Method and apparatus for facilitating effective scheduling grants

• US 8,891,436 B2
• Filed: 10/12/2010
• Issued: 11/18/2014
• Est. Priority Date: 05/21/2010
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Jianqiang, Fan, Mingxi, Guo, Jiming, Chen, Bo
• Primary Examiner(s): Pham, Brenda H
• Application Number:
  US13/641,045
• Publication Number:
  US 20130223411A1
• Time in Patent Office: 1,498 Days
• Field of Search: 370/310.2, 370/320, 370/321, 370/235, 370/231, 370/232, 370/328, 370/329, 370/335, 370/337, 370/342, 370/341, 370/347, 370/349
• US Class Current: 370/320
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 7/216 Code division or spread-spectrum multiple access [CDMA, SSMA]
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A method and apparatus for effectively facilitating grant scheduling is provided. The method may comprise transmitting, by a user equipment (UE), a grant request, wherein the grant request includes a UE power headroom (UPH) value, and receiving, from a Node B, a scheduling grant, wherein the scheduling grant is derived from the transmitted UPH.

Claims

1. A method of wireless communication in a time division synchronous code division multiple access (TD-SCDMA) system, comprising:

transmitting, by a user equipment (UE), a grant request, wherein the grant request includes a UE power headroom (UPH) value; and

receiving, from a Node B, a scheduling grant including a code rate, wherein the scheduling grant is derived from the transmitted UPH.

2. The method of claim 1, wherein the scheduling grant is derived by the Node B from the UPH by generating a signal-to-noise (SNR) headroom value from the UPH, and determining the code rate from the SNR headroom value using a look up table.

3. The method of claim 1, wherein the SNR headroom value is determined using a first equation for scheduled communications, and a second equation for non-scheduled communications.

4. The method of claim 1, wherein the transmitting further comprises transmitting the grant request using a random access channel.

5. The method of claim 1, wherein the transmitting further comprises transmitting the grant request using a physical uplink channel.

6. The method of claim 1, wherein the receiving further comprises receiving the scheduling grant using an enhanced-absolute grant channel (E-AGCH).

7. The method of claim 1, wherein the grant request is a non-scheduled request, and wherein the receiving further comprises receiving the scheduling grant using an enhanced-uplink control channel (E-UCCH).

8. The method of claim 1, further comprising:

incrementing an enhanced physical uplink channel (E-PUCH) power up upon receiving a NACK from the Node B.

9. An apparatus for wireless communication in a TD-SCDMA system, comprising:

means for transmitting, by a UE, a grant request, wherein the grant request includes a UPH value; and

means for receiving, from a Node B, a scheduling grant including a code rate, wherein the scheduling grant is derived from the transmitted UPH.

10. The apparatus of claim 9, wherein the scheduling grant is derived by the Node B from the UPH through means for generating a signal-to-noise (SNR) headroom value from the UPH, and means for determining the code rate from the SNR headroom value from a look up table.

11. The apparatus of claim 9, wherein the SNR headroom value is determined using a first equation for scheduled communications, and a second equation for non-scheduled communications.

12. The apparatus of claim 9, wherein the means for transmitting further comprise means for transmitting the grant request using a random access channel.

13. The apparatus of claim 9, wherein the means for transmitting further comprise means for transmitting the grant request using a physical uplink channel.

14. The apparatus of claim 9, wherein the means for receiving further comprise means for receiving the scheduling grant using an enhanced-absolute grant channel (E-AGCH).

15. The apparatus of claim 9, wherein the grant request is a non-scheduled request, and wherein the means for receiving further comprise means for receiving the scheduling grant using an enhanced-uplink control channel (E-UCCH).

16. The apparatus of claim 9, further comprising:

means for incrementing an enhanced physical uplink channel (E-PUCH) power up upon receiving a NACK from the Node B.

17. A computer program product, comprising:

a non-transitory computer-readable medium comprising code for;

transmitting, by a UE, a grant request, wherein the grant request includes a UPH value; and

receiving, from a Node B, a scheduling grant including a code rate, wherein the scheduling grant is derived from the transmitted UPH.

18. The computer program product of claim 17, wherein the scheduling grant is derived by the Node B from the UPH by generating a signal-to-noise (SNR) headroom value from the UPH, and determining the code rate from the SNR headroom value using a look up table.

19. The computer program product of claim 17, wherein the SNR headroom value is determined using a first equation for scheduled communications, and a second equation for non-scheduled communications.

20. The computer program product of claim 17, wherein the non-transitory computer-readable medium further comprises code for:

transmitting the grant request using a random access channel.

21. The computer program product of claim 17, wherein the non-transitory computer-readable medium further comprises code for:

transmitting the grant request using a physical uplink channel.

22. The computer program product of claim 17, wherein the non-transitory computer-readable medium further comprises code for:

receiving the scheduling grant using an enhanced-absolute grant channel (E-AGCH).

23. The computer program product of claim 17, wherein the grant request is a non-scheduled request, and wherein the non-transitory computer-readable medium further comprises code for:

receiving the scheduling grant using an enhanced-uplink control channel (E-UCCH).

24. The computer program product of claim 17 wherein the non-transitory computer-readable medium further comprises code for:

incrementing an enhanced physical uplink channel (E-PUCH) power up upon receiving a NACK from the Node B.

25. An apparatus for wireless communication in a TD-SCDMA system, comprising:

at least one processor;

a memory coupled to the at least one processor;

a transmitter configured to transmit a grant request, wherein the grant request includes a UPH value; and

a receiver configured to receive, from a Node B, a scheduling grant including a code rate, wherein the scheduling grant is derived from the transmitted UPH.

26. The apparatus of claim 25, wherein the scheduling grant is derived by the Node B from the UPH by generating a signal-to-noise (SNR) headroom value from the UPH, and determining the code rate from the SNR headroom value using a look up table.

27. The apparatus of claim 25, wherein the SNR headroom value is determined using a first equation for scheduled communications, and a second equation for non-scheduled communications.

28. The apparatus of claim 25, wherein the transmitter is further configured to:

transmit the grant request using a random access channel.

29. The apparatus of claim 25, wherein the transmitter is further configured to:

transmit the grant request using a physical uplink channel.

30. The apparatus of claim 25, wherein the receiver is further configured to:

receive the scheduling grant using an enhanced-absolute grant channel (E-AGCH).

31. The apparatus of claim 25, wherein the grant request is a non-scheduled request, wherein the receiver is further configured to:

receive the scheduling grant using an enhanced-uplink control channel (E-UCCH).

32. The apparatus of claim 25, wherein the at least one processor is configured to:

increment an enhanced physical uplink channel (E-PUCH) power up upon receiving a NACK from the Node B.