Selection of resource scheduling mode in an OFDMA base station
View Patent ↗A base station schedules OFDMA resource blocks for M2M communication devices. The base station exchanges wireless communications with wireless user equipment. From the wireless user equipment, the base station receives transmission error data characterizing the wireless communications transferred from the wireless user equipment. Based on the wireless transmission error data, the base station selects an orthogonal mode or a shared mode for M2M communications. If orthogonal mode is selected, the base station schedules contiguous resource blocks for the M2M devices, so the resource blocks use contiguous frequencies and contiguous timeslots that are not shared with the wireless user equipment. If shared mode is selected, the base station schedules non-contiguous resource blocks for the M2M devices, so the non-contiguous resource blocks use non-contiguous frequencies and non-contiguous timeslots that are shared with the wireless user equipment. The base station receives M2M communications transferred by the M2M devices based on the selected schedule.
1. A method of operating a base station system to schedule Orthogonal Frequency Division Multiple Access (OFDMA) resource blocks for a set of Machine-to-Machine (M2M) communication devices:
in an OFDMA base station, exchanging wireless communications from wireless User Equipment;
in the OFDMA base station, receiving wireless transmission error data from the wireless User Equipment that characterizes the wireless communications transferred from the wireless User Equipment wherein the wireless transmission error data comprises at least one of a block error rate, a frame error rate, and an IP packet loss rate;
in a base station control system, selecting one of an orthogonal mode and a shared mode for M2M communications based on the wireless transmission error data;
if the orthogonal mode is selected, scheduling a plurality of contiguous OFDMA resource blocks for the set of M2M devices, wherein the contiguous OFDMA resource blocks use multiple contiguous OFDMA frequencies and use multiple contiguous OFDMA time slots that are not shared with the wireless User Equipment;
if the shared mode is selected, scheduling a plurality of non-contiguous OFDMA resource blocks for the set of M2M devices, wherein the non-contiguous OFDMA resource blocks use multiple non-contiguous OFDMA frequencies and use multiple non-contiguous OFDMA time slots that are shared with the wireless User Equipment; and
in the OFDMA base station, receiving M2M communications transferred by the set of M2M devices based on the selected schedule.
2. The method of claim 1 wherein the wireless transmission error data further comprises a forward error correction rate.
3. The method of claim 1 wherein the wireless transmission error data further comprises a HARQ retry rate.
4. The method of claim 1 wherein the wireless transmission error data further comprises a random access preamble retry count.
5. The method of claim 1 wherein the wireless transmission error data further comprises a mean opinion score.
6. The method of claim 1 wherein receiving wireless transmission error data comprises receiving from a UE a periodic CQI report over the PUCCH or an aperiodic CQI report over the PUSCH.
7. The method of claim 1 wherein the multiple contiguous OFDMA frequencies are contiguous with a guard frequency of the channel bandwidth.
8. The method of claim 1 wherein the multiple contiguous OFDMA frequencies are contiguous with the DC subcarrier frequency within the channel bandwidth.
9. The method of claim 1 wherein the multiple contiguous OFDMA frequencies includes the most faded frequency within the channel bandwidth.
10. A base station system to schedule Orthogonal Frequency Division Multiplexing (OFDMA) resource blocks for a set of Machine-to-Machine (M2M) communication devices:
an OFDMA communication interface configured to exchange wireless communications with wireless User Equipment and receive wireless transmission error data from the wireless User Equipment that characterizes the wireless communications transferred from the wireless User Equipment for receipt by the OFDMA base station wherein the wireless transmission error data comprises at least one of a block error rate, a frame error rate, and an IP packet loss rate;
a base station control system configured to select one of an orthogonal mode and a shared mode for M2M communications based on the wireless transmission error data, and if the orthogonal mode is selected, to schedule a plurality of contiguous OFDMA resource blocks for the set of M2M devices, wherein the contiguous OFDMA resource blocks use multiple contiguous OFDMA frequencies and use multiple contiguous OFDMA time slots that are not shared with the wireless User Equipment, and if the shared mode is selected, to schedule a plurality of non-contiguous OFDMA resource blocks for the set of M2M devices, wherein the non-contiguous OFDMA resource blocks use multiple non-contiguous OFDMA frequencies and use multiple non-contiguous OFDMA time slots that are shared with the wireless User Equipment; and
the OFDMA communication interface configured to receive M2M communications transferred by the set of M2M devices based on the selected schedule.
11. The base station system of claim 10 wherein the wireless transmission error data further comprises a forward error correction rate.
12. The base station system of claim 10 wherein the wireless transmission error data further comprises a HARQ retry rate.
13. The base station system of claim 10 wherein the wireless transmission error data further comprises a random access preamble retry count.
14. The base station system of claim 10 wherein the wireless transmission error data further comprises a mean opinion score.
15. The base station system of claim 10 wherein the OFDMA communication interface configured to receive a UE a periodic CQI report over the PUCCH or an a periodic CQI report over the PUSCH.
16. The base station system of claim 10 wherein the multiple contiguous OFDMA frequencies are contiguous with a guard frequency of the channel bandwidth.
17. The base station system of claim 10 wherein the multiple contiguous OFDMA frequencies are contiguous with the DC subcarrier frequency within the channel bandwidth.
18. The base station system of claim 10 wherein the multiple contiguous OFDMA frequencies includes the most faded frequency within the channel bandwidth.