JP2011505731A - Coordinating resources between cells - Google Patents

Abstract

The present invention provides a method of coordinating resources between cells for coordinating space, time, frequency, and power resources between cells.
[Solution]
The method includes a step S102 in which the radio node of this cell determines radio nodes of some adjacent cells in the vicinity, and the radio node of this cell is determined by the radio nodes of some adjacent cells that have been determined. Based on the step S104 for exchanging resource coordination information and the exchange of resource coordination information, the radio node of this cell and the radio nodes of some adjacent cells are now used within a specific time interval. Step S106 for determining the resource to be included is included.
[Selection] Figure 1

Description

  The present invention relates to the field of communications, and more particularly, to a method for coordinating resources between cells for coordinating space, time, frequency, and power resources between cells.

  Soft frequency reuse technology is an important way to resolve inter-cell interference. The technique divides all subcarriers in an OFDM (Orthogonal Frequency Division Multiple) system into m sets, and different neighboring cells use different sets of subcarriers as their main subcarriers. The carrier is its own sub-subcarrier, a different launch power threshold is set for the main subcarrier and sub-subcarrier of each cell, and the launch power threshold of the main subcarrier is higher than that of the sub-subcarrier. Determine cell boundaries based on coverage. It is the main subcarrier that is allocated from the center of the cell to the edge region and can cover the entire range of the cell. Therefore, since data is transmitted mainly to the inside of the cell by the low power sub-subcarrier and the distance from the base station is short, the terminal can receive a clear signal of this cell, Since the power of the subcarrier is small, the interference between adjacent cells is also small. However, in the edge area of each adjacent cell, data is transmitted by a high-power main subcarrier, and a terminal located in the edge area receives a main subcarrier of a different adjacent cell, and a different neighboring cell. Since the main subcarriers of the matching cells are orthogonal without overlapping, the interference between them is greatly reduced.

  For example, the Chinese patent application of CN200510068133 whose title is "Method of coordinating interference between cells by planning power for OFDM mobile communication system" and title "Coordination method of uplink interference in single frequency network, The CN200610087983 Chinese patent application “base station, terminal and network” is a technology for coordinating interference between cells, which is submitted based on the principle of soft frequency reuse as described above. A feature of the two techniques is that a specific time frequency block is assigned to a wireless terminal in the edge region, and the control of interference between cells is controlled by combining power control.

  The technology for coordinating inter-cell interference, which is being considered by the 3rd generation mobile communication long term evolution system standardization organization (3GPP LTE), is described in “Way forward on UL ICIC / Overload Indicator for LTE: It is embodied in "Standardization research direction of interference coordination and overload indicator between uplink cells in long term evolution system". In technical proposal R1-074477, proactive approach ("pro-active approach") and overload indicator (abbreviated as OI) independent of "pro-active approach" used for uplink power control are proposed. did.

  The basic idea of the proactive approach is that each of the adjacent instruction information X indicating that the service eNode B is to be used by the UE (User Equipment) in the border area from the service eNode B via the X2 interface. e Transmit to Node B to generate BPRBs of strong interference between cells, and these BPRBs become PRBs that are sensitive to the interference of neighboring cells. The eNode B that has received the instruction information X avoids dispatching UEs in the edge region of this cell within the frequency range indicated by the instruction information X as much as possible, that is, interference is generated within the sensitive frequency range. Avoid as much as possible.

  The basic idea of the overload indicator is to transmit OI information including uplink carrier information during physical resource block level operation and receive the OI via the X2 interface to control uplink power. E Node B reaction form.

  In the above proactive approach and overload indicator, only the edge region wireless terminals can be assigned only a part of the predefined frequency spectrum resources in the entire frequency spectrum of the system, so that the edge region wireless terminals can be used. This limits the bandwidth and affects the transmission rate of the wireless terminal.

  The present invention was submitted in view of the problem that the available bandwidth of wireless terminals existing in the proactive approach and overload indicator of the prior art is limited and the exchange of control signals between cells is increased. Therefore, an object is to provide a resource coordination mechanism between cells.

  The present invention provides a method for coordinating resources between cells for coordinating space, time, frequency, and power resources between cells.

  The radio node of this cell determines the radio nodes of some adjacent cells in the vicinity, and the radio node of this cell exchanges resource coordination information with the radio nodes of some determined adjacent cells. Based on the exchange of resource coordination information, the radio node of this cell determines the resources that the radio node of this cell and the radio nodes of some adjacent cells will use from now on within a specific time interval.

  According to the network plan, the radio node of this cell is an operation in which the radio node whose distance from the radio node of this cell is less than the planned distance is set as the radio node of the adjacent cell, centering on the radio node of this cell According to the network plan, the wireless node of this cell is centered around one of the operations of setting the wireless node whose distance from the wireless node of this cell is less than the planned distance to the wireless node of the adjacent cell. It is preferable to determine the radio node of the cell.

  Furthermore, the resource coordination information includes a statement regarding the resource that the cell is using and / or intending to use, a statement regarding the use form of the resource that is being used and / or intended by the cell, and status information of the cell. It is preferable to include any one of and combinations thereof.

  Here, the statement regarding the resources that the cell is using and / or intends to use is as follows: the time and frequency position of the time frequency resource block occupied by the cell, and the launch space orientation of the time frequency resource block occupied by the cell or / And a usage angle of the resource that the cell is using and / or intending to use, including any one of the range of the cover angle and the power allocation of the time-frequency resource block occupied by the cell and a combination thereof. Makes a statement regarding the use of resources in a form that the cell monopolizes at a specific time, space, and frequency, and the use of resources in a form that is shared with neighboring cells at a specific time, space, and frequency. The cell state information includes a load indication on the time-frequency resource block occupied by the cell. Among these, if the statement regarding the use form of the resource being used by the cell and / or the resource to be used is a monopoly form, the resource coordination information includes the angle width information of the beam shaped by the cell, and the shaping by the cell. Resource coordination information if the statement about the usage of the resource that this cell is using and / or intending to use is shared, including at least one of the jump information in the space of the launched beam launch angle Furthermore, it includes at least one of a frequency hopping pattern or frequency hopping pattern number in the specific spectrum resource of the cell and a time pattern or time pattern number in which the cell occupies the specific spectrum resource.

  Specifically, the operation of the radio node of this cell to determine the resources that the radio node of this cell and a few adjacent cell nodes intend to use within a specific time interval from now on is performed by the radio node of this cell. The priority order of the main cell and the neighboring cell is arranged, and the radio node of the main cell allocates the resources of the main cell and the adjacent cell according to the priority order and the scheduled resource allocation rule, or the radio node of the main cell. Includes arranging the potential of the cell and the neighboring cell, and the radio node of the cell allocating resources of the cell and the neighboring cell according to the arrangement of the potential and a predetermined resource allocation rule. .

  Among them, the scheduled resource allocation rule is that in allocating resources to this cell and neighboring cells, any dimension of space, time, and frequency between the resource that is declared to be used and the resource that is declared to be used by another cell. In the case of a cell that can avoid collisions in the cell, the radio node of the cell uses the declared resource and allocates the resource to this cell and the neighboring cell within a specific time interval. In the case of a cell that collides with a resource declared by another cell in any dimension of space, time, and frequency, the radio node of this cell becomes the cell having the highest priority or highest potential in the cell that collides with the resource statement. To occupy the stated resource and to give up the declared resource to a low priority cell.

  For a cell that has abandoned the declared resource, this cell shall, in one radio frame, follow the priority and potential level of the cell that has abandoned the declared resource in the resource dimension of time, frequency, and spatial angle, and the scheduled time, frequency Based on the order of the combination of one type or a plurality of types of angles, the resource that satisfies the statement of this cell is searched from the idle resources.

  In the above processing, the priority order of the main cell and the adjacent cells is determined based on the load or resource utilization rate of the cell, and the utilization rate of the cell with the highest load or the resource block that collides with the highest priority cell. Is the best cell, and the potential of the present cell and the adjacent cell can be determined based on the radio node number of the present cell and the radio node number or geographical coordinates of the adjacent cell.

  Preferably, the resource coordination method according to an embodiment of the present invention further includes a step in which a radio node of the cell locally forms a resource usage list of the cell and an adjacent cell.

  In the resource coordination method according to the embodiment of the present invention, the radio node of the cell uses power resources at the frequency of the cell based on the degree of interference sensitivity of an adjacent cell at the frequency used by the radio node of the cell. Preferably further comprising the step of coordinating.

  Furthermore, the resource coordination method according to the embodiment of the present invention includes a step in which the radio node of the present cell determines a resource usage pattern within a specific time interval of the radio node of the cell and a few adjacent cells. In addition, the specific operation includes that the radio node of this cell statistics the usage pattern of resources declared by itself and a few adjacent radio nodes of the cell, and determines the resource usage pattern of the highest number of statements When there are two or more resource usage patterns with the same number of statements, the resource usage pattern declared by the cell with the highest priority or highest potential As the resource usage mode, or the resource usage mode declared by the cell having the highest priority or the highest potential, the resource usage mode of this cell and the adjacent cell is used. Is Rukoto.

  Then, when the radio node of this cell is adjacent to a plurality of adjacent radio nodes of a plurality of adjacent cells at the same time, the resource coordination information to be exchanged is the number of adjacent radio nodes of a plurality of adjacent adjacent cells. It is a comprehensive resource status.

  The present invention is adapted not only to the coordination of uplink transmission resources but also to the coordination of downlink transmission resources, and is used for resource coordination in a time division duplex system, and is also used for resource coordination in a frequency division duplex system. In accordance with the present invention, through cell-to-cell exchange, resources between cells at all frequencies of the radio access network are dynamically determined by allowing the cells themselves to determine resource utilization and operating modes within a specific time interval. Can coordinate and dynamically coordinate resources between cells at some specific frequencies, extending the available resources of terminals in the cell edge area to the frequencies of the entire system, The transmission rate can be improved.

  Other features and advantages of the invention will be set forth in the specification, will be more apparent from the description, or may be further understood by practice of the invention. The objectives and other advantages of the invention may be realized and obtained by the structure particularly pointed out in the written description and claims hereof as well as the drawings.

The following drawings are for further understanding of the present invention and constitute a part of the contents of the present application. The illustrative examples and description of the invention are illustrative of the invention and are not unduly limiting of the invention.
These are the flowcharts of the coordination method of the resource between the cells concerning the Example of this invention. 1 is a diagram illustrating a radio access network for coordination of resources between cells according to an embodiment of the present invention. These are figures which show private use of the resource statement concerning the Example of this invention. These are figures which show the acquisition condition of each cell after arrangement | positioning of the collision resource concerning the Example of this invention.

  As described above, the current proactive approach and the overload indicator have a problem that affects the transmission rate of the wireless terminal by limiting the available bandwidth of the wireless terminal. The embodiment provides a method of coordinating resources between cells that determines the use of the next resource by exchanging information between cells.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. It should be noted that the preferred embodiments described herein are for explaining and interpreting the present invention and are not intended to limit the present invention.

  According to an embodiment of the present invention, a method for coordinating resources between cells is provided. While this method can be used for the coordination of uplink resources between cells, it can also be used for the coordination of downlink resources between cells. Further, it can be used not only for resource coordination in a time division duplex system, but also for resource coordination in a frequency division duplex system. The wireless node referred to in the present application may be a complete base station including a feedback unit, a baseband processing unit, and a radio resource management unit, or a remote relay unit in a distributed base station. May be. When the wireless node is a remote relay unit in a distributed base station, transmission of resource coordination information and allocation of resources between the wireless nodes or cells are related units in a baseband processing unit (BBU) located in the distributed base station To complete.

  First, as shown in FIG. 1, a method for coordinating resources between cells according to an embodiment of the present invention includes the following steps.

  The radio node of this cell determines (for example, selects) a certain number of radio nodes of neighboring cells adjacent to it. Here, the radio node of this cell can be a radio node of an arbitrary cell (step S102).

  Resource coordination information is exchanged between the radio node of this cell and the radio nodes of the determined number of adjacent cells (step S104).

  The radio node of this cell determines the resources that the radio node of this cell and a few adjacent cells will use from now on in a specific time interval, or the radio node of this cell further determines the usage pattern of these resources. It is preferable to confirm (step S106).

  For example, step S102 can be executed in the first time interval, step S104 can be executed in the second time interval, and step S106 can be executed in the third time interval. Further, the first to third time intervals may be continuous in time or may not be continuous. For example, a time interval for retransmitting information such as a resource usage statement between wireless nodes (or between cells) may be sandwiched between the second time interval and the third time interval.

  Hereinafter, each of the above steps will be further described.

(1) Step S102
In this step, there are several methods for determining adjacent wireless nodes as follows.

  As a method 1, based on the geographical position of the wireless node according to the network plan, the N wireless nodes whose distance from the wireless node of the cell is less than a predetermined distance are adjacent to the wireless node of the cell. Match nodes. Usually, N is a natural number of 2 to 7, and is specifically determined by a frequency reuse parameter used for frequency planning of the network.

  As a method 2, a wireless node in which the measurement amount of a wireless terminal located in an edge region in an area covered by the wireless node of this cell exceeds a threshold (predetermined threshold) is set as an adjacent node. Usually, the measurement amount of the wireless terminal is an RSRP (Reference symbol received power) measurement amount for switching of the “edge region UE”. In general, the stronger the RSRP, the stronger the interference of the signal emitted by the adjacent cell to the terminal, and the stronger the interference of the emission signal from the wireless terminal to the wireless node of the adjacent cell.

(2) Step S104
In this step, the mode of exchange between the radio node of this cell and the node of the adjacent cell includes “exchange via a backhaul (BACKHAULL) path between radio nodes and via an air interface”. An exchange is included.

  The exchanged resource coordination information includes a statement regarding the resource that the cell is using and / or intending to use (where resource includes one or more of space, time, frequency and power resources) It may include any one and a combination of a statement regarding a usage mode of a resource that is being used by a cell and / or a cell and status information of the cell.

  Here, depending on the path resource, resource coordination refers to whether a launch or reception path of an adjacent cell can be serviceably arranged in a terminal of an adjacent cell. For example, when the wireless node A lends a part of the frequency resource b of this cell to a terminal in an adjacent cell, there are two types of lending. One of them is lending b to a user in the edge area of an adjacent cell, and at the same time, a wireless terminal located in the central area of this cell receives the service provided from the wireless node of this cell as it is via b. At this time, since the launch or reception path resource at b of the radio node of this cell is still occupied by the UE of this cell, the launch or reception path resource at b cannot be lent to neighboring cells. . The other is that after wireless node A lends b to a user in the edge area of an adjacent cell, the wireless terminal of this cell does not use b, in this case, the launch or reception at wireless node A's b Path resources can be used for neighboring cells.

  Specifically, the statement of the resource that the cell is using and / or intending to use includes the time and frequency position of the time frequency resource block occupied by the cell and the emission space of the time frequency resource block occupied by the cell. It includes any one of the orientation and / or the width of the cover angle and the power arrangement of the time-frequency resource block occupied by the cell and a combination thereof. Statements on the usage of resources that this cell is using and / or intending to use are available in the form that the cell monopolizes in a specific time, space, and frequency and in the specific time, space, and frequency. Includes a statement on how to use resources in a shared form with neighboring cells. The state information of this cell includes a load instruction in the time frequency resource block occupied by this cell.

  Among them, when the statement regarding the use form of the resource being used by the cell and / or the resource to be used is a monopoly form, the resource coordination information includes the angle width information of the beam shaped by the cell, and the shaping by the cell. And at least one of jump information in the space of the launched beam launch angle. If the statement regarding the usage mode of the resource that the cell is using and / or intends to use is a shared format, the resource coordination information includes the frequency hopping pattern or frequency hopping pattern number in the specific frequency spectrum resource of the cell, and Including at least one of a time pattern or a time pattern number in which the cell occupies a specific frequency spectrum resource.

  The status information of this cell includes service status information, network status information, and the like. In addition, the network state information includes the measurement amount of adjacent cells (for example, the switching measurement amount performed by the terminal), the load status of this cell, the interference status of this cell, the number of edge region terminals of the cell, and the service. Includes details such as quantity. The frequency of exchange can be divided into high time delay exchange and low time delay exchange. The exchange of high time delays is performed with a period of several tens of milliseconds, and the exchange of low time delays is performed with a period of several milliseconds, for example, when each radio subframe performs one exchange, the radio subframe is 1 ms to 5ms.

  Here, when the radio node of this cell is adjacent to the radio nodes of a few adjacent cells of a plurality of sets at the same time, the resource coordination information to be exchanged is the radio nodes of a few adjacent cells of the adjacent multiple sets. It is a total of the resource status of.

(3) Step S106
In this step, the operation in which the radio node of this cell and the radio nodes of a few neighboring cells determine the resources to be used in a specific time period from now on can be any of the following.

  As operation 1, the radio node of this cell arranges the priorities of this cell and neighboring cells. The radio node of this cell allocates resources of this cell and adjacent cells according to the priority and scheduled resource allocation rules, and the radio node of this cell is locally used by the resources of this cell and adjacent cells. Preferably a list is formed.

  As operation 2, the radio node of this cell arranges the potential of this cell and neighboring cells. The radio node of this cell allocates resources of this cell and neighboring cells according to the potential arrangement and the scheduled resource allocation rules, and the radio node of this cell is local and the resources of this cell and neighboring cells are local. It is preferable to form a usage list.

  Among them, in the operation 1, since the cell priority can be determined based on the cell load (operation 1-1) or the resource utilization rate (operation 1-2), the cell with the highest priority is loaded. The heaviest cell or the cell with the highest utilization of collision resource blocks.

  In the above operation 2, the cell potential can be determined based on the cell's wireless node number or geographical coordinates. For example, the “potential” of the smallest (or highest) numbered cell can be maximized and, for example, east to west (or west to east), south to north (or north to south) The potential of the radio node can be determined according to the order from top to bottom (or bottom to top), and the “potential” of the cells arranged at the forefront (or the end) according to such an order is maximum.

  The above operations can be used in combination.For example, if two cells have the same load, operation 1-1 cannot be executed, so in this case, introduce operation 2. Can do. If two cells have the same resource utilization, operation 1-2 cannot be performed, so operation 2 can be introduced.

  Hereinafter, the scheduled resource allocation rule will be described in detail. The resource allocation rule avoids collisions in the space, time, and frequency dimensions between the resource that is declared when used and the resource that is declared when used by another cell in the process of allocating resources to this cell and adjacent cells. In the process of assigning resources to this cell and neighboring cells, the cell's radio node uses the resources declared within a specific time interval, while the cell's radio node uses the resources declared in other cells. If the resource that is declared to be used is a cell that collides in any dimension of space, time, and frequency, the radio node of this cell assigns the cell with the highest priority or highest potential in the cell that collides with the resource statement. To occupy the declared resource, and to give up the declared resource to a low priority cell.

  For a cell that has abandoned the declared resource, this cell shall, in one radio frame, have a scheduled time, with a resource dimension of time, frequency, spatial angle, according to the priority or potential level of the cell that has abandoned the declared resource, Based on the order formed by a combination of one type or a plurality of types of frequency and angle, a resource that satisfies the statement of this cell is searched from idle resources. Specifically, the principle of searching for resources is that the cell with the highest priority in the cell that could not obtain the stated resource searches for resources (resource blocks) that can be used in this radio frame, and A resource block (set) of resources satisfying the first statement of the wireless node from the start position is set as a resource to be allocated to the wireless node. If a cell that cannot obtain the stated resource cannot find the resource it has declared in one radio frame, it abandons the resource usage statement.

  By the above processing, it is possible to avoid a direct collision in resource utilization between cells, and in particular, it is possible to avoid a collision in resource utilization between edge region terminals of the cell.

  In this step, the radio node of this cell coordinates power resources at the frequency of this cell based on the degree of interference sensitivity of the radio node of the adjacent cell at the frequency used by the radio node of this cell. For example, limit the maximum launch power on these frequency resources, or coordinate user or service arrangements on these frequencies. Thereby, the interference between cells can be further reduced.

  Further, in step S106, it is preferable that the radio node of this cell decides the resource that the radio node of this cell and the adjacent cell intends to use within a specific time period from now on, and also decides the resource usage form. .

