CN102726085A - Method, processor and base station for frequency band resource allocation - Google Patents

Abstract

A method, processor and base station for frequency band resource allocation are provided by the present invention. The method includes: allocating a corresponding initial edge frequency band for each of multiple cells, wherein corresponding initial edge frequency bands of the adjacent cells in the multiple cells are non-overlapped; if the edge frequency band required by one cell in the multiple cells exceeds its corresponding initial edge frequency band, then obtaining occupancy situation of resource block (RB) resource of initial edge frequency bands of adjacent cells of the cell, and occupying idle RB resource of initial edge frequency bands of the adjacent cells based on the occupancy situation of RB resource of initial edge frequency bands of the adjacent cells and the edge frequency band required by the cell; and allocating the RB resource of the edge frequency band of the cell obtained by occupying the idle RB resource to edge users of the cell. The embodiments of the present invention can realize adaptive allocation of edge frequency bands and improve system performance.

Description

Frequency band resource allocation method, processor and base station

technical field

The invention relates to mobile communication technology, in particular to a method for allocating frequency band resources, a processor and a base station.

Background technique

The Long Term Evolution (LTE) system adopts Orthogonal Frequency Division Multiplexing (OFDM) technology, and the information of users in the cell is carried on different carriers that are orthogonal to each other, basically eliminating the interference in the cell. However, in some deployment scenarios, each cell can use the entire system frequency band, and there is inter-cell interference caused by frequency reuse, especially for users in the cell edge frequency band, which causes the signal-to-interference-noise ratio of these users Reduced throughput performance. Therefore, inter-cell interference needs to be compensated to reduce the impact on user performance at the cell edge.

Currently commonly used interference compensation technology usually allocates different fringe frequency bands corresponding to adjacent mode cells. When scheduling fringe users, priority is given to scheduling in fringe frequency bands, so that fringe users in adjacent cells are scheduled on different frequency bands, thereby reducing It reduces the interference to edge users and improves its performance.

Patent application CN102006598A discloses a base station, a communication system and a communication method. The base station is used in a communication system that classifies user terminals into cell center terminals and cell edge terminals based on reception quality. The base station includes: a receiving unit that receives Cell edge frequency band information sent by a base station, the cell edge frequency band information indicating cell edge frequency bands allocated to cell edge terminals in nearby cells; a determining unit based on the cell edge frequency bands of a plurality of nearby cells received by the receiving unit information for determining a cell edge frequency band of a cell of the base station; and a communication unit for communicating with the cell edge terminal in the cell of the base station via the cell edge frequency band determined by the determination unit.

Patent application US20090201867A1 discloses a method for allocating bandwidth in a communication system.

Patent application CN102036250A discloses a dynamic allocation method of uplink frequency band resources, including: pre-dividing the uplink frequency band into several non-overlapping scheduling frequency bands, using one of the scheduling frequency bands as the edge user scheduling band of the local cell, and scheduling A scheduling reference resource block is configured for a frequency band, and each scheduling frequency band is dynamically adjusted with the scheduling reference resource block as a reference.

Contents of the invention

Embodiments of the present invention provide a frequency band resource allocation method, a processor, and a base station, so as to realize self-adaptive allocation of cell edge frequency bands and improve system performance.

On the one hand, an embodiment of the present invention provides a method for allocating frequency band resources, including:

Allocating corresponding initial fringe frequency bands to multiple cells, where the initial fringe frequency bands corresponding to adjacent cells in the multiple cells do not overlap with each other;

If the edge frequency band required by one of the multiple cells exceeds the corresponding initial edge frequency band, obtain the resource block RB resource occupancy of the initial edge frequency band of the adjacent cell of the one cell, and according to the adjacent cell Occupancy of the RB resources of the initial edge frequency band of the cell and the edge frequency band required by the one cell, occupying the idle RB resources of the initial edge frequency band of the adjacent cell;

Allocating the RB resources of the edge frequency band of the one cell obtained after occupying the idle RB resources to the edge users of the one cell.

Another aspect of the embodiment of the present invention provides a processor, including:

The first allocation module is configured to allocate corresponding initial edge frequency bands to multiple cells, and the initial edge frequency bands corresponding to adjacent cells in the multiple cells do not overlap with each other;

An expansion module, configured to acquire the resource of the initial edge frequency band of a neighboring cell of the one cell if the edge frequency band required by one of the plurality of cells exceeds the corresponding initial edge frequency band allocated by the first allocation module Block RB resource occupancy, and according to the occupancy of RB resources in the initial edge frequency band of the adjacent cell and the edge frequency band required by the one cell, occupy the idle RB resource of the initial edge frequency band of the adjacent cell;

The second allocating module is configured to allocate the RB resources of the edge frequency band of the one cell obtained by the expansion module after occupying the idle RB resources to the edge users of the one cell.

Another aspect of the embodiment of the present invention provides a base station, including:

The above-mentioned processor, and at least one of the following modules: input and output ports, memory.

Another aspect of the embodiment of the present invention provides a frequency band resource allocation method, including:

Receive the RB resource of the edge frequency band of the allocated cell, wherein the RB resource of the edge frequency band of the allocated cell is obtained by the following method:

Multiple cells are assigned corresponding initial edge frequency bands, and the initial edge frequency bands corresponding to adjacent cells in the multiple cells do not overlap with each other;

If the edge frequency band required by one of the multiple cells exceeds the corresponding initial edge frequency band, the resource block RB resource occupancy of the initial edge frequency band of the adjacent cell of the cell is obtained, and according to the adjacent Occupancy of the RB resource of the initial edge frequency band of the zone and the edge frequency band required by the one cell, and the idle RB resources of the initial edge frequency band of the adjacent cell are occupied;

The RB resources of the edge frequency band of the cell obtained after occupying the idle RB resources are the RB resources of the allocated cell's edge frequency band.

