WO2016197773A1 - 一种频率资源分配方法及装置 - Google Patents

一种频率资源分配方法及装置 Download PDF

Info

Publication number
WO2016197773A1
WO2016197773A1 PCT/CN2016/081456 CN2016081456W WO2016197773A1 WO 2016197773 A1 WO2016197773 A1 WO 2016197773A1 CN 2016081456 W CN2016081456 W CN 2016081456W WO 2016197773 A1 WO2016197773 A1 WO 2016197773A1
Authority
WO
WIPO (PCT)
Prior art keywords
small cell
frequency resource
allocated
band
edge
Prior art date
Application number
PCT/CN2016/081456
Other languages
English (en)
French (fr)
Inventor
段江海
Original Assignee
大唐移动通信设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Publication of WO2016197773A1 publication Critical patent/WO2016197773A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a frequency resource allocation method and apparatus.
  • AFR Adaptive Frequency Reuse
  • the method for establishing the interference list is: after the Small Cell is powered on, the reference signal strength of the other Small Cell is measured by using a network snoop function, and if the reference signal strength exceeds a preset threshold, the Small Cell is added. In the interference list.
  • Step 1 assigning an orthogonal sub-band to the mutually interfered Small Cell
  • Step 2 sequentially assign a plurality of orthogonal sub-bands to the Small Cell, and ensure that the sub-bands allocated to the Small Cell having the interference relationship are orthogonal to each other;
  • Step 3 By limiting the interference level of the adjacent Small Cell on the same frequency band resource, the adjacent Small Cell conditionally re-uses the same sub-band, thereby increasing the system band utilization rate and reducing the intra-band interference value. Get a compromise.
  • step 3 for each non-orthogonal sub-band, the Small Cell needs to evaluate its effect on the signal-to-noise ratio of the received signal of the Small Cell and the Small Cell in its interference list if it is used as a multiplex sub-band.
  • the noise ratio is within the permissible threshold and is considered to be the multiplex subband of the Small Cell.
  • the frequency resource multiplexing request and response (permission or rejection) is implemented by an interaction process between the Small Cells.
  • the AFR scheme adopts a distributed architecture, and each Small Cell needs to interact with an adjacent Small Cell. Therefore, when the number of Small Cells is large, the interaction between the Small Cells is very frequent, and the transmission overhead is large. .
  • the number of sub-bands that the Small Cell can reuse is only related to the quality of the wireless signal, and does not necessarily match its own load or resource usage requirements.
  • the Small Cell needs to send a request message to each neighboring Small Cell, and the frequency multiplexing can be performed only after receiving the multiplexing permission of each Small Cell. In this way, not only is the time extended, but the success rate is low. The more the number of adjacent Small Cells, the more prominent the problem.
  • a Small Cell receives a frequency resource multiplexing request message sent by an adjacent Small Cell, which is complicated to implement and has poor performance.
  • each Small Cell forms a respective interference list. Due to the influence of measurement fluctuations, part of the information content of the list may be unidirectional, that is, the two Small Cells do not interfere with each other and cannot truly reflect the actual interference situation.
  • each Small Cell itself determines the frequency resources that need to be occupied, and each maintains its own list of interfering cells, so there is interference between adjacent Small cells. Bigger problem.
  • the embodiment of the invention provides a method and a device for allocating frequency resources, which are used to effectively reduce interference between small cells in a scenario of dense cell intensive network.
  • the centralized controller determines that the frequency resource needs to be allocated for the small cell under the control of the centralized controller, the small cell of the small cell to which the frequency resource to be allocated is controlled by the centralized controller is determined, and according to the current small cell of the interference The occupied frequency resource allocates a frequency resource to the small cell to which the frequency resource is to be allocated;
  • the centralized controller notifies the small cell to which the frequency resource to be allocated is allocated to the small cell to which the frequency resource to be allocated is allocated.
  • the available frequency resources are divided into a central frequency band and an edge frequency band in advance, wherein the edge frequency band includes a plurality of edge sub-bands.
  • the centralized controller determines that a frequency resource needs to be allocated for a small cell under the control of the centralized controller by: receiving an initial frequency resource allocation request sent by the small cell under the control of the centralized controller, determining The initial frequency resource needs to be allocated to the small cell;
  • the centralized controller allocates frequency resources for the small cell to be allocated the frequency resource according to the small cell of the small cell to which the frequency resource to be allocated is controlled by the centralized controller, and the frequency resource currently occupied by the small cell.
  • the method includes: the small-cell interference small cell of the small cell that is to be allocated by the centralized controller according to the centralized controller, and the frequency resource currently occupied by the interference small cell, which is a small frequency resource to be allocated.
  • the cell allocates one or more edge sub-bands;
  • the method includes: assigning the central frequency band and the small cell for the frequency resource to be allocated The information of the edge sub-band is notified to the small cell of the frequency resource to be allocated.
  • the method further includes: the centralized controller periodically acquiring the frequency resource to be allocated The frequency resource requirement information reported by the small cell.
  • the method further includes: determining, by the centralized controller, the edge subband of the small cell that needs to be allocated to the frequency resource to be allocated according to the frequency resource usage information reported by the small cell to which the frequency resource is to be allocated. And the number of edge sub-bands that need to be recovered, and according to the frequency resource currently occupied by the small cell of the small cell of the to-be-allocated frequency resource, and the number of edge sub-bands that need to be recovered, the recovery is allocated to the to-be-distributed The edge subband of the small cell of the frequency resource.
  • the centralized controller recovers the frequency resources that are currently allocated to the to-be-allocated frequency resource according to the frequency resource currently occupied by the small cell of the small cell to which the frequency resource is to be allocated, and the number of edge sub-bands that need to be recovered.
  • the edge subband of the small cell specifically includes:
  • Edge sub-band Determining, by the centralized controller, an edge sub-band currently occupied by a small cell of the small cell to which the frequency resource to be allocated is currently occupied, and counting, for each edge sub-band in the edge sub-band, a small cell occupying the edge sub-band Counting the edge sub-bands according to the order of the number from the largest to the smallest, and sequentially recovering the small cells allocated to the frequency resource to be allocated according to the sorting result and the number of edge sub-bands to be recovered Edge subband.
  • the method further includes: the centralized controller determines, according to the frequency resource requirement information reported by the small cell of the to-be-allocated frequency resource, that a new edge sub-band needs to be allocated for the small cell and that the frequency to be allocated needs to be allocated
  • the small cell of the resource allocates a new number of edge sub-bands, and allocates a new edge according to the current frequency resource currently occupied by the small cell of the small cell of the to-be-allocated frequency resource, and the small cell that needs to allocate the frequency resource to be allocated.
  • the number of sub-bands is used to allocate an edge sub-band to the small cell to which the frequency resource is to be allocated.
  • the centralized controller allocates a new edge sub-band according to a current frequency resource currently occupied by the small cell of the small cell to which the frequency resource to be allocated is allocated, and a small cell that needs to allocate the frequency resource to be allocated.
  • Allocating an edge sub-band to the small cell to be allocated the frequency resource includes:
  • the number of small cells in the edge subband is sorted according to the order of the number from small to large, and the new sub-bands are allocated according to the sorting result and the small cells that need to allocate the frequency resources to be allocated. Number, the edge sub-band is allocated again for the small cell to which the frequency resource is to be allocated.
  • the interference small cell of the small cell that determines the frequency resource to be allocated under the control of the centralized controller and the frequency resource currently occupied by the interference small cell include: the centralized controller according to the centralized controller Determining, by the self-maintained small cell interference matrix relationship table, the interference small cell of the small cell that determines the frequency resource to be allocated under the control of the centralized controller, and the frequency resource currently occupied by the interference small cell, including: a small cell Interference small cell, wherein the small cell interference matrix relationship table includes a correspondence relationship between small cells that interfere with each other;
  • the centralized controller determines, according to the small cell frequency resource allocation table maintained by the centralized controller, the frequency resource currently occupied by the interference small cell, where the small cell frequency resource allocation table includes the current occupied by each small cell. Information about frequency resources.
  • a first unit configured to determine, when the frequency resource needs to be allocated to the small cell under the control of the centralized controller, the small cell of the small cell of the to-be-allocated frequency resource controlled by the centralized controller, and according to the interference a frequency resource currently occupied by the cell, and a frequency resource is allocated to the small cell to which the frequency resource is to be allocated;
  • a second unit configured to notify, to the small cell of the frequency resource to be allocated, a frequency resource allocated to the small cell to which the frequency resource to be allocated is allocated.
  • the first unit is further configured to: divide the available frequency resources into a central frequency band and an edge frequency band in advance, wherein the edge frequency band includes a plurality of edge sub-bands.
  • the first unit determines that a frequency resource needs to be allocated for a small cell under the control of the centralized controller by: receiving an initial frequency resource allocation request sent by the small cell under the control of the centralized controller, determining The initial frequency resource needs to be allocated to the small cell;
  • the first unit is specifically configured to: according to the small cell of the small cell that is to be allocated according to the centralized controller, and the frequency resource currently occupied by the small cell, the small frequency resource to be allocated The cell allocates one or more edge sub-bands;
  • the second unit is specifically configured to: notify the center frequency band and the information about the edge sub-band allocated to the small cell to be allocated the frequency resource to the small cell to be allocated the frequency resource.
  • the first unit is further configured to: periodically acquire frequency resource requirement information reported by the small cell of the frequency resource to be allocated.
  • the first unit is further configured to: determine, according to the frequency resource usage information reported by the small cell of the to-be-allocated frequency resource, that an edge sub-band of the small cell that has been allocated to the to-be-allocated frequency resource needs to be recovered, and The number of edge sub-bands to be reclaimed, and according to the frequency resource currently occupied by the small cell of the small cell of the to-be-allocated frequency resource, and the number of edge sub-bands that need to be recovered, the reclaimed frequency allocated to the to-be-assigned frequency The edge subband of the small cell of the resource.
  • the first unit is specifically configured to: determine an edge sub-band currently occupied by the current small cell of the small cell of the to-be-assigned frequency resource, and collect statistics for each edge sub-band in the edge sub-band
  • the number of small cells in the edge sub-band is sorted according to the order of the number from the largest to the smallest, and the number of edge sub-bands to be recovered is sequentially allocated according to the sorting result, and the number of the sub-bands to be recovered is sequentially allocated.
  • the edge sub-band of the small cell to which the frequency resource is to be allocated is specifically configured to: determine an edge sub-band currently occupied by the current small cell of the small cell of the to-be-assigned frequency resource, and collect statistics for each edge sub-band in the edge sub-band
  • the number of small cells in the edge sub-band is sorted according to the order of the number from the largest to the smallest, and the number of edge sub-bands to be recovered is sequentially allocated according to the sorting result, and the number of the sub
  • the first unit is further configured to: determine, according to the frequency resource requirement information reported by the small cell to be allocated the frequency resource, a new edge sub-band to be allocated to the small cell to be allocated the frequency resource, and The small cell to which the frequency resource to be allocated allocates the number of new edge sub-bands, and according to the frequency resource currently occupied by the small cell currently in the small cell of the to-be-assigned frequency resource, and the small cell that needs to be the frequency resource to be allocated The number of new edge sub-bands is allocated, and the edge sub-band is allocated again for the small cell to which the frequency resource is to be allocated.
  • the first unit is specifically configured to: determine an edge sub-band currently occupied by a small inter-cell of the small cell of the to-be-assigned frequency resource, and occupy the edge sub-band for each edge sub-band of the edge sub-band.
  • the number of small cells in the edge sub-band is sorted according to the order of the number from small to large, and the new sub-bands are allocated according to the sorting result and the small cell that needs to allocate the frequency resource to be allocated. Number, the edge sub-band is allocated again for the small cell to which the frequency resource is to be allocated.
  • the first unit is specifically configured to: according to the small cell maintained by the centralized controller itself Interference matrix relationship table, determining an interference small cell of the small cell of the frequency resource to be allocated, wherein the small cell interference matrix relationship table includes a correspondence relationship between small cells that interfere with each other; according to the small maintenance of the centralized controller itself
  • the cell frequency resource allocation table determines the frequency resource currently occupied by the interference small cell, where the small cell frequency resource allocation table includes information about the frequency resource currently occupied by each small cell.
  • the embodiment of the invention further provides a frequency resource allocation device, comprising: a processor, a memory and a transceiver;
  • the transceiver is configured to receive and transmit data under control of a processor
  • the memory is used to store data used by the processor to perform operations
  • the processor is configured to read a program in the memory and perform the following process:
  • the small cell of the small cell to which the frequency resource to be allocated is controlled by the centralized controller is determined, and according to the frequency resource currently occupied by the small cell Allocating frequency resources for the small cell to which the frequency resource is to be allocated;
  • the frequency resource allocated to the small cell to which the frequency resource is to be allocated is notified to the small cell to which the frequency resource is to be allocated.
  • the centralized controller when determining that the frequency resource needs to be allocated to the small cell under the control of the centralized controller, determines the small cell of the small cell maintained by the centralized controller, and is small according to the interference.
  • the frequency resource currently occupied by the cell is allocated a frequency resource for the small cell; the centralized controller notifies the small cell of the frequency resource allocated to the small cell, so that the centralized cell is in the same frequency band network scenario.
  • the architecture does not require reliable transmission and interaction between the Small Cell. In particular, when the number of Small Cells is large, the transmission overhead can be effectively reduced.
  • the centralized controller uniformly maintains the Small Cell interference relationship, it truly reflects the actual relationship between the Small Cells. Interference, so it can effectively reduce the interference between the Small Cell.
  • FIG. 1 is a schematic diagram of a centralized control architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a relationship of a Small Cell interference matrix according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of frequency resource division according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a frequency resource management method according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a frequency resource recovery method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a method for reallocating a frequency resource according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a frequency resource management method according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a frequency resource management apparatus according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a frequency resource allocation apparatus according to an embodiment of the present invention.
  • the embodiment of the invention provides a method and a device for allocating a frequency resource, which is applicable to a scenario of a dense cell in the same frequency group, which can effectively reduce the interference between the Small cells.
  • the embodiment of the invention is based on a centralized architecture, as shown in FIG.
  • M Small Cells are connected to a centralized controller.
  • the centralized controller is a logical functional entity, and may be an independent physical device, or may be combined with other physical devices, for example, may be combined with any server on the network side.
  • the centralized controller allocates frequency resources to each of the Small cells connected thereto. Specifically, in the power-on phase of the Small Cell, the centralized controller allocates initial frequency resources for the Small Cell; in the Small Cell working phase, the centralized controller combines the current resource usage requirements and load conditions of the Small Cell and the interference situation of the adjacent Small Cell. , update the frequency resources that the Small Cell can use. Throughout the process, the frequency resources that the Small Cell can use are completely controlled by the centralized controller. At the same time, the centralized controller needs to maintain two tables in real time: the Small Cell interference matrix relation table and the Small Cell frequency resource allocation table.
  • the Small Cell interference matrix relationship table is determined by the network interception and reporting of the Small Cell, and the processing of the reported content by the centralized controller. Specifically, the period after the Small Cell is powered on Actively listen to the cell signal of the neighboring base station, measure the reference signal received power (RSRP) of the adjacent Small Cell, and report it to the centralized controller. The centralized controller processes the reported information of the Small Cell to generate a Small Cell interference matrix relationship table.
  • RSRP reference signal received power
  • a simple processing method may be that if the RSRP measurement value of the Small Cell to the adjacent Small Cell is greater than a preset threshold, it is considered that there is interference, otherwise, no interference is considered.
  • the present invention does not limit the specific judgment criteria.
  • Small Cell1 has interference relationship with Small Cell2 and Small Cell3; Small Cell2 only has interference relationship with Small Cell1; Small Cell3 has interference relationship with Small Cell1, Small Cell M, and the like.
  • the Small Cell frequency resource allocation table records the allocated frequency resources of each Small Cell under the jurisdiction of the centralized controller.
  • the system band resource is divided into a central band (Band-Center, BC) and an edge band (Band-Edge, BE), and the edge band BE is further divided into N sub-bands, and the N sub-band resources are divided into N sub-band resources. Orthogonal to each other.
  • the size of the central band BC can be configured by the Operations & Maintenance (O&M) entity.
  • the central user equipment preferentially uses the central frequency band resource. When the central frequency band resource is insufficient, the edge sub-band resource can be used; the edge user equipment can only use the edge sub-band resource.
  • all the small cells share the central frequency band resources, and different small cells occupy the same or different edge sub-bands, and the mutually interfered Small cells use different edge sub-bands as much as possible, and the current resource usage requirements and load are small.
  • the Small Cell uses as few edge subbands as possible.
  • the centralized controller combines the load condition of the Small Cell and the interference situation of the adjacent Small Cell to dynamically adjust the number and position of the available edge sub-bands of each Small Cell under its jurisdiction to reduce the interference between the Small Cells and complete the edge of the Small Cell. Subband allocation process.
  • Step 1 After completing the power-on startup and the listening report, the Small Cell requests the centralized controller to allocate the initial frequency resource.
  • Step 2 The centralized controller allocates one or more edge subbands to the Small Cell requesting the allocation of the initial frequency resource according to the updated Small Cell interference matrix relationship table.
  • Step 3 The centralized controller responds to the Small Cell response resource allocation result, including the central frequency band, and one or more edge sub-bands; after that, the Small Cell enters the working phase according to the resource allocation result sent by the centralized controller.
  • the subsequent centralized controller adjusts the allocated frequency resources for the Small Cell, it is not necessary to transmit the information of the central frequency band, and only needs to notify the information of the Small Cell edge sub-band, because the central frequency band resources shared by all Small cells are If it is set in advance, if the subsequent adjustment is made, the central band resource information after the update is notified.
  • Step 4 The centralized controller updates the Small Cell frequency resource allocation table.
  • Step 5 During the working phase, the Small Cell periodically performs resource usage statistics and reports it to the centralized controller.
  • Step 6 The centralized controller decides whether to allocate a new edge sub-band to the Small Cell or to reclaim the allocated edge sub-band; if the edge sub-band needs to be allocated or recovered, the centralized controller reports according to the statistics of the Small Cell and combines the maintenance of the self.
  • the interference matrix relationship and the frequency resource allocation table determine the number of locations and their locations that need to be allocated or recovered.
  • Step 7 If the edge sub-band needs to be allocated or reclaimed, the centralized controller sends a frequency resource update indication message to the Small Cell to indicate its new available edge sub-band information, and the Small Cell performs the user equipment according to the resource allocation result of the centralized controller (User Equipment, UE) resource allocation.
  • the centralized controller User Equipment, UE
  • Step 8 If the edge subband needs to be allocated or reclaimed, the centralized controller updates the Small Cell frequency resource allocation table.
  • Steps 7 and 8 above are optional steps.
  • step 7 includes, for example:
  • Step 1 The centralized controller starts the timer, and uniformly processes the reported message of the Small Cell received during the running of the timer; the timing of the timer is configured by O&M, the duration The setting depends on the transmission delay between the Small Cell and the centralized controller.
  • Step 2 The message reported by the Small Cell carries the current resource usage requirement and load of the Small Cell, including the number of accepted UEs, the number of edge UEs, and the physical resource block (PRB) resource requirements.
  • the specific content is not limited.
  • the centralized controller determines whether the edge subband and the corresponding number of edge subbands need to be allocated or recovered for each Small Cell according to the current resource usage requirement and load condition reported by the Small Cell and the edge subband condition allocated for the Small Cell.
  • the preset resource usage requirement thresholds are the first threshold TH1 and the second threshold TH2, TH1 ⁇ TH2, respectively.
  • the number of edge subbands required for different resource usage requirements is different.
  • A1-B is equal to zero, it is determined that The Small Cell redistributes or reclaims the edge sub-band. If A1-B is less than zero, it is determined that it is necessary to recover the absolute edge sub-bands of A1-B that have been allocated for the Small Cell. TH1 ⁇ T ⁇ TH2, and the case of T ⁇ TH2 are the same, and will not be described again.
  • the determination of the resource usage may also be in other ways, which is not limited in the embodiment of the present invention.
  • M M1 + M2 + M3.
  • Step 3 Assume that when it is determined that the edge sub-band resource recovery needs to be performed on the M1 small cells, referring to FIG. 5, the edge sub-band resource recovery processing is performed on the M1 Small cells by using the following steps:
  • S503. Determine, according to the maintained Small Cell frequency resource allocation table, an edge subband allocated to each Small Cell in the L1 Small Cells, and in the allocated edge subbands. Each edge sub-band is counted, and how many Small Celles are occupied by each edge sub-band is counted, and the allocated edge sub-bands are sorted according to the statistical result from the largest to the smallest, and the allocated edge sub-bands are obtained. Sort results.
  • the first Small Cell has 10 interfering Small cells
  • the edge sub-band occupied by the 10 interfering Small Cell is determined according to the Small Cell frequency resource allocation table, for example, there are three edge sub-bands, wherein the first edge sub-band is 10
  • the 6 small cell sub-bands are occupied by 8 small cells in the 10 interfering Small cells
  • the third edge sub-band is the 3 small cells in the 10 interfering Small cells.
  • the result of the sorting is a second edge sub-band, a first edge sub-band, and a third edge sub-band. If the first Small Cell needs to release an edge sub-band resource, releasing the second edge sub-band resource, if the first Small Cell needs to release two edge sub-band resources, releasing the second edge sub-band and the first edge sub-band Resources.
  • S504. Determine, according to the table shown in step 2, the number of edge sub-bands to be released, and sequentially select the edge sub-bands with the highest ranking among the sorting results for release.
  • the centralized controller sends a frequency resource update indication message to the Small Cell, indicating the available edge subband information, where the information of the edge subband that has been released is not included.
  • step S508 Determine whether m is less than or equal to M1. If yes, go to step S502, otherwise, end.
  • Step 4 Assume that when it is determined that there are M2 Small Celles to be allocated the edge sub-bands, referring to FIG. 6, the M2 Small Cells are subjected to the following steps for reallocation of the edge sub-band resources:
  • Edge subband allocation that is, determining the edge subband occupied by the L2 Small Cell, counting each edge subband in the edge subband occupied by the L2 Small Cell, and counting how many edge subbands are used
  • the Small Cell is occupied, and the edge sub-bands occupied by the L2 Small Cell are sorted according to the statistical result from small to large, and the sort result is obtained.
  • the edge subbands are allocated; wherein the number of edge subbands that need to be reallocated for the Small Cell is determined by step 2.
  • the second Small Cell has 10 interfering Small cells
  • the edge subbands occupied by the 10 interfering Small Cell are determined according to the Small Cell frequency resource allocation table, for example, there are three edge subbands, wherein the first edge subband is 10
  • the 6 small cell sub-bands are occupied by 8 small cells in the 10 interfering Small cells
  • the third edge sub-band is the 3 small cells in the 10 interfering Small cells. If occupied, the result of the sorting is a third edge sub-band, a first edge sub-band, and a second edge sub-band. If the second Small Cell needs to allocate another edge sub-band resource, the third edge sub-band resource is allocated, and if the second Small Cell needs to allocate two edge sub-band resources, the third edge sub-band and the first edge are allocated. Band resources.
  • the centralized controller sends a frequency resource update indication message to the Small Cell, indicating the available edge subband information, including edge subband information redistributed for the Small Cell.
  • a frequency resource allocation method includes:
  • the centralized controller determines, when the frequency resource needs to be allocated to the small cell under the control of the centralized controller, the small cell of the small cell that is to be allocated the frequency resource under the control of the centralized controller, and is small according to the interference.
  • the frequency resource currently occupied by the cell, and the frequency resource is allocated to the small cell;
  • the centralized controller allocates frequency resources for the small cell to which the frequency resource is to be allocated. Notifying the small cell of the frequency resource to be allocated.
  • the available frequency resources are divided into a central frequency band and an edge frequency band in advance, wherein the edge frequency band includes a plurality of edge sub-bands.
  • the centralized controller determines that a frequency resource needs to be allocated for a small cell under the control of the centralized controller by: receiving an initial frequency resource allocation request sent by the small cell under the control of the centralized controller, determining The initial frequency resource needs to be allocated for the small cell.
  • the centralized controller allocates frequency resources for the small cell to be allocated the frequency resource according to the small cell of the small cell to which the frequency resource to be allocated is controlled by the centralized controller, and the frequency resource currently occupied by the small cell.
  • the method includes: the small-cell interference small cell of the small cell that is to be allocated by the centralized controller according to the centralized controller, and the frequency resource currently occupied by the interference small cell, which is a small frequency resource to be allocated.
  • the cell allocates one or more edge subbands.
  • the method includes: assigning the central frequency band and the small cell for the frequency resource to be allocated The information of the edge sub-band is notified to the small cell of the frequency resource to be allocated.
  • the method further includes: the centralized controller periodically acquiring the frequency resource requirement information reported by the small cell to be allocated the frequency resource.
  • the method further includes: determining, by the centralized controller, the edge subband of the small cell that needs to be allocated to the frequency resource to be allocated according to the frequency resource usage information reported by the small cell to which the frequency resource is to be allocated. And the number of edge sub-bands that need to be recovered, and according to the frequency resource currently occupied by the small cell of the small cell of the to-be-allocated frequency resource, and the number of edge sub-bands that need to be recovered, the recovery is allocated to the to-be-distributed The edge subband of the small cell of the frequency resource.
  • the centralized controller recovers the frequency resources that are currently allocated to the to-be-allocated frequency resource according to the frequency resource currently occupied by the small cell of the small cell to which the frequency resource is to be allocated, and the number of edge sub-bands that need to be recovered.
  • the edge subband of the small cell specifically includes:
  • an edge sub-band currently occupied by a small cell of the small cell to which the frequency resource to be allocated is currently occupied including at least one edge sub-band, and in most cases may occupy multiple edge sub-bands
  • Each edge sub-band of the edge sub-band counts the number of small cells occupying the edge sub-band, and sorts the currently occupied edge sub-band according to the order of the number, according to the sorting result, and The number of edge sub-bands that need to be recovered, and the edge sub-bands of the small cells that have been allocated to the frequency resource to be allocated are sequentially recovered.
  • the method further includes: the centralized controller determining, according to the frequency resource requirement information reported by the small cell of the to-be-assigned frequency resource, that a new edge sub-band needs to be allocated for the small cell to be allocated the frequency resource, and Assigning a number of new edge sub-bands to the small cell to which the frequency resource is to be allocated, and according to the frequency resource currently occupied by the small cell currently in the small cell of the to-be-assigned frequency resource, and the small frequency resource to be allocated The cell allocates a new number of edge subbands, and allocates an edge subband to the small cell to which the frequency resource is to be allocated.
  • the centralized controller allocates a new edge sub-band according to a current frequency resource currently occupied by the small cell of the small cell to which the frequency resource to be allocated is allocated, and a small cell that needs to allocate the frequency resource to be allocated.
  • Allocating an edge sub-band to the small cell to be allocated the frequency resource includes:
  • an edge sub-band currently occupied by a small cell of the small cell to which the frequency resource to be allocated is currently occupied (including at least one edge sub-band, and in most cases may occupy multiple edge sub-bands), and for the current occupation
  • Each edge sub-band of the edge sub-band counts the number of small cells occupying the edge sub-band, and sorts the currently occupied edge sub-band according to the order of the number from small to large, according to the sorting result, and the need Allocating a new number of edge sub-bands to the small cell to which the frequency resource is to be allocated, and allocating the edge sub-band to the small cell to which the frequency resource is to be allocated.
  • the centralized controller determines, according to the small cell interference matrix relationship table maintained by the centralized controller, an interference small cell of the small cell to which the frequency resource is to be allocated, where the small cell interference matrix relationship table includes each other.
  • the centralized controller determines the current occupation of the small cell according to the small cell frequency resource allocation table maintained by the centralized controller itself
  • the frequency resource used, wherein the small cell frequency resource allocation table includes information about frequency resources currently occupied by each small cell.
  • a frequency resource allocation apparatus includes:
  • the first unit 11 is configured to: when it is determined that the frequency resource needs to be allocated to the small cell under the control of the centralized controller, determine the small cell of the small cell of the to-be-allocated frequency resource under the control of the centralized controller, and according to the interference a frequency resource currently occupied by the small cell, and a frequency resource is allocated to the small cell to which the frequency resource is to be allocated;
  • the second unit 12 is configured to notify, to the small cell of the frequency resource to be allocated, the frequency resource allocated for the small cell to which the frequency resource to be allocated.
  • the first unit divides the available frequency resources into a central frequency band and an edge frequency band, wherein the edge frequency band includes a plurality of edge sub-bands.
  • the first unit determines that a frequency resource needs to be allocated for a small cell under the control of the centralized controller by: receiving an initial frequency resource allocation request sent by the small cell under the control of the centralized controller, determining The initial frequency resource needs to be allocated for the small cell.
  • the first unit allocates one or a small cell to the frequency resource to be allocated according to the interference small cell of the small cell to which the frequency resource to be allocated is controlled by the centralized controller, and the frequency resource currently occupied by the interference small cell. Multiple edge subbands.
  • the second unit is specifically configured to: notify the center frequency band and the information about the edge sub-band allocated to the small cell to be allocated the frequency resource to the small cell to be allocated the frequency resource.
  • the first unit is further configured to: periodically acquire frequency resource requirement information reported by the small cell to be allocated the frequency resource.
  • the first unit is further configured to: determine, according to the frequency resource usage information reported by the small cell of the to-be-allocated frequency resource, that an edge sub-band of the small cell that has been allocated to the to-be-allocated frequency resource needs to be recovered, and The number of edge sub-bands to be reclaimed, and according to the frequency resource currently occupied by the small cell of the small cell of the to-be-allocated frequency resource, and the number of edge sub-bands that need to be recovered, the reclaimed frequency allocated to the to-be-assigned frequency The edge subband of the small cell of the resource.
  • the first unit determines an edge sub-band currently occupied by the current small cell of the small cell to which the frequency resource to be allocated is occupied, and statistically occupies the edge sub-band for each edge sub-band in the edge sub-band
  • the number of small cells is sorted according to the order of the number from the largest to the smallest, and the frequency allocated to the to-be-assigned frequency is sequentially recovered according to the sorting result and the number of edge sub-bands to be recovered.
  • the edge subband of the small cell of the resource is sorted according to the order of the number from the largest to the smallest, and the frequency allocated to the to-be-assigned frequency is sequentially recovered according to the sorting result and the number of edge sub-bands to be recovered.
  • the first unit is further configured to: determine, according to the frequency resource requirement information reported by the small cell to be allocated the frequency resource, a new edge sub-band to be allocated to the small cell to be allocated the frequency resource, and The small cell to which the frequency resource to be allocated allocates the number of new edge sub-bands, and according to the frequency resource currently occupied by the small cell currently in the small cell of the to-be-assigned frequency resource, and the small cell that needs to be the frequency resource to be allocated The number of new edge sub-bands is allocated, and the edge sub-band is allocated again for the small cell to which the frequency resource is to be allocated.
  • the first unit determines an edge sub-band currently occupied by the current small cell of the small cell of the to-be-allocated frequency resource, and statistically occupies the edge sub-band for each edge sub-band in the edge sub-band
  • the number of small cells is sorted according to the order of the number from small to large, and the number of new edge sub-bands is allocated according to the sorting result and the small cell that needs to allocate the frequency resource to be allocated.
  • the small cell to which the frequency resource is to be allocated re-allocates the edge sub-band.
  • the first unit determines, according to the small cell interference matrix relationship table maintained by the centralized controller, an interference small cell of the small cell to which the frequency resource is to be allocated, where the small cell interference matrix relationship table includes each other.
  • the small cell interference matrix relationship table includes each other.
  • Corresponding relationship between the interfering small cells determining, according to the small cell frequency resource allocation table maintained by the centralized controller, the frequency resources currently occupied by the interfering small cell, wherein the small cell frequency resource allocation table includes each Information about the frequency resources currently occupied by the small cell.
  • the embodiment of the present invention further provides a device, which can implement the process of frequency resource allocation in the embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
  • the apparatus may include: a processor 900, a memory 920, a transceiver 910, and a bus interface.
  • the processor 900 is responsible for managing the bus architecture and the usual processing, and the memory 920 can store the processing.
  • the transceiver 910 is configured to receive and transmit data under the control of the processor 900.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 900 and various circuits of memory represented by memory 920.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 910 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.
  • the flow of frequency resource allocation disclosed in the embodiment of the present invention may be applied to the processor 900 or implemented by the processor 900.
  • each step of the process of frequency resource allocation may be completed by an integrated logic circuit of hardware in the processor 900 or an instruction in the form of software.
  • the processor 900 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, can be implemented or executed in an embodiment of the invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 920, and the processor 900 reads the information in the memory 920 and completes the steps of the frequency resource allocation process in conjunction with its hardware.
  • the processor 900 is configured to read a program in the memory 920 and perform the following process:
  • the small cell of the small cell that is maintained by the centralized controller is determined, and the small cell is used according to the frequency resource currently occupied by the small cell.
  • a frequency resource is allocated; the frequency resource allocated for the small cell is notified to the small cell by the transceiver 910.
  • the processor 900 divides the available frequency resources into a central frequency band and an edge frequency band in advance, wherein the edge frequency band includes a plurality of edge sub-bands.
  • the processor 900 determines that a frequency resource needs to be allocated for the small cell under the control of the centralized controller by: when receiving the initial frequency resource allocation request sent by the small cell under the control of the centralized controller, determining that Assigning, by the small cell, an initial frequency resource; assigning one or more edge subbands to the small cell according to the small cell of the small cell maintained by the centralized controller and the frequency resource currently occupied by the small cell; The central frequency band and the information of the edge sub-band allocated for the small cell are notified to the small cell by the transceiver 910.
  • the processor 900 periodically acquires the frequency resource requirement information reported by the small cell received by the transceiver 910.
  • the processor 900 determines, according to the frequency resource usage information reported by the small cell, that the number of edge subbands allocated to the small cell and the number of edge subbands to be recovered needs to be recovered, and according to the current Interfering with the frequency resources currently occupied by the small cell, and the number of edge sub-bands that need to be recovered, and recovering the edge sub-bands allocated to the small cell.
  • the processor 900 determines an edge subband currently occupied by the small cell of the small cell, and counts the number of small cells occupying the edge subband for each edge subband in the edge subband.
  • the edge sub-bands are sorted according to the order of the number from the largest to the smallest, and the edge sub-bands allocated to the small cell are sequentially recovered according to the sorting result and the number of edge sub-bands to be recovered.
  • the processor 900 determines, according to the frequency resource requirement information reported by the small cell, that a new edge subband needs to be allocated to the small cell and a new edge subband needs to be allocated to the small cell, and according to the The frequency resource currently occupied by the small cell currently interferes with the small cell, and the number of new edge sub-bands that need to be allocated to the small cell, and the edge sub-band is allocated again for the small cell.
  • the processor 900 determines an edge subband currently occupied by the small cell of the small cell, and counts the number of small cells occupying the edge subband for each edge subband in the edge subband, according to Sorting the edge sub-bands from small to large, according to the sorting result, and the number of new edge sub-bands that need to be allocated for the small cell, for the small cell again The edge subband is allocated.
  • the processor 900 determines an interference small cell of the small cell according to the small cell interference matrix relationship table maintained by the centralized controller, where the small cell interference matrix relationship table includes between small cells that interfere with each other. Corresponding relationship; determining, according to the small cell frequency resource allocation table maintained by the centralized controller, the frequency resource currently occupied by the interference small cell, where the small cell frequency resource allocation table includes the frequency resource currently occupied by each small cell Information.
  • the embodiments of the present invention provide an implementation scheme for allocating frequency resources to a Small Cell based on a centralized architecture.
  • the centralized controller allocates frequency resources to the Small Cell, it can allocate new frequency resources to the small cell according to the resource usage requirements and load conditions of the Small Cell. It can also reclaim the allocated frequency resources. Refer to Small when allocating and recovering frequency resources. Cell interferes with the matrix relationship table to reduce interference between Small cells.
  • the present invention dynamically implements frequency resource multiplexing, and each allocation result of the centralized controller The balance between the actual resource requirements of the Small Cell and the system interference is reduced.
  • the resource allocation algorithm of the present invention is simple and efficient, and has no concurrent processing.
  • the present invention uniformly maintains the Small Cell interference matrix relationship table and truly reflects the Small Cell. Actual interference situation between.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种频率资源分配方法及装置，用以在Small Cell密集同频组网场景下，有效降低Small Cell之间的干扰。本发明提供的一种频率资源分配方法，包括：集中控制器当确定需要为该集中控制器控制下的小小区分配频率资源时，确定该集中控制器自身维护的该小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该小小区分配频率资源；所述集中控制器将为该小小区分配的频率资源通知给该小小区。

Description

一种频率资源分配方法及装置
本申请要求在2015年6月8日提交中国专利局、申请号为201510309034.3、发明名称为“一种频率资源分配方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种频率资源分配方法及装置。
背景技术
随着移动宽带技术的蓬勃发展，各种智能终端带来数据业务的井喷式增长。同时，越来越高的数据流量集中在室内外各热点场景。传统的宏基站遇到了建网及覆盖的瓶颈，为了实现网络的深度覆盖和容量提升，同时考虑到成本效应，运营商将更多的注意力转向了小小区(Small Cell)。Small Cell可以很好地完成以高服务质量和低成本来提供高数据速率业务的要求。
在Small Cell同频组网的场景下，Small Cell的密集部署会导致相邻Small Cell之间的距离减小，由此产生严重的干扰问题，降低系统的性能。对此，必须采用有效的干扰管理策略。自适应频率复用(Adaptive Frequency Reuse，AFR)是近来提出的一种技术方案。在AFR方案中，整个系统频带由多个子频带组成。对每个Small Cell而言，系统频带分为正交子频带、复用子频带以及禁止使用的子频带三部分。每个Small Cell都有一个干扰列表，存储与自己有干扰关系的相邻Small Cell。其中，干扰列表的建立方法是，Small Cell上电后，通过网络侦听(Sniffer)功能测量其他Small Cell的参考信号强度，如果参考信号强度超过预先设定的判断门限，则将该Small Cell加入干扰列表中。
AFR的实现过程分为三个步骤：
步骤一：为相互干扰的Small Cell分配一个正交的子频带；
步骤二：依次为Small Cell分配多个正交的子频带，同时保证为有干扰关系的Small Cell分配的子频带相互正交；
步骤三：通过限制相邻Small Cell在相同频带资源上的干扰水平，让相邻Small Cell有条件地重复使用相同的子频带，从而在增加系统频带利用率和降低频带内干扰值二者之间取得折中。
在步骤三中，对于每个非正交子频带，Small Cell需要评估它如果作为复用子频带，对该Small Cell以及其干扰列表中的Small Cell的接收信号信噪比的影响，若接收信噪比在许可门限内，则认为它可以作为该Small Cell的复用子频带。频率资源复用请求和响应(许可或拒绝)通过Small Cell之间的交互过程实现。
现有技术中，AFR方案采用分布式架构，每个Small Cell都需要与相邻的Small Cell交互，这样，当Small Cell数量较多时，Small Cell之间的交互则会十分频繁，传输开销较大。
从实现机制上看，Small Cell可以复用的子频带数目只与无线信号的好坏有关，而不一定匹配自身的负荷或资源使用需求。同时，Small Cell在请求频率资源复用时，需要向相邻的各个Small Cell发送请求消息，只有在收到每个请求Small Cell的复用许可后，才能进行频率复用。这样，不仅时延长，而且成功率低。相邻Small Cell数目越多时，问题越突出。还有，在一些并发情况下，比如，一个Small Cell在发送频率资源复用请求消息后，收到了相邻Small Cell发送的频率资源复用请求消息，实现上很复杂且效果差。
此外，现有技术中，每个Small Cell形成各自的干扰列表。由于测量波动等影响，该列表的部分信息内容可能是单向的，即两个Small Cell不互为干扰关系，不能真实地反映实际干扰情况。
综上所述，现有技术在Small Cell密集同频组网场景下，各个Small Cell自己确定需要占用的频率资源，并且各自维护自己的干扰小区列表，因此存在相邻的Small Cell之间的干扰较大的问题。
发明内容
本发明实施例提供了一种频率资源分配方法及装置，用以在Small Cell密集同频组网场景下，有效降低Small Cell之间的干扰。
本发明实施例提供的一种频率资源分配方法，包括：
集中控制器当确定需要为该集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
所述集中控制器将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
较佳地，预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
较佳地，所述集中控制器通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源；
所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源，具体包括：所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带；
所述集中控制器将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区，具体包括：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
较佳地，该方法还包括：所述集中控制器周期性获取该待分配频率资源 的小小区上报的频率资源需求信息。
较佳地，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带，具体包括：
所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带，具体包括：
所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边 缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区以及所述干扰小小区当前占用的频率资源，包括：所述集中控制器根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该所述确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区以及所述干扰小小区当前占用的频率资源，包括：小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；
所述集中控制器根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
本发明实施例提供的一种频率资源分配装置，包括：
第一单元，用于当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
第二单元，用于将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
较佳地，所述第一单元还用于：预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
较佳地，所述第一单元通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源；
所述第一单元具体用于：根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带；
所述第二单元具体用于：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
较佳地，所述第一单元还用于：周期性获取该待分配频率资源的小小区上报的频率资源需求信息。
较佳地，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述第一单元具体用于：确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该待分配频率资源的小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述第一单元具体用于：确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述第一单元具体用于：根据该集中控制器自身维护的小小区 干扰矩阵关系表，确定该待分配频率资源的小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
本发明实施例还提供了一种频率资源分配装置，包括：处理器、存储器和收发机；
所述收发机用于在处理器的控制下接收和发送数据；
所述存储器用于保存处理器执行操作时所使用的数据；
所述处理器，用于读取所述存储器中的程序，执行下列过程：
当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
在本发明实施例中，集中控制器当确定需要为该集中控制器控制下的小小区分配频率资源时，确定该集中控制器自身维护的该小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该小小区分配频率资源；所述集中控制器将为该小小区分配的频率资源通知给该小小区，使得在Small Cell密集同频组网场景下，由于采用集中式架构，Small Cell之间不需要可靠传输和交互，尤其当Small Cell数量较多时，可以有效降低传输开销；并且，由于集中控制器统一维护Small Cell干扰关系，真实地反映Small Cell之间的实际干扰情况，因此可以有效降低Small Cell之间的干扰。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本发 明的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的集中控制架构示意图；
图2为本发明实施例提供的Small Cell干扰矩阵关系示意图；
图3为本发明实施例提供的频率资源划分示意图；
图4为本发明实施例提供的一种频率资源管理方法的具体流程示意图；
图5为本发明实施例提供的一种频率资源回收方法的流程示意图；
图6为本发明实施例提供的一种频率资源再分配方法的流程示意图；
图7为本发明实施例提供的一种频率资源管理方法的整体示意图；
图8为本发明实施例提供的一种频率资源管理装置的结构示意图；
图9为本发明实施例提供的一种频率资源分配装置的结构示意图。
具体实施方式
本发明实施例提供了一种频率资源分配方法及装置，适用于Small Cell密集同频组网场景，可以有效降低Small Cell之间的干扰。
本发明实施例基于集中式架构，如图1所示。图1中，M个Small Cell与集中控制器相连接。这里，集中控制器为逻辑功能实体，可以为独立的物理设备，也可以与其他物理设备合设，例如可以与网络侧的任一服务器合设。
本发明实施例提供的技术方案中，集中控制器为与其相连的各个Small Cell分配频率资源。具体地，在Small Cell上电启动阶段，集中控制器为Small Cell分配初始的频率资源；在Small Cell工作阶段，集中控制器结合Small Cell当前资源使用需求与负荷情况以及相邻Small Cell的干扰情况，更新Small Cell可以使用的频率资源。在整个过程中，Small Cell可以使用哪些频率资源完全受控于集中控制器，与此同时，集中控制器需要实时维护两张表：Small Cell干扰矩阵关系表和Small Cell频率资源分配表。
其中，Small Cell干扰矩阵关系表，通过Small Cell的网络侦听及上报，和集中控制器对上报内容的处理等过程确定。具体地，Small Cell上电后周期 性主动侦听周边基站的小区信号，测量相邻Small Cell的参考信号接收功率(Reference Signal Received Power，RSRP)并上报给集中控制器。集中控制器对Small Cell的上报信息进行处理，生成Small Cell干扰矩阵关系表。
作为示例，一种简单的处理方法可以是，如果Small Cell对相邻Small Cell的RSRP测量值大于预设门限，则认为二者有干扰，否则，认为没有干扰。本发明对具体的判断准则不作限制。记Small Cell干扰矩阵为[Iij]，其构造方法为：如果Small Celli与Small Cellj有干扰关系，或者，Small Cellj与Small Celli有干扰关系，则Iij＝Iji置1，否则，Iij＝Iji置0，如图2所示。
由图2所示的示例矩阵可见，Small Cell1与Small Cell2、Small Cell3有干扰关系；Small Cell2仅与Small Cell1有干扰关系；Small Cell3与Small Cell1、Small Cell M有干扰关系等等。
Small Cell频率资源分配表中记录了集中控制器管辖下的各个Small Cell已分配的频率资源。假设M个Small Cell同频组网。在本发明实施例中，系统频带资源分为中心频带(Band-Center，BC)和边缘频带(Band-Edge，BE)两部分，边缘频带BE又被划分为N个子频带，这N个子频带资源相互正交。边缘子频带的划分数目N越大，粒度越小，控制得越精细，如图3所示。中心频带BC的大小可通过运行和维护(Operations&Maintenance，O&M)实体配置。中心用户设备优先使用中心频带资源，中心频带资源不够时，可以使用边缘子频带资源；边缘用户设备只能使用边缘子频带资源。
在本发明实施例中，所有Small Cell共享中心频带资源，不同的Small Cell占有相同或不同的边缘子频带，相互干扰的Small Cell尽可能使用不同的边缘子频带，当前资源使用需求与负荷较小的Small Cell尽可能使用较少数目的边缘子频带。集中控制器结合Small Cell的负荷情况以及相邻Small Cell的干扰情况，动态调整其管辖下的各个Small Cell的可用边缘子频带的数目和位置，以降低Small Cell之间的干扰，完成Small Cell边缘子频带的分配过程。
具体的频率资源分配实现流程如图4所示，包括：
步骤1：Small Cell在完成上电启动和侦听上报后，向集中控制器请求分配初始频率资源。
步骤2：集中控制器根据更新的Small Cell干扰矩阵关系表为请求分配初始频率资源的Small Cell分配一个或多个边缘子频带。
步骤3：集中控制器向该Small Cell响应资源分配结果，其中包括中心频带，和一个或多个边缘子频带；之后，该Small Cell根据集中控制器发送的资源分配结果进入工作阶段。
需要说明的是，后续集中控制器为Small Cell调整分配的频率资源时，无需再发送中心频带的信息，只需要通知Small Cell边缘子频带的信息即可，因为所有Small Cell共享的中心频带资源是预先设置好的，若后续发生调整了，再进行通知更新后的中心频带资源信息即可。
步骤4：集中控制器更新Small Cell频率资源分配表。
步骤5：在工作阶段，Small Cell周期性进行资源使用情况统计并上报集中控制器。
步骤6：集中控制器判决是否需要为Small Cell分配新的边缘子频带或回收已分配的边缘子频带；如果需要分配或回收边缘子频带，集中控制器根据Small Cell的统计上报以及结合自身维护的干扰矩阵关系和频率资源分配表，确定需要分配或回收边缘子频带的数目及其位置。
步骤7：如果需要分配或回收边缘子频带，集中控制器向Small Cell发送频率资源更新指示消息，指示其新的可用边缘子频带信息，Small Cell根据集中控制器的资源分配结果进行用户设备(User Equipment，UE)资源分配。
步骤8：如果需要分配或回收边缘子频带，集中控制器更新Small Cell频率资源分配表。
上述步骤7和步骤8是可选步骤。
其中，步骤7中的具体实现方式，例如包括：
步骤一：集中控制器启动定时器，对在定时器一次运行期间内收到的Small Cell的上报消息统一处理；定时器的定时时长通过O&M配置，该时长 的设置取决于Small Cell与集中控制器之间的传输延时。
步骤二：Small Cell上报的消息中携带该Small Cell当前资源使用需求与负荷情况，包括已接纳的UE数、边缘UE数、边缘物理资源块(Physical Resource Block，PRB)资源需求量等，这里，具体内容不作限制。集中控制器根据Small Cell上报的当前资源使用需求与负荷情况和为该Small Cell已分配的边缘子频带情况，确定是否需要为各个Small Cell分配或回收边缘子频带以及相应的边缘子频带数目。
如表1所给出一个简单的示例，假设Small Cell当前资源使用需求情况为T，预设两个资源使用需求门限分别为第一门限TH1和第二门限TH2，TH1<TH2。不同资源使用需求情况下需要的边缘子频带数目不同。
表1
Figure PCTCN2016081456-appb-000001
Figure PCTCN2016081456-appb-000002
由表1可知，最终可以根据表1中第四列得到的差值，确定是否需要为Small Cell再分配边缘子频带，以及若需要再分配边缘子频带时所需要再分配的边缘子频带数目，或者确定是否需要回收为Small Cell已经分配的边缘子频带，以及若需要回收已分配的边缘子频带时，所需要回收的已分配的边缘子频带数目。例如，若一Small Cell的当前资源使用需求T<TH1，则若A1-B大于零，确定需要为该Small Cell再分配A1-B个边缘子频带，若A1-B等于零，则确定不需要为该Small Cell再分配或者回收边缘子频带，若A1-B小于零，则确定需要回收已经为该Small Cell分配的A1-B的绝对值个边缘子频带。TH1≤T<TH2，以及T≥TH2的情况同理，不再赘述。
实际情况下，资源使用情况的判决也可以有其他方式，本发明实施例不进行限定。
假设集中控制器共接收了M个Small Cell的上报，其中，采用上表所示方式确定M1个Small Cell需要回收边缘子频带，M2个Small Cell需要再分配边缘子频带，M3个Small Cell既不需要回收也不需要分配边缘子频带；这里，M＝M1+M2+M3。
步骤三：假设当确定需要对M1个Small Cell进行边缘子频带资源回收时，参见图5，采用如下步骤对该M1个Small Cell进行边缘子频带资源回收处理：
S501、令m＝1。
S502、针对第m个需要释放边缘子频带的Small Cell，根据维护的Small Cell干扰矩阵关系表，获取与该Small Cell有干扰关系的相邻Small Cell集合，假设共有L1个干扰Small Cell；这L1个干扰Small Cell，与所述第m个Small Cell存在共用的边缘子频带资源。
S503、根据维护的Small Cell频率资源分配表，确定为这L1个Small Cell中每一Small Cell已分配的边缘子频带，并针对这些已分配的边缘子频带中的 每一个边缘子频带进行统计，统计每一边缘子频带被多少个Small Cell占用，根据统计结果由大到小的顺序，对这些已分配的边缘子频带进行排序，得到这些已分配的边缘子频带的排序结果。
例如，第一Small Cell有10个干扰Small Cell，根据Small Cell频率资源分配表确定这10个干扰Small Cell所占用的边缘子频带，例如有三个边缘子频带，其中第一边缘子频带被这10个干扰Small Cell中的6个Small Cell占用，第二边缘子频带被这10个干扰Small Cell中的8个Small Cell占用，第三边缘子频带被这10个干扰Small Cell中的3个Small Cell占用，则排序结果为第二边缘子频带、第一边缘子频带、第三边缘子频带。若第一Small Cell需要释放一个边缘子频带资源，则释放第二边缘子频带资源，若第一Small Cell需要释放两个边缘子频带资源，则释放第二边缘子频带和第一边缘子频带的资源。
S504、按照步骤二中所示的表格确定需要释放的边缘子频带数目，依次选择所述排序结果中排序最靠前的边缘子频带进行释放。
S505、更新Small Cell频率资源分配表。
S506、集中控制器向该Small Cell发送频率资源更新指示消息，指示其可用的边缘子频带信息，其中不包括已被释放的边缘子频带的信息。
S507、m＝m+1。
S508、判断m是否小于或等于M1，如果是，则转到步骤S502，否则，结束。
步骤四：假设当确定有M2个Small Cell需要再分配边缘子频带时，参见图6，对这M2个Small Cell采用如下步骤进行边缘子频带资源的再分配处理：
S601、令m’＝1。
S602、针对第m’个需要再分配边缘子频带的Small Cell，根据维护的Small Cell干扰矩阵关系表，获取与该Small Cell有干扰关系的相邻Small Cell集合，假设共有L2个Small Cell。
S603、根据维护的Small Cell频率资源分配表，确定这L2个Small Cell 的边缘子频带分配情况，即确定这L2个Small Cell占用的边缘子频带，针对这L2个Small Cell占用的边缘子频带中的每一个边缘子频带进行统计，统计每一个边缘子频带被多少个Small Cell占用，按照统计结果由小到大的排序，对这L2个Small Cell占用的边缘子频带进行排序，得到排序结果。
S604、针对该Small Cell，按照步骤S603的排序结果，以及需要为该Small Cell再分配的边缘子频带数目，从这L2个Small Cell占用的边缘子频带中选择排序结果最靠前的一个或多个边缘子频带进行分配；其中，需要为该Small Cell再分配的边缘子频带数目由步骤二确定。
例如，第二Small Cell有10个干扰Small Cell，根据Small Cell频率资源分配表确定这10个干扰Small Cell所占用的边缘子频带，例如有三个边缘子频带，其中第一边缘子频带被这10个干扰Small Cell中的6个Small Cell占用，第二边缘子频带被这10个干扰Small Cell中的8个Small Cell占用，第三边缘子频带被这10个干扰Small Cell中的3个Small Cell占用，则排序结果为第三边缘子频带、第一边缘子频带、第二边缘子频带。若第二Small Cell需要再分配一个边缘子频带资源，则分配第三边缘子频带资源，若第二Small Cell需要再分配两个边缘子频带资源，则分配第三边缘子频带和第一边缘子频带的资源。
S605、更新Small Cell频率资源分配表。
S606、集中控制器向该Small Cell发送频率资源更新指示消息，指示其可用的边缘子频带信息，其中包括为该Small Cell再分配的边缘子频带信息。
S607、令m’＝m’+1。
S608、判断m’是否小于或等于M2，如果是，则转到S602，否则，结束。
由此可见，参见图7，本发明实施例提供的一种频率资源分配方法，包括：
S101、集中控制器当确定需要为该集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该小小区分配频率资源；
S102、所述集中控制器将为该待分配频率资源的小小区分配的频率资源 通知给该待分配频率资源的小小区。
较佳地，预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
较佳地，所述集中控制器通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源。
所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源，具体包括：所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带。
所述集中控制器将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区，具体包括：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
较佳地，该方法还包括：所述集中控制器周期性获取所述待分配频率资源的小小区上报的频率资源需求信息。
较佳地，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带，具体包括：
所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带(至少包括一个边缘子频带，多数情况下可能占用多个边缘子频带)，并针对该当前占用的边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对该当前占用的边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该待分配频率资源的小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带，具体包括：
所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带(至少包括一个边缘子频带，多数情况下可能占用多个边缘子频带)，并针对该当前占用的边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该当前占用的边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述集中控制器根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该待分配频率资源的小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；集中控制器根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占 用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
与该方法相对应地，参见图8，本发明实施例提供的一种频率资源分配装置，包括：
第一单元11，用于当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
第二单元12，用于将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
较佳地，所述第一单元预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
较佳地，所述第一单元通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源。
所述第一单元根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带。
所述第二单元具体用于：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
较佳地，所述第一单元还用于：周期性获取所述待分配频率资源的小小区上报的频率资源需求信息。
较佳地，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述第一单元确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
较佳地，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该待分配频率资源的小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述第一单元确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
较佳地，所述第一单元根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该待分配频率资源的小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
基于相同的技术构思，本发明实施例还提供了一种装置，该装置可以实现本发明实施例频率资源分配的流程。
参见图9，为本发明实施例提供的装置的结构示意图，该装置可包括：处理器900、存储器920、收发机910以及总线接口。
处理器900负责管理总线架构和通常的处理，存储器920可以存储处理 器900在执行操作时所使用的数据。收发机910用于在处理器900的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器900代表的一个或多个处理器和存储器920代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机910可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器900负责管理总线架构和通常的处理，存储器920可以存储处理器900在执行操作时所使用的数据。
本发明实施例揭示的频率资源分配的流程，可以应用于处理器900中，或者由处理器900实现。在实现过程中，频率资源分配的流程的各步骤可以通过处理器900中的硬件的集成逻辑电路或者软件形式的指令完成。处理器900可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器920，处理器900读取存储器920中的信息，结合其硬件完成频率资源分配流程的步骤。
具体地，处理器900，用于读取存储器920中的程序，执行下列过程：
当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器自身维护的该小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该小小区分配频率资源；将为该小小区分配的频率资源通过收发机910通知给该小小区。
较佳地，处理器900预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
较佳地，处理器900通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源；根据该集中控制器自身维护的该小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该小小区分配一个或多个边缘子频带；将所述中心频带和为该小小区分配的所述边缘子频带的信息通过收发机910通知给该小小区。
较佳地，处理器900周期性获取通过收发机910接收到的该小小区上报的频率资源需求信息。
较佳地，处理器900根据所述小小区上报的频率资源使用情况信息，确定需要回收已分配给该小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该小小区的边缘子频带。
较佳地，处理器900确定该小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该小小区的边缘子频带。
较佳地，处理器900根据所述小小区上报的频率资源需求信息，确定需要为该小小区分配新的边缘子频带以及需要为该小小区分配新的边缘子频带的个数，并根据该小小区当前的干扰小小区当前占用的频率资源，以及需要为该小小区分配新的边缘子频带的个数，为该小小区再次分配边缘子频带。
较佳地，处理器900确定该小小区当前的干扰小小区当前占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该小小区分配新的边缘子频带的个数，为该小小区再次 分配边缘子频带。
较佳地，处理器900根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
综上所述，本发明实施例提供了基于集中式架构，为Small Cell分配频率资源的实现方案。集中控制器为Small Cell分配频率资源时，参考Small Cell的资源使用需求与负荷情况，可以为其分配新的频率资源；也可以回收为其分配的频率资源；在分配和回收频率资源时参考Small Cell干扰矩阵关系表，以降低Small Cell之间干扰。并且，由于采用集中式架构，Small Cell之间不需要可靠传输和交互，尤其当Small Cell数量较多时，可以有效降低传输开销；本发明动态实现频率资源复用，集中控制器的每一次分配结果都是尽力实现Small Cell实际资源需求和降低系统干扰二者之间的平衡；本发明资源分配算法实现简单高效，没有并发处理；本发明统一维护Small Cell干扰矩阵关系表，真实地反映Small Cell之间的实际干扰情况。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (19)

  1. 一种频率资源分配方法，其特征在于，该方法包括：
    集中控制器当确定需要为该集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
    所述集中控制器将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
  2. 根据权利要求1所述的方法，其特征在于，还包括：预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
  3. 根据权利要求2所述的方法，其特征在于，所述集中控制器通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源；
    所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源，具体包括：所述集中控制器根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带；
    所述集中控制器将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区，具体包括：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
  4. 根据权利要求3所述的方法，其特征在于，该方法还包括：所述集中控制器周期性获取该待分配频率资源的小小区上报的频率资源需求信息。
  5. 根据权利要求4所述的方法，其特征在于，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
  6. 根据权利要求5所述的方法，其特征在于，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带，具体包括：
    所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
  7. 根据权利要求4所述的方法，其特征在于，该方法还包括：所述集中控制器根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该待分配频率资源的小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
  8. 根据权利要求7所述的方法，其特征在于，所述集中控制器根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带，具体包括：
    所述集中控制器确定该待分配频率资源的小小区当前的干扰小小区当前 占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
  9. 根据权利要求1-8任一权项所述的方法，其特征在于，所述确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区以及所述干扰小小区当前占用的频率资源，包括：
    所述集中控制器根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该待分配频率资源的小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；
    所述集中控制器根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
  10. 一种频率资源分配装置，其特征在于，该装置包括：
    第一单元，用于当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
    第二单元，用于将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
  11. 根据权利要求10所述的装置，其特征在于，所述第一单元还用于：预先将可用的频率资源划分为中心频带和边缘频带，其中所述边缘频带包括多个边缘子频带。
  12. 根据权利要求11所述的装置，其特征在于，所述第一单元通过如下方式确定需要为该集中控制器控制下的小小区分配频率资源：当接收到该集中控制器控制下的小小区发送的初始频率资源分配请求时，确定需要为该小小区分配初始频率资源；
    所述第一单元具体用于：根据该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，以及所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配一个或多个边缘子频带；
    所述第二单元具体用于：将所述中心频带和为该待分配频率资源的小小区分配的所述边缘子频带的信息通知给该待分配频率资源的小小区。
  13. 根据权利要求12所述的装置，其特征在于，所述第一单元还用于：周期性获取该待分配频率资源的小小区上报的频率资源需求信息。
  14. 根据权利要求13所述的装置，其特征在于，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源使用情况信息，确定需要回收已分配给该待分配频率资源的小小区的边缘子频带以及需要回收的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要回收的边缘子频带的个数，回收已分配给该待分配频率资源的小小区的边缘子频带。
  15. 根据权利要求14所述的装置，其特征在于，所述第一单元具体用于：确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对所述边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从大到小的顺序，对所述边缘子频带进行排序，根据排序结果，以及需要回收的边缘子频带的个数，依次回收已分配给该待分配频率资源的小小区的边缘子频带。
  16. 根据权利要求13所述的装置，其特征在于，所述第一单元还用于：根据所述待分配频率资源的小小区上报的频率资源需求信息，确定需要为该待分配频率资源的小小区分配新的边缘子频带以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，并根据该待分配频率资源的小小区当前的干扰小小区当前占用的频率资源，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
  17. 根据权利要求16所述的装置，其特征在于，所述第一单元具体用于： 确定该待分配频率资源的小小区当前的干扰小小区当前占用的边缘子频带，并针对该边缘子频带中的每一边缘子频带统计占用该边缘子频带的小小区的个数，根据个数从小到大的顺序，对该边缘子频带进行排序，根据排序结果，以及需要为该待分配频率资源的小小区分配新的边缘子频带的个数，为该待分配频率资源的小小区再次分配边缘子频带。
  18. 根据权利要求10-17任一权项所述的装置，其特征在于，所述第一单元具体用于：
    根据该集中控制器自身维护的小小区干扰矩阵关系表，确定该待分配频率资源的小小区的干扰小小区，其中，所述小小区干扰矩阵关系表包括相互干扰的小小区之间的对应关系；
    根据该集中控制器自身维护的小小区频率资源分配表，确定所述干扰小小区当前占用的频率资源，其中，所述小小区频率资源分配表包括每一小小区当前占用的频率资源的信息。
  19. 一种频率资源分配装置，其特征在于，包括：处理器、存储器和收发机；
    所述收发机，用于在所述处理器的控制下接收和发送数据；
    所述存储器，用于保存处理器执行操作时所使用的数据；
    所述处理器，用于读取所述存储器中的程序，执行下列过程：
    当确定需要为集中控制器控制下的小小区分配频率资源时，确定该集中控制器控制下的该待分配频率资源的小小区的干扰小小区，并根据所述干扰小小区当前占用的频率资源，为该待分配频率资源的小小区分配频率资源；
    将为该待分配频率资源的小小区分配的频率资源通知给该待分配频率资源的小小区。
PCT/CN2016/081456 2015-06-08 2016-05-09 一种频率资源分配方法及装置 WO2016197773A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510309034.3A CN104918331B (zh) 2015-06-08 2015-06-08 一种频率资源分配方法及装置
CN201510309034.3 2015-06-08

Publications (1)

Publication Number Publication Date
WO2016197773A1 true WO2016197773A1 (zh) 2016-12-15

Family

ID=54086920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/081456 WO2016197773A1 (zh) 2015-06-08 2016-05-09 一种频率资源分配方法及装置

Country Status (2)

Country Link
CN (1) CN104918331B (zh)
WO (1) WO2016197773A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104918331B (zh) * 2015-06-08 2019-02-26 大唐移动通信设备有限公司 一种频率资源分配方法及装置
CN105357759B (zh) * 2015-09-25 2019-01-18 厦门大学 一种小基站集中配置资源的方法、设备和系统
CN107396444B (zh) * 2016-05-17 2020-06-12 大唐移动通信设备有限公司 一种小小区的载波动态调整方法和装置
US10136330B2 (en) * 2016-08-09 2018-11-20 Qualcomm Incorporated Staggered channel changing for cells of spectrum sharing networks
CN106028346B (zh) * 2016-08-12 2019-05-07 桂林电子科技大学 一种小小区的频谱拍卖方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101998412A (zh) * 2009-08-11 2011-03-30 中国移动通信集团公司 分配频率资源的方法、家庭基站管理系统及毫微微基站
CN102612041A (zh) * 2011-01-20 2012-07-25 华为技术有限公司 Ofdm小基站和异系统网络频谱共享方法及网络设备
US20120201159A1 (en) * 2011-02-04 2012-08-09 Nec Corporation Radio communication system, base station apparatus, radio resource control method, and non-transitory computer readable medium
CN104105099A (zh) * 2013-04-07 2014-10-15 电信科学技术研究院 一种频谱动态分配方法和设备
CN104918331A (zh) * 2015-06-08 2015-09-16 大唐移动通信设备有限公司 一种频率资源分配方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9161364B2 (en) * 2011-12-21 2015-10-13 Qualcomm Incorporated Methods and apparatus for assignment dependent downlink channel processing for wireless networks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101998412A (zh) * 2009-08-11 2011-03-30 中国移动通信集团公司 分配频率资源的方法、家庭基站管理系统及毫微微基站
CN102612041A (zh) * 2011-01-20 2012-07-25 华为技术有限公司 Ofdm小基站和异系统网络频谱共享方法及网络设备
US20120201159A1 (en) * 2011-02-04 2012-08-09 Nec Corporation Radio communication system, base station apparatus, radio resource control method, and non-transitory computer readable medium
CN104105099A (zh) * 2013-04-07 2014-10-15 电信科学技术研究院 一种频谱动态分配方法和设备
CN104918331A (zh) * 2015-06-08 2015-09-16 大唐移动通信设备有限公司 一种频率资源分配方法及装置

Also Published As

Publication number Publication date
CN104918331A (zh) 2015-09-16
CN104918331B (zh) 2019-02-26

Similar Documents

Publication Publication Date Title
WO2016197773A1 (zh) 一种频率资源分配方法及装置
US10779278B2 (en) Inter-frequency and intra-frequency measurement management
US20170041931A1 (en) Method and device for scheduling resources in internet of vehicles system
US9693348B2 (en) Base station resource allocation
WO2015196980A1 (zh) 一种频谱分配方法、装置和系统
US10117103B2 (en) Method for sharing network and network element
CN102204310A (zh) 资源分配方法、装置和基站
WO2020029698A1 (zh) 上行信道资源的指示及确定方法、基站、终端、介质
KR101630563B1 (ko) 스펙트럼 관리 시스템 및 방법
US20180343658A1 (en) Communication system and method
WO2017113915A1 (zh) 一种频谱资源的分配方法及装置
US10772077B2 (en) Cell radio network temporary identifier C-RNTI allocation method and device
JP6106289B2 (ja) インタフェース協調方法及び基地局
JP2018526911A (ja) 通信リソース割振り
TWI633804B (zh) Communication control device, communication control method, and information processing device
US9544905B2 (en) Baseband resource allocation method and device thereof
US20210409963A1 (en) Spectrum device, wireless communication system, wireless communication method and storage medium
WO2017020271A1 (en) Method and network node for dynamic resource allocation for control channels
TW201804829A (zh) 電子設備和用於電子設備的方法
US20140126481A1 (en) Block Scheduling Method For Scalable And Flexible Scheduling In A HSUPA System
WO2019105165A1 (zh) 一种资源分配的方法、装置及存储介质
CN112020099B (zh) 一种上行数据的分流方法及装置
CN106413073B (zh) 一种mrru小区的功率动态分配方法和装置
CN112770339B (zh) 一种协作小区确定方法及装置
CN105657831B (zh) 基带资源管理方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16806671

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16806671

Country of ref document: EP

Kind code of ref document: A1