Uplink Transmit diversity
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsJohan Bergman, Johan Hultell, Niklas Johansson, Erik Larsson
Life of this patent
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Abstract
The present invention discloses a method in a wireless access network node for controlling a UE. The UE comprises at least two transmit antennas, and is capable of uplink transmit diversity. There is an antenna weight associated with each transmit antenna. First, the wireless access network node determines that the antenna weights of the user equipment may be controlled. Then, it creates a control signal that comprises control information and transmits it to the user equipment. The control information controls a UE autonomous selection of the antenna weights in the UE.
Claims24
A method in a wireless access network node for controlling a user equipment, wherein the user equipment is capable of uplink transmit diversity and comprises at least two transmit antennas, wherein an antenna weight is associated with each transmit antenna, and wherein the method comprises:
- creating a control signal comprising control information that controls whether the user equipment is permitted to autonomously select the antenna weights;
- and
- transmitting the control signal to the user equipment.
A method in a user equipment configured to be used in a wireless access network and to be controlled by a wireless network node, wherein the user equipment is capable of uplink transmit diversity and comprises at least two transmit antennas, wherein an antenna weight is associated with each transmit antenna, and wherein the method comprises:
- receiving a control signal from the wireless network node, the control signal comprising control information that controls whether the user equipment is permitted to autonomously select the antenna weights;
- and
- based on the control information indicating that the user equipment is permitted to autonomously select antenna weights, performing autonomous selection of the antenna weights.
A method in a user equipment configured to be used in a wireless access network and to be controlled by a wireless network node, wherein the user equipment is capable of uplink transmit diversity and comprises at least two transmit antennas, wherein an antenna weight is associated with each transmit antenna, and wherein the method comprises:
- performing an autonomous selection of the antenna weights;
- and
- transmitting a control signal to the wireless network node, the control signal comprising information on an autonomous selection of the antenna weights.
A wireless access network node configured to control a user equipment that is capable of uplink diversity and comprises at least two transmit antennas, wherein an antenna weight is associated with each transmit antenna, wherein the wireless access network node comprises:
- a signal unit configured to create a control signal comprising control information that controls whether the user equipment is permitted to autonomously select the antenna weights;
- and
- a transmitter configured to transmit the control signal to the user equipment.
A user equipment configured to be used in a wireless access network and to be controlled by a wireless network node, wherein the user equipment is capable of uplink transmit diversity and comprises at least two transmit antennas, wherein an antenna weight is associated with each transmit antenna, and wherein the user equipment comprises:
- a receiver configured to receive a control signal from the wireless network node, the control signal comprising control information that controls whether the user equipment is permitted to autonomously select the antenna weights;
- and
- an antenna weight selector configured to, based on the control information indicating that the user equipment is permitted to autonomously select antenna weights, autonomously select the antenna weights.
Dependencies are inferred from the claim text.