Uplink signaling for cooperative multipoint communication
AssigneeTexas Instruments Incorporated
InventorsAnthony Ekpenyong, Ralf Bendlin, Runhua Chen
Life of this patent
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Abstract
A method of operating a wireless communication system is disclosed (FIG. 6). The method includes receiving a virtual cell identification (VCID) parameter (600) from a remote transmitter. A base sequence index (BSI) and a cyclic shift hopping (CSH) parameter (604,606) are determined in response to the VCID. A pseudo-random sequence is selected in response to the BSI and CSH (610,612). A reference signal is generated using the selected pseudo-random sequence (614).
Claims3
A method of operating a wireless communication apparatus, comprising:
- receiving a signal from a base station;
- selecting a cell-specific parameter in response to a first state of the signal, or a user-specific parameter in response to a second state of the signal, wherein the user-specific parameter is a virtual cell identification parameter;
- initializing a first pseudo-random sequence generator for generating a base sequence with the virtual cell identification parameter;
- initializing a second pseudo-random sequence generator for generating a cyclic shift hopping sequence with the virtual cell identification parameter;
- generating an uplink reference signal in response to the selected parameter;
- and
- transmitting the uplink reference signal generated from the base sequence and the cyclic shift hopping sequence.
A method of operating a wireless communication apparatus, comprising:
- receiving a signal from a base station;
- determining if a physical uplink control channel (PUCCH) or sounding reference signal (SRS) ID, nID is present in the signal;
- initializing a pseudo-random number generator for a base sequence group, sequence and cyclic shift hopping sequence with nID when nID is present in the signal;
- initializing a pseudo-random number generator for a base sequence group, sequence and cyclic shift hopping sequence with a Physical Cell Identification (PCID) associated with the base station when nID is not present in the signal;
- selecting a cell-specific parameter in response to a first state of the signal or a user-specific parameter in response to a second state of the signal;
- and
- generating an uplink reference signal in response to the selected parameter.
Dependencies are inferred from the claim text.