Patent ID: 9504022
Filing Date: 2016-11-22
CPC Classification: H04B,H04W

Claim Text:
1. A method in a radio network controller of a wideband code division multiple access (WCDMA) radio system, the radio system comprising a mixture of radio base stations of a first type that are capable of decoding transmissions in a first control channel format in an uplink multi-antenna transmission from a user equipment (UE) and radio base stations of a second type that are not capable of decoding transmissions in said first control channel format in an uplink multi-antenna transmission from the UE, the UE being connected to an active set of cells, the method comprising: in response to an addition of a cell belonging to a radio base station of the second type to the active set of the UE, configuring uplink transmission of at least one transmit antenna of the UE to use a second control channel format that can be decoded by radio base stations of both the first and second types, wherein the uplink multi-antenna transmission is uplink (UL) Multiple-Input Multiple-Output (MIMO) or uplink Beam Forming Transmit Diversity (BFTD), and wherein the radio network controller configures a radio base station of the second type to not transmit UL Transmission Power Control (TPC) commands to a UE operating in UL MIMO or UL BLTD mode.