Another aspect of the embodiments of the present invention provides a processor. The processor reads a program and executes the read program, so that the steps related to the network side in the above method are executed.

Another aspect of the embodiments of the present invention provides a network-side device, including the above-mentioned processor. The processor reads a program and runs the read program, so that the steps related to the network side in the above-mentioned method are executed.

Another aspect of the embodiments of the present invention provides a processor. The processor reads a program and executes the read program, so that the steps related to the user side in the above method are executed.

Another aspect of the embodiments of the present invention provides a user device, including the above-mentioned processor. The processor reads a program and runs the read program, so that the steps related to the user side in the above-mentioned method are executed.

Another aspect of the embodiments of the present invention provides a communication system, including the above-mentioned network side device and the above-mentioned user equipment.

It can be seen from the above technical solution that in the embodiment of the present invention, when the edge frequency band required by a cell exceeds the initial edge frequency band of the own cell, the idle RB resources of the initial edge frequency band of the adjacent cell are occupied, so that the edge frequency bands of each cell can be dynamically occupied by each other. Avoid resource waste or resource fragmentation caused by fixed edge frequency bands, and improve resource utilization.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the schematic flow chart of the method of the first embodiment of the present invention;

FIG. 2 is a schematic diagram of initial marginal frequency band allocation in an embodiment of the present invention;

FIG. 3 is a schematic flow diagram of mode 1 cell edge frequency band allocation in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a resource allocation structure corresponding to FIG. 3;

FIG. 5 is a schematic flow diagram of mode 2 cell edge frequency band allocation in an embodiment of the present invention;

FIG. 6 is a schematic diagram of a resource allocation structure corresponding to FIG. 5;

FIG. 7 is a schematic flow diagram of mode 3 cell edge frequency band allocation in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a resource allocation structure corresponding to FIG. 7;

FIG. 9 is a schematic flow chart of a method according to a second embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a processor according to a third embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In one embodiment of the present invention, the frequency band at the edge of the cell is fixed, and the number of resource blocks (Resource Block, RB) in the available edge frequency band of the cell is also fixed accordingly. When the edge frequency band load of a cell or neighboring cells changes, the number of available edge frequency band RBs cannot be adaptively adjusted, which will result in waste of frequency band resources and resource fragmentation. In addition, in the way of fixing the edge frequency band, when the load of the edge frequency band of the local cell is light, and the load of the edge frequency band of the adjacent cell increases, the RB utilization rate of the local cell will be low, and the edge users of the adjacent cell will be scheduled in the central frequency band. It may happen that edge users in neighboring cells use the same frequency resources as edge users in this cell, the effect of Inter-Cell Interference Coordination (ICIC) will be greatly reduced, and the performance of edge users will also deteriorate.

Fig. 1 is a schematic flow chart of the method of the first embodiment of the present invention, including:

Step 11: The base station allocates corresponding initial fringe frequency bands to multiple cells, and among the multiple cells, the initial fringe frequency bands corresponding to adjacent cells do not overlap each other.

Usually, one base station has three cells, and in order to reduce the interference between the cells, it is necessary to allocate different initial edge frequency bands to the three cells. FIG. 2 is a schematic diagram of allocation of initial fringe frequency bands in an embodiment of the present invention. Referring to FIG. 2 , three cells are taken as a group, and the initial fringe frequency bands of the cells in the group need not overlap each other as an example.

The above-mentioned cells may specifically include cells of different modes. For example, in FIG. 2, from top to bottom, the three cells are Mode 1 cells, Mode 2 cells and Mode 3 cells. In each mode cell, edge band and center band. Wherein, the RB at the lowest frequency end of each edge frequency band is the starting point of the edge frequency band; at least part of the frequency bands in the frequency bands other than the edge frequency band is the center frequency band. In addition, the initial edge frequency band corresponding to each model cell is usually 1/3 of the ICIC active frequency band, and the number of RBs occupied by the ICIC active frequency band is the number of RBs occupied by the cell system bandwidth minus the Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) occupies the maximum number of RBs.

Assuming that the RBs occupied by the ICIC active frequency band are RB1~RB18, and each mode cell occupies 1/3 of the ICIC active frequency band, the edge frequency band occupied by the mode 1 cell is RB1~RB6, and the occupied central frequency band is RB7~RB18; The edge frequency bands occupied by the cell are RB7-RB12, and the occupied center frequency bands are RB1-RB6 and RB13-RB18. The edge frequency bands occupied by the mode 3 cell are RB13-RB18, and the occupied center frequency bands are RB1-RB12. It can be seen from FIG. 2 that initial edge frequency bands corresponding to cells of different modes do not overlap each other.

Step 12: If the edge frequency band required by one of the multiple cells exceeds the corresponding initial edge frequency band, obtain the occupancy of RB resources of the initial edge frequency band of the adjacent cell of the cell, and Occupancy of the RB resources of the initial edge frequency band of the cell and the edge frequency band required by the one cell occupy idle RB resources of the initial edge frequency band of the adjacent cell.

For example, if the number of edge users in a mode 1 cell increases, the required fringe frequency band increases and may exceed the corresponding initial fringe frequency band. Expand in the direction of the initial edge frequency band of the cell, and occupy idle RB resources of the initial edge frequency band of the adjacent mode cell.

