Patent ID: 8913593

Claim:
A method comprising: a) transmitting, by a serving base station, in response to said serving base station making a handover decision for a wireless device, at least one first message to at least one target base station, said at least one first message comprising: i) one or more parameters implicitly or explicitly indicating whether said wireless device supports configuration of: (1) a maximum of k channel state information reference signals for a carrier, k being an integer greater than one; and (2) a maximum of n channel state information interference measurement resources for said carrier, n being an integer greater than one; and ii) configuration parameters of: (1) j channel state information reference signals for said carrier, j being an integer smaller than or equal to k; and (2) m channel state information interference measurement resources for said carrier, m being an integer smaller than or equal to n; b) receiving, by said serving base station, at least one second message from one of said at least one target base station, said at least one second message comprising configuration parameters of: i) p channel state information reference signals for said carrier, p being an integer smaller than or equal to k; and ii) q channel state information interference measurement resources for said carrier, q being an integer smaller than or equal to n; and c) transmitting, by said serving base station, in response to receiving said at least one second message, a third message to said wireless device, said third message comprising said configuration parameters of: i) said p channel state information reference signals; and ii) said q channel state information interference measurement resources.