Systems and methods for allocating resource blocks based on uplink transmission parameters
Systems and methods are described for allocating resource blocks based on uplink transmission parameters, resulting in beneficial coverage and capacity of a wireless system. A headroom report that comprises a transmission power headroom for a wireless device may be received. Potential resource block allocations for the wireless device may be generated based on channel information for a plurality of frequency bands, the generated potential resource block allocations comprising a frequency band and a time slot. A potential resource block allocation may be selected from among the potential resource block allocations based on a maximum power reduction for the allocation and the reported transmission power headroom for the wireless device. The selected resource blocks may then be allocated for the wireless device.
1. A method for allocating resource blocks based on uplink transmission parameters, the method comprising:
receiving, from a wireless device in communication with an access node, a headroom report comprising a transmission power headroom for the wireless device;
generating potential resource block allocations for the wireless device based on channel information for a plurality of frequency bands, resource blocks of the potential resource block allocations comprising a frequency band and time;
ranking the potential resource block allocations based on maximum power reductions for the potential resource block allocations;
selecting, from among the potential resource block allocations, a resource block allocation having a highest ranking, wherein a maximum power reduction for the selected resource block allocation and the transmission power headroom for the wireless device meet a criteria; and
allocating resource blocks included in the selected resource block allocation to the wireless device,
wherein the selected resource block allocation meets the criteria when the transmission power headroom for the wireless device minus the maximum power reduction for the selected resource block allocation is greater than a threshold.
2. The method of claim 1 , further comprising transmitting data from the wireless device to the access node using the allocated resource blocks.
3. The method of claim 1 , wherein the maximum power reduction for the selected resource block allocation is determined based on frequency bands for the resource blocks included in the selected resource block allocation and timings for the resource blocks included in the selected allocation.
4. The method of claim 1 , further comprising:
retrieving one or more application requirements for the wireless device; and
wherein the maximum power reduction for the selected resource block allocation and the transmission power headroom for the wireless device meet the criteria when the selected resource block allocation satisfies the one or more application requirements.
5. The method of claim 1 , further comprising:
estimating frequency selective scheduling gains based on the channel information.
6. The method of claim 5 , wherein the selected resource block allocation meets the criteria when the transmission power headroom for the wireless device plus the estimated frequency selective scheduling gain for the selected resource block allocation minus the maximum power reduction for the selected resource block allocation is greater than another threshold.
7. The method of claim 1 , wherein the channel information for the plurality of frequency bands is based on one or more of a received channel quality indicator report from the wireless device and a sounding reference signal from the wireless device.
8. A system for allocating resource blocks based on uplink transmission parameters, the system comprising:
an access node comprising a scheduler and a processor configured to:
receive, from a wireless device in communication with the access node, a headroom report comprising a transmission power headroom for the wireless device;
generate potential resource block allocations for the wireless device based on channel information for a plurality of frequency bands, resource blocks of the potential resource block allocations comprising a frequency band and time;
rank the potential resource block allocations based on estimated frequency selective scheduling gains for the potential resource block allocations, the frequency selective scheduling gains being estimated based on the channel information;
select, from among the potential resource block allocations, a resource block allocation having a highest ranking, wherein an estimated frequency selective scheduling gain for the selected resource block allocation, a maximum power reduction for the selected resource block allocation, and the transmission power headroom for the wireless device meet a criteria for the selected resource block allocation; and
allocate resource blocks included in the selected resource block allocation to the wireless device.
9. The system of claim 8 , wherein the access node is further configured to receive data from the wireless device using the allocated resource blocks.
10. The system of claim 8 , wherein the access node is further configured to:
determine maximum power reductions for the potential resource block allocations.
11. The system of claim 10 , wherein the selected resource block allocation meets the criteria when the transmission power headroom for the wireless device minus the maximum power reduction for the selected resource block allocation is greater than a threshold.
12. The system of claim 11 , wherein the maximum power reduction for the selected resource block allocation is determined based on frequency bands for resource blocks included in the selected resource block allocation and timings for the resource blocks included in the selected resource block allocation.
13. The system of claim 11 , wherein the access node is further configured to:
retrieve one or more application requirements for the wireless device; and
wherein the maximum power reduction for the selected resource block allocation and the transmission power headroom for the wireless device meet the criteria when the selected resource block allocation satisfies the one or more application requirements.
14. The system of claim 8 , wherein the selected resource block allocation meets the criteria when the transmission power headroom for the wireless device plus the estimated frequency selective scheduling gain for the selected resource block allocation minus the maximum power reduction for the selected resource block allocation is greater than a threshold.
15. The system of claim 8 , wherein the channel information for the plurality of frequency bands is based on one or more of a received channel quality indicator report from the wireless device and a sounding reference signal from the wireless device.
16. A method for allocating resource blocks based on uplink transmission parameters, the method comprising:
receiving, from a wireless device in communication with an access node, a headroom report that comprises a transmission power headroom for the wireless device;
generating potential resource block allocations for the wireless device based on channel information for a plurality of frequency bands, wherein resource blocks of the potential resource block allocations comprise a frequency band and time slot;
determining frequency selective scheduling gains for regions of the potential resource block allocations, a region comprising a block of resource blocks within a range of frequencies and a range of time slots;
ranking the regions according to values of the frequency selective scheduling gains;
calculating an adjusted headroom metric based on the transmission power headroom included in the headroom report received from the wireless device;
ranking, within at least one region of the ranked regions, the potential resource block allocations of the at least one region according to the adjusted headroom metric, a frequency selective scheduling gain for the at least one region of the ranked regions, and a maximum power reduction associated with the potential resource block allocations;
iteratively selecting, from among the regions, resource block allocations according to the rankings, the selected resource block allocations meeting a power headroom criteria for the wireless device; and
allocating resource blocks included in the selected resource block allocations to the wireless device.
17. The method of claim 16 , wherein the channel information for the plurality of frequency bands is based on one or more of a received channel quality indicator report from the wireless device and a sounding reference signal from the wireless device.