Method and apparatus for allocating resources for an enhanced physical hybrid automatic repeat request indicator channel
First Claim
1. A wireless transmit/receive unit (WTRU) comprising:
- a processor; and
a transceiver,wherein the processor and the transceiver are configured to transmit data over a physical uplink shared channel (PUSCH) using hybrid automatic repeat request (HARQ) processing,wherein the processor and the transceiver are further configured to monitor only first physical downlink control channel (PDCCH) control channel elements (CCEs) in a subframe for scheduling information for retransmissions, wherein the subframe further includes second PDCCH CCEs and physical HARQ indicator channel (PHICH) resource groups, wherein a number of resource elements for the first PDCCH CCEs is based on a size of a control region associated with the second PDCCH CCEs, andwherein the processor and the transceiver are further configured to determine to retransmit the data using HARQ processing on a condition that scheduling information for a retransmission is received on the first PDCCH CCEs in the subframe.
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Abstract
A method and apparatus are described for allocating resources for an enhanced physical hybrid automatic repeat request (HARQ) channel (E-PHICH). A subset of an enhanced physical downlink control channel (E-PDCCH) may be allocated for use by the E-PHICH. The E-PDCCH may be defined by at least one of enhanced resource element groups (eREGs) and enhanced control channel elements (eCCEs). Each eCCE may be formed by grouping a plurality of eREGs. Each eREG may contain at least one resource element (RE). Alternatively, a subset of eREGs may be allocated as E-PHICH resources. E-PDCCH physical resource block (PRB) pairs may be selected as a resource for the E-PHICH. An indication of the number of the eCCEs may be broadcast to a wireless transmit/receive unit (WTRU).
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Citations
12 Claims
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1. A wireless transmit/receive unit (WTRU) comprising:
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a processor; and a transceiver, wherein the processor and the transceiver are configured to transmit data over a physical uplink shared channel (PUSCH) using hybrid automatic repeat request (HARQ) processing, wherein the processor and the transceiver are further configured to monitor only first physical downlink control channel (PDCCH) control channel elements (CCEs) in a subframe for scheduling information for retransmissions, wherein the subframe further includes second PDCCH CCEs and physical HARQ indicator channel (PHICH) resource groups, wherein a number of resource elements for the first PDCCH CCEs is based on a size of a control region associated with the second PDCCH CCEs, and wherein the processor and the transceiver are further configured to determine to retransmit the data using HARQ processing on a condition that scheduling information for a retransmission is received on the first PDCCH CCEs in the subframe. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, implemented in a wireless transmit/receive unit (WTRU), the method comprising:
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transmitting data over a physical uplink shared channel (PUSCH) using hybrid automatic repeat request (HARQ) processing; monitoring only first physical downlink control channel (PDCCH) control channel elements (CCEs) in a subframe for scheduling information for retransmissions, wherein the subframes further includes second PDCCH CCEs and physical HARQ indicator channel (PHICH) resource groups, wherein a number of resource elements for the first PDCCH CCEs is based on a size of a control region associated with the second PDCCH CCEs; and determining to retransmit the data using HARQ processing on a condition that scheduling information for a retransmission is received on the first PDCCH CCEs in the subframe. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification