WO2017152719A1 - Procédé et dispositif de coordination entre cellules dans un système lte, et support de stockage informatique - Google Patents

Procédé et dispositif de coordination entre cellules dans un système lte, et support de stockage informatique Download PDF

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Publication number
WO2017152719A1
WO2017152719A1 PCT/CN2017/071601 CN2017071601W WO2017152719A1 WO 2017152719 A1 WO2017152719 A1 WO 2017152719A1 CN 2017071601 W CN2017071601 W CN 2017071601W WO 2017152719 A1 WO2017152719 A1 WO 2017152719A1
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resource
cell
resource block
comp
comp user
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PCT/CN2017/071601
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English (en)
Chinese (zh)
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黄琛
李楠
顾军
袁航周
白楠
刘铮
陆勇
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, apparatus, and computer storage medium for inter-cell cooperation in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution-Advanced
  • HetNet heterogeneous network
  • Dense cells can increase the frequency reuse rate, but at the same time increase the co-channel interference between cells. Especially for cell edge users, it will be strongly interfered by multiple neighboring cells, and its user data rate and spectrum efficiency are very low, and the user experience is poor. In order to solve the problem of strong interference from edge users, a series of solutions are proposed in the 3GPP (3GPP, 3rd Generation Partnership Project) LTE and LTE-A standards.
  • 3GPP 3GPP, 3rd Generation Partnership Project
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • the collaboration information between the evolved Node Bs is transmitted through the X2 interface, including the interference load status information and the user planes that need to switch user equipments (UE, User Equipment). Data and control information, almost blank sub-frame pattern (ABS Pattern, Almost Blank Subframe Pattern).
  • the eNode B can use this information to perform inter-cell interference coordination to a certain extent.
  • the LTE-A standard also supports X2 connection. Inter-cell communication based on Radio Resource Management (RRM) function, such as inter-cell interference coordination (ICIC) cooperation through interaction of high-interference information through interfaces; interaction of ABS pattern information through interfaces Inter-cell cooperation and interference coordination based on ABS pattern.
  • RRM Radio Resource Management
  • LTE-A has introduced Coordinated Multiple Points (CoMP) to better solve the problem of inter-cell interference only because the above-mentioned inter-cell cooperation and interference coordination cannot be better.
  • CoMP Coordinated Multiple Points
  • An important technical solution in CoMP is Coordinated Schedule (CS).
  • each cell independently performs scheduling and resource allocation for the UEs within the coverage of the cell, that is, parallel scheduling and resource allocation among the cells.
  • the coordination and cooperation of multiple interference source cells of the CoMP user cannot be performed.
  • the resource coordination of the CoMP users may conflict, and the resource allocation of the CoMP users may not be completely orthogonal. Therefore, the performance gain of the CoMP user may be restricted.
  • each cell disables many radio resources in order to cooperate with the CoMP users of the interfering cell. This will result in a serious decline in system resource utilization, affecting the overall throughput and performance of the system.
  • the embodiments of the present invention provide a method, an apparatus, and a computer storage medium for inter-cell cooperation in an LTE system.
  • a method for inter-cell cooperation in an LTE system including:
  • Step 1 Obtain a resource pre-allocation map of each cell in the coordinated area.
  • the resource pre-allocation map identifies the nature and status of each resource block of the cell, and the properties of the resource block include: CoMP UE resources and common resources. And a backup resource; the status of the resource block is identified as undivided Match
  • Step 2 Select a CoMP user among the CoMP users, and determine a resource block that can be used by the selected CoMP user according to the resource pre-allocation map of the selected CoMP user service cell;
  • Step 3 Determine, according to the nature and state of the resource block of the coordinated cell of the selected CoMP user, the interference level of each resource block that is used by the coordinated resource block, and determine the coordination cost generated by selecting each available resource block, and A resource block with a low interference level and a small coordination cost is selected from each of the available resource blocks as a resource block to be occupied by the selected CoMP user;
  • Step 4 Update the nature of the selected resource block in the resource pre-allocation map of the serving cell to the CoMP UE resource, update the status to the allocated, and use the selected resource in the resource pre-allocation map of each coordinated cell.
  • the nature of the same resource block of the resource block is updated to the backup resource, and the status is updated to be allocated;
  • Step 5 Select a next CoMP user among the CoMP users, and return to step 2 based on the resource pre-allocation map of each currently updated cell until the set termination condition is met;
  • Step 6 The resource pre-allocation map of each cell that is updated when the termination condition is reached is sent to the corresponding cell, and cooperative control of each cell is performed.
  • a method for inter-cell cooperation in an LTE system is provided, which is applied to each cell in a collaboration area, including:
  • the resource scheduling includes: scheduling, by using, the CoMP UE resource allocated in the resource pre-allocation graph, the CoMP user, in the resource pre-allocation graph
  • the allocated backup resources are not scheduled, and the non-CoMP users are scheduled using the remaining resources in the resource pre-allocation map.
  • an apparatus for inter-cell cooperation in an LTE system including:
  • An acquiring module configured to acquire a resource pre-allocation map of each cell in the cooperation area; the resource pre-allocation map identifies the nature and status of each resource block of the cell, where the nature of the resource block includes: multi-point cooperative CoMP a UE resource, a normal resource, and a backup resource; the status of the resource block is identified as unallocated;
  • the available resource determining module is configured to select a CoMP user among the CoMP users, and determine a resource block that can be used by the selected CoMP user according to the selected resource pre-allocation map of the CoMP user service cell;
  • the resource selection module is configured to determine, according to the nature and state of the resource block of the coordinated cell of the selected CoMP user, the interference level of each resource block that is used by the coordinated cell resource block, and determine a coordination cost generated by selecting each available resource block. And selecting, among each available resource block, a resource block with a low interference level and a small coordination cost as a resource block to be occupied by the selected CoMP user;
  • an update module configured to update a property of the selected resource block in the resource pre-allocation map of the serving cell to a CoMP UE resource, update the status to an allocated, and use a pre-allocation map of the resources of each coordinated cell.
  • the nature of the same resource block of the selected resource block is updated to the backup resource, and the status is updated to be allocated;
  • An iterative module configured to select a next CoMP user among the CoMP users, and trigger the available resource determining module based on the resource pre-allocation map of each currently updated cell until the set termination condition is met;
  • the cooperation control module is configured to send the resource pre-allocation map of each cell that is updated when the termination condition is reached to the corresponding cell, and perform cooperative control of each cell.
  • a cell in an LTE system where the cell is a cell in a collaboration area, includes:
  • a receiving module configured to receive a resource pre-allocation map of the current cell
  • a scheduling module configured to perform resources according to resource allocation of the resource pre-allocation map
  • the scheduling of the resource includes: using the CoMP UE resource allocated in the resource pre-allocation graph, scheduling the CoMP user, not scheduling the backup resource allocated in the resource pre-allocation map, and pre-using the resource Allocating the remaining resources in the graph to schedule non-CoMP users.
  • a computer storage medium comprising a set of instructions, when the instruction is executed, causing at least one processor to perform the inter-cell cooperation in the LTE system described above .
  • the solution provided by the embodiment of the present invention can more effectively solve the problem that effective coordination and interference coordination cannot be performed between multiple interference source cells of a CoMP user, and the effect of improving frequency efficiency and cell throughput is achieved.
  • the embodiment of the present invention can continuously update the resource pre-allocation map on the basis of each resource pre-allocation graph, and gradually approach the optimal resource pre-allocation effect, that is, occupying as few backup resources as possible and serving more CoMP users.
  • the backup resource is occupied as little as possible, and the resource utilization of the system is improved.
  • FIG. 1 is a schematic diagram of a bitmap of a radio resource property division according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for inter-cell cooperation in an LTE system according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a N_Change calculation method according to an embodiment of the present invention.
  • FIG. 4 is a resource pre-allocation diagram after a certain CoMP user determines to occupy a resource block according to an embodiment of the present invention
  • FIG. 5 is a resource pre-allocation diagram updated after all CoMP users divide resources according to an embodiment of the present invention
  • FIG. 6 is a structural block diagram of an inter-cell cooperation apparatus in an LTE system according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a cell in an LTE system according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for inter-cell cooperation in an LTE system, which is based on resource pre-allocation of inter-cell resources in the previous cycle, and determines the pre-allocation of resources between the cells according to user requirements in the current cycle and iteratively updates.
  • the resources are circumvented to meet the needs of various CoMP users, and the problem of inter-cell cooperation and interference coordination is solved.
  • the embodiments of the present invention classify the properties of the radio resources of the entire system bandwidth into three categories: (1) CoMP UE resources, and the CoMP UE resources are pre-allocated to the cell CoMP UEs. Resources used; (2) backup resources, which are coordinated resources used to avoid interference with neighboring cell CoMP UEs, and the cell will not send any data on the backup resources; (3) common resources, common resources are pre-allocated The resources used by the cell non-CoMP UE. As shown in FIG. 1, a schematic diagram of a bitmap for the nature of radio resources. Of course, the above “preparation The names of "resources", “CoMP UE resources” and the like are described for convenience of use, and those skilled in the art may also substitute other names.
  • FIG. 2 a method for inter-cell cooperation in an LTE system according to an embodiment of the present invention is as shown in FIG. 2, and includes the following steps:
  • Step S201 Obtain a resource pre-allocation map of each cell in the coordinated area.
  • the resource pre-allocation map identifies the nature and status of each resource block of the cell, and the properties of the resource block include: CoMP UE resources and common resources. And a backup resource; the status of the resource block is identified as unallocated;
  • the cell in the cooperation area includes the serving cell of the CoMP user and the strong interfering cell for the CoMP user.
  • the cooperation needs to be circumvented, and these strong interfering cells are referred to as coordinated cells.
  • the resource pre-allocation map of each cell in the cooperation area is obtained, which includes: detecting whether there is a resource pre-allocation map of the previous period in each cell, and if yes, acquiring the resource pre-preparation of the cell in the previous period.
  • the allocation map if not existing, creates an initial resource pre-allocation map for the cell; the nature of each resource block in the initial resource pre-allocation graph is identified as a common resource.
  • Step S202 selecting a CoMP user among each CoMP user
  • Step S203 Determine, according to a resource pre-allocation map of the serving cell of the CoMP user, a resource block that is available to the CoMP user.
  • all resource blocks in the resource pre-allocation graph of the serving cell that are unallocated are determined to be resource blocks that can be used by the CoMP user.
  • Step S204 Determine, according to the nature and state of the resource block of the coordinated cell of the CoMP user, the interference level of each available resource block by the coordinated cell resource block, and determine a coordination cost generated by selecting each available resource block, and A resource block that is low in interference level and small in coordination cost is selected as a resource block to be occupied by the CoMP user;
  • the first decision is made before selecting the resource block to be occupied by the CoMP user. Determining whether the number of resource blocks required by the CoMP user reaches the upper limit of the total number of CoMP UE resources of the serving cell, and if yes, determining the number of current remaining CoMP UE resources as the number of resources used by the CoMP user; otherwise, determining the CoMP
  • the number of resource blocks required by the user is the number of resources used by the CoMP user.
  • the resource block with low mutual interference with the resource block of the coordinated cell is selected as the resource block to be occupied by the CoMP user in each available resource block according to the determined number of resources.
  • selecting a resource block with a low interference level and a small coordination cost among the available resource blocks as a resource block to be occupied by the CoMP user may be implemented as follows:
  • each available resource block Prioritize each available resource block according to a set ranking policy based on the interference level of each available resource block by the coordinated cell resource block and the coordination cost generated by selecting each available resource block; In order, the resource blocks to be occupied by the CoMP user are selected in each available resource block.
  • the person skilled in the art can set the ranking strategy (sorting algorithm) according to the two parameters based on the two parameters, for example, the interference level and the coordination cost can be respectively given differently.
  • the weight of the sum is the sum of the two, etc., and the specific sorting algorithm can be flexibly set according to the needs of the person skilled in the art, and the present invention does not limit it.
  • determining the interference level of each available resource block by the coordinated cell resource block includes:
  • determining a coordination cost generated by selecting each available resource block includes:
  • the value of the unallocated common resource is ⁇
  • the unallocated backup resource is less than ⁇
  • the unallocated CoMP UE resource is greater than ⁇
  • the allocated resource is set to The principle of the standard value is determined, and the same resource block in the coordinated cell as the available resource block is assigned, and the sum of the resource block assignment values of each coordinated cell is obtained, and the coordination cost of the available resource block is obtained;
  • the assignment of the unallocated common resource, the backup resource, and the CoMP UE resource is greater than the standard value.
  • Step S205 Update the nature of the selected resource block in the resource pre-allocation map of the serving cell to the CoMP UE resource, update the status to the allocated, and use the selected resource in the resource pre-allocation map of each coordinated cell.
  • the nature of the same resource block of the resource block is updated to the backup resource, and the status is updated to be allocated;
  • Step S206 selecting a next CoMP user among the CoMP users, and returning to step S203 based on the resource pre-allocation map of each currently updated cell, until the set termination condition is met;
  • the set termination condition includes that the number of CoMP user resources of each cell in the cooperation area reaches an upper limit or the CoMP user has performed resource pre-allocation.
  • step S207 the resource pre-allocation map of each cell updated when the termination condition is reached is sent to the corresponding cell, and cooperative control of each cell is performed.
  • all the resources in the resource pre-allocation map of each cell that are updated when the termination condition is reached are updated to the common resource, and the status is updated to allocated.
  • an embodiment of the present invention further provides a method for inter-cell cooperation in an LTE system. Applying to each cell in the collaboration area includes the following steps:
  • Step 1 Receive a resource pre-allocation map of the cell.
  • Step 2 Perform resource scheduling according to the resource allocation of the resource pre-allocation map.
  • the resource scheduling includes: scheduling, by using, the CoMP UE resources allocated in the resource pre-allocation graph, scheduling the CoMP user The backup resources allocated in the allocation map are not scheduled, and the non-CoMP users are scheduled by using the remaining resources in the resource pre-allocation map.
  • the method used in the embodiments of the present invention can more effectively solve the problem of CoMP users, inter-cell cooperation and interference coordination, and achieve the effects of improving frequency efficiency and cell throughput.
  • the embodiment of the present invention can continuously update the resource pre-allocation map on the basis of each resource pre-allocation graph, and gradually approach the optimal resource pre-allocation effect, that is, occupying as few backup resources as possible and serving more CoMP users.
  • the backup resource is occupied as little as possible, and the resource utilization of the system is improved.
  • the method provided by the present example for inter-cell cooperation is applicable to a mobile communication system, especially an LTE-A system.
  • the details are described below in conjunction with specific steps.
  • the specific implementation steps of this example are as follows:
  • n strong interfering cells of the CoMP user namely CoCell1 and CoCell2, respectively, these strong interfering cells are referred to as coordinated cells.
  • Preliminary step if the resource pre-allocation map of the previous period exists in the cell, the resource pre-allocation map of the previous period is used as a basis. If not, the initial resource pre-allocation map is established for the cell, and all resource blocks in the initial resource pre-allocation map are used. The nature of the products are marked as "ordinary resources.” The resource block of the initial resource pre-allocation map and the flag of the resource block of the previous period resource pre-allocation map (which can be understood as the state of the resource block) are all marked as "not updated (can be understood as unallocated)".
  • Step 1 Select CoMP users according to the priority of CoMP users.
  • Second step Calculate the interference level IL of each available resource block of the CoMP user (ie, the resource block whose flag of the serving cell SerCell is "not updated").
  • the interference level IL of the mth resource block is calculated by the following formula:
  • I(k) is the power of the interference signal of the coordinated cell k received by the CoMP user.
  • the third step calculating a coordination cost factor corresponding to each available resource block of the CoMP user (ie, a resource block whose flag of the serving cell SerCell is "not updated").
  • the coordination cost factor can be calculated by changing the number of resource blocks N_change(m).
  • the Mchange(k) is the kth coordinated cell of the CoMP user needs to change the number of resources.
  • the number of changed resources Mchange(k) needs to be calculated as follows:
  • Mchange(k) takes the set standard value, which is set to 0 in this embodiment.
  • Mchange(k) takes ⁇ ; wherein ⁇ is a positive number less than one;
  • Mchange(k) takes u; where u is a positive number greater than one.
  • a resource block of a CoMP user if the resource block in the resource pre-allocation map of the coordinated cell is a "backup resource" (that is, the resource block is also used as a circumvention resource in the previous cycle, the cell is generally not scheduled).
  • the resource block when calculating the coordination cost factor, takes a smaller factor, so that the CoMP user tends to occupy the resource block; if the resource block in the resource pre-allocation map of the coordinated cell is “CoMP UE resource” (ie, In the previous cycle, the resource block is a resource block of a CoMP user of the cell, and when the coordination cost factor is calculated, a larger factor is taken, so that the CoMP user tends not to occupy the resource block; In the resource pre-allocation diagram, the resource block is a “normal resource” (that is, the resource block is a general resource of the cell in the previous cycle, and is used to schedule a non-CoMP user non-CoMP user (ie, a UE that does not need coordination of other cells)). When the coordination cost factor is calculated this time, a moderate factor is taken, so that the CoMP user has a moderate tendency to occupy the resource block.
  • RBGs For a CoMP UE of a serving cell, four RBGs, such as RBG1, RBG2, RBG3, and RBG4, are available resources in the Serving Cell.
  • the interfering cells of the CoMP user are Cell1, Cell 2, and Cell 3. Its resource type distribution is shown in Figure 3.
  • the current status is:
  • RBG1 of Cell 1 to Cell 3 is "updated”: RBG1 of Cell 1 has been updated to CoMP UE resources, and Cell 2, Cell 3 has been updated to backup resources;
  • the fourth step prioritize the resource blocks that the CoMP user can use according to the interference level quantities IL_RBG and N_change on each available resource block.
  • Step 5 Determine the number of resources used by the CoMP user according to the number of resource blocks required by the CoMP user and the upper limit of the total number of CoMP UE resources of the CoMP user serving cell.
  • the number of resources used by the CoMP user in this step is:
  • Min (the number of resource blocks required by the CoMP user, and the number of remaining "CoMP UE resources")
  • the current number of "CoMP resources” is equal to the upper limit of the total number of “CoMP UE resources” of the CoMP user serving cell, and the current resource allocation map of the CoMP user serving cell is "CoMP UE resource” and the flag is "updated”. The sum of the number of resource blocks.
  • Step 6 According to the resource block number used by the CoMP user, occupy the corresponding resource block according to the resource block priority order of the fourth step, and update the resource pre-allocation map.
  • the operation of updating the resource pre-allocation map is: for the resource blocks i determined by the CoMP user to be updated, the properties of the resource blocks i of the serving cell of the CoMP user are updated to "CoMP UE resources" and the flag is updated to "updated” For these resource blocks i in the coordinated cell of the CoMP user, the properties of the resource blocks whose flags are not updated in these resource blocks i are updated to "backup resources” and the flag is updated to "updated”.
  • the resource pre-allocation map obtained in the sixth step is as shown in FIG. 4 . That is, for the resource block RBG 2 that the CoMP user determines to occupy, the property of the resource block RBG 2 of the serving cell of the CoMP user is updated to "CoMP UE resource” and the flag is updated to "updated", and the CoMP user is The nature of the resource block RBG 2 of the "common resource” in the coordinated cell is updated to "backup resource” and the flag is updated to "updated", and the resource block RBG 2 of the CoMP UE resource in the CoMP user's coordinated cell is "CoMP UE resource". The nature remains the same. The flag of the resource block RBG 2 whose nature is "backup resource” and flag is not updated in the coordinated cell of the CoMP user is updated to be updated.
  • Step 7 Repeat steps 2 to 6 above for each CoMP user until the number of CoMP user resources in each cell reaches the upper limit or the CoMP user has already performed resource pre-allocation.
  • Step 8 Update the resource pre-allocation map.
  • the properties of all the resource blocks whose flags are “not updated” in the resource pre-allocation map of each cell are updated to "general resources", and the flag is updated to "updated”.
  • the CoMP user in the third step is the last CoMP user who needs to allocate resources, and for the CoMP user, in the sixth step, it is determined to use the resource block RBG 2, then the last updated resource pre-allocation map is as shown in FIG. 5.
  • Step 9 The centralized controller sends a resource pre-allocation map to each cell.
  • Each cell performs scheduling on the common UE and the CoMP user according to the resource pre-allocation map, and performs resource evasion on the CoMP users of other cells that need to be coordinated.
  • the invention can continuously update the resource pre-allocation map on the basis of each resource pre-allocation graph, and gradually approach the optimal resource pre-allocation effect, that is, occupying as few backup resources as possible and serving more CoMP users.
  • the invention can meet the throughput requirement of the CoMP user, and can only occupy less backup resources and improve the resource utilization of the system.
  • An embodiment of the present invention provides a device for inter-cell cooperation in an LTE system, where the device is a centralized controller. As shown in FIG. 6, the device includes:
  • the obtaining module 610 is configured to obtain a resource pre-allocation map of each cell in the cooperation area, where the resource pre-distribution map identifies the nature and status of each resource block of the cell, and the properties of the resource block include: CoMP UE resources The normal resource and the backup resource; the status of the resource block is identified as unallocated;
  • the available resource determining module 620 is configured to select a CoMP user among the CoMP users, and determine a resource block that can be used by the CoMP user according to the resource pre-allocation map of the serving cell.
  • the resource selection module 630 is configured to determine, according to the nature and state of the resource block of the coordinated cell of the CoMP user, the interference level of each available resource block by the coordinated cell resource block, and determine the coordination cost generated by selecting each available resource block. And selecting, among each available resource block, a resource block with a low interference level and a small coordination cost as a resource block to be occupied by the CoMP user;
  • the update module 640 is configured to update the nature of the selected resource block in the resource pre-allocation map of the serving cell to the CoMP UE resource, update the status to the allocated, and use the resource pre-allocation map of each coordinated cell.
  • the nature of the same resource block of the selected resource block is updated to the backup resource, and the status is updated to be allocated;
  • the iterative module 650 is configured to select a next CoMP user among the CoMP users, and trigger the available resource determining module based on the resource pre-allocation map of each currently updated cell until the set termination condition is met;
  • the cooperation control module 660 is configured to send the resource pre-allocation map of each cell that is updated when the termination condition is reached to the corresponding cell, and perform cooperative control of each cell.
  • the acquiring module 610 is specifically configured to detect whether there is a resource pre-allocation map of the previous period in each cell, and if yes, obtain a resource pre-allocation map of the cell in the previous period, and if not, the cell is in the cell An initial resource pre-allocation map is created; the nature of each resource block in the initial resource pre-allocation graph is identified as a common resource.
  • the available resource determining module 620 is specifically configured to determine that all resource block states in the resource pre-allocation map of the serving cell of the selected CoMP user are unallocated resource blocks, which are resources that can be used by the CoMP user. Piece.
  • the resource selection module 630 further includes:
  • a sorting sub-module configured to prioritize each available resource block according to a set sorting policy based on a level of interference of each available resource block by the coordinated cell resource block and a coordination cost generated by selecting each available resource block Ordering
  • the resource block selection sub-module is configured to select, according to the priority order, the resource blocks to be occupied by the CoMP user in each available resource block.
  • the resource selection module 630 further includes:
  • An interference level calculation submodule configured to determine, for each available resource block in the serving cell, a property and a state of a resource block in the coordinated cell that is the same as the available resource block; and determine a resource block that the CoMP user is determined to be determined
  • the nature of the CoMP UE resource is the power and value of the interference signal of each coordinated cell that is allocated, and the interference level of the available resource block interfered by each coordinated cell is obtained;
  • the coordination cost calculation sub-module is configured to allocate, according to each of the available resource blocks in the serving cell, an unallocated common resource value ⁇ , an unallocated backup resource value less than ⁇ , and an unallocated CoMP UE resource value greater than ⁇ . And assigning the allocated resource value to the set standard value, assigning the same resource block in the coordinated cell to the available resource block, and obtaining the sum of the resource block assignment values of each coordinated cell, and obtaining the The coordination cost of the resource block used; wherein the assignment of the unallocated common resource, the backup resource, and the CoMP UE resource is greater than the standard value.
  • the interference level of each available resource block in the serving cell obtained by the interference level calculation sub-module is interfered by each coordinated cell.
  • n is the number of coordinated cells
  • I(k) is the power of the interference signal of the coordinated cell k received by the selected CoMP user.
  • the coordination cost generated by each resource block in the selected serving cell obtained by the coordination cost calculation sub-module is
  • Mchange(k) takes the set standard value
  • Mchange(k) takes ⁇ ; wherein ⁇ is less than ⁇ ;
  • Mchange(k) takes u; where u is greater than ⁇ .
  • the resource selection module 630 determines whether the number of resource blocks required by the CoMP user reaches the upper limit of the total number of CoMP UE resources of the serving cell before selecting the resource in the available resources. And determining, according to the determined number of resources, the number of the remaining CoMP UE resources is the number of resources used by the CoMP user; otherwise, determining the number of resource blocks required by the CoMP user is the number of resources used by the CoMP user; A resource block having a low mutual interference with a resource block of the coordinated cell among the available resource blocks is a resource block to be occupied by the CoMP user.
  • the termination conditions set in the iteration module 650 include: The number of CoMP user resources in each cell in the collaboration area reaches the upper limit or the CoMP users have already pre-allocated resources.
  • the cooperation control module 660 is specifically configured to update all the resources in the resource pre-allocation map of each cell that are updated when the termination condition is reached to the unallocated resource block to the normal resource and state. All are updated to have been allocated, and the updated resource pre-allocation map of each cell is sent to the corresponding cell.
  • the calculation sub-module may be a controller in a device that cooperates between cells in an LTE system (such as a Central Processing Unit (CPU), a Micro Control Unit (MCU), and a Digital Signal Processor (DSP). Or a programmable logic array (FPGA, Field-Programmable Gate Array) implementation.
  • CPU Central Processing Unit
  • MCU Micro Control Unit
  • DSP Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • the embodiment of the present invention further provides a cell in an LTE system, where the cell is a cell in a collaboration area, as shown in FIG.
  • the receiving module 710 is configured to receive a resource pre-allocation map of the current cell.
  • the scheduling module 720 is configured to perform resource scheduling according to the resource allocation situation of the resource pre-allocation map.
  • the resource scheduling includes: using the CoMP UE resources allocated in the resource pre-allocation map to schedule CoMP users, The backup resources allocated in the resource pre-allocation map are not scheduled, and the non-CoMP users are scheduled by using the remaining resources in the resource pre-allocation map.
  • the receiving module 710 can be implemented by a transceiver of a cell in an LTE system
  • the scheduling module 720 can be implemented by a processor (such as a CPU, an MCU, a DSP, or an FPGA) in a cell in the LTE system.
  • the device of the present invention can be more effectively solved for CoMP users, small
  • the problem of interval cooperation and interference coordination achieves the effects of improving frequency efficiency and cell throughput.
  • the invention can continuously update the resource pre-allocation map on the basis of each resource pre-allocation graph, and gradually approach the optimal resource pre-allocation effect, that is, occupying as few backup resources as possible and serving more CoMP users.
  • the invention can occupy the backup resources as little as possible and improve the resource utilization of the system under the requirement of the throughput of the CoMP user.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a 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.
  • an embodiment of the present invention further provides a computer storage medium, the computer storage medium comprising a set of instructions, when executed, causing at least one processor to perform the method of inter-cell cooperation in the LTE system.
  • the solution provided by the embodiment of the present invention continuously updates the resource pre-allocation map on the basis of each resource pre-allocation graph, and gradually approaches the optimal resource pre-allocation effect, that is, occupies as few backup resources as possible, and serves more services. CoMP users.
  • the solution provided by the embodiment of the present invention can occupy the backup resource as little as possible and improve the resource utilization rate of the system when the throughput requirement of the CoMP user is met.

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

Abstract

L'invention concerne un procédé et un dispositif de coordination entre cellules dans un système LTE, et un support de stockage informatique. Le procédé comprend les étapes consistants à : obtenir un graphique de pré-attribution de ressources de cellules ; sélectionner un utilisateur CoMP, et déterminer, selon le graphique de pré-attribution de ressources d'une cellule de desserte de l'utilisateur CoMP, des blocs de ressources disponibles pour l'utilisateur CoMP ; sélectionner, à partir des blocs de ressources disponibles, un bloc de ressources sur lequel l'interférence de cellules de coordination est faible et le coût de coordination est faible en tant que bloc de ressources devant être occupé par l'utilisateur CoMP ; mettre à jour les graphiques de pré-attribution de ressources de la cellule de desserte et des cellules de coordination ; sélectionner un utilisateur CoMP suivant, répéter le processus sur la base des graphiques de pré-attribution de ressources mis à jour actuels des cellules jusqu'à ce qu'un état de terminaison défini soit satisfait, et fournir les graphiques de pré-attribution de ressources des cellules aux cellules pour une commande de coordination.
PCT/CN2017/071601 2016-03-10 2017-01-18 Procédé et dispositif de coordination entre cellules dans un système lte, et support de stockage informatique WO2017152719A1 (fr)

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