Method implemented in a user equipment
View Patent ↗In some implementations, a method implemented in a user equipment UE for single carrier frequency division multiple access SC-FDMA within a wireless system includes receiving an assignment of a plurality of uplink scheduling request resources and comprising a plurality of SC-FDMA subcarriers of the wireless system. One of the plurality of uplink scheduling request resources is selected for transmission of scheduling requests. It is determined that a change in uplink scheduling request resource should be made. Upon determining that a change in scheduling request resource should be made, another of the assigned uplink scheduling request resources is selected for transmission of scheduling requests.
1. A method implemented in a user equipment UE for single carrier frequency division multiple access SC-FDMA within a wireless system comprising:
receiving, at the UE, an assignment of a first type of uplink scheduling request resource comprising a first plurality of subcarriers of the wireless system;
detecting, at the UE, a change in activity of the UE, wherein the change in activity is related to one or more applications resident on the UE;
determining, at the UE and in response to the detected change in activity, that a change in uplink scheduling request resource type should be made;
upon determining that a change in scheduling request resource type should be made, selecting, at the UE, a second type of uplink scheduling request resource comprising a second plurality of subcarriers for transmission of scheduling requests, wherein one of the first type or the second type is an unscheduled shared SC-FDMA resource assigned to a plurality of UEs of the wireless system and an other of the first type or the second type is a dedicated SC-FDMA resource assigned to only the UE, wherein the second plurality of subcarriers are located within a same system bandwidth as the first plurality of subcarriers; and
transmitting a signal comprising an encoded user ID on subcarriers used for the unscheduled shared SC-FDMA resource.
2. A method according to claim 1 wherein the detection of the change in activity of the UE is further based on one or more of:
a discontinuous reception timer, DRX state or sub-state;
a change in pattern relating to a DRX; or
a determination of whether one or more timers controlling DRX behaviour are running or have expired.
3. A method according to claim 1 wherein determining that a change of scheduling request resource type should be made comprises receiving an explicit signal from an eNB specifying which assigned scheduling request resource type to use.
4. A method according to claim 1 wherein the signal is an uplink control channel signal.
5. A method according to claim 4 wherein the signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.
6. A method according to claim 4 wherein the encoded user ID is generated using a block forward error correction FEC encoder.
7. A method according to claim 1 wherein the signal is an uplink shared channel signal.
8. A method according to claim 7 wherein the uplink signal comprises a Physical Uplink Shared Channel PUSCH signal.
9. A method according to claim 7 wherein the encoded user ID is generated using a turbo forward error correction FEC encoder.
10. A method according to claim 1 wherein the encoded user ID comprises encoded bits, and the method further comprises:
modulating the encoded bits to produce modulated symbols;
spreading the modulated symbols;
mapping each of the spread modulated symbols to the subcarriers used for the unscheduled shared SC-FDMA resource; and
transmitting a signal comprising the plurality of subcarriers in the wireless system.
11. A method according to claim 1 wherein said assignment of the first type of uplink scheduling request resource is received from a broadcast transmission or common signalling message transmitted by an eNB of the wireless system.
12. A method according to claim 1 wherein said assignment of the first type of uplink scheduling request resource is received from a dedicated transmission to the UE by an eNB of the wireless system.
13. A method according to claim 1 wherein the user ID is related to Cell Radio Network Temporary Identifier C-RNTI.
14. 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.
15. 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.
16. A method according to claim 1 , wherein SC-FDMA is used by the UE for sending uplink communication signals.
17. A method according to claim 1 , wherein a modulation scheme other than SC-FDMA is used for downlink communication signals received by the UE.
18. A user equipment UE for single carrier frequency division multiple access SC-FDMA within a wireless system, comprising:
one or more processors configured to:
receive an assignment of a first type of uplink scheduling request resource comprising a first plurality of subcarriers of the wireless system;
detect a chance in activity of the UE, wherein the chance in activity is related to one or more applications resident on the UE;
determine, in response to the detected chance in activity, that a change in uplink scheduling request resource type should be made;
upon determining that a change in scheduling request resource type should be made, select a second type of uplink scheduling request resource comprising a second plurality of subcarriers for transmission of scheduling requests, wherein one of the first type or the second type is an unscheduled shared SC-FDMA resource assigned to a plurality of UEs of the wireless system and an other of the first type or the second type is a dedicated SC-FDMA resource assigned to only the UE, wherein the second plurality of subcarriers are located within a same system bandwidth as the first plurality of subcarriers; and
transmit a signal comprising an encoded user ID on subcarriers used for the unscheduled shared SC-FDMA resource.
19. The UE of claim 18 , wherein the one or more processors configured to determine that a change of scheduling request resource type should be made comprises the one or more processors configured to receive an explicit signal from an eNB specifying which assigned scheduling request resource type to use.
20. The UE of claim 18 , wherein the signal is an uplink control channel signal.
21. The UE of claim 20 , wherein the signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.
22. The UE of claim 18 , wherein said assignment of the first type of uplink scheduling request resource is received from a broadcast transmission or common signalling message transmitted by an eNB of the wireless system.
23. The UE of claim 18 , wherein said assignment of the first type of uplink scheduling request resource is received from a dedicated transmission to the UE by an eNB of the wireless system.
24. The UE of claim 23 , wherein the user ID is related to Cell Radio Network Temporary Identifier C-RNTI.
25. The UE of claim 18 , wherein the first plurality of subcarriers is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.
26. The UE of claim 18 , wherein the first plurality of subcarriers is within a PUSCH frequency region of an uplink system bandwidth of the wireless system.
27. A non-transitory computer-readable medium storing instructions to cause a processor to perform operations comprising:
receiving, at a user equipment (UE), an assignment of a first type of uplink scheduling request resource comprising a first plurality of subcarriers of a wireless system;
detecting, at the UE, a change in activity of the UE, wherein the change in activity is related to one or more applications resident on the UE;
determining, at the UE and in response to the detected change in activity, that a change in uplink scheduling request resource type should be made;
upon determining that a change in scheduling request resource type should be made, selecting, at the UE, a second type of uplink scheduling request resource comprising a second plurality of subcarriers for transmission of scheduling requests, wherein one of the first type or the second type is an unscheduled shared SC-FDMA resource assigned to a plurality of UEs of the wireless system and an other of the first type or the second type is a dedicated SC-FDMA resource assigned to only the UE, wherein the second plurality of subcarriers are located within a same system bandwidth as the first plurality of subcarriers; and
transmitting a signal comprising an encoded user ID on subcarriers used for the unscheduled shared SC-FDMA resource.
28. The computer-readable medium of claim 27 , wherein determining that a change of scheduling request resource type should be made comprises the one or more processors configured to receive an explicit signal from an eNB specifying which assigned scheduling request resource type to use.
29. The computer-readable medium of claim 27 , wherein the signal is an uplink control channel signal.
30. The computer-readable medium of claim 29 , wherein the signal comprises a Physical Uplink Control Channel PUCCH format 2 or format 3 signal.
31. The computer-readable medium of claim 27 , wherein said assignment of the first type of uplink scheduling request resource is received from a broadcast transmission or common signalling message transmitted by an eNB of the wireless system.
32. The computer-readable medium of claim 27 , wherein said assignment of the first type of uplink scheduling request resource is received from a dedicated transmission to the UE by an eNB of the wireless system.
33. The computer-readable medium of claim 27 , wherein the user ID is related to Cell Radio Network Temporary Identifier C-RNTI.
34. The computer-readable medium of claim 27 , wherein the first plurality of subcarriers is within a PUCCH frequency region of an uplink system bandwidth of the wireless system.
35. The computer-readable medium of claim 27 , wherein the first plurality of subcarriers is within a PUSCH frequency region of an uplink system bandwidth of the wireless system.