Method and apparatus for frequency selective scheduling in OFDMA based WLANs
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsSoma Tayamon, Hassan Halabian
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Abstract
A network node for an orthogonal Frequency Division Multiplexing Access, OFDMA, based wireless local area network is provided. The network node includes processing circuitry. The processing circuitry includes a processor and a memory. The memory contains instructions that, when executed by the processor, configure the processor to reduce transmission time inequality among each of a plurality of wireless device during an OFDMA subframe by assigning a respective OFDMA subband of a plurality of OFDMA subbands to each of the plurality of wireless devices, and cause data transmission on the assigned OFDMA subbands to the plurality of wireless device.
Claims24
A network node for an Orthogonal Frequency Division Multiplexing Access (OFDMA) based wireless local area network, the network node comprising:
- processing circuitry, the processing circuitry including a processor and a memory, the memory containing instructions that, when executed by the processor, configure the processor to:
- reduce transmission time inequality among each of a plurality of wireless devices during an OFDMA subframe by assigning a respective OFDMA subband of a plurality of OFDMA subbands to each of the plurality of wireless devices based on a smallest maximum transmission length among the assigned OFDMA subbands;
- and
- cause data transmission on the assigned OFDMA subbands to the plurality of wireless devices;
- wherein the reducing of the transmission time inequality among each of the plurality of wireless devices during the OFDMA subframe by assigning of the respective OFDMA subband of the plurality of OFDMA subbands to each of the plurality of wireless devices comprises:
- calculating maximum transmission times of all possible permutations of OFDMA subband allocations;
- determining an OFDMA subband allocation having the smallest maximum transmission length;
- and
- allocating OFDMA subbands of the plurality of OFDMA subbands based on the OFