CN106550367B - dynamic interference coordination method based on load change and base station - Google Patents
dynamic interference coordination method based on load change and base station Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses dynamic interference coordination methods and a base station based on load change, wherein the method comprises the steps of confirming edge users and center users in each cell, dividing edge frequency bands available for the edge users in each cell into basic frequency bands and reserved frequency bands, obtaining edge load capacity of each cell according to the using amount of physical resource modules PRBs of the edge frequency bands of each cell, matching the edge load capacity of a target cell with a preset edge load capacity interval, and determining whether to allocate the PRBs of the reserved frequency bands of the target cell and/or the reserved frequency bands of adjacent cells according to the matching result.
Description
Technical Field
The invention relates to the technical field of communication, in particular to dynamic interference coordination methods based on load change and a base station.
Background
Since the invention of cellular mobile communication, series problems such as shortage of spectrum resources have been solved to a certain extent by .
With the rapid increase of the number of mobile terminals and data volume, the second generation and third generation mobile communication technologies have been unable to meet the increasing demand of transmission rate, so in the end of 2004, the 3GPP organization proposed the concept of LTE (Long Term Evolution). Compared with the current third-generation cellular system, the LTE has higher frequency spectrum efficiency and transmission rate, and simultaneously has peak rates of 100Mbps downlink and 50Mbps uplink, so that the system capacity is greatly improved while the network delay is obviously reduced. The LTE system adopts ofdma (orthogonal Frequency Division Multiple access) technology, which can suppress intra-cell interference well, but because the Frequency reuse factor of the LTE system is 1, the LTE faces the problem of inter-cell interference. How to solve the inter-cell interference becomes the key to determine the system performance level.
The three technologies can reduce the inter-cell interference to a certain extent at , wherein the interference coordination technology is considered as the most effective and most realizable technology and is also the current research focus, and the methods of ICIC (inter-cell interference coordination) are many, but the basic principle is to set limits on resource management to coordinate the actions of a plurality of cells so as to avoid generating serious inter-cell interference and simultaneously improve the throughput at the edge of the cell.
The method comprises the steps of allocating resources and power by using information (such as power information of users in a cell) in the cells, coordinating the resources and the power, and achieving the purpose of interference coordination.
The disadvantages of the prior art solutions are that the signaling overhead is not compatible with the flexibility of the frequency band allocation, and the utilization rate of the frequency spectrum resources is low, so that after the cell edge load exceeds limit, some edge users will not have available frequency resources.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides dynamic interference coordination methods and base stations based on load change, which can flexibly allocate frequency spectrum resources, fully utilize reserved frequency bands of adjacent cells and improve the utilization rate of the frequency spectrum resources.
Confirming edge users and center users in each cell, and dividing edge frequency bands available for the edge users in each cell into basic frequency bands and reserved frequency bands, wherein the basic frequency bands are used for users in the cell, and the reserved frequency bands are used for the users in the cell and/or are borrowed by the users in adjacent cells;
acquiring the edge load capacity of each cell according to the usage amount of physical resource modules PRBs of the edge frequency band of each cell;
when a preset scheduling period is reached, matching the edge load of a target cell with a preset edge load interval, and determining whether to allocate PRBs of reserved frequency bands of a reserved frequency band and/or an adjacent cell for the target cell according to a matching result, wherein the edge load interval comprises the edge load of each interval and an allocation rule of the PRBs of the reserved frequency bands in each cell corresponding to the edge load of each interval.
Optionally, the determining edge users and center users in each cell includes:
acquiring a path loss of an th user in a target cell and a second path loss from a second user in a cell adjacent to the target cell to a th user;
and determining the position of the th user in the target cell according to the corresponding relation between the difference value of the th path loss and the second path loss and a preset path loss threshold value.
Optionally, the determining, according to a corresponding relationship between the difference between the -th path loss and the second path loss and a preset path loss threshold, the position of the -th user in the target cell includes:
and if the difference value between the th path loss and the second path loss is greater than the preset path loss threshold, the th user is located in the central area of the target cell, and if the difference value between the th path loss and the second path loss is less than the preset path loss threshold, the th user is located in the edge area of the target cell.
Optionally, the dividing the edge frequency band available to the edge user in each cell into a basic frequency band and a reserved frequency band includes:
the edge frequency bands of each cell are all equal in width, each edge frequency band of each cell comprises an th boundary and a second boundary, and in the counterclockwise direction, the th boundary of the target cell edge frequency band is coincident with the second boundary of the adjacent cell edge frequency band;
the basic frequency bands of each cell are equal, the reserved frequency bands of each cell are equal, and the proportion between the basic frequency bands and the reserved frequency bands of each cell is adjustable.
Optionally, the determining whether to allocate the reserved frequency band and/or PRBs of the reserved frequency band of the neighboring cell to the target cell according to the matching result includes:
the edge load amount interval comprises an th interval, a second interval and a third interval;
the range of the edge load amount of the th interval is (0, gamma)l]The range of the edge load amount of the second section is (gamma)l，γh]And the range of the edge load amount of the third section is (gamma)h，1]；
When the edge load of the target cell falls into a interval, not allocating PRBs of a reserved frequency band and/or a reserved frequency band of an adjacent cell to the target cell;
wherein, γhFor presetting a high load threshold, gammalIs a preset low load threshold.
Optionally, before determining whether to allocate PRBs of reserved frequency bands of the target cell and/or the neighboring cells, the method further includes:
and detecting the reserved frequency bands of other cells except the target cell by a spectrum detection method according to a preset detection rule to acquire available PRBs (primary target base stations) in the reserved frequency bands of other cells.
Optionally, the preset detection rule includes:
and detecting reserved frequency bands of other cells except the target cell according to a clockwise or anticlockwise sequence by taking the target cell as a starting point, and acquiring the PRBs of the cell with the reserved frequency bands when the reserved frequency bands are detected in the other cells.
Optionally, the obtaining the PRBs of the cell with the reserved frequency band when detecting that there is the reserved frequency band in the other cell includes:
detecting the distance between the boundary of the reserved frequency band and the basic frequency band in the target cell and the second boundary of the cell with the reserved frequency band along the counterclockwise direction to obtain an th distance;
detecting the distance from the boundary of the reserved frequency band and the basic frequency band in the target cell to the boundary of the reserved frequency band and the basic frequency band of the cell with the reserved frequency band along the clockwise direction to obtain a second distance;
comparing the th distance with the second distance, if the th distance is smaller than the second distance, detecting the reserved frequency band of the cell with the reserved frequency band along the counterclockwise direction from the second boundary of the cell, and if the th distance is larger than the second distance, detecting the reserved frequency band of the cell along the clockwise direction from the boundary of the reserved frequency band with the reserved frequency band and the basic frequency band.
Optionally, when the edge load amount of the target cell falls within the third interval, allocating the PRBs of the reserved frequency band of the neighboring cell to the target cell includes:
determining the number of PRBs in a reserved frequency band of an adjacent cell allocated to the target cell according to the edge load capacity of the target cell;
comparing the number of PRBs in the reserved frequency band of the adjacent cell allocated to the target cell with the number of PRBs of the cell with the reserved frequency band, if the number of PRBs of the cell with the reserved frequency band is larger than or equal to the number of PRBs allocated to the target cell, acquiring PRBSs with the same number of PRBs allocated to the target cell from the PRBs of the cell with the reserved frequency band, and if the number of PRBs of the cell with the reserved frequency band is smaller than the number of PRBs allocated to the target cell, continuously acquiring the PRBs of cells with the reserved frequency band.
The invention also provides kinds of base stations, which is characterized by comprising:
, a confirmation module for determining edge users and center users in each cell;
a frequency band dividing module, configured to divide an edge frequency band available to an edge user in each cell into a basic frequency band and a reserved frequency band, where the basic frequency band is used for users in the cell, and the reserved frequency band is used for users in the cell and/or is borrowed by users in an adjacent cell;
the acquisition module is used for acquiring the edge load capacity of each cell according to the usage amount of the PRBs (physical resource blocks) of the edge frequency band of each cell;
the matching module is used for matching the edge load of the target cell with the preset edge load interval when the preset scheduling period is reached;
and a second determining module, configured to determine whether to allocate the PRBs of the reserved frequency band and/or the reserved frequency bands of the neighboring cells to the target cell according to a matching result of the matching module, where the marginal load amount interval includes a marginal load amount of each interval and an allocation rule of the PRBs of the reserved frequency band in each cell corresponding to the marginal load amount of each interval.
According to the technical scheme, the dynamic interference coordination method based on load change meets the requirement that the frequency spectrum resources used by each cell can be dynamically changed according to load change by allocating the reserved frequency band and/or the reserved frequency band of the adjacent cell.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 is a flowchart illustrating a method for dynamic interference coordination based on load change according to an embodiment of the present invention;
fig. 2 illustrates a three-cell scenario diagram of a dynamic interference coordination method based on load change according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a resource pre-allocation scheme of a load change-based dynamic interference coordination method according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating detection priorities of a dynamic interference coordination method based on load change according to an embodiment of the present invention;
fig. 5 shows a schematic diagram of a base station provided by an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Fig. 1 is a flowchart illustrating a method for dynamic interference coordination based on load change according to an embodiment of the present invention, and referring to fig. 1, the method includes the following steps:
101. confirming edge users and center users in each cell, and dividing edge frequency bands available for the edge users in each cell into basic frequency bands and reserved frequency bands, wherein the basic frequency bands are used for users in the cell, and the reserved frequency bands are used for the users in the cell and/or are borrowed by the users in adjacent cells;
102. acquiring the edge load capacity of each cell according to the usage amount of physical resource modules PRBs of the edge frequency band of each cell;
103. when a preset scheduling period is reached, matching the edge load of a target cell with a preset edge load interval, and determining whether to allocate PRBs of reserved frequency bands of a reserved frequency band and/or an adjacent cell for the target cell according to a matching result, wherein the edge load interval comprises the edge load of each interval and an allocation rule of the PRBs of the reserved frequency bands in each cell corresponding to the edge load of each interval.
The invention provides a dynamic interference coordination method based on load change, which divides an edge frequency band available for an edge user into a basic frequency band and a reserved frequency band, and allocates the reserved frequency band of a target cell and/or the reserved frequency band of an adjacent cell according to the edge load capacity of the target cell so as to achieve the aim that the frequency spectrum resources used by each cell can be dynamically changed according to the load change.
Fig. 2 is a three-cell scene diagram of a dynamic interference coordination method based on load change according to an embodiment of the present invention, and referring to fig. 2, in order to divide all users in each cell into edge users and center users, the present invention obtains a th path loss pl of a th user in a target cell1And a second loss pl from a second user in a cell adjacent to the target cell to the th user2And according to the difference value of the th path loss and the second path loss, i.e. | delta pl | ═ pl |, p2-pl1And a predetermined path loss threshold plthThe th user's position in the target cell is determined according to the corresponding relation between the target cell and the user.
If the difference between the th path loss and the second path loss is greater than the predetermined path loss threshold, i.e., | Δ pl>plthIf the difference value between the path loss and the second path loss is smaller than the preset path loss threshold value, namely | delta pl |, existing in the target cell, the th user is located in the central area of the target cell<plthThen the th user is located in the edge area of the target cell.
It is understood that |. Δ pl | ═ plthThat is, the th user is located at the boundary between the edge area and the center area of the target cell, and the present invention is only exemplified by three cells and is not limited to only three cells.
Fig. 3 is a schematic diagram of a resource pre-allocation scheme of a dynamic interference coordination method based on load change according to an embodiment of the present invention, and referring to fig. 3, the present invention divides an edge band of each cell into a basic band and a reserved band, where the preferable division manner is:
the width of the edge frequency band of each cell is equal, the edge frequency band of each cell includes th boundary and second boundary, the th boundary of the target cell edge frequency band coincides with the second boundary of the adjacent cell edge frequency band in the counterclockwise direction (it is understood that the th boundary and the second boundary of the target cell can be adjusted, and the detection order described below can also be changed adaptively), the basic frequency band of each cell is equal, the reserved frequency band of each cell is equal, and the ratio between the basic frequency band and the reserved frequency band of each cell is adjustable.
Taking a three-Cell scenario as an example, the th Cell is Cell 1, the second Cell is Cell 2, and the third Cell is Cell 3, assuming that the total number of resource blocks is NPRBDividing the available edge frequency of each cell into two parts of basic frequency band and reserved frequency band, wherein the basic frequency band and the reserved frequency band in the th cell are respectively F1And F11The basic frequency band and the reserved frequency band in the second cell are respectively F2And F22The basic frequency band and the reserved frequency band in the third cell are respectively F3And F33Wherein F is1＝F2＝F3＝αNPRB，F11＝F22＝F33＝βNPRBα + β is 1 and α, β are tunable, it being understood that the blank space is the frequency band occupied by the center user.
The following describes a matching process between the edge load of the target cell and the preset edge load interval in the present invention in detail.
First, when a load update cycle arrives, initializing edge bands of all cells as a basic band and a reserved band, and simultaneously obtaining and counting an edge load amount of each cell according to a usage amount of physical resource modules PRBs of the edge band of each cell, for example, if 10% of PRBs are used in the edge band of cells, a corresponding edge load amount is 0.1, and if all PRBs are used, the edge load amount is 1.
