HARQ process utilization in multiple carrier wireless communications
First Claim
1. A wireless transmit/receive unit (WTRU) comprising:
- at least one circuit configured to receive a first DCI format;
wherein the first DCI format is a legacy DCI format that does not include component carrier information;
wherein the at least one circuit is further configured to receive a configuration message from the network indicating that the WTRU is to receive at least one second DCI format indicating a component carrier out of a plurality of component carriers; and
wherein the at least one circuit is further configured to receive a DCI of the at least one second DCI format and to receive a HARQ transmission over the indicated carrier of the at least one second DCI format.
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Accused Products
Abstract
Methods and apparatus utilize hybrid automatic repeat request (HARQ) transmissions and retransmissions that are usable on multiple carriers, i.e. joint HARQ processes. For example, a downlink (DL) shared channel transmission of a joint HARQ process is received on one of the carriers. A first part of an identity of the joint HARQ process is determined by using HARQ process identity data received on a shared control channel. A second part of the joint HARQ process identity is determined using additional information. The joint HARQ process identity is then determined by combining the first part and the second part. A WTRU is provided that is configured to receive the DL shared channel and to make the aforementioned determinations. A variety of other methods and apparatus configurations are disclosed for utilizing joint HARQ processes, in particular in the context of DC-HSDPA.
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Citations
9 Claims
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1. A wireless transmit/receive unit (WTRU) comprising:
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at least one circuit configured to receive a first DCI format;
wherein the first DCI format is a legacy DCI format that does not include component carrier information;wherein the at least one circuit is further configured to receive a configuration message from the network indicating that the WTRU is to receive at least one second DCI format indicating a component carrier out of a plurality of component carriers; and wherein the at least one circuit is further configured to receive a DCI of the at least one second DCI format and to receive a HARQ transmission over the indicated carrier of the at least one second DCI format. - View Dependent Claims (2, 3)
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4. A method comprising:
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receiving, by a wireless transmit/receive unit (WTRU), a first DCI format; wherein the first DCI format is a legacy DCI format that does not include component carrier information; receiving, by the WTRU, a configuration message from the network indicating that the WTRU is to receive at least one second DCI format indicating a component carrier out of a plurality of component carriers; and in response to the configuration message, receiving, by the WTRU, the at least one second DCI format and receiving, by the WTRU, a HARQ transmission over the indicated carrier of the at least one second DCI format. - View Dependent Claims (5, 6)
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7. An evolved NodeB (eNB) comprising:
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at least one circuit configured to selectively transmit a first DCI format and a second DCI format to a wireless transmit/receive unit (WTRU);
wherein the first DCI format is a legacy DCI format that does not include component carrier information and the second DCI format includes information indicating a component carrier;wherein the at least one circuit is further configured to transmit a configuration message from the network indicating that the WTRU is to receive component carrier information; and wherein in response to transmitting the configuration message indicating that the WTRU is to receive component carrier information, the at least one circuit is further configured to transmit a DCI of the second DCI format to the WTRU and to transmit a HARQ transmission over the indicated carrier of the DCI of the second DCI format. - View Dependent Claims (8, 9)
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Specification