  For example, the determination of the resource usage form can be realized through the following steps. (1) The radio node of this cell statistically analyzes the resource usage form declared by itself and the radio node of the neighboring cell, and the resource usage form that has been most frequently declared is the resource usage of this cell and the neighboring cell. If there are two or more types of resource usage that have the same number of statements, the resource usage that the cell having the highest priority or the highest potential has declared is the resource usage of this cell and the adjacent cell. . Or, (2) the resource utilization form declared by the cell having the highest priority or the highest potential is set as the resource utilization form of the main cell and the adjacent cell.

  In the resource coordination method according to the embodiment of the present invention, an arbitrary cell has been described as a main cell. However, in view of the total processing form including a plurality of adjacent cells and the result thereof, the wireless node of this cell is slightly adjacent. The radio nodes of the cell are located in different geographical locations, and the resource coordination method according to the embodiment of the present invention processes the resource coordination information of the cell and the neighboring cell according to the completely consistent processing rule, and In a selected set of adjacent cells, a resource usage list was created in which the adjacent relationship with the set is completely the same. That is, when the wireless node of the adjacent cell described above is the wireless node of this cell, the processing process is the same as described above.

  Hereinafter, the present invention will be described in more detail with reference to specific examples.

  As shown in FIG. 2, the radio access network for implementing the inter-cell resource coordination method according to the embodiment of the present invention includes radio nodes 201a to 201g and two radio terminals 202a and 202b. Each wireless node covers a different cell, and the frequency reuse parameter of 1 in the center area (shaded area) of each cell is 1. The edge area of each cell is covered using 1/3 frequency reuse parameter. The wireless terminal 202a is located in the edge region of the cell covered by the wireless access point 201a, and the wireless terminal 202b is located in the edge region of the cell covered by the wireless access point 201g. In network planning, set these numbers as follows.

Wireless node 201a ---> 2000-001
Wireless node 201b ---> 2000-002
Wireless node 201c ---> 2000-003
Wireless node 201d ---> 2000-004
Wireless node 201e ---> 2000-005
Wireless node 201f ---> 2000-006
Wireless node 201g ---> 2000-007
In the above system, resource coordination is performed by a resource coordination method between cells according to an embodiment of the present invention.

  First, for example, in time interval 1, each wireless node determines its adjacent relationship, where each wireless node selects seven adjacent base stations to be adjacent base stations, that is, N = 7 N is 7 for each wireless node.

  After that, each wireless node determines whether or not there is a terminal in the cell edge area within the area covered by itself. Based on the RSRP (Reference symbol received power) measurement for switching reported from the wireless terminal 202a, the wireless node 201a is scheduled to have a strength in the terminal area (RSRP reported from the wireless terminal 202a). 2), and the location of the terminal 202a in the edge area is located in the cell covered by this cell and the wireless access point 201g. Located near the boundary with the cell covered by the wireless access point 201f (because the RSRP strength of the wireless access point 201g and the wireless access point 201f reported by the wireless terminal 202a exceeds a predetermined threshold) Similar to the process and method of the wireless node 201a, the wireless node 201g transmits the RSRP (Referenc) for switching reported by the wireless terminal 202b. e symbol received power), based on the measured amount, the wireless terminal 202b is a terminal in the edge area, and the position of the terminal 202b in the edge area is located in a cell covered by the present cell and the wireless access point 201g; It is determined to be located near the boundary with the cell covered by the wireless access point 201f.

  Next, for example, in time interval 2, the wireless node 201a transmits data to the wireless access point 201g and the wireless access point 201f so that the wireless terminal 202a transmits data at a high rate to the wireless node 201a that provides the service. Declares the use of resource blocks that cover the edge area of the cell to which it belongs (see FIG. 3, where “service cell” is “this cell” and “neighbor cell” is “adjacent cell”) The resource usage statement is transmitted to the wireless access point 201g and the wireless access point 201f through the X2 interface.

  The wireless node 201g covers the edge areas of the cells belonging to the wireless access point 201a and the wireless access point 201f so that the wireless terminal 202b can transmit data at a high rate to the wireless node 201g that is a node providing the service. The resource usage statement is transmitted (see FIG. 3), and the resource usage statement is transmitted to the wireless access point 201a and the wireless access point 201f via the X2 interface.

  In the process (time interval 2), the wireless node 201f also transmits information indicating that it does not use any spectrum resources to neighboring cells such as the wireless access point 201a and the wireless access point 201g.

  Finally, for example, in time interval 3, resource coordination between cells is performed. Since the resources declared by the wireless access point 201a and the wireless access point 201g and the resources declared by the other party collide with each other, mediation is performed by performing a specific process according to the scheduled resource allocation rule (or collision arbitration mechanism) as described above. To do.

  For example, it can be performed using the operation 2 described above. In this way, the wireless access point 201a and the wireless access point 201g establish the “potential” based on their own numbers, and here, the principle that the smaller the wireless node number is, the larger the “potential” is. Since the wireless node 201a has a number 2000-001 and the wireless node 201g has a number 2000-007, the “potential” of the wireless node 201a is larger than the “potential” of the wireless node 201g. Therefore, the wireless node 201a uses the resource that it has declared, and the wireless node 201g has now selected the corresponding resource block in the first set of resource blocks that can satisfy its resource usage statement in the wireless frame. It can be a resource to be used from.

  FIG. 4 shows the resource status acquired by the wireless access point 201a and the wireless access point 201g after the collision process (in FIG. 4, the “service cell” is “this cell” and the “neighbor cell” is “ Adjacent cells ”).

  In the above embodiment, the case where the resource block covering the edge area of the cell of each radio node is coordinated with the terminal in the edge area has been described. However, the method according to the present invention is applied to all frequency areas of the radio access network. This is also applicable when a resource block is coordinated with a terminal in an edge area. In the above embodiment, the implementation method has been described taking the coordination of uplink transmission resources as an example, but the method according to the present invention is also suitable for coordination of downlink resources between cells.

  Generally speaking, the present invention allows cells at all frequencies of a radio access network to be determined by determining the resources and mode of operation that they are going to use within a specific time interval through the exchange between cells. To enable dynamic coordination of resources between cells, and dynamic coordination of resources between cells at certain specific frequencies, so that the resources available to terminals in the cell edge region can As a result, the resource allocation between cells and the throughput of the system can be improved, and the transmission rate of the wireless terminal can be improved.

  What has been described above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It will be readily apparent to those skilled in the art that many changes and modifications can be made without departing substantially from the novel features and advantages of the invention. Accordingly, all such modifications are intended to be included in the scope of the present invention.

Claims (13)

A method of coordinating resources between cells for coordinating space, time, frequency, and power resources between cells,
The radio node of this cell establishes a few adjacent radio nodes of the cell,
The radio node of the cell performs resource coordination information exchange with the determined number of radio nodes of the adjacent cells,
Based on the exchange of the resource coordination information, the radio node of the present cell determines the resources that the radio node of the cell and the radio cells of the some neighboring cells are to use within a specific time period from now on. A method for coordinating resources between cells. In claim 1,
The radio node of the cell is
According to the plan of the network, with the wireless node of the main cell as a center, an operation of setting a wireless node whose distance from the wireless node of the main cell is less than a predetermined distance as a wireless node of the adjacent cell;
The operation of setting the wireless node whose signal strength measured by the wireless terminal in the region covered by the wireless node of the main cell exceeds a threshold as the wireless node of the adjacent cell is the adjacent node. A method of coordinating resources between cells, characterized by determining radio nodes of matching cells. In claim 1,
The resource coordination information includes a statement regarding resources used and / or intended to be used by the cell, a statement regarding usage forms of resources currently being used and / or used by the cell, and status information of the cell. A method for coordinating resources between cells, including any one of and a combination thereof. In claim 3,
The statement regarding the resources that the cell is using and / or intending to use includes the time and frequency position of the time-frequency resource block occupied by the cell and the launch space orientation of the time-frequency resource block occupied by the cell or / And any one of the width of the cover angle and the power arrangement of the time-frequency resource block occupied by the cell, and combinations thereof,
The statement regarding the usage mode of the resource that the cell is currently using and / or intends to use includes a mode in which the cell monopolizes and a specific time and space in a specific time, space, and frequency. Including a statement on how to use resources in the form of sharing with neighboring cells in frequency,
The state information of the main cell includes a load instruction on a time-frequency resource block occupied by the main cell. A method for coordinating resources between cells. In claim 4,
When the statement regarding the usage mode of the resource that is being used by the cell and / or the cell is in an exclusive form, the resource coordination information is shaped by the cell and the angular width information of the beam shaped by the cell. And at least one of jump information in the space of the launch angle of the beam,
When the statement regarding the usage mode of the resource that is being used by the cell and / or the resource to be used is a shared format, the resource coordination information further includes a frequency hopping pattern or a frequency hopping pattern number in the specific spectrum resource of the cell. And a time pattern in which the cell occupies a specific spectrum resource or a time pattern number. In claim 1,
The operation of the radio node of the present cell to determine the resources that the radio node of the cell and the radio cells of the few adjacent cells intend to use within a specific time period from now on is as follows.
The radio node of the main cell arranges priorities of the main cell and the adjacent cell, and the radio node of the main cell determines whether the main cell and the adjacent cell are in accordance with the priority and a scheduled resource allocation rule. Allocate resources,
The radio node of the main cell arranges the potential of the main cell and the neighboring cell, and the radio node of the main cell arranges the main cell and the adjacent cell according to the potential arrangement and the scheduled resource allocation rule. A method for coordinating resources between cells, which includes any one of the following: In claim 6,
The scheduled resource allocation rule is:
When allocating resources to the main cell and the adjacent cell, a cell that can avoid a collision in any dimension of space, time, and frequency between a resource that is declared when used and a resource that is declared when used by another cell. The cell's radio node uses the declared resources within the specific time interval,
In allocating resources to the main cell and the adjacent cell, in the case of a cell in which a resource declared when used and a resource declared by another cell use collide in any dimension of space, time, and frequency, the main cell A cell having the highest priority or highest potential in a cell that collides with a resource statement occupies the stated resource and a cell having a lower priority gives up the declared resource. The coordination method of resources between. In claim 7,
For a cell that has abandoned the declared resource, the cell is in a radio frame according to the priority and the potential level of the cell that has abandoned the declared resource, in the resource dimension of time, frequency, and space angle, the scheduled time, A method for coordinating resources between cells, wherein a resource satisfying the statement of this cell is searched from idle resources based on a ranking composed of one or a plurality of combinations of frequency and angle. In any of claims 6 to 8,
The priority of the main cell and the neighboring cell is determined based on the load of the cell or the resource utilization rate, and the cell with the highest priority is the cell with the heaviest load or the highest utilization factor of the colliding resource block And
A method of coordinating resources between cells, wherein potentials of the main cell and the adjacent cell are determined based on a radio node of the main cell and a radio node number or geographical coordinates of the adjacent cell. In any of claims 6 to 8,
The method of coordinating resources between cells, further comprising the step of the radio node of the main cell locally forming a resource usage list of the main cell and the adjacent cell. In any of claims 1 to 8,
The radio node of the main cell further includes coordinating use of power resources at the frequency of the main cell based on a degree of interference sensitivity of the adjacent cell at a frequency used by the radio node of the main cell. A method for coordinating resources between cells. In any of claims 1 to 8,
The wireless node of the cell further includes the step of determining the usage of the resource within a specific time interval from the wireless node of itself and the number of neighboring cell wireless nodes.
The specific operation is
The radio node of the main cell statistics the resource usage form declared by itself and the radio nodes of the few neighboring cells, and the resource usage form with the highest number of statements is determined by the resource of the main cell and the adjacent cell. If there are two or more types of resource usages with the same number of statements, the resource usage mode of the cell with the highest priority or highest potential is used as the resource usage mode of the main cell and the adjacent cell. As
Alternatively, the resource utilization form declared by the cell having the highest priority or the highest potential is the resource utilization form of the main cell and the adjacent cell. A method for coordinating resources between cells. In any of claims 1 to 8,
When the radio node of the main cell is simultaneously adjacent to a plurality of adjacent radio nodes of a number of adjacent cells, the resource coordination information to be exchanged is the radio of the adjacent number of adjacent cells of the plurality of adjacent groups. A method for coordinating resources between cells, characterized in that it is the total resource state of nodes.

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