METHOD AND APPARATUS FOR CHANNEL RESOURCE MAPPING IN CARRIER AGGREGATION

摘要

Methods and apparatus for preventing physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) ambiguities or collisions, for example, in a multi-carrier system or when transmitting multiple streams over multiple antennas, are described. Methods may include dividing resources or groups among multiple component carriers (CCs), using and assigning unused or vacant resources to CCs, forcing usage of adaptive HARQ processes in specified scenarios, setting a value for the cyclic shift of the corresponding uplink demodulation reference signals (DMRS) to a previous value for semi-persistent scheduling, and assigning a different first resource block for semi-persistent scheduling uplink resources and random access response grants for multiple CCs.

主权项

1. A method for physical HARQ indicator channel (PHICH) collision avoidance, performed by a base station, the method comprising:
allocating uplink (UL) physical resource blocks (PRBs) on a plurality of component carriers (CCs) to a wireless transmit/receive unit (WTRU); on a condition that lowest indices for the UL PRBs for each of the plurality of CCs are all different, performing hybrid automatic repeat request (HARQ) transmissions; and on a condition that at least two of the lowest indices for the UL PRBs for each of the plurality of CCs are the same:
triggering an adaptive HARQ process for each of the plurality of CCs; andtransmitting feedback for the adaptive HARQ process for each of the plurality of CCs on a physical downlink control channel (PDCCH).