Patent ID: 9647814
Date: 2017-05-09
CPC Classifications: H04L

Claim:
1. A method in a network control node for transmission of control channel signals in a wireless communication system, said wireless communication system employing scheduling of physical resource blocks used for each new transmission of a control channel signal, wherein each control channel signal is related to one or more control channel elements (CCEs); said method comprising: removing user specific reference signals in associated physical resource blocks if said associated physical resource blocks comprise at least one control channel signal; inserting the at least one control channel signal in said associated physical resource blocks; and transmitting said associated physical resource blocks; wherein said user specific reference signals are channel state indication reference signals (CSI-RS); wherein the removing the user specific reference signals further comprises: removing only a part of said user specific reference signals in said associated physical resource blocks, wherein said part of said user specific reference signals are related to one user and is known to said one user only.