CN113411869A

CN113411869A - Method for determining LTE power-saving cell, scheduling method and scheduling device

Info

Publication number: CN113411869A
Application number: CN202010185961.XA
Authority: CN
Inventors: 刘兵
Original assignee: Beijing Boco Inter Telecom Technology Co ltd
Current assignee: Beijing Boco Inter Telecom Technology Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-09-17

Abstract

The invention discloses a method for determining an LTE electricity-saving cell, which comprises the following steps: acquiring pilot frequency same-coverage cells of sectors of the same station and the same sky according to the network optimization parameters; acquiring the power-saving candidate cells with the same coverage area carrier frequency number more than or equal to a specific value in the pilot frequency same coverage area; acquiring a power-saving cell with the multi-layer network service volume lower than a preset value in the power-saving candidate cell according to the service volume of the power-saving candidate cell in a period; and acquiring a compensation cell and an energy-saving cell in the power-saving cell according to the frequency band of the power-saving cell. The invention also discloses a dispatching method and a dispatching device of the power-saving cell. The invention can realize the intelligent power-saving scheduling of the LTE cell and achieve the aim of saving energy and improving efficiency.

Description

Method for determining LTE power-saving cell, scheduling method and scheduling device

Technical Field

The invention belongs to the field of mobile communication networks, and particularly relates to an optimization technology of power-saving scheduling in an LTE network.

Background

In recent years, with the rapid increase of the number of network users and the data volume, operators build TD-LTE and WLAN networks on a large scale on the basis of the original GSM network. At the present stage, a mobile access network and a wireless access network of an operator comprise a plurality of networks of GSM, TD-SCDMA, TDD-LTE and FDD-LTE. The networks respectively have different coverage capabilities and service bearing capabilities, wherein a GSM network mainly bears voice and low-rate services, and a TDD-LTE network and an FDD-LTE network mainly bear high-speed data services and voice services. The network coverage form of multi-network coexistence and overlapping coverage provides better service for users, but also brings superposition of multi-network energy consumption.

In the existing network, the wireless equipment mainly adopts the base station to save electricity intelligently, and the proportion of the multi-density carrier frequency starting intelligent electricity saving function with hardware starting condition and economy reaches 100 percent. However, in practical popularization and application, we find that the intelligent power saving technology has the following four disadvantages:

1) the power saving effect is not thorough. The intelligent power-saving technology reduces power consumption by turning off a radio frequency module (mainly a power amplifier), but a base station needs to send broadcast information, so the intelligent power-saving technology is only suitable for service carrier frequency, and the energy-saving effect is about 10%; and because the power amplifier of the GSM multi-carrier base station simultaneously carries a plurality of carriers, the power can be saved only when the plurality of carriers are all in a low-load state, and the power saving effect of the GSM multi-carrier base station is further reduced.

2) The network overlaps the coverage area, causing redundancy cost when the service is idle. The multi-network multi-base station covers together, a large number of base stations have no telephone traffic at night, base station equipment operates normally, telephone traffic income cannot be brought, and the base stations continuously use electricity, so that a large amount of redundancy cost is caused.

3) The comprehensive analysis of the 4G power-saving cell is insufficient. At present, the main power-saving technology is symbol turn-off, channel turn-off, carrier frequency turn-off and cell turn-off, and the power-saving effect is gradually improved. The symbol turn-off, channel turn-off and carrier frequency turn-off belong to new functions of manufacturer equipment (after purchasing manufacturer License, the power saving effect is limited, and the power saving cost is increased). When the cell is switched off, the accurate judgment of the overlapped coverage cell of the multi-layer network of the same sector is lacked, and the energy-saving cell and the compensation cell which are covered by the same sector are lacked from the analysis of coverage, time, service dimension and other aspects. At present, single-dimension analysis is mainly carried out manually, and judgment on the energy-saving cell is not accurate enough.

