Method, device, and system for optimizing a tradeoff between capacity and coverage of a network

A method for optimizing a tradeoff between capacity and coverage of a network, the method comprising:

• receiving, by a base station, coverage information sent by a user equipment UE;
• wherein the coverage information comprises coverage hole CH information and/or coverage overlap CO information, the CH information comprises a first base station identifier, the first base station identifier is used for identifying a base station with a CH detected by a UE that fails to establish a link, and the CO information comprises base station identifiers of at least two base stations with reference signal received power RSRP exceeding a first threshold value among all base stations identified by the UE;
• according to the coverage information, acquiring statistical information, and acquiring a first count;
• sending the statistical information and the first count to a network controller, so that the network controller establishes at least one coverage cluster according to the statistical information and the first count, learns an entire-network utility value, and determines, according to the entire-network utility value, whether a capacity or coverage weight and an antenna downtilt of each base station in all the coverage clusters need to be adjusted, if the adjustment is needed, the network controller acquires an adjustment value for the capacity or coverage weight of each base station and an adjustment value for the antenna downtilt of each base station according to an optimization strategy and sends the adjustment values to a corresponding base station, wherein the first count is the number of all UEs served in the base station, and the statistical information comprises information related to a coverage hole CH of the base station and/or information related to a coverage overlap CO of the base station;
• receiving the adjustment value for the capacity or coverage weight of each base station and the adjustment value for the antenna downtilt that are sent by the network coordination controller;
• if neither the adjustment value for the capacity or coverage weight nor the adjustment value for the antenna downtilt is zero, calculating the optimal pilot power according to the adjustment value for the capacity or coverage weight of each base station and the adjustment value for the antenna downtilt;
• and
• adjusting pilot power of the base station to the calculated optimal pilot power, and adjusting a value of the antenna downtilt to the adjustment value for the antenna downtilt, so as to adjust the capacity and coverage of the base station.

A network coordination controller, comprising:

• a processor;
• and
• memory coupled to the processor, the memory comprising instructions that, when executed by the processor, cause the network coordination controller to:
• receive statistical information and a first count that are sent by a base station, wherein the first count is the number of all user equipments (UEs) counted by the base station, the statistical information comprises information related to a coverage hole (CH) of the base station and/or information related to a coverage overlap (CO) of the base station;
• establish at least one coverage cluster according to the received statistical information, wherein the coverage cluster is used for recording a base station identifier related to the CH or a base station identifier related to the CO;
• calculate cluster values of all the coverage clusters according to the first count and the statistical information;
• wherein the cluster value is a CH value or a CO value of each coverage cluster;
• acquire an entire-network CH value and an entire-network CO value according to the cluster values of all the coverage clusters;
• calculate an entire-network utility value according to the entire-network CH value and the entire-network CO value;
• determine, according to the entire-network utility value, whether an antenna downtilt and a capacity or coverage weight of each base station in all the coverage clusters need to be adjusted;
• if the adjustment is needed, acquire an adjustment value for the antenna downtilt and an adjustment value for the capacity or coverage weight of each base station according to an optimization strategy;
• and
• send the acquired adjustment value for the antenna downtilt of each base station and the acquired adjustment value for the capacity or coverage weight of each base station to a corresponding base station, so that the base station calculates the optimal pilot power.

A base station, comprising:

• a processor;
• and
• memory coupled to the processor, the memory comprising instructions that, when executed by the processor, cause the base station to:
• receive coverage information sent by a user equipment (UE), wherein the coverage information comprises coverage hole (CH) information and/or coverage overlap (CO) information, the CH information comprises a first base station identifier, the first base station identifier is used for identifying a base station with a CH detected by a UE that fails to establish a link, and the CO information comprises base station identifiers of at least two base stations with reference signal received power (RSRP) exceeding a first threshold value among all base stations identified by the UE;
• according to the coverage information, acquire statistical information, and acquire a first count, wherein the first count is the number of all UEs served in the base station, the statistical information comprises information related to a coverage hole CH of the base station and/or information related to a coverage overlap CO of the base station;
• send the acquired statistical information and the acquired first count to a network coordination controller, so that the network controller establishes at least one coverage cluster according to the statistical information and the first count, learns an entire-network utility value, and determines, according to the entire-network utility value, whether a capacity or coverage weight and an antenna downtilt of each base station in all the coverage clusters need to be adjusted, if the adjustment is needed, acquires an adjustment value for the capacity or coverage weight of each base station and an adjustment value for the antenna downtilt of each base station according to an optimization strategy and sends the adjustment values to a corresponding base station;
• receive the adjustment value for the capacity or coverage weight and the adjustment value for the antenna downtilt that are sent by the network coordination controller;
• determine whether the adjustment value for the capacity or coverage weight and the adjustment value for the antenna downtilt are zero;
• if neither the adjustment value for the capacity or coverage weight nor the adjustment value for the antenna downtilt is zero, according to the adjustment value for the capacity or coverage weight and the adjustment value for the antenna downtilt, calculate the optimal pilot power;
• and
• adjust pilot power of the base station to the calculated optimal pilot power, and adjust a value of the antenna downtilt to the adjustment value for the antenna downtilt, so as to adjust the capacity and coverage of the base station.

A system for optimizing a tradeoff between capacity and coverage of a network, the system comprising:

• a network coordination controller and a base station, wherein:
• the network coordination controller is configured to:
• receive statistical information and a first count that are sent by a base station, wherein the first count is the number of all user equipments (UEs) counted by the base station, the statistical information comprises information related to a coverage hole (CH) of the base station and/or information related to a coverage overlap (CO) of the base station;
• establish at least one coverage cluster according to the received statistical information;
• calculate cluster values of all the coverage clusters according to the first count and the statistical information, wherein the coverage cluster is used for recording a base station identifier related to the CH or a base station identifier related to the CO, and the cluster value is a CH value or a CO value of each coverage cluster;
• acquire an entire-network CH value and an entire-network CO value according to the cluster values of all the coverage clusters;
• calculate an entire-network utility value according to the entire-network CH value and the entire-network CO value;
• determine, according to the entire-network utility value, whether a capacity or coverage weight and an antenna downtilt of each base station in all the coverage clusters need to be adjusted;
• if the adjustment is needed, acquire an adjustment value for the capacity or coverage weight of each base station and an adjustment value for the antenna downtilt of each base station according to an optimization strategy;
• and
• send the acquired adjustment value for the capacity or coverage weight of each base station and the acquired adjustment value for the antenna downtilt of each base station to a corresponding base station, so that the base station calculates the optimal pilot power;
• and the base station is configured to:
• receive coverage information sent by a user equipment UE, wherein the coverage information comprises coverage hole CH information and/or coverage overlap CO information, the CH information comprises a first base station identifier, the first base station identifier is used for identifying a base station with a CH detected by a UE that fails to establish a link, and the CO information comprises base station identifiers of at least two base stations with reference signal received power (RSRP) exceeding a first threshold value among all base stations identified by the UE;
• according to the coverage information:
• acquire statistical information, and acquire a first count;
• send the statistical information and the first count to a network controller, so that the network controller establishes at least one coverage cluster according to the statistical information and the first count, learns the entire-network utility value, and determines, according to the entire-network utility value, whether the capacity or coverage weight and the antenna downtilt of each base station in all the coverage clusters need to be adjusted, if the adjustment is needed, according to the optimization strategy, acquires the adjustment value for the capacity or coverage weight of each base station and the adjustment value for the antenna downtilt of each base station and sends the adjustment values to a corresponding base station, wherein the first count is the number of all UEs served in the base station, and the statistical information comprises the information related to the coverage hole CH and/or the information related to the coverage overlap CO of the base station;
• receive the adjustment value for the capacity or coverage weight and the adjustment value for the antenna downtilt sent by the network coordination controller;
• if neither the adjustment value for the capacity or coverage weight nor the adjustment value for the antenna downtilt is zero, according to the adjustment value for the capacity or coverage weight and the adjustment value for the antenna downtilt, calculate the optimal pilot power;
• and
• adjust pilot power of the base station to the calculated optimal pilot power, and adjust a value of the antenna downtilt to the adjustment value for the antenna downtilt, so as to adjust the capacity and coverage of the base station.