CN102143500A - Method and device for configuring cell bandwidth - Google Patents

Abstract

The embodiment of the present invention discloses a cell bandwidth configuration method and equipment, which can flexibly plan the system bandwidth of each cell, and is suitable for spectrum resources of any width. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell is preferentially used Own exclusive or relatively exclusive frequency resources.

Description

Method and device for configuring cell bandwidth

technical field

The embodiments of the present invention relate to the field of communication technologies, and in particular to a cell bandwidth configuration method and device.

Background technique

TD-LTE (Time Division-Synchronous Code Division Multiple Access LongTerm Evolution, the long-term evolution of Time Division Synchronous Code Division Multiple Access), as an advanced technology, requires the system to improve the peak data rate, cell edge rate, spectrum utilization, and focus on To further improve the cost of operation and network construction, and to enable users to obtain the "Always Online (always online)" experience, it is necessary to reduce the delay of the control and user planes. The system must be able to coexist with existing systems (2G/2.5G/3G).

To do this, the existing system needs to change in a number of ways:

On the radio access network (Radio Access Network, RAN) side, the CDMA technology will be changed to the OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Modulation) technology that can more effectively combat multipath interference in broadband systems.

OFDM technology originated in the 1960s, and has been continuously improved and developed since then. After the 1990s, with the development of signal processing technology, it has been widely used in digital broadcasting, DSL and wireless LAN and other fields. OFDM technology has the advantages of anti-multipath interference, simple implementation, flexible support for different bandwidths, high spectrum utilization and efficient adaptive scheduling, etc. It is recognized as a future 4G reserve technology.

In order to further improve spectrum efficiency, MIMO (Multiple-Input Multiple-Out-put, multiple-input/multiple-output) technology has also become a mandatory technology for LTE.

MIMO technology utilizes the spatial channel characteristics of the multi-antenna system to transmit multiple data streams at the same time, thus effectively improving the data rate and spectrum efficiency.

In order to reduce the delay of the control and user planes and meet the requirements of low delay (the delay of the control plane is less than 100ms, and the delay of the user plane is less than 5ms), the structure of the current NodeB-RNC-CN must be simplified, and the RNC as a physical entity will not After existing, the NodeB will have some functions of the RNC and become an eNodeB, and the eNodeBs will be connected to the CN through the X2 interface for mesh interconnection. This system change will definitely affect the change of network architecture, SAE (System Architecture Evolution) is also in progress, and 3GPP is also planning for the smooth evolution of RAN/CN.

As a requirement of LTE, the evolution of the TDD system and the evolution of the FDD system are carried out simultaneously.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

TD-LTE mainly has the following two typical networking methods in frequency planning:

Prior Art 1: As shown in FIG. 1 , the frequency reuse factor is N (N is an integer greater than 1). Each cell uses different frequency bands, the interference between cells is small, and the actual network planning is simple, but the frequency utilization rate of the entire network is low.

Prior Art 2: As shown in FIG. 2 , the frequency reuse factor is 1. Each cell uses the same frequency band, and the overall frequency utilization rate is high, but inter-cell interference is relatively large, especially for edge users. ICIC (Inter-Cell Interference Coordination) must be combined to suppress interference and optimize the network.

Contents of the invention

The embodiment of the present invention discloses a cell bandwidth configuration method and equipment, which can flexibly plan the system bandwidth of each cell, and is suitable for spectrum resources of any width. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell is preferentially used Own exclusive or relatively exclusive frequency resources.

In order to achieve the above purpose, an embodiment of the present invention provides a cell bandwidth configuration method on the one hand, which is applied to a communication system including at least one cell cluster, and the cell cluster includes a plurality of adjacent cells, which is characterized in that it specifically includes the following step:

According to the number of adjacent cells in the cell cluster, the total bandwidth is divided into a corresponding number of bandwidth subsets, and each of the bandwidth subsets has overlapping bandwidth;

Allocating bandwidths corresponding to the respective bandwidth subsets to corresponding adjacent cells.

Preferably, each of the bandwidth subsets is specifically:

each of said subsets of bandwidth has overlapping bandwidth with one or more of the other subsets of bandwidth; or,

A plurality of the bandwidth subsets have overlapping bandwidths.

Preferably, after allocating the bandwidths corresponding to the respective bandwidth subsets to corresponding adjacent cells, the method further includes:

When the load of this cell is lower than the preset load threshold, the frequency of non-overlapping between this cell and other adjacent cells is preferentially used;

When the load of the local cell exceeds the preset load threshold, the frequency that does not overlap between the local cell and other adjacent cells is preferentially used to schedule services with high QoS requirements.

On the other hand, an embodiment of the present invention also provides a cell bandwidth configuration device, which is applied to a communication system including at least one cell cluster, and the cell cluster includes multiple adjacent cells, specifically including:

A division module, configured to divide the total bandwidth into a corresponding number of bandwidth subsets according to the number of adjacent cells in the cell cluster, and each of the bandwidth subsets has overlapping bandwidth;

An allocating module, configured to allocate the bandwidth corresponding to each bandwidth subset divided by the dividing module to corresponding adjacent cells.

Preferably, each of the bandwidth subsets is specifically:

each of said subsets of bandwidth has overlapping bandwidth with one or more of the other subsets of bandwidth; or,

A plurality of the bandwidth subsets have overlapping bandwidths.

Preferably, the device further includes a detection module, configured to detect the load status of the current cell after allocating the bandwidths corresponding to the respective bandwidth subsets to the corresponding adjacent cells, and determine the difference between the load status of the current cell and the preset Relationship between load thresholds.

Preferably, the device also includes a scheduling module, configured to:

When the detection module detects that the load of the local cell is lower than the preset load threshold, the non-overlapping frequencies of the local cell and other adjacent cells are preferentially used;

When the detection module detects that the load of the local cell exceeds the preset load threshold, the frequency of non-overlapping between the local cell and other adjacent cells is preferentially used to schedule services with high QoS requirements.

Compared with the prior art, the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the frequency planning scheme of the cell can be flexibly planned, which is applicable to any width of the system bandwidth. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell preferentially uses its own exclusive or relative Exclusive frequency band resources.

Description of drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the present invention or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the invention, those skilled in the art can also obtain other drawings according to these drawings without paying creative efforts.

FIG. 1 is a schematic diagram of bandwidth configuration of TD-LTE in frequency planning in the prior art;

FIG. 2 is a schematic diagram of another TD-LTE bandwidth configuration during frequency planning in the prior art;

FIG. 3 is a schematic flowchart of a cell bandwidth configuration method proposed by an embodiment of the present invention;

4 is a schematic diagram of a specific bandwidth division method of a cell bandwidth configuration method in a specific application scenario proposed by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a specific bandwidth division method of another cell bandwidth configuration method in a specific application scenario proposed by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a specific bandwidth division method of another cell bandwidth configuration method in a specific application scenario proposed by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an apparatus for configuring cell bandwidth according to an embodiment of the present invention.

Detailed ways

In order to solve the problems existing in the prior art, a cell bandwidth configuration method proposed by an embodiment of the present invention defines a set of cells that are close together as a cell cluster, and divides the total available bandwidth into multiple subsets, wherein, The bandwidths of any two subsets may partially overlap or not overlap at all. After the allocation is completed, each subset is allocated to multiple cells in a cell cluster.

This flexible cell frequency planning solution is applicable to any wide system bandwidth. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell preferentially uses its own or relatively exclusive frequency band resources; when the load is heavy, Each cell can use its allocated bandwidth. At this time, it can be considered to allocate "exclusive" frequency bands to cell edge users who need high power to avoid interference.

This method is flexible on the basis of complete orthogonal frequency multiplexing, all configurations are predictable, and the network will not change dynamically. At the same time, the complexity of the scheduling algorithm will not be too large. There are many ways to configure the frequency ratio and edge power.

As shown in FIG. 3 , it is a schematic flowchart of a cell bandwidth configuration method proposed by an embodiment of the present invention. The method is applied to a communication system including at least one cell cluster, and the cell cluster includes a plurality of adjacent cells, specifically including The following steps:

Step S301 , according to the number of adjacent cells in the cell cluster, divide the total bandwidth into a corresponding number of bandwidth subsets, and each of the bandwidth subsets has overlapping bandwidth.

Wherein, each of the bandwidth subsets is specifically:

each of said subsets of bandwidth has overlapping bandwidth with one or more of the other subsets of bandwidth; or,

A plurality of the bandwidth subsets have overlapping bandwidths.

Step S302. Allocate bandwidths corresponding to the respective bandwidth subsets to corresponding adjacent cells.

In a specific application scenario, after allocating the bandwidth corresponding to each bandwidth subset to the corresponding adjacent cell, it also includes:

Detect the load status of each cell;

When the load of this cell is lower than the preset load threshold, the frequency of non-overlapping between this cell and other adjacent cells is preferentially used;

When the load of the local cell exceeds the preset load threshold, the frequency that does not overlap between the local cell and other adjacent cells is preferentially used to schedule services with high QoS requirements.

Compared with the prior art, the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the frequency planning scheme of the cell can be flexibly planned, which is applicable to any width of the system bandwidth. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell preferentially uses its own exclusive or relative Exclusive frequency band resources.

In the following, the technical solutions of the embodiments of the present invention will be described further in combination with specific examples.

Assuming that the total bandwidth is 30MHz, network planning can be carried out according to the following scheme:

Divide the 30M bandwidth into three parts according to the aforementioned principle, each part is 20MHz, and the two parts overlap, and then allocate one part to the three sectors of the same site.

The specific division method is shown in Figure 4.

If the system bandwidth resource is 40MHz or 50MHz, the same principle can also be applied, and the frequency can be divided as shown in Figure 5 and Figure 6. Due to the increase of bandwidth, its ability to avoid interference will be improved, and the dependence on ICIC algorithm and scheduling algorithm The performance will be further reduced, resulting in better system performance.

Compared with the prior art, the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the frequency planning scheme of the cell can be flexibly planned, which is applicable to any width of the system bandwidth. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell preferentially uses its own exclusive or relative Exclusive frequency band resources.

In order to realize the technical solution of the embodiment of the present invention, the embodiment of the present invention also proposes a device for configuring cell bandwidth, which is applied to a communication system including at least one cell cluster, and the cell cluster includes a plurality of adjacent cells. The schematic diagram of its structure As shown in Figure 7, specifically include:

A division module 71, configured to divide the total bandwidth into a corresponding number of bandwidth subsets according to the number of adjacent cells in the cell cluster, and each of the bandwidth subsets has overlapping bandwidth;

Wherein, each of the bandwidth subsets is specifically:

each of said subsets of bandwidth has overlapping bandwidth with one or more of the other subsets of bandwidth; or,

A plurality of the bandwidth subsets have overlapping bandwidths.

The allocating module 72 is configured to allocate the bandwidth corresponding to each bandwidth subset divided by the dividing module 71 to corresponding adjacent cells.

In a specific application scenario, the above device further includes a detection module 73, which is connected to the division module 71, and is used to detect the current cell after the bandwidth corresponding to each bandwidth subset is allocated to the corresponding adjacent cell. load status, and judge the relationship between the load status of the cell and the preset load threshold.

Further, a scheduling module 74 is also included for:

When the detection module 73 detects that the load of the current cell is lower than the preset load threshold, the non-overlapping frequencies of the current cell and other adjacent cells are preferentially used;

When the detection module 73 detects that the load of the local cell exceeds the preset load threshold, the frequency that does not overlap between the local cell and other adjacent cells is preferentially used to schedule services with high QoS requirements.

Compared with the prior art, the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the frequency planning scheme of the cell can be flexibly planned, which is applicable to any width of the system bandwidth. In the allocation of frequency resources, the natural isolation of resources can be used, and each cell preferentially uses its own exclusive or relative Exclusive frequency band resources.

Through the above description of the implementation manners, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), Several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various implementation scenarios of the embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred implementation scenario, and the modules or processes in the drawing are not necessarily necessary for implementing the embodiments of the present invention.

Those skilled in the art can understand that the modules in the devices in the implementation scenario can be distributed among the devices in the implementation scenario according to the description of the implementation scenario, or can be located in one or more devices different from the implementation scenario according to corresponding changes. The modules of the above implementation scenarios can be combined into one module, or can be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the pros and cons of the implementation scenarios.

The above disclosures are only some specific implementation scenarios of the embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the embodiments of the present invention.

Claims (7)

1. bandwidth of cell collocation method is applied to comprise that described cell cluster comprises a plurality of neighbor cells, it is characterized in that, specifically may further comprise the steps in the communication system of at least one cell cluster:

According to the neighbor cell quantity in the cell cluster, total bandwidth is divided into the bandwidth subclass of respective numbers, there is overlapping bandwidth in each described bandwidth subclass;

The pairing bandwidth of described each bandwidth subclass is distributed to corresponding neighbor cell respectively.

2. the method for claim 1 is characterized in that, each described bandwidth subclass is specially:

Each described bandwidth subclass all has the bandwidth of coincidence with other one or several bandwidth subclass; Or,

A plurality of in each described bandwidth subclass have the coincidence bandwidth.

3. the method for claim 1 is characterized in that, the pairing bandwidth of described each bandwidth subclass is distributed to respectively after the corresponding neighbor cell, also comprises:

When this cell load is lower than default load threshold, preferentially use this sub-district and the non-overlapped frequency of other neighbor cells;

When this cell load surpasses default load threshold, preferentially use the non-overlapped frequency of this sub-district and other neighbor cells to dispatch the high business of qos requirement.

4. bandwidth of cell inking device is applied to comprise that described cell cluster comprises a plurality of neighbor cells, it is characterized in that, specifically comprises in the communication system of at least one cell cluster:

Divide module, be used for the neighbor cell quantity according to cell cluster, total bandwidth is divided into the bandwidth subclass of respective numbers, there is overlapping bandwidth in each described bandwidth subclass;

Distribution module, the pairing bandwidth of each bandwidth subclass that is used for described division module is divided is distributed to corresponding neighbor cell respectively.

5. device as claimed in claim 4 is characterized in that, each described bandwidth subclass is specially:

Each described bandwidth subclass all has the bandwidth of coincidence with other one or several bandwidth subclass; Or,

A plurality of in each described bandwidth subclass have the coincidence bandwidth.

6. device as claimed in claim 4, it is characterized in that, also comprise detection module, be used for after giving corresponding neighbor cell the pairing allocated bandwidth of described each bandwidth subclass, detect this cell load state, and judge the relation between this cell load state and the default load threshold.

7. device as claimed in claim 6 is characterized in that, also comprises being used for scheduler module:

When described detection module detects this cell load and is lower than default load threshold, preferentially use this sub-district and the non-overlapped frequency of other neighbor cells;

When described detection module detects this cell load and surpasses default load threshold, preferentially use the non-overlapped frequency of this sub-district and other neighbor cells to dispatch the high business of qos requirement.

Images