Method and apparatus for efficiently utilizing HARQ processes for semi-persistent and dynamic data transmissions
AssigneeInterDigital Patent Holdings, Inc.
InventorsJin Wang, Guodong Zhang
Life of this patent
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Abstract
A method and apparatus are disclosed for efficient hybrid automatic repeat request (HARQ) process utilization for semi-persistent and dynamic data transmissions, wherein a reserved HARQ process identification (ID) can be reused. A subset of a plurality of HARQ process IDs is reserved to use for a semi-persistent allocation, and data is transmitted based on the semi-persistent allocation. A dynamic allocation is received via a physical downlink control channel (PDCCH). At least one of the reserved HARQ process IDs is selectively used for transmitting data based on the dynamic allocation.
Claims20
A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
- receiving a radio resource control (RRC) message, the RRC message including configuration information that indicates one or more uplink hybrid automatic repeat request (HARQ) process identifications (IDs) for use with an uplink semi-persistent resource;
- receiving a first physical downlink control channel (PDCCH) transmission, the first PDCCH transmission activating the uplink semi-persistent resource for use by the WTRU;
- determining a first uplink HARQ process ID for a first uplink transmission using the uplink semi-persistent resource, wherein the first uplink HARQ process ID is one of the one or more uplink HARQ process IDs configured for use with the uplink semi-persistent resource, and the first uplink HARQ process ID is determined based at least in part on a system frame number (SFN) associated with the first uplink transmission;
- and
- receiving a second PDCCH transmission, the second PDCCH transmission comprising a dynamic uplink allocation associated with the first uplink HARQ process ID.
A wireless transmit/receive unit (WTRU) comprising a processor and memory, the processor and memory configured to:
- receive a radio resource control (RRC) message, the RRC message including configuration information that indicates one or more uplink hybrid automatic repeat request (HARQ) process identifications (IDs) for use with an uplink semi-persistent resource;
- receive a first physical downlink control channel (PDCCH) transmission, the first PDCCH transmission activating the uplink semi-persistent resource for use by the WTRU;
- determine a first uplink HARQ process ID for a first uplink transmission using the uplink semi-persistent resource, wherein the first uplink HARQ process ID is one of the one or more uplink HARQ process IDs configured for use with the uplink semi-persistent resource, and the first uplink HARQ process ID is determined based at least in part on a system frame number (SFN) associated with the first uplink transmission;
- and
- receive a second PDCCH transmission, the second PDCCH transmission comprising a dynamic uplink allocation associated with the first uplink HARQ process ID.
A base station comprising a processor and memory, the processor and memory configured to:
- send a radio resource control (RRC) message, the RRC message including configuration information that indicates one or more uplink hybrid automatic repeat request (HARQ) process identifications (IDs) for a wireless transmit/receive unit (WTRU) to use with an uplink semi-persistent resource;
- send a first physical downlink control channel (PDCCH) transmission, the first PDCCH transmission activating the uplink semi-persistent resource for use by the WTRU;
- determine a first uplink HARQ process ID for a first uplink transmission using the uplink semi-persistent resource, wherein the first uplink HARQ process ID is one of the one or more uplink HARQ process IDs configured for use with the uplink semi-persistent resource, and the first uplink HARQ process ID is determined based at least in part on a system frame number (SFN) associated with the first uplink transmission;
- and
- send a second PDCCH transmission, the second PDCCH transmission comprising a dynamic uplink allocation associated with the first uplink HARQ process ID.
Dependencies are inferred from the claim text.