point user. For example, the primary interference of RN1 in sector 1A comes from the local cell edge band and the cell edge band used by the cell adjacent to the local cell covered by sector 7B, and the main interference of RN2 in sector 1A comes from The cell edge band used by the local cell edge band and the cell adjacent to the local cell covered by the sector 3C. Therefore, RN1 in sector 1A uses a cell edge band orthogonal to the cell edge band used by the cell adjacent to the local cell covered by the local cell edge band and sector 7B, and RN2 in sector 1A is used. A cell edge band that is orthogonal to the cell edge band used by the cell adjacent to the local cell covered by the local cell edge band and the sector 3C.
对于以上频率资源分配,小区'边缘 UE仅接收来自相邻 M的干扰。 由于 RN的发射功率远低于 eNB的发射功率,因此可以极大地提高小区 边缘 UE的接收性能。另一方面, 由于中继点布置在小区边缘且在小区 中心频带上为位于小区边缘处的中继点 UE服务,因此其干扰主要来自 于相邻小区。 但是, 相邻小区的天线波束中心并不指向该 RN , 因此来 自相邻小区的小区间干扰相当小。 另外, 由于距离短, 中继点 UE将接 收来自 RN的强信号, 因而其接收质量也会得到提高。 另外, 通过扇区 内 RN的频谱重用, 能够进一步改善小区边缘 UE的吞吐量。 对于内部 UE, 其接收质量将不受影响。 For the above frequency resource allocation, the cell 'edge UE only receives interference from neighboring Ms. Since the transmit power of the RN is much lower than the transmit power of the eNB, the reception performance of the cell edge UE can be greatly improved. On the other hand, since the relay point is arranged at the cell edge and serves the relay point UE located at the cell edge on the cell center frequency band, the interference mainly comes from the neighboring cell. However, the antenna beam center of the neighboring cell does not point to the RN, so inter-cell interference from neighboring cells is rather small. In addition, because the distance is short, the relay point UE will pick up The strong signal from the RN is received, so the reception quality is also improved. In addition, the throughput of the cell edge UE can be further improved by spectrum reuse of the intra-sector RN. For internal UEs, the reception quality will not be affected.
图 5是示出了根据本发明的在中继通信系统中利用频率重用进行 频带分配的方法的流程图。  Figure 5 is a flow chart showing a method of frequency band allocation using frequency reuse in a relay communication system in accordance with the present invention.
如图 5所示, 根据本发明的方法, 在步骤 501, 将系统频谱资源 划分为彼此正交的三个小区边缘频带和一个小区中心频带。 然后, 在 步骤 503 , 将所述三个小区边缘频带之一分配给小区内的小区边缘用 户终端, 并且将小区中心频带分配给所述小区内的小区中心用户终端 和所述小区附属中继点。 之后, 在步骤 505 , 将所述三个小区边缘频 带中与所述小区的小区边缘频带、 以及对所述小区的附属中继点产生 最大干扰的所述小区的相邻小区的小区边缘频带均正交的小区边缘频 带分配给由所述附属中继点服务的至少一个中继点用户终端。  As shown in FIG. 5, according to the method of the present invention, in step 501, the system spectrum resources are divided into three cell edge bands and one cell center band which are orthogonal to each other. Then, in step 503, one of the three cell edge frequency bands is allocated to the cell edge user terminal in the cell, and the cell center frequency band is allocated to the cell center user terminal and the cell attached relay point in the cell. . Then, in step 505, the cell edge frequency band of the neighboring cell of the cell in the three cell edge frequency bands and the cell edge frequency band of the cell and the maximum interference to the auxiliary relay point of the cell are The orthogonal cell edge bands are allocated to at least one relay point user terminal served by the secondary relay point.
