METHOD FOR OBTAINING UPLINK SYNCHRONIZATION AND CONFIGURING UPLINK CONNECTION

摘要

Disclosed are a terminal, which receives a downlink signal from a plurality of RRHs, transmits a random access preamble to any one target RRH in which the intensity of the received downlink signal among the plurality of RRHs is greater than or equal to a threshold value, receives a random access response message indicating that an uplink connection to a selected RRH will be configured on the basis of difference of a reception power of a random access preamble received by the target RRH and a reception power of a random access preamble which is overheard by a neighborhood RRH adjacent to the target RRH, and configures an uplink connection to the selected RRH, and an uplink connection configuration method thereof.

主权项

1. A method of configuring an uplink connection, which is configured by a user equipment with a BBU in a cloud radio access network (C-RAN) environment in which a remote radio head (RRH) and a baseband unit (BBU) are separated from each other, comprising the steps of:
receiving a downlink signal from a plurality of RRHs; transmitting a random access preamble to a target RRH of which strength of the received downlink signal is equal to or greater than a threshold value among a plurality of the RRHs; receiving a random access response message for indicating to configure an uplink connection with an RRH which is selected based on a difference between reception power of the random access preamble received by the target RRH and reception power of the random access preamble overheard by a neighboring RRH adjacent to the target RRH; and configuring an uplink connection with the selected RRH.