WO2016101518A1 - 小小区频率资源的分配方法及装置 - Google Patents

小小区频率资源的分配方法及装置 Download PDF

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Publication number
WO2016101518A1
WO2016101518A1 PCT/CN2015/079314 CN2015079314W WO2016101518A1 WO 2016101518 A1 WO2016101518 A1 WO 2016101518A1 CN 2015079314 W CN2015079314 W CN 2015079314W WO 2016101518 A1 WO2016101518 A1 WO 2016101518A1
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frequency resource
small cell
neighboring
cell
target
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PCT/CN2015/079314
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English (en)
French (fr)
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张瑜
王欣晖
张璐
孙阳
常永宇
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中兴通讯股份有限公司
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Publication of WO2016101518A1 publication Critical patent/WO2016101518A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the present invention relates to the field of communications, and in particular to a method and an apparatus for allocating small cell frequency resources.
  • Heterogeneous Network refers to the addition of a low power base station (Low Power NodeB, LNB for short) to the macro cellular network formed by the original macro station NodeB (Macro NodeB, MNB for short) and the service user.
  • the LNB includes: Micro, Pico, and Femto, and the user adaptively accesses the network selected by accessing the MNB and the LNB according to the location, the power of the signals received by the two base stations, and the like.
  • Both the MNB and the LNB can serve as the serving base station of the user, and since the LNB can supplement the MNB, share the burden of the MNB, and fill the coverage area of the MNB, the heterogeneous network often has higher capacity and better coverage.
  • LTE/LTE-A HetNet and HSPA HetNet have experienced more mature discussions and have already had quite a lot of mature research results.
  • the Ultra Dense Network (UDN) in 5G technology is a further enhancement of HetNet.
  • Ultra-dense network deployment refers to arranging a large number of small cells (micro cells) within the scope of a macro cell.
  • the number of small cells can reach the level of hundreds of LNBs within a MNB range, and UDN will greatly enhance the entire network.
  • UDN will also guarantee the full coverage of the service area, and basically will not cover the dead end. Based on these advantages, UDN is identified as one of the key technologies of 5G technology.
  • LTE/LTE-A HetNet and HSPA HetNet the number of small cells is often several to several tens of each MNB, and the distance between LNBs is large. At this time, due to the limitation of LNB transmission power between adjacent cells, Will not cause more obvious interference.
  • the small cells are basically squatting with the small cells, and even the boundary squeeze between the small cells occurs, that is, at the boundary, the downlink pilot signal strengths of the plurality of LNBs are stronger than the downlink pilot signals of the MNB. strength.
  • the frequency resources used by each small cell are not allocated reasonably, then in the small cell The user will generate strong uplink interference to neighboring cells, and the neighboring cell will also cause strong downlink interference to users in the cell, which will result in a decline in overall network performance.
  • the main purpose of the embodiments of the present invention is to provide a method and a device for allocating small cell frequency resources, so as to at least solve the problem that when the small cells are deployed in a large number of related technologies in an ultra-dense network, the interference between the small cells is strong, and the overall performance of the network is degraded.
  • the problem when the small cells are deployed in a large number of related technologies in an ultra-dense network, the interference between the small cells is strong, and the overall performance of the network is degraded.
  • a method for allocating a small cell frequency resource including: when a designated small cell is switched from an off state to an on state, acquiring designation information of a neighboring cell corresponding to the designated small cell, where And the specified information is used to reflect the interference situation of each of the neighboring cells to the designated small cell; and the frequency resource of the designated small cell is allocated according to the specified information.
  • acquiring the specified information of the neighboring cell corresponding to the specified small cell includes: acquiring information for indicating the state of the neighboring cell switch; and acquiring, by the specified small cell, each of the specified open cells The RSRP value of the neighboring cell; the information about the frequency resource occupancy of all the neighboring cells in the open state.
  • the allocating the frequency resource of the designated small cell according to the specified information includes: when the frequency resource occupation information indicates that the frequency resource block is not occupied, the frequency resource that is not occupied The block is the first frequency resource of the designated small cell, where the first frequency resource is an exclusive frequency resource of the designated small cell.
  • the allocating the frequency resource of the designated small cell according to the specified information includes: when the frequency resource occupation information indicates that there is no unoccupied frequency resource block, selecting the second frequency resource One or more neighboring cells are determined as a first target neighboring cell, wherein the second frequency resource is a shared frequency resource of the first target neighboring cell; and an RSRP value of all neighboring cells in the first target neighboring zone
  • the first request message is sent to the central control node, where the first request message is used to indicate that the first target neighboring area releases the second frequency resource; and received in response to the first a response message of the request message, wherein the response message is used to indicate that the central control node uses the second frequency resource as the first frequency resource of the designated small cell; or, in the first target neighbor Sending a second request message to the central control node, where the second request message is used to indicate the designated small cell and the first part, when the RSRP value of the partial neighboring area is higher than the predetermined threshold
  • the allocating the frequency resource of the designated small cell according to the specified information includes: indicating, in the frequency resource occupation information, that the frequency resource block that is not occupied is not present, and the first target neighboring cell If the second frequency resource is not available, the neighboring area with the lowest RSRP value is selected as the second target neighboring area from the neighboring areas of the designated small cell; and the third request message is sent to the central control node, where The third request message is used to request the specified small cell to share the frequency resource of the second target with the second target neighboring cell, and use the frequency resource as the designated small cell and the second target neighboring cell.
  • the third frequency resource, where the third frequency resource is a frequency resource exclusive to the designated small cell and the second target neighboring cell.
  • the method further includes: when the designated small cell is switched from the on state to the off state, releasing the frequency resource occupied by the designated small cell.
  • a device for allocating a small cell frequency resource comprising: an obtaining module, configured to acquire a neighbor corresponding to the designated small cell when the designated small cell is switched from an off state to an on state The specified information of the area, where the specified information is used to reflect the interference situation of each of the neighboring areas to the designated small cell; and the allocation module is configured to allocate the frequency resource of the designated small cell according to the specified information.
  • the acquiring module includes: a first acquiring unit, configured to acquire information for indicating a state of the neighboring switch; and a second acquiring unit, configured to acquire the specified small cell with respect to each The RSRP value of the neighboring cell in the open state, and the third acquiring unit, configured to acquire information about the frequency resource occupancy of all the neighboring cells in the open state.
  • the allocating module includes: a determining unit, configured to determine, when the frequency resource occupation information indicates that the frequency resource block is not occupied, determine the unoccupied frequency resource block as the Specifying a first frequency resource of the small cell, where the first frequency resource is an exclusive frequency resource of the designated small cell.
  • the allocating module includes: a selecting unit, configured to: when the frequency resource occupation information indicates that there is no unoccupied frequency resource block, select one or more neighbors having a second frequency resource The area is the first target neighboring cell, where the second frequency resource is a shared frequency resource of the first target neighboring cell, and the first sending unit is configured as an RSRP of all neighboring areas in the first target neighboring area.
  • the first request message is sent to the central control node, where the first request message is used to indicate that the first target neighboring area releases the second frequency resource; and the receiving unit is configured to receive the response.
  • a response message of the first request message where the response message is used to indicate that the central control node uses the second frequency resource as the first frequency resource of the designated small cell; or, second a sending unit, configured to send a second request message to the central control node when the RSRP value of the partial neighboring area in the first target neighboring area is higher than a predetermined threshold, where The second request message is used to indicate that the designated small cell shares the second frequency resource with the first target neighboring cell.
  • the allocating module includes: a second selecting unit, configured to: in the frequency resource occupation information, indicating that there is no unoccupied frequency resource block, and the first target neighboring area does not have In the second frequency resource, the neighboring area with the lowest RSRP value is selected as the second target neighboring area from the neighboring area of the designated small cell; and the third sending unit is configured to send the third request message to the central control node.
  • the third request message is used to request the specified small cell to share the frequency resource of the second target with the second target neighboring cell, and use the frequency resource as the designated small cell and the first a third frequency resource of the second target neighboring cell, where the third frequency resource is a frequency resource exclusive to the designated small cell and the second target neighboring cell.
  • the frequency resource of the designated small cell is allocated according to the specified information of the neighboring cell corresponding to the designated small cell, and the related technology is super-dense.
  • the interference between the small cells is strong, which causes the overall performance of the network to degrade.
  • the resource utilization of the small cells is improved, and the overall performance of the network is improved.
  • FIG. 1 is a flowchart of a method for allocating small cell frequency resources according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a device for allocating a small cell frequency resource according to an embodiment of the present invention
  • FIG. 3 is a block diagram 1 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention
  • FIG. 4 is a block diagram 2 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention
  • FIG. 5 is a block diagram 3 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention
  • FIG. 6 is a block diagram 4 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a distribution structure of a small cell in a UDN network according to an alternative embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a state of a small cell in a UDN according to an alternative embodiment of the present invention.
  • FIG. 9 is a flowchart 1 of a method for acquiring feedback switch state information and band occupancy information according to an alternative embodiment of the present invention.
  • FIG. 10 is a second flowchart of a method for obtaining feedback switch state information and band occupancy information according to an alternative embodiment of the present invention
  • FIG. 11 is a flowchart of a method for applying a frequency resource according to an alternative embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a small cell frequency resource occupancy situation according to an alternative embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for allocating a small cell frequency resource according to an embodiment of the present invention. As shown in FIG. 1 , the steps of the method include:
  • Step S102 When the designated small cell is changed from the off state to the on state, acquiring the designation information of the neighboring cell corresponding to the designated small cell;
  • the specified information is used to reflect the interference situation of each neighboring cell to the designated small cell
  • Step S104 Allocating a frequency resource of the designated small cell according to the specified information.
  • the frequency resource of the designated small cell is allocated according to the specified information of the neighboring cell corresponding to the designated small cell, and the related technology ultra-dense network is solved.
  • the interference between the small cells is strong, resulting in a problem of the overall performance degradation of the network, improving the resource utilization of the small cells, thereby improving the overall performance of the network.
  • the manner of obtaining the designation information of the neighboring cell corresponding to the specified small cell involved in the step S102 is different in the embodiment, and in an optional implementation manner of the embodiment, the following manner can be implemented. :
  • Step S11 Acquire information for indicating a state of a neighboring switch
  • the neighboring area in the open state is obtained through the switch state information
  • Step S12 Acquire an RSRP value of the designated small cell with respect to each adjacent zone in an open state
  • Step S13 Acquire information about the frequency resource occupation status of all neighboring areas in the open state.
  • the frequency resource occupancy condition is used to indicate whether there is an unoccupied frequency resource block.
  • the method for allocating the frequency resource in another optional implementation manner of the optional embodiment may be implemented as follows:
  • the second request message is sent to the central control node, where the second request message is used to indicate that the designated small cell shares the second with the first target neighboring cell. Frequency resource.
  • the frequency resource occupied by the designated small cell may be released.
  • a device for allocating a small cell frequency resource is also provided, and the device is used to implement the foregoing embodiment and the optional implementation manner, and details are not described herein.
  • the term "module” A "unit” can implement a combination of software and/or hardware for a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • the device includes: an obtaining module 22, configured to acquire and when a designated small cell is switched from an off state to an on state. Specifying the specified information of the neighboring cell corresponding to the small cell, where the specifying information is used to reflect the interference situation of each neighboring cell to the designated small cell; the allocating module 24 is coupled with the obtaining module 22, and is configured to allocate the frequency of the designated small cell according to the specified information. Resources.
  • FIG. 3 is a block diagram of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention.
  • the acquiring module 22 includes: a first acquiring unit 32, configured to acquire a neighboring area switch state.
  • the second obtaining unit 34 is coupled to the first obtaining unit 32, and is configured to acquire an RSRP value of the designated small cell relative to each adjacent area in an open state;
  • the third obtaining unit 36 is coupled to the second obtaining unit 34. , set to get information about the frequency resource occupancy of all neighbors in the open state.
  • FIG. 4 is a block diagram 2 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention.
  • the allocation module 24 includes: a determining unit 42 configured to indicate that the frequency resource occupation information is unoccupied.
  • the unoccupied frequency resource block is determined as the first frequency resource of the designated small cell, where the first frequency resource is the exclusive frequency resource of the designated small cell.
  • FIG. 5 is a block diagram 3 of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention.
  • the allocation module 24 includes: a selecting unit 52, configured to indicate that the frequency resource occupation information does not exist and is not occupied.
  • the first sending unit 54 setting When the RSRP value of all the neighboring cells in the first target neighboring cell is higher than the predetermined threshold, the first request message is sent to the central control node, where the first request message is used to indicate that the first target neighboring cell releases the second frequency resource;
  • the receiving unit 56 is coupled to the first sending unit 54 and configured to receive a response message in response to the first request message, where the response message is used to indicate that the central control node uses the second frequency resource as the first frequency resource of the designated small cell; or,
  • the second sending unit 58 is configured to send a second request message to the central control node when the RSRP value of the partial neighboring area in the first target neighboring area is higher than a predetermined threshold, where the second request message is used to indicate the designated small cell and The first target neighboring area shares the second frequency resource.
  • FIG. 6 is a block diagram of an optional structure of a frequency resource allocation apparatus for a small cell according to an embodiment of the present invention.
  • the allocation module 24 includes: a second selection unit 62 configured to indicate that the frequency resource occupation information does not exist.
  • the third sending unit 64 Second selection unit a coupling connection, configured to send a third request message to the central control node, where the third request message is used to request the designated small cell to share the frequency resource of the second target with the second target neighboring cell, and use the frequency resource as the designated small.
  • the present invention provides a method for applying a frequency resource pre-application after a small cell is opened in a UDN scenario by using a UDN as an application scenario, and introducing influences on the frequency resource application of the cell by introducing factors such as neighbor cell interference and frequency resource occupation status. .
