Updating scheduling request resources

• US 8,929,319 B2
• Filed: 12/19/2012
• Issued: 01/06/2015
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Anderson, Nicholas William, Harrison, Robert Mark, Novak, Robert, Vutukuri, Eswar
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): SOLINSKY, PETER G
• Application Number:
  US13/720,067
• Publication Number:
  US 20130163536A1
• Time in Patent Office: 748 Days
• Field of Search: 370/329, 455/450, 455/464, 455/509
• US Class Current: 370/329
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• 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 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

In some implementations, a method implemented in an eNodeB (eNB) base station for single carrier frequency division multiple access SC-FDMA within a wireless system includes assigning to a user equipment a plurality of uplink scheduling request resources each comprising a plurality of subcarriers. It is determined that change in scheduling request resource used by the UE should be made. Upon determining that a change in scheduling request resource should be made, a command is transmitted to the UE instructing the UE to transmit scheduling requests on another of the plurality of assigned scheduling request resources.

Claims

1. A method implemented in an eNodeB (eNB) for single carrier frequency division multiple access SC-FDMA within a wireless system comprising:

assigning to a user equipment (UE) a first type of uplink scheduling request resource comprising a plurality of subcarriers;

determining that a change in scheduling request resource type used by the UE should be made; and

upon determining that a change in scheduling request resource type should be made, transmitting a command to the UE instructing the UE to transmit scheduling requests on a second type of uplink scheduling request resource comprising a second plurality of subcarriers.

2. A method according to claim 1 wherein the first type of uplink scheduling request resources is a shared SC-FDMA resource assigned to a plurality of UEs of the wireless system.

3. A method according to claim 1 wherein the first type of uplink scheduling request resources is a dedicated SC-FDMA resource assigned only to the UE.

4. A method according to claim 1 wherein determining that a change of scheduling request resource type should be made comprises detecting a change in activity of the UE based on at least one of:

a current data activity status or a data activity level relating to the UE;

an activity relating to one or more applications resident on the UE;

an activity relating to services or logical channels associated with the UE;

a discontinuous reception timer, DRX state or sub-state;

a change in pattern relating to a DRX;

a determination of whether one or more timers controlling DRX behaviour are running or have expired;

a determination or measurement of pathloss between the eNB and the UE;

a determination or measurement of a downlink carrier to interference C/I or downlink carrier to interference-plus-noise C/N+I;

a determination or measurement of a uplink carrier to interference C/I or uplink carrier to interference-plus-noise C/N+I;

an uplink data rate for the UE;

an uplink modulation and coding scheme for the UE;

a ratio of a maximum device transmit power to a current UE transmission power.

5. A method according to claim 1 further comprising decoding a user ID from an uplink signal received on a shared uplink scheduling request resource assigned to a plurality of UEs of the wireless system, wherein a message allocating shared SC-FDMA uplink resources is transmitted to the UE associated with the decoded user ID.

6. A method according to claim 5 wherein the uplink signal is an uplink control channel signal.

7. A method according to claim 6 wherein the received uplink signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.

8. A method according to claim 6 wherein the step of decoding comprises using a block forward error correction FEC decoder.

9. A method according to claim 5 wherein the uplink signal is an uplink shared channel signal.

10. A method according to claim 9 wherein the received uplink control channel signal comprises a Physical Uplink Shared Channel PUSCH signal.

11. A method according to claim 9 wherein the step of decoding comprises using a turbo forward error correction FEC decoder.

12. A method according to claim 5 further comprising

despreading the uplink signal to form a first plurality of modulation symbol estimates;

and

utilising the first plurality of modulation symbol estimates to decode the user ID.

13. A method according to claim 1 wherein assigning the first type of scheduling request resources comprises transmitting a broadcast transmission or a common signalling message.

14. A method according to claim 1 wherein assigning the first type of scheduling request resources comprises transmitting a dedicated signalling message to the UE.

15. A method according to claim 5 wherein the user ID is related to a Cell Radio Network Temporary Identifier C-RNTI.

16. A method according to claim 1, wherein the first plurality of subcarriers is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.

