Patent ID: 9491652
Filing Date: 2016-11-08
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method for performing measurement reporting at a User Equipment (UE) in a wireless communication system, the method comprising: receiving, from a serving cell, a neighboring cell list; measuring channel state information (CSI) using a first CSI-reference signal (CSI-RS) from the serving cell; reporting a result of the CSI measurement to the serving cell; measuring radio resource management (RRM) using a second CSI-RS from a neighboring cell; reporting a result of the RRM measurement to the serving cell; and transmitting a random access preamble to a neighboring cell based on an equation min{Pcmax, PRTP+PLc}, where Pcmax is maximum transmission power allowed to the UE, PRTP is preamble received target power, and PLc is pathloss determined based on a result of the RRM measurement of the second CSI-RS, wherein the first CSI-RS and the second CSI-RS belong to a specific CSI-RS configuration and are transmitted with different CSI-RS antenna port numbers of the specific CSI-RS configuration by the serving cell and the neighboring cell respectively, and wherein the serving cell and the neighboring cell are distinguished from each other by the different CSI-RS antenna port numbers, the different CSI-RS antenna port numbers being signaled by the neighbor cell list.