WO2019095705A1 - 一种小区间干扰协调方法及网络设备 - Google Patents

一种小区间干扰协调方法及网络设备 Download PDF

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Publication number
WO2019095705A1
WO2019095705A1 PCT/CN2018/094712 CN2018094712W WO2019095705A1 WO 2019095705 A1 WO2019095705 A1 WO 2019095705A1 CN 2018094712 W CN2018094712 W CN 2018094712W WO 2019095705 A1 WO2019095705 A1 WO 2019095705A1
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Prior art keywords
user
prb
edge
candidate
cell
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PCT/CN2018/094712
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English (en)
French (fr)
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申如意
林敏�
王晨
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京信通信系统（中国）有限公司
京信通信系统（广州）有限公司
京信通信技术(广州)有限公司
天津京信通信系统有限公司
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Publication of WO2019095705A1 publication Critical patent/WO2019095705A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to an inter-cell interference coordination method and a network device.
  • Inter-cell interference is the main interference problem faced by mobile communication systems using the same-frequency networking technology. For example, after the introduction of the same-frequency networking technology in the Long Term Evolution (LTE) system, adjacent cells There is a problem of inter-cell interference between them. Inter-cell interference affects the communication quality of the uplink and downlink. In particular, cell edge users are more susceptible to significant interference, resulting in reduced edge user throughput performance and reduced user experience.
  • LTE Long Term Evolution
  • Inter Cell Interference Coordination mainly involves the key technology points of edge band division.
  • the edge frequency band is fixed.
  • the user service rate is getting higher and higher, and the required resource blocks (RBs) are dynamically changing.
  • the fixed edge band cannot follow Adjusting the RB requirements of the central and edge users will result in insufficient or waste of resources for the central and/or edge users, affecting the spectrum efficiency of the system and the user experience.
  • the embodiment of the present application provides an inter-cell interference coordination method and a network device, so as to solve the problem that the fixed edge band of the prior art cannot be adjusted according to the RB requirements of the center and edge users, and the resource allocation of the center user and the edge user is unreasonable. problem.
  • An embodiment of the present application provides an inter-cell interference coordination method, in which a network device acquires a physical resource block PRB evaluation value of each user of multiple users accessing a first cell, and a PRB number and each actually scheduled by each user.
  • Measurement information of each user the PRB evaluation value of each user is the minimum number of PRBs satisfying the quality of service of each user; the measurement information includes channel signal quality and/or location information;
  • the first cell is a cell in the cell serving the network device a cell;
  • the network device determines a candidate edge user and a candidate center user from the plurality of users according to the measurement information of each user;
  • the candidate center user is a user other than the candidate edge user in the first cell; and the network device is based on the candidate edge user
  • the edge band value of the first cell is adjusted according to any one or any combination of the corresponding PRB ratio, the PRB ratio corresponding to the central user, and the PRB utilization rate of the central user; the PRB ratio corresponding to the candidate edge user and the PR
  • the network device adjusts an edge band value of the first cell according to any one or any combination of a PRB ratio corresponding to the candidate edge user, a PRB ratio corresponding to the central user, and a PRB utilization rate corresponding to the central user, including: After the device determines that the PRB usage of the central user is greater than the first threshold, and the PRB ratio of the central user is greater than the PRB ratio of the candidate edge user, the edge band value of the first cell is adjusted to the first edge band value; The band value is obtained by:
  • P1 is the first edge band value
  • W is the maximum edge band value supported by the first cell
  • X is the sum of the PRB evaluation values of each candidate edge user
  • Y is the PRB ratio corresponding to the center user.
  • the network device adjusts an edge band value of the first cell according to any one or any combination of a PRB ratio of the candidate edge user, a PRB ratio corresponding to the central user, and a PRB utilization rate of the central user, including: The network device determines that the PRB usage of the central user is less than or equal to the first threshold, or if the network device determines that the PRB usage corresponding to the central user is greater than the first threshold, and the PRB ratio corresponding to the central user is less than or equal to the PRB corresponding to the candidate edge user. The ratio is adjusted to the edge frequency band value of the first cell to the second edge band value; the second edge band value is obtained by:
  • P2 is the second edge band value
  • W is the maximum edge band value supported by the first cell
  • Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
  • the method further includes: determining, by the network device, the PRB evaluation value of each candidate edge user, and the priority of the candidate edge user, the adjusted edge band value, from the candidate edge user and The target edge user and the target center user are determined among the candidate center users.
  • the network device determines the target edge user and the target center user from the candidate edge user and the candidate center user according to the PRB evaluation value of each candidate edge user, and the priority of the candidate edge user and the adjusted edge band value.
  • the network device determines, according to the priority of the candidate edge user, the candidate edge user of the top i position as the target edge user, wherein the sum of the PRB evaluation values of the candidate edge users of the top i+1 position is greater than the adjusted edge.
  • the band value, and the sum of the PRB evaluation values of the candidate edge users of the top i bits is less than or equal to the adjusted edge band value, i is an integer greater than or equal to 1; the priority of the candidate edge user is based on the measurement information of the candidate edge user Obtained; the network device uses the candidate center user and the candidate edge user other than the target edge user determined above as the target center user.
  • An embodiment of the present invention provides a network device, where the network device includes: a receiving unit, configured to acquire a PRB evaluation value of a physical resource block of each user of multiple users accessing the first cell, and a number of PRBs actually scheduled by each user.
  • the PRB evaluation value of each user is the minimum number of PRBs satisfying the quality of service of each user; the measurement information includes channel signal quality and/or location information; and the first cell is in a cell serving the network device Any one of the cells; a processing unit, configured to determine a candidate edge user and a candidate center user from the plurality of users according to the measurement information of each user; the candidate center user is a user other than the candidate edge user in the first cell; a unit, configured to adjust an edge band value of the first cell according to any one or any combination of a PRB ratio corresponding to the candidate edge user, a PRB ratio corresponding to the central user, and a PRB utilization rate corresponding to the central user; The PRB ratio and the PRB ratio corresponding to the central user are respectively based on the corresponding user's total PRB evaluation value and the total actual scheduled PRB. An amount obtained; PRB center corresponding to the user utilization of the total number of PRB is the number of total PRB actually scheduled users and a first central cells obtained
  • the adjusting unit is specifically configured to: after determining that the PRB usage of the central user is greater than the first threshold, and adjusting the PRB ratio of the central user to be greater than the PRB ratio of the candidate edge user, adjusting the edge band value of the first cell
  • the first edge band value; the first edge band value is obtained by:
  • P1 is the first edge band value
  • W is the maximum edge band value supported by the first cell
  • X is the sum of the PRB evaluation values of each candidate edge user
  • Y is the PRB ratio corresponding to the center user.
  • the adjusting unit is specifically configured to: if it is determined that the PRB utilization rate of the central user is less than or equal to the first threshold, or if the PRB utilization rate corresponding to the central user is greater than the first threshold, and the PRB ratio corresponding to the central user is smaller than Or equal to the PRB ratio corresponding to the candidate edge user, the edge band value of the first cell is adjusted to the second edge band value; the second edge band value is obtained by:
  • P2 is the second edge band value
  • W is the maximum edge band value supported by the first cell
  • Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
  • the adjusting unit is further configured to: according to the PRB evaluation value of each candidate edge user, and the priority of the candidate edge user, the adjusted edge band value, from the candidate edge
  • the target edge user and the target center user are determined among the user and the candidate center user.
  • the adjusting unit is specifically configured to determine, according to the priority of the candidate edge user, the candidate edge user of the top i position as the target edge user, where the PRB evaluation value of the candidate edge user of the top i+1 position The sum is greater than the adjusted edge band value, and the sum of the PRB evaluation values of the candidate edge users of the top i position is less than or equal to the adjusted edge band value, i is an integer greater than or equal to 1; the priority of the candidate edge user is Obtained according to the measurement information of the candidate edge user; the candidate center user and the candidate edge user other than the target edge user determined above are used as the target center user.
  • the network device obtains a physical resource block (PRB) evaluation value of each user of multiple users accessing the first cell, and a PRB quantity actually scheduled by each user, and multiple users from multiple users.
  • PRB physical resource block
  • the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the central user, and the PRB utilization rate of the central user are obtained according to the PRB evaluation value of each user and the number of PRBs actually scheduled by each user. Further, the network device adjusts the edge band of the first cell based on the above values.
  • the network device adjusts the edge band of the first cell according to the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the center user, and the PRB utilization rate corresponding to the center user, so that the edge band can change according to the user's demand. Therefore, the edge band resource can be reasonably divided, and the problem that the central user and the edge user resource allocation are unreasonable and the system spectrum efficiency is low due to the fixed edge band in the prior art can be effectively avoided, thereby ensuring the central user and the edge user resource. Demand to improve the overall performance of the system.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for coordinating inter-cell interference according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a method for determining an edge user attribute in inter-cell interference coordination according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention.
  • the network architecture includes a network device 101; and a base station of at least one cell connected to the network device 101, such as the base station 1021, the base station 1022 shown in FIG. 1, and a user residing in the cell,
  • the user 1031, the user 1032, the user 1033, and the user 1034 shown in FIG. The user 1031 and the user 1032 are users of a cell camping on the base station 1021, and the user 1033 and the user 1034 are users of a cell camping on the base station 1022.
  • the network device may be a network element or a server, and is used to manage the base stations of all the cells to which it is connected (ie, the base station 1021 and the base station 1022).
  • the connection between the network device and the base station may be a wireless connection.
  • the base station may be a device deployed in the radio access network to provide wireless communication functions, such as a radio network controller (RNC), an evolved NodeB (eNB), and the like.
  • RNC radio network controller
  • eNB evolved NodeB
  • the user can reside in the cell where the base station is located, and the user can wirelessly communicate with the base station through voice and/or data connectivity devices (eg, mobile phones, computers, tablets, wearable devices).
  • the network device 101 can acquire PRB information and measurement information of each user residing in the corresponding cell from the base station 1021 and the base station 1022 in real time or according to a set period.
  • the preferred network device acquires PRB information and measurement information of each user from the base station according to a set period.
  • the PRB information of each user includes a PRB evaluation value of each user, and a PRB quantity actually scheduled by each user; the measurement information of each user includes signal quality and/or location information of each user.
  • FIG. 2 exemplarily shows a schematic flowchart of an inter-cell interference coordination method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 201 The network device acquires the PRB evaluation value of each user in the first cell, the number of PRBs actually scheduled by each user, and the measurement information of each user.
  • Step 202 The network device determines a candidate edge user and a candidate center user from the plurality of users according to the measurement information of each user; the candidate center user is a user other than the candidate edge user in the first cell;
  • Step 203 The network device adjusts an edge band value of the first cell according to any one or any combination of a PRB ratio corresponding to the candidate edge user, a PRB ratio corresponding to the central user, and a PRB utilization rate corresponding to the central user.
  • the ratio of the PRB and the PRB ratio of the central user are obtained according to the total PRB evaluation value of the corresponding user and the total number of actually scheduled PRBs.
  • the PRB utilization rate of the central user is based on the total number of PRBs actually scheduled by the central user.
  • the total number of PRBs of the first cell is obtained; the central user refers to the central user determined when the last cell of the first cell is adjusted.
  • the network device adjusts the edge frequency band of the first cell according to the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the central user, and the PRB utilization rate of the central user, so that the edge frequency band can change according to the user's needs.
  • the change so that the edge band resources can be reasonably divided, effectively avoiding the problem that the central user and the edge user resources are unreasonably allocated due to the fixed edge band in the prior art, and the system spectrum efficiency is low, thereby ensuring the central user and the edge user.
  • the demand for resources improves the overall performance of the system.
  • the network device may obtain, from a base station of the cell, a PRB evaluation value of each user accessing the cell, a number of PRBs actually scheduled by each user, and each user in a set period. Measurement information.
  • the PRB evaluation value of each user is the minimum number of PRBs that satisfy the quality of service of each user; the measurement information of each user includes signal quality and/or location information, and considering the large number of users, each user's measurement information is Differently, in order to avoid the complexity of data processing, in the present invention, the signal quality can be represented by the reference signal receiving power (RSRP) strength of the signal, and the location information can be divided according to the distance between the user and the base station.
  • RSRP reference signal receiving power
  • the distance between the user and the base station is divided into the first level in the range of (0, 200), and the distance between the user and the base station is (200,800) is divided into the second level, and the distance between the user and the base station is divided into the third level in the range of (800, 1000), thereby effectively simplifying the distance between the user and the base station.
  • Table 1 the information table obtained for the network device.
  • Table 1 Information table obtained by network equipment
  • the network device may determine candidate edge users from multiple users according to the channel quality of each user, or may use multiple location information according to each user.
  • the candidate edge user is determined by the user, and the candidate edge user is determined from the plurality of users according to the channel quality and the location information of each user, which is not limited.
  • the candidate central user is a user other than the candidate edge user in the first cell.
  • the network device obtains the PRB ratio corresponding to the candidate edge user according to the total PRB evaluation value of the candidate edge user and the total number of PRBs that are actually scheduled by the candidate edge user. Specifically, the network device compares the sum of the PRB evaluation values of the candidate edge users and the number of PRBs actually scheduled by the candidate edge users according to the determined candidate edge users, and the PRB evaluation value of each user and the number of PRBs actually scheduled by each user. The ratio of the sum is taken as the PRB ratio corresponding to the candidate edge user.
  • the network device acquires 20 users accessing the cell A from the base station of the cell A according to the set period, wherein, according to the channel quality and/or the location information, it is determined that 9 users belong to the candidate edge users (respectively users A, user B, user C, user D, user E, user F, user G, user H, and user I), and according to the PRB evaluation value of each user acquired in step 201 and the PRB actually scheduled by each user
  • the number of the PRB evaluation values of the nine candidate edge users and the number of PRBs actually scheduled, and the sum of the PRB evaluation values of the nine candidate edge users and the actual number of PRBs of the nine candidate edge users are obtained.
  • the corresponding PRB ratio of the nine candidate edge users can be obtained. As shown in Table 2, an example of a PRB ratio corresponding to a candidate edge user.
  • the network device obtains the PRB ratio corresponding to the central user according to the total PRB evaluation value of the central user and the total number of PRBs actually scheduled by the central user; and the number of PRBs and the first cell that the network device actually schedules according to the central user.
  • the total number of PRBs is obtained by PRB.
  • the candidate edge users determined according to the channel quality and the location information may have such a situation, for example, the user X is a candidate.
  • the edge user is in a mobile state. Therefore, when the network device acquires the information of each user in step 201, the user X may be the center user, that is, the candidate edge user may include the center user.
  • the network device compares the ratio of the sum of the PRB evaluation values of the central user to the sum of the PRBs actually scheduled by the center as the PRB ratio corresponding to the central user; and the sum of the number of PRBs actually scheduled by the center and the total number of PRBs of the cell.
  • the ratio is the PRB utilization rate corresponding to the central user.
  • the network device obtains 20 users accessing cell A from the base station of the cell A according to the set period.
  • the total number of PRBs in the cell A is 100, and 14 of the users belong to the central user (user A, respectively).
  • the PRB evaluation value of each user and the number of PRBs actually scheduled by each user can obtain the respective PRB evaluation values of the 14 waiting center users and the actual scheduled PRB number, and then according to the sum of the PRB evaluation values of the 14 central users.
  • the sum of the actual number of PRBs of the 14 central users can obtain the corresponding PRB ratio of the 14 central users, and the sum of the number of PRBs actually scheduled according to the 14 central users and the total number of PRBs of the cell can be obtained.
  • the corresponding PRB utilization of these 14 central users As shown in Table 3, an example of the PRB ratio and PRB utilization corresponding to the central user.
  • Table 3 Examples of PRB ratios and PRB utilization corresponding to central users
  • the network device adjusts the edge band value of the first cell according to any one or any combination of the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the central user, and the PRB utilization corresponding to the central user, because the candidate edge user
  • the corresponding PRB ratio, the PRB ratio corresponding to the central user, and the PRB utilization rate corresponding to the central user will change according to the user's demand. Therefore, the edge band value of the first cell will also change according to the user's demand. And change.
  • the PRB ratio corresponding to different candidate edge users, the PRB ratio corresponding to the central user, and the PRB utilization rate corresponding to the central user the following possible scenarios are listed.
  • the edge band value of the first cell is adjusted to the first edge band value.
  • the first edge band value is obtained by:
  • P1 is the first edge band value
  • W is the maximum edge band value supported by the first cell
  • X is the sum of the PRB evaluation values of each candidate edge user
  • Y is the PRB ratio corresponding to the center user.
  • the first threshold may be a threshold value (maximum value) of the central user PRB utilization rate, and the specific value of the first threshold is not limited by the present invention, and those skilled in the art may Experience the situation to set.
  • the network device acquires 20 users accessing the cell A from the base station of the cell A according to the set period, wherein the number of the central users is 14, and the number of candidate edge users is 9, and the cell A is known to be supported.
  • the maximum edge band value (that is, the number of maximum edge PRBs supported by cell A) is 30, the sum of PRB evaluation values of 9 candidate edge users is 24, and the corresponding PRB ratio of 9 candidate edge users is 0.827, 14
  • the corresponding PRB ratio of the center user is 1.178, the corresponding PRB utilization rate of the 14 central users is 73%, and the network device presets the first threshold value to be 70%.
  • the edge band value of cell A can be obtained by:
  • P1 is the edge band value of cell A
  • W1 is the maximum edge band value supported by cell A
  • X is the sum of the PRB evaluation values of each candidate edge user in cell A
  • Y is the PRB ratio corresponding to the central user in cell A.
  • the edge band value of the cell A is 20 PRBs.
  • the resource requirements of the central user and the edge user are dynamically changed.
  • the traffic volume of the edge user needs to be considered at the same time, that is, the present invention determines the central user.
  • the corresponding PRB usage is greater than the first threshold, and the PRB ratio corresponding to the central user is greater than the PRB ratio of the candidate edge user, indicating that the central user has a higher traffic volume and the central user's PRB utilization is higher, thereby adopting the candidate edge user.
  • the minimum required PRB evaluation value is used to adjust the edge band value to ensure the resource requirements of the center users while improving the total service quality of the system while satisfying the resource requirements of the edge users.
  • the network device determines that the PRB usage of the central user is less than or equal to the first threshold, or if the network device determines that the PRB usage of the central user is greater than the first threshold, and the PRB ratio of the central user is less than or equal to the PRB ratio of the candidate edge user,
  • the edge band value of the first cell is adjusted to a second edge band value.
  • the second edge band value is obtained by:
  • P2 is the second edge band value
  • W is the maximum edge band value supported by the first cell
  • Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
  • the network device may determine that the PRB usage of the central user is less than or equal to the first threshold; or the network device determines that the PRB usage of the central user is greater than the first threshold, and the PRB ratio of the central user is corresponding.
  • the network device determines that the PRB utilization rate of the central user is less than or equal to the first threshold, and adjusts the edge frequency band value of the first cell to the second edge frequency band value.
  • the network device acquires 25 users accessing the cell B from the base station of the cell B according to the set period, wherein the number of the central users is 17, and the number of candidate edge users is 11, and the known cell B
  • the maximum supported edge band value (that is, the number of maximum edge PRBs supported by cell B) is 35, and the sum of the number of actually scheduled PRBs of 11 candidate edge users is 36, and the corresponding PRB utilization rate of 17 central users is 68%
  • the network device preset first threshold is 70%.
  • the corresponding PRB utilization rate (68%) of the central user is less than the first threshold (70%), whereby the edge band value of the cell B can be obtained by:
  • P2 is the second edge band value
  • W2 is the maximum edge band value supported by the cell B
  • Z1 is the sum of the number of PRBs actually scheduled by each candidate edge user in the cell B.
  • the edge band value of the cell B is 35 PRBs.
  • the number of PRBs that are actually scheduled by the candidate edge user of the present invention adjusts the edge frequency band, and can meet the resource requirements of the central user while ensuring the resource requirements of the edge users and improve the service quality of the edge users.
  • the network device determines that the PRB usage of the central user is greater than the first threshold, and the PRB ratio corresponding to the central user is less than or equal to the PRB ratio of the candidate edge user, and adjusts the edge frequency band value of the first cell to the second edge frequency band value.
  • the network device acquires 30 users accessing the cell C from the base station of the cell C according to the set period, wherein the number of the central users is 18, the number of candidate edge users is 14, and the cell C is known.
  • the maximum supported edge band value (that is, the number of maximum edge PRBs supported by cell C) is 40, and the sum of the number of actually scheduled PRBs of 14 candidate edge users is 38, and the corresponding PRB ratio of 14 candidate edge users is In 0.912, the corresponding PRB ratio of the 18 central users is 0.879, the corresponding PRB utilization rate of the 18 central users is 69%, and the network device presets the first threshold to be 70%.
  • the edge band value of cell C can be obtained by:
  • P3 is the second edge band value
  • W3 is the maximum edge band value supported by the cell C
  • Z2 is the sum of the number of PRBs actually scheduled by each candidate edge user in the cell C.
  • the edge band value of the cell C is 38 PRBs.
  • the actual demand resource of the edge user may be higher than the resource actually required by the central user, that is, the present invention determines that the PRB utilization rate corresponding to the central user is greater than the first.
  • the threshold considering that the PRB ratio corresponding to the central user is less than or equal to the PRB ratio corresponding to the candidate edge user, the appropriate method is adopted to adjust the edge band value, and the requirements of the central user and the edge user resources are ensured as much as possible, and the system is upgraded. Overall performance.
  • the present invention considers the key technology of the edge band division in the ICIC technology, and there is also a problem of determining the edge user attribute.
  • the attributes of the edge user are mainly determined according to the channel quality and/or location information of the user.
  • the method is likely to lead to more edge users, and thus it is prone to the situation that the edge band resources cannot meet the needs of the edge users. Therefore, the present invention further provides a method for determining an edge user attribute in inter-cell interference coordination after the network device adjusts the edge frequency band of the first cell.
  • FIG. 3 is a schematic flowchart showing a method for determining an edge user attribute in inter-cell interference coordination according to the present invention. As shown in FIG. 3, the method includes the following steps:
  • Step 301 The network device acquires the PRB evaluation value of each candidate edge user, and the priority of the candidate edge user and the adjusted edge band value.
  • the priority of the candidate edge user is obtained according to the measurement information of the candidate edge user.
  • Step 302 The network device determines, according to the priority of the candidate edge user, the candidate edge user of the top i position as the target edge user, where the sum of the PRB evaluation values of the candidate edge users of the top i+1 position is greater than the adjusted The edge band value, and the sum of the PRB evaluation values of the candidate edge users of the top i bits is less than or equal to the adjusted edge band value, i is an integer greater than or equal to 1; the network device selects candidates other than the target edge users determined above Central users and candidate edge users as target center users;
  • the network device determines the target edge user according to the PRB evaluation value of each candidate edge user, the priority of the candidate edge user, and the adjusted edge band value, which can effectively avoid the edge users in the prior art.
  • the problem of the edge user's service needs cannot be met, thereby ensuring the business needs of the edge users and improving the service quality of the edge users.
  • the network device may obtain the priority of the candidate edge user in multiple manners.
  • One possible implementation manner is that the network device determines the priority of the candidate edge user according to the measurement information of each candidate edge user. For example, the network device may determine the preset priority according to the signal quality of each candidate edge user (such as the RSRP value) according to the RSRP value; or may determine the level of the location information according to the location information of each candidate edge user. The priority level can also be determined by considering the channel quality and location information of each candidate edge user. As shown in Table 4, as an example of ranking of candidate edge users, taking 9 candidate edge users as an example, according to the RSRP strength of the 9 candidate edge users, the priority of the candidate edge users is determined, and the 9 candidates are selected. Edge users are ranked.
  • Table 4 Example of ranking of candidate edge users
  • the network device collects the sum of the PRB evaluation values of the candidate edge users of the top i position according to the ranking of the candidate edge users, and if the sum of the PRB evaluation values of the candidate edge users of the top i position is less than or equal to the adjusted The edge band value, and the sum of the PRB evaluation values of the candidate i9-bit candidate edge users is greater than the adjusted edge band value, determining that the candidate edge user of the top i-bit is the target edge user. Further, the remaining users in the cell except the i target edge users are target center users, where i is an integer greater than or equal to 1.
  • the target edge user in addition to the PRB evaluation value of the candidate edge user, the target edge user may be determined according to the sum of the number of PRBs actually scheduled by the candidate edge user.
  • the specific implementation is similar to the step 303, and details are not described herein again.
  • the following describes the process by using the network device to determine the target edge user according to the PRB evaluation value of the candidate edge user.
  • the adjusted edge band value of the cell A is 20
  • the ranking of the candidate edge users is 20
  • the PRB evaluation values of the respective edge users are as shown in Table 5.
  • Table 5 Examples of candidate edge users' rankings and PRB evaluation values
  • the sum of the PRB evaluation values of the top 8 candidate edge users is 22, and it can be seen that the sum of the PRB evaluation values of the top 8 candidate edge users (22) is greater than the adjusted edge band value. (20); and the sum of the PRB evaluation values of the top 7 candidate edge users is 18, and the sum of the PRB evaluation values of the top 7 candidate edge users (18) is smaller than the adjusted edge band value (20), then
  • the top 7 candidate edge users are determined as target edge users, that is, user B, user G, user I, user C, user E, user F, and user H are target edge users, and the cell has the above 7 target edges.
  • the remaining 13 users other than the user are target center users.
  • FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device 400 includes a receiving unit 401, a processing unit 402, and an adjusting unit 403.
  • the receiving unit 401 is configured to obtain a PRB evaluation value for accessing each user in the first cell, a number of PRBs actually scheduled by each user, and measurement information of each user; each user's PRB evaluation value satisfies each The minimum number of PRBs of the user's quality of service; the measurement information includes signal quality and/or location information; the first cell is any one of the cells served by the network device coverage; the processing unit 402 is configured to use the measurement information of each user, Determining a candidate edge user and a candidate center user from the plurality of users; the candidate center user is a user other than the candidate edge user in the first cell; the adjusting unit 403 is configured to: according to the PRB ratio corresponding to the candidate edge user, and the corresponding Adjusting the edge band value of the first cell according to any one or any combination of the PRB ratio and the PRB utilization rate of the central user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the center user are respectively according to the corresponding user total PRB
  • the adjusting unit 403 is specifically configured to: after determining that the PRB usage of the central user is greater than the first threshold, and adjusting the PRB ratio of the central user to be greater than the PRB ratio of the candidate edge user, adjusting the edge band value of the first cell
  • the first edge band value; the first edge band value is obtained by:
  • P1 is the first edge band value
  • W is the maximum edge band value supported by the first cell
  • X is the sum of the PRB evaluation values of each candidate edge user
  • Y is the PRB ratio corresponding to the center user.
  • the adjusting unit 403 is specifically configured to: if it is determined that the PRB usage of the central user is less than or equal to the first threshold, or if the PRB utilization rate corresponding to the central user is greater than the first threshold, and the PRB ratio of the central user is less than Or equal to the PRB ratio corresponding to the candidate edge user, the edge band value of the first cell is adjusted to the second edge band value; the second edge band value is obtained by:
  • P2 is the second edge band value
  • W is the maximum edge band value supported by the first cell
  • Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
  • the adjusting unit 403 is further configured to: according to the PRB evaluation value of each candidate edge user, and the priority of the candidate edge user, the adjusted edge band value, from the candidate edge
  • the target edge user and the target center user are determined among the user and the candidate center user.
  • the adjusting unit 403 is specifically configured to determine, according to the priority of the candidate edge user, the candidate edge user of the top i position as the target edge user, where the PRB evaluation value of the candidate edge user of the top i+1 position The sum is greater than the adjusted edge band value, and the sum of the PRB evaluation values of the candidate edge users of the top i position is less than or equal to the adjusted edge band value, i is an integer greater than or equal to 1; the priority of the candidate edge user is Obtained according to the measurement information of the candidate edge user; the candidate center user and the candidate edge user other than the target edge user determined above are used as the target center user.
  • the network device obtains a physical resource block (PRB) evaluation value of each user of multiple users accessing the first cell, and a PRB quantity actually scheduled by each user, and multiple users from multiple users.
  • PRB physical resource block
  • the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the central user, and the PRB utilization rate of the central user are obtained according to the PRB evaluation value of each user and the number of PRBs actually scheduled by each user. Further, the network device adjusts the edge band of the first cell based on the above values.
  • the network device adjusts the edge band of the first cell according to the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the center user, and the PRB utilization rate corresponding to the center user, so that the edge band can change according to the user's demand. Therefore, the edge band resource can be reasonably divided, and the problem that the central user and the edge user resource allocation are unreasonable and the system spectrum efficiency is low due to the fixed edge band in the prior art can be effectively avoided, thereby ensuring the central user and the edge user resource. Demand to improve the overall performance of the system.
  • 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, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present application. Based on the same concept, the embodiment of the present application provides a network device 500 for performing any one of the foregoing methods.
  • the network device 500 includes a processor 501, a transceiver 502, a memory 503, and a communication interface 504; wherein the processor 501, the transceiver 502, the memory 503, and the communication interface 504 are connected to one another via a bus 505.
  • the bus 505 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 5, but it does not mean that there is only one bus or one type of bus.
  • the memory 503 may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
  • RAM random-access memory
  • non-volatile memory such as a flash memory.
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 503 may also include a combination of the above types of memories.
  • the communication interface 504 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface.
  • the Ethernet interface can be an optical interface, an electrical interface, or a combination thereof.
  • the wireless communication interface can be a WLAN interface.
  • the processor 501 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor 501 may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • the memory 503 can also be used to store program instructions, and the processor 501 calls the program instructions stored in the memory 503 to perform one or more steps in the embodiment shown in the above scheme, or an optional implementation thereof.
  • the network device 500 implements the functions of the terminal device in the foregoing method.
  • the processor 501 is configured to: according to the instruction to perform the memory storage, and control the transceiver 502 to perform signal reception and signal transmission, when the processor 501 executes the instruction of the memory storage, the network device 500 is configured to: acquire, by the network device, access to the first cell.
  • the network device determines a candidate edge user and a candidate center user from among a plurality of users according to the measurement information of each user;
  • the central user is a user other than the candidate edge user in the first cell; the network device adjusts according to any one or any combination of the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the central user, and the PRB utilization rate corresponding to the central user.
  • the edge band value of the first cell; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are respectively obtained according to the total PRB evaluation value of the corresponding user and the total number of actually scheduled PRBs; the PRB utilization rate corresponding to the central user It is obtained according to the total number of PRBs actually scheduled by the central user and the total number of PRBs of the first cell;
  • the central user refers to the central user determined when the last cell frequency band adjustment of the first cell.
  • 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.

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Abstract

一种小区间干扰协调方法及网络设备，该方法包括：网络设备获取接入第一小区的多个用户中每个用户的物理资源块PRB评估值和每个用户实际调度的PRB数量，并根据每个用户的测量信息确定出候选边缘用户后，根据每个用户的PRB评估值和实际调度的PRB数量，得到候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率，进而，网络设备根据以上数值调整第一小区的边缘频带。

Description

一种小区间干扰协调方法及网络设备
本申请要求在2017年11月14日提交中国专利局、申请号为201711123053.2、发明名称为“一种小区间干扰协调方法及网络设备”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
本申请实施例涉及通信技术领域，尤其涉及一种小区间干扰协调方法及网络设备。
背景技术
小区间干扰(Inter Cell Interference，ICI)是采用同频组网技术的移动通信系统面临的主要干扰问题，例如，长期演进(Long Term Evolution，LTE)系统引入同频组网技术后，相邻小区之间出现小区间干扰的问题。小区间干扰会影响上行链路和下行链路的通信质量，特别是小区边缘用户更容易受显著干扰，导致边缘用户吞吐率性能减低，用户体验度下降。
目前，降低小区间干扰常采用的技术是小区间干扰协调(Inter Cell Interference Coordination，ICIC)技术，主要涉及边缘频带划分这一关键技术点。ICIC技术中边缘频带是固定不变的，但随着LTE网络的发展，用户业务速率越来越高，其需求的资源块(Resource Block，RB)是在动态变化的，固定的边缘频带不能随着中心和边缘用户的RB需求进行调整，将导致中心和/或边缘用户的资源不够或浪费，影响系统的频谱效率和用户的体验。
基于此，目前亟需一种小区间干扰协调方法，以解决现有技术固定的边缘频带不能随着中心和边缘用户的RB需求进行调整而导致中心用户和边缘用户资源分配不合理的技术问题。
发明内容
本申请实施例提供一种小区间干扰协调方法及网络设备，以解决现有技术固定的边缘频带不能随着中心和边缘用户的RB需求进行调整而导致中心用户和边缘用户资源分配不合理的技术问题。
本申请实施例提供一种小区间干扰协调方法，该方法中网络设备获取接入第一小区的多个用户中每个用户的物理资源块PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息；每个用户的PRB评估值为满足每个用户的服务质量的最小PRB数量；测量信息包括信道信号质量和/或位置信息；第一小区为网络设备服务的小区中的任一小区；网络设备根据每个用户的测量信息，从多个用户中确定出候选边缘用户和候选中心用户；候选中心用户为第一小区中除候选边缘用户以外的用户；网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值；候选边缘用户对应的PRB比值、中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；中心用户对应的PRB利用率是根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；中心用户指第一小区上一次边缘频带调整时确定的中心用户。
可选地，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值，包括：网络设备确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值大于候选边缘用户对应的PRB比值后，将第一小区的边缘频带值调整为第一边缘频带值；第一边缘频带值通过以下方式获得：
P1＝min(W，
Figure PCTCN2018094712-appb-000001
)
其中，P1为第一边缘频带值，W为第一小区支持的最大边缘频带值，X为各个候选边缘用户的PRB评估值之和，Y为中心用户对应的PRB比值。
可选地，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小 区的边缘频带值，包括：若网络设备确定中心用户对应的PRB利用率小于或等于第一阈值，或，若网络设备确定中心用户对应的PRB利用率大于第一阈值且中心用户对应的PRB比值小于或等于候选边缘用户对应的PRB比值，则将第一小区的边缘频带值调整为第二边缘频带值；第二边缘频带值通过以下方式获得：
P2＝min(W，Z)
其中，P2为第二边缘频带值，W为第一小区支持的最大边缘频带值，Z为各个候选边缘用户实际调度的PRB数量之和。
可选地，网络设备调整第一小区的边缘频带之后，还包括：网络设备根据各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值，从候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户。
可选地，网络设备根据各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值，从候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户，包括：网络设备根据候选边缘用户的优先级，将排名前i位的候选边缘用户确定为目标边缘用户，其中，排名前i+1位的候选边缘用户的PRB评估值之和大于调整后的边缘频带值，且排名前i位的候选边缘用户的PRB评估值之和小于或等于调整后的边缘频带值，i为大于等于1的整数；候选边缘用户的优先级是根据候选边缘用户的测量信息得到的；网络设备将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户。
本发明实施例提供一种网络设备，该网络设备包括：接收单元，用于获取接入第一小区的多个用户中每个用户的物理资源块PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息；每个用户的PRB评估值为满足每个用户的服务质量的最小PRB数量；测量信息包括信道信号质量和/或位置信息；第一小区为网络设备服务的小区中的任一小区；处理单元，用于根据每个用户的测量信息，从多个用户中确定出候选边缘用户和候选中心用户； 候选中心用户为第一小区中除候选边缘用户以外的用户；调整单元，用于根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值；候选边缘用户对应的PRB比值、中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；中心用户对应的PRB利用率是根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；中心用户指第一小区上一次边缘频带调整时确定的中心用户。
可选地，该调整单元具体用于：确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值大于候选边缘用户对应的PRB比值后，将第一小区的边缘频带值调整为第一边缘频带值；第一边缘频带值通过以下方式获得：
P1＝min(W，
Figure PCTCN2018094712-appb-000002
)
其中，P1为第一边缘频带值，W为第一小区支持的最大边缘频带值，X为各个候选边缘用户的PRB评估值之和，Y为中心用户对应的PRB比值。
可选地，该调整单元具体用于：若确定中心用户对应的PRB利用率小于或等于第一阈值，或，若确定中心用户对应的PRB利用率大于第一阈值且中心用户对应的PRB比值小于或等于候选边缘用户对应的PRB比值，则将第一小区的边缘频带值调整为第二边缘频带值；第二边缘频带值通过以下方式获得：
P2＝min(W，Z)
其中，P2为第二边缘频带值，W为第一小区支持的最大边缘频带值，Z为各个候选边缘用户实际调度的PRB数量之和。
可选地，该调整单元在调整第一小区的边缘频带值之后，还用于：根据各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值，从候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户。
可选地，该调整单元具体用于：根据候选边缘用户的优先级，将排名前i 位的候选边缘用户确定为目标边缘用户，其中，排名前i+1位的候选边缘用户的PRB评估值之和大于调整后的边缘频带值，且排名前i位的候选边缘用户的PRB评估值之和小于或等于调整后的边缘频带值，i为大于等于1的整数；候选边缘用户的优先级是根据候选边缘用户的测量信息得到的；将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户。
本申请实施例中，网络设备获取接入第一小区的多个用户中每个用户的物理资源块(Physical Resource Block，PRB)评估值和每个用户实际调度的PRB数量，并从多个用户中确定出候选边缘用户后，根据每个用户的PRB评估值和每个用户实际调度的PRB数量，得到候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率，进而，网络设备根据以上的数值调整第一小区的边缘频带。本发明中，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率调整第一小区的边缘频带，使得边缘频带可随着用户的需求的变化而变化，从而能够合理划分边缘频带资源，有效避免现有技术中由于固定的边缘频带而导致的中心用户和边缘用户资源分配不合理、系统频谱效率低的问题，进而能够保证中心用户和边缘用户资源的需求，提升系统的整体性能。
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。
图1为本申请实施例提供的一种网络架构示意图；
图2为本申请实施例提供的一种小区间干扰协调方法的流程示意图；
图3为本申请实施例提供的一种小区间干扰协调中边缘用户属性的确定方法的流程示意图；
图4为本申请实施例提供的一种网络设备的结构示意图；
图5为本申请实施例提供的一种网络设备的结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述，显然，所描述的实施例仅仅是本发明一部份实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
图1为本发明实施例适用的一种网络架构示意图。如图1所示，该网络架构包括网络设备101；以及与该网络设备101连接的至少一个小区的基站，例如图1中所示的基站1021、基站1022；以及驻留在小区内的用户，例如图1中所示出的用户1031、用户1032、用户1033、用户1034。其中，用户1031、用户1032为驻留在基站1021的小区的用户，用户1033、用户1034为驻留在基站1022的小区的用户。
本发明实施例中，网络设备可以为一个网元或服务器，用于管理其所连接的所有小区的基站(即基站1021、基站1022)，网络设备与基站之间的连接可以为无线连接。基站可以为一种部署在无线接入网用以提供无线通信功能的装置，例如无线网络控制器(radio network controller，RNC)，演进的节点B(evolved NodeB，eNB)等。用户可以驻留在基站所在的小区，用户可以通过语音和/或数据连通性的设备(例如移动电话、计算机、平板电脑、可穿戴设备)与基站进行无线通信。
网络设备101可以实时或按照设定周期从基站1021、基站1022处获取驻留在对应的小区内的每个用户的PRB信息和测量信息。为减少数据传输的负担，本发明实施例中优选网络设备按照设定周期从基站处获取每个用户的PRB信息和测量信息。其中，每个用户的PRB信息包括每个用户的PRB评估值、每个用户实际调度的PRB数量；每个用户的测量信息包括每个用户的信号质量和/或位置信息。
基于图1所示的网络架构，图2示例性示出了本发明实施例提供的一种小区间干扰协调方法的流程示意图，如图2所示，包括以下步骤：
步骤201，网络设备获取接入第一小区中每个用户的PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息；
步骤202，网络设备根据每个用户的测量信息，从多个用户中确定出候选边缘用户和候选中心用户；候选中心用户为第一小区中除候选边缘用户以外的用户；
步骤203，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值；候选边缘用户对应的PRB比值、中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；中心用户对应的PRB利用率是根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；中心用户指第一小区上一次边缘频带调整时确定的中心用户。
本申请实施例中，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率调整第一小区的边缘频带，使得边缘频带可随着用户的需求的变化而变化，从而能够合理划分边缘频带资源，有效避免现有技术中由于固定的边缘频带而导致的中心用户和边缘用户资源分配不合理、系统频谱效率低的问题，进而能够保证中心用户和边缘用户资源的需求，提升系统的整体性能。
具体来说，步骤201和步骤202中，网络设备可按设定周期从小区的基站处获取接入该小区的每个用户的PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息。其中，每个用户的PRB评估值为满足每个用户的服务质量的最小PRB数量；每个用户的测量信息包括信号质量和/或位置信息，考虑到用户数量庞大，每个用户的测量信息各有不同，为避免数据处理的复杂度，本发明中，信号质量可以用信号的参考信号接收功率(Reference Signal Receiving Power，RSRP)强度来表示，位置信息可根据用户与基站之间的距离划分为多个等级，例如，以基站覆盖范围为直径1000米为例，将用户与基站之间的距离在(0，200]这一范围内划分为第一等级，将用户与基站之间的 距离在(200，800]这一范围内划分为第二等级，将用户与基站之间的距离在(800，1000]这一范围内划分为第三等级，从而有效简化了用户与基站之间的距离。如表1所示，为网络设备所获取的信息表。
表1：网络设备所获取的信息表
Figure PCTCN2018094712-appb-000003
进一步地，本发明中，候选边缘用户的确定方式有多种，网络设备可以根据每个用户的信道质量从多个用户中确定出候选边缘用户，也可以根据每个用户的位置信息从多个用户中确定出候选边缘用户，还可以根据获每个用户的信道质量和位置信息，从多个用户中确定出候选边缘用户，具体不做限定。相应地，候选中心用户为第一小区中除候选边缘用户以外的用户。
步骤203中，网络设备根据候选边缘用户总的PRB评估值和候选边缘用户总的实际调度的PRB数量，得到候选边缘用户对应的PRB比值。具体地，网络设备根据确定出的候选边缘用户，以及每个用户的PRB评估值、每个用户实际调度的PRB数量，将候选边缘用户的PRB评估值之和与候选边缘用户实际调度的PRB数量之和的比值作为候选边缘用户对应的PRB比值。
举个例子，网络设备按照设定周期从小区A的基站处获取接入小区A的20个用户，其中，根据信道质量和/或位置信息确定出有9个用户属于候选边缘用户(分别为用户A、用户B、用户C、用户D、用户E、用户F、用户G、用户H和用户I)，且根据步骤201中获取到的每个用户的PRB评估值和每个用户实际调度的PRB数量，可以得到这9个候选边缘用户各自的PRB评估值和实际调度的PRB数量，进而根据这9个候选边缘用户的PRB评估值之和与这9个候选边缘用户的实际调度的PRB数量之和可以得到这9个候选边缘用户的对应的PRB比值。如表2所示，为候选边缘用户对应的PRB比值的示例。
表2：候选边缘用户对应的PRB比值的示例
Figure PCTCN2018094712-appb-000004
采用相同的方式，网络设备根据中心用户总的PRB评估值和中心用户总的实际调度的PRB数量，得到中心用户对应的PRB比值；网络设备根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量，得到PRB利用率。
需要说明的是，由于用户的位置可能会出现移动的情况，因此，在多个用户中，根据信道质量和位置信息确定出的候选边缘用户，可能存在这样一种情况，例如，用户X为候选边缘用户，但是，用户X处于移动状态，因此，网络设备在步骤201中获取各个用户的信息时，用户X可能为中心用户，也就是说，候选边缘用户中可能包括中心用户。
具体地，网络设备将中心用户的PRB评估值之和与中心实际调度的PRB数量之和的比值作为中心用户对应的PRB比值；将中心实际调度的PRB数量之和与该小区总的PRB数量的比值作为中心用户对应的PRB利用率。
举个例子，网络设备按照设定周期从小区A的基站处获取接入小区A的20个用户，小区A总的PRB数量为100个，其中，有14个用户属于中心用户(分别为用户A、用户C、用户D、用户G、用户I、用户J、用户K、用户L、用户M、用户N、用户O、用户P、用户Q和用户R)，且根据步骤201中获取到的每个用户的PRB评估值和每个用户实际调度的PRB数量，可以得到这14个候中心用户各自的PRB评估值和实际调度的PRB数量，进而根据这14个中心用户的PRB评估值之和与这14个中心用户的实际调度的PRB数量之和可以得到这14个中心用户的对应的PRB比值，以及根据这14个中心用户的实际调度的PRB数量之和与该小区总的PRB数量可以得到这14个中 心用户的对应的PRB利用率。如表3所示，为中心用户对应的PRB比值和PRB利用率的示例。
表3：中心用户对应的PRB比值和PRB利用率的示例
Figure PCTCN2018094712-appb-000005
进一步地，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值，由于候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率这三个值会随着用户需求的变化而变化，因此，第一小区的边缘频带值也会随着用户需求的变化而变化。本发明实施例根据不同的候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率，具体列举出如下几种可能的情形。
情形一：
网络设备确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值大于候选边缘用户对应的PRB比值后，将第一小区的边缘频带值调整为第一边缘频带值。
第一边缘频带值通过以下方式获得：
P1＝min(W，
Figure PCTCN2018094712-appb-000006
)
其中，P1为第一边缘频带值，W为第一小区支持的最大边缘频带值，X为各个候选边缘用户的PRB评估值之和，Y为中心用户对应的PRB比值。
具体来说，本发明实施例中，第一阈值可以为中心用户PRB利用率的门限值(最大值)，本发明不对第一阈值的具体数值做限定，本领域技术人员可以根据实际情况或经验情况来设置。
下面结合具体例子对情形一进行说明。
例如，网络设备按照设定周期从小区A的基站处获取接入小区A的20个用户，其中，中心用户的数量为14个，候选边缘用户的数量为9个，且已知小区A支持的最大边缘频带值(即小区A支持的最大边缘PRB的数量)为30个，9个候选边缘用户的PRB评估值之和为24个，9个候选边缘用户的对应的PRB比值为0.827，14个中心用户的对应的PRB比值为1.178，14个中心用户的对应的PRB利用率为73％，网络设备预设第一阈值为70％。那么，中心用户的对应的PRB利用率(73％)大于第一阈值(70％)，且，中心用户的对应的PRB比值(1.178)大于候选边缘用户对应的PRB比值(0.827)，由此，小区A的边缘频带值可通过以下方式得到的：
P1＝min(W1，
Figure PCTCN2018094712-appb-000007
)
其中，P1为小区A的边缘频带值；W1为小区A支持的最大边缘频带值，X为小区A中各个候选边缘用户的PRB评估值之和，Y为小区A中中心用户对应的PRB比值。
那么，根据上述条件，可以通过计算得到：
P1＝min(30，
Figure PCTCN2018094712-appb-000008
)＝20；
即小区A的边缘频带值为20个PRB。
本申请实施例中，考虑到中心用户和边缘用户的资源需求是动态变化的，在中心用户高业务量的场景下，同时需要考虑边缘用户的业务量，也就是说，本发明通过确定中心用户对应的PRB利用率大于第一阈值，以及中心用户对应的PRB比值大于候选边缘用户对应的PRB比值，表明中心用户业务量较高，且中心用户的PRB利用率较高，从而采用候选边缘用户的最低需求的PRB评 估值来调整边缘频带值，在尽可能满足边缘用户的资源需求的同时，保证中心用户的资源需求，提升系统总的服务质量。
情形二：
网络设备确定中心用户对应的PRB利用率小于等于第一阈值，或，网络设备若确定中心用户对应的PRB利用率大于第一阈值且中心用户对应的PRB比值小于等于候选边缘用户对应的PRB比值，将第一小区的边缘频带值调整为第二边缘频带值。
第二边缘频带值通过以下方式获得：
P2＝min(W，Z)
其中，P2为第二边缘频带值，W为第一小区支持的最大边缘频带值，Z为各个候选边缘用户实际调度的PRB数量之和。
具体来说，情形二中可能出现网络设备确定中心用户对应的PRB利用率小于等于第一阈值的情况；或者网络设备确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值小于等于候选边缘用户对应的PRB比值的情况。因此，下面结合具体实例对情形二中可能出现的情况进行说明。
情况A，网络设备确定中心用户对应的PRB利用率小于等于第一阈值，将第一小区的边缘频带值调整为第二边缘频带值。
举个例子，网络设备按照设定周期从小区B的基站处获取接入小区B的25个用户，其中，中心用户的数量为17个，候选边缘用户的数量为11个，且已知小区B支持的最大边缘频带值(即小区B支持的最大边缘PRB的数量)为35个，11个候选边缘用户的实际调度的PRB数量之和为36个，17个中心用户的对应的PRB利用率为68％，网络设备预设第一阈值为70％。那么，中心用户的对应的PRB利用率(68％)小于第一阈值(70％)，由此，小区B的边缘频带值可通过以下方式得到的：
P2＝min(W2，Z1)
其中，P2为第二边缘频带值，W2为小区B支持的最大边缘频带值，Z1为小区B中各个候选边缘用户实际调度的PRB数量之和。
那么，根据上述条件，可以通过计算得到：
P2＝min(35，36)＝35；
即小区B的边缘频带值为35个PRB。
本申请实施例中，通过确定中心用户对应的PRB利用率小于第一阈值，能够表明中心用于业务量较低，即分配给中心用户的频带值过多从而出现中心频带浪费的现象，针对这类场景，本发明候选边缘用户实际调度的PRB数来调整边缘频带，能够在满足中心用户的资源需求的同时，保证边缘用户的资源需求，提升边缘用户的服务质量。
情况B，网络设备确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值小于等于候选边缘用户对应的PRB比值，将第一小区的边缘频带值调整为第二边缘频带值。
举个例子，网络设备按照设定周期从小区C的基站处获取接入小区C的30个用户，其中，中心用户的数量为18个，候选边缘用户的数量为14个，且已知小区C支持的最大边缘频带值(即小区C支持的最大边缘PRB的数量)为40个，14个候选边缘用户的实际调度的PRB数量之和为38个，14个候选边缘用户的对应的PRB比值为0.912，18个中心用户的对应的PRB比值为0.879，18个中心用户的对应的PRB利用率为69％，网络设备预设第一阈值为70％。那么，中心用户的对应的PRB利用率(69％)小于第一阈值(70％)，且，中心用户的对应的PRB比值(0.879)小于候选边缘用户对应的PRB比值(0.912)，由此，小区C的边缘频带值可通过以下方式得到的：
P3＝min(W3，Z2)
其中，P3为第二边缘频带值，W3为小区C支持的最大边缘频带值，Z2为小区C中各个候选边缘用户实际调度的PRB数量之和。
那么，根据上述条件，可以通过计算得到：
P3＝min(40，38)＝38；
即小区C的边缘频带值为38个PRB。
本发明中，考虑到中心用户高业务量的场景下，边缘用户的实际需求的 资源可能高于中心用户实际需求的资源，也就是说，本发明在确定中心用户对应的PRB利用率大于第一阈值的情况下，考虑到中心用户对应的PRB比值小于等于候选边缘用户对应的PRB比值的情况，从而采取合适的方式来调整边缘频带值，尽可能保证中心用户和边缘用户资源的需求，提升系统的整体性能。
本发明考虑到ICIC技术中，除了边缘频带划分这一关键技术，还存在边缘用户属性确定的问题，现有技术中边缘用户的属性主要根据用户的信道质量和/或位置信息来确定，采用这样的方式容易导致边缘用户较多，进而容易出现边缘频带资源不能满足边缘用户的需要的情况。因此，本发明在网络设备调整第一小区的边缘频带之后，还提供一种小区间干扰协调中边缘用户属性的确定方法。
图3示例性示出了本发明提供的一种小区间干扰协调中边缘用户属性的确定方法的流程示意图，如图3所示，包括以下步骤：
步骤301，网络设备获取各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值；候选边缘用户的优先级是根据候选边缘用户的测量信息得到的；
步骤302，网络设备根据候选边缘用户的优先级，将排名前i位的候选边缘用户确定为目标边缘用户，其中，排名前i+1位的候选边缘用户的PRB评估值之和大于调整后的边缘频带值，且排名前i位的候选边缘用户的PRB评估值之和小于或等于调整后的边缘频带值，i为大于等于1的整数；网络设备将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户；
本申请实施例中，网络设备根据各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值确定出目标边缘用户，能够有效避免现有技术中边缘用户较多导致无法满足边缘用户的业务需求的问题，从而保证边缘用户的业务需求，提升边缘用户的业务质量。
具体来说，步骤301中，网络设备获取候选边缘用户的优先级可以有多 种方式，一种可能的实现方式为，网络设备根据各个候选边缘用户的测量信息来确定候选边缘用户的优先级，例如，网络设备可以根据各个候选边缘用户的信号质量(如RSRP值)，按RSRP值的大小确定预设优先级的高低；也可以根据各个候选边缘用户的位置信息，按位置信息的等级高低确定优先级的高低；还可以综合考虑各个候选边缘用户的信道质量和位置信息来确定优先级。如表4所示，为候选边缘用户的排名示例，以9个候选边缘用户为例，根据这9个候选边缘用户的RSRP强度的高低，确定候选边缘用户的优先级，并对这9个候选边缘用户进行排名。
表4：候选边缘用户的排名示例
排名位置 用户名称
第1位 用户B
第2位 用户G
第3位 用户I
第4位 用户C
第5位 用户E
第6位 用户F
第7位 用户H
第8位 用户D
第9位 用户A
步骤302中，网络设备根据候选边缘用户的排名，统计排名前i位的候选边缘用户的PRB评估值之和，若排名前i位的候选边缘用户的PRB评估值之和小于或等于调整后的边缘频带值，且，排名前i+1位的候选边缘用户的PRB评估值之和大于调整后的边缘频带值，则确定排名前i位的候选边缘用户为目标边缘用户。进一步地，该小区中除了这i个目标边缘用户之外的其余用户为目标中心用户，其中，i为大于等于1的整数。
需要说明的是，本发明实施例中，除了统计候选边缘用户的PRB评估值外，还可以根据候选边缘用户实际调度的PRB数量之和来确定目标边缘用户。具体实现方式与步骤303类似，在此不再赘述。
下面以网络设备根据候选边缘用户的PRB评估值确定目标边缘用户为例，对上述过程进行说明。
例如，小区A调整后边缘频带值为20，候选边缘用户的排名以及各个边缘用户的PRB评估值如表5所示。
表5：候选边缘用户的排名及PRB评估值示例
排名 用户名称 PRB评估值
第1位 用户B 3
第2位 用户G 2
第3位 用户I 2
第4位 用户C 3
第5位 用户E 3
第6位 用户F 2
第7位 用户H 3
第8位 用户D 4
第9位 用户A 2
根据表5所示的内容，排名前8位的候选边缘用户的PRB评估值之和为22，可见，排名前8位的候选边缘用户的PRB评估值之和(22)大于调整后边缘频带值(20)；而排名前7位的候选边缘用户的PRB评估值之和为18，排名前7位的候选边缘用户的PRB评估值之和(18)小于调整后边缘频带值(20)，那么，将排名前7位的候选边缘用户确定为目标边缘用户，即用户B、用户G、用户I、用户C、用户E、用户F和用户H为目标边缘用户，该小区除以上7个目标边缘用户之外的其余13个用户为目标中心用户。
基于同样的发明构思，图4示出了本申请实施例提供的一种网络设备的结构示意图，如图4所示，该网络设备400包括接收单元401、处理单元402、调整单元403；
其中，接收单元401，用于获取接入第一小区中每个用户的PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息；每个用户的PRB评估值为满足每个用户的服务质量的最小PRB数量；测量信息包括信号质量和/或位置信息；第一小区为网络设备覆盖服务的小区中的任一小区；处理单元402，用于根据每个用户的测量信息，从多个用户中确定出候选边缘用户和候选中心用户；候选中心用户为第一小区中除候选边缘用户以外的用户；调整单元403，用于根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中 心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值；候选边缘用户对应的PRB比值、中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；中心用户对应的PRB利用率是根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；中心用户指第一小区上一次边缘频带调整时确定的中心用户。
可选地，调整单元403具体用于：确定中心用户对应的PRB利用率大于第一阈值，且中心用户对应的PRB比值大于候选边缘用户对应的PRB比值后，将第一小区的边缘频带值调整为第一边缘频带值；第一边缘频带值通过以下方式获得：
P1＝min(W，
Figure PCTCN2018094712-appb-000009
)
其中，P1为第一边缘频带值，W为第一小区支持的最大边缘频带值，X为各个候选边缘用户的PRB评估值之和，Y为中心用户对应的PRB比值。
可选地，调整单元403具体用于：若确定中心用户对应的PRB利用率小于或等于第一阈值，或，若确定中心用户对应的PRB利用率大于第一阈值且中心用户对应的PRB比值小于或等于候选边缘用户对应的PRB比值，则将第一小区的边缘频带值调整为第二边缘频带值；第二边缘频带值通过以下方式获得：
P2＝min(W，Z)
其中，P2为第二边缘频带值，W为第一小区支持的最大边缘频带值，Z为各个候选边缘用户实际调度的PRB数量之和。
可选地，调整单元403在调整第一小区的边缘频带值之后，还用于：根据各个候选边缘用户的PRB评估值，以及候选边缘用户的优先级、调整后的边缘频带值，从候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户。
可选地，调整单元403具体用于：根据候选边缘用户的优先级，将排名前i位的候选边缘用户确定为目标边缘用户，其中，排名前i+1位的候选边缘用户的PRB评估值之和大于调整后的边缘频带值，且排名前i位的候选边缘 用户的PRB评估值之和小于或等于调整后的边缘频带值，i为大于等于1的整数；候选边缘用户的优先级是根据候选边缘用户的测量信息得到的；将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户。
本申请实施例中，网络设备获取接入第一小区的多个用户中每个用户的物理资源块(Physical Resource Block，PRB)评估值和每个用户实际调度的PRB数量，并从多个用户中确定出候选边缘用户后，根据每个用户的PRB评估值和每个用户实际调度的PRB数量，得到候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率，进而，网络设备根据以上的数值调整第一小区的边缘频带。本发明中，网络设备根据候选边缘用户对应的PRB比值、中心用户对应的PRB比值和中心用户对应的PRB利用率调整第一小区的边缘频带，使得边缘频带可随着用户的需求的变化而变化，从而能够合理划分边缘频带资源，有效避免现有技术中由于固定的边缘频带而导致的中心用户和边缘用户资源分配不合理、系统频谱效率低的问题，进而能够保证中心用户和边缘用户资源的需求，提升系统的整体性能。
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、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
图5示例性示出了本申请实施例提供的一种网络设备的结构示意图。基于相同构思，本申请实施例提供一种网络设备500，用于执行上述方法中的任一个方案。如图5所示，网络设备500包括处理器501、收发器502、存储器503和通信接口504；其中，处理器501、收发器502、存储器503和通信接口504通过总线505相互连接。
总线505可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA) 总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图5中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
存储器503可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器503还可以包括上述种类的存储器的组合。
通信接口504可以为有线通信接入口，无线通信接口或其组合，其中，有线通信接口例如可以为以太网接口。以太网接口可以是光接口，电接口或其组合。无线通信接口可以为WLAN接口。
处理器501可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器501还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic,GAL)或其任意组合。
可选地，存储器503还可以用于存储程序指令，处理器501调用该存储器503中存储的程序指令，可以执行上述方案中所示实施例中的一个或多个步骤，或其中可选的实施方式，使得网络设备500实现上述方法中终端设备的功能。
处理器501用于根据执行存储器存储的指令，并控制收发器502进行信号接收和信号发送，当处理器501执行存储器存储的指令时，网络设备500用于：网络设备获取接入第一小区中每个用户的PRB评估值、每个用户实际调度的PRB数量和每个用户的测量信息；网络设备根据每个用户的测量信息，从多个用户中确定出候选边缘用户和候选中心用户；候选中心用户为第一小区中除候选边缘用户以外的用户；网络设备根据候选边缘用户对应的PRB比 值、中心用户对应的PRB比值和中心用户对应的PRB利用率中的任一项或任意组合，调整第一小区的边缘频带值；候选边缘用户对应的PRB比值、中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；中心用户对应的PRB利用率是根据中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；中心用户指第一小区上一次边缘频带调整时确定的中心用户。
本申请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。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
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 (13)

  1. 一种小区间干扰协调方法，其特征在于，所述方法包括：
    网络设备获取接入第一小区中每个用户的物理资源块PRB评估值、所述每个用户实际调度的PRB数量和所述每个用户的测量信息；所述每个用户的PRB评估值为满足所述每个用户的服务质量的最小PRB数量；所述测量信息包括信号质量和/或位置信息；所述第一小区为所述网络设备服务的小区中的任一小区；
    所述网络设备根据所述每个用户的测量信息，从所述多个用户中确定出候选边缘用户和候选中心用户；所述候选中心用户为所述第一小区中除所述候选边缘用户以外的用户；
    所述网络设备根据所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值和所述中心用户对应的PRB利用率中的任一项或任意组合，调整所述第一小区的边缘频带值；所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；所述中心用户对应的PRB利用率是根据所述中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；所述中心用户指所述第一小区上一次边缘频带调整时确定的中心用户。
  2. 如权利要求1所述的方法，其特征在于，所述网络设备根据所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值和所述中心用户对应的PRB利用率中的任一项或任意组合，调整所述第一小区的边缘频带值，包括：
    所述网络设备确定所述中心用户对应的PRB利用率大于第一阈值，且所述中心用户对应的PRB比值大于所述候选边缘用户对应的PRB比值后，将所述第一小区的边缘频带值调整为第一边缘频带值；
    所述第一边缘频带值通过以下方式获得：
    Figure PCTCN2018094712-appb-100001
    其中，P1为所述第一边缘频带值，W为第一小区支持的最大边缘频带值， X为各个所述候选边缘用户的PRB评估值之和，Y为所述中心用户对应的PRB比值。
  3. 如权利要求1所述的方法，其特征在于，所述网络设备根据所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值和所述中心用户对应的PRB利用率中的任一项或任意组合，调整所述第一小区的边缘频带值，包括：
    若所述网络设备确定所述中心用户对应的PRB利用率小于或等于所述第一阈值，或，若所述网络设备确定所述中心用户对应的PRB利用率大于所述第一阈值且所述中心用户对应的PRB比值小于或等于所述候选边缘用户对应的PRB比值，则将所述第一小区的边缘频带值调整为第二边缘频带值；
    所述第二边缘频带值通过以下方式获得：
    P2＝min(W，Z)
    其中，P2为所述第二边缘频带值，W为所述第一小区支持的最大边缘频带值，Z为各个所述候选边缘用户实际调度的PRB数量之和。
  4. 如权利要求1至3中任一项所述的方法，其特征在于，所述网络设备调整所述第一小区的边缘频带之后，还包括：
    所述网络设备根据各个所述候选边缘用户的PRB评估值，以及所述候选边缘用户的优先级、调整后的边缘频带值，从所述候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户。
  5. 如权利要求4所述的方法，其特征在于，所述网络设备根据各个所述候选边缘用户的PRB评估值，以及所述候选边缘用户的优先级、调整后的边缘频带值，从所述候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户，包括：
    所述网络设备根据所述候选边缘用户的优先级，将排名前i位的候选边缘用户确定为所述目标边缘用户，其中，所述排名前i+1位的候选边缘用户的PRB评估值之和大于所述调整后的边缘频带值，且排名前i位的候选边缘用户的PRB评估值之和小于或等于所述调整后的边缘频带值，i为大于等于1的整数；所述候选边缘用户的优先级是根据所述候选边缘用户的测量信息得到的；
    所述网络设备将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户。
  6. 一种网络设备，其特征在于，所述网络设备包括：
    接收单元，用于获取接入第一小区中每个用户的物理资源块PRB评估值、所述每个用户实际调度的PRB数量和所述每个用户的测量信息；所述每个用户的PRB评估值为满足所述每个用户的服务质量的最小PRB数量；所述测量信息包括信号质量和/或位置信息；所述第一小区为所述网络设备服务的小区中的任一小区；
    处理单元，用于根据所述每个用户的测量信息，从所述多个用户中确定出候选边缘用户和候选中心用户；所述候选中心用户为所述第一小区中除所述候选边缘用户以外的用户；
    调整单元，用于根据所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值和所述中心用户对应的PRB利用率中的任一项或任意组合，调整所述第一小区的边缘频带值；所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；所述中心用户对应的PRB利用率是根据所述中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；所述中心用户指所述第一小区上一次边缘频带调整时确定的中心用户。
  7. 如权利要求6所述的网络设备，其特征在于，所述调整单元具体用于：
    确定所述中心用户对应的PRB利用率大于第一阈值，且所述中心用户对应的PRB比值大于所述候选边缘用户对应的PRB比值后，将所述第一小区的边缘频带值调整为第一边缘频带值；
    所述第一边缘频带值通过以下方式获得：
    Figure PCTCN2018094712-appb-100002
    其中，P1为所述第一边缘频带值，W为第一小区支持的最大边缘频带值，X为各个所述候选边缘用户的PRB评估值之和，Y为所述中心用户对应的PRB比值。
  8. 如权利要求6所述的网络设备，其特征在于，所述调整单元具体用于：
    若确定所述中心用户对应的PRB利用率小于或等于所述第一阈值，或，若确定所述中心用户对应的PRB利用率大于所述第一阈值且所述中心用户对应的PRB比值小于或等于所述候选边缘用户对应的PRB比值，则将所述第一小区的边缘频带值调整为第二边缘频带值；
    所述第二边缘频带值通过以下方式获得：
    P2＝min(W，Z)
    其中，P2为所述第二边缘频带值，W为所述第一小区支持的最大边缘频带值，Z为各个所述候选边缘用户实际调度的PRB数量之和。
  9. 如权利要求6至8中任一项所述的网络设备，其特征在于，所述调整单元在调整所述第一小区的边缘频带值之后，还用于：
    根据各个所述候选边缘用户的PRB评估值，以及所述候选边缘用户的优先级、调整后的边缘频带值，从所述候选边缘用户和候选中心用户中确定出目标边缘用户和目标中心用户。
  10. 如权利要求9所述的网络设备，其特征在于，所述调整单元具体用于：
    根据所述候选边缘用户的优先级，将排名前i位的候选边缘用户确定为所述目标边缘用户，其中，所述排名前i+1位的候选边缘用户的PRB评估值之和大于所述调整后的边缘频带值，且排名前i位的候选边缘用户的PRB评估值之和小于或等于所述调整后的边缘频带值，i为大于等于1的整数；所述候选边缘用户的优先级是根据所述候选边缘用户的测量信息得到的；
    将上述确定的目标边缘用户之外的候选中心用户和候选边缘用户作为目标中心用户。
  11. 一种计算机可读存储介质，其特征在于，所述存储介质存储有指令，当所述指令在计算机上运行时，使得计算机实现执行权利要求1至5中任一项所述的方法。
  12. 一种计算机程序产品，其特征在于，所述计算机程序产品包括存储 在非暂态计算机可读存储介质上的计算程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行权利要求1～5任一所述方法。
  13. 一种网络设备，其特征在于，包括：
    处理器、存储器、收发机、总线接口，其中处理器、存储器与收发机之间通过总线接口连接；
    所述处理器获取接入第一小区中每个用户的物理资源块PRB评估值、所述每个用户实际调度的PRB数量和所述每个用户的测量信息；所述每个用户的PRB评估值为满足所述每个用户的服务质量的最小PRB数量；所述测量信息包括信号质量和/或位置信息；所述第一小区为所述网络设备服务的小区中的任一小区；
    所述处理器根据所述每个用户的测量信息，从所述多个用户中确定出候选边缘用户和候选中心用户；所述候选中心用户为所述第一小区中除所述候选边缘用户以外的用户；
    所述处理器根据所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值和所述中心用户对应的PRB利用率中的任一项或任意组合，调整所述第一小区的边缘频带值；所述候选边缘用户对应的PRB比值、所述中心用户对应的PRB比值分别根据对应的用户总的PRB评估值和总的实际调度的PRB数量得到的；所述中心用户对应的PRB利用率是根据所述中心用户总的实际调度的PRB数量和第一小区总的PRB数量得到的；所述中心用户指所述第一小区上一次边缘频带调整时确定的中心用户；
    所述存储器，用于存储一个或多个可执行程序，可以存储所述处理器在执行操作时所使用的数据；
    所述总线接口，用于提供接口。
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