17. A method according to claim 1, wherein the first plurality of subcarriers is within a PUSCH frequency region of an uplink system bandwidth of the wireless system.

18. A method according to claim 1, wherein SC-FDMA is used by the eNB for receiving uplink communication signals.

19. A method according to claim 1, wherein a modulation scheme other than SC-FDMA is used by the eNB for sending downlink communication signals.

22. The method of claim 1, wherein the command instructs the UE to use a preconfigured resource for the second type.

23. The method of claim 1, wherein the command includes a configuration of a resource to use for the second type.

20. An eNodeB (eNB) for single carrier frequency division multiple access SC-FDMA within a wireless system, comprising:

one or more processors configured to;

assign to a user equipment a first type of uplink scheduling request resource comprising a first plurality of subcarriers;

determine that a change in scheduling request resource type used by the UE should be made; and

upon the determination that a change in scheduling request resource type should be made, transmit a command to the UE instructing the UE to transmit scheduling requests on a second type of uplink scheduling request resource comprising a second plurality of subcarriers.

24. The eNodeB of claim 20, wherein the command instructs the UE to use a preconfigured resource for the second type.

25. The eNodeB of claim 20, wherein the command includes a configuration of a resource to use for the second type.

26. The eNodeB of claim 20, wherein the first plurality of subcarriers is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.

27. The eNodeB of claim 20, wherein the one or more processors configured to assign the first type of scheduling request resources comprises the one or more processors configured to transmit a broadcast transmission or a common signalling message.

28. The eNodeB of claim 20, wherein the one or more processors configured to assign the first type of scheduling request resources comprises the one or more processors configured to transmit a dedicated signalling message to a target the UE.

34. The eNodeB of claim 20, wherein the first type of uplink scheduling request resources is a shared SC-FDMA resource assigned to a plurality of UEs of the wireless system.

35. The eNodeB of claim 20, wherein the first type of uplink scheduling request resources is a dedicated SC-FDMA resource assigned only to the UE.

36. The eNodeB of claim 20, the one or more processors further configured decode a user ID from an uplink signal received on a shared uplink scheduling request resource assigned to a plurality of UEs of the wireless system, wherein a message allocating shared SC-FDMA uplink resources is transmitted to the UE associated with the decoded user ID.

21. A non-transitory computer-readable medium storing instructions to cause a processor to perform operations comprising:

assigning to a user equipment a first type of uplink scheduling request resource comprising a first plurality of subcarriers;

determining that a change in scheduling request resource type used by the UE should be made; and

upon determining that a change in scheduling request resource type should be made, transmitting a command to the UE instructing the UE to transmit scheduling requests on a second type of uplink scheduling request resource comprising a second plurality of subcarriers.

29. The computer-readable medium of claim 21, wherein the command instructs the UE to use a preconfigured resource for the second type.

30. The computer-readable medium of claim 21, wherein the command includes a configuration of a resource to use for the second type.

31. The computer-readable medium of claim 21, wherein the first plurality of subcarriers is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.

32. The computer-readable medium of claim 21, wherein the instructions comprising assigning the first type of scheduling request resources comprises the instructions comprising transmitting a broadcast transmission or a common signalling message.

33. The computer-readable medium of claim 21, wherein the instructions comprising assigning the first type of scheduling request resources comprises the instructions comprising transmitting a dedicated signalling message to a target the UE.

37. The computer-readable medium of claim 21, wherein the first type of uplink scheduling request resources is a shared SC-FDMA resource assigned to a plurality of UEs of the wireless system.

38. The computer-readable medium of claim 21, wherein the first type of uplink scheduling request resources is a dedicated SC-FDMA resource assigned only to the UE.

39. The computer-readable medium of claim 21, the instructions further comprising decoding a user ID from an uplink signal received on a shared uplink scheduling request resource assigned to a plurality of UEs of the wireless system, wherein a message allocating shared SC-FDMA uplink resources is transmitted to the UE associated with the decoded user ID.