Cell selection method in wireless network, base station, and user equipment

A base station, comprising:

• a first determining unit, configured to determine available uplink and downlink capacities of each cell in a plurality of cells covered by the base station, wherein the first determining unit being configured to determine the available uplink and downlink capacities of each cell in the plurality of cells covered by the base station comprises the first determining unit being configured to, for each cell, perform the following:
• perform grid division on the respective cell to determine a plurality of grids;
• determine a maximum capacity of the respective cell according to a system bandwidth, a service volume of each grid of the plurality of grids comprised in the respective cell, and a signal-to-noise ratio of a reference signal of each grid of the plurality of grids comprised in the respective cell;
• obtain uplink and downlink throughputs of the respective cell;
• and
• determine the available uplink and downlink capacities of the respective cell, wherein the available uplink capacity of the respective cell is a difference obtained by subtracting the uplink throughput of the respective cell from the maximum capacity of the respective cell, and the available downlink capacity of the respective cell is a difference obtained by subtracting the downlink throughput of the respective cell from the maximum capacity of the respective cell;
• a second determining unit, configured to determine available uplink and downlink capacities of a backhaul link of the base station;
• a calculation unit, configured to determine an uplink offset and a downlink offset of each cell according to the available uplink and downlink capacities of each cell and the available uplink and downlink capacities of the backhaul link of the base station;
• a statistics collecting unit, configured to determine an uplink path loss of user equipment (UE);
• and
• a sending unit, configured to send a message to the UE, wherein the message carries the uplink path loss of the UE, the determined uplink offset of each cell of the plurality of cells, and the determined downlink offset of each cell of the plurality of cells, wherein the uplink path loss of the UE, the determined uplink offset of each cell of the plurality of cells, and the determined downlink offset of each cell of the plurality of cells are used by the UE to perform cell selection.

A base station, comprising:

• a processor,
• a non-transitory memory;
• and
• an application program stored in the memory, wherein the application program comprises instructions used by the processor to perform the following process:
• determining available uplink and downlink capacities of each cell in a plurality of cells covered by the base station, wherein determining the available uplink and downlink capacities of each cell in the plurality of cells covered by the base station comprises, for each cell, performing the following:
• performing grid division on the respective cell to determine a plurality of grids;
• determining a maximum capacity of the respective cell according to a system bandwidth, a service volume of each grid of the plurality of grids comprised in the respective cell, and a signal-to-noise ratio of a reference signal of each grid of the plurality of grids comprised in the respective cell;
• obtaining uplink and downlink throughputs of the respective cell;
• and
• determining the available uplink and downlink capacities of the respective cell, wherein the available uplink capacity of the respective cell is a difference obtained by subtracting the uplink throughput of the respective cell from the maximum capacity of the respective cell, and the available downlink capacity of the respective cell is a difference obtained by subtracting the downlink throughput of the respective cell from the maximum capacity of the respective cell;
• determining available uplink and downlink capacities of a backhaul link of the base station;
• determining an uplink offset and a downlink offset of each cell according to the available uplink and downlink capacities of each cell and the available uplink and downlink capacities of the backhaul link of the base station;
• determining an uplink path loss of user equipment (UE);
• and
• sending a message to the UE, wherein the message carries the uplink path loss of the UE, the determined uplink offset of each cell of the plurality of cells, and the determined downlink offset of each cell of the plurality of cells, wherein the uplink path loss of the UE, the determined uplink offset of each cell of the plurality of cells, and the determined downlink offset of each cell the plurality of cells are used by the UE to perform cell selection.