Methods and Devices for Configuring Uplink Transmission Diversity
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJohan Hultell, Paulson Angelo Vijay Silveris
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Abstract
Methods and devices are described whereby a User Equipment (UE) and a base station are configured to align the uplink (UL) closed-loop transmit diversity (CLTD) status of the UE and the base station during a serving cell change involving a new base station.
Claims10
A method of operation in a User Equipment (UE) configured for Uplink Closed-loop Transmit Diversity (UL CLTD), the method comprising setting a Precoding Control Information (PCI) vector to a default value in response to undergoing a serving cell change procedure that moves the UE to a new serving base station, the PCI vector comprising precoding weights used by the UE for UL CLTD.
A method of operation in a base station, the method comprising setting a Precoding Control Information (PCI) vector in the base station to a default value for use with a User Equipment (UE) moving to the base station in a serving cell change procedure, wherein the UE is operating in an Uplink (UL) Closed-loop Transmit Diversity (UL CLTD) configuration and the PCI vector represents precoding weights used by the UE in UL CLTD.
A User Equipment (UE) comprising:
- communication circuitry configured for wireless communicating with one or more base stations in a wireless communication network;
- and
- processing circuitry operatively associated with the communication circuitry and configured to set a Precoding Control Information (PCI) vector to a default value in response to undergoing a serving cell change procedure that moves the UE to a new serving base station, the PCI vector comprising precoding weights used by the UE for Uplink Closed-loop Transmit Diversity (UL CLTD) operation.
A base station configured for operation in a wireless communication network and comprising:
- communication circuitry configured for wirelessly communicating with User Equipments (UEs);
- and
- processing circuitry operatively associated with the communication circuitry and configured to set a Precoding Control Information (PCI) vector in the base station to a default value for use with a UE moving to the base station in a serving cell change procedure, wherein the UE is operating in an Uplink (UL) Closed-loop Transmit Diversity (UL CLTD) configuration and the PCI vector represents precoding weights used by the UE in UL CLTD.
Dependencies are inferred from the claim text.