  • the small cell base station in the UDN needs to be able to receive the switch state information and the frequency resource occupation status information of the neighboring cell sent by the other base station or the central control node, so that the newly opened small cell is more reasonable. Frequency resource application.
  • Step S202 When a small cell changes from the off state to the on state, the state control node sends status transition information to activate the frequency resource pre-application operation.
  • Step S204 The small cell sends the switch state and the frequency resource occupation information feedback request to the neighboring station, or after the central control node receives the state transition information of the cell, the neighboring area information of the area is directly sent, so that the newly opened The cell determines the frequency resource to apply for by the neighboring area information.
  • Step S206 After acquiring the switch state of the neighboring station, the neighboring cells of all open states are selected, and the RSRP (Reference Signal Receiving Power) is measured for the neighboring cells.
  • RSRP Reference Signal Receiving Power
  • Step S208 After the base station of the small cell completes the RSRP measurement of the neighboring stations in all open states, the measurement results are sorted from high to low. The higher the RSRP, the higher the RSRP is, when the two use the same frequency band, the cell is affected by the neighboring cell. The interference is stronger.
  • Step S210 The base station determines whether there is an unoccupied frequency resource block by using the frequency resource occupation information fed back by the neighboring station, and performs a frequency resource application according to the determination result.
  • Step S212 If there is an unoccupied frequency resource block, the base station directly requests the central control node to occupy the unused frequency resource of the corresponding size according to the requirement, and uses it as the first frequency resource of the base station.
  • Step S214 If there is no unoccupied frequency resource block, it is detected whether the neighboring station uses the second frequency resource according to whether the presence of the neighboring station is high or low respectively.
  • the first frequency resource is an exclusive resource to ensure that each open cell can guarantee the most basic data service, and only when the interference between two adjacent cells is low and there is no other available frequency resource.
  • the first frequency resource of the two cells is multiplexed; the second frequency resource belongs to the shared resource, and in the case that the interference between the neighboring cells is low, multiple cells may be used to improve the respective service quality.
  • Step S216 If there is a second frequency resource used by the neighboring station, the neighboring station having the higher average RSRP value and having the second frequency resource in the ranking is selected as the target. At the same time, the RSRP threshold value 1 is set, and the remaining neighboring stations occupying the target frequency band are selected. When the RSRP measurement value of the selected neighboring station is higher than the threshold value, the micro base station sends a request to the central control node to release the second frequency resource of the target neighboring station. The second frequency resource of the neighboring station with the RSRP value higher than the threshold one is used as its own first frequency resource; otherwise, only the second frequency resource requesting to release the target neighboring station is sent to the central control node for its own use.
  • Step S218 After receiving the request of the station, the central control node sends the second frequency resource revocation indication to all target cells, so that the micro cell is used as the first frequency resource.
  • Step S220 If the second frequency resource is not used by the neighboring station, the neighboring station with the lowest RSRP value in the sorting is selected as the target, and the base station sends a request to the MNB to multiplex the same frequency resource with the target base station, and the resource block is respectively two.
  • the first frequency resource of the base station If the second frequency resource is not used by the neighboring station, the neighboring station with the lowest RSRP value in the sorting is selected as the target, and the base station sends a request to the MNB to multiplex the same frequency resource with the target base station, and the resource block is respectively two.
  • the first frequency resource of the base station is respectively two.
  • Step S222 When the cell is switched from the on state to the off state, the frequency resource occupied by the cell is released and available to other cells as the first or second frequency resource.
  • FIG. 7 is a schematic diagram of a small cell distribution structure in a UDN network according to an alternative embodiment of the present invention.
  • a small cell serving by a micro base station there are many areas of a small cell serving by a micro base station, and the micro base station may be There are different types, such as Pico, Small Cell, Micro, Femto, etc., which can be collectively referred to as a low power transmitting base station LNB.
  • LNB low power transmitting base station
  • FIG. 8 is a schematic diagram of a switch state of a small cell in a UDN according to an alternative embodiment of the present invention.
  • FIG. 8 in the case of high-density deployment of a small cell, some cells are often in a low load condition, for energy conservation considerations. Some low-load small cells need to be turned off, which will result in a cell switching phenomenon as shown in FIG.
  • the process of applying and allocating frequency resources by the Small Cell may include the following steps:
  • Step S302 When a Small Cell changes from an OFF state to an ON state, acquiring neighboring station feedback switch state information and band occupancy information;
  • the frequency band occupation information should include: a frequency resource block occupancy situation, a division of the first frequency resource and the second frequency resource, so that the newly opened cell can apply for a better frequency resource more conveniently and accurately.
  • the first frequency resource is an exclusive resource to ensure that each open cell can guarantee the most basic data service, and only when the interference between two adjacent cells is low and there is no other available frequency resource.
  • the first frequency resource of the two cells is multiplexed; the second frequency resource belongs to the shared resource, and in the case that the interference between the neighboring cells is low, multiple cells may be used to improve the respective service quality.
  • Step S304 The cell adopts the sorting of the RSRP received value of the neighboring cell in the open state and the frequency resource occupancy state of the feedback back.
  • the frequency resource block is preferentially used to achieve the use of the frequency resource between the adjacent stations. If there is no unoccupied frequency resource, the frequency resource to be applied is determined according to the first and second frequency resource allocation status of the neighboring area and the RSRP ordering.
  • step S302 is described in the form of two specific embodiments.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the initial frequency resource request procedure of the cell is activated.
  • the location of each UE in the cell cannot be determined. Therefore, the interference situation of other UEs received by other UEs cannot be determined. Therefore, resources should be applied and allocated according to factors such as other cell usage frequency and RSRP, so as to avoid other cells from using the cell. Interference caused by the UE.
  • FIG. 9 is a flowchart 1 of a method for obtaining feedback switch state information and band occupancy information according to an optional embodiment of the present invention. The method includes the following steps:
  • Step S902 The small cell is changed from the OFF state to the ON state, and the initial frequency resource application process is activated.
  • Step S904 The small cell sends a switch state and frequency resource occupancy feedback request to the neighboring cell.
  • Step S906 After receiving the feedback request, the neighboring area sends its own switch state and frequency resource occupation information through the broadcast channel.
  • Step S908 After acquiring the switch state of the neighboring cell, the newly opened small cell performs measurement of the reference signal received power RSRP for all the neighboring cells in the open state, and sorts the measurement results.
  • FIG. 10 is a second flowchart of a method for obtaining feedback switch state information and band occupancy information according to an alternative embodiment of the present invention.
  • the method includes the following steps:
  • Step S1002 The small cell is changed from the OFF state to the ON state, and the initial frequency resource application process is activated.
  • Step S1004 The small cell sends the neighboring area switch state and the frequency resource occupancy information feedback to the master TP.
  • Step S1006 After receiving the request from the cell, the Master TP finds its neighboring cell according to the coordinate information of the small cell, and sends the real-time switch information and frequency resource occupation information of the neighboring cell.
  • Step S1008 After acquiring the switch state of the neighboring cell, the newly opened small cell performs measurement of the reference signal received power RSRP on all the neighboring cells in the open state, and sorts the measurement results.
  • FIG. 11 is a flowchart of a method for applying a frequency resource according to an alternative embodiment of the present invention. As shown in FIG. 11, an implementation method of step S304 of the optional embodiment includes the following steps:
  • Step S1102 Determine whether there is an unoccupied frequency resource; if there is an unoccupied frequency resource, skip to step S1104; otherwise, execute step S1106.
  • Step S1104 The small cell may directly apply to the central control node for the unoccupied frequency resource block of the corresponding size according to the user requirement for use by the user in the cell; and then perform step S1112;
  • Step S1106 determining whether there is a neighboring cell using the resource of the second frequency; when there is a second frequency resource in the neighboring cell, step S1108 is performed; otherwise, step S1110 is performed;
  • the first and second frequency usage of each neighboring cell are analyzed according to the frequency occupancy information fed back by the neighboring cell, so as to perform a better frequency resource application;
  • Step S1108 Apply to use the second frequency resource of the neighboring cell with the highest sorted RSRP measurement value and possessing the second frequency resource, and recover the part of the frequency resource;
  • the second frequency resource is characterized in that multiple neighboring cells may be shared and used.
  • the neighboring cell having the second frequency resource and having the highest rank in the RSRP order is selected as the target, and according to the first
  • the two frequency resources select all neighboring areas in which the frequency resources are used, compare the RSRP receiving values of the neighboring areas with the first preset value of the RSRP, and target all neighboring areas whose RSRP values are greater than the first preset value.
  • the cell then applies to the central control node to occupy the second frequency resource and recover the segment resources of all target cells.
  • the upper layer When receiving the frequency resource request, the upper layer will reclaim the second frequency resource of the target neighboring area and allocate it to the small cell used for the application.
  • the reason why the step is performed in this manner is that the second frequency resource belongs to the shared resource.
  • reclaiming the segment frequency of the cell with greater interference may cause minimum interference to other neighboring cells.
  • Step S1110 Send a frequency resource multiplexing request to the master TP and the lowest cell in the RSRP ordering;
  • the lowest neighboring cell in the RSRP scheduling is selected as the target, and the central control node is applied to multiplex the first frequency resource used by the neighboring cell.
  • Step S1112 The cell changes from the ON state to the OFF state, and the occupied frequency resource is released back into the resource pool, and is available for selection by other cells as the first or second frequency resource.
  • FIG. 12 is a schematic diagram of a small cell frequency resource occupancy situation and a RSRP ordering diagram according to an alternative embodiment of the present invention.
  • the small cell base station just opened by the cell a has cells b, c, d, e, f around it.
  • the central control node sends a request for acquiring neighboring area information; after receiving the request, the central control node finds all its neighboring cells b, c, d, e, f according to the coordinate information of a. And obtaining switch information and frequency resource occupation information of the cells according to the report information of the small cell nodes, and then transmitting the information to the small cell a.
  • the adjacent small cells that are turned on are b, c, d, e, f, and the RSRPs of these cells are obtained by measurement into cells c, f, e, b, d.
  • the base station a will apply The second frequency block 6 of the f base station serves as its own first frequency resource and requests the small cell f and the small cell b to release the block frequency resource, as shown in Table 1:
  • Table 2 shows the occupancy of the frequency resource blocks of the small cell a-small cell f after the above adjustment, as shown in Table 2:
  • the small cell when a small cell is turned on based on the cell switching mode, a request message for the neighboring cell switch state and the frequency resource occupancy condition, and a reference signal received power value of the cell to the neighboring cell are triggered; After the interference level of the adjacent area and the frequency resource occupation, the small cell comprehensively considers and applies for the optimal frequency resource for use, and the small cell can obtain the frequency resource with the least interference to the adjacent area by using the optional embodiment. In turn, the overall network performance can be improved.
  • the frequency resource of the designated small cell is allocated according to the designation information of the neighboring cell corresponding to the designated small cell.

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Abstract

本发明提供了一种小小区频率资源的分配方法及装置，其中该方法包括：在指定小小区由关闭状态转换为开启状态时，获取与指定小小区对应的邻区的指定信息，其中，指定信息用于反映各个邻区对指定小小区的干扰情况；依据指定信息分配指定小小区的频率资源。通过本发明，解决了相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题，提高了小小区的资源利用率，进而提升了网络的整体性能。

Description

小小区频率资源的分配方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种小小区频率资源的分配方法及装置。
背景技术
异构网络(Heterogeneous Network，简称为HetNet)是指在原有的宏站NodeB(Macro NodeB，简称为MNB)与服务用户所形成的宏蜂窝网络中加入低功率基站(Low Power NodeB，简称为LNB)，LNB包括：Micro、Pico以及Femto，用户根据自身位置，接收到两基站信号的功率等参数自适应地在接入MNB和LNB中进行选择的网络。MNB与LNB都可以作为用户的服务基站，并且由于LNB可以作为MNB的补充，分担MNB的负担，填补MNB的覆盖盲区，异构网络往往有着更高的容量和更好的覆盖效果。LTE/LTE-A HetNet和HSPA HetNet已经经历了较为成熟的讨论，并且已经具有很多相当成熟的研究成果。而目前，5G技术中的超密集网络(Ultra Dense Network,简称为UDN)就是HetNet的进一步增强。
超密集网络部署指的是在宏小区的范围内布置大量的小小区(微小区)，通常情况下小小区的数量能达到一个MNB范围内数百LNB的级别，UDN将极大地提升整个网络的容量，并且由于基站的平均发射功率大大变小，每个基站的容量和之前同构网络基本持平，所以UDN中能耗利用率将极大的提升。同时UDN还将很好的保证服务区域的全覆盖，基本上不会出现覆盖死角。基于以上这些优点，UDN被确定为5G技术的关键技术之一。
然而，在UDN中大量的小小区被部署在宏小区内，邻近小区之间的干扰问题也会因此突显。
在LTE/LTE-A HetNet和HSPA HetNet中，小小区的数量往往为每个MNB中几个到几十个，LNB之间距离较大，这时相邻小区之间由于LNB发射功率的限制，不会造成较为明显的干扰。
但是当小小区大量部署时，将可能达到每个MNB中有几百个LNB，此时LNB的间距将大幅减小。此时小小区基本上都是与小小区挨着，甚至还会出现小小区之间的边界挤压，即在边界处，多个LNB的下行导频信号强度均强于MNB的下行导频信号强度。此时，如果不对每个小小区所使用的频率资源进行合理的分配，那么小小区内 用户将对相邻小区产生很强的上行干扰，同时邻小区也会对本小区内用户造成很强的下行干扰，这样将导致网络整体性能的下降。
针对相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例的主要目的在于提供一种小小区频率资源的分配方法及装置，以至少解决相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题。
根据本发明的一个方面，提供了一种小小区频率资源的分配方法，包括：在指定小小区由关闭状态转换为开启状态时，获取与所述指定小小区对应的邻区的指定信息，其中，所述指定信息用于反映各个所述邻区对所述指定小小区的干扰情况；依据所述指定信息分配所述指定小小区的频率资源。
在本发明实施例中，获取与所述指定小小区对应的邻区的指定信息包括：获取用于指示所述邻区开关状态的信息；获取所述指定小小区相对于每一个处于开启状态的所述邻区的RSRP值；获取处于开启状态的所有所述邻区的频率资源占用情况的信息。
在本发明实施例中，依据所述指定信息分配所述指定小小区的频率资源包括：在所述频率资源占用信息指示存在未占用的所述频率资源块时，将未占用的所述频率资源块作为所述指定小小区的第一频率资源，其中，所述第一频率资源为所述指定小小区的独占频率资源。
在本发明实施例中，依据所述指定信息分配所述指定小小区的频率资源包括：在所述频率资源占用信息指示不存在未占用的所述频率资源块时，选择具有第二频率资源的一个或多个邻区确定为第一目标邻区，其中，所述第二频率资源为所述第一目标邻区的共享频率资源；在所述第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，所述第一请求消息用于指示所述第一目标邻区释放所述第二频率资源；并接收响应于所述第一请求消息的响应消息，其中，所述响应消息用于指示所述中心控制节点将所述第二频率资源作为所述指定小小区的所述第一频率资源；或，在所述第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，所述第二请求消息用于指示所述指定小小区与所述第一目标邻区共用所述第二频率资源。
在本发明实施例中，依据所述指定信息分配所述指定小小区的频率资源包括：在所述频率资源占用信息指示不存在未占用的所述频率资源块，且所述第一目标邻区的不具有所述第二频率资源时，从所述指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；向所述中心控制节点发送第三请求消息，其中，所述第三请求消息用于请求所述指定小小区与所述第二目标邻区共用所述第二目标的频率资源，并将该频率资源作为所述指定小小区与所述第二目标邻区的第三频率资源，其中，所述第三频率资源为所述指定小小区与所述第二目标邻区独占的频率资源。
在本发明实施例中，所述方法还包括：在所述指定小小区由开启状态转换为关闭状态时，释放所述指定小小区占用的频率资源。
根据本发明的另一个方面，提供了一种小小区频率资源的分配装置，包括：获取模块，设置为在指定小小区由关闭状态转换为开启状态时，获取与所述指定小小区对应的邻区的指定信息，其中，所述指定信息用于反映各个所述邻区对所述指定小小区的干扰情况；分配模块，设置为依据所述指定信息分配所述指定小小区的频率资源。
在本发明实施例中，所述获取模块包括：第一获取单元，设置为获取用于指示所述邻区开关状态的信息；第二获取单元，设置为获取所述指定小小区相对于每一个处于开启状态的所述邻区的RSRP值；第三获取单元，设置为获取处于开启状态的所有所述邻区的频率资源占用情况的信息。
在本发明实施例中，所述分配模块包括：确定单元，设置为在所述频率资源占用信息指示存在未占用的所述频率资源块时，将未占用的所述频率资源块确定为所述指定小小区的第一频率资源，其中，所述第一频率资源为所述指定小小区的独占频率资源。
在本发明实施例中，所述分配模块包括：选择单元，设置为在所述频率资源占用信息指示不存在未占用的所述频率资源块时，选择具有第二频率资源的一个或多个邻区作为第一目标邻区，其中，所述第二频率资源为所述第一目标邻区的共享频率资源；第一发送单元，设置为在所述第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，所述第一请求消息用于指示所述第一目标邻区释放所述第二频率资源；接收单元，设置为接收响应于所述第一请求消息的响应消息，其中，所述响应消息用于指示所述中心控制节点将所述第二频率资源作为所述指定小小区的所述第一频率资源；或，第二发送单元，设置为在所述第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，所 述第二请求消息用于指示所述指定小小区与所述第一目标邻区共用所述第二频率资源。
在本发明实施例中，所述分配模块包括：第二选择单元，设置为在所述频率资源占用信息指示不存在未占用的所述频率资源块，且所述第一目标邻区的不具有所述第二频率资源时，从所述指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；第三发送单元，设置为向所述中心控制节点发送第三请求消息，其中，所述第三请求消息用于请求所述指定小小区与所述第二目标邻区共用所述第二目标的频率资源，并将该频率资源作为所述指定小小区与所述第二目标邻区的第三频率资源，其中，所述第三频率资源为所述指定小小区与所述第二目标邻区独占的频率资源。
通过本发明实施例，采用在指定小小区由关闭状态转换为开启状态时，依据与该指定小小区对应的邻区的指定信息分配该指定小小区的频率资源的方式，解决了相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题，提高了小小区的资源利用率，进而提升了网络的整体性能。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的小小区频率资源的分配方法流程图；
图2是根据本发明实施例的小小区频率资源的分配装置结构框图；
图3是根据本发明实施例的小小区的频率资源的分配装置可选结构框图一；
图4是根据本发明实施例的小小区的频率资源的分配装置可选结构框图二；
图5是根据本发明实施例的小小区的频率资源的分配装置可选结构框图三；
图6是根据本发明实施例的小小区的频率资源的分配装置可选结构框图四；
图7是根据本发明可选实施例的UDN网络中小小区分布结构示意图；
图8是根据本发明可选实施例的UDN中小小区开关状态示意图；
图9是根据本发明可选实施例的获取反馈开关状态信息及频带占用信息的方法流程图一；
图10是根据本发明可选实施例获取反馈开关状态信息及频带占用信息的方法流程图二；
图11是根据本发明可选实施例的频率资源的申请方法流程图；
图12是根据本发明可选实施例小小区频率资源占用情况示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
本实施例提供了一种小小区频率资源的分配方法，图1是根据本发明实施例的小小区频率资源的分配方法流程图，如图1所示，该方法的步骤包括：
步骤S102：在指定小小区由关闭状态转换为开启状态时，获取与指定小小区对应的邻区的指定信息；
其中，指定信息用于反映各个邻区对指定小小区的干扰情况；
步骤S104：依据指定信息分配指定小小区的频率资源。
通过本实施例，采用在指定小小区由关闭状态转换为开启状态时，依据与该指定小小区对应的邻区的指定信息分配该指定小小区的频率资源的方式，解决了相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题，提高了小小区的资源利用率，进而提升了网络的整体性能。
对于步骤S102中涉及到的获取与指定小小区对应的邻区的指定信息的方式，在本实施例中有多种，其中，在本实施例的一个可选实施方式中可以通过如下方式来实现：
步骤S11：获取用于指示邻区开关状态的信息；
其中，通过开关状态信息，获取到处于开状态的邻区；
步骤S12：获取指定小小区相对于每一个处于开启状态的邻区的RSRP值；
其中，对获取到的所有RSRP值进行排序；
步骤S13：获取处于开启状态的所有邻区的频率资源占用情况的信息。
其中，该频率资源占用情况用于指示是否具有未占用的频率资源块。
对于本实施例中涉及到的依据指定信息分配指定小小区的频率资源的方式，在本可选实施例的另一个可选实施方式中频率资源的分配方式可以通过如下方式来实现：
方式一：在频率资源占用信息指示存在未占用的频率资源块时，将未占用的频率资源块作为指定小小区的第一频率资源，其中，第一频率资源为指定小小区的独占频率资源。
方式二：在频率资源占用信息指示不存在未占用的频率资源块时，选择具有第二频率资源的一个或多个邻区确定为第一目标邻区，其中，第二频率资源为第一目标邻区的共享频率资源；
在第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，第一请求消息用于指示第一目标邻区释放第二频率资源；并接收响应于第一请求消息的响应消息，其中，响应消息用于指示中心控制节点将第二频率资源作为指定小小区的第一频率资源；或，
在第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，第二请求消息用于指示指定小小区与第一目标邻区共用第二频率资源。
方式三：在频率资源占用信息指示不存在未占用的频率资源块，且第一目标邻区的不具有第二频率资源时，从指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；
向中心控制节点发送第三请求消息，其中，第三请求消息用于请求指定小小区与第二目标邻区共用第二目标的频率资源，并将该频率资源作为指定小小区与第二目标邻区的第三频率资源，其中，第三频率资源为指定小小区与第二目标邻区独占的频率资源。
对于本实施例中的指定小小区，在指定小小区由开启状态转换为关闭状态时，可以释放指定小小区占用的频率资源。
在本实施例中还提供了一种小小区频率资源的分配装置，该装置用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块” “单元”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图2是根据本发明实施例的小小区频率资源的分配装置结构框图，如图2所示，该装置包括：获取模块22，设置为在指定小小区由关闭状态转换为开启状态时，获取与指定小小区对应的邻区的指定信息，其中，指定信息用于反映各个邻区对指定小小区的干扰情况；分配模块24与获取模块22耦合连接，设置为依据指定信息分配指定小小区的频率资源。
图3是根据本发明实施例的小小区的频率资源的分配装置可选结构框图一，如图3所示，获取模块22包括：第一获取单元32，设置为获取用于指示邻区开关状态的信息；第二获取单元34与第一获取单元32耦合连接，设置为获取指定小小区相对于每一个处于开启状态的邻区的RSRP值；第三获取单元36与第二获取单元34耦合连接，设置为获取处于开启状态的所有邻区的频率资源占用情况的信息。
图4是根据本发明实施例的小小区的频率资源的分配装置可选结构框图二，如图4所示，分配模块24包括：确定单元42，设置为在频率资源占用信息指示存在未占用的频率资源块时，将未占用的频率资源块确定为指定小小区的第一频率资源，其中，第一频率资源为指定小小区的独占频率资源。
图5是根据本发明实施例的小小区的频率资源的分配装置可选结构框图三，如图5所示，分配模块24包括：选择单元52，设置为在频率资源占用信息指示不存在未占用的频率资源块时，选择具有第二频率资源的一个或多个邻区作为第一目标邻区，其中，第二频率资源为第一目标邻区的共享频率资源；第一发送单元54，设置为在第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，第一请求消息用于指示第一目标邻区释放第二频率资源；接收单元56与第一发送单元54耦合连接，设置为接收响应于第一请求消息的响应消息，其中，响应消息用于指示中心控制节点将第二频率资源作为指定小小区的第一频率资源；或，
第二发送单元58，设置为在第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，第二请求消息用于指示指定小小区与第一目标邻区共用第二频率资源。
图6是根据本发明实施例的小小区的频率资源的分配装置可选结构框图四，如图6所示，分配模块24包括：第二选择单元62，设置为在频率资源占用信息指示不存在未占用的频率资源块，且第一目标邻区的不具有第二频率资源时，从指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；第三发送单元64与第二选择单元 62耦合连接，设置为向中心控制节点发送第三请求消息，其中，第三请求消息用于请求指定小小区与第二目标邻区共用第二目标的频率资源，并将该频率资源作为指定小小区与第二目标邻区的第三频率资源，其中，第三频率资源为指定小小区与第二目标邻区独占的频率资源。
下面结合本发明的可选实施例对本发明进行举例说明。
本可选实施例以UDN为应用场景，提供了一种适用于UDN场景中小小区开启后频率资源预申请的方法，通过引入邻小区干扰、频率资源占用状况等因素对该小区频率资源申请的影响。
根据本可选实施例目的，提出在UDN中小小区基站需要能够接收由其他基站或中心控制节点发送来的邻区的开关状态信息及频率资源占用状况信息，以便刚开启的小小区做出更合理的频率资源申请。
本可选实施例的资源申请的方法可以通过如下步骤来实现：
步骤S202：在一个小小区由关状态转变为开状态时，向中心控制节点发送状态转换信息，该信息用以激活频率资源预申请操作。
步骤S204：小小区通过向邻站发送开关状态、频率资源占用信息反馈请求，或在中心控制节点收到该小区的状态转换信息后，将该区的邻区信息直接下发，以便刚开启的小区通过邻区信息决定申请使用的频率资源。
步骤S206：获取邻站的开关状态后，筛选出所有开状态的邻区，并对这些邻区进行RSRP(Reference Signal Receiving Power，参考信号接受功率)的测量。
步骤S208：该小小区的基站对所有开状态的邻站RSRP测量完成后，将测量结果由高至低排序，RSRP越高则意味着当两者使用同一频段时该小区会受到该邻区的干扰更强。
步骤S210：基站通过邻站反馈的频率资源占用信息判断是否有未占用的频率资源块，并根据判断结果进行频率资源申请。
步骤S212：如果存在未占用的频率资源块，则基站根据需求直接向中心控制节点申请占用相应大小的未使用频率资源，并将其作为该基站的第一频率资源。
步骤S214：如果不存在未占用的频率资源块，则根据上述排序中由高到低分别检测是否存在邻站使用第二频率资源。
其中，第一频率资源即是独占资源，以确保每个开启的小区能够保证最基本的数据业务，只有当两个相邻小区间干扰很低时且没有其他可用频率资源时才可同时作为这两个小区的第一频率资源进行复用；第二频率资源属于共享资源，在保证邻小区间干扰较低的情况下，可以存在多个小区使用以提高各自的服务质量。
步骤S216：如果存在邻站使用第二频率资源，则选择在排序中平均RSRP值较高的且拥有第二频率资源的邻站作为目标。同时设定RSRP阈值一，筛选出其余占用目标频段的邻站，当选出的邻站的RSRP测量值高于阈值一时，则微基站向中心控制节点发出请求释放目标邻站的第二频率资源及RSRP值高于阈值一的邻站的该段第二频率资源以作为自身的第一频率资源使用；否则，只向中心控制节点发送请求释放目标邻站的第二频率资源供自身使用。
步骤S218：当中心控制节点收到该站的请求后，向所有目标小区发送该段第二频率资源收回指示，以供该微小区作为第一频率资源使用。
步骤S220：如果不存在邻站使用第二频率资源，则选择在排序中RSRP值最低的邻站作为目标，该基站向MNB发出请求与目标基站复用同一块频率资源且该资源块分别为两基站的第一频率资源。
步骤S222：当小区由开状态转换为关状态时，则释放其所占用的频率资源并可供其他小区作为第一或第二频率资源使用。
下面结合附图和具体实施例对本可选实施例进行举例说明；
图7是根据本发明可选实施例的UDN网络中小小区分布结构示意图，如图7所示，在一个宏基站服务的区域内，有很多小小区的微基站服务的区域，且微基站有可能有不同的种类，比如说Pico、Small Cell、Micro、Femto等，可以统称为低功率发射基站LNB。
图8是根据本发明可选实施例的UDN中小小区开关状态示意图，如图8所示，由于在小小区高密度部署的情况下，往往有些小区处于低负载的情况，出于节约能源的考虑，某些低负载的小小区需要被关闭，这样就会产生如图8所示的小区开关现象。
本可选实施例中，Small Cell申请与分配频率资源的过程可以包括如下步骤：
步骤S302：当一个Small Cell由OFF状态转变为ON状态时，获取其邻站反馈开关状态信息及频带占用信息；
其中，上述获取相邻小区的开关状态、频率资源使用状况及对本区的干扰情况是为了能够更好的频率资源申请以减小相互之间的干扰；
此外，在频带占用信息中应包括：频率资源块占用情况、第一频率资源与第二频率资源的划分，以供刚开启的小区能够更方便、准确的申请更优的频率资源。其中，第一频率资源即是独占资源，以确保每个开启的小区能够保证最基本的数据业务，只有当两个相邻小区间干扰很低时且没有其他可用频率资源时才可同时作为这两个小区的第一频率资源进行复用；第二频率资源属于共享资源，在保证邻小区间干扰较低的情况下，可以存在多个小区使用以提高各自的服务质量。
步骤S304：小区通过对开状态的邻区RSRP接收值的排序及反馈回的频率资源占用状况综合考虑，当存在未占用频率资源时优先使用该频率资源块，以达到邻站间使用频率资源正交，排除干扰；当不存在未占用频率资源时，则根据邻区的第一、第二频率资源分配状况及RSRP排序来决定将要申请的频率资源。
以Small Cell获取邻站信息为例，对上述步骤S302以两个具体实施例的形式来说明。
实施例一：
当一个小区由OFF状态转变为ON状态时，将激活该小区的初始频率资源申请过程。在小区刚开启时，无法判定小区内各UE的位置，所以各UE收到其他小区的干扰情况无法断定，故应根据其他小区使用频率、RSRP等因素申请、分配资源来竭力避免其他小区对本小区内UE造成的干扰。
图9是根据本发明可选实施例的获取反馈开关状态信息及频带占用信息的方法流程图一，该方法的步骤包括：
步骤S902：小小区由OFF状态转变为ON状态，激活初始频率资源申请过程；
步骤S904：小小区向邻区发送开关状态、频率资源占用情况反馈请求；
步骤S906：邻区受到该反馈请求后，将自身的开关状态及频率资源占用信息通过广播信道发出；
步骤S908：刚开启的小小区在获取邻区的开关状态后，对所有处于开状态的邻区进行参考信号接收功率RSRP的测量，并将测量结果进行排序。
其中，在测量一个邻小区的RSRP值越大时，就说明该邻区对本小小区内UE的整体的干扰越大，故在频率资源申请时，应优先避免与RSRP较大的邻区使用相同的频率资源。
实施例二
图10是根据本发明可选实施例获取反馈开关状态信息及频带占用信息的方法流程图二，为本可选实施例步骤S302的另一种实现方式，该方法的步骤包括：
步骤S1002：小小区由OFF状态转变为ON状态，激活初始频率资源申请过程；
步骤S1004：小小区向Master TP发送邻区开关状态、频率资源占用情况信息反馈；
步骤S1006：Master TP受到该小区的请求后，根据该小小区坐标信息找出其邻区，并将其发送邻区的实时开关信息、频率资源占用信息；
步骤S1008：刚开启的小小区在获取邻区的开关状态后，对所有处于开状态的邻区进行参考信号接收功率RSRP的测量，并将测量结果进行排序。
图11是根据本发明可选实施例的频率资源的申请方法流程图，如图11所示，为本可选实施例的步骤S304的一种实现方法，该方法包括如下步骤：
步骤S1102：判断是否存在未被占用的频率资源；若存在未占用的频率资源，则跳执行步骤S1104；否则，执行步骤S1106。
步骤S1104：小小区可直接根据用户需求直接向中心控制节点申请相应大小的未占用频率资源块以供该小区内用户使用；之后执行步骤S1112；
步骤S1106：判断是否有使用第二频率的资源的相邻小区；当邻小区中有使用第二频率资源时，执行步骤S1108；否则执行步骤S1110；
也就是继续根据邻小区反馈的频率占用信息来分析各邻小区的第一、第二频率使用情况，以执行更优的频率资源申请；
步骤S1108：申请使用RSRP测量值排序最高且拥有第二频率资源的邻小区的第二频率资源，并将该部分频率资源回收；
其中，第二频率资源的特点是可能存在多个邻区共享使用，那么为了减小干扰，选择拥有第二频率资源且在上述RSRP排序中最高的邻区作为目标，同时，根据该第 二频率资源选出所有在用该段频率资源的邻区，将这些邻区的RSRP接收值与RSRP第一预设值做比较，将所有RSRP值大于第一预设值的邻区也作为目标小区，之后向中心控制节点申请占用该第二频率资源并收回所有目标小区的该段资源。
当收到该频率资源申请时，上层将收回目标邻区的第二频率资源并将其分配给申请使用的小小区。该步骤如此执行的原因在于第二频率资源属于共享资源，当该小区申请使用时，将干扰较大的小区的该段频率收回可以对其他邻区造成最小的干扰。
步骤S1110：向Master TP发出与RSRP排序中最低的小区进行频率资源复用请求；
其中，当所有邻区全部只有使用第一频率资源时，则选定在RSRP排序中最低的邻小区为目标，向中心控制节点申请复用该邻小区所使用的第一频率资源。通过这样的频率资源申请，在可以保证与其他邻小区所使用的频率资源正交的同时，还可以确保与复用频率的邻区之间的干扰最小。
步骤S1112：小区由ON状态转变为OFF状态，将占用的频率资源释放回资源池中，可供其他小区选择作为第一或第二频率资源使用。
实施例三
图12是根据本发明可选实施例小小区频率资源占用情况示意图，及RSRP排序示意图。从图12中可以看出，小区a刚开启的小小区基站，其周围拥有小区b，c，d，e，f。根据本专利的实施方法，a开启后向中心控制节点发送获取邻区信息的请求；中心控制节点收到该请求后根据a的坐标信息找出其所有邻小区b，c，d，e，f，并根据这些小小区节点的上报信息得到这些小区的开关信息及频率资源占用信息，之后将这些信息发送给小小区a。在a得到反馈信息a后得知其开启的相邻小小区为b，c，d，e，f，通过测量得到这些小区的RSRP排序为小区c，f，e，b，d。
此时，再根据得到的各邻小区的频率资源占用信息，可知频率所有频率资源均被占用，且知这些邻小区中某些拥有第二频率资源，按照上述实施步骤后，基站a将申请将f基站的第二频率块6作为自身的第一频率资源并请求小小区f及小小区b释放该块频率资源，如表1所示：
Figure PCTCN2015079314-appb-000001
Figure PCTCN2015079314-appb-000002
表1
表2为经过上述调整后小小区a-小小区f的频率资源块占用情况，如表2所示：
小区ID 频率资源块占用情况
a 6
b 12
c 4
d 5，3
e 1，3
f 4
表2
在本可选实施例中，基于小区开关方式当一个小小区开启时，将触发对邻小区开关状态、频率资源占用情况的请求消息，及小区对邻区的参考信号接收功率值测量；在获得相邻区的干扰等级、及频率资源占用情况后，该小小区进行综合考量并申请最优的频率资源进行使用，通过本可选实施例小小区可以获得对相邻区干扰最小的频率资源，进而可以提升整个网络性能。
上仅为本发明的可选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，通过上述实施例及优选实施方式，采用在指定小小区由关闭状态转换为开启状态时，依据与该指定小小区对应的邻区的指定信息分配该指定小小区的频率资源的方式，解决了相关技术超密集网络中当小小区大量部署时，小小区之间的干扰很强导致网络整体性能下降的问题，提高了小小区的资源利用率，进而提升了网络的整体性能。

Claims (11)

  1. 一种小小区频率资源的分配方法，包括：
    在指定小小区由关闭状态转换为开启状态时，获取与所述指定小小区对应的邻区的指定信息，其中，所述指定信息用于反映各个所述邻区对所述指定小小区的干扰情况；
    依据所述指定信息分配所述指定小小区的频率资源。
  2. 根据权利要求1所述的方法，其中，获取与所述指定小小区对应的邻区的指定信息包括：
    获取用于指示所述邻区开关状态的信息；
    获取所述指定小小区相对于每一个处于开启状态的所述邻区的RSRP值；
    获取处于开启状态的所有所述邻区的频率资源占用情况的信息。
  3. 根据权利要求2所述的方法，其中，依据所述指定信息分配所述指定小小区的频率资源包括：
    在所述频率资源占用信息指示存在未占用的所述频率资源块时，将未占用的所述频率资源块作为所述指定小小区的第一频率资源，其中，所述第一频率资源为所述指定小小区的独占频率资源。
  4. 根据权利要求3所述的方法，其中，依据所述指定信息分配所述指定小小区的频率资源包括：
    在所述频率资源占用信息指示不存在未占用的所述频率资源块时，选择具有第二频率资源的一个或多个邻区确定为第一目标邻区，其中，所述第二频率资源为所述第一目标邻区的共享频率资源；
    在所述第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，所述第一请求消息用于指示所述第一目标邻区释放所述第二频率资源；并接收响应于所述第一请求消息的响应消息，其中，所述响应消息用于指示所述中心控制节点将所述第二频率资源作为所述指定小小区的所述第一频率资源；或，
    在所述第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，所述第二请求消息用于指示所述指定小小区与所述第一目标邻区共用所述第二频率资源。
  5. 根据权利要求4所述的方法，其中，依据所述指定信息分配所述指定小小区的频率资源包括：
    在所述频率资源占用信息指示不存在未占用的所述频率资源块，且所述第一目标邻区的不具有所述第二频率资源时，从所述指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；
    向所述中心控制节点发送第三请求消息，其中，所述第三请求消息用于请求所述指定小小区与所述第二目标邻区共用所述第二目标的频率资源，并将该频率资源作为所述指定小小区与所述第二目标邻区的第三频率资源，其中，所述第三频率资源为所述指定小小区与所述第二目标邻区独占的频率资源。
  6. 根据权利要求1至5任一项所述的方法，其中，所述方法还包括：
    在所述指定小小区由开启状态转换为关闭状态时，释放所述指定小小区占用的频率资源。
  7. 一种小小区频率资源的分配装置，包括：
    获取模块，设置为在指定小小区由关闭状态转换为开启状态时，获取与所述指定小小区对应的邻区的指定信息，其中，所述指定信息用于反映各个所述邻区对所述指定小小区的干扰情况；
    分配模块，设置为依据所述指定信息分配所述指定小小区的频率资源。
  8. 根据权利要求7所述的装置，其中，所述获取模块包括：
    第一获取单元，设置为获取用于指示所述邻区开关状态的信息；
    第二获取单元，设置为获取所述指定小小区相对于每一个处于开启状态的所述邻区的RSRP值；
    第三获取单元，设置为获取处于开启状态的所有所述邻区的频率资源占用情况的信息。
  9. 根据权利要求8所述的装置，其中，所述分配模块包括：
    确定单元，设置为在所述频率资源占用信息指示存在未占用的所述频率资源块时，将未占用的所述频率资源块确定为所述指定小小区的第一频率资源，其中，所述第一频率资源为所述指定小小区的独占频率资源。
  10. 根据权利要求9所述的装置，其中，所述分配模块包括：
    选择单元，设置为在所述频率资源占用信息指示不存在未占用的所述频率资源块时，选择具有第二频率资源的一个或多个邻区作为第一目标邻区，其中，所述第二频率资源为所述第一目标邻区的共享频率资源；
    第一发送单元，设置为在所述第一目标邻区中全部邻区的RSRP值高于预定阈值时，向中心控制节点发送第一请求消息，其中，所述第一请求消息用于指示所述第一目标邻区释放所述第二频率资源；
    接收单元，设置为接收响应于所述第一请求消息的响应消息，其中，所述响应消息用于指示所述中心控制节点将所述第二频率资源作为所述指定小小区的所述第一频率资源；或，
    第二发送单元，设置为在所述第一目标邻区中部分邻区的RSRP值高于预定阈值时，向中心控制节点发送第二请求消息，其中，所述第二请求消息用于指示所述指定小小区与所述第一目标邻区共用所述第二频率资源。
  11. 根据权利要求10所述的装置，其中，所述分配模块包括：
    第二选择单元，设置为在所述频率资源占用信息指示不存在未占用的所述频率资源块，且所述第一目标邻区的不具有所述第二频率资源时，从所述指定小小区的邻区中选择RSRP值最低的邻区作为第二目标邻区；
    第三发送单元，设置为向所述中心控制节点发送第三请求消息，其中，所述第三请求消息用于请求所述指定小小区与所述第二目标邻区共用所述第二目标的频率资源，并将该频率资源作为所述指定小小区与所述第二目标邻区的第三频率资源，其中，所述第三频率资源为所述指定小小区与所述第二目标邻区独占的频率资源。
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