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CN107947890B - A kind of inter-cell interference coordination method and the network equipment - Google Patents

A kind of inter-cell interference coordination method and the network equipment Download PDF

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Publication number
CN107947890B
CN107947890B CN201711123053.2A CN201711123053A CN107947890B CN 107947890 B CN107947890 B CN 107947890B CN 201711123053 A CN201711123053 A CN 201711123053A CN 107947890 B CN107947890 B CN 107947890B
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user
prb
edge
users
candidate
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CN107947890A (en
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申如意
林敏�
王晨
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Comba Telecom Technology Guangzhou Ltd
Comba Telecom Systems Guangzhou Co Ltd
Tianjin Comba Telecom Systems Co Ltd
Comba Network Systems Co Ltd
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Comba Telecom Technology Guangzhou Ltd
Comba Telecom Systems China Ltd
Comba Telecom Systems Guangzhou Co Ltd
Tianjin Comba Telecom Systems Co Ltd
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Publication of CN107947890A publication Critical patent/CN107947890A/en
Priority to PCT/CN2018/094712 priority patent/WO2019095705A1/en
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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

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

Abstract

The invention discloses a kind of inter-cell interference coordination method and the network equipments.This method comprises: the network equipment obtains the Physical Resource Block PRB assessed value of each user and the PRB quantity of each user's actual schedule in multiple users of access first community, and according to the metrical information of each user after determining candidate edge user in the multiple user, according to the PRB quantity of the PRB assessed value of each user and each user's actual schedule, obtain the corresponding PRB ratio of candidate edge user, the corresponding PRB ratio of central user and the corresponding PRB utilization rate of central user, in turn, the network equipment adjusts the edge band of first community according to above-described numerical value.The present invention realizes edge band and changes with the variation of user demand, so as to classifying rationally edge band resource, guarantees the demand of central user and edge customer resource, the overall performance of lifting system.

Description

Inter-cell interference coordination method and network equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for coordinating inter-cell interference and a network device.
Background
Inter-Cell Interference (ICI) is a major Interference problem faced by a mobile communication system using a common-frequency networking technology, for example, after a Long Term Evolution (LTE) system introduces the common-frequency networking technology, the Inter-Cell Interference between adjacent cells occurs. Inter-cell interference affects the communication quality of uplink and downlink, and especially cell edge users are more susceptible to significant interference, resulting in reduced throughput performance and reduced user experience of the edge users.
At present, a commonly used technique for reducing Inter-cell interference is an Inter Cell Interference Coordination (ICIC) technique, which mainly relates to a key technical point of edge frequency band division. In the ICIC technology, an edge frequency band is fixed and unchanged, but with the development of an LTE network, a user service rate is higher and higher, Resource Blocks (RBs) required by the user service rate are dynamically changed, and the fixed edge frequency band cannot be adjusted according to the RB requirements of a center user and an edge user, which may cause insufficient or wasted resources of the center user and/or the edge user, and affect the spectrum efficiency of the system and the user experience.
Based on this, there is a need for an inter-cell interference coordination method to solve the technical problem that the fixed edge frequency band in the prior art cannot be adjusted according to the RB requirements of the center and edge users, which results in unreasonable resource allocation for the center and edge users.
Disclosure of Invention
The embodiment of the invention provides an inter-cell interference coordination method and network equipment, which are used for solving the technical problem that the resource allocation of a central user and an edge user is unreasonable because a fixed edge frequency band in the prior art cannot be adjusted along with the RB requirements of the central user and the edge user.
The embodiment of the invention provides an inter-cell interference coordination method, which comprises the following steps:
the method comprises the steps that network equipment obtains a Physical Resource Block (PRB) evaluation value of each user in a plurality of users accessing a first cell, the number of PRBs actually scheduled by each user and measurement information of each user; the PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; the measurement information comprises channel signal quality and/or location information; the first cell is any one of cells served by the network equipment;
the network equipment determines candidate edge users and candidate center users from the plurality of users according to the measurement information of each user; the candidate center user is a user in the first cell except the candidate edge user; the network equipment adjusts the edge frequency band value of the first cell according to any one or any combination of the PRB ratio corresponding to the candidate edge users, the PRB ratio corresponding to the central user and the PRB utilization ratio corresponding to the central user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
Optionally, the adjusting, by the network device, 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 center user, and the PRB utilization ratio corresponding to the center user includes:
after the network device determines that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, the edge frequency band value of the first cell is adjusted to be a first edge frequency 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
Optionally, the adjusting, by the network device, 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 center user, and the PRB utilization ratio corresponding to the center user includes:
if the network device determines that the PRB utilization rate corresponding to the central user is less than or equal to the first threshold, or if the network device determines that 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 less than or equal to the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to a second edge band value;
the second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
Optionally, after the network device adjusts the edge frequency band of the first cell, the method further includes:
and the network equipment determines a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, the priorities of the candidate edge users and the adjusted edge frequency band value.
Optionally, the determining, by the network device, a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation values of the candidate edge users, the priorities of the candidate edge users, and the adjusted edge band values includes:
the network equipment determines the candidate edge users with i bits before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of the PRB evaluation values of the candidate edge users with i +1 bits before ranking is larger than the adjusted edge band value, the sum of the PRB evaluation values of the candidate edge users with i bits before ranking is smaller than or equal to the adjusted edge band value, and i is an integer larger than or equal to 1; the priority of the candidate edge user is obtained according to the measurement information of the candidate edge user;
and the network equipment takes the candidate central users and the candidate edge users except the determined target edge users as target central users.
An embodiment of the present invention provides a network device, where the network device includes:
a receiving unit, configured to obtain an evaluation value of a physical resource block PRB of each user of multiple users accessing a first cell, a number of actually scheduled PRBs of each user, and measurement information of each user; the PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; the measurement information comprises channel signal quality and/or location information; the first cell is any one of cells served by the network equipment;
the processing unit is used for determining candidate edge users and candidate center users from the plurality of users according to the measurement information of each user; the candidate center user is a user in the first cell except the candidate edge user;
an adjusting 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 center user, and a PRB utilization ratio corresponding to the center user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
Optionally, the adjusting unit is specifically configured to:
after determining that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to be a 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
Optionally, the adjusting unit is specifically configured to:
if it is determined that the PRB utilization rate corresponding to the center user is less than or equal to the first threshold, or if it is determined that the PRB utilization rate corresponding to the center user is greater than the first threshold and the PRB ratio corresponding to the center user is less than or equal to the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to a second edge band value;
the second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
Optionally, after adjusting the edge band value of the first cell, the adjusting unit is further configured to:
and determining a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, the priorities of the candidate edge users and the adjusted edge frequency band value.
Optionally, the adjusting unit is specifically configured to:
determining i candidate edge users before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of PRB evaluation values of the i +1 candidate edge users before ranking is greater than the adjusted edge band value, the sum of PRB evaluation values of the i candidate edge users before ranking is less than or equal to the adjusted edge band value, and 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;
and taking the candidate center users and the candidate edge users except the determined target edge users as target center users.
In the embodiment of the present invention, after a network device obtains an evaluation value of a Physical Resource Block (PRB) of each user of a plurality of users accessing a first cell and a number of actually scheduled PRBs of each user, and determines a candidate edge user from the plurality of users, a PRB ratio corresponding to the candidate edge user, a PRB ratio corresponding to a center user, and a PRB utilization ratio corresponding to the center user are obtained according to the evaluation value of the PRB of each user and the number of actually scheduled PRBs of each user, and then, the network device adjusts an edge band of the first cell according to the above numerical values. In the invention, the network equipment 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 ratio corresponding to the central user, so that the edge frequency band can change along with the change of the requirement of the user, thereby reasonably dividing the edge frequency band resource, effectively avoiding the problems of unreasonable resource allocation of the central user and the edge user and low system spectrum efficiency caused by the fixed edge frequency band in the prior art, further ensuring the requirement of the central user and the edge user resource and improving the overall performance of the system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a network architecture suitable for use in embodiments of the present invention;
fig. 2 is a flowchart illustrating a method for inter-cell interference coordination according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a method for determining an edge user attribute in inter-cell interference coordination according to the present invention;
fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of a network architecture applicable to the embodiment of the present invention. As shown in fig. 1, 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 base station 1021, base station 1022 shown in fig. 1; and users residing within the cell, e.g., user 1031, user 1032, user 1033, user 1034 shown in fig. 1. User 1031 and user 1032 are users residing in the cell of base station 1021, and user 1033 and user 1034 are users residing in the cell of base station 1022.
In this embodiment of the present invention, the network device may be a network element or a server, which is used to manage the base stations (i.e., base station 1021 and base station 1022) of all the cells connected to the network device, and the connection between the network device and the base stations may be a wireless connection. The base station may be a device deployed in a radio access network to provide a wireless communication function, such as a Radio Network Controller (RNC), an evolved node B (evolved NodeB, eNB), and the like. The user may reside in the cell in which the base station is located, the user may communicate wirelessly with the base station via voice and/or data connectivity devices (e.g., mobile phone, computer, tablet, wearable device),
the network device 101 may obtain PRB information and measurement information of each user camping in a corresponding cell from the base station 1021 and the base station 1022 in real time or according to a set period. In order to reduce the burden of data transmission, in the embodiment of the present invention, it is preferable that the 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 comprises a PRB evaluation value of each user and the number of PRBs actually scheduled by each user; the measurement information for each user includes signal quality and/or location information for each user.
Based on the network architecture shown in fig. 1, fig. 2 exemplarily shows a flowchart corresponding to a method for inter-cell interference coordination provided by the embodiment of the present invention, as shown in fig. 2, including the following steps:
step 201, a network device obtains a PRB evaluation value of each user accessed to a first cell, a number of actually scheduled PRBs of each user, and measurement information of each user.
Step 202, the network device determines candidate edge users and candidate center users from the plurality of users according to the measurement information of each user; the candidate center user is a user in the first cell except the candidate edge user.
Step 203, 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 ratio corresponding to the central user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
In the invention, the network equipment 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 ratio corresponding to the central user, so that the edge frequency band can change along with the change of the requirement of the user, thereby reasonably dividing the edge frequency band resource, effectively avoiding the problems of unreasonable resource allocation of the central user and the edge user and low system spectrum efficiency caused by the fixed edge frequency band in the prior art, further ensuring the requirement of the central user and the edge user resource and improving the overall performance of the system.
Specifically, in step 201 and step 202, the network device may acquire the PRB evaluation value of each user accessing the cell, the number of actually scheduled PRBs of each user, and the measurement information of each user from the base station of the cell in a set period. The PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; in order to avoid the complexity of data processing, in the present invention, the Signal quality may be represented by Reference Signal Receiving Power (RSRP) strength of a Signal, the location information may be divided into a plurality of levels according to the distance between the user and the base station, for example, taking a base station coverage as an example of 1000 meters in diameter, the distance between the user and the base station is divided into a first level within a range of (0, 200], the distance between the user and the base station is divided into a second level within a range of (200, 800], and the distance between the user and the base station is divided into a third level within a range of (800, 1000], thereby effectively simplifying the distance between the user and the base station, as shown in table 1, an information table obtained for the network device.
Table 1: information table acquired by network equipment
Further, in the present invention, there are various determination manners of the candidate edge users, and the network device may determine the candidate edge users from the multiple users according to the channel quality of each user, may also determine the candidate edge users from the multiple users according to the location information of each user, and may also determine the candidate edge users from the multiple users according to the channel quality and the location information of each user, which is not limited specifically. Correspondingly, the candidate center user is a user in the first cell except the candidate edge user.
In step 203, the network device obtains a PRB ratio corresponding to the candidate edge user according to the total PRB evaluation value of the candidate edge user and the total actually scheduled PRB number of the candidate edge user. Specifically, according to the determined candidate edge users, the PRB evaluation value of each user and the number of PRBs actually scheduled by each user, the network device takes the ratio of the sum of the PRB evaluation values of the candidate edge users to the sum of the PRBs actually scheduled by the candidate edge users as the PRB ratio corresponding to the candidate edge users.
For example, the network device obtains 20 users accessing the cell a from the base station of the cell a according to a set period, wherein 9 users are determined to belong to candidate edge users (respectively, user a, user B, user C, user D, user E, user F, user G, user H, and user I) according to the channel quality and/or the location information, and according to the PRB evaluation value of each user and the actually scheduled PRB number of each user obtained in step 201, the respective PRB evaluation value and the actually scheduled PRB number of the 9 candidate edge users can be obtained, and further, according to the sum of the PRB evaluation values of the 9 candidate edge users and the actually scheduled PRB number of the 9 candidate edge users, the corresponding PRB ratio of the 9 candidate edge users can be obtained. As shown in table 2, it is an example of PRB ratio corresponding to the candidate edge users.
Table 2: example of PRB ratios corresponding to candidate edge users
In the same way, the network equipment obtains the PRB ratio corresponding to the central user according to the total PRB evaluation value of the central user and the total PRB number actually scheduled by the central user; and the network equipment obtains the PRB utilization rate according to the total PRB number actually scheduled by the central user and the total PRB number of the first cell.
It should be noted that, because the position of the user may move, there may be a case where, among the multiple users, the candidate edge user determined according to the channel quality and the position information is a candidate edge user, for example, the user X is a candidate edge user, but the user X is in a moving state, so when the network device acquires the information of each user in step 201, the user X may be a center user, that is, the candidate edge user may include a center user.
Specifically, the network device takes the ratio of the sum of the PRB evaluation values of the central user to the sum of the number of PRBs actually scheduled by the center as the PRB ratio corresponding to the central user; taking the ratio of the sum of the PRB number actually scheduled by the center to the total PRB number of the cell as the PRB utilization rate corresponding to the center user
For example, the network device obtains 20 users accessing the cell a from the base station of the cell a according to a set period, and the total number of PRBs of the cell a is 100, wherein 14 users belong to a central user (respectively, user a, user C, user D, user G, user I, user J, user K, user L, user M, user N, user O, user P, user Q, and user R), and according to the evaluation value of PRB of each user and the number of actually scheduled PRB of each user obtained in step 201, the respective evaluation values of PRB and the number of actually scheduled PRB of the 14 candidate central users can be obtained, and further according to the sum of the evaluation values of PRB of the 14 central users and the sum of the actually scheduled PRB of the 14 central users, the corresponding PRB ratio of the 14 central users can be obtained, and according to the sum of the actually scheduled PRB of the 14 central users and the total number of PRB of the cell, the corresponding PRB of the 14 central users can be obtained Utilization ratio. As shown in table 3, there are examples of PRB ratio and PRB utilization corresponding to the central user.
Table 3: example of PRB ratio and PRB utilization for a Central user
Further, 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 center user, and the PRB utilization ratio corresponding to the center user, and because the three values of the PRB ratio corresponding to the candidate edge user, the PRB ratio corresponding to the center user, and the PRB utilization ratio corresponding to the center user may change with the change of the user requirement, the edge band value of the first cell may also change with the change of the user requirement. According to the PRB ratios corresponding to different candidate edge users, the PRB ratio corresponding to the center user and the PRB utilization rate corresponding to the center user, the following possible situations are specifically listed.
The first situation is as follows:
and after the network equipment determines that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, adjusting the edge frequency band value of the first cell to be a first edge frequency 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
Specifically, in the embodiment of the present invention, the first threshold may be a threshold (maximum) of the PRB utilization of the central user, and the present invention does not limit a specific numerical value of the first threshold, and a person skilled in the art may set the first threshold according to an actual situation or an empirical situation.
Case one will be described below with reference to a specific example.
For example, the network device obtains 20 users accessing the cell a from the base station of the cell a according to a set period, where the number of center users is 14, the number of candidate edge users is 9, and it is known that the maximum edge band value supported by the cell a (i.e., the number of maximum edge PRBs supported by the cell a) is 30, the sum of the PRB evaluation values of the 9 candidate edge users is 24, the corresponding PRB ratio of the 9 candidate edge users is 0.827, the corresponding PRB ratio of the 14 center users is 1.178, the corresponding PRB utilization of the 14 center users is 73%, and the network device presets the first threshold as 70%. Then, the corresponding PRB utilization (73%) of the center user is greater than the first threshold (70%), and the corresponding PRB ratio (1.178) of the center user is greater than the PRB ratio (0.827) of the candidate edge user, so the edge-band value of cell a can be obtained by:
wherein, P1 is the edge band value of cell a; w1 is the maximum edge band value supported by the cell a, X is the sum of the PRB evaluation values of each candidate edge user in the cell a, and Y is the PRB ratio corresponding to the central user in the cell a.
Then, according to the above conditions, it is possible to obtain by calculation:
i.e. the edge-band value of cell a is 20 PRBs.
In the invention, the resource requirements of a central user and an edge user are considered to be dynamically changed, and the service quantity of the edge user needs to be considered under the scene of high service quantity of the central user, namely, the invention indicates that the service quantity of the central user is higher and the PRB utilization ratio of the central user is higher by determining that the PRB utilization ratio corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, so that the edge frequency band value is adjusted by adopting the PRB evaluation value with the lowest requirement of the candidate edge user, the resource requirements of the central user are ensured while the resource requirements of the edge user are met as much as possible, and the total service quality of the system is improved.
Case two:
and the network equipment determines that the PRB utilization rate corresponding to the central user is less than or equal to a first threshold, or if the network equipment determines that 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 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 be a second edge band value.
The second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
Specifically, in case two, a situation that the network device determines that the utilization rate of the PRB corresponding to the central user is less than or equal to a first threshold may occur; or the network device determines that the PRB utilization rate corresponding to the central user is greater than a first threshold, and the PRB ratio corresponding to the central user is less than or equal to the PRB ratio corresponding to the candidate edge user. Therefore, the case that may occur in case two is explained below with reference to specific examples.
In case a, the network device determines that the PRB utilization rate corresponding to the central user is less than or equal to a first threshold, and adjusts the edge band value of the first cell to a second edge band value.
For example, the network device obtains 25 users accessing the cell B from the base station of the cell B according to a set period, where the number of center users is 17, the number of candidate edge users is 11, and it is known that the maximum edge band value supported by the cell B (i.e., the number of maximum edge PRBs supported by the cell B) is 35, the sum of the actually scheduled PRBs of the 11 candidate edge users is 36, the corresponding PRB utilization rate of the 17 center users is 68%, and the network device presets the first threshold value as 70%. Then, the corresponding PRB utilization (68%) for the center user is less than the first threshold (70%), and thus the edge-band value for cell B can be obtained by:
P2＝min(W2，Z1)
wherein P2 is the second edge band value, W2 is the maximum edge band value supported by cell B, and Z1 is the sum of the number of PRBs actually scheduled by each candidate edge user in cell B.
Then, according to the above conditions, it is possible to obtain by calculation:
P2＝min(35，36)＝35；
i.e. the edge-band value of cell B is 35 PRBs.
In the invention, the PRB utilization rate corresponding to the central user is determined to be smaller than the first threshold value, which can indicate that the traffic volume of the center is low, namely the frequency band value allocated to the central user is too much, so that the phenomenon of central frequency band waste occurs.
In case B, the network device determines that the PRB utilization rate corresponding to the central user is greater than a first threshold, and the PRB ratio corresponding to the central user is less than or equal to the PRB ratio corresponding to the candidate edge user, and adjusts the edge band value of the first cell to a second edge band value.
For example, the network device obtains 30 users accessing the cell C from the base station of the cell C according to a set period, where the number of center users is 18, the number of candidate edge users is 14, and it is known that the maximum edge band value supported by the cell C (i.e., the number of maximum edge PRBs supported by the cell C) is 40, the sum of the actually scheduled PRBs of the 14 candidate edge users is 38, the corresponding PRB ratio of the 14 candidate edge users is 0.912, the corresponding PRB ratio of the 18 center users is 0.879, the corresponding PRB utilization of the 18 center users is 69, and the network device presets the first threshold as 70%. Then, the corresponding PRB utilization (69%) of the center user is smaller than the first threshold (70%), and the corresponding PRB ratio (0.879) of the center user is smaller than the corresponding PRB ratio (0.912) of the candidate edge user, so the edge-band value of cell C can be obtained by:
P3＝min(W3，Z2)
wherein P3 is the second edge band value, W3 is the maximum edge band value supported by cell C, and Z2 is the sum of the number of PRBs actually scheduled by each candidate edge user in cell C.
Then, according to the above conditions, it is possible to obtain by calculation:
P3＝min(40，38)＝38；
i.e. the edge band value of cell C is 38 PRBs.
In the invention, under the condition that the high traffic of the central user is considered, the actually required resources of the edge user are possibly higher than the actually required resources of the central user, that is, under the condition that the PRB utilization rate corresponding to the central user is determined to be larger than the first threshold value, the invention considers that the PRB ratio corresponding to the central user is smaller than or equal to the PRB ratio corresponding to the candidate edge user, thereby adopting a proper mode to adjust the edge frequency band value, ensuring the requirements of the central user and the edge user resources as much as possible and improving the overall performance of the system.
In the ICIC technology, the problem of determining the attribute of the edge user exists besides the key technology of edge frequency band division, the attribute of the edge user in the prior art is mainly determined according to the channel quality and/or the position information of the user, and the edge user is easily caused to be more by adopting the mode, so that the situation that the edge frequency band resource cannot meet the requirement of the edge user easily occurs. Therefore, the present invention further provides a method for determining an edge user attribute in inter-cell interference coordination after a network device adjusts an edge frequency band of the first cell.
Fig. 3 exemplarily shows a flowchart corresponding to the method for determining an edge user attribute in inter-cell interference coordination provided by the present invention, as shown in fig. 3, including the following steps:
301, the network device obtains the PRB evaluation value of each candidate edge user, the priority of the candidate edge user, and the adjusted edge band value; the priority of the candidate edge users is obtained according to the measurement information of the candidate edge users.
Step 302, the network device determines i candidate edge users before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of PRB evaluation values of the i +1 candidate edge users before ranking is greater than the adjusted edge band value, the sum of PRB evaluation values of the i candidate edge users before ranking is less than or equal to the adjusted edge band value, and i is an integer greater than or equal to 1; and the network equipment takes the candidate central users and the candidate edge users except the determined target edge users as target central users.
In the invention, the network equipment 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 frequency band value, and can effectively avoid the problem that the service requirement of the edge user cannot be met due to more edge users in the prior art, thereby ensuring the service requirement of the edge user and improving the service quality of the edge user.
Specifically, in step 301, the network device may obtain the priority of the candidate edge user in multiple ways, and 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 level of the preset priority according to the signal quality (such as RSRP value) of each candidate edge user and according to the RSRP value; or determining the priority level according to the level of the position information according to the position information of each candidate edge user; the priority may also be determined taking into account the channel quality and location information of each candidate edge user. As shown in table 4, for a ranking example of the candidate edge users, taking 9 candidate edge users as an example, determining priorities of the candidate edge users according to RSRP strengths of the 9 candidate edge users, and ranking the 9 candidate edge users.
Table 4: ranking examples of candidate edge users
Ranking position User name
1 st position User B
Position 2 User G
Position 3 User I
Position 4 User C
Position 5 User E
Position 6 User F
Position 7 User H
Position 8 User D
Position 9 User A
In step 302, the network device counts the sum of the PRB evaluation values of the i-bit candidate edge users before ranking according to the rank of the candidate edge users, and determines that the i-bit candidate edge users before ranking are the target edge users if the sum of the PRB evaluation values of the i-bit candidate edge users before ranking is less than or equal to the adjusted edge band value and the sum of the PRB evaluation values of the i + 1-bit candidate edge users before ranking is greater than the adjusted edge band value. Further, the other users in the cell except the i target edge users are target center users, wherein i is an integer greater than or equal to 1.
It should be noted that, in the embodiment of the present invention, in addition to counting the PRB evaluation values of the candidate edge users, the target edge user may be determined according to the sum of the number of actually scheduled PRBs of the candidate edge users. The specific implementation manner is similar to that of step 303, and is not described herein again.
The following describes the above procedure by taking the example that the network device determines the target edge user according to the PRB evaluation values of the candidate edge users.
For example, after cell a adjusts the edge band value to 20, the rank of the candidate edge users and the PRB evaluation value of each edge user are shown in table 5.
