Patent ID: 9392633
Filing Date: 2016-07-12
CPC Classification: H04L,H04W

Claim Text:
1. An operating method of a terminal performed by the terminal, the method comprising: receiving a downlink reference signal from each of base stations; updating an uplink base station candidate group by adding the base stations to the uplink base station candidate group; measuring a strength of the downlink reference signal; selecting a first base station from among the base stations based on the measured strength; establishing a downlink cell association with the first base station; transmitting an uplink reference signal to the base stations in the uplink base station candidate group; receiving an identifier of a second base station providing an uplink from the first base station through a downlink, wherein the second base station is selected from among the base stations by the first base station; and establishing an uplink cell association with the second base station based on the identifier of the second base station.