Methods for transmission time interval bundling in the uplink
Methods, systems, and apparatus for supporting uplink Transmission Time Interval (TTI) bundling in Long Term Evolution (LTE) are provided. Methods, systems, and apparatus for signaling, activation/deactivation, and wireless transmit/receive unit (WTRU) behavior are also provided.
1. A wireless transmit/receive unit (WTRU), the WTRU comprising:
a memory, and;
a processor, the processor being configured to:
receive, via a radio resource control (RRC) message, configuration information indicating that bundled transmissions are enabled for persistent scheduling;
determine a set of redundancy version (RV) values to be used for a bundled physical uplink shared channel (PUSCH) transmission; and
send the bundled PUSCH transmission in accordance with the set of RV values.
2. The WTRU of claim 1 , wherein a frequency hopping pattern is used for the bundled PUSCH transmission.
3. The WTRU of claim 1 , wherein the set of RV values are indicated in the configuration information received via the RRC message.
4. The WTRU of claim 3 , wherein the set of RV values are used for at least two transmission opportunities in the bundled PUSCH transmission.
5. The WTRU of claim 1 , wherein the processor is further configured to cancel a retransmission associated with the bundled PUSCH transmission when the retransmission would collide with a subsequent bundled PUSCH transmission.
6. The WTRU of claim 1 , wherein the processor is further configured to determine one or more resource blocks associated with the bundled PUSCH transmission.
7. The WTRU of claim 6 , wherein the processor is further configured to determine the one or more resource blocks associated with the bundled PUSCH transmission by receiving, via a physical downlink control channel (PDCCH), a resource allocation for retransmission.
8. A wireless transmit/receive unit (WTRU) for sending a bundled transmission, the WTRU comprising:
a processor, the processor being configured to:
receive, via a radio resource control (RRC) message, configuration information indicating that bundled transmissions are enabled for persistent scheduling;
determine a set of redundancy version (RV) values to be used for a first bundled physical uplink shared channel (PUSCH) transmission; and
send the first bundled PUSCH transmission in accordance with the set of RV values when it is determined that the first bundled PUSCH transmission would avoid colliding with a second bundled PUSCH transmission.
9. The WTRU of claim 8 , wherein a frequency hopping pattern is used for the first bundled PUSCH transmission.
10. The WTRU of claim 8 , wherein the set of RV values are indicated in the configuration information received via the RRC message.
11. The WTRU of claim 10 , wherein the set of RV values are used for at least two transmission opportunities in the first bundled PUSCH transmission.
12. The WTRU of claim 8 , wherein the processor is further configured to cancel a retransmission associated with the first bundled PUSCH transmission when it is determined that the retransmission would collide with a subsequent bundled PUSCH transmission.
13. The WTRU of claim 8 , wherein the processor is further configured to determine one or more resource blocks associated with the first bundled PUSCH transmission.
14. The WTRU of claim 13 , wherein the processor is further configured to determine the one or more resource blocks associated with the first bundled PUSCH transmission by receiving, via a physical downlink control channel (PDCCH), a resource allocation for retransmission.
15. A method performed by a wireless transmit/receive unit for sending a bundled transmission, the method comprising:
receiving, via a wireless transmit/receive unit (WTRU), a radio resource control (RRC) message that includes configuration information indicating that bundled transmissions are enabled for persistent scheduling;
determining a set of redundancy version (RV) values to be used for a bundled physical uplink shared channel (PUSCH) transmission; and
sending the bundled PUSCH transmission in accordance with the set of RV values.
16. The method of claim 15 , wherein a frequency hopping pattern is used for the bundled PUSCH transmission.
17. The method claim 15 , wherein the set of RV values are indicated in the configuration information received via the RRC message.
18. The method of claim 16 , wherein the set of RV values are used for at least two transmission opportunities in the bundled PUSCH transmission.
19. The method claim 15 , further comprising canceling a retransmission associated with the bundled PUSCH transmission when the retransmission would collide with a subsequent PUSCH transmission.
20. The method of claim 15 , further comprising determining one or more resource blocks to be used for the bundled PUSCH transmission by receiving, via a physical downlink control channel (PDCCH), a resource allocation for retransmission.
21. The WTRU of claim 1 , wherein a bundled transmission is a transmission spanning multiple transport blocks transmitted during consecutive transmission opportunities.
22. The WTRU of claim 8 , wherein a bundled transmission is a transmission spanning multiple transport blocks transmitted during consecutive transmission opportunities.
23. The method of claim 15 , wherein a bundled transmission is a transmission spanning multiple transport blocks transmitted during consecutive transmission opportunities.