4) The power saving technique is less efficient to implement practically. At present, the electricity saving is finished mainly by manual analysis and operation, the relevance is not strong, the analysis and execution efficiency is low, and the automatic analysis, the automatic monitoring and the automatic execution of large-batch electricity saving cells cannot be met. The power-saving cell analysis scheme lacks of standardized management means and flow and automatic analysis means for formulation, evaluation, execution and popularization.

Therefore, a technical scheme for achieving accurate energy saving by aiming at reducing network energy consumption and ensuring network quality and realizing automatic flow analysis is urgently needed.

Disclosure of Invention

The invention aims to provide a technical scheme for determining a power-saving cell and effectively and intelligently saving power. In order to achieve the above object, the present invention provides a method for determining an LTE power-saving cell, including:

acquiring pilot frequency same-coverage cells of sectors of the same station and the same sky according to the network optimization parameters;

acquiring the power-saving candidate cells with the same coverage area carrier frequency number more than or equal to a specific value in the pilot frequency same coverage area;

acquiring a power-saving cell with the multi-layer network service volume lower than a preset value in the power-saving candidate cell according to the service volume of the power-saving candidate cell in a period;

and acquiring a compensation cell and an energy-saving cell in the power-saving cell according to the frequency band of the power-saving cell.

Preferably:

acquiring a co-station pilot frequency cell according to the corresponding relation between the cell frequency band indication and the central carrier frequency in the network optimization parameter data;

according to the network optimization parameter, F, D frequency bands containing TDD-LTE in the pilot frequency cell are obtained, and two or more than two multi-frequency-band cells of FDD-LTE are pilot frequency same-coverage cells;

the longitude and latitude of the multi-band cell are consistent, and the deviation of the azimuth angle is smaller than a specific value.

Preferably:

and determining the service volume of the power-saving candidate cell in the period according to the utilization rate of the uplink PRB and the downlink PRB of the power-saving candidate cell in the period and the maximum number of RRC connected users.

Preferably:

determining the power-saving cells of a frequency band D and a frequency band FDD as power-saving cells, and determining the power-saving cells of the frequency band F as compensation cells;

and starting a cell turn-off function of the energy-saving cell.

The invention also provides a scheduling method of the LTE power-saving cell, which comprises the following steps:

setting power-saving scheduling data planning of a power-saving cell, wherein the power-saving scheduling data of the power-saving cell comprises cell information, power-saving parameters corresponding to the cell information, cell turn-off commands and cell turn-on commands corresponding to the cell information, and turn-off rules of the cell;

generating a cell power-saving command according to the power-saving cell power-saving scheduling data, creating a cell power-saving scheduling task containing the cell power-saving command, and setting task parameters;

and executing the power-saving scheduling task to the power-saving cell according to the task parameter.

Further, the turn-off rule of the cell specifically includes:

for the double-network layer cell, closing the frequency band D, reserving the frequency band F, and completing cell switching off when the double-network layer energy-saving cell is idle;

and for the multi-layer network cell, closing the FDD and the D frequency band, reserving the F frequency band, and completing the turn-off of the multi-layer network cell in idle time.

Preferably:

the task parameters comprise a target cell of the task, a switching-off rule of the cell and a periodic execution strategy.

The invention also discloses a scheduling device of the LTE electricity-saving cell, which comprises:

the power-saving cell determining unit is used for determining a power-saving cell according to the network optimization parameter data and the cell service volume;

the power-saving scheduling data planning unit is used for planning power-saving scheduling data of a cell, wherein the power-saving scheduling data of the cell comprises cell information, power-saving parameters corresponding to the cell information, cell turn-off commands and cell turn-on commands corresponding to the cell information and turn-off rules of the cell;

the dispatching task management unit is used for generating a cell power-saving command according to the cell power-saving dispatching data planned by the power-saving cell power-saving dispatching data planning unit, creating a cell power-saving dispatching task containing the cell power-saving command and setting task parameters;

and the execution unit is used for executing the cell power-saving scheduling task created by the scheduling task management unit.

Specifically, the power-saving cell determining unit further includes:

the pilot frequency same-coverage cell determining module is used for acquiring pilot frequency same-coverage cells of sectors of the same station and the same antenna according to the network optimization parameter data;

the power saving candidate cell determining module is used for determining the power saving candidate cells with the same coverage area carrier frequency number more than or equal to a specific value in the pilot frequency same coverage area according to the pilot frequency same coverage area carrier frequency number obtained by the pilot frequency same coverage area determining module;

the power saving cell determining module is used for acquiring a power saving cell of which the multi-layer network service volume is lower than a preset value in the power saving candidate cell according to the service volume of the power saving candidate cell determined by the power saving candidate cell determining module in a period;

and the electricity-saving cell classification module is used for acquiring a compensation cell and an energy-saving cell in the electricity-saving cell according to the frequency band of the electricity-saving cell.

Preferably, the method for determining the pilot frequency co-coverage cell by the pilot frequency co-coverage cell determining module specifically includes:

According to the invention, after the power-saving cell is obtained, the power-saving cell is divided into the energy-saving cell and the compensation cell, and the energy-saving cell is switched off and activated according to the switching-off rule through the set cell power-saving scheduling data plan, so that the purpose of energy saving of LTE is achieved; furthermore, intelligent and automatic power-saving scheduling is realized by issuing a power-saving scheduling task, and the switching-off and the activation of the cell are automatically realized according to the task content. The invention can greatly reduce the operation and maintenance cost of the LTE network and obtain better economic benefit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating a method for determining an LTE power-saving cell according to an embodiment of the present disclosure;

FIG. 2 is a flowchart of a method provided in a second embodiment of the present application;

fig. 3 is a schematic flowchart of a scheduling method for an LTE power-saving cell according to a third embodiment of the present application;

fig. 4 is a schematic structural diagram of a scheduling apparatus for an LTE power-saving cell according to a fourth embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The 4G network intelligent power saving refers to a technology for improving network energy efficiency through inter-network cooperation in a multi-network scene (TDD-LTE system D frequency band/F frequency band, FDD-LTE system), and specifically relates to a technology for reducing energy consumption by transferring energy-saving cell service to a compensation cell and deeply sleeping the energy-saving cell. The energy-saving cell is a cell with a service tide effect, and the compensation cell is a cell with an LTE base station overlapping coverage relation with the energy-saving cell. The relationship between the energy saving cell and the compensation cell is obtained by calculating the Coverage Correlation (Coverage Correlation) between cells.

And judging the overlapped coverage cell in the network by collecting and analyzing the measurement report and the network basic information of the 4G network, and dividing the overlapped coverage cell into LTE cell energy saving and LTE cell compensation.

(1) TDD-LTE (F frequency band cell) compensation-TDD-LTE (D frequency band cell energy saving)

(2) FDD-LTE (900M band cell) cell compensation-FDD-LTE (1800M band cell) cell energy saving.

After more than two network systems or LTE electricity-saving cells in frequency bands are found, automatic turn-off or turn-on is carried out in a specific time period so as to achieve the effect of energy conservation.

As shown in fig. 1, it is a flowchart of a method for determining an LTE power-saving cell according to the present invention, and the method includes the following steps:

step S01: and acquiring the pilot frequency same-coverage cells of the sectors of the same station and the same antenna according to the network optimization parameters.

The co-sited co-zenith sector must contain two or more than two multi-band cells of TDD-LTE (F, D frequency band) and FDD-LTE, namely a different-frequency co-coverage cell, wherein the multi-band cells have consistent longitude and latitude and have an azimuth deviation less than plus or minus 20 degrees.

And automatically synchronizing the work parameters of the network optimization platform, acquiring related data, and if the work parameters cannot be synchronized, importing the work parameters for analysis to ensure the accuracy of the work parameters. The cells in the same sector are the cells in the same coverage area.

