Method implemented in a user equipment UE for use in a wireless system

• US 8,989,122 B2
• Filed: 12/19/2012
• Issued: 03/24/2015
• 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): KHAJURIA, SHRIPAL K
• Application Number:
  US13/719,635
• Publication Number:
  US 20130163534A1
• Time in Patent Office: 825 Days
• Field of Search: 370/329
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

In some implementations, a method implemented in a user equipment UE for use in a wireless system for single carrier frequency division multiple access SC-FDMA, the method including receiving an assignment of a scheduling request resource in the wireless system comprising a plurality of subcarriers. A user ID is encoded. An uplink control channel signal comprising the encoded user ID is transmitted on the plurality of subcarriers of the assigned scheduling request resource.

Claims

1. A method implemented in a user equipment UE for use in a wireless system for single carrier frequency division multiple access SC-FDMA, the method comprising:

receiving an assignment of a recurring scheduling request resource in the wireless system comprising a plurality of subcarriers, wherein the recurring scheduling request resource is assigned to a plurality of UEs;

encoding a user ID; and

transmitting an SC-FDMA uplink control channel signal comprising the encoded user ID on the plurality of subcarriers of the assigned scheduling request resource.

2. A method according to claim 1 further comprising:

determining a need to transmit on scheduled uplink resources in the SC-FDMA wireless system; and

wherein said transmitting is performed upon determining the need to transmit on scheduled uplink resources.

3. A method according to claim 1 wherein encoding the user ID comprises generating encoded bits and the method further comprises:

modulating the encoded bits to produce modulated symbols;

spreading the modulated symbols; and

mapping each of the spread modulated symbols to the plurality of subcarriers.

4. A method according to claim 1 wherein the assignment is received from a broadcast transmission or common signalling message transmitted by an eNB of the wireless system.

5. A method according to claim 1 wherein said assignment is received from a dedicated transmission to the UE by an eNB of the wireless system.

6. A method according to claim 1 wherein the user ID is related to a Cell Radio Network Temporary Identifier C-RNTI.

7. A method according to claim 1 wherein the step of encoding comprises using a block forward error correction FEC encoder.

8. A method according to claim 1 wherein the SC-FDMA uplink control channel signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.

9. A method according to claim 8 further comprising selecting a constituent resource from the plurality of constituent resources and transmitting the SC-FDMA uplink control channel signal on the selected constituent resource.

10. A method according to claim 9 wherein encoding the user ID comprises encoding a first portion of the user ID and wherein selecting the constituent resource from within the plurality of constituent resources is based upon a second portion of the user ID.

11. A method according to claim 1 wherein the scheduling request resource comprises a plurality of constituent scheduling request resources.

12. A method according to claim 11 wherein transmitting the SC-FDMA uplink control channel signal comprising the encoded user ID comprises making a plurality of transmissions on the plurality of the constituent resources.

13. A method according to claim 1 wherein the user ID is encoded using a non-user-specific bit scrambling sequence associated with the shared assigned scheduling request resource.

14. A method according to claim 13 wherein information related to construct the non-user-specific bit scrambling sequence is received from an eNB of the wireless system.

15. A method according to claim 1 wherein the assigned SC-FDMA scheduling request resource is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.

16. A method according to claim 1 wherein the assigned SC-FDMA scheduling request resource is within a PUSCH frequency region of an uplink system bandwidth of the wireless system.

17. A method according to claim 1 further comprising calculating and appending a cyclic redundancy check code CRC to the transmission.

18. A method according to claim 17 further wherein the CRC is calculated and appended to the user ID prior to encoding the user ID.

19. A method according to claim 1 wherein said UE comprises a plurality of antennas and has a plurality of associated user IDs, the method further comprising:

associating an antenna with one of the user IDs;

wherein encoding the user ID comprises encoding the user ID associated with the antenna; and

transmitting the encoded user ID is performed using at least the antenna associated with the user ID.

20. A method according to claim 19 further comprising selecting an antenna for transmission, wherein the UE determines the selected antenna for transmission by measuring signals transmitted from an access node on the plurality of antennas.

21. A method according to claim 19 further comprising selecting an antenna for transmission in response to receiving an instruction from an access node as to which of the plurality of antennas to select.

22. A method according to claim 21 comprising associating each of the plurality of user IDs with a particular antenna such that a receiving access node can measure a received power from a transmission of the user ID by the UE and associate it with the UE'"'"'s antenna using the received user ID.

23. A method according to claim 22 wherein the transmitted signal comprises reference signals associated with each antenna such that the eNB can measure a received power from each of the UE'"'"'s antennas and use the measured power to generate the instruction for transmission to the UE.

24. A method according to claim 1 wherein said UE comprises multiple antennas each associated with a particular user ID, the method further comprising encoding each of the plurality of user IDs and transmitting the encoded user IDs from their respective associated antennas simultaneously on the assigned scheduling request resource.

25. A method according to claim 1 wherein a plurality of antennas are associated with one user ID.

26. A method according to claim 25 further comprising transmitting a plurality of distinct reference signals, wherein each of the distinct reference signals is transmitted on one of the plurality of antennas associated with the one user ID.

27. A method according to claim 1 wherein said assigned resource is associated with a first scheduling request resource type, and said method further comprises:

receiving a further assigned resource associated with a second scheduling request resource type;

determining that a change from the first scheduling request resource type to the second scheduling request resource type is desirable; and

upon determining that a change in scheduling request resource type is desirable, transmitting scheduling requests on the further assigned resource associated with the second scheduling request resource type.

28. A method according to claim 27 wherein at least one of the assigned scheduling request resources is a shared resource assigned to a plurality of UEs of the wireless system and at least one of the assigned scheduling request resources is a dedicated resource assigned only to the UE.

29. A method according to claim 27 wherein determining that a change of scheduling request resource is desirable comprises detecting a change in activity of the UE based on one or more 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 maximum UE transmit power to a current UE transmit power.

30. A method according to claim 29 wherein determining that a change of scheduling request resource is desirable comprises receiving an explicit signal from an eNB specifying which assigned scheduling request resource to use.

31. A method according to claim 1 wherein SC-FDMA is used by the UE for uplink communication signals sent by the UE.

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

33. A user equipment UE for a single carrier frequency division multiple access SC-FDMA system, comprising:

one or more processors configured to;

receive an assignment of a recurring scheduling request resource in the wireless system comprising a plurality of subcarriers, wherein the recurring scheduling request resource is assigned to a plurality of UEs;

encode a user ID; and

transmit an SC-FDMA uplink control channel signal comprising the encoded user ID on the plurality of subcarriers of the assigned scheduling request resource.

34. The UE of claim 33, wherein the assignment is received from a broadcast transmission or common signalling message transmitted by an eNB of the wireless system.

35. The UE of claim 33, wherein the assignment is received from a dedicated transmission to the UE by an eNB of the wireless system.

36. The UE of claim 33, wherein the user ID is related to a Cell Radio Network Temporary Identifier C-RNTI.

37. The UE of claim 33, wherein the SC-FDMA uplink control channel signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.

38. The UE of claim 33, wherein the user ID is encoded with a non-user-specific bit scrambling sequence.

39. The UE of claim 33, wherein the scheduling request resource comprises a plurality of constituent scheduling request resources, and wherein the one or more processors are further configured to:

select a constituent resource from the plurality of constituent resources; and

transmit the SC-FDMA uplink control channel signal on the selected constituent resource.

40. The UE of claim 33, wherein the assigned scheduling request resource is within a PUCCH frequency region or a PUSCH frequency region of an uplink system bandwidth of the wireless system.

41. The UE of claim 33, wherein the one or more processors are further configured to calculate and append a cyclic redundancy check code CRC to the transmission.

42. The UE of claim 33, wherein said UE comprises a plurality of antennas and has a plurality of associated user IDs, and wherein the one or more processors are further configured to:

associate an antenna with one of the user IDs;

encode the user ID associated with the antenna; and

use at least the antenna associated with the user ID to transmit the encoded user ID.

43. The UE of claim 42, wherein the one or more processors are further configured to select an antenna for transmission by measuring signals transmitted from an access node on the plurality of antennas.

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

receiving an assignment of a recurring scheduling request resource in the wireless system comprising a plurality of subcarriers, wherein the recurring scheduling request resource is assigned to a plurality of UEs;

encoding a user ID; and

transmitting an SC-FDMA uplink control channel signal comprising the encoded user ID on the plurality of subcarriers of the assigned scheduling request resource.

45. A method implemented in a user equipment UE for a wireless telecommunications system comprising:

receiving an assignment of a recurring scheduling request resource comprising a plurality of subcarriers, wherein the recurring scheduling request resource is assigned to a plurality of UEs;

determining a need to transmit on scheduled uplink resources;

encoding a user ID to generate encoded bits;

modulating the encoded bits to produce modulated symbols;

spreading the modulated symbols;

mapping each of the spread modulated symbols to the plurality of subcarriers; and

upon determining a need to transmit on scheduled uplink resources, transmitting an SC-FDMA uplink control channel signal comprising the plurality of subcarriers of the assigned scheduling request resource.