Next, the edge load amount section is divided into th section, a second section and a third section, and the range of the edge load amount of the th section is (0, γ)l]The range of the edge load amount of the second section is (gamma)l，γh]And the range of the edge load amount of the third section is (gamma)h，1]。
When each scheduling period arrives, when the edge load of the target cell falls into the th interval, maintaining the use of the basic frequency band by the target cell, when the edge load of the target cell falls into the second interval, allocating a reserved frequency band for the target cell, when the edge load of the target cell falls into the third interval, allocating the PRBs of the reserved frequency band and/or the reserved frequency band of the adjacent cell for the target cell;
wherein, γhFor presetting a high load threshold, gammalIs a preset low load threshold.
Before determining whether to allocate the reserved frequency bands and/or PRBs of the reserved frequency bands of the neighboring cells to the target cell, the reserved frequency bands of other cells except the target cell need to be detected by a spectrum detection method (energy detection or cyclostationary feature detection or database query, non-guard point) according to a preset detection rule, so as to obtain available PRBs in the reserved frequency bands of other cells. The preset detection rule is as follows: and detecting reserved frequency bands of other cells except the target cell according to a clockwise or anticlockwise sequence by taking the target cell as a starting point, and acquiring the PRBs of the cell with the reserved frequency bands when the reserved frequency bands are detected in the other cells.
Before completing the action of acquiring the PRBs of the cell with the reserved frequency band, determining the number of PRBs in the reserved frequency band of the adjacent cell allocated to the target cell according to the edge load capacity of the target cell, comparing the number of the PRBs in the reserved frequency band of the adjacent cell allocated to the target cell required by the target cell with the number of the PRBs of the cell with the reserved frequency band, acquiring the PRBSs with the same number as the PRBs allocated to the target cell from the PRBs of the cell with the reserved frequency band if the number of the PRBs of the cell with the reserved frequency band is greater than or equal to the number of the PRBs allocated to the target cell, and continuously acquiring PRBs of the cell with the reserved frequency band if the number of the PRBs of the cell with the reserved frequency band is less than the number of the PRBs allocated to the target cell.
Fig. 4 is a schematic diagram of detection priorities of a dynamic interference coordination method based on load change according to an embodiment of the present invention, and referring to fig. 3 and fig. 4, in order to reduce the probability that different cells detect a collision of the same available frequency band at the same time, different cells need to sequentially detect reserved frequency bands of neighboring cells according to a preset priority order.
Detecting the distance between the boundary of the reserved frequency band and the basic frequency band in the target cell and the second boundary of the cell with the reserved frequency band along the counterclockwise direction to obtain an th distance;
detecting the distance from the boundary of the reserved frequency band and the basic frequency band in the target cell to the boundary of the reserved frequency band and the basic frequency band of the cell with the reserved frequency band along the clockwise direction to obtain a second distance;
comparing the th distance with the second distance, and detecting the reserved frequency band of the cell with the reserved frequency band according to the comparison result.
The following describes the detection process in detail by taking the scenario of three cells as an example:
the detection sequence of the step is a cell detection sequence, which is to take the th cell as a starting point, detect the reserved frequency band F22 of the second cell preferentially in a clockwise sequence, detect the reserved frequency band F33 of the third cell secondly, and analogize the detection sequences of other cells.
The detection sequence of the second step is a frequency band detection sequence: when the cell detects other cells i (i is e {1,2,3}, here, taking the second cell as an example), the reserved frequency band F is reserved22When available PRBs are in the cell, detecting a distance between the boundary of the reserved frequency band and the basic frequency band in the th cell and a second boundary of the second cell (namely, the right edge of the second cell in fig. 3) in a counterclockwise direction, recording the distance as a , detecting a distance between the boundary of the reserved frequency band and the basic frequency band in the th cell and a th boundary of the second cell (namely, the left edge of the second cell in fig. 3) in a clockwise direction, recording the distance as a second distance, comparing the detected th distance with the second distance, detecting the reserved frequency band of the cell in the counterclockwise direction from the second boundary of the reserved frequency band if the th distance is less than the second distance, and detecting the reserved frequency band of the cell in the clockwise direction from the boundary of the reserved frequency band and the basic frequency band if the th distance is greater than the second distance.