Step S02: and acquiring the power-saving candidate cell with the same coverage area carrier frequency number more than or equal to a specific value in the pilot frequency same coverage area.

The specific value of the number of the carrier frequencies of the same coverage sector is more than or equal to 2, and the multi-layer network cells which are different in frequency and cover the same sky and are more than 2 carrier frequencies can be screened out according to the condition.

Step S03: and acquiring the power-saving cell with the multi-layer network service volume lower than a preset value in the power-saving candidate cell according to the service volume of the power-saving candidate cell in a period.

Whether the sector is in low traffic is judged by the set values of the utilization rate of the uplink PRB and the utilization rate of the downlink PRB and the maximum number of RRC connected users, the preset value can be set to be less than 50% for the utilization rate of the uplink PRB and the utilization rate of the downlink PRB, and the maximum number of RRC connected users can be set to be less than 100. Of course, the preset value can be modified according to the actual situation to meet the existing conditions.

The period for determining the traffic volume can be determined according to actual conditions, and can be a week, a month, a year, or minute and hour as a periodic unit.

The periodic energy-saving cell carries out service evaluation in a special designated time period (0: 00-06:00), carries out service volume evaluation on cells of the different-frequency multi-layer network according to a specific scene, evaluates the service change rule of the base station, classifies and classifies the base station, realizes 'idle-time' power utilization shutdown of the base station for long-term zero service stations, strong business rule points and service tide effect stations, and effectively reduces the power consumption of the base station.

Step S04: and acquiring a compensation cell and an energy-saving cell in the power-saving cell according to the frequency band of the power-saving cell.

The frequency band D cell and the frequency band FDD cell belong to energy-saving cells; the F-band cell belongs to a compensation cell.

The energy-saving cells in the same sector can be closed when the traffic is low.

And the compensation cell in the same sector is used for coverage control, and F1 in the F frequency band cell must exist to ensure normal coverage when the compensation cell is used as the compensation cell.

And determining the power-saving cell of the frequency band D and the frequency band FDD as an energy-saving cell, and determining the power-saving cell of the frequency band F as a compensation cell.

Therefore, the embodiment of the invention discloses a method for determining an LTE power-saving cell, which accurately obtains the target cells to be power-saved through multiple aspects of pilot frequency same coverage, cell service volume, cell frequency band and the like, and provides sufficient preparation for the LTE power saving under the condition of ensuring that the service is not influenced.

In order to better explain the present invention, a second embodiment is given to detail the method steps of how to determine the inter-frequency co-coverage cell, as shown in fig. 2.

Step S201: and acquiring the co-station pilot frequency cell according to the corresponding relation between the cell frequency band indication and the central carrier frequency in the network optimization parameter data.

The frequency band of each cell can be judged according to the corresponding relation between the frequency band indication of each cell and the central carrier frequency (MHz) (the cell is effective in resetting), and the categories of the same frequency and different frequency of the co-station multi-cell can be distinguished, so that the frequency bands of the co-station co-frequency multi-cell can be distinguished.

The corresponding relationship between the frequency points and the frequency bands (F1/F2/D1/D2/D3/E1/E2/E3) is shown in Table 1:

TABLE 1 frequency point and frequency band correspondence

Step S202: and obtaining F, D frequency bands containing TDD-LTE in the pilot frequency cell according to the network optimization parameters, and two or more than two multi-frequency band cells of FDD-LTE are pilot frequency co-coverage cells.

The longitude and latitude of the multi-band cell are consistent, and the deviation of the azimuth angle is smaller than a specific value. The specific value can be plus or minus 20 degrees, and can also be adjusted according to the actual situation, so that the optimal effect is achieved.

The co-sited co-zenith sector must contain two or more than two multi-band cells of TDD-LTE (F, D frequency band) and FDD-LTE, namely a different-frequency co-coverage cell, wherein the multi-band cells have consistent longitude and latitude and have an azimuth deviation less than plus or minus 20 degrees. (azimuth deviation is adjustable).

The cells in the same sector are the cells in the same coverage area.

Same sector judgment rule: the inter-frequency macro station spacing is less than 50 meters (belonging to a co-station inter-frequency cell), and the deviation of the cell azimuth angle is less than 20 degrees. Clockwise selecting a first cell from the azimuth angle of 0 degree, taking the first cell as a reference cell, and bringing the rest cells into a first same-coverage sector if the difference between the azimuth angle and the cell is within 20 degrees; and then, selecting a second cell clockwise, if the cell has the same coverage sector before, not considering the second cell, otherwise, taking the second cell as a second reference cell, and judging whether other cells have the same coverage with the reference cell.

The invention also discloses a scheduling method of the power-saving cell, and a third embodiment of the invention is given first, as shown in fig. 3.

Step S301, setting power-saving cell power-saving scheduling data plan, wherein the power-saving cell power-saving scheduling data includes cell information, power-saving parameters corresponding to the cell information, cell turn-off commands and cell turn-on commands corresponding to the cell information, and turn-off rules of cells.

The power saving parameter of the cell comprises basic information (cell identification, affiliated frequency band, base station sector information and the like) of the cell and a power saving mode.

The turn-off command of the cell is used for triggering the cell to turn off, and the turn-on command of the cell is used for activating the power utilization of the cell.

And for the double-network layer cell, closing the frequency band D, reserving the frequency band F, and completing cell turn-off when the double-network layer energy-saving cell is idle.

Because the network safety problem and the realization risk problem of closing the cell by an operator in the daytime are considered, the cell can be closed in idle time (0: 00-06:00), or the closing time of the cell can be set according to the service volume and the actual condition of the operator, the cell to be closed is regularly and automatically triggered, the automatic triggering closing analysis for 24 hours a day is carried out according to the service volume, and the one-time closing time period is more than 4 hours.

Step S302, generating a cell power saving command according to the power saving cell power saving scheduling data, creating a cell power saving scheduling task containing the cell power saving command, and setting task parameters.

Step S303, executing the power-saving scheduling task to the power-saving cell according to the task parameter.

And periodically executing a shutdown strategy on the target cell according to a shutdown rule according to the task parameters in the cell power-saving scheduling task.

It should be noted that, preferably, the power saving scheduling task may be created in an automatic or manual mode, an execution result is recorded, whether the execution is successful or not is recorded, a policy after the execution failure is set in the power saving scheduling task, a failure reason is output, an alarm is triggered, the power saving task is executed again, and the like.

The execution type can be set in the cell power-saving scheduling task: disposable and periodic. Once, the execution is performed immediately, and if the periodicity is selected, the execution is repeated in association with the scheduling period. And the execution result carries out result feedback and backspacing result feedback on the successfully executed task.

According to the invention, according to the existing network condition, the overlapped coverage cells of the same sector are intelligently judged, the combination judgment matching of the energy-saving cell and the compensation cell is carried out, the periodic idle and busy state of the network is accurately evaluated by combining the network characteristics of different time and space, the energy-saving cell and the compensation cell pair (basic cell and capacity cell) are identified, and various solutions of the energy-saving cell are output.

The invention can set the scheduling task of the cell with the periodic tidal effect and perform power-saving scheduling on the frequency band and the time interval of the power-saving cell.

The invention can also carry out data planning and command generation by matching the turn-off and turn-on of the power-saving cell according to a certain parameter planning rule. And (3) executing task establishment on commands (a turn-off command and an activation command) of the power-saving cell, periodically executing the commands, and timely backing back when an abnormal problem exists. And realizing the instruction configuration and execution management of the power-saving cell. The cell shutdown predicts the electricity saving amount calculation of one year for the base station of one area, can save larger electricity charge expenditure, greatly reduces the operation and maintenance cost, and obtains larger economic benefit.

The invention also discloses a scheduling device of the LTE power-saving cell, and a fourth embodiment of the invention is provided, as shown in FIG. 4.

And the power-saving cell determining unit 1 is used for determining the power-saving cell according to the network optimization parameter data and the cell traffic.

The power-saving cell determination unit further includes:

and a pilot frequency same-coverage cell determining module 11, configured to obtain the pilot frequency same-coverage cells of the co-station same-antenna sectors according to the network optimization parameters.

And acquiring the co-station pilot frequency cell according to the corresponding relation between the cell frequency band indication and the central carrier frequency in the network optimization parameter data.

And obtaining F, D frequency bands containing TDD-LTE in the pilot frequency cell according to the network optimization parameters, and two or more than two multi-frequency band cells of FDD-LTE are pilot frequency co-coverage cells.

A power saving candidate cell determining module 12, configured to determine, according to the power saving candidate cell whose number of same-coverage carrier frequencies in the pilot frequency same-coverage cell obtained by the pilot frequency same-coverage cell determining module is greater than or equal to a specific value;

a power saving cell determining module 13, configured to obtain a power saving cell with a multi-layer network traffic volume lower than a preset value in the power saving candidate cell according to the traffic volume of the power saving candidate cell in the period determined by the power saving candidate cell determining module;

and the power-saving cell classification module 14 is configured to acquire a compensation cell and an energy-saving cell in the power-saving cell according to the frequency band to which the power-saving cell belongs.

The cell power saving scheduling data planning unit 2 is configured to plan cell power saving scheduling data, where the cell power saving scheduling data includes cell information, power saving parameters corresponding to the cell information, a cell turn-off command and a cell turn-on command corresponding to the cell information, and a turn-off rule of a cell.

And the shutdown rule closes the frequency band D and reserves the frequency band F for the double-network-layer cell, and the double-network-layer energy-saving cell completes cell shutdown when being idle.

And the shutdown rule closes the FDD and the D frequency bands for the multi-layer network cell, reserves the F frequency band, and completes shutdown for the multi-layer network cell in idle time.

And the scheduling task management unit 3 is used for generating a cell power saving command according to the cell power saving scheduling data planned by the power saving cell power saving scheduling data planning unit, creating a cell power saving scheduling task containing the cell power saving command, and setting task parameters.

And the execution unit 4 is used for executing the cell power-saving scheduling task created by the scheduling task management unit.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the foregoing method may be referred to for the corresponding process in the above-described apparatus embodiment, and is not repeated herein.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be practiced in sequences other than those illustrated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining an LTE power-saving cell, the method comprising:

2. The method of claim 1, wherein the method for obtaining the inter-frequency co-coverage cells of the co-sited co-antenna sectors according to the network optimization parameters comprises:

3. The method of claim 2, further comprising:

4. The method of claim 3, wherein:

and starting a cell turn-off function of the energy-saving cell.

5. A scheduling method for an LTE power-saving cell, the method comprising:

setting a cell power-saving scheduling data plan, wherein the power-saving scheduling data of the cell comprises cell information, power-saving parameters corresponding to the cell information, cell turn-off commands and cell turn-on commands corresponding to the cell information, and turn-off rules of the cell;

6. The method according to claim 5, wherein the cell turn-off rule is specifically:

7. The method of claim 6, wherein:

8. An apparatus for scheduling an LTE power-saving cell, the apparatus comprising:

a cell power saving scheduling data planning unit, configured to plan the power saving scheduling data of the power saving cell, where the power saving scheduling data of the power saving cell includes cell information, power saving parameters corresponding to the cell information, a cell turn-off command and a cell turn-on command corresponding to the cell information, and a turn-off rule of the cell;

9. The apparatus of claim 8, wherein the power-saving cell determining unit further comprises:

10. The apparatus of claim 9, wherein the method for determining the inter-frequency co-coverage cell by the inter-frequency co-coverage cell determining module is specifically that: