Method and apparatus for maintaining communication during a baton handover

1. A method of wireless communication, comprising:

switching an uplink from a source cell to a target cell while maintaining a downlink with the source cell, wherein the uplink on the source cell is no longer being actively utilized after the switching; and

transmitting directly over the uplink to the target cell at least one metric of quality of the downlink.

2. The method of claim 1 , wherein the uplink comprises a high speed shared information channel (HS-SICH) between a user equipment (UE) and a respective cell, and the downlink comprises a high speed physical downlink shared channel (HS-PDSCH) and a high speed shared control channel (HS-SCCH).

3. The method of claim 1 , wherein the at least one metric of quality of the downlink corresponds to a signal power or an amount of signal interference of the downlink from the source cell.

4. The method of claim 1 , wherein the at least one metric of quality comprises a channel quality indicator (CQI).

5. The method of claim 4 , wherein the CQI is associated with at least one of a modulation format, a data rate, a number of codes used, or a transport block size for the HS-PDSCH.

6. The method of claim 1 , wherein the at least one metric of quality of the downlink comprises an acknowledgment or non-acknowledgment of a determination of integrity of a data packet transmitted from the source cell over the downlink.

7. The method of claim 6 , wherein the determination of integrity comprises a checksum or a cyclic redundancy check.

8. The method of claim 1 , wherein the at least one metric of quality comprises a hybrid automatic repeat request acknowledgment and/or non-acknowledgment (HARQ ACK/NACK).

9. The method of claim 1 , further comprising receiving information over the downlink from the source cell, the information being transmitted utilizing a modulation format or a transport block size based on the at least one metric of quality.

10. The method of claim 1 , further comprising switching the downlink from the source cell to the target cell.

11. A computer program product, comprising:

a non-transitory computer-readable medium comprising:

code for switching an uplink from a source cell to a target cell while maintaining a downlink with the source cell, wherein the uplink on the source cell is no longer being actively utilized after the switching; and

code for transmitting directly over the uplink to the target cell at least one metric of quality of the downlink.

12. The computer program product of claim 11 , wherein the uplink comprises a high speed shared information channel (HS-SICH) between a user equipment (UE) and a respective cell, and the downlink comprises a high speed physical downlink shared channel (HS-PDSCH) and a high speed shared control channel (HS-SCCH).

13. The computer program product of claim 11 , wherein the at least one metric of quality of the downlink corresponds to a signal power or an amount of signal interference of the downlink from the source cell.

14. The computer program product of claim 11 , wherein the at least one metric of quality comprises a channel quality indicator (CQI).

15. The computer program product of claim 14 , wherein the CQI is associated with at least one of a modulation format, a data rate, a number of codes used, or a transport block size for the HS-PDSCH.

16. The computer program product of claim 11 , wherein the at least one metric of quality of the downlink comprises an acknowledgment or non-acknowledgment of a determination of integrity of a data packet transmitted from the source cell over the downlink.

17. The computer program product of claim 16 , wherein the determination of integrity comprises a checksum or a cyclic redundancy check.

18. The computer program product of claim 11 , wherein the at least one metric of quality comprises a hybrid automatic repeat request acknowledgment and/or non-acknowledgment (HARQ ACK/NACK).

19. The computer program product of claim 11 , further comprising code for receiving information over the downlink from the source cell, the information being transmitted utilizing a modulation format or a transport block size based on the at least one metric of quality.

20. The computer program product of claim 11 , further comprising code for switching the downlink from the source cell to the target cell.

21. An apparatus operable in a wireless communication system, the apparatus comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to:

switch an uplink from a source cell to a target cell while maintaining a downlink with the source cell, wherein the uplink on the source cell is no longer being actively utilized after the switching; and

transmit directly over the uplink to the target cell at least one metric of quality of the downlink.

22. The apparatus of claim 21 , wherein the uplink comprises a high speed shared information channel (HS-SICH) between a user equipment (UE) and a respective cell, and the downlink comprises a high speed physical downlink shared channel (HS-PDSCH) and a high speed shared control channel (HS-SCCH).

23. The apparatus of claim 21 , wherein the at least one metric of quality of the downlink corresponds to a signal power or an amount of signal interference of the downlink from the source cell.

24. The apparatus of claim 21 , wherein the at least one metric of quality comprises a channel quality indicator (CQI).

25. The apparatus of claim 24 , wherein the CQI is associated with at least one of a modulation format, a data rate, a number of codes used, or a transport block size for the HS-PDSCH.

26. The apparatus of claim 21 , wherein the at least one metric of quality of the downlink comprises an acknowledgment or non-acknowledgment of a determination of integrity of a data packet transmitted from the source cell over the downlink.

27. The apparatus of claim 26 , wherein the determination of integrity comprises a checksum or a cyclic redundancy check.

28. The apparatus of claim 21 , wherein the at least one metric of quality comprises a hybrid automatic repeat request acknowledgment and/or non-acknowledgment (HARQ ACK/NACK).

29. The apparatus of claim 21 , wherein the at least one processor is further configured to receive information over the downlink from the source cell, the information being transmitted utilizing a modulation format or a transport block size based on the at least one metric of quality.

30. The apparatus of claim 21 , wherein the at least one processor is further configured to switch the downlink from the source cell to the target cell.

31. An apparatus for wireless communication, comprising:

means for switching an uplink from a source cell to a target cell while maintaining a downlink with the source cell, wherein the uplink on the source cell is no longer being actively utilized after the switching; and

means for transmitting directly over the uplink to the target cell at least one metric of quality of the downlink.

32. The apparatus of claim 31 , wherein the uplink comprises a high speed shared information channel (HS-SICH) between a user equipment (UE) and a respective cell, and the downlink comprises a high speed physical downlink shared channel (HS-PDSCH) and a high speed shared control channel (HS-SCCH).

33. The apparatus of claim 31 , wherein the at least one metric of quality of the downlink corresponds to a signal power or an amount of signal interference of the downlink from the source cell.

34. The apparatus of claim 31 , wherein the at least one metric of quality comprises a channel quality indicator (CQI).

35. The apparatus of claim 34 , wherein the CQI is associated with at least one of a modulation format, a data rate, a number of codes used, or a transport block size for the HS-PDSCH.

36. The apparatus of claim 31 , wherein the at least one metric of quality of the downlink comprises an acknowledgment or non-acknowledgment of a determination of integrity of a data packet transmitted from the source cell over the downlink.

37. The apparatus of claim 36 , wherein the determination of integrity comprises a checksum or a cyclic redundancy check.

38. The apparatus of claim 31 , wherein the at least one metric of quality comprises a hybrid automatic repeat request acknowledgment and/or non-acknowledgment (HARQ ACK/NACK).

39. The apparatus of claim 31 , further comprising means for receiving information over the downlink from the source cell, the information being transmitted utilizing a modulation format or a transport block size based on the at least one metric of quality.

40. The apparatus of claim 31 , further comprising means for switching the downlink from the source cell to the target cell.

41. A method of wireless communication, comprising:

switching an uplink from a source cell to a target cell while maintaining a downlink at the source cell, wherein the uplink on the source cell is no longer being actively utilized after the switching;

receiving directly over the uplink, at the target cell, at least one metric of quality of the downlink; and

communicating from the target cell to the source cell the at least one metric of quality of the downlink.

42. The method of claim 41 , further comprising determining a modulation format or a transport block size for the downlink from the source cell based on the at least one metric of quality of the downlink.

43. The method of claim 41 , wherein the communicating from the target cell to the source cell the at least one metric of quality of the downlink comprises:

sending the at least one metric of quality of the downlink from the target cell to a radio network controller communicatively coupled to the source cell and the target cell; and

receiving at the source cell, from the radio network controller, the at least one metric of quality of the downlink.

44. The method of claim 41 , further comprising:

switching the downlink from the source cell to the target cell; and

ceasing the communicating of the at least one metric of quality of the downlink from the target cell to the source cell.