Patent ID: 9042925
Filing Date: 2015-05-26
Classification: H04L,H04W

Abstract:
1. A method for reducing intercell interference in a heterogeneous network, wherein the heterogeneous network includes a first base station, which is a Home eNB (HeNB), and a second base station, which is a Macro eNB (MeNB), the first and second base stations being present together in an overlay manner, the method performed by the first base station and comprising: adjusting a boundary of a downlink subframe transmitted from the first base station to a first user equipment to be matched with a boundary of a downlink subframe received from the second base station to a second user equipment, based on time difference information received between boundaries of downlink subframes from the second user equipment, by a random access procedure from the second user equipment to the first base station, wherein the first user equipment is a Home User Equipment (HUE) served by the first base station and the second user equipment is a Macro User Equipment (MUE) served by the second base station and is located adjacent to the first base station; acquiring timing advance information indicating a time by which a boundary of an uplink subframe from the first user equipment to the first base station advances compared to the adjusted boundary of the downlink subframe; and notifying the first user equipment of a time point at which an uplink subframe is transmitted from the first user equipment to the first base station based on the acquired timing advance information, wherein the boundary of the uplink subframe transmitted from the notified first user equipment to the first base station and a boundary of an uplink subframe transmitted from the second user equipment to the second base station are matched with each other.