WO2010096992A1

WO2010096992A1 - Method for adjusting resource metrics

Info

Publication number: WO2010096992A1
Application number: PCT/CN2009/075479
Authority: WO
Inventors: 刘锟; 鲁照华; 刘颖; 曲红云; 王文焕
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-02-27
Filing date: 2009-12-11
Publication date: 2010-09-02
Also published as: CN101820684B; CN101820684A

Abstract

A method for adjusting resource metrics, the method includes that a self-organization network (SON) sends the reference resource metrics information of all or partial sub-band of a base station to the base station (S204). The solution proposed by the invention enables the overall network performance, covering performance and flow performance of system to reach optimization, and the convergence velocity of the resource metrics values can be accelerated.

Description

Method of adjusting resource metrics

The present invention relates to an adjustment technique for resource metrics, and more particularly to an adjustment method for resource metrics. Background technique

In a wireless communication system, a base station (BS) refers to a device that provides services for a mobile station (MS), and the BS communicates with the MS through an uplink and a downlink, wherein a downlink (forward) chain The path refers to the direction of the BS to the MS, and the uplink (reverse) link refers to the direction of the MS to the BS. Multiple MSs can simultaneously transmit data to the BS through the uplink or simultaneously receive data from the BS through the downlink.

In an Orthogonal Frequency Division Multiple Access (OFDMA) system, when data is transmitted between a BS and an MS in the same cell, the links are orthogonal to each other, thereby avoiding intra-cell interference, but A cell using the same frequency resource will have interference to the cell, that is, a small interval interference.

At present, reducing the impact of inter-cell interference on system performance is an important goal of cellular system design. If the interference is severe, the small area will greatly reduce the system capacity, especially the transmission capacity of the cell edge users, thus affecting the coverage capability of the system. And MS. In order to reduce the inter-cell interference strength, Partial Frequency Reuse (FFR) technology can be used to reduce the inter-cell interference strength.

The FFR mainly allocates a frequency resource with a frequency reuse factor of 1 to the MS close to the cell center (MS without significant inter-cell interference), and allocates the frequency of the MS close to the cell edge (MS that is obviously inter-cell 4). Frequency with a reuse factor less than 1 (for example, 1/3, 2/3, etc.) Schematic diagram of the radio power limitation. As shown in Figure 1, all available frequency resources are first divided into 7 subband sets ^ ^[ ^H ^,^,^,^ ₃ ] , where the frequency reuse factor of ^'^'^ is

1/3 (ie Reuse 1/3), the frequency resource in ^'^'^ ³ can be allocated to one of three adjacent sectors, and the other two sectors cannot use the frequency resource or need to use The frequency resource is limited by the method of limiting its transmit power; ^ ² '^ ²³ '^ The frequency reuse factor is 2/3 (ie Reuse 2/3), and the frequency resources in 2, ³ , ^ can be allocated to three phases. Two sectors in the adjacent sector, and the third sector cannot use the frequency resource or need to use the method to limit its transmit power to use the frequency resource; ^ ²³ frequency reuse factor is 1 (ie Reuse 1), three The frequency resource can be used by neighboring sectors, and the reuse set of ^ ²³ is Reuse=l.

Subsequently, the BS obtains resource metrics (Resource Metrics) for each subband, at least including subband price indication information (subband cost value), which is used to describe the degree of tension of each subband resource. For example, the cost of each subband of sector i corresponds to

C =

], the sector i informs the MS under its coverage by corresponding signaling, and the MS obtains the spectral efficiency (SE) of each sub-band through channel estimation, and compares each sub-band by "^ = ^E/ The size of the Cow, which feeds back the channel quality information (CQI) of the M (M ≥ 1) sub-bands to the BS. Finally, the BS allocates resources according to the sub-band CQI reported by the MS, and optimizes the intra-sector. Reasonable scheduling of resources, and adaptively adjust the value of each sub-band cost, and notify the MS in the cell of the adjusted cost value. In order to minimize inter-cell interference strength, and maximize network performance, improve the system. Coverage and system capacity, it is necessary to coordinate the division of frequency resources between sectors, the power allocation, and the cost of each sub-band within the entire network.

In order to meet the needs of increasingly complex mobile communication environments, current wireless communication networks need to be able to dynamically analyze measurement information reported by a large number of related devices, and give relevant device configuration parameters. The number of adjustment information to achieve the purpose of making the system's overall network performance, coverage performance and traffic optimal. Self-Organization Network (SON) is to analyze the relevant data measured by BS and MS in Air Interface, and guide BS to adjust its parameter configuration adaptively, minimize manual intervention, and make system overall network performance. Coverage performance, flow, etc. are optimized for the purpose. SON usually includes two parts: self configuration and self optimization. Self-configuration is a process of BS initialization and automatic configuration, including cell initialization, neighbor discovery, macro BS self-configuration, etc. Self-optimization is analysis from BS. /MS's measurements related to ad hoc network technology to fine tune BS parameters to optimize system performance (eg, quality of service, network efficiency, throughput, cell coverage, cell capacity).

In order to achieve FFR self-optimizing FFR in SON, the necessary signaling interaction between the SON network and the BS is required to optimize the performance of the system. SON analyzes the necessary information reported by the BS, sends relevant signaling to guide the FFR configuration information of each BS, and dynamically adjusts the corresponding configuration parameters. The above process includes the following processing:

Step 1: The BS reports the necessary information to the SON. The reported information includes the BS identifier (BSID), the number of MSs connected to the BS, the location distribution information of the MS, and the MS in different subbands (resource blocks corresponding to different frequency reuse factors). The signal to interference and noise ratio (SINR value), the traffic load indication information of the BS on different subbands, and the converged cost value on different subbands;

Step 2: The SON determines the FFR configuration adjustment signaling according to the information reported by the BS, and sends the FFR configuration adjustment signaling to the BS. The FFR configuration adjustment signaling includes a subband division manner (FFR partitions) and a power level of the FFR partitions. Power levels, BS relative load indicator, and FFR configuration information of the BS. Time stamp for action „

By analyzing the necessary information reported by the BS, SON gives the adjustment information of the FFR partitions and power levels of each BS to optimize the performance of the system. However, because the performance index of the system is closely related to the FFR scheme, the FFR scheme is closely related to the cost value of each sub-band. If the power level of the FFR partitions of the BS changes, the corresponding sub-band cost value needs to be adjusted accordingly to optimize the performance of the system. However, the foregoing method does not provide a calculation method for the reference value of the cost adjustment of each sub-band of the BS. Therefore, the BS cannot obtain any information about the cost value of the sub-band from the SON, and the subsequent cost adjustment strategy of the BS can only be based on the present The adjustment of the BS condition extends the convergence time of the cost value, and ultimately the system performance of the system cannot be optimized. Summary of the invention

The present invention has been proposed in view of the problem that the reference value of the resource metric adjusted by the sub-bands of the base station is not found in the related art, and the convergence rate of the resource metric is slow and the system performance cannot be optimized. The main object of the invention is to provide a method for adjusting resource metrics to solve the above problems in the related art.

In order to achieve the above object, according to an aspect of the present invention, a method of adjusting a resource metric is provided.

The method for adjusting the resource metric of the present invention includes: the self-organizing network determines the reference resource metric information according to the collected information reported by the base station according to the predetermined triggering mechanism; the self-organizing network sends the reference resource metric information of all or part of the sub-band of the base station to the base station; The base station adjusts the resource metric values of all or part of the subband according to the reference resource metric information to speed up the convergence rate of the metric values of the different subband resources.

Preferably, the base station is all or part of base stations that perform signaling interaction with the ad hoc network. Preferably, the predetermined triggering mechanism comprises at least one of the following: a periodic trigger, triggered when the overall performance of the ad hoc network meets the first specific condition, and triggered when the network element performance satisfies the second specific condition.

Preferably, the first specific condition and the second specific condition include at least one of: a threshold value smaller than a preset quality of service, a threshold value smaller than a preset network efficiency, and less than a preset value The set threshold of the throughput, the threshold value smaller than the preset cell coverage, and the threshold value smaller than the preset cell capacity.

Preferably, the ad hoc network transmits reference resource metric information to the base station in one of the following ways: an absolute value form, or a difference form.

Preferably, the absolute value form is: sending the absolute value of the adjusted value in the reference resource metric information to the base station; the difference form is: sending the difference between the adjusted value in the reference resource metric information and the collected information reported by the base station To the base station.

Preferably, the collected information includes at least one of the following: an identifier of the base station, a number of terminals connected to the base station, location distribution information of the terminal, a signal to interference and noise ratio of the terminal on all or part of the subband, and the base station in all or part of the subband The traffic load indication information, the converged resource metric value, and the interference strength indication information.

Preferably, the self-organizing network includes at least one of the following: a network unit, a functional module in the network unit, where the network unit includes at least one of the following: a base station, a server, an access service network element, and a network element connected to the monthly network. , core network element.

Preferably, the reference resource metric information of all or part of the sub-bands includes at least: price indication information of all or part of the molecular band, that is, a sub-band Cost value.

Preferably, the method further includes: the self-organizing network notifying the base station of the predetermined time for the base station to adjust the resource metric value by signaling; or, setting a predetermined time in advance, and saving the data in the base station.

Preferably, the reference resource information is determined according to the formula 1:

Cost = Cost + step X - (T - T)

^W ' ( 1 ), where ^Co is the resource metric value of the base station corresponding sub-band ^ at the next part of the frequency reuse parameter update time, and ^Cast ' is the resource metric value of the base station corresponding sub-band ^ in the last measurement interval, ^^ "The convergence rate is the sub-band traffic load with sequence number i, ^τ is the average value of all sub-band service loads of the base station, and 1 is the sequence number of the sub-band. Preferably, determining the reference resource metric information comprises: determining, by the self-organizing network, an updated reference quantity ^ of the resource metric value of the base station corresponding to the sub-band according to formula 2, and transmitting ^Δ ' to the base station: w' (2), where is the base station Corresponding subbands in the last measurement interval

T

The resource metric value is the sub-band service load with sequence number 1, and is the average value of all sub-band service loads of the base station, where i is the sequence number of the sub-band; after receiving the ^Δ ', the base station determines the sub-band corresponding to the base station according to formula 3.

^ The resource metric value ^{CosteW of the} next part of the frequency reuse parameter update time; Cost-^os^ + step^ ₍₃₎ , where Δ _; · is the updated reference quantity of the resource metric value of the sub-band corresponding to the base station, ^3⁄4 is a sub- The update rate corresponding to ^, 1 is the serial number of the subband.

Preferably, the self-organizing network determines the reference resource metric information according to Equation 4, Equation 5, and Equation 6:

(4), where - is the average of the traffic load of the sub-bands in the last measurement interval of all the base stations in the self-organizing network, and is the sub-band service load with sequence number 1 in the base station with sequence number j, and i is the sub-band The serial number, j is the serial number of the base station in the self-organizing network; 1 ' (5), where T is the average value over all sub-bands, which is the traffic load of the sub-bands of all base stations in the self-organizing network in the last measurement interval The average value, 1 is the serial number of the sub-band;

ψ. - -

Ψ = W _t + step! x^-(T,-T) jr new _ΙΛ

Ψ ^Τ '~ ^Τ) (6), where ^ is the sub-band ^ at the next part of the frequency reuse parameter update time, ^^ is the convergence rate of W, for all base stations in the ad hoc network in the last measurement interval The average of the traffic load of the band is the average value on all subbands, and i is the sequence number of the subband. Preferably, the self-organizing network determines the reference resource f = ∑ ^T ' - source metric information according to Equation 4, Equation 5, Equation 6, and Equation 7: ^ ( 4 ), where is the last measurement interval of all base stations in the ad hoc network The average value of the traffic load of the inner subband is the sub-band service load of the sequence number i in the base station of sequence number j, i is the sequence number of the sub-band, and j is the sequence number of the base station in the ad hoc network; ^T _ ' ( 5 ), where , is the average value on all subbands, is the average value of the traffic load of the subbands in the last measurement interval of all base stations in the ad hoc network, and i is the sequence number of the subband;

In the next part of the frequency reuse parameter update time, the convergence rate of ^ste P' is the average of the traffic load of the sub-bands in the last measurement interval of all base stations in the ad hoc network, which is the flat Co ^ew on all sub-bands. ' ^J = Cost + step;

Mean, i is the serial number of the subband;

(7), where ^ is the resource metric value of the sub-band corresponding to the sub-band of the sequence number j at the time when the next part of the frequency reuse parameter is updated, and ^ea ^ is the resource corresponding to the sub-band of the base station with the sequence number j in the last measurement interval The metric value, where ^^ is the convergence rate of ^, is the value of the subband in the next part of the frequency reuse parameter update time, and is the sub-band service load of the sequence number i in the base station with sequence number j, which is the base station numbered J. The average of all sub-band traffic loads, 1 is the sequence number of the sub-band, and J is the sequence number of the base station in the ad hoc network.

Preferably, the self-organizing network determines the reference resource metric information according to Equation 8 and Equation 9:

Cost] —

Co ^ewj = Costj + step ¹ x——■- (T ^J ― T )

(8), where ^ is the sub-band corresponding to the base station with sequence number j, and the parameter of the resource metric value at the time of the next partial frequency reuse parameter update The test value is the resource metric value of the sub-band corresponding to the base station with the sequence number j in the previous measurement interval, which is the convergence rate of ^C0St , and is the sub-band service load of the sequence number 1 in the base station with the sequence number J, and the sequence number is The average value of all sub-band service loads of J's base station, 1 is the sub-band order

Cost

New Cosr ^w = x- M

Cost

No. j is the serial number of the base station in the self-organizing network; '(9), where ^ is the resource metric value of the sub-band corresponding to the base station with sequence number j at the time of the next frequency reuse parameter update, and M is the self-organizing network The number of base stations that exchange information, i is the sequence number of the subband, and j is the sequence number of the base station in the ad hoc network.

Preferably, determining the reference resource metric information comprises: determining, by the base station, according to formula 8 ^;

Cost ¹ — Cost ^new = Cost ^J + step ³ x—— '-· (P― ) and report it to the ad hoc network;

(8), where ^ is the reference value of the resource metric value of the sub-band corresponding to the base station of sequence number j at the time of the next partial frequency reuse parameter update, and ^ei ^ is the sub-band corresponding to the base station of sequence number j in the previous The resource metric value in the measurement interval, ^ is the convergence rate of ^^ ^, is the sub-band service load of sequence number 1 in the base station with sequence number J, and is the average value of all sub-band service loads of the base station with sequence number J, i The serial number of the subband, j is the serial number of the base station in the ad hoc network;

Cost

New Cost" ^ewJ = Mx- M

The ost network determines ^^^^; J= ^l ' ( 9 ) according to the formula 9, where is the resource metric value of the sub-band corresponding to the base station of the sequence number j at the time of the next part of the frequency reuse parameter update, M is The number of base stations that organize network interaction information, i is the sequence number of the subband, and j is the sequence number of the base station in the ad hoc network. Preferably, the ad hoc network determines the reference resource metric information according to Equation 10:

New Cost f (update information) , _{1 /}

― '■ ( 10 ), A, update information T The information reported by each base station, ^date formation) is a resource metric update algorithm that uses the information reported by each base station as a variable, and is a base station whose serial number is based on informi The corresponding subband ^ is the resource metric value of the next part of the frequency reuse parameter update time, i is the sequence number of the subband, and j is the sequence number of the base station in the ad hoc network.

Preferably, after the base station adjusts the resource metric value according to the reference resource metric information, the method further includes: performing, by the base station, the resource metric update value obtained and the received partial frequency reuse information sent by the ad hoc network, and performing subsequent Partial frequency reuse operation.

Preferably, the part of the frequency reuse information includes at least one of the following: a division manner of all or part of the subbands, a power level of all or part of the subband division manner, a relative load indication information of the base station, and a partial frequency multiplexing configuration information of the base station are uniformly adjusted. The indication of time.

Preferably, performing the subsequent partial frequency multiplexing operation comprises: the base station transmitting the resource metric value of all or part of the sub-band to the terminal; the terminal acquiring the spectral efficiency of each sub-band of the base station, and determining the predetermined schedule of each sub-band according to the spectrum efficiency and the resource metric value. a size of the value, and extracting M predetermined values in descending order of predetermined values, and transmitting channel quality information values of the sub-bands corresponding to each of the M predetermined values to the base station, where M is greater than or equal to A positive integer of I; the base station performs resource allocation according to the channel quality information value, and adjusts the resource metric value of each sub-band, and notifies the adjusted resource metric value to the terminal belonging to the base station.

Preferably, the predetermined value is a ratio of spectral efficiency to resource metric value.

In order to achieve the above object, according to another aspect of the present invention, a method of adjusting a resource metric is provided.

The method for adjusting the resource metric of the present invention includes: receiving, by the base station, performance optimization parameter information, where the performance optimization parameter information includes at least: a reference resource metric of all or part of the sub-bands of the base station The information, the reference resource metric information includes at least: price indication information of all or part of the sub-bands; the base station adjusts the partial frequency reuse parameter according to the performance optimization parameter information.

By means of the technical solution of the present invention, the SON determines the reference resource metric information of all or part of the sub-bands of each base station by analyzing the information reported by the base station, and notifies the corresponding base station by referring to the resource metric information, and the base station adjusts the FFR configuration parameter according to the information, and solves the problem. The method for calculating the reference value of the resource metric adjusted by each sub-band of the base station is not given in the related art, and the convergence rate of the resource metric is slow, and the system performance cannot be optimized, so that the system performance, coverage performance, Traffic performance is optimized and the convergence of resource metrics is accelerated. DRAWINGS

1 is a schematic diagram of a frequency resource allocation manner of adjacent sectors and a transmission power of each sub-band when FFR technology is used in the related art;

2 is a flowchart of a partial frequency reuse self-optimization method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a self-organizing network architecture according to an embodiment of the present invention;

4 is a schematic diagram of a frequency resource allocation manner of adjacent sectors and a transmission power of each sub-band using FFR technology according to an embodiment of the present invention. Detailed ways

In the related art, there is a problem that a calculation method of a reference value adjusted by a resource metric value of each sub-band of a base station is not given, and the resource metric value of the sub-band has a slow convergence rate and the system performance cannot be optimized. A self-optimizing FFR method is provided. In the technical solution of the present invention, the SON determines the reference resource metric information of all or part of the sub-bands of each base station by analyzing the information reported by the base station, and notifies the corresponding base station of the information, and the base station according to This information adjusts the FFR configuration parameters.

The preferred embodiments of the present invention are described in the following with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention. In the following description, numerous specific details are set forth However, it is apparent that the present invention may be practiced without these specific details. Further, the details of the following embodiments and examples may be made without departing from the spirit and scope of the appended claims. Make various combinations.

Method embodiment 1

An embodiment of the present invention provides a partial frequency reuse self-optimization method, and FIG. 2 is a flowchart of a partial frequency reuse self-optimization method according to an embodiment of the present invention. As shown in FIG. 2, the following processing is included (step S202- Step S208):

Step S202: The base station reports the adjustment parameter information to the SON, that is, the collected information, and the SON determines, according to the collected information reported by the base station, the adjustment information of the resource metrics (Resource Metrics) of all or part of the sub-bands of the base station, that is, the reference resource metric information. The collected information reported by the base station includes but is not limited to the following: BSID, the number of terminals connected by the base station, the location distribution information of the terminal, the SINR value of the terminal on all or part of the sub-bands (FFR partitions), the base station in all or The sub-band carries the traffic load indication information, the converged resource metric value, the interference strength indication information, and the like; and, the reference resource metric information of all or part of the sub-band includes at least the sub-band price indication information, that is, the sub-band Cost value.

In step S202, the trigger mechanism for the SON to determine the reference resource metric information of all or part of the sub-bands of the base station includes, but is not limited to, the following manner: a periodic trigger, an overall performance of the SON meets a specific condition trigger, and a certain network unit performance meets a specific condition trigger . The specific condition includes at least one of the following: the quality of service is less than a preset threshold, the network efficiency is less than a preset threshold, the throughput is less than a preset threshold, and the cell coverage is less than a preset. The threshold value and the cell capacity are less than a preset threshold.

In step S202, the SON may be a network unit, or may exist as a function module in one or more network units, where the network unit may be a base station, a server, or a connection. Incoming service network element, connecting service network element, core network element, etc. In addition, the base station may be all or part of the base station that performs signaling interaction with the SON.

In addition, in practical applications, determining reference resource metric information can be divided into the following cases:

Case 1: Determine the reference resource metric information according to Equation 1.

Cost ^new = Cost + step . (T - f)

''' ^W '' ( 1 ) where ^^^ is the resource metric value of the base station corresponding sub-band ^ at the next part of the frequency reuse parameter update time, ^^' is the base station corresponding sub-band ^ resources in the last measurement interval Measure value, ^^ is

The convergence rate of ^C ^ew is the sub-band service load with sequence number 1, which is the average value of all sub-band service loads of the base station, i is the sequence number of the sub-band, and i is a natural number.

Case 2: Determine the reference resource metric information according to Equation 2 and Equation 3.

The self-organizing network determines an updated reference quantity ^ of the resource metric value of the base station corresponding to the sub-band according to Equation 2, and sends ^ to the base station: w' (2)

Where ^^' is the resource metric value of the sub-band corresponding to the sub-band in the previous measurement interval, which is the sub-band service load with the sequence number i, which is the average value of all sub-band service loads of the base station, and i is the sub-band number. i is a natural number;

After receiving the A, the base station determines, according to the formula 3, the resource metric value ^{Co of the} sub-band corresponding to the sub-band in the next part of the frequency reuse parameter update time;

Cosf^ = Cost! + st p, χΔ _; ( ₃ ) Where ^Δ ' is the updated reference quantity of the resource metric value of the sub-band corresponding to the base station, ^ is the update rate corresponding to the sub-band ^, i is the sequence number of the sub-band, and i is a natural number.

Case 3: Determine the reference resource metric information according to Equation 4, Equation 5, and Equation 6. 1 ( 4 ) where is the average value of the traffic load of the sub-bands in the last measurement interval of all the base stations in the self-organizing network, the sub-band service load with sequence number 1 in the base station with sequence number j, and 1 is the sequence number of the sub-band , j is the serial number of the base station in the self-organizing network, and ij is a natural number;

¹ ^ ( 5 ) where is the average value over all subbands, the average of the traffic load of the subbands in the last measurement interval of all base stations in the ad hoc network, i is the sequence number of the subband, and i is a natural number;

W" ^ew = W, + step, X £■ · (f, - T)

T ( 6 ) where W is the value of the sub-band ^ at the time when the next part of the frequency reuse parameter is updated, ^^ is the convergence rate of W, which is the service load of the sub-bands in the last measurement interval of all the base stations in the self-organizing network. The average value, ^ is the average value over all sub-bands, 1 is the serial number of the sub-band, and 1 is the natural number.

Case 4: The reference resource metric information is determined according to Equation 4, Equation 5, Equation 6, and Equation 7.

Wherein, is the average value of the traffic load of the sub-bands in the last measurement interval of all the base stations in the self-organizing network, where i is the sequence number of the sub-band, j is the sequence number of the base station in the ad-hoc network, and ij is a natural number;

(5) Where is the average value on all subbands, which is the average value of the traffic load of the subbands in the last measurement interval of all base stations in the ad hoc network, where i is the sequence number of the subband, and i is a natural number;

Where W is the value of the sub-band ^ at the next part of the frequency reuse parameter update time, ^^ is the convergence rate of W, and ^ is the average value of the service load of the sub-bands in the last measurement interval of all base stations in the self-organizing network. ^ is the average value on all sub-bands, 1 is the serial number of the sub-band, 1 is a natural number;

Cost ¹ ―

Cost ' ^J = Cost] + step; x -- (Τ - T ^J )

^ ( 7 ) where is the resource metric value of the sub-band corresponding to the sub-band of the sequence number j in the next part of the frequency reuse parameter update time, and the resource metric value of the sub-band corresponding to the sub-band of the sequence number j in the last measurement interval, ^ For the convergence rate of ^^, W is the value of the sub-band ^ at the next part of the frequency reuse parameter update time, and is the sub-band service load with the sequence number i in the base station of sequence number j, which is the sub-base of the sequence number J. With the average value of the traffic load, 1 is the sequence number of the subband, j is the sequence number of the base station in the ad hoc network, and ij is the natural number.

Case 5: Determine the reference resource metric information according to Equation 8 and Equation 9.

Cost ¹ —

Cost ^new ' ^J = Cost] + step] x—— '-■ (T ^J ― T] )

' ^W >' ( 8 ) where is the reference value of the resource metric value of the sub-band corresponding to the base station of sequence number j at the next partial frequency reuse parameter update time, and ^ea ^ is the sub-band corresponding to the base station of sequence number ^ The resource metric in the last measurement interval, _t is the convergence rate of the ^cost , and is the sub-band service load with the sequence number i in the base station of sequence number j, which is the sub-band industry of the base station with the sequence number j. The average value of the workload, i is the serial number of the subband, j is the serial number of the base station in the self-organizing network, and i and j are natural numbers;

New Cost ^newJ =Mx

(9) where ^_^ ^ ^; is the resource metric value of the sub-band corresponding to the base station of sequence number j at the time when the next part of the frequency reuse parameter is updated, and M is the number of base stations that exchange information with the ad hoc network, i is a sub- The serial number of the band, j is the serial number of the base station in the self-organizing network, and i and j are natural numbers. Case 6: After the base station determines ^^ according to formula 8, the self-organizing network is determined according to formula 9.

The New_Cosr ^w base station determines ^{C t ]} according to Equation 8 and reports it to the ad hoc network;

Cost ^} —

Cost^' ¹ = Cost! + step ¹ x—— '-· (T ^J ― T )

, ^W '' (8) where ^«Γ ^ is the reference value of the resource metric value of the sub-band corresponding to the base station of sequence number j at the time of the next partial frequency reuse parameter update, and ^ea ^ is the base station of sequence number j The resource metric value of the sub-band ^ in the last measurement interval, the convergence rate of the township is ^c °, is the sub-band service load of the sequence number i in the base station of sequence number j, and is the sub-band service of the base station with the sequence number j The average value of the load, i is the serial number of the subband, j is the serial number of the base station in the self-organizing network, and i and j are natural numbers;

Self-organizing network is determined according to formula 9

(9) Wherein, ^_^ ^ ^; is the resource metric value of the sub-band corresponding to the base station of sequence number j at the time when the next part of the frequency reuse parameter is updated, M is the number of base stations that exchange information with the ad hoc network, and i is the sequence number of the sub-band , j is the serial number of the base station in the self-organizing network, and i and j are natural numbers.

Case 7: The reference resource metric information is determined according to Equation 10.

New_Cost = {update information) ( io ) where update information is the information reported by each base station, and f ^u P ^date rmation) is a resource metric update algorithm that uses the information reported by each base station as a variable, based on The resource metric value of the sub-band corresponding to the base station of sequence number j at the time when the next part of the frequency reuse parameter is updated, i is the sequence number of the sub-band, j is the sequence number of the base station in the ad hoc network, and i and j are natural numbers.

Step S204: The SON sends the reference resource metric information of all or part of the sub-bands of the base station to the base station.

The reference resource metric information of all or part of the subbands sent by the SON may be in the form of an absolute value or a difference value. That is to say, the absolute value of the adjusted value in the reference resource metric information may be sent to the base station, and the difference between the adjusted value in the reference resource metric information and the collected information sent by the base station may be sent to the base station.

Step S206: The base station obtains the resource metric reference value according to the received reference resource metric information, determines the resource metric update value from the resource metric reference value, and uniformly updates the resource metric value of all or part of the subbands at a specified time.

Specifically, in step S206, when the reference resource metric information is sent to the base station in an absolute value form, the base station sets the resource metric reference value as the adjustment value in the reference resource metric information, and obtains the resource metric update according to a certain algorithm. Value; when the reference resource metric information is sent to the base station in the form of a difference, the base station according to the locally saved adjustment reference information and the reference resource metric information The difference in the interest determines the resource metric reference value, and according to a certain algorithm, the resource metric update value is obtained.

In another aspect, the resource metric update value of all or part of the sub-bands in the local base station is a resource metric reference value obtained by the base station, or a new resource metric update value determined according to the resource metric reference value; preferably, the foregoing specified time The base station may be notified by the SON through relevant signaling, or may be saved as a default configuration on the base station side.

Step S208: The base station completes the subsequent FFR operation according to the obtained subband resource metric update value and other FFR related information.

Among other FFR related information, including but not limited to the following: FFR partitions (sub-band division), and / or Power levels (FFR partitions power level), and / or Relative load indicator (BS relative load indication information), And/or Time stamp for action (instruction information for adjusting the time of the base station FFR configuration information).

Preferably, completing the subsequent FFR operation includes the following processing:

1. The base station sends all or part of the sub-band resource metric values to the terminal;

2. The terminal obtains the SE of each sub-band through channel estimation, and feeds the CQI of the "maximum M (M ≥ 1) sub-bands to the base station by comparing nSE = SEI _COS t of each sub-band.

3. The base station performs resource allocation according to the sub-band CQI reported by the terminal, and adaptively adjusts the value of each sub-band cost, accelerates the convergence rate of each sub-band cost value, optimizes the reasonable scheduling of resources in the sector, and adjusts The subsequent subband cost value informs the terminal in the cell.

The above technical solutions of the present invention will be exemplified below with reference to examples.

Example 1 , a detailed description of the case 1.

As shown in FIG. 3, it is assumed that there are three base stations, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the serving base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a functional module in the network element, and perform necessary signaling interaction with BS1, BS2, and BS3, and at least include in the SON. Self-optimizing FFR modules (Self-Optimizing FFR modules) can also include other functional modules. The frequency resource division mode of BS1, BS2, and BS3 and the power allocation of each sub-band are as shown in FIG. 4, and the available frequency resources are divided into two frequency partitions (Frequency Partition 1 (Reuse 1/3, including Subband ^ ² '^ ³ ) and Frequency Partition 2 (Reuse 1, including subband ^ ), where each subband transmit power satisfies the condition ^{≥ Ρ} «» >A. _W. This example uses BS1 as an example to specify the Self-optimizing FFR method.

Step 1: The base station reports information to the SON. The reported information includes but is not limited to the following:

BSID, the number of terminals connected to the base station, the location distribution information of the terminal, the S1NR value of the terminal on the subband ^^, ^, ^, the service load indication information on the subband ^^'^'^, the subband ^ ₂ , , Interference strength indication information, resource metric information (also referred to as Cost value) of the subband ^, and the like.

Wherein, it is assumed that ⁷ ί'2'' is the traffic load indication information of BS1 in a measurement interval of ^ ^ '^'^, ^α^ ₂ , α^ ₃ , α^ ₄ are _BS1 corresponding ^ '' The value of Cost in the last measurement interval.

Step 2: According to the information reported by the base station, the SON compares the information with a preset FFR parameter update decision threshold. If the FFR parameter update condition is met, the FFR parameter update is performed; otherwise, the FFR parameter update is not performed. It is assumed in the present embodiment that the FFR parameter needs to be updated according to the comparison result. The method for updating the cost value of each sub-band in BS1 is as shown in Equation 1A:

Cost Doctor = Cost +step x^^-(T-f) (ι=1, 2,3,4)

^W - (1A) where is the Cost value of the corresponding subband of BS1 in the last measurement interval, and the ^Cost pin is

BS1 corresponds to the Cost value of the subband at the time of the next FFR parameter update, and ^s is the receipt of Cost.

― 1 ^N

J = 1 J _

The convergence rate, , N is the number of sub-bands (N = 4 in this example), that is, the average of the traffic load of all sub-bands of BS1. Step 3: The SON sends the updated sub-band Cost value ( ^Co ) to the base station BS1, where the SON may send the updated Cost value of all sub-bands or the Cost value of the partial sub-band.

Step 4: After the specified FFR parameter adjustment time arrives, the BS1 uniformly adjusts the cost value of each sub-band, and notifies the sub-band Cost value to the terminal under the base station, where the serving base station BS1 can send the cost value of all sub-bands or The cost value of the partial subband, the terminal will restore the cost value of all subbands according to the sending rule.

Step 5: The terminal obtains the SE of each sub-band through channel estimation, and feeds the _C QI of the largest sub-band of ≥ 1) sub-bands to BS1 by comparing the sizes of nSE = SE l east of each sub-band.

Step 6: The base station allocates resources according to the sub-band CQI reported by the terminal, and adjusts the value of each sub-band cost, and notifies the adjusted end sub-band cost value to the terminal in the cell.

The method can accelerate the convergence rate of the cost values of the sub-bands of the base station, and optimize the reasonable scheduling of resources in the SON.

Example 2, Case 2 is described in detail.

As shown in FIG. 3, three base stations are assumed, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the service base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a function module in the network unit, and perform necessary signaling interaction with BS1, BS2, and BS3. The SON includes at least a Self-Optimizing FFR module, and may also include other functional modules. The frequency resource division modes of BS1, BS2, and BS3 and the power allocation of each sub-band are shown in Figure 4. The available frequency resources are divided into two frequency partitions, including Frequency Partition 1.

(Reuse 1/3, including subband ^'^'^) and Frequency Partition 2 (Reuse 1 , including subbands where each subband transmit power satisfies the condition ^^ ^^〉^^. This example uses BS1 as an example to illustrate Self-optimizing FFR method. Step 1: The base station reports information to the SON, and the reported information includes but is not limited to the following contents: BSID, number of terminals connected by the base station, location distribution information of the terminal, SINR value of the terminal in the subband ^^, ^, ^, subband ^ ^'^'^ The traffic load indication information, the interference strength indication information on the subband ^ ₂ '', the Cost value of the subband ^ , , and so on. Among them, it is assumed that ⁷ ί' Ί ⁷ is the traffic load indication information of BS1 in a measurement interval of ^ ^ '^'^, respectively, ^α^ ₂ , α^ ₃ , α^ ₄ are _BS1 corresponding ^ '' The value of Cost within a measurement interval.

Step 2: According to the information reported by the base station, the SON compares the information with a preset FFR parameter update decision threshold. If the FFR parameter update condition is met, the FFR parameter update is performed; otherwise, the FFR parameter update is not performed. In this embodiment, it is assumed that the FFR parameter needs to be updated according to the comparison result, wherein the method for updating the Cost value of each sub-band in BS1 is as shown in Formula 2A:

^Δ Ί (

w' -) (2A) where ^^ is the Cost value of BS1 corresponding subband ^ in the last measurement interval; ^Δ ' is

― 1 ^Ν

τ

BS1 corresponds to the updated reference quantity of the Cost value of the subband; ^Ν ^ ¹ , Ν is the number of subbands (Ν = 4 in this example), that is, the average value of the traffic load of all subbands. Step 3: The SON sends an update reference number VIII of each sub-band Cost value to the base station BS1. Step 4: After receiving the ^Δ ′ sent by the SON, the BS1 determines the updated value of each sub-band Cost according to the formula:

Cos't = Cost, + step, XA, (1=1,2,3,4) ( _3A ) where ^Δ ' is the updated reference quantity of the Cost value of the subband of BS1; ^ is the subband ^ corresponding Update rate, each base station can dynamically adjust ^ according to its own environment, or by SON notifies the value of each base station ^ste Pi; ^Cost " ^eW is the Cost value of BS1 corresponding sub-band ^ at the next FFR parameter update time.

Step 5: After the FFR adjustment time arrives, the BS1 uniformly adjusts the cost value of each sub-band, and notifies the sub-band Cost value to the terminal under the base station. The serving base station BS1 may notify the terminal under the base station of the cost value of all the sub-bands or the cost value of the partial sub-band, and the terminal recovers the cost value of all the sub-bands according to the sending rule.

Step 6. The terminal obtains the SE of each sub-band through channel estimation, and feeds the _C QI of the largest sub-band of ≥ 1) sub-bands to BS1 by comparing the sizes of nSE = SE l east of each sub-band.

Step 7: The base station allocates resources according to the sub-band CQI reported by the terminal, and adjusts the value of each sub-band cost, and notifies the adjusted sub-band cost value to the terminal in the cell.

Example 3, detailing Case 3.

As shown in FIG. 3, three base stations are assumed, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the serving base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a function module in the network element, and perform necessary signaling interaction with BS1, BS2, and BS3. The SON includes at least a Self-Optimizing FFR module, and may also include other functional modules. The frequency resource division manners of BS1, BS2, and BS3 and the power allocation of each sub-band are as shown in FIG. 4, and the available frequency resources are divided into two frequency partitions (Frequency Partition 1 (Reuse 1/). 3, including sub-band ^'^'^) and Frequency Partition 2 (Reuse 1 , including sub-bands in which each sub-band transmit power satisfies the condition ^^ ^^〉^^. This example uses BSl as an example to specify Self-optimizing FFR method. Step 1: The base station reports the information to the SON, and the reported information includes but is not limited to the following content:

BSID, the number of terminals connected to the base station, the location distribution information of the terminal, the SINR value of the terminal on the subband ^^, ^, ^, the service load indication information on the subband ^^'^'^, the subband ^ '^'^ The interference strength indication information on the upper part, the resource metric information of the sub-^^'^'^ (also referred to as the Cost value), and the like. Wherein, 4叚 is ⁷ ^ is the service load indication information in the last measurement interval of ^, where i is the sequence number of the subband, in this example i=l, 2, 3, 4, j is SON The serial number of the BS, in this example j = 1, 2, 3.

Step 2: According to the information reported by the base station, the SON compares the information with a preset FFR parameter update decision threshold. If the FFR parameter update condition is met, the FFR parameter update is performed; otherwise, the FFR parameter update is not performed. It is assumed in the present embodiment that the FFR parameter needs to be updated according to the comparison result. Among them, the update method of each subband ^ ^, ^, ^ size is as shown in formula 4A, formula 5A, formula

As shown in 6A:

( 4A ) where Ti is the average of the traffic load of the subbands of all BSs in the SON during the last measurement interval.

― 1 ⁴ —

4 _ί= ι ( 5Α ) where is the average value over all subbands _£

W, + ste _Pi xi-(f _I -T) (1=1,2,3,4)

(6A) where: is the value of the subband at the time of the next FFR parameter update; the convergence rate of ^ste Pi, ,

Step 3: SON sends the updated sub-band W value (^ W ₂ , W ₃ , W ₄ ) to each base station.

Step 4: After receiving the sub-band W value sent by the SON, the base station uniformly adjusts the W value of each sub-band at the arrival time of the specified FFR adjustment period, and notifies the terminal of the base station to the terminal of the base station. The serving base station may send the W value of all subbands or the W value of some subbands, and the terminal recovers the W values of all subbands according to the sending rule.

Example 4, detailing Case 4.

(Reuse 1/3, including subband ^'^' ^ ) and Frequency Partition 2 (Reuse 1 , including subbands), where each subband transmit power satisfies the condition ^Ρ ^ ^≥ ^Ρ ^ι ^{> 7} ^. This example uses BS1 as an example to specify the Self-optimizing FFR method.

Step 1: The base station reports the information to the SON, and the reported information includes but is not limited to the following:

BSID, the number of terminals connected by the base station, the location distribution information of the terminal, the SINR value of the terminal on the subband ^, ^, ^, ^, the traffic load indication information on the subband ^, the interference strength indication on the subband ^ ₂ , , Information, sub-band ^Ί^'^ resource metric information (Resource Metrics, also known as Cost value). Wherein, 4叚 is ⁷ ^ is the service load indication information in the last measurement interval of ^, where i is the sequence number of the subband, in this example i=l, 2, 3, 4, j is SON The serial number of the BS, in this example j = 1, 2, 3.

Step 2: The SON compares the information with a preset FFR parameter update decision threshold according to the information reported by the base station, and if the FFR parameter update condition is met, performs FFR parameter update; otherwise, the FFR parameter update is not performed. It is assumed in this embodiment that the FFR parameter needs to be updated according to the comparison result. The update method of the size of each sub-band ^'^'^^ ⁴ is as shown in Formula 4A, Formula 5A, Formula 6A, and Formula 7A:

Where is the average of the traffic load of the subbands of all BSs in the SON during the last measurement interval.

― 1 4 _

4 _ί= ι ( 5A )

Where is the average of ^ on all subbands.

Where W is the value of the subband ^ at the time of the next FFR parameter update; the convergence rate of the township.

Step 3: According to the calculation, SON determines that the update method of each sub-band Cost value is as shown in Formula 7A:

Cost ¹ ―

Cost = Cost ³ + step ^r ι' x- j ~r new '—· ( ^v T ^J ― )

^W ' ( 7A )

Wherein ^is; in the corresponding subband value within a measurement interval Cost; ^Cost ^"eW to the corresponding subband ^ ^ FFR parameter value Cost next update time; 's as ^C.str] yield _ 1 ^N

Convergence rate; — ^Ν ^ ' , Ν is the number of subbands (Ν = 4 in this example), that is, the average of all subband traffic loads. Step 4: The SON sends the updated subband W value (W) and the subband cost value ( ^Cost ) to each base station.

Step 5: After receiving the sub-band W value and the sub-band cost value sent by the SON, the base station uniformly adjusts the W value and the sub-band cost value of each sub-band at the arrival time of the predetermined FFR adjustment period, and adjusts the sub-band W value and The sub-band Cost value informs the terminal under the base station. The serving base station may send the W value and the Cost value of all the subbands, and may also send the W value and the Cost value of the partial subband, and the terminal restores the W value and the Cost value of all the subbands according to the sending rule.

Step 6. The terminal obtains the SE of each sub-band through channel estimation, and feeds back the CQI of the largest M (M ≥ 1) sub-bands to the base station by comparing the size of each sub-band with "3⁄4:= 3⁄4:/ _c ^ .

Example 5, detailing Case 5.

As shown in FIG. 3, three base stations are assumed, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the serving base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a function module in the network element, and perform necessary signaling interaction with BS1, BS2, and BS3. The SON includes at least a Self-Optimizing FFR module, and may also include other functional modules. The frequency resource division manners of BS1, BS2, and BS3 and the power allocation of each sub-band are as shown in FIG. 4, and the available frequency resources are divided into two frequency partitions (Frequency Partition), including Frequency Partition 1 (Reuse 1/3, including subband ^'^' ^ ) and Frequency Partition 2 (Reuse 1 , including subbands), where each subband transmit power satisfies the condition ^^^ ^> ^. This example uses BS1 as an example to specify the Self-optimizing FFR method.

BSID, the number of terminals connected to the base station, the location distribution information of the terminal, the SINR value of the terminal on the subband ^^, ^, ^, the traffic load indication information on the subband ^, the interference strength indication information on the subband ^, the subband ^Ί^'^'s resource metric information (Resource Metrics, also known as Cost value).

Wherein, 4叚 is ⁷ ^ is the traffic load indication information in the last measurement interval, where i is the serial number of the sub-band, and 4 is the value of the Cost in the last measurement interval where ^e ^ is ^ ^ Where i is the sequence number of the subband, in this example i=l, 2, 3, 4, j is the serial number of the BS in the SON, in this example j=l, 2, 3.

Step 2: The SON compares the information with a preset FFR parameter update decision threshold according to the information reported by the base station, and if the FFR parameter update condition is met, performs FFR parameter update; otherwise, the FFR parameter update is not performed. It is assumed in the present embodiment that the FFR parameter needs to be updated according to the comparison result. The method for updating the sub-band Cost value is as shown in Equation 8A and Equation 9A.

Cost ^] —

Cost" ^ew = Cost + step ³ x—— '- (P- T ^J )

^W ' ( 8A ) where ^ is ^ ^{; the} corresponding sub-band ^ is the Cost value in the last measurement interval; ^Cost " ^eW is the reference value of ^ corresponding sub-band ^ at the next FFR parameter update time; ^^

_ 1 ^N

The convergence rate of α ^; _ N ' , N is the number of sub-bands (N = 4 in this example), that is, the average of all sub-band traffic loads. Cost

New Cost ^newJ = Mx- M

J= ^l ' ( 9A )

Where M is the number of base stations that exchange information with SON. In this embodiment, M=3; New _Cosf^ is the Cost value of the corresponding sub-band at the next FFR parameter update time. Step 3: SON sends the updated sub-band Cos i ( ^New - ^Cost 7 ^W ) to the corresponding base station. The SON may send a Post value of all subbands after update or a Cost value of a partial subband.

Step 4: After the base station arrives at the preset FFR parameter adjustment time, the base station uniformly adjusts the cost value of each sub-band, and notifies the sub-band Cost value to the terminal under the base station. The base station may send the cost value of all the sub-bands or the cost value of the partial sub-bands, and the terminal restores the cost value of each sub-band according to the sending rule.

Step 5: The terminal obtains the SE of each sub-band through channel estimation, and feeds the CQI of the largest M (M ≥ 1) sub-bands to the base station by comparing the sizes of "S £ = S £ / « of each sub-band.

Step 6: The base station allocates resources according to the sub-band CQI reported by the terminal, and adjusts the value of each sub-band cost, and notifies the adjusted sub-band cost value to the terminal in the cell.

Example 6 is a detailed description of Case 6.

As shown in FIG. 3, three base stations are assumed, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the serving base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a function module in the network element, and perform necessary signaling interaction with BS1, BS2, and BS3. The SON includes at least a Self-Optimizing FFR module, and may also include other functional modules. The frequency resource division modes of BS1, BS2, and BS3 and the power allocation of each sub-band are shown in Figure 4, and the available frequencies will be used. Source Ge' J is divided into two frequency partitions (Frequency Partition 1 (Reuse 1/3, including subband ^'^'^) and Frequency Partition 2 (Reuse 1 , including subband), where each sub The band transmission power satisfies the condition ^P i ^{> jP} ^. This example uses BS1 as an example to specify the Self-optimizing FFR method.

BSID, the number of terminals connected to the base station, the location distribution information of the terminal, the SINR value of the terminal on the subband ^, ^, ^, ^, the service load indication information on the subband ^^'^'^, the subband ^ ₂ , The interference strength indication information, the resource metric information (Resource Metrics, also called Cost value) of the sub-band ^^^^. Wherein, 4叚 is ⁷ ^ is the service load indication information in the last measurement interval of ^, where i is the serial number of the sub-band, and 4 is the value of ^C in the last measurement interval of ^ ^ Where i is the sequence number of the subband, in this example i=l, 2, 3, 4, j is the serial number of the BS in the SON, in this example j=l, 2, 3

Then, according to the service load indication information and the sub-band Cost value information in the previous measurement interval, the base station gives the update method of the Cost value as shown in the formula 8A, and reports the ^^ value to the SON.

Cost ^J —

Cost ^ew = Cost; + step ³ x—— - - (T ^J ― T ^J )

Wherein, is the _Cost value of the corresponding subband in the previous measurement interval; is the reference value of the Cost value of the ^^ corresponding subband in the next FFR parameter update time; ^^

_ 1 ^N

C. The convergence rate of ^r ^; -- wit ' , Ν is the number of subbands (Ν = 4 in this example), that is, the average of all subband traffic loads.

Step 2: The SON compares the information with a preset FFR parameter update decision threshold according to the information reported by the base station, and if the FFR parameter update condition is met, performs FFR parameter update. Otherwise the FFR parameter update is not performed. It is assumed in this embodiment that the FFR number needs to be updated according to the comparison result. The update method of the sub-band Cost value is as shown in Formula 9A.

New Cost ^new = M

Where M is the number of base stations that exchange information with SON, in this embodiment, M=3; New-Cost is the Cost value of the corresponding sub-band at the next FFR parameter update time. Step 3: SON sends the updated sub-band Cos i ( ^New - ^{Cost W} ) to the corresponding base station. The SON may send the updated Cost value of all subbands or the Cost value of the partial subbands. Step 4: After the specified FFR parameter adjustment time arrives, the base station uniformly adjusts the Cost value of each subband, and notifies the subband Cost value. The terminal under the base station. The base station may send a Cost value of all subbands or a Cost value of a partial subband, and the terminal may restore a Cost value of each subband according to a sending rule.

Step 5: The terminal obtains the SE of each sub-band through channel estimation, and feeds back the CQI of the largest M (M ≥ 1) sub-bands to the base station by comparing the size of each sub-band " 3⁄4: = 3⁄4: / _c ^ .

The method can accelerate the convergence rate of the cost values of the sub-bands of the base station, and optimize the reasonable scheduling of the resources in the SON network.

Example 7, detailing case seven.

As shown in FIG. 3, three base stations are assumed, which are BS1, BS2, and BS3, respectively, where the serving base stations of MS1 and MS2 are BS1; the serving base stations of MS3 and MS4 are BS2; and the serving base stations of MS5 and MS6 are BS3. The SON may be a network entity or exist as a function module in the network element, and perform necessary signaling interaction with BS1, BS2, and BS3, and the SON includes at least The Self-Optimizing FFR module can also include other functional modules. The frequency resource division manners of BS1, BS2, and BS3 and the power allocation of each sub-band are as shown in FIG. 4, and the available frequency resources are divided into two frequency partitions (Frequency Partition 1 (Reuse 1/). 3, including subband ^'^'^) and Frequency Partition 2 (Reuse 1 , including subbands where each subband transmit power satisfies the condition ^^ ^^> ^. This example uses BS1 as an example to specify the Self-optimizing FFR method. .

BSID, the number of terminals connected to the base station, the location distribution information of the terminal, the S1NR value of the terminal on the subband ^^, ^, ^, the service load indication information on the subband ^^'^'^, the subband ^ ₂ , , The interference strength indication information, the resource metric information of the subband ^ (Resource Metrics, also called Cost value), and the like.

Step 2: The SON compares the information with the preset FFR parameter update decision threshold according to the information reported by the base station, and if the FFR parameter update condition is met, performs the FFR parameter update; otherwise, the FFR parameter update is not performed. It is assumed in the present embodiment that the FFR parameter needs to be updated according to the comparison result. The update method of the sub-band cost value is shown in Equation 10A.

New Cost = f (update inl

( 10A )

Wherein, update information is information reported by each base station; f ^u P ^date rmation) is a cost value update algorithm that uses the information reported by the base station as a variable; ^New — ^Cos r ^J is according to the formula /( _M 3⁄4 fote " r _a to ") Determines the Cost of the corresponding subband at the time of the next FFR parameter update.

Step 3: SON sends the updated sub-band Cos i ( ^New - ^Cost 7 ^W ) to the corresponding base station. The SON may send the updated Cost value of all sub-bands or the cost value of the partial sub-bands. Step 4: After the specified FFR parameter adjustment time arrives, the base station uniformly adjusts the Cost value of each sub-band, and notifies the sub-band Cost value. The terminal under the base station. Wherein, the base station can send Send the cost value of all subbands or the cost value of some subbands, and the terminal will restore the cost value of each subband according to the sending rule.

Step 5: The terminal obtains the SE of each sub-band through channel estimation, and feeds the CQI of the largest M (M ≥ 1) sub-bands to the base station by comparing the size of each sub-band with "S = S / _C.

Method embodiment 2

The embodiment of the present invention provides a method for adjusting a resource metric. In this embodiment, the base station first receives performance optimization parameter information, where the performance optimization parameter information includes at least: reference resource metric information of all or part of subbands of the base station. The reference resource metric information includes at least: price indication information of all or part of the subbands; subsequently, the base station adjusts the partial frequency reuse parameter based on the performance optimization parameter information. The details included in the embodiment are described in detail in the first embodiment of the method, and are not described herein again.

In summary, with the technical solution of the present invention, the information reported by the base station is analyzed by the SON, the reference resource metric information of all or part of the sub-bands of each base station is determined, and the reference base metric information is notified to the corresponding base station, and the base station adjusts according to the information. The FFR configuration parameter solves the problem that the reference value of the resource metric adjusted by the sub-bands of the base station is not calculated in the related art, and the convergence rate of the resource metric is slow, and the system performance cannot be optimized, so that the system is completely networked. Performance, coverage performance, traffic performance are optimized, and the convergence rate of resource metrics is accelerated.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network of multiple computing devices. Alternatively, they can be executed by a computing device The program code is implemented so that they can be stored in the storage device by the computing device, or they can be made into individual integrated circuit modules, or a plurality of modules or steps can be made into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A method for adjusting a resource metric, comprising:

The self-organizing network determines the reference resource metric information according to the collected information reported by the base station according to a predetermined triggering mechanism;

The ad hoc network sends reference resource metric information of all or a portion of the sub-bands of the base station to the base station;

The base station adjusts resource metric values of all or part of the subbands according to the reference resource metric information.

The method according to claim 1, wherein the base station is all or part of base stations that perform signaling interaction with the ad hoc network.

The method according to claim 1, wherein the predetermined triggering mechanism comprises at least one of: a periodic trigger, triggered when the overall performance of the ad hoc network meets a first specific condition, in a network element Triggered when the performance meets the second specific condition.

The method according to claim 3, wherein the first specific condition and the second specific condition comprise at least one of: a threshold value smaller than a preset quality of service, less than a preset network The threshold value of the efficiency, the threshold value smaller than the preset throughput, the threshold value smaller than the preset cell coverage, and the threshold value smaller than the preset cell capacity.

The method according to claim 1, wherein the ad hoc network transmits the reference resource metric information to the base station in one of the following manners: an absolute value form, or a difference value form.

The method according to claim 5, wherein the absolute value is in the form of: transmitting an absolute value of the adjusted value in the reference resource metric information to a base station;

The difference is in the form of: transmitting, to the base station, a difference between the adjusted value in the reference resource metric information and the collected information reported by the base station.

The method according to any one of claims 1 to 4, wherein the collected information comprises at least one of: an identifier of the base station, a number of terminals connected to the base station, and a location distribution of the terminal. The information, the signal to interference and noise ratio of the terminal on all or part of the subband, the traffic load indication information of the base station on all or part of the subband, the converged resource metric value, and the interference strength indication information.

The method according to any one of claims 1 to 6, wherein the ad hoc network comprises at least one of: a network unit, a function module in the network unit;

The network unit includes at least one of the following: a base station, a server, an access service network element, a connection network element, and a core network element.

The method according to any one of claims 1 to 6, wherein the reference resource metric information of all or part of the sub-bands includes at least: price indication information of all or part of the sub-bands.

The method according to claim 1, wherein the method further comprises: sending, by the ad hoc network, a predetermined time for the base station to adjust the resource metric value to the base station by using signaling; Or

The predetermined time is set in advance, and the predetermined time is saved in the base station.

11. The method according to claim 1, wherein the reference resource metric information is determined according to formula 1:

Cost ^new = Cost. + step. x^L . (T. - Τ)

^'''W''(1 )

The ^{Co MW} is a resource metric value of the sub-band corresponding to the sub-band of the base station, and the ^cost ith is a resource metric τ value of the corresponding sub-band of the base station in the previous measurement interval, where ^3⁄4 is The convergence rate of ^ is the sub-band service load with sequence number i, which is the average value of all sub-band service loads of the base station, and 1 is the sequence number of the sub-band.

The method according to claim 1, wherein the determining the reference resource metric information comprises:

Determining, by the self-organizing network, an updated reference quantity ^Δ '· of the resource metric value of the corresponding sub-band of the base station according to formula 2, and transmitting the ^ to the base station:

A=^L.(T-T)

W' (2)

Where ^^ is the resource metric value of the sub-band corresponding to the sub-band in the last measurement interval, ^ f

The sub-band service load with sequence number i is the average value of all sub-band service loads of the base station, and i is the sequence number of the sub-band;

After receiving the A, the base station determines, according to the formula 3, a resource metric value of the sub-band corresponding to the sub-band in the next part of the frequency reuse parameter update time;

Cosf^ = Cost! + step! χΔ _; ( ₃ ) where Α is the updated reference quantity of the resource metric value corresponding to the sub-band of the base station, ^ is the update rate of the ^{e eW} corresponding to the sub-band ^, and i is the sub-band Serial number.

The method according to claim 1, wherein the self-organizing network determines the reference resource metric information according to formula 4, formula 5, and formula 6: τ=ί ^ ^τ ' (4)

Where ^ is the average value of the traffic load of the subbands in the last measurement interval of all the base stations in the self-organizing network, ^ is the sub-band service load with sequence number 1 in the base station with sequence number J, and 1 is the sequence number of the sub-band, j is the serial number of the base station in the self-organizing network;

τ =

^ ( 5 ) Where is the average value of ^ on all subbands, ^ is the average value of the traffic load of the subbands in the last measurement interval of all base stations in the ad hoc network, and i is the sequence number of the subband;

W ^new =W. +step.xi- Ti― T)

' ' Τ (6) where, is the sub-band ^ at the next part of the frequency reuse parameter update time, ^^

^W " ^W convergence rate, ^ is the subband of all base stations in the self-organizing network in the last measurement interval

The average of the traffic load of ^ is the average value of ^ on all subbands, and 1 is the sequence number of the subband.

The method according to claim 1, wherein the self-organizing network determines the reference resource metric information according to formula 4, formula 5, formula 6, and formula 7:

τ=ί ^ ^τ ' (4)

¹ ^ (5)

Where is the average value of ^ on all subbands, ^ is the average of the traffic loads of the subbands in the previous measurement interval of all base stations in the ad hoc network, and i is the sequence number of the subbands;

W ^new =W. +step.xi- Ti― T)

'' Τ (6) where, is the value of the sub-band ^ at the next part of the frequency reuse parameter update time, ^^ is the convergence rate of ^W " ^W , ^ is the base station of the self-organizing network in the last measurement interval The average value of the traffic load with ^ is the average value of all subbands, and 1 is the sequence number of the subbands;

Cos = Cost] + stepj (Τ/ - )

(7) among them,

The resource metric value at the time when the next part of the frequency reuse parameter is updated, ^ is the resource metric value of the sub-band corresponding to the sub-band of the sequence number j in the previous measurement interval, ^^ is the convergence rate of ^^^', which is the sub-band ^ In the next part of the frequency reuse parameter update time, ^ is the sub-band service load of the base station number i in the sequence number j, which is the average value of all sub-band service loads of the base station with sequence number J, and 1 is the sub-band The serial number, j is the serial number of the base station in the self-organizing network.

The method according to claim 1, wherein the self-organizing network determines the reference resource metric information according to Equation 8 and Equation 9:

Cost ¹ —

Co ^ewJ = Cost! + step ¹ x—— '- (T ^J ― )

' ^W i ' ( 8 ) where,

The reference value of the resource metric value at the time of the next partial frequency reuse parameter update, ^Ci ^ is the resource metric value of the sub-band corresponding to the base station of sequence number j in the previous measurement interval, which is the convergence rate of ^{cost ]} , and ^τ is the sequence number The sub-band service load with the sequence number i in the base station of j is the average value of all sub-band service loads of the base station with sequence number j, i is the sequence number of the sub-band, and j is the sequence number of the base station in the ad-hoc network;

Cost ^newJ

New Cost ^newJ = x- M

〉 newj

j Cost

7=1 ' where Wew _Co _S f is the resource metric value of the sub-band corresponding to the base station with sequence number j at the next part of the frequency reuse parameter update time, M is the number of base stations that exchange information with the ad hoc network, and i is the sub-band The serial number, j is the serial number of the base station in the self-organizing network.

The method according to claim 1, wherein the determining the reference resource metric information comprises: Determining, by the base station, the ^′ according to the formula 8, and reporting the ^′ to the self-organizing network;

Cost ¹ —

Co ^ewJ = Cost! + step ¹ x—— '- (T ^J ― )

' ^W i ' (8)

among them,

The self-organizing network determines the ^^^^^ according to formula 9;

Cost ^newJ

New Cost ^newJ = x- M

J= ^l ' (9)

Wherein, Wew_Co _S f is the resource metric value of the sub-band corresponding to the base station of sequence number j at the time of updating the next part of the frequency reuse parameter, Μ is the number of base stations that exchange information with the ad hoc network, i is the sequence number of the sub-band, j is The sequence number of the base station in the self-organizing network.

17. The method according to claim 1, wherein the ad hoc network determines the reference resource metric information according to formula 10:

New_Cost = {update information) ( ιο ) where update information is the information reported by each base station, and f Update info ti is a resource metric update algorithm that uses the information reported by each base station as a variable, Nw-( 3⁄4W is based on

Determine the subband corresponding to the base station with sequence number j The resource metric value at the time when the next part of the frequency reuse parameter is updated, i is the sequence number of the subband, and j is the sequence number of the base station in the ad hoc network.

The method according to claim 1, wherein after the base station adjusts the resource metric according to the reference resource metric information, the method further includes:

The base station performs a subsequent partial frequency multiplexing operation according to the obtained resource metric update value and the received partial frequency reuse information sent by the ad hoc network.

The method according to claim 18, wherein the partial frequency multiplexing information comprises at least one of: a division manner of the all or a portion of the subbands, and a power of the all or a portion of the subband division manners. The level, the base station relative load indication information, and the partial frequency reuse configuration information of the base station uniformly adjust the time indication information.

The method according to claim 19, wherein the performing the subsequent partial frequency multiplexing operation comprises:

Transmitting, by the base station, the resource metric value of the all or part of the subband to the terminal;

Obtaining, by the terminal, a spectral efficiency of each sub-band of the base station, determining a size of a predetermined value of each sub-band according to the spectrum efficiency and the resource metric value, and taking out M reservations according to a predetermined value from a large to a small order a value, and transmitting, to the base station, a channel quality information value of a subband corresponding to each of the M predetermined values, where M is a positive integer greater than or equal to 1;

And the base station performs resource allocation according to the channel quality information value, and adjusts the resource metric value of each subband, and sends the adjusted resource metric value to a terminal that belongs to the base station.

21. The method of claim 20, wherein the predetermined value is a ratio of a spectral efficiency to a resource metric value.

22. A method for adjusting a resource metric, comprising: The base station receives the performance optimization parameter information, where the performance optimization parameter information includes: at least: reference resource metric information of all or a part of the sub-bands of the base station, where the reference resource metric information includes at least: all or part of the sub-band Price indication information;

The base station adjusts a partial frequency reuse parameter according to the performance optimization parameter information.