Table 5: ranking and PRB evaluation value examples of candidate edge users
Ranking User name PRB evaluation value
1 st position User B 3
Position 2 User G 2
Position 3 User I 2
Position 4 User C 3
Position 5 User E 3
Position 6 User F 2
Position 7 User H 3
Position 8 User D 4
Position 9 User A 2
According to the contents shown in table 5, the sum of the PRB evaluation values of the candidate edge users of the top 8 bits is 22, and it can be seen that the sum of the PRB evaluation values of the candidate edge users of the top 8 bits (22) is greater than the adjusted edge band value (20); and the sum of the PRB evaluation values of the candidate edge users of the top 7 bits is 18, and the sum (18) of the PRB evaluation values of the candidate edge users of the top 7 bits is smaller than the adjusted edge band value (20), then the candidate edge users of the top 7 bits are determined as the 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 rest 13 users of the cell except the above 7 target edge users are target center users.
Based on the same inventive concept, fig. 4 exemplarily shows a schematic structural diagram of a network device according to an embodiment of the present invention, as shown in fig. 4, the network device 400 includes a receiving unit 401, a processing unit 402, and an adjusting unit 403; wherein,
a receiving unit 401, configured to obtain an evaluation value of PRBs of each user accessing a first cell, a number of actually scheduled PRBs of each user, and measurement information of each user; the PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; the measurement information comprises signal quality and/or location information; the first cell is any one of cells covered and served by the network equipment;
a processing unit 402, configured to determine, according to the measurement information of each user, a candidate edge user and a candidate center user from the multiple users; the candidate center user is a user in the first cell except the candidate edge user;
an adjusting unit 403, 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 center user, and a PRB utilization ratio corresponding to the center user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
Optionally, the adjusting unit 403 is specifically configured to:
after determining that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to be a 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
Optionally, the adjusting unit 403 is specifically configured to:
if it is determined that the PRB utilization rate corresponding to the center user is less than or equal to the first threshold, or if it is determined that the PRB utilization rate corresponding to the center user is greater than the first threshold and the PRB ratio corresponding to the center user is less than or equal to the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to a second edge band value;
the second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
Optionally, after adjusting the edge band value of the first cell, the adjusting unit 403 is further configured to:
and determining a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, the priorities of the candidate edge users and the adjusted edge frequency band value.
Optionally, the adjusting unit 403 is specifically configured to:
determining i candidate edge users before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of PRB evaluation values of the i +1 candidate edge users before ranking is greater than the adjusted edge band value, the sum of PRB evaluation values of the i candidate edge users before ranking is less than or equal to the adjusted edge band value, and 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;
and taking the candidate center users and the candidate edge users except the determined target edge users as target center users.
In the embodiment of the present invention, after a network device obtains an evaluation value of a Physical Resource Block (PRB) of each user of a plurality of users accessing a first cell and a number of actually scheduled PRBs of each user, and determines a candidate edge user from the plurality of users, a PRB ratio corresponding to the candidate edge user, a PRB ratio corresponding to a center user, and a PRB utilization ratio corresponding to the center user are obtained according to the evaluation value of the PRB of each user and the number of actually scheduled PRBs of each user, and then, the network device adjusts an edge band of the first cell according to the above numerical values. In the invention, the network equipment 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 ratio corresponding to the central user, so that the edge frequency band can change along with the change of the requirement of the user, thereby reasonably dividing the edge frequency band resource, effectively avoiding the problems of unreasonable resource allocation of the central user and the edge user and low system spectrum efficiency caused by the fixed edge frequency band in the prior art, further ensuring the requirement of the central user and the edge user resource and improving the overall performance of the system.
As will be appreciated by one skilled in the art, embodiments of the present invention may 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 an embodiment combining software and hardware aspects. Furthermore, the present invention may 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, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A method for inter-cell interference coordination, the method comprising:
the method comprises the steps that network equipment obtains a Physical Resource Block (PRB) evaluation value of each user accessed to a first cell, the number of PRBs actually scheduled by each user and measurement information of each user; the PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; the measurement information comprises signal quality and/or location information; the first cell is any one of cells served by the network equipment;
the network equipment determines candidate edge users and candidate center users from a plurality of users according to the measurement information of each user; the candidate center user is a user in the first cell except the candidate edge user;
the network equipment adjusts the edge frequency band value of the first cell according to any one or any combination of the PRB ratio corresponding to the candidate edge users, the PRB ratio corresponding to the central user and the PRB utilization ratio corresponding to the central user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
2. The method of claim 1, wherein 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 users, the PRB ratio corresponding to the center user, and the PRB utilization corresponding to the center user, and includes:
after the network device determines that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, the edge frequency band value of the first cell is adjusted to be a first edge frequency 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
3. The method of claim 1, wherein 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 users, the PRB ratio corresponding to the center user, and the PRB utilization corresponding to the center user, and includes:
if the network device determines that the PRB utilization rate corresponding to the central user is less than or equal to a first threshold, or if the network device determines that 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 less than or equal to the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to a second edge band value;
the second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
4. The method of any of claims 1 to 3, wherein after the network device adjusts the edge band of the first cell, further comprising:
and the network equipment determines a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, the priorities of the candidate edge users and the adjusted edge frequency band value.
5. The method of claim 4, wherein the network device determines a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, and the priorities and the adjusted edge band values of the candidate edge users, comprising:
the network equipment determines the candidate edge users with i bits before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of the PRB evaluation values of the candidate edge users with i +1 bits before ranking is larger than the adjusted edge band value, the sum of the PRB evaluation values of the candidate edge users with i bits before ranking is smaller than or equal to the adjusted edge band value, and i is an integer larger than or equal to 1; the priority of the candidate edge user is obtained according to the measurement information of the candidate edge user;
and the network equipment takes the candidate central users and the candidate edge users except the determined target edge users as target central users.
6. A network device, characterized in that the network device comprises:
a receiving unit, configured to obtain an evaluation value of a physical resource block PRB of each user accessed in a first cell, a number of actually scheduled PRBs of each user, and measurement information of each user; the PRB evaluation value of each user is the minimum PRB number meeting the service quality of each user; the measurement information comprises signal quality and/or location information; the first cell is any one of cells served by the network equipment;
the processing unit is used for determining candidate edge users and candidate center users from a plurality of users according to the measurement information of each user; the candidate center user is a user in the first cell except the candidate edge user;
an adjusting 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 center user, and a PRB utilization ratio corresponding to the center user; the PRB ratio corresponding to the candidate edge user and the PRB ratio corresponding to the central user are obtained according to the total PRB evaluation value of the corresponding user and the total PRB number actually scheduled respectively; the PRB utilization rate corresponding to the central user is obtained according to the total actually scheduled PRB number of the central user and the total PRB number of the first cell; the central user refers to the central user determined in the last adjustment of the edge frequency band in the first cell.
7. The network device of claim 6, wherein the adjustment unit is specifically configured to:
after determining that the PRB utilization rate corresponding to the central user is greater than a first threshold value and the PRB ratio corresponding to the central user is greater than the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to be a 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 the candidate edge users, and Y is the PRB ratio corresponding to the central user.
8. The network device of claim 6, wherein the adjustment unit is specifically configured to:
if it is determined that the PRB utilization rate corresponding to the center user is less than or equal to a first threshold, or if it is determined that the PRB utilization rate corresponding to the center user is greater than the first threshold and the PRB ratio corresponding to the center user is less than or equal to the PRB ratio corresponding to the candidate edge user, adjusting the edge band value of the first cell to a second edge band value;
the second edge band value is obtained by:
P2＝min(W，Z)
wherein P2 is the second edge band value, W is the maximum edge band value supported by the first cell, and Z is the sum of the number of PRBs actually scheduled by each candidate edge user.
9. The network device of any of claims 6 to 8, wherein the adjusting unit, after adjusting the edge band value of the first cell, is further to:
and determining a target edge user and a target center user from the candidate edge users and the candidate center users according to the PRB evaluation value of each candidate edge user, the priorities of the candidate edge users and the adjusted edge frequency band value.
10. The network device of claim 9, wherein the adjustment unit is specifically configured to:
determining i candidate edge users before ranking as the target edge users according to the priorities of the candidate edge users, wherein the sum of PRB evaluation values of the i +1 candidate edge users before ranking is greater than the adjusted edge band value, the sum of PRB evaluation values of the i candidate edge users before ranking is less than or equal to the adjusted edge band value, and 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;
and taking the candidate center users and the candidate edge users except the determined target edge users as target center users.
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