Supporting enhanced uplink transmission during soft handover
An enhanced uplink user equipment is in soft handover. A radio network controller selects a primary Node-B out of a plurality of Node-Bs supporting the soft handover. The radio network controller receiving successfully received enhanced uplink data packets from the plurality of Node-Bs. The radio network controller reordered the successfully received enhanced uplink data packets for in-sequence deliver. The primary Node-B sends specified scheduling information to the user equipment that the other Node-Bs does not transmit. At least the primary Node-B transmits acknowledgements and negative acknowledgements to the user equipment.
1. A method for communicating by a wireless transmit/receive unit (WTRU) during a handover, the method comprising:
transmitting, via a primary cell and at least one non-primary cell, enhanced uplink (EU) data from the WTRU to a Node-B;
receiving scheduling information from the Node-B via the primary cell only; and
receiving hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell and negative acknowledgements (NACKs) from the Node-B via the primary cell only.
2. The method of claim 1 , further comprising:
receiving an identifier indicating the primary cell and the at least one non-primary cell.
3. The method of claim 1 , further comprising:
transmitting downlink power measurements of transmissions received by the WTRU.
4. The method of claim 1 , wherein the EU data includes identification information of the WTRU.
5. The method of claim 1 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the WTRU.
6. The method of claim 1 , further comprising:
transmitting the EU data using synchronous HARQ.
7. The method of claim 1 , wherein the EU data is transmitted in accordance with the received scheduling information.
8. The method of claim 1 , wherein the primary cell and the at least one non-primary cell are served by the same Node-B.
9. The method of claim 1 , further comprising:
retransmitting the EU data from the WTRU to the Node-B upon receipt of a NACK from the Node-B via the primary cell only.
10. A wireless transmit/receive unit (WTRU), comprising:
a transmitter; and
a receiver,
wherein the WTRU is in a handover;
wherein the transmitter transmits, via a primary cell and at least one non-primary cell, enhanced uplink (EU) data to a Node-B;
wherein the receiver receives scheduling information from the Node-B via the primary cell only; and
wherein the receiver receives hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell and negative acknowledgements (NACKs) from the Node-B via the primary cell only.
11. The WTRU of claim 10 , wherein the receiver receives an identifier indicating the primary cell and the at least one non-primary cell.
12. The WTRU of claim 10 , wherein the transmitter transmits downlink power measurements of transmissions received by the receiver.
13. The WTRU of claim 10 , wherein the EU data includes identification information of the WTRU.
14. The WTRU of claim 10 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the transmitter.
15. The WTRU of claim 10 , wherein the transmitter transmits the EU data using synchronous HARQ.
16. The WTRU of claim 10 , wherein the transmitter transmits the EU data in accordance with the received scheduling information.
17. The WTRU of claim 10 , wherein the primary cell and the at least one non-primary cell are served by the same Node-B.
18. The WTRU of claim 10 , wherein the EU data is retransmitted from the WTRU to the Node-B upon receipt of a NACK.
19. A wireless transmit/receive unit (WTRU), comprising:
a transmitter; and
a receiver,
wherein the WTRU is in a handover;
wherein the transmitter transmits, via a primary cell and at least one non-primary cell, enhanced uplink (EU) data to a Node-B; and
wherein the receiver receives scheduling information from the Node-B, and the transmitter transmits the EU data transmission in accordance with the scheduling information received from the Node B via the primary cell only;
wherein the receiver receives hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell and negative acknowledgements (NACKs) from the Node-B via the primary cell only.
20. The WTRU of claim 19 , wherein the receiver receives an identifier indicating the primary cell and the at least one non-primary cell.
21. The WTRU of claim 19 , wherein the transmitter transmits downlink power measurements of transmissions received by the receiver.
22. The WTRU of claim 19 , wherein the EU data includes identification information of the WTRU.
23. The WTRU of claim 19 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the transmitter.
24. The WTRU of claim 19 , wherein the transmitter transmits the EU data using synchronous HARQ.
25. The WTRU of claim 19 , wherein the primary cell and the at least one non-primary cell are served by the same Node-B.
26. The WTRU of claim 19 , wherein the EU data is retransmitted from the WTRU.
27. A method for communicating by a wireless transmit/receive unit (WTRU) during a handover, the method comprising:
receiving scheduling information from a Node-B;
transmitting, via a primary cell and at least one non-primary cell controlled by the Node-B, enhanced uplink (EU) data to the Node-B in accordance with the scheduling information received from the Node-B via the primary cell only; and
receiving hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell and negative acknowledgements (NACKs) from the Node-B via the primary cell only.
28. The method of claim 27 , further comprising:
receiving an identifier indicating the primary cell and the at least one non-primary cell.
29. The method of claim 27 , further comprising:
transmitting downlink power measurements of transmissions received by the WTRU.
30. The method of claim 27 , wherein the EU data includes identification information of the WTRU.
31. The method of claim 27 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the WTRU.
32. The method of claim 27 , further comprising:
transmitting the EU data using synchronous HARQ.
33. The method of claim 27 , further comprising:
retransmitting the EU data from the WTRU to the Node-B upon receipt of a NACK.
34. A method for communicating by a wireless transmit/receive unit (WTRU) during a handover, the method comprising:
transmitting, via a first cell and at least one second cell, enhanced uplink (EU) data from the WTRU to a Node-B;
receiving scheduling information from the Node-B via the first cell only; and
receiving hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the first cell and negative acknowledgements (NACKs) from the Node-B via the first cell only.
35. The method of claim 34 , further comprising:
receiving an identifier indicating the first cell and the at least one second cell.
36. The method of claim 34 , further comprising:
transmitting downlink power measurements of transmissions received by the WTRU.
37. The method of claim 34 , wherein the EU data includes identification information of the WTRU.
38. The method of claim 34 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the WTRU.
39. The method of claim 34 , further comprising:
transmitting the EU data using synchronous HARQ.
40. The method of claim 34 , wherein the EU data is transmitted in accordance with the received scheduling information.
41. The method of claim 34 , wherein the first cell and the second cell are served by the same Node-B.
42. The method of claim 34 , further comprising:
retransmitting the EU data from the WTRU to the Node-B upon receipt of a NACK.
43. A wireless transmit/receive unit (WTRU), comprising:
a receiver; and
a transmitter,
wherein when the WTRU is in a handover,
the receiver receives scheduling information from the Node-B via a primary cell only,
the transmitter transmits, via the primary cell and at least one non-primary cell, enhanced uplink (EU) data to a Node-B,
the receiver receives hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell, and
the receiver receives negative acknowledgements (NACKs) from the Node-B via the primary cell only.
44. The WTRU of claim 43 , wherein the EU data is retransmitted from the WTRU to the Node-B upon receipt of a NACK.
45. The WTRU of claim 43 , wherein the receiver receives an identifier indicating the primary cell and the at least one non-primary cell.
46. The WTRU of claim 43 , wherein the transmitter transmits downlink power measurements of transmissions received by the receiver.
47. The WTRU of claim 43 , wherein the EU data includes identification information of the WTRU.
48. The WTRU of claim 43 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the transmitter.
49. The WTRU of claim 43 , wherein the transmitter transmits the EU data using synchronous HARQ.
50. The WTRU of claim 43 , wherein the transmitter transmits in accordance with the received scheduling information.
51. The WTRU of claim 43 , wherein the primary cell and the at least one non-primary cell are served by the same Node-B.
52. A method of operating in a wireless network during a handover, the method comprising:
receiving scheduling information at a wireless/transmit receive unit (WTRU) from a Node-B via the primary cell only;
transmitting, via the primary cell and at least one non-primary cell, enhanced uplink (EU) data from the WTRU to the Node-B; and
receiving hybrid automatic repeat request (HARQ) acknowledgements (ACKs) from the Node-B via at least the primary cell and negative acknowledgements (NACKs) from the Node-B via the primary cell only.
53. The method of claim 52 , further comprising:
retransmitting the EU data from the WTRU to the Node-B upon receipt of a NACK from the Node-B via the primary cell only.
54. The method of claim 52 , further comprising:
receiving an identifier indicating the primary cell and the at least one non-primary cell.
55. The method of claim 52 , further comprising:
transmitting downlink power measurements of transmissions received by the WTRU.
56. The method of claim 52 , wherein the EU data includes identification information of the WTRU.
57. The method of claim 52 , wherein the scheduling information includes at least one of a HARQ process identification and a transmit power level of the WTRU.
58. The method of claim 52 , further comprising:
transmitting the EU data using synchronous HARQ.
59. The method of claim 52 , further comprising:
transmitting in accordance with the received scheduling information.
60. The method of claim 52 , wherein the primary cell and the at least one non-primary cell are served by the same Node-B.