The details are as follows, assuming that the initial fringe frequency bands occupied by the mode 1 cell are RB1~RB6, the initial fringe frequency bands occupied by the mode 2 cell are RB7~RB12, and the initial fringe frequency bands occupied by the mode 3 cell are RB13~RB18, in which the filling part (RB1, RB7 , RB13) indicate the starting point of the edge band. In an actual application scenario, cells in mode 1 and mode 2 occupy RBs in the initial edge frequency band of each mode from the starting point of the edge frequency band. For example, if the edge frequency band required by a mode 1 cell needs to occupy 1 RB, then RB1 will be occupied; if the edge frequency band required by a mode 1 cell needs to occupy 3 RBs, then RB1-RB3 will be occupied; and so on, the mode 1 cell can The occupied edge frequency band ranges from RB1 to RB6. The situation of the mode 2 cell can be deduced by analogy. Mode 3 is to preferentially occupy the RBs in the high-frequency part of the initial edge frequency band. For example, the edge frequency band required by the mode 3 cell needs to occupy 1 RB, and then RB18 is occupied; the edge frequency band required by the mode 3 cell needs to occupy 3 RB, then RB16-RB18 are occupied; and so on, until the starting point of the edge frequency band, that is, the range of the edge frequency band that the mode 3 cell can occupy is RB13-RB18.

If the number of edge users in a mode 1 cell increases, the required edge frequency band needs to occupy 8 RBs, that is, more than the 6 RBs initially allocated, and it needs to expand to the direction of the module 2 cell or the mode 3 cell, occupying the corresponding RBs within the initial edge band. Taking the expansion to the mode 3 cell as an example, the expanded edge frequency band of the mode 1 cell includes its own initial RB1-RB6, and also includes RB13 and RB14. In this implementation scenario, RB15 at the lowest frequency end of the edge frequency band of the mode 3 cell becomes the starting point of the edge frequency band, which is equivalent to moving the starting point of the edge frequency band of the mode 3 cell to the high frequency end by two RBs as a whole.

Wherein, when acquiring the edge frequency band occupancy of neighboring cells, a High Interference Indication (HII) message can be used. For example, if the edge frequency band of the mode 3 cell is known to be idle by using the HII message, then it is expanded to the mode 3 cell direction.

In one embodiment of the present invention, the mode 1 cell preferentially occupies idle RBs whose frequency is far from the starting point of the edge frequency band of the mode 1 cell (idle RBs of the mode 3 cell). When these RBs that can be occupied at a longer distance are occupied and still need to occupy more RBs, start to occupy RBs whose frequency is relatively close to the starting point of the edge frequency band of the mode 1 cell (idle RBs of the mode 2 cell) . Such a way of scheduling resources has better inter-cell interference coordination effect.

Step 13: the base station allocates the RB resources of the edge frequency band of the one cell obtained after occupying the idle RB resources to the edge users of the one cell.

The user referred to in each embodiment of the present invention refers to a user equipment that can be used as a mobile device by a user in a communication system.

Wherein, as shown in FIG. 2 , when allocating frequency bands for each mode cell, it includes edge frequency bands and center frequency bands, wherein the edge frequency bands are allocated to edge users, and the center frequency band is allocated to center users. Edge users and central users can be determined according to the Serving Cell Pilot Signal Received Power (Reference Signal Received Power, RSRP) value and the neighboring cell RSRP value. For example, if the measured RSRP value of a mode 1 cell and the measured RSRP value of a mode 2 cell or mode 3 cell for a user served by a mode 1 cell is smaller than the set value, then the user is an edge user, otherwise it is a central user. user.

When a mode cell determines that the user served by itself is a central user or an edge user, the central frequency band RB resources can be allocated to the central user in sequence, and the edge frequency band RB resources can be allocated to the edge users in sequence. Taking the expansion of the mode 1 cell to the mode 3 cell as an example, the mode 1 cell allocates RB1-RB6, RB13, and RB14 occupied by the mode 1 cell to edge users served by the mode 1 cell in sequence.

In addition, the above mode 1 cells and mode 2 cells may be allocated according to the direction from low frequency to high frequency, and the mode 3 cells may be allocated according to the direction from high frequency to low frequency. For example, taking the allocation of the initial edge frequency bands of cells in each mode as an example, cells in mode 1 are allocated RB1 first and RB6 last, cells in mode 2 are allocated RB7 first and RB12 last, and cells in mode 3 are allocated RB18 first and RB13 last.

In this embodiment, when the edge frequency band required by a cell of a certain mode exceeds the initial edge frequency band of this cell, the RBs of the initial edge frequency band of the adjacent cell are occupied, so that the edge frequency bands of each cell can be dynamically occupied by each other, and the edge frequency band of the cell can be automatically occupied. Adapt to changes, avoid resource waste or resource fragmentation caused by fixed edge frequency bands, and improve cell edge user throughput and RB resource utilization. If the initial edge frequency band of this cell is sufficient, it will not actively occupy the edge frequency band resources of other cells. This method of dynamically occupying other cell frequency band resources based on the initially fixedly allocated edge frequency band range according to actual application conditions can reduce the design complexity of the scheduler.

In the following, the initial fringe frequency bands occupied by cells in mode 1 are RB1-RB6, the fringe frequency bands occupied by cells in mode 2 are RB7-RB12, and the fringe frequency bands occupied by cells in mode 3 are RB13-RB18 as examples to illustrate the dynamic allocation of fringe frequency bands.

FIG. 3 is a schematic flow chart of a mode 1 cell edge frequency band allocation method in an embodiment of the present invention, and FIG. 4 is a schematic diagram of a resource allocation structure corresponding to FIG. 3 .