另外, 在步骤 503 , 可以将所述三个小区边缘频带中与已分配给 小区内的小区边缘用户终端的小区边缘频带正交的其余两个小区边缘 频带分别分配给相同基站位置处的与所述小区相邻的两个小区。 图 6是示出了在中继通信系统中利用频率重用进行频带分配的设 备的结构方框图。  In addition, in step 503, the remaining two cell edge bands in the three cell edge bands that are orthogonal to the cell edge band allocated to the cell edge user terminal in the cell may be respectively allocated to the same base station location. Two cells adjacent to the cell are described. Fig. 6 is a block diagram showing the configuration of a device for performing band allocation using frequency reuse in a relay communication system.
如图 6所示, 根据本发明的设备包括: 频带划分装置 601、 第一 分配装置 603和第二分配装置 605。 频带划分装置 601将系统频谱资 源划分为彼此正交的三个小区边缘频带和一个小区中心频带。 第一分 配装置 603将所述三个小区边缘频带之一分配给小区内的小区边缘用 户终端, 并且将小区中心频带分配给所迷小区内的小区中心用户终端 和其附属的中继点。 第二分配装置 605将所述三个小区边缘频带中与 所述小区的小区边缘频带、 以及对所述小区的附属中继点产生最大干 扰的所述小区的相邻小区的小区边缘频带均正交的小区边缘频带分配 给由所述附属中继点服务的至少一个中继点用户终端。  As shown in Fig. 6, the apparatus according to the present invention comprises: a band dividing means 601, a first distributing means 603 and a second distributing means 605. The band dividing means 601 divides the system spectrum resources into three cell edge bands and one cell center band which are orthogonal to each other. The first assigning means 603 allocates one of the three cell edge frequency bands to the cell edge user terminal in the cell, and allocates the cell center frequency band to the cell center user terminal in the cell and its associated relay point. The second allocating means 605 corrects the cell edge band of the neighboring cell of the cell in the three cell edge bands and the cell edge band of the cell and the interfering relay point of the cell The intersected cell edge band is allocated to at least one relay point user terminal served by the affiliate relay point.
另外, 该第一分配装置 603将所述三个小区边缘频带中与已分配 给小区内的小区边缘用户终端的小区边缘频带正交的其余两个小区边 缘频带分别分配给相同基站位置处的与所述小区相邻的两个小区 由此可见, 本发明提出了针对中继增强蜂窝网络中的下行传输的 有效 PFR方法。 根据本发明的策略, 从 eNB的角度, 将整个频带分割 为三个小区边缘频带和一个小区中心频带, 并且在小区边缘布置的 RN 能够将小区边缘频带之一用作中继频带, 以实现干扰协调。 这里, 小 区边缘用户仅允许使用小区边缘频带,而为小区中心 UE服务的直接链 路和为附属 RN服务的中继回程链路只允许使用小区中心频带。 同时, 中继点 UE允许使用中继频带来为中继点 UE服务。 由于有效地进行了小区间干扰协调和利用了中继点的特征, 从仿 真结果可以看出本发明能够为中继增强的蜂窝系统中的小区边缘 UE 实现更好的性能。 In addition, the first allocating means 603 divides the remaining two cell edges of the three cell edge bands orthogonal to the cell edge band allocated to the cell edge user terminal in the cell. The fact that the edge bands are respectively assigned to two cells adjacent to the cell at the same base station location is thus visible, and the present invention proposes an efficient PFR method for downlink transmission in a relay enhanced cellular network. According to the strategy of the present invention, the entire frequency band is divided into three cell edge frequency bands and one cell center frequency band from the perspective of the eNB, and the RN arranged at the cell edge can use one of the cell edge frequency bands as a relay frequency band to implement interference. coordination. Here, the cell edge user only allows the use of the cell edge band, while the direct link serving the cell center UE and the relay backhaul link serving the affiliate RN are only allowed to use the cell center band. At the same time, the relay point UE allows the use of the relay band to serve the relay point UE. Since the inter-cell interference coordination is effectively performed and the characteristics of the relay point are utilized, it can be seen from the simulation results that the present invention can achieve better performance for the cell edge UE in the relay enhanced cellular system.
图 7示出了本发明的方法的归一化用户吞吐量, 并且下表 1记录 了相应的用户平均和用户边缘(5 % )用户吞吐量和其增益。可以看出, 与传统蜂窝系统相比, 根据本发明的 PFR的小区平均和小区边缘吞吐 量具有 1 3. 22 %和 15. 75 %的增加。  Figure 7 shows the normalized user throughput for the method of the present invention, and Table 1 below records the corresponding user average and user edge (5%) user throughput and its gain. It can be seen that the cell average and cell edge throughput of the PFR according to the present invention has an increase of 13.22% and 15.75% compared to the conventional cellular system.
表 1 : 频率重用的系统仿真结果  Table 1: System Simulation Results for Frequency Reuse
Figure imgf000010_0001
Figure imgf000010_0001
另外, 下表 2示出了系统级仿真参数。  In addition, Table 2 below shows the system level simulation parameters.
表 2 系统级仿真参数  Table 2 System level simulation parameters
参数 值  Parameter value
蜂窝布局 采用环绕( wrap a round )的六角形布局,  The honeycomb layout uses a hexagonal layout of wrap a round.
7个基站 eNodeB ,每个基站 eNodeB有 3个小 区  7 base stations eNodeB, each base station eNodeB has 3 zones
系统带宽 1 0MHz , 下行链路 ISD (Inter-s i te 500 m (3GPP Casel) System bandwidth 10 MHz, downlink ISD (Inter-s i te 500 m (3GPP Casel)
di s tance , 基站间的 巨 Di s tance , the giant between base stations
离) Leaving)
基站 eNodeB功率 46 dBm  Base station eNodeB power 46 dBm
中继点 RN 功率 30 dBm  Relay point RN power 30 dBm
每个小区的中继点 2  Relay point 2 per cell
RN数目 Number of RNs
每个小区的用户终 25  User end of each cell 25
端 UE数目 Number of UEs
调度策略 增强的比例公平调度策略  Scheduling strategy Enhanced proportional fair scheduling strategy
调度延迟 6ms  Scheduling delay 6ms
调度粒度 5RB  Scheduling granularity 5RB
下行链路 HARQ 具有 CC( Chas ing Comb ing , Chase合并 ) 的异步 HARQ, 最大三次重传, 以及中继网络 中的逐跳 HARQ  Downlink HARQ has CC (Chas ing Comb ing , Chase merge ) asynchronous HARQ, maximum triple retransmission, and hop-by-hop HARQ in the relay network
信道模型 针对 3GPPCasel的宏小区的高频 SCM信 道模型  Channel Model High Frequency SCM Channel Model for 3GPPCasel Macrocell
基站 eNodeB 天线 具有在 3GPP TS 36. 814 VI. 5. 2中定义 配置 的天线模式的 1根发射天线  Base station eNodeB antenna 1 transmit antenna with antenna mode configured as defined in 3GPP TS 36. 814 VI.5.2
中继点 RN 天线配 具有在 3GPP TS 36. 814 VI. 5. 2中定义 的天线模式的 1根发射天线和 2根接收天线 用户终端 UE 天线 2才艮接收天线 ( 0 dBi天线增益, 全向) 配置  The relay point RN antenna is equipped with one transmit antenna and two receive antennas with the antenna mode defined in 3GPP TS 36.814 VI.5.2. The antenna 2 is the receive antenna (0 dBi antenna gain, omnidirectional ) configuration
下行接收机类型 癒 C (最大比合并)  Downstream receiver type C (maximum ratio merge)
路径损耗模型 同 3GPP TS 36. 814 VI. 5. 2  Path loss model with 3GPP TS 36. 814 VI. 5. 2
业务量模型 全緩冲 Ful l Buf fer  Traffic model Fully buffered Ful l Buf fer
控制信道开销、 ACK LTE: L=3个符号或者 DL CCH, 针对解调 等 参考信号的开销 以上实施例只是用于示例目的, 并不倾向于限制本发明。 本领域 普通技术人员应该理解的是,在不脱离本发明的范围和精神的情况下, 可以存在对该实施例的各种修改和代替, 并且这些修改和代替落在所 附权利要求所限定的范围中。 Control Channel Overhead, ACK LTE: L = 3 symbols or DL CCH, overhead for reference signals such as demodulation The above embodiments are for illustrative purposes only and are not intended to limit the invention. Field A person skilled in the art should understand that various modifications and substitutions to the embodiments may be made without departing from the scope and spirit of the invention. .

Claims

权 利 要 求 书 Claim
1、 一种在中继通信系统中利用频率重用进行频带分配的方法, 包括步驟: A method for frequency band allocation using frequency reuse in a relay communication system, comprising the steps of:
将系统频谱资源划分为彼此正交的三个小区边缘频带和一个小 区中心频带;  Dividing system spectrum resources into three cell edge bands and one cell center band that are orthogonal to each other;
将所述三个小区边缘频带之一分配给小区内的小区边缘用户终 端, 并且将小区中心频带分配给所述小区内的小区中心用户终端和所 述小区的附属中继点; 以及  Assigning one of the three cell edge frequency bands to a cell edge user terminal within the cell, and allocating the cell center frequency band to the cell center user terminal within the cell and an attached relay point of the cell;
将所述三个小区边缘频带中与所述小区的小区边缘频带、 以及对 所述小区的附属中继点产生最大干扰的所述小区的相邻小区的小区边 缘频带均正交的小区边缘频带分配给由所述附属中继点服务的至少一 个中继点用户终端。  a cell edge band orthogonal to a cell edge band of the cell and a cell edge band of a neighboring cell of the cell that causes the greatest interference to the cell's secondary relay point in the three cell edge bands Assigned to at least one relay point user terminal served by the affiliate relay point.
2、 根据权利要求 1所述的方法, 其中还包括步骤:  2. The method of claim 1 further comprising the step of:
将所述三个小区边缘频带中与已分配给小区内的小区边缘用户 终端的小区边缘频带正交的其余两个小区边缘频带分别分配给相同基 站位置处的与所述小区相邻的两个小区。  Allocating the remaining two cell edge bands of the three cell edge bands orthogonal to the cell edge band allocated to the cell edge user terminal in the cell to two adjacent to the cell at the same base station location Community.
3、 根据权利要求 1 所述的方法, 其中小区边缘用户终端和小区 中心用户终端是根据用户几何分布分类的由基站直接提供服务的用户 终端, 其中小区中心用户终端是靠近小区的基站的用户终端, 而小区 中心 UE是靠近小区边界的用户终端。  3. The method according to claim 1, wherein the cell edge user terminal and the cell center user terminal are user terminals directly served by the base station according to the user geometric distribution, wherein the cell center user terminal is a user terminal of the base station close to the cell. And the cell center UE is a user terminal close to the cell boundary.
4、 根据权利要求 1 所述的方法, 其中对所述小区的附属中继点 产生最大干扰的所述小区的相邻小区是由对所述附属中继点产生主干 扰的扇区所覆盖且与所述小区相邻的小区。  4. The method according to claim 1, wherein a neighboring cell of the cell that generates the greatest interference to an affiliate relay point of the cell is covered by a sector that generates primary interference to the secondary relay point and a cell adjacent to the cell.
5、 根据权利要求 1 所述的方法, 其中所述频率重用是局部频率 重用。  5. The method of claim 1 wherein the frequency reuse is local frequency reuse.
6、 根据权利要求 1 所述的方法, 其中所述频率重用是软频率重 用, 其中分配给所述小区内的小区中心用户终端和所述小区的附属中 继点的所述小区中心频带可重用分配给相同基站位置处的与所述小区 相邻的两个小区的两个小区边缘频带。 6. The method according to claim 1, wherein the frequency reuse is soft frequency reuse, wherein the cell center frequency band allocated to a cell center user terminal in the cell and an affiliate relay point of the cell is reusable Two cell edge bands allocated to two cells adjacent to the cell at the same base station location.
7、 根据权利要求 1所述的方法, 其中所述中继通信系统是 3GPP LTE-a通信系统。 7. The method of claim 1, wherein the relay communication system is a 3GPP LTE-a communication system.
8、 一种在中继通信系统中利用频率重用进行频带分配的设备, 包括:  8. A device for frequency band allocation using frequency reuse in a relay communication system, comprising:
频带划分装置, 用于将系统频谱资源划分为彼此正交的三个小区 边缘频带和一个小区中心频带;  a frequency band dividing device, configured to divide system spectrum resources into three cell edge frequency bands and one cell center frequency band that are orthogonal to each other;
第一分配装置, 用于将所述三个小区边缘频带之一分配给小区内 的小区边缘用户终端, 并且将小区中心频带分配给所述小区内的小区 中心用户终端和所述小区的附属中继点; 以及  a first allocation device, configured to allocate one of the three cell edge frequency bands to a cell edge user terminal in the cell, and allocate a cell center frequency band to a cell center user terminal in the cell and an accessory in the cell Following; and
第二分配装置, 用于将所述三个小区边缘频带中与所述小区的小 区边缘频带、 以及对所迷小区的附属中继点产生最大干扰的所述小区 的相邻小区的小区边缘频带均正交的小区边缘频带分配给由所述附属 中继点服务的至少一个中继点用户终端。  a second allocation device, configured to: in a cell edge band of the three cell edge bands, a cell edge band of the cell, and a cell edge band of a neighboring cell of the cell that causes maximum interference to an auxiliary relay point of the cell The equally orthogonal cell edge bands are allocated to at least one relay point user terminal served by the secondary relay point.
9、 根据权利要求 8 所述的设备, 其中所述第一分配装置将所述 三个小区边缘频带中与已分配给小区内的小区边缘用户终端的小区边 缘频带正交的其余两个小区边缘频带分别分配给相同基站位置处的与 所述小区相邻的两个小区。  9. The apparatus according to claim 8, wherein said first allocating means divides the remaining two cell edges of said three cell edge bands orthogonal to cell edge bands allocated to cell edge user terminals within a cell The frequency bands are respectively allocated to two cells adjacent to the cell at the same base station location.
1 0、 根据权利要求 8所述的设备, 其中小区边缘用户终端和小区 中心用户终端是根据用户几何分布分类的由基站直接提供服务的用户 终端, 其中小区中心用户终端是靠近小区的基站的用户终端, 而小区 中心 UE是靠近小区边界的用户终端。  The device according to claim 8, wherein the cell edge user terminal and the cell center user terminal are user terminals directly served by the base station according to the user geometric distribution, wherein the cell center user terminal is a user of the base station close to the cell. The terminal, and the cell center UE is a user terminal close to the cell boundary.
1 1、 根据权利要求 8所述的设备, 其中对所述小区的附属中继点 产生最大干扰的所述小区的相邻小区是由对所述附属中继点产生主干 扰的扇区所覆盖且与所述小区相邻的小区。  1 1. The apparatus according to claim 8, wherein a neighboring cell of the cell that generates the greatest interference to an affiliate relay point of the cell is covered by a sector that generates primary interference to the secondary relay point. And a cell adjacent to the cell.
12、 根据权利要求 8所述的设备, 其中所述频率重用是局部频率 重用。  12. Apparatus according to claim 8 wherein said frequency reuse is local frequency reuse.
1 3、 根据权利要求 8所述的设备, 其中所述频率重用是软频率重 用, 其中分配给所述小区内的小区中心用户终端和所述小区的附属中 继点的所述小区中心频带可重用分配给相同基站位置处的与所述小区 相邻的两个小区的两个小区边缘频带。 、根据权利要求 8所述的设备, 其中所述中继通信系统是 3GPP 信系统。 The device according to claim 8, wherein the frequency reuse is soft frequency reuse, wherein the cell center frequency band allocated to a cell center user terminal in the cell and an auxiliary relay point of the cell may be Two cell edge bands allocated to two cells adjacent to the cell at the same base station location are reused. The apparatus according to claim 8, wherein the relay communication system is a communication system 3 GPP.
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