Patent ID: 8363547

Claim:
A communication method in a mobile communication system in which a plurality of base stations are capable of receiving data having the same contents from one mobile station, and a first and second selection devices are capable of performing selective combination of data that are received from a mobile station via the base stations and that have the same contents, the communication method comprising; monitoring in the first selection device whether the line between the first selection device and the second selection device is congested; when the line is congested, sending the result obtained by performing the selective combination of data received from the mobile station via the base stations, to the second selection device from the first selection device, and when the line is not congested, sending data received from the mobile station via the base stations, to the second selection device from the first selection device without performing the selective combination, wherein the communication method further comprising: controlling whether or not to perform the selective combination of the data for each mobile station based on the congestion state of the line and the controlling step includes: monitoring the amount of flow over the line for each mobile station; in the first selection device and based on that amount of flow, controlling whether or not to perform the selective combination for each mobile station.