In this embodiment, the idle RB resources are preferentially from the idle RBs that are far away from the starting point of the initial edge frequency band of the mode 1 cell. For example, the Mode 1 cell preferentially occupies idle RBs whose frequency is far from the starting point of the initial edge frequency band of the Mode 1 cell (idle RBs of the Mode 3 cell). When these far-distance RBs that can be occupied are occupied and still need to occupy more RBs, start to occupy RBs whose frequency is relatively close to the starting point of the initial edge frequency band of the mode 1 cell (idle RBs of the mode 2 cell ).

In this embodiment, the adjacent cell moves the starting point of the initial edge frequency band of the adjacent cell to the high frequency end according to the fact that the idle RB is occupied by the mode 1 cell. For example: when the idle RB occupied by the mode 1 cell comes from the mode cell at the high frequency end (mode cell 3 or mode cell 2), the starting point of the initial edge frequency band of the mode cell at the high frequency end (mode cell 3 or mode cell 2) needs to be High frequency end moves.

Referring to Fig. 3, the method of the present embodiment includes:

Step 31: sequentially allocate RB resources of the initial edge frequency band of the mode 1 cell to the edge users of the mode 1 cell.

For example, the RB resources of the initial edge frequency band of the mode 1 cell are allocated to edge users in the order of RB1-RB6.

Step 32: If the RB resource of the initial edge frequency band of the mode 1 cell is allocated, obtain the RB occupancy of the edge frequency band of the adjacent cell.

For example, if after RB1-RB6 are all allocated, there are still edge users in the mode 1 cell that have not allocated edge frequency band resources, then the edge frequency band of the mode 1 cell can be expanded according to the RB occupancy of the edge frequency bands of neighboring cells.

For example, the cells exchange HII messages through the X2 interface between eNBs, and the HII messages carry the RB occupancy status of the respective edge frequency bands of the cells. For example, a mode 3 cell informs a mode 1 cell that two RBs are free in the edge frequency band occupied by the mode 1 cell through an HII message. Since the mode 3 cell allocates resources from high frequency to low frequency, if two RBs are idle, the two idle RBs for RB13 and RB14. Of course, the number of idle RBs in adjacent cells can also be obtained through calculation. For example, a mode 3 cell informs that the occupied RB is x through HII message, then the mode 1 cell can obtain the number of idle RBs of the mode 3 cell by subtracting y-x, where y is the number of RBs in the initial edge frequency band of the mode 3 cell. The number of RBs occupied by the initial edge frequency bands of neighboring cells can be known during the initial configuration of each cell.

Step 33: If the initial edge frequency band of the mode 3 cell is free, occupy the idle RBs in the initial edge frequency band of the mode 3 cell to obtain the expanded edge frequency band of the mode 1 cell.

For example, the two idle RBs of a mode 3 cell are RB13 and RB14, and the edge frequency band required by a mode 1 cell is equal to or greater than 8 RBs, then the expanded edge frequency band of a mode 1 cell includes RB1~RB6, RB13, and RB14. Of course, the edge frequency band required by the mode 1 cell is greater than 6 RBs but less than 8 RBs. If the required edge frequency band is 7 RBs, only one of the idle RBs of the mode 3 cell can be occupied. For example, the priority expansion occupancy RB13.

Step 34: If after occupying the idle RBs in the initial edge frequency band of the mode 3 cell, the mode 1 cell still needs RB resources of the edge frequency band, occupy the RBs of the edge frequency band of the mode 2 cell.

For example, the number of idle RBs in the edge frequency band of the mode 2 cell is α, if the number of RBs in the edge frequency band still required by the mode 1 cell is δ, then the number of RBs in the edge frequency band of the mode 2 cell that needs to be preempted is λ=min(a, δ) . Send the HII message to the neighboring cell through the X2 port, and preempt the λ RB resources starting from the edge frequency band starting RB of the mode 2 cell, and move the λ RB resources from the edge frequency band starting RB of the mode 2 cell to the high frequency end accordingly, but the mode 2 The starting RB of the edge frequency band of the cell is moved to the highest end of the edge frequency band of the mode 2 cell at most.

Refer to Figure 4 for details. If the mode 1 cell occupies the 2 idle RBs of the mode 3 cell, it needs 2 more RBs. The first two RBs occupy RB7 and RB8. At this time, since RB7 and RB8 are occupied by the mode 1 cell, the edge frequency band of the mode 2 cell needs to be moved up, that is, the RB of the edge frequency band of the mode 2 cell needs to be allocated from RB9 For edge users of Mode 2 cells.

Of course, if the number of edge users in a mode 2 or mode 3 cell increases and more edge frequency band resources need to be occupied, the RBs occupied by the mode 1 cell will be preferentially occupied, and the mode 1 cell needs to back off the occupied edge frequency band resources at this time. For example, a mode 3 cell still needs to occupy one RB, and RB14 will continue to be occupied by the mode 3 cell instead of being occupied by the mode 1 cell.

The foregoing content in this embodiment is based on an example in which the mode 1 cell is preferentially expanded to the mode 3 cell. Of course, the mode 1 cell may also be preferentially expanded to the mode 2 cell. details as follows:

When the mode 1 cell needs to be expanded, if the mode 2 edge frequency band RBs are idle, assuming that the number of idle RBs in the mode 2 cell is d, if the number of edge frequency band RBs still required by the mode 1 cell is δ, it is necessary to preempt the mode 2 cell The number of RBs in the edge frequency band is λ=min(d, δ). Send the HII message to the neighboring cell through the X2 port to preempt the λ RB resources starting from the edge frequency band starting RB of the mode 2 cell, and move the λ RB resources from the edge frequency band starting RB of the mode 2 cell to the high frequency end, but the mode 2 cell The starting RB of the edge frequency band moves to the highest end of the edge frequency band of the mode 2 cell at most. If the requirement still cannot be met, expand to the idle RB resource of mode 3. If there are no free RBs, no expansion is performed. When the edge load of a mode 2 cell or a mode 3 cell increases, the required number of edge frequency band RBs is calculated, and the edge frequency band occupied by mode 1 is preferentially preempted, and the expanded edge frequency band of the mode 1 cell is correspondingly backed off.

FIG. 5 is a schematic flow diagram of a mode 2 cell edge frequency band allocation method in an embodiment of the present invention, and FIG. 6 is a schematic diagram of a resource allocation structure corresponding to FIG. 5 .

In this embodiment, the adjacent cell moves the starting point of the initial edge frequency band of the adjacent cell to the high frequency end according to the fact that the idle RB is occupied by the mode 2 cell. For example: when the idle RB occupied by the mode 2 cell comes from the mode cell 3 at the high frequency end, the starting point of the initial edge frequency band of the mode cell 3 at the high frequency end needs to be moved to the high frequency end accordingly.

Referring to Figure 5, the method of this embodiment includes:

Step 51: sequentially allocate RB resources of the initial edge frequency band of the mode 2 cell to the edge users of the mode 2 cell.

For example, referring to FIG. 2 , initial edge frequency bands are allocated to edge users in the order of RB7-RB12.

Step 52: If the RB resources of the initial edge frequency band of the mode 2 cell are allocated, obtain the RB occupancy of the edge frequency band of the adjacent cell.

For example, if after RB7-RB12 are all allocated, there are still edge users in the mode 2 cell that do not allocate RB resources of the edge frequency band, then the edge frequency band of the mode 2 cell can be expanded according to the RB occupancy of the edge frequency bands of neighboring cells.

For example, the cells exchange HII messages through the X2 interface, and the HII messages carry the RB occupancy status of their respective edge frequency bands. For example, the mode 1 cell informs the mode 2 cell that two RBs are free in the edge frequency band occupied by it through the HII message. Since the mode 1 cell allocates resources from low frequency to high frequency, if two RBs are free, the two idle RBs for RB5 and RB6.

Step 53: If the RB resources of the initial edge frequency band of the mode 1 cell are free, occupy the idle RB resources in the initial edge frequency band of the mode 1 cell to obtain the expanded edge frequency band of the mode 2 cell.

For example, the two idle RBs of a mode 1 cell are RB5 and RB6, and the edge frequency band required by a mode 2 cell is equal to or greater than 8 RBs, then the expanded edge frequency band of a mode 2 cell includes RB7-RB12, RB5, and RB6. Of course, the edge frequency band required by the mode 2 cell is greater than 6 RBs but less than 8 RBs. If the required edge frequency band is 7 RBs, only one of the idle RBs of the mode 1 cell can be occupied. For example, the priority expansion occupancy RB6.

Step 54: If after occupying the idle RB resources in the initial edge frequency band of the mode 1 cell, the mode 2 cell still needs RB resources in the edge frequency band, then occupy the RB resources in the edge frequency band of the mode 3 cell.

For example, the number of idle RBs in the edge frequency band of the mode 3 cell is , if the number of RBs in the edge frequency band still required by the mode 2 cell is δ, then the number of RBs in the edge frequency band of the mode 3 cell that needs to be preempted is λ=min(b, δ ). Send HII messages to neighboring cells through the X2 port to preempt the λ RB resources starting from the edge frequency band starting RB of the mode 3 cell, and move the λ RB resources from the edge frequency band starting RB of the mode 3 cell to the high frequency end, but the mode 3 cell The starting RB of the edge frequency band is moved to the highest end of the edge frequency band of the Mode 3 cell at most.

Specifically, if the mode 2 cell occupies the 2 idle RBs of the mode 1 cell, 2 more RBs are needed. If the number of idle RBs in the mode 3 cell is equal to or greater than 2 RBs, then occupy the 2 RBs starting from the low frequency in the mode 3 cell, that is, occupy RB13 and RB14. At this time, since RB13 and RB14 are occupied by the mode 2 cell, the initial edge frequency band of the mode 3 cell needs to be moved up, that is, the edge frequency band of the mode 3 cell is allocated to RB15 at most.

Of course, if the number of edge users in a mode 1 or mode 3 cell increases and more edge frequency band resources need to be occupied, the RBs occupied by the mode 2 cell will be preferentially occupied, and the mode 2 cell needs to back off the occupied edge frequency band resources at this time. For example, if a mode 1 cell still needs to occupy one RB, RB5 will continue to be occupied by the mode 1 cell instead of being occupied by the mode 2 cell.

The foregoing content in this embodiment is based on the example that the mode 2 cell is preferentially expanded toward the mode 1 cell. Of course, the mode 2 cell may also be preferentially expanded toward the mode 3 cell. details as follows:

When the mode 2 cell edge frequency band load increases, the RB resources allocated to the edge users are allocated from the low frequency end to the high frequency end. After the initial edge frequency band of the cell is fully occupied and still cannot meet the demand, the RB occupancy of the edge frequency band of the mode 3 cell is obtained through the HII message. If there are idle RBs in the edge frequency band of the mode 3 cell, the number e of idle RBs in the edge frequency band of the mode 3 cell is calculated. If the number of edge frequency band RBs still required by the cell in mode 1 is δ at this time, the number of edge frequency band RBs that need to be preempted by the cell in mode 2 is λ=min(e, δ). Send the HII message to the neighboring cell through the X2 interface, and preempt the λ RBs from the edge frequency band starting RB of the cell in mode 3. The starting RB of the edge frequency band of the mode 3 cell is moved up by λ RBs, but the starting RB of the edge frequency band of the mode 3 cell is moved to the highest end of the edge frequency band of the mode 3 cell at most. If the requirements cannot be met, the idle edge frequency band of mode 1 is expanded in reverse to the low frequency end. If there is no idle RB in mode 1, no expansion is performed. When the cell edge load in mode 1 or mode 3 increases, calculate the required number of edge frequency band RBs, preempt the edge frequency band occupied by mode 2 first, and back off the expanded edge frequency band of the mode 2 cell accordingly.

FIG. 7 is a schematic flowchart of mode 3 cell edge frequency band allocation in an embodiment of the present invention. FIG. 8 is a schematic diagram of resource allocation structure corresponding to FIG.

In this embodiment, the idle RB resources are preferentially from the idle RBs that are closer to the starting point of the initial edge frequency band of the Mode 3 cell. For example, the Mode 3 cell preferentially occupies an idle RB whose frequency is closer to the starting point of the initial edge frequency band of the Mode 3 cell (the idle RB of the Mode 2 cell). When these RBs that can be occupied at a closer distance are occupied and still need to occupy more RBs, start to occupy RBs whose frequencies are relatively far from the starting point of the initial edge frequency band of the mode 3 cell (idle RBs of the mode 1 cell ).

Referring to Figure 7, the method of this embodiment includes:

Step 71: sequentially allocate RB resources of the initial edge frequency band of the mode 3 cell to the edge users of the mode 3 cell.

For example, with reference to FIG. 2 , initial edge frequency bands are allocated to edge users in the order of RB18-RB13.

Step 72: If the RB resources of the initial edge frequency band of the mode 3 cell are allocated, obtain the RB occupancy of the edge frequency band of the adjacent cell.

For example, if after RB18-RB13 are all allocated, there are still edge users in the mode 3 cell that have not allocated edge frequency band RB resources, then the edge frequency band of the mode 3 cell can be expanded according to the occupancy of the edge frequency bands of neighboring cells.

For example, the cells exchange HII messages through the X2 interface, and the HII messages carry the RB occupancy status of their respective edge frequency bands. For example, the mode 2 cell notifies the mode 3 cell that the edge frequency band occupied by it still has two idle RBs through the HII message. Since mode 2 cells allocate resources from low frequency to high frequency, if two RBs are idle, the two idle RBs are RB11 and RB12.

Step 73: If the initial edge frequency band of the mode 2 cell is free, occupy the idle RB resource of the initial edge frequency band of the mode 2 cell, and obtain the expanded edge frequency band of the mode 3 cell.

For example, the two idle RBs of a mode 2 cell are RB11 and RB12, and the edge frequency band required by a mode 3 cell is equal to or greater than 8 RBs, then the expanded edge frequency band of a mode 3 cell includes RB13-RB18, RB11, and RB12. Of course, the edge frequency band required by the mode 3 cell is greater than 6 RBs but less than 8 RBs. If the required edge frequency band is 7 RBs, only one of the idle RBs of the mode 2 cell can be occupied. For example, the priority expansion occupancy RB12.

Step 74: If the idle RBs of the initial edge frequency band of the mode 2 cell are occupied, and the mode 3 cell still needs an edge frequency band, occupy the idle RBs of the initial edge frequency band of the mode 1 cell.

For example, the number of idle RBs in the edge frequency band of the cell in mode 1 is . If the number of RBs in the edge frequency band still required by the cell in mode 3 is δ, the number of RBs in the edge frequency band of the cell in mode 1 that needs to be preempted is λ=min(c, δ ). Send an HII message to the neighboring cell through the X2 port to preempt λ RB resources at the high frequency end of the mode 1 cell.

The details are as follows, if the mode 3 cell occupies the 2 idle RBs of the mode 2 cell, it needs 2 more RBs; RB, that is, occupying RB5 and RB6.

Of course, if the number of edge users in a mode 1 or mode 2 cell increases and more edge frequency band resources need to be occupied, the RBs occupied by the mode 3 cell will be preferentially occupied, and the mode 3 cell needs to back off the occupied edge frequency band resources at this time. For example, if the mode 2 cell still needs to occupy one RB, then RB11 will continue to be occupied by the mode 2 cell instead of being occupied by the mode 3 cell.

Through the above-mentioned different allocation manners, the diversification of the allocation manners of the edge frequency bands can be realized.

In the initial stage of LTE commercial use, the load is light, and the central user allocation strategy is to allocate away from the edge frequency band. For example, in mode 1 cells and mode 3 cells, the load of edge users is light. Mode 1 central users are allocated from the high frequency end, while mode 3 cells If the center users are allocated from the low frequency band, the center frequency band of the cell will overlap with the edge frequency bands of the neighboring cells, resulting in a serious loss of throughput for the center users. In order to reduce interference, the following embodiments may be adopted.

Fig. 9 is a schematic flow chart of a method according to a second embodiment of the present invention, including:

Step 91: The cell acquires the occupancy of the edge frequency band RBs of the neighboring cells.

For example, the mode 1 cell learns through the HII message that the edge frequency bands occupied by the mode 2 cell are RB7 and RB8, and the edge frequency bands occupied by the mode 3 cell are RB16-RB18.

Step 92: The cell schedules central users on the RBs of the central frequency band that are not occupied by neighboring cells as edge frequency band RBs in its own central frequency band RB resources.

Referring to Figure 2, the central frequency band of the mode 1 cell itself is RB7~RB18, assuming that the RBs occupied by the neighboring cell as the edge frequency band RB are RB7, RB8, RB16~RB18, then the mode 1 cell will be in (RB7~RB18)-(RB7+ RB8+RB16-RB18), that is, users of the dispatching center on RB9-RB15.

In this embodiment, by obtaining the frequency band occupancy at the edge of the adjacent cell, combined with its own central frequency band, the frequency band resource can be more reasonably and fully utilized, and the performance index of the network can be improved.

FIG. 10 is a schematic structural diagram of a processor according to a third embodiment of the present invention. The processor may specifically be a processor in a network-side device that executes the steps involving the network-side device in the above method. The processor includes a first allocation module 101 , an expansion module 102 and a second allocation module 103; the first allocation module 101 is used to allocate corresponding initial edge frequency bands for multiple cells, and the initial edge frequency bands corresponding to adjacent cells in the multiple cells do not overlap each other; the expansion module 102: If the edge frequency band required by one of the plurality of cells exceeds the corresponding initial edge frequency band allocated by the first allocation module, acquire the resource block RB of the initial edge frequency band of a neighboring cell of the one cell Occupancy of resources, and according to the occupancy of RB resources of the initial edge frequency band of the adjacent cell and the edge frequency band required by the one cell, occupy the idle RB resource of the initial edge frequency band of the adjacent cell; the second allocation module 103 is configured to allocate the RB resources of the edge frequency band of the one cell obtained by the expansion module after occupying the idle RB resources to the edge users of the one cell.

It may be that the expansion module 102 is specifically configured to: obtain the RB resource occupancy of the initial edge frequency band of the neighboring cell through a high interference indication HII message.

Further, the idle RB resources occupied by the expansion module 102 are preferentially from idle RBs far from the starting point of the initial edge frequency band of the one cell.

Alternatively, the idle RB resources occupied by the expansion module 102 are preferentially from idle RBs that are closer to the starting point of the initial edge frequency band of the one cell.

Specifically, when the adjacent cell needs to allocate the occupied idle RB resources, the one cell processed by the expansion module 102 returns the occupied idle RB resources.

The processor may also include: a scheduling module, configured to allocate a corresponding central frequency band for the one cell; according to the occupancy of resource block RB resources in the initial edge frequency band of the neighboring cell of the one cell, in the central frequency band In the RB resource, the central user is scheduled on the RB not occupied by the neighboring cell as the edge frequency band RB.

In this embodiment, when the edge frequency band required by a cell of a certain mode exceeds the initial edge frequency band of this cell, the RBs of the initial edge frequency band of the adjacent cell are occupied, so that the edge frequency bands of each cell can be dynamically occupied by each other, and the edge frequency band of the cell can be automatically occupied. Adapt to changes, avoid resource waste or resource fragmentation caused by fixed edge frequency bands, and improve cell edge user throughput and RB resource utilization. If the initial edge frequency band of this cell is sufficient, it will not actively occupy the edge frequency band resources of other cells. This method of dynamically occupying other cell frequency band resources based on the initially fixedly allocated edge frequency band range according to actual application conditions can reduce the design complexity of the scheduler.

FIG. 11 is a schematic structural diagram of a base station according to the fourth embodiment of the present invention, including a base station side processor 111 and a base station general module 112, wherein the base station side processor 111 may be as shown in FIG. 10 , and the base station general module 112 includes but not Restricted to the following blocks: I/O ports, memory.

In this embodiment, when the edge frequency band required by a cell of a certain mode exceeds the initial edge frequency band of this cell, the RBs of the initial edge frequency band of the adjacent cell are occupied, so that the edge frequency bands of each cell can be dynamically occupied by each other, and the edge frequency band of the cell can be automatically occupied. Adapt to changes, avoid resource waste or resource fragmentation caused by fixed edge frequency bands, and improve cell edge user throughput and RB resource utilization. If the initial edge frequency band of this cell is sufficient, it will not actively occupy the edge frequency band resources of other cells. This method of dynamically occupying other cell frequency band resources based on the initially fixedly allocated edge frequency band range according to actual application conditions can reduce the design complexity of the scheduler.

An embodiment of the present invention provides a processor. The processor reads a program and executes the read program, so that the steps related to the network side device in the method in the foregoing embodiments are executed.

An embodiment of the present invention also provides a network-side device, including a processor. The processor reads a program and executes the read program, so that the steps related to the network-side device in the method in the foregoing embodiments are executed.

An embodiment of the present invention provides a processor. The processor reads a program and executes the read program, so that the steps related to the network side device in the method in the foregoing embodiments are executed.

An embodiment of the present invention also provides a network side device, including a processor, a storage module, an input and output port, and a power amplifier and other general components of the network side device, the processor reads the program and runs the read program, The steps related to the network side device in the methods in the foregoing embodiments are executed.

An embodiment of the present invention provides a processor. The processor reads a program and executes the read program, so that the steps related to the user equipment in the method in the foregoing embodiments are executed.

An embodiment of the present invention also provides a user device, including a processor, a storage module, an input and output port, and a power amplifier and other general components of the user device. The processor reads the program and runs the read program, so that the aforementioned The steps involving the user equipment in the methods of the embodiments are performed.

An embodiment of the present invention also provides a communication system, including the network side device and user equipment in the foregoing embodiments.

It can be understood that related features in the above methods and devices can refer to each other. In addition, "first", "second" and so on in the above embodiments are used to distinguish each embodiment, and do not represent the advantages and disadvantages of each embodiment.

Those of ordinary skill in the art can understand that all or part of the steps to realize the above method embodiments can be completed by hardware related to program instructions, and the aforementioned programs can be stored in computer-readable storage media. When the program is executed, the execution includes The steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (20)

1. a method for distributing frequency band sources is characterized in that, comprising:

Be the corresponding initial edge frequency bands of a plurality of cell allocation, the initial edge frequency band non-overlapping copies of adjacent sub-district correspondence in said a plurality of sub-districts;

If the required edge band in a sub-district in said a plurality of sub-district surpasses corresponding initial edge frequency band; Then obtain the situation that takies of Resource Block RB resource of initial edge frequency band of the adjacent area of a said sub-district; And, take the idle RB resource of the initial edge frequency band of said adjacent area according to the situation that takies and the said edge band that the sub-district is required of the RB resource of the initial edge frequency band of said adjacent area;

With the RB resource of the edge band that takies a said sub-district that obtains after the said idle RB resource, distribute to the edge customer of a said sub-district.

2. method according to claim 1 is characterized in that, obtains the RB occupation condition of the initial edge frequency band of said adjacent area through high interference indication HII message.

3. method according to claim 1 and 2 is characterized in that, said idle RB resource preferentially comes from the starting point idle RB far away of the initial edge frequency band of the said sub-district of distance.

4. according to each described method of claim 1-3, it is characterized in that said adjacent area by a said situation that the sub-district takies, is moved the starting point of the initial edge frequency band of said adjacent area according to idle RB to front end.

5. method according to claim 1 and 2 is characterized in that, said idle RB resource preferentially comes from the nearer idle RB of starting point of the initial edge frequency band of the said sub-district of distance.

6. according to each described method of claim 1-5, it is characterized in that when occupied idle RB resource need be distributed in said adjacent area, said occupied idle RB resource was return in a said sub-district.

7. according to each described method of claim 1-6, it is characterized in that, also comprise:

Be the corresponding center frequency-band of a said cell allocation;

The situation that takies according to the Resource Block RB resource of the initial edge frequency band of the adjacent area of a said sub-district is not taken on the RB as edge band RB the user of control centre by said adjacent area in the RB of said center frequency-band resource.

8. a processor is characterized in that, comprising:

First distribution module is used to the corresponding initial edge frequency band of a plurality of cell allocation, the initial edge frequency band non-overlapping copies of adjacent sub-district correspondence in said a plurality of sub-districts;

The expansion module; If be used for the initial edge frequency band that the required edge band in a sub-district of said a plurality of sub-districts surpasses corresponding said first module assigns; Then obtain the situation that takies of Resource Block RB resource of initial edge frequency band of the adjacent area of a said sub-district; And, take the idle RB resource of the initial edge frequency band of said adjacent area according to the situation that takies and the said edge band that the sub-district is required of the RB resource of the initial edge frequency band of said adjacent area;

Second distribution module is used for the RB resource with the edge band that takies the said sub-district that said expansion module obtains after the said idle RB resource, distributes to the edge customer of a said sub-district.

9. processor according to claim 8 is characterized in that, said expansion module specifically is used for: the RB occupation condition of obtaining the initial edge frequency band of said adjacent area through high interference indication HII message.

10. according to Claim 8 or 9 described processors, it is characterized in that the said idle RB resource that said expansion module takies preferentially comes from the starting point idle RB far away of the initial edge frequency band of the said sub-district of distance.

11. according to Claim 8 or 9 described processors, it is characterized in that the said idle RB resource that said expansion module takies preferentially comes from the nearer idle RB of starting point of the initial edge frequency band of the said sub-district of distance.

12. each described processor is characterized in that according to Claim 8-11, when occupied idle RB resource need be distributed in said adjacent area, said occupied idle RB resource was return in a said sub-district of said expansion resume module.

13. each described processor is characterized in that according to Claim 8-12, also comprises:

Scheduler module is used to the corresponding center frequency-band of a said cell allocation; The situation that takies according to the Resource Block RB resource of the initial edge frequency band of the adjacent area of a said sub-district is not taken on the RB as edge band RB the user of control centre by said adjacent area in the RB of said center frequency-band resource.

14. a base station is characterized in that, comprising:

Like each described processor of claim 8-13, and,

At least a as in the lower module: input/output port, memory.

15. a method for distributing frequency band sources is characterized in that, comprising:

The RB resource of the edge band of the sub-district that reception is assigned with, wherein, the RB resource of the edge band of the sub-district that is assigned with obtains in the following manner:

A plurality of sub-districts are assigned with corresponding initial edge frequency band, the initial edge frequency band non-overlapping copies of adjacent sub-district correspondence in said a plurality of sub-districts;

If the required edge band in a sub-district in said a plurality of sub-district surpasses corresponding initial edge frequency band; The situation that takies of the Resource Block RB resource of the initial edge frequency band of the adjacent area of a then said sub-district is obtained; And according to the situation that takies and the said edge band that the sub-district is required of the RB resource of the initial edge frequency band of said adjacent area, the idle RB resource of the initial edge frequency band of said adjacent area is occupied;

The RB resource that takies the edge band of a said sub-district that obtains after the said idle RB resource is the RB resource of the edge band of the said sub-district that is assigned with.

16. a processor, the program that said processor reads through fetch program and operation makes to be able to carry out like the step in each described method of claim 1-7.

17. a network equipment comprises processor as claimed in claim 16, the program that this processor reads through fetch program and operation makes to be able to carry out like the step in each described method of claim 1-7.

18. a processor, the program that said processor reads through fetch program and operation makes that the step in the method as claimed in claim 15 is able to carry out.

19. a subscriber equipment comprises processor as claimed in claim 18, the program that this processor reads through fetch program and operation makes that the step in the method as claimed in claim 15 is able to carry out.

20. a communication system comprises network equipment as claimed in claim 17 and subscriber equipment as claimed in claim 19.

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