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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Technologies
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Use Cases
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Claim
1. A wireless transmit/receive unit (WTRU) for using multiple component carriers, the WTRU comprising:
a memory; and
a processor, the processor being configured to:
receive a first signal that includes coded data via a first component carrier;
receive a second signal that includes the coded data via a second component carrier, the second signal being a different frequency than the first signal;
generate a combined signal by adding a first baseband signal from the first signal and a second baseband signal from the second signal; and
decode the coded data from the combined signal.
2. The WTRU of claim 1, wherein the processor is further configured to generate the combined signal such that a single receiver chain can be used to receive data from the combined signal.
3. The WTRU of claim 1, wherein the processor is further configured to decode the coded data from the combined signal by decoding the combined signal as if one signal had been received.
4. The WTRU of claim 1, wherein the processor is further configured to generate the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal by combining the first baseband signal and the second baseband signal based on a signal strength.
5. The WTRU of claim 1, wherein the processor is further configured to determine a first signal-to-noise ratio (SNR) for the first component carrier and a second SNR for the second component carrier.
6. The WTRU of claim 5, wherein the processor is further configured to:
determine a first signal weight for the first signal using the first SNR; and
determine a second signal weight for the second signal using the second SNR.
7. The WTRU of claim 6, wherein the processor is further configured to generate the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal by combining the first baseband signal and the second baseband signal into a single receiver chain based on the first signal weight and the second signal weight.
8. The WTRU of claim 6, wherein the first SNR is based on measurement from a common pilot channel (CPICH) or a high-speed shared control channel (HS-SCCH).
9. The WTRU of claim 5, wherein the processor is further configured to generate the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal by combining the first baseband signal and the second baseband signal into a single receiver chain based on the first SNR and the second SNR.
10. A method for a wireless transmit/receive unit (WTRU) to use multiple component carriers, the method comprising:
receiving, via the WTRU, a first signal that includes coded data via a first component carrier;
receiving, via the WTRU, a second signal that includes the coded data via a second component carrier, the second signal being a different frequency than the first signal;
generating, via the WTRU, a combined signal by adding a first baseband signal from using the first signal and a second baseband signal from the second signal; and
decoding, via the WTRU, the coded data from the combined signal.
11. The method of claim 10, wherein generating, via the WTRU, the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal further comprises generating the combined signal such that a single receiver chain can be used to receive data from the combined signal.
12. The method of claim 10, wherein decoding, via the WTRU, the coded data from the combined signal further comprises decoding the combined signal as if one signal had been received.
13. The method of claim 10, wherein generating, via the WTRU, the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal further comprises combining the first baseband signal and the second baseband signal based on a signal strength.
14. The method of claim 10, further comprising determining, via the WTRU, a first signal-to-noise ratio (SNR) for the first component carrier and a second SNR for the second component carrier.
15. The method of 14, further comprising:
determining, via the WTRU, a first signal weight for the first signal using the first SNR; and
determining, via the WTRU, a second signal weight for the second signal using the second SNR.
16. The method of claim 14, wherein generating, via the WTRU, the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal further comprises combining the first baseband signal and the second baseband signal into a single receiver chain based on the first SNR and the second SNR.
17. The method of claim 14, wherein the first SNR is based on measurement from a common pilot channel (CPICH) or a high-speed shared control channel (HS-SCCH).
18. A wireless transmit/receive unit (WTRU) for using multiple component carriers, the WTRU comprising:
a memory; and
a processor, the processor being configured to:
receive a first signal that includes coded data via a first component carrier;
receive a second signal that includes the coded data via a second component carrier, the second signal being a different frequency than the first signal;
determine a first signal-to-noise ratio (SNR) for the first component carrier and a second SNR for the second component carrier;
generate a combined signal by adding a first baseband signal from the first signal and a second baseband signal from the second signal; and
decode the coded data from the combined signal.
19. The WTRU of claim 18, wherein the processor is further configured to generate the combined signal by adding the first baseband signal from the first signal and the second baseband signal from the second signal by combining the first baseband signal and the second baseband signal into a single receiver chain based on the first SNR and the second SNR.
20. The WTRU of claim 18, wherein the first SNR is based on a measurement from a common pilot channel (CPICH) or a high-speed shared control channel (HS-SCCH).
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.