WO2009070928A1 - Procédé pour coordonner les ressources entre des cellules - Google Patents

Procédé pour coordonner les ressources entre des cellules Download PDF

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Publication number
WO2009070928A1
WO2009070928A1 PCT/CN2007/003421 CN2007003421W WO2009070928A1 WO 2009070928 A1 WO2009070928 A1 WO 2009070928A1 CN 2007003421 W CN2007003421 W CN 2007003421W WO 2009070928 A1 WO2009070928 A1 WO 2009070928A1
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WIPO (PCT)
Prior art keywords
cell
resource
local
neighboring
frequency
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PCT/CN2007/003421
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English (en)
French (fr)
Inventor
Xinxi Diao
Original Assignee
Zte Corporation
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Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2007/003421 priority Critical patent/WO2009070928A1/zh
Priority to JP2010535195A priority patent/JP5228059B2/ja
Priority to CN2007801011124A priority patent/CN101828359B/zh
Publication of WO2009070928A1 publication Critical patent/WO2009070928A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/27Control channels or signalling for resource management between access points

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for resource coordination between cells, which is used for coordination of space, time, frequency, and power resources between cells.
  • BACKGROUND OF THE INVENTION Soft frequency reuse technology is an important method for solving inter-cell interference.
  • the technology divides all subcarriers of an OFDM (Orthogonal Frequency Division Multiple Access) system into m groups, and different neighboring cells select different subcarriers as the primary subcarrier of the current cell, and other subcarriers serve as the local cell.
  • OFDM Orthogonal Frequency Division Multiple Access
  • the secondary subcarriers further set different transmit power thresholds for the primary and secondary subcarriers of each cell, and the transmit power threshold of the primary subcarrier is higher than the transmit power threshold of the secondary subcarrier, and the cell boundary is determined by the coverage of the primary subcarrier.
  • the primary subcarrier is allocated from the center of the cell to the cell edge, which can cover the entire cell range. Thus, for the cell, the lower power subcarrier is mainly used to transmit data. Because the base station is relatively close to the base station, the terminal can receive the present.
  • the cell has a clear signal, and because the sub-subcarrier power is small, the interference between adjacent cells is also relatively small; and in the neighboring cell edge regions, the high-power primary carrier is used to transmit data, and the terminal in the edge region mainly receives.
  • the primary subcarriers of different neighboring cells are obtained. Since the primary subcarriers of different neighboring cells do not overlap and are orthogonal, mutual interference is greatly reduced.
  • Chinese Patent Application No. CN200510068133 entitled “Method for Coordinating Inter-Cell Interference by Power Planning for OFDM Mobile Communication Systems", and “Methods, Base Stations, Terminals and Networks for Uplink Interference Coordination in Single Frequency Networks"
  • CN200610087983 is an inter-cell interference coordination technique based on the above-mentioned soft frequency reuse principle.
  • the two technologies are characterized by assigning specific time-frequency resource blocks to wireless terminals in the edge area, and combining power control to control the strength of interference between adjacent cells.
  • the inter-cell interference coordination technology being discussed by the 3rd Generation Mobile Telecommunications Long Term Evolution System Standards Organization (3GPP LTE) is concentrated in the technical proposal Rl-074477, "Way forward on UL ICIC/Overload Indicator for LTE: Long-term evolution system Standardization research direction of interference coordination and overload indication".
  • the OI information needs to be transmitted on the X2 interface, including: the carrier information of the active uplink interference at the physical resource block level, and the response mode of the eNode B after receiving the OI.
  • the foregoing anti-collision avoidance scheme and the overload indication scheme only a predetermined portion of the spectrum resources in the entire system spectrum can be allocated to the wireless terminals in the edge region, which limits the available bandwidth of the edge wireless terminal, thereby affecting the wireless terminal. Transmission rate.
  • the present invention has been made in view of the problem that the early collision avoidance scheme and the overload indication scheme in the related art have limitations in limiting the available bandwidth of the wireless terminal and causing an increase in inter-cell control signaling interaction, and the present invention is directed to providing a Small-area resource coordination mechanism.
  • a method for resource coordination between cells is provided, which is used for coordination of space, time, frequency, and power resources between cells.
  • the radio node of the cell determines a plurality of neighboring cell radio nodes adjacent thereto; the radio node of the cell performs interaction with the resource coordination information of the plurality of neighboring cell radio nodes determined by the cell; and based on the interaction of the resource coordination information, the radio node of the cell determines itself And the resources used by several neighboring cell wireless nodes in a specific time period in the future.
  • the neighboring cell wireless node is determined by using any one of the following operations: according to the network plan, the wireless node that is less than the predetermined distance from the wireless node of the local cell is used as the neighboring cell wireless node, with the wireless node of the local cell as the center; According to the network plan, the wireless node that is less than the predetermined distance from the wireless node of the local cell is used as the neighboring cell wireless node, centering on the wireless node of the local cell.
  • the resource coordination information includes any one of the following and a combination thereof: a statement of a resource being used and/or to be used by the cell, a statement about how the cell is being used and/or a mode of use of the resource to be used, the cell Status information.
  • the resource declaration that the cell is using and/or to be used includes any one of the following and a combination thereof: a time and frequency position of a time-frequency resource block occupied by the current cell, a transmission space orientation of a time-frequency resource block occupied by the current cell, or / and the coverage angle width, the power configuration of the time-frequency resource block occupied by the local cell;
  • the statement of the usage mode of the resource being used and/or to be used by the cell includes a declaration of the following usage mode: at a specific time, space, frequency
  • Certain resources are used in a manner exclusive to the cell; certain resources are used in a manner shared with the neighboring cells in a specific time, space, and frequency; the status information of the current cell includes: a load indication on the time-frequency resource block occupied by the local cell .
  • the resource coordination information further includes at least one of the following: in a case where the manner of using the resource that is used and/or to be used by the cell is in an exclusive manner, the resource coordination information further includes: at least one of the following: an angle width information of the shaped beam of the cell, and a local cell type The spatial hopping information of the transmission angle of the beam; in the case where the declaration of the usage mode of the resource being used and/or to be used by the local cell is a shared mode, the resource coordination information further includes at least one of the following: The frequency hopping pattern or the frequency hopping pattern number on the frequency resource, the occupied time pattern or the time pattern number of the specific frequency resource of the local cell.
  • the operation of the local cell radio node to determine the resources used by the radio node of the cell and the neighboring cell in a specific time period in the future includes any one of the following: the radio node of the cell sorts the priorities of the cell and the neighboring cell; The wireless node of the cell performs resource allocation to the local cell and the neighboring cell according to the priority ordering and the predetermined resource allocation rule; the wireless node of the cell sorts the potential of the local cell and the neighboring cell; the wireless node of the cell sorts and schedules according to the potential
  • the resource allocation rule implements resource allocation to the own cell and the neighboring cell.
  • the foregoing predetermined resource allocation rule is: in the process of allocating resources to the local cell and the neighboring cell, the resources used for the declaration and the resources declared by other cells may avoid conflicts in any dimension of space, time, and frequency.
  • the cell, the wireless node of the cell uses its declared resource in a specific time period; in the process of allocating resources to the cell and the neighboring cell, the resource used for its declaration and the resource declared by other cells are in space, time, frequency There are conflicting cells on the dimension.
  • the radio node of the cell makes the cell with the highest priority or the highest potential in the cell with the resource declaration conflict occupy its declared resource, so that the cell with the priority level 1 renounces its declared resource.
  • the cell For a cell that abandons its declared resource, the cell is in a radio frame, according to the priority order or potential of the cell that abandons its declared resource, according to the resource dimension of time, frequency, and space angle, according to the predetermined The sequence formed by one or more combinations of time, frequency, and angle finds in the existing vacant resources that the resources declared by the cell can be satisfied.
  • the priority of the cell and the neighboring cell may be determined according to the cell load or the resource utilization rate, wherein the cell with the highest priority is the cell with the heaviest load or the utilization rate of the conflict resource block.
  • the highest cell; and, the potential of the local cell and the neighboring cell may be determined according to the number of the wireless node of the cell and the number or geographic coordinates of the neighboring cell wireless node.
  • the resource coordination method according to the embodiment of the present invention further includes the following processing: The local cell radio node locally forms a resource usage list of the own cell and the neighboring cell.
  • the resource coordination method according to the embodiment of the present invention further includes the following processing: the cell of the neighboring cell of the cell is particularly sensitive to the frequency used by the radio node of the cell, and coordinates the power resource of the cell in the frequency. use.
  • the resource coordination method further includes the following processing: the local cell radio node determines the usage mode of the resource by itself and several neighboring cell radio nodes in a specific time period in the future; : The cell of the cell counts the usage of the resources declared by the radio node of the cell and the neighboring cell, and uses the resource usage mode with the most declared number as the resource usage mode of the cell and the neighboring cell; Or two or more types of resource usage, the resource usage mode declared by the cell with the highest priority or the highest potential is used as the resource usage mode of the local cell and the neighboring cell; or the cell with the highest priority or the highest potential is used.
  • the declared resource usage mode is used as the resource usage mode of the cell and the neighboring cell.
  • the resource coordination information of the interaction is the integration of the resource states of the neighboring multiple groups of neighboring cell wireless nodes.
  • the invention can be used for coordination of uplink transmission resources and coordination of downlink transmission resources, and can be used for coordination of resources in a time division duplex system, and can also be used for ten adjustments of resources in a frequency division duplex system.
  • the cell can be autonomously determined to use the resource and the working mode in a specific time in the future, and the dynamic coordination of the resources between the cells can be realized in the entire frequency band of the radio access network.
  • the resources between the cells can be dynamically coordinated in a specific partial frequency band, so that the available resources of the cell edge terminal can be extended to the entire system frequency band, thereby improving the wireless terminal and the transmission rate.
  • FIG. 1 is a flowchart of a method for resource coordination between cells according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a radio access network for resource coordination between cells according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of resources of the acquisition status of each cell after conflict resource configuration according to an embodiment of the present invention.
  • the embodiment of the present invention provides a The small-area resource coordination scheme, the small interval determines the subsequent resource usage based on the information interaction.
  • the preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and not to limit the invention. According to an embodiment of the present invention, a resource coordination method between cells is provided.
  • the method can be used for uplink resource coordination between cells, and can also be used for downlink resource coordination between cells, and can be used for ten resources in a time division duplex system, and can also be used for ten resources in a frequency division system. Tune.
  • the wireless node mentioned herein may be a complete base station with a feedback unit, a baseband processing unit, a radio resource management unit, or a remote radio unit in a distributed base station.
  • the wireless node is a remote radio unit in the distributed base station, the transmission and resource allocation of the resource coordination information between the wireless nodes or the cells is performed by the relevant unit located in the baseband processing unit (BBU) of the distributed base station.
  • BBU baseband processing unit
  • the resource coordination method between cells in the embodiment of the present invention may include the following processing: Step S102, the local cell radio node determines (for example, selects) a plurality of neighboring small radio nodes adjacent thereto; the local cell radio node mentioned herein may be a radio node of any cell; Step S104, the local cell radio node determines The neighboring cell radio nodes perform the resource coordination information interaction; in step S106, the local cell radio node determines the resources used by the radio node of the cell and the plurality of neighboring cell radio nodes in a specific time period in the future, or preferably, the radio node of the cell It is also possible to further determine how these resources are used.
  • step S102 may be performed in a first time interval
  • step S104 is performed in a second time interval
  • step S106 is performed in a third time interval.
  • first to third time intervals described above may be continuous in time or disconnected in time.
  • Step S102 in the step, the method for determining the neighboring wireless node may be as follows: Method 1. #_ According to the geographical location of the wireless node planned by the network, centering on the wireless node of the cell, The N wireless nodes whose distances of the wireless nodes in the cell are less than the predetermined distance are used as the neighboring nodes. Generally, N is a natural number between 2 and 7, and the specific value depends on the frequency reuse coefficient used in the network frequency planning; The wireless node in the edge area of the coverage area of the wireless node of the cell exceeds the threshold (predetermined threshold) of the wireless node as a neighboring node.
  • the measured quantity of the wireless terminal is the RSRP (Reference Symbol received power) measurement for "edge UE".
  • Step S104 the manner in which the wireless node of the local cell interacts with the neighboring node includes: performing interaction through a "backhaul,” (BACKHAULL) channel between the wireless nodes; and interacting through the air interface.
  • BACKHAULL backhaul
  • the interactive resource coordination information may be any one of the following and a combination thereof: a resource that is being used and/or to be used by the community (the resources mentioned herein include one or more of the following: space, time, frequency, and power resources) A statement of the manner in which the resource being used and/or to be used by the cell is used, and status information of the cell.
  • resource coordination refers to whether a transmitting or receiving channel of a neighboring cell can be configured to provide services for a terminal of a neighboring cell. For example, when the wireless node A borrows part of the frequency resource b of the local cell to the terminal of the cell, there are two ways of borrowing. One way is to borrow b to the edge user of the neighboring cell, and the wireless in the central area of the cell.
  • the terminal still uses b to receive the service provided by the wireless node of the local cell.
  • the transmitting or receiving channel resources of the wireless node of the cell in the cell are still occupied by the UE of the cell, and therefore, the transmitting or receiving channel resources on b cannot be used.
  • the neighboring cell borrows; the other way is that after the wireless node A borrows b to the edge user of the neighboring cell, the wireless terminal of the cell no longer uses b. In this case, the wireless node A transmits or receives channel resources on b. It can also be borrowed by neighboring cells.
  • the resource declaration that the cell is using and/or to be used includes any one of the following and a combination thereof: a time and frequency position of a time-frequency resource block occupied by the local cell, and a spatial orientation of a time-frequency resource block occupied by the local cell.
  • the power configuration of the time-frequency resource block occupied by the local cell includes a declaration of the following usage mode: at a specific time, space, frequency
  • Certain resources are used in a manner exclusive to the cell; certain resources are used in a manner shared with the neighboring cells in a specific time, space, and frequency; the state information of the cell includes: a load on the time-frequency resource block occupied by the cell Instructions.