The invention detects the reserved frequency bands of the adjacent cells in sequence by presetting the priority sequence in the detection process, and detects the PRBs in the available reserved frequency bands by the unique frequency band detection sequence, thereby achieving the purpose of reducing the probability that different cells detect the same available frequency band at the same time.
Fig. 5 is a schematic diagram of a base station provided by an embodiment of the present invention, and referring to fig. 5, the present invention further provides base stations, including:
, a confirmation module 51 for determining edge users and center users in each cell;
a frequency band dividing module 52, configured to divide an edge frequency band available to an edge user in each cell into a basic frequency band and a reserved frequency band, where the basic frequency band is used by users in the cell, and the reserved frequency band is used by users in the cell and/or users in neighboring cells;
an obtaining module 53, configured to obtain an edge load amount of each cell according to a usage amount of physical resource modules PRBs of an edge frequency band of each cell;
a matching module 54, configured to match an edge load amount of the target cell with a preset edge load amount interval when the preset scheduling period arrives;
a second determining module 55, configured to determine, according to the matching result of the matching module, whether to allocate the reserved frequency band and/or the PRBs of the reserved frequency band of the adjacent cell to the target cell, where the marginal load amount interval includes a marginal load amount of each interval and an allocation rule of the PRBs of the reserved frequency band in each cell corresponding to the marginal load amount of each interval.
The base station provided by the invention divides the available edge frequency band of the edge user into the basic frequency band and the reserved frequency band through the confirmation module 51, obtains the edge load of the target cell through the obtaining module 53, and distributes the reserved frequency band of the target cell and/or the reserved frequency band of the adjacent cell through the second determining module 55 according to the edge load of the target cell, so as to achieve the purpose that the frequency spectrum resource used by each cell can be dynamically changed according to the load change.
By adopting the base station provided by the invention, the base frequency bands can be used when the edge load of the cell is low; and can use its basic frequency band and reserved frequency band with the increase of the edge load capacity of the cell and greater than the threshold value of low load capacity; when the edge load of the cell is higher than the high load threshold, PRBs in reserved frequency bands of adjacent cells can be searched according to the preset priority sequence, and the utilization rate of the frequency spectrum can be improved.
The base station and the method provided by the invention have corresponding technical characteristics, and are not described herein again.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1, dynamic interference coordination method based on load change, comprising:
confirming edge users and center users in each cell, and dividing edge frequency bands available for the edge users in each cell into basic frequency bands and reserved frequency bands, wherein the basic frequency bands are used for users in the cell, and the reserved frequency bands are used for the users in the cell and/or are borrowed by the users in adjacent cells;
acquiring the edge load capacity of each cell according to the usage amount of physical resource modules PRBs of the edge frequency band of each cell;
when a preset scheduling period is reached, matching the edge load of a target cell with a preset edge load interval, and determining whether to allocate PRBs of reserved frequency bands of a reserved frequency band and/or an adjacent cell for the target cell according to a matching result, wherein the edge load interval comprises the edge load of each interval and an allocation rule of the PRBs of the reserved frequency bands in each cell corresponding to the edge load of each interval; the determining whether to allocate the PRBs of the reserved frequency band and/or the reserved frequency band of the neighboring cell to the target cell according to the matching result includes:
the edge load amount interval comprises an th interval, a second interval and a third interval;
the range of the edge load amount of the th interval is (0, gamma)l]The range of the edge load amount of the second section is (gamma)l，γh]And the range of the edge load amount of the third section is (gamma)h，1]；
When the edge load of the target cell falls into a interval, not allocating PRBs of a reserved frequency band and/or a reserved frequency band of an adjacent cell to the target cell;
wherein, γhFor presetting a high load threshold, gammalIs a preset low load threshold.
2. The method of claim 1, wherein the identifying the edge users and the center users in each cell comprises:
acquiring a path loss of an th user in a target cell and a second path loss from a second user in a cell adjacent to the target cell to a th user;
and determining the position of the th user in the target cell according to the corresponding relation between the difference value of the th path loss and the second path loss and a preset path loss threshold value.
3. The method of claim 2, wherein the determining the position of the user in the target cell according to the correspondence between the difference between the -th path loss and the second path loss and a preset path loss threshold comprises:
and if the difference value between the th path loss and the second path loss is greater than the preset path loss threshold, the th user is located in the central area of the target cell, and if the difference value between the th path loss and the second path loss is less than the preset path loss threshold, the th user is located in the edge area of the target cell.
4. The method of claim 1, wherein the dividing the edge frequency band available to the edge users in each cell into a basic frequency band and a reserved frequency band comprises:
the edge frequency bands of each cell are all equal in width, each edge frequency band of each cell comprises an th boundary and a second boundary, and in the counterclockwise direction, the th boundary of the target cell edge frequency band is coincident with the second boundary of the adjacent cell edge frequency band;
the basic frequency bands of each cell are equal, the reserved frequency bands of each cell are equal, and the proportion between the basic frequency bands and the reserved frequency bands of each cell is adjustable.
5. The method of claim 1, wherein before determining whether to allocate PRBs of reserved frequency bands of the target cell and/or reserved frequency bands of neighboring cells, the method further comprises:
and detecting the reserved frequency bands of other cells except the target cell by a spectrum detection method according to a preset detection rule to acquire available PRBs (primary target base stations) in the reserved frequency bands of other cells.
6. The method of claim 5, wherein the preset detection rule comprises:
and detecting reserved frequency bands of other cells except the target cell according to a clockwise or anticlockwise sequence by taking the target cell as a starting point, and acquiring the PRBs of the cell with the reserved frequency bands when the reserved frequency bands are detected in the other cells.
7. The method of claim 6, wherein the obtaining the PRBs of the cell with the reserved frequency band when detecting that there is a reserved frequency band in other cells comprises:
detecting the distance between the boundary of the reserved frequency band and the basic frequency band in the target cell and the second boundary of the cell with the reserved frequency band along the counterclockwise direction to obtain an th distance;
detecting the distance from the boundary of the reserved frequency band and the basic frequency band in the target cell to the boundary of the reserved frequency band and the basic frequency band of the cell with the reserved frequency band along the clockwise direction to obtain a second distance;
comparing the th distance with the second distance, if the th distance is smaller than the second distance, detecting the reserved frequency band of the cell with the reserved frequency band along the counterclockwise direction from the second boundary of the cell, and if the th distance is larger than the second distance, detecting the reserved frequency band of the cell with the reserved frequency band along the clockwise direction from the boundary of the reserved frequency band and the basic frequency band of the cell.
8. The method as claimed in claim 6, wherein the allocating PRBs of reserved frequency bands of neighboring cells for the target cell when the marginal load amount of the target cell falls within a third interval comprises:
determining the number of PRBs in a reserved frequency band of an adjacent cell allocated to the target cell according to the edge load capacity of the target cell;
comparing the number of PRBs in a reserved frequency band of an adjacent cell allocated to the target cell with the number of available PRBs of the cell with the reserved frequency band, if the number of PRBs of the cell with the reserved frequency band is larger than or equal to the number of PRBs allocated to the target cell, acquiring PRBSs with the same number as the PRBs allocated to the target cell from the PRBs of the cell with the reserved frequency band, and if the number of PRBs of the cell with the reserved frequency band is smaller than the number of PRBs allocated to the target cell, continuously acquiring the PRBs of the next cells with the reserved frequency band.
9, A base station, comprising:
, a confirmation module for determining edge users and center users in each cell;
a frequency band dividing module, configured to divide an edge frequency band available to an edge user in each cell into a basic frequency band and a reserved frequency band, where the basic frequency band is used for users in the cell, and the reserved frequency band is used for users in the cell and/or is borrowed by users in an adjacent cell;
the acquisition module is used for acquiring the edge load capacity of each cell according to the usage amount of the PRBs (physical resource blocks) of the edge frequency band of each cell;
the matching module is used for matching the edge load of the target cell with the preset edge load interval when the preset scheduling period is reached;
a second determining module, configured to determine whether to allocate, to the target cell, reserved frequency bands and/or PRBs of reserved frequency bands of adjacent cells according to a matching result of the matching module, where the marginal load amount interval includes marginal load amounts of the respective intervals and allocation rules of the PRBs of the reserved frequency bands in each cell corresponding to the marginal load amounts of the respective intervals;
the determining whether to allocate the PRBs of the reserved frequency band and/or the reserved frequency band of the neighboring cell to the target cell according to the matching result includes:
the edge load amount interval comprises an th interval, a second interval and a third interval;
the range of the edge load amount of the th interval is (0, gamma)l]The range of the edge load amount of the second section is (gamma)l，γh]And the range of the edge load amount of the third section is (gamma)h，1]；
When the edge load of the target cell falls into a interval, not allocating PRBs of a reserved frequency band and/or a reserved frequency band of an adjacent cell to the target cell;
wherein, γhFor presetting a high load threshold, gammalIs a preset low load threshold.
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