Updating scheduling request resources
View Patent ↗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.
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.
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.
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.
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.
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.
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.
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.
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.