  • the resource coordination information further includes at least one of the following: in a case where the manner of using the resource that is being used and/or to be used by the cell is in an exclusive manner, the resource coordination information further includes: at least one of the following: an angle width information of the shaped beam of the cell, and a local cell type The hopping information of the transmission angle of the beam in space; in the case where the declaration of the usage mode of the resource being used and/or to be used by the own cell is a shared mode, the resource coordination information further includes at least one of the following: A frequency hopping pattern or a frequency hopping pattern number on the frequency resource, an occupation time pattern of the specific spectrum resource of the current cell, or a time pattern number.
  • the status information of the current cell includes service status information, network status information, and the like.
  • the network status information specifically includes: the measurement quantity of the neighboring cell (such as the handover measurement quantity performed by the terminal), the load condition of the local cell, the interference situation of the current cell, the number of cell edge terminals, and the traffic volume, etc.; It is divided into high-latency interaction and 4-delay interaction; high-latency interaction can be in tens of milliseconds; delay interaction can be in a few milliseconds, for example, each wireless subframe completes an interaction, The wireless sub-small is lms ⁇ 5ms.
  • Step S106 the operation of the radio node of the own cell and the resources used by the wireless nodes of the neighboring cells in a specific time period in the future may be any of the following: Operation 1: Wireless in the cell
  • the node sorts the priorities of the local cell and the neighboring cell; the local cell wireless node performs resource allocation to the local cell and the neighboring cell according to the priority ordering and the predetermined resource allocation rule, and preferably, the local cell wireless node forms the local cell locally.
  • the radio node of the cell sorts the potentials of the local cell and the neighboring cell; the wireless node of the cell performs resource allocation to the local cell and the neighboring cell according to the ordering of the potential and the predetermined resource allocation rule. And preferably, the local cell radio node locally forms a resource usage list of the own cell and the neighboring cell.
  • the priority of the cell may be determined according to the cell load (operation 1-1) or the resource utilization (operation 1-2), such that the cell with the highest priority is the most heavily loaded cell or the conflicting resource.
  • the cell with the highest utilization rate of the block; and in the above operation 2, the potential of the cell can be determined according to the number or geographic coordinates of the cell wireless node.
  • the cell with the smallest (or largest) number is the largest, and for example, from east to west (or west to east), south to north (or north to south), top to bottom ( Or the order from the bottom to the top to determine the potential of the wireless node, in which the top (or last) cell in this order has the "potential" maximum.
  • the above operations can be used in combination. For example, when two cells have the same load, 1-1 will not be implemented. At this time, operation 2 can be further introduced; in the case where the two cells have the same resource utilization rate. Next, operation 1-2 will not be implemented, and operation 2 can be further introduced.
  • the predetermined resource allocation rules mentioned above will be described in detail below.
  • the resource allocation rule may be: in the process of allocating resources to the local cell and the neighboring cell, the cell that is declared to be used and the resource declared by other cells may be used to avoid conflicting cells in any dimension of space, time, and frequency.
  • the wireless node of the cell uses its declared resources in a specific time period; on the other hand, in the process of allocating resources to the own cell and the neighboring cell, the resources used for its declaration and the resources declared by other cells are in space, time, and frequency.
  • a cell having a collision in any of the cells the cell of the cell makes the cell with the highest priority or the highest potential among the cells with the resource declaration conflict occupy its declared resource, so that the cell with the lower priority waives its declared resource.
  • the cell For a cell that abandons its declared resource, the cell is in a radio frame, according to the priority order or potential of the cell that abandons its declared resource, according to the resource dimension of time, frequency, and space angle, according to the predetermined
  • the principle of searching for a resource may be: in a cell that does not obtain the resource that is claimed, the cell with the highest priority first searches for available resources (resource blocks) in the current radio frame, starting from the beginning of the radio frame.
  • the first resource block (group) that can satisfy the resource declared by the wireless node as a resource allocated to the wireless node.
  • the radio node of the cell coordinates the power resource usage of the frequency of the cell according to the interference sensitivity of the neighboring cell on the frequency used by the radio node of the cell. For example, limiting the maximum transmit power on these frequency resources, adjusting the user or service schedule on these frequencies, and the like. This can further reduce inter-cell interference.
  • the local cell radio node can determine the usage of the resource in addition to determining the resources used by the own and several neighboring cell radio nodes in a specific time period in the future.
  • the method for determining the usage of the resource may be implemented by the following processes: (1) The wireless node of the cell performs statistics on the usage of resources declared by itself and a plurality of neighboring cell wireless nodes, and uses the most declared resource usage manner. As the resource usage mode of the local cell and the partial cell; if there are two or more resource usage modes with the same number of times of declaration, the resource usage mode declared by the cell with the highest priority or the highest potential is taken as the local cell and the neighboring cell.
  • the resource usage mode of the cell or (2) the resource usage mode declared by the cell with the highest priority or the highest potential as the resource usage mode of the local cell and the neighboring cell.
  • the resource coordination method according to the embodiment of the present invention only one arbitrary cell is used as the local cell as an example.
  • the overall processing form and results of multiple neighboring cells are used, and the wireless node of the cell and several neighboring cells are used.
  • the wireless node processes the resource coordination information of the cell and its neighboring cells in a completely consistent processing rule, and selects a group of neighboring cells in the cell. Inside, each forms an identical resource usage list corresponding to the set of adjacent relationships.
  • a radio access network for implementing an inter-cell resource coordination method is shown in FIG. 2, and includes: wireless nodes 201a-201g, and two wireless terminals 202a and 202b.
  • Each wireless node separately covers different cells, and the frequency reuse coefficient of the central area (shaded area) of each cell is 1. In the edge region of each cell, coverage is achieved using 1/3 of the frequency reuse coefficients.
  • the wireless terminal 202a is in the edge area where the wireless access point 201a covers the cell
  • the wireless terminal 202b is in the edge area where the wireless access point 201g covers the cell.
  • the numbers are assumed to be: Wireless node 201a--->2000-001 Wireless node 201b--->2000-002
  • Wireless Node 201f -> 2000-006 Wireless Node 201g -> 2000-007
  • resource coordination is performed using the resource coordination method between cells according to an embodiment of the present invention.
  • the wireless node 201a determines that the wireless terminal 202a is an edge terminal according to the RSRP (Reference Symbol received power) measurement amount for switching on the wireless terminal 202a (because the RSRP reported by the wireless terminal 202a includes two exceeding strength preset thresholds)
  • the pilot of the neighboring cell: ), and the location of the edge terminal 202a is in the vicinity of the boundary between the cell and the wireless access point 201g coverage cell and the wireless access point 201f coverage cell (because the wireless access point reported by the wireless terminal 202a) 201g, the strength of the RSRP of the wireless access point 201f exceeds a preset threshold); like the process and method of the wireless node 201a, the wireless node 201g according to the RSRP (Reference Symbol received power) measurement amount reported by the wireless terminal 202b for switching, It is determined that the wireless terminal 202b is an edge terminal, and the location of the edge terminal 202b is in the vicinity of the boundary between the local cell and the wireless access point 201g coverage
  • the wireless node 201a declares that the wireless access point 201g and the wireless access point 201f are used for the cell.
  • the edge-covered resource block (as shown in Figure 3, in Figure 3, the labeled "serving cell” is the "home cell”, the labeled “adjacent cell” is the “neighboring cell”), and through the X2 interface
  • This resource usage statement is sent to the wireless access point 201g, the wireless access point 201f; in order for the wireless terminal 202b to transmit data to its serving node wireless node 201g at a high rate, the wireless node 201g declares that the wireless access point 201a is used, wirelessly The access point 201f is used for the resource block covered by the cell edge (as shown in FIG.
  • time interval 2 the resource usage declaration to the wireless access point 201a and the wireless access point 201f through the X2 interface; in this process (time interval 2)
  • the wireless node 201f also sends information that does not use any frequency resources to the neighboring cells such as the wireless access point 201a and the wireless access point 201g.
  • inter-cell resource coordination is performed. Since the resources declared by the wireless access point 201a and the wireless access point 201g are in conflict with the resources declared by the other party, the mediation is performed according to the specific operation in the predetermined resource allocation rule (or called the conflict arbitration mechanism) described above. For example, the operation 2 mentioned above can be employed.
  • the wireless access point 201a and the wireless access point 201g determine their “potentials" according to their respective numbers.
  • the principle adopted here is that the smaller the serial number of the wireless node, the larger its “potential".
  • the number of the wireless node 201a is 2000-001, and the number of the wireless node 201g is 2000-007. Therefore, the "potential" of the wireless node 201a is larger than the wireless node 201g.
  • the “potential”, therefore, the wireless node 201a uses its declared resource, and the wireless node 201g can use the corresponding resource block in the first resource block set of the current radio frame that can satisfy its resource usage declaration as its own in the future. Resources used.
  • the wireless access point 201a and the wireless access point 201g obtain the resources as shown in FIG. 4 (in FIG. 4, the labeled "monthly traffic cell” is the “this cell", which is marked. “4) 5 near cell “that is, "4p cell”).
  • FIG. 4 the labeled "monthly traffic cell” is the “this cell”, which is marked. "4) 5 near cell “that is, "4p cell”).
  • the above example describes the case where 4 bar each radio node coordinates the resource block for cell edge coverage to the terminal in the edge region, but the method of the present invention can also be used for resource blocks on the entire frequency band of the radio access network. Coordinating the situation to the terminal in the edge zone.
  • the foregoing example is an implementation method that takes the coordination of uplink transmission resources as an example, but the method provided by the present invention can also be used for downlink resource 1 scheduling between cells.
  • the cell can autonomously determine its resource usage and working mode in a specific time in the future through inter-cell interaction, which can achieve inter-cell access in the entire frequency band of the radio access network.
  • the resources are dynamically coordinated, and the resources between the cells can be dynamically coordinated in a specific partial frequency band, so that the available resources of the cell edge terminal can be extended to the entire system frequency band, and the resource allocation optimization between the cells and the system throughput can be realized. Optimization, which in turn can increase the wireless terminal's and transmission rate.

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  • Time-Division Multiplex Systems (AREA)

Description

小区间的资源协调方法 技术领域 本发明涉及通信领域, 具体地, 涉及小区间的资源协调方法, 用于小区 间的空间、 时间、 频率、 以及功率资源的协调。 背景技术 软频率复用技术是解决小区间干扰的一种重要方法。 该技术将 OFDM ( Orthogonal Frequency Division Multiple, 正交频分多址) 系统所有子载波 划分成 m组, 不同的相邻小区选择不同组的子载波作为本小区的主子载波, 其他子载波作为本小区的副子载波, 再对各小区的主子载波和副子载波设置 不同的发射功率门限, 且主子载波的发射功率门限高于副子载波的发射功率 门限, 以主子载波的覆盖范围确定小区边界。 从小区中央到小区边缘分配的 是主子载波, 它可以覆盖整个小区的范围; 这样, 对于小区内部, 主要采用 较低功率的副子载波传输数据, 由于离基站比较近, 因此终端可以接收到本 小区清晰的信号, 并且由于副子载波功率较小, 因此相邻小区之间的干扰也 比较小; 而在各相邻小区边缘区域均采用高功率主载波传输数据, 处于边缘 区域的终端主要接收到的是不同相邻小区的主子载波, 由于不同相邻小区的 主子载波不相重叠且为正交, 因此相互干扰就会大大降低。 例如, 标题为 "通过对 OFDM移动通信系统的功率规划协调小区间干 扰的方法" 的第 CN200510068133号中国专利申请, 以及标题为 "单频网中 上行链路干扰协调的方法、 基站、 终端和网络" 的第 CN200610087983号中 国专利申请, 都是基于上述软频率复用原理提出的小区间干扰协调技术。 这 两种技术的特点是为边缘区域的无线终端分配特定的时频资源块, 并结合功 率控制来控制邻小区间干扰的强度。 第三代移动通信长期演进系统标准组织 (3GPP LTE )正在讨论的小区 间干扰协调技术集中体现在技术提案 Rl-074477, "Way forward on UL ICIC/Overload Indicator for LTE:长期演进系统中上行小区间干扰协调及过载 指示的标准化研究方向" 中。 技术提案 R1 -074477给出了提前避免冲突方案 ( "pro-active approach" )和用于上行功率控制的独立于" pro-active approach" 的过载指示方案 ( overload indicator, 简称为 OI )。 提前避免冲突方案的思路是:从服务 e Node B通过 X2接口向各个相邻 e Node B发送一个指示信息 X, 指示信息 X指示出服务 e Node在调度边缘 UE ( User Equipment, 用户设备)将要使用, 从而产生强小区间干扰的那些 BPRB , 这些 BPRB也成为对邻小区干扰敏感的 PRB。 收到指示信息 X的 e Node B将尽量避免在指示信息 X指示的频率范围内调度本小区的边缘 UE, 也就是尽量避免在这个敏感的频率范围内产生干扰。 过载指示方案的思路是: 为了实现上行功控, 需要在 X2接口上传送 OI信息, 包括: 物理资源块级的正在作用中的上行干扰的载波信息, 接收到 OI之后 e Node B的反应方式。 在上述的提前避免冲突方案和过载指示方案中,只能为边缘区域的无线 终端分配整个系统频谱中的预先规定好的一部分频谱资源, 这会限制边缘无 线终端的可用带宽, 从而会影响无线终端的传输速率。 发明内容 考虑到相关技术中的提前避免冲突方案和过载指示方案存在限制无线 终端的可用带宽以及会导致小区间控制信令交互增加的问题而提出本发明 , 为此, 本发明旨在提供一种小区间资源协调机制。 根据本发明,提供了一种小区间的资源协调方法,该方法用于小区间的 空间、 时间、 频率、 以及功率资源的协调。 本小区无线节点确定与其相邻的若干个邻小区无线节点;本小区无线节 点与其确定的若干个邻小区无线节点进行资源协调信息的交互; 基于资源协 调信息的交互, 本小区无线节点确定其自身以及若干个邻小区无线节点在未 来特定时间段内所使用的资源。 优选地, 通过以下操作中的任一种来确定邻小区无线节点: 根据网络规 划, 以本小区无线节点为中心, 将与本小区无线节点的距离小于预定距离的 无线节点作为邻小区无线节点; 根据网络规划, 以本小区无线节点为中心, 将与本小区无线节点的距离小于预定距离的无线节点作为邻小区无线节点。 进一步优选地, 上述的资源协调信息包括以下任一种及其组合: 对本小 区正在使用和 /或将要使用的资源声明、 对本小区正在使用和 /或将要使用的 资源的使用方式的声明、 本小区的状态信息。 其中, 本小区正在使用和 /或将要使用的资源声明包括以下任一种及其 组合: 本小区占用的时频资源块的时间和频率位置、 本小区占用的时频资源 块的发射空间方位或 /和覆盖角度宽度、 本小区占用的时频资源块的功率配 置;本小区正在使用和 /或将要使用的资源的使用方式的声明包括对如下使用 方式的声明: 在特定时间、 空间、频率上以本小区独占的方式使用某些资源; 在特定时间、 空间、 频率上以与邻小区共享的方式使用某些资源; 本小区的 状态信息包括: 本小区占用的时频资源块上的负载指示。 其中, 在对本小区 正在使用和 /或将要使用的资源的使用方式的声明为独占方式的情况下,资源 协调信息进一步包括以下至少之一: 本小区赋型波束的角度宽度信息、 本小 区赋型波束的发射角度在空间上的跳变信息;在对本小区正在使用和 /或将要 使用的资源的使用方式的声明为共享方式的情况下, 资源协调信息进一步包 括以下至少之一: 本小区在特定频 资源上的跳频图案或者跳频图案编号、 本小区对特定频讲资源的占用时间图案或者时间图案编号。 具体地,本小区无线节点确定其自身以及若干个邻小区无线节点在未来 特定时间段内所使用的资源的操作包括以下任一种: 本小区无线节点对本小 区以及邻小区的优先级进行排序; 本小区无线节点按照优先级排序以及预定 的资源分配规则, 实现对本小区以及邻小区的资源分配; 本小区无线节点对 本小区以及邻小区的势进行排序; 本小区无线节点按照对势的排序以及预定 的资源分配规则, 实现对本小区以及邻小区的资源分配。 其中, 上述的预定的资源分配规则为: 在对本小区以及邻小区分配资源 的过程中, 对于其声明使用的资源与其他小区声明使用的资源可以在空间、 时间、 频率任一维上避免冲突的小区, 小区的无线节点在特定时间段内使用 其声明的资源; 在对本小区以及邻小区分配资源的过程中, 对于其声明使用 的资源与其他小区声明使用的资源在空间、 时间、 频率任一维上都存在冲突 的小区, 本小区无线节点使得存在资源声明冲突的小区中的具有最高优先级 或最高势的小区占有其声明的资源,使得优先级 ¼<的小区放弃其声明的资源。 而对于放弃其声明的资源的小区, 本小区在一个无线帧内,按照放弃其 声明的资源的小区的优先级顺序或势的高低, 在时间、 频率、 空间角度的资 源维上, 依据预定的时间、 频率、 角度的一种或多种组合形成的顺序, 在存 在的空余资源中查找可以满足该小区所声明的资源。 另夕卜,在上述处理中, 可以才艮据小区负载或资源利用率确定本小区和邻 小区的优先级, 其中, 优先级最高的小区为负载最重的小区或对冲突资源块 的利用率最高的小区; 并且, 可以根据本小区无线节点以及邻小区无线节点 的编号或地理坐标确定本小区和邻小区的势。 优选地,根据本发明实施例的资源协调方法进一步包括以下处理: 本小 区无线节点在本地形成本小区及邻小区的资源使用列表。 进一步优选地, 根据本发明实施例的资源协调方法进一步包括以下处 理: 本小区无线节点 居邻小区在本小区无线节点使用的频率上的干 4尤敏感 程度, 协调本小区在频率上的功率资源使用。 进一步优选地, 才艮据本发明实施例的资源协调方法进一步包括以下处 理: 本小区无线节点确定其自身以及若干个邻小区无线节点在未来特定时间 段内对资源的使用方式; 具体为如下操作: 本小区无线节点对其自身以及若 干个邻小区无线节点声明的资源的使用方式进行统计, 将声明次数最多的资 源使用方式作为本小区以及邻小区的资源使用方式; 如果存在声明次数相等 的两种或两种以上的资源使用方式, 则将具有最高优先级或最高势的小区所 声明的资源使用方式作为本小区以及邻小区的资源使用方式; 或者将具有最 高优先级或者最高势的小区所声明的资源使用方式作为本小区以及邻小区的 资源使用方式。 另外需要说明的是, 当本小区无线节点同时与多组若干个邻小区无线 节点相邻时, 其交互的资源协调信息是对其相邻的多组若干个邻小区无线节 点的资源状态的综合。 本发明既可用于上行传输资源的协调, 也可用于下行传输资源的协调, 既可用于时分双工系统中资源的协调,也可用于频分双工系统中资源的十办调。 通过本发明, 借助于小区间的交互, 可以使得小区自主地确定其在未来特定 时间内的资源使用和工作模式, 既可以实现在无线接入网的整个频带上对小 区间的资源进行动态协调 , 也可以在特定的部分频带上对小区间的资源进行 动态协调, 从而可以使小区边缘终端的可用资源扩展到整个系统频带, 进而 可以提升无线终端的和传输速率。 本发明的其它特征和优点将在随后的说明书中阐述, 并且,部分地从说 明书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优
4 点可通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实 现和获得。 附图说明 附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本 发明的实施例一起用于解释本发明, 并不构成对本发明的限制。 在附图中: 图 1是 居本发明实施例的小区间的资源协调方法的流程图; 图 2是根据本发明实施例的小区间资源协调的无线接入网示意图; 图 3是 居本发明实施例的资源声明占用的示意图; 图 4 是根据本发明实施例的冲突资源配置后各个小区的获取情况的资 源示意图。 具体实施方式 如上文所述,在目前的提前避免冲突方案和过载指示方案中,存在限制 无线终端的可用带宽以及会影响无线终端的传输速率的问题, 鉴于此, 本发 明实施例提供了一种小区间的资源协调方案, 小区间根据信息交互来确定后 续的资源使用。 以下结合附图对本发明的优选实施例进行说明,应当理解, 此处所描述 的优选实施例仅用于说明和解幹本发明, 并不用于限定本发明。 根据本发明实施例,提供了一种小区间的资源协调方法。 该方法可用于 小区间的上行资源协调, 也可用于小区间的下行资源协调, 并且, 既可用于 时分双工系统中资源的十办调, 也可用于频分欢工系统中资源的十办调。 另外需 要说明的是, 本文中提到的无线节点可以是一个带有反馈单元、 基带处理单 元、 无线资源管理单元的完整基站, 也可以是一个分布式基站中的一个远端 射频单元。 当无线节点是分布式基站中的一个远端射频单元时, 无线节点或 小区间的资源协调信息的传输及资源分配由位于分布式基站的基带处理单元 ( BBU ) 内的相关单元完成。 首先, 如图 1所示, #居本发明实施例的小区间的资源协调方法可以包 括以下处理: 步驟 S102, 本小区无线节点确定(例如, 挑选) 与其相邻的若干个邻 小取无线节点; 这里提到的本小区无线节点可以是任意小区的无线节点; 步骤 S104, 本小区无线节点与其确定的若干个邻小区无线节点进行资 源协调信息的交互; 步骤 S106, 本小区无线节点确定其自身以及若干个邻小区无线节点在 未来特定时间段内所使用的资源, 或者优选地, 本小区无线节点还可以进一 步确定对这些资源的使用方式。 例如, 可以在第一时间区间内执行步骤 S102, 在第二时间区间内执行 步驟 S104, 在第三时间区间内执行步 S106。 其中, 上述的第一至第三时 间间隔可以是在时间上连续的, 也可以是在时间上断开的。 例如, 可以在第 二时间区间与第三时间区间内存在一个用于无线节点间 (或者小区间) 资源 使用声明等信息的重发时间区间。 以下^1进一步对上述各项进行描述。
(―) 步骤 S102 , 在该步錄中, 确定邻近的无线节点的方法可以有如下几种: 方法 1.#_据网络规划的无线节点的地理位置, 以本小区无线节点为中 心,将与本小区无线节点的距离小于预定距离的 N个无线节点作为邻区节点, 一般地, N为 2〜7之间的自然数, 其具体取值取决于网络频率规划采用的频 率复用系数; 方法 2.将本小区无线节点覆盖区域的边缘区域内的无线终端测量量超 过阔值(预定门限) 的无线节点作为邻区节点。 一^:地, 无线终端的测量量 是 "边缘 UE" 的用于切换的 RSRP ( Reference symbol received power ) 测量 量。 通常, RSRP越强, 则邻近小区的发射信号对终端的干尤越强, 并且, 无线终端的发射信号对邻近小区的无线节点的干扰也越强。 (二) 步骤 S104 在该步驟中, 本小区无线节点与邻区节点进行交互的方式包括: 通过无 线节点间的 "回程,,(BACKHAULL )通道实现交互; 通过空中接口交互。 交互的资源协调信息可以为以下任一种及其组合:对本小区正在使用和 /或将要使用的资源(这里提到的资源包括以下一种或多种: 空间、 时间、 频 率及功率资源)声明、 对本小区正在使用和 /或将要使用的资源的使用方式的 声明、 本小区的状态信息。 其中,对于通道资源而言, 资源协调是指邻小区的发射或者接收通道是 否可以被配置为为邻小区的终端提供服务。 比如, 无线节点 A将本小区的部 分频率资源 b借用给部小区的终端时可以有两种借用方式, 一种方式是将 b 借用给邻近小区的边缘用户的同时, 本小区的中心区域的无线终端仍然使用 b接收由本小区的无线节点提供的业务, 此时本小区的无线节点在 b上的发 射或接收通道资源仍然为本小区的 UE 占用, 因此, b上的发射或接收通道 资源不能被邻近小区借用; 另一种方式是无线节点 A将 b借用给邻近小区的 边缘用户后, 本小区的无线终端不再使用 b, 这种情况下, 无线节点 A在 b 上的发射或接收通道资源也可以被邻近小区借用。 具体地, 本小区正在使用和 /或将要使用的资源声明包括以下任一种及 其组合: 本小区占用的时频资源块的时间和频率位置、 本小区占用的时频资 源块的发射空间方位或 /和覆盖角度宽度、本小区占用的时频资源块的功率配 置;本小区正在使用和 /或将要使用的资源的使用方式的声明包括对如下使用 方式的声明: 在特定时间、 空间、频率上以本小区独占的方式使用某些资源; 在特定时间、 空间、 频率上以与邻小区共享的方式使用某些资源; 本小区的 状态信息包括: 本小区占用的时频资源块上的负载指示。 其中, 在对本小区正在使用和 /或将要使用的资源的使用方式的声明为 独占方式的情况下, 资源协调信息进一步包括以下至少之一: 本小区赋型波 束的角度宽度信息、 本小区赋型波束的发射角度在空间上的跳变信息; 在对 本小区正在使用和 /或将要使用的资源的使用方式的声明为共享方式的情况 下, 资源协调信息进一步包括以下至少之一: 本小区在特定频 i普资源上的跳 频图案或者跳频图案编号、 本小区对特定频谱资源的占用时间图案或者时间 图案编号。 另外, 本小区的状态信息包括业务状态信息、 网络状态信息等。 而网络 状态信息又具体包括: 对邻近小区的测量量(如终端进行的切换测量量)、本 小区的负载情况、 本小区的干扰情况、 小区边缘终端的数量和业务量等; 交 互频度可以分为高时延交互和 4氏时延交互; 高时延交互可以以几十毫秒为周 期; 氏时延交互可以以几个毫秒、为周期, 比如, 每个无线子帧完成一个交互, 无线子小贞为 lms~5ms. 另外需要说明的是,当本小区无线节点同时与多組若干个邻小区无线节 点相邻时, 其交互的资源协调信息是对其相邻的多组若干个邻小区无线节点 的资源状态的综合。 (三) 步厥 S106 在该步驟中,本小区无线节点确定其自身以及若干个邻小区无线节点在 未来特定时间段内所使用的资源的操作可以为以下任一种: 操作 1 : 本小区无线节点对本小区以及邻小区的优先级进行排序; 本小 区无线节点按照优先级排序以及预定的资源分配规则, 实现对本小区以及邻 小区的资源分配, 并且优选地, 本小区无线节点在本地形成本小区及邻小区 的资源使用列表; 操作 2: 本小区无线节点对本小区以及邻小区的势进行排序; 本小区无 线节点按照对势的排序以及预定的资源分配规则, 实现对本小区以及邻小区 的资源分配, 并且优选地, 本小区无线节点在本地形成本小区及邻小区的资 源使用列表。 其中, 在操作 1中, 可以根据小区负载 (操作 1-1 )或资源利用率 (操 作 1-2 )确定小区的优先级, 这样, 优先级最高的小区为负载最重的小区或 对冲突资源块的利用率最高的小区; 而在上述的操作 2中,可以根据小区无线节点的编号或地理坐标确定小 区的势。 例如, 令编号最小 (或最大) 的小区 "势" 最大, 又例如, 可以按 照从东到西 (或从西到东)、 从南到北 (或从北到南)、 从上到下 (或从下到 上)的顺序来确定无线节点的势, 按照这个顺序排在最前面的(或最后面的) 小区其 "势" 最大。 上述的操作可以组合使用,例如,在两个小区具有相同负载时的情况下, 造作 1-1将无法实施, 此时, 可以进一步引入操作 2; 在在两个小区具有相 同资源利用率的情况下, 操作 1-2将无法实施, 此时可以进一步引入操作 2。 以下将详细描述上面提到的预定的资源分配规则。该资源分配规则可以 为: 在对本小区以及邻小区分配资源的过程中, 对于其声明使用的资源与其 他小区声明使用的资源可以在空间、 时间、 频率任一维上避免冲突的小区, 小区的无线节点在特定时间段内使用其声明的资源; 另一方面, 在对本小区 以及邻小区分配资源的过程中, 对于其声明使用的资源与其他小区声明使用 的资源在空间、 时间、 频率任一维上都存在沖突的小区, 本小区无线节点使 得存在资源声明冲突的小区中的具有最高优先级或最高势的小区占有其声明 的资源, 使得优先级低的小区放弃其声明的资源。 而对于放弃其声明的资源的小区 , 本小区在一个无线帧内,按照放弃其 声明的资源的小区的优先级顺序或势的高低, 在时间、 频率、 空间角度的资 源维上, 依据预定的时间、 频率、 角度的一种或多种组合形成的顺序, 在存 在的空余资源中查找可以满足该小区所声明的资源。 具体地, 查找资源的原 则可以是: 在没有获取到其声明的资源的小区中, 优先级最高的小区首先在 本无线帧内寻找可用资源(资源块 ), 从本无线帧的起始开始, 第一个可以满 足所述无线节点声明的资源的资源块(组)作为分配给该无线节点的资源。 而如果没有获取到其声明的资源的小区在一个无线帧中查找不到自己所声明 的资源, 将放弃资源使用声明。 通过上述的处理,可以避免小区间资源使用上的直接冲突,特别是避免 小区边缘终端间在资源使用上的冲突。 在该步骤中 ,本小区无线节点根据邻小区在本小区无线节点使用的频率 上的干扰敏感程度, 协调本小区在频率上的功率资源使用。 例如, 限制在这 些频率资源上的最大发射功率、 调整在这些频率上的用户或者业务安排等。 这样可以进一步降低小区间干扰。 进一步优选地, 在步骤 S106中, 本小区无线节点除了确定其自身以及 若干个邻小区无线节点在未来特定时间段内使用的资源, 还可以确定对资源 的使用方式。 例如, 对资源的使用方式的确定可以通过如下处理来实现: (1 )本小区 无线节点对其自身以及若干个邻小区无线节点声明的资源的使用方式进行统 计,将声明次数最多的资源使用方式作为本小区以及部小区的资源使用方式; 如果存在声明次数相等的两种或两种以上的资源使用方式, 则将具有最高优 先级或最高势的小区所声明的资源使用方式作为本小区以及邻小区的资源使 用方式; 或者 (2 )将具有最高优先级或者最高势的小区所声明的资源使用 方式作为本小区以及邻小区的资源使用方式。 在根据本发明实施例的资源协调方法中,仅以一个任意小区作为本小区 为例进行了说明, 从多个邻小区构成的总体处理形式和结果来看, 本小区无 线节点与若干个邻小区无线节点分别在不同的地理位置上, 按照根据本发明 实施例的资源协调方法, 以完全一致的处理规则对本小区及其邻小区的资源 协调信息进行处理, 在本小区挑选出的一组邻小区内, 都分别形成一个与这 组相邻关系对应的、 完全相同的资源使用列表。 即, 当上文提到的邻小区无 线节点作为本小区无线节点时, 其处理过程也如上文所述。 以下将进一步通过具体实例来描述本发明。 一种用于实施根据本发明实施例的小区间资源协调方法的无线接入网 如图 2所示, 其中包括: 无线节点 201a~201g, 两个无线终端 202a和 202b。 每个无线节点分别覆盖不同的小区, 每个小区的中心区域(阴影区域) 的频 率复用系数为 1。 在各个小区的边缘区域, 采用 1/3 的频率复用系数实现覆 盖。无线终端 202a处于无线接入点 201a覆盖小区的边缘区域,无线终端 202b 处于无线接入点 201g覆盖小区的边缘区域。 在网络规划中, 假设其编号分 别为: 无线节点 201a--->2000-001 无线节点 201b--->2000-002 无线节点 201 c— ->2000-003 无线节点 201d--->2000-004 无线节点 201e— >2000-005 无线节点 201f— >2000-006 无线节点 201g— >2000-007 在上述系统中,使用根据本发明实施例的小区间的资源协调方法进行资 源协调。 首先,例如,在时间区间 1内 ,每个无线节点首先确定自己的相邻关系, 这里, 每个无线节点都选择七个邻近的基站作为其邻近基站, 也就是 N=7 , 并且, 对于各个无线节点, N都是 7; 然后,每个无线节点确定自己覆盖的区域内是否存在小区边缘终端。无 线节点 201a ■据无线终端 202a上 4艮的用于切换的 RSRP ( Reference symbol received power )测量量,确定无线终端 202a是边缘终端(因为无线终端 202a 上报的 RSRP中包含两个超过强度预设门限的邻小区的导频:),而且这个边缘 终端 202a的位置是处于本小区与无线接入点 201g覆盖小区、无线接入点 201f 覆盖小区的交界附近(因为无线终端 202a上报的无线接入点 201g、 无线接 入点 201f的 RSRP的强度超过预设门限 );与无线节点 201a的过程和方法一 样, 无线节点 201g根据无线终端 202b上报的用于切换的 RSRP ( Reference symbol received power )测量量, 确定无线终端 202b是边缘终端, 而且这个 边缘终端 202b的位置是处于本小区与无线接入点 201g覆盖小区、 无线接入 点 201f覆盖小区的交界附近。 接下来, 例如, 在时间区间 2内, 为了让无线终端 202a以高速率向其 月 务节点无线节点 201a发送数据, 无线节点 201a声明使用属于无线接入点 201g、无线接入点 201f用于小区边缘覆盖的资源块(如图 3所示,在图 3中, 所标注的 "服务小区"即为 "本小区",所标注的 "邻近小区"即为 "邻小区"), 并且通过 X2 接口把这个资源使用声明发往无线接入点 201g、 无线接入点 201f; 为了让无线终端 202b以高速率向其服务节点无线节点 201g发送数据, 无线节点 201g声明使用属于无线接入点 201a、 无线接入点 201f用于小区边 缘覆盖的资源块(如图 3所示), 并且通过 X2接口把这个资源使用声明发往 无线接入点 201a、 无线接入点 201f; 在这个过程 (时间区间 2 )内, 无线节点 201f同样把自己不使用任何频 i普资源的信息发往无线接入点 201a、 无线接入点 201g等邻近小区。 最后, 例如, 在时间区间 3内, 进行小区间资源协调。 由于无线接入点 201a、 无线接入点 201g 自身声明的资源与对方声明的资源冲突, 于是根据 上文所述的预定的资源分配规则 (或者称为冲突仲裁机制) 中的具体操作进 行调解。 例如, 可以采用上文中提到的操作 2。 这样, 无线接入点 201a、 无线接 入点 201g根据各自的编号来确定其 "势", 这里采用的原则是: 无线节点的 序号越小, 则其 "势" 就越大。 无线节点 201a的编号是 2000-001 , 无线节 点 201g的编号是 2000-007,因此,无线节点 201a的 "势"大于无线节点 201g 的 "势", 因此, 由无线节点 201a使用其声明的资源, 而无线节点 201g则 可以把本无线帧的第一个可以满足其资源使用声明的资源块集合中的对应资 源块作为自己在未来使用的资源。 经过冲突处理后, 无线接入点 201a、 无线接入点 201g获得资源的情况 如图 4所示 (在图 4 中, 所标注的 "月艮务小区" 即为 "本小区", 所标注的 "4)5近小区" 即 "4p小区" )。 上述实例描述的是 4巴各个无线节点用于小区边缘覆盖的资源块的协调 给边缘区域的终端的情况, 但是本发明所述方法同样可以用于把无线接入网 的整个频带上的资源块协调给边缘区域的终端的情况。 另外, 上述实例是以 上行传输用资源的协调为例给出的实现方法, 但是本发明提供的方法同样可 以用于小区间的下行资源 1办调。 综上所述, 借助于本发明, 通过小区间的交互, 可以使得小区自主地确 定其在未来特定时间内的资源使用和工作模式, 既可以实现在无线接入网的 整个频带上对小区间的资源进行动态协调, 也可以在特定的部分频带上对小 区间的资源进行动态协调, 从而可以使小区边缘终端的可用资源扩展到整个 系统频带, 实现小区间资源配置的优化、 系统吞吐量的优化, 进而可以提升 无线终端的和传输速率。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人 来说, 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种小区间的资源协调方法, 用于小区间的空间、 时间、 频率、 以及功 率资源的协调, 其特征在于, 包括:
本小区无线节点确定与其相邻的若干个邻小区无线节点; 所述本小区无线节点与其确定的所述若干个邻小区无线节点进行 资源协调信息的交互;
基于所述资源协调信息的交互,所述本小区无线节点确定其自身以 及所述若干个邻小区无线节点在未来特定时间段内所使用的资源。
2. 根据权利要求 1所述的方法, 其特征在于, 所述本小区无线节点通过以 下操作中的任一种来确定所述邻小区无线节点:
根据网絡规划, 以所述本小区无线节点为中心 , 将与所述本小区无 线节点的距离小于预定 3巨离的无线节点作为所述邻小区无线节点;
将所述本小区无线节点覆盖的区域内的无线终端测量到的信号强 度超过阁值的无线节点作为所述邻小区无线节点。
3. 根据权利要求 1所述的方法, 其特征在于,
所述资源协调信息包括以下任一种及其组合:对本小区正在使用和 /或将要使用的资源声明、对所述本小区正在使用和 /或将要使用的资源的 使用方式的声明、 所述本小区的状态信息。
4. 根据权利要求 3所述的方法, 其特征在于,
所述本小区正在使用和 /或将要使用的资源声明包括以下任一种及 其组合: 所述本小区占用的时频资源块的时间和频率位置、 所述本小区 占用的时频资源块的发射空间方位或 /和覆盖角度宽度、 所述本小区占用 的时频资源块的功率配置;
所述本小区正在使用和 /或将要使用的资源的使用方式的声明包括 对如下使用方式的声明: 在特定时间、 空间、 频率上以所述本小区独占 的方式使用某些资源; 在特定时间、 空间、 频率上以与邻小区共享的方 式使用某些资源; 所述本小区的状态信息包括:本小区占用的时频资源块上的负载指 示
5. 根据权利要求 4所述的方法, 其特征在于,
在对所述本小区正在使用和 /或将要使用的资源的使用方式的声明 为独占方式的情况下, 所述资源协调信息进一步包括以下至少之一: 本 小区赋型波束的角度宽度信息、 本小区赋型波束的发射角度在空间上的 跳变信息;
在对所述本小区正在使用和 /或将要使用的资源的使用方式的声明 为共享方式的情况下, 所述资源协调信息进一步包括以下至少之一: 所 述本小区在特定频谱资源上的跳频图案或者跳频图案编号、 所述本小区 对特定频讲资源的占用时间图案或者时间图案编号。
6. 根据权利要求 1所述的方法, 其特征在于, 所述本小区无线节点确定其 自身以及所述若干个邻小区无线节点在未来特定时间段内所使用的资源 的操作包括以下任一种:
所述本小区无线节点对所述本小区以及所述邻小区的优先级进行 排序; 所述本小区无线节点按照优先级排序以及预定的资源分配规则, 实现对所述本小区以及所述邻小区的资源分配;
所述本小区无线节点对所述本小区以及所述邻小区的势进行排序; 所述本小区无线节点按照对势的排序以及所述预定的资源分配规则 , 实 现对所述本小区以及所述邻小区的资源分配。
7. 根据权利要求 6所述的方法, 其特征在于, 所述预定的资源分配规则为: 在对所述本小区以及所述邻小区分配资源的过程中,对于其声明使 用的资源与其他小区声明使用的资源可以在空间、 时间、 频率任一维上 避免冲突的小区, 所述小区的无线节点在所述特定时间段内使用其声明 的资源;
在对所述本小区以及所述邻小区分配资源的过程中,对于其声明使 用的资源与其他小区声明使用的资源在空间、 时间、 频率任一维上都存 在冲突的小区, 所述本小区无线节点使得存在资源声明冲突的小区中的 具有最高优先级或最高势的小区占有其声明的资源, 使得优先级^ ί氐的小 区放弃其声明的资源。
8. 根据权利要求 7所述的方法, 其特征在于, 对于放弃其声明的资源的小 区, 所述本小区在一个无线帧内, 按照放弃其声明的资源的小区的优先 级顺序或势的高低, 在时间、 频率、 空间角度的资源维上, 依据预定的 时间、 频率、 角度的一种或多种组合形成的顺序, 在存在的空余资源中 查找可以满足该小区所声明的资源。
9. 根据权利要求 6至 8中任一项所述的方法, 其特征在于,
冲艮据小区负载或资源利用率确定所述本小区和所述邻小区的优先 级, 其中, 所述优先级最高的小区为负载最重的小区或对沖突资源块的 利用率最高的小区;
才艮据所述本小区无线节点以及所述邻小区无线节点的编号或地理 坐标确定所述本小区和所述邻小区的势。
10. 根据权利要求 6至 8中任一项所述的方法, 其特征在于, 进一步包括: 所述本小区无线节点在本地形成所述本小区及所述邻小区的资源 使用列表。
11. 根据权利要求 1至 8中任一项所述的方法, 其特征在于, 进一步包括: 所述本小区无线节点根据所述邻小区在所述本小区无线节点使用 的频率上的干扰敏感程度, 协调所述本小区在所述频率上的功率资源使 用。
12. 根据权利要求 1至 8中任一项所述的方法, 其特征在于, 进一步包括: 所述本小区无线节点确定其自身以及所述若干个邻小区无线节点 在未来特定时间段内对所述资源的使用方式;
具体为如下操作: 所述本小区无线节点对其自身以及所述若干个邻小区无线节点声 明的资源的使用方式进行统计, 将声明次数最多的资源使用方式作为所 述本小区以及所述邻小区的资源使用方式; 如果存在声明次数相等的两 种或两种以上的资源使用方式, 则将具有最高优先级或最高势的小区所 声明的资源使用方式作为所述本小区以及所述邻小区的资源使用方式; 或者 将具有最高优先级或者最高势的小区所声明的资源使用方式作为 所述本小区以及所述邻小区的资源使用方式。 根据权利要求 1至 8中任一项所述的方法, 其特征在于, 当所述本小区 无线节点同时与多组所述若干个邻小区无线节点相邻时, 其交互的所述 资源协调信息是对其相邻的所述多组所述若干个邻小区无线节点的资源 状态的综合。
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