Method, system and apparatus for downlink shared channel reception in cooperative multipoint transmissions
AssigneeInterDigital Patent Holdings, Inc.
InventorsGuodong Zhang, Ghyslain Pelletier, Afshin Haghighat, Paul Marinier, Christopher Cave, Pascal M. Adjakple, Allan Y. Tsai
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Abstract
A method and apparatus may be used to enable reception of a downlink (DL) shared channel in a cooperative multipoint transmission (CoMP). The method and apparatus may determine whether CoMP is applied to a transmission. The method and apparatus may acquire other CoMP related information. The method and apparatus may apply to non-transparent CoMP scenarios.
Claims25
A method implemented in a wireless transmit/receive unit (WTRU) in communication with a plurality of transmission (Tx) points, comprising:
- receiving radio resource control (RRC) signaling including first and second parameters of a demodulation reference signals (DM-RS) configuration associated with the plurality of Tx points;
- receiving, on a downlink control channel associated with a forthcoming coordinated downlink transmission to the WTRU, downlink control information including a scrambling identity;
- on condition that the scrambling identity is a first value, generating a first DM-RS sequence for receiving DM-RS of the coordinated downlink transmission using the first parameter and the first value of the scrambling identity as inputs for initializing the first DM-RS sequence;
- and
- on condition that the scrambling identity is a second value, generating a second DM-RS sequence for receiving DM-RS of the coordinated downlink transmission using the second parameter and the second value of the scrambling identity as inputs for initializing the second DM-RS sequence.
A wireless transmit/receive unit (WTRU) comprising:
- a receiver configured to:
- receive radio resource control (RRC) signaling including first and second parameters of a demodulation reference signals (DM-RS) configuration associated with a plurality of transmission (Tx) points;
- and
- receive, on a downlink control channel associated with a forthcoming coordinated downlink transmission, downlink control information including a scrambling identity;
- and
- a processor configured to:
- on condition that the scrambling identity is a first value, generate a first DM-RS sequence for receiving DM-RS of the coordinated downlink transmission using the first parameter and the first value of the scrambling identity as inputs for initializing the first DM-RS sequence;
- and
- on condition that the scrambling identity is a second value, generate a second DM-RS sequence for receiving DM-RS of the coordinated downlink transmission using the second parameter and the second value of the scrambling identity as inputs for initializing the second DM-RS sequence.
Dependencies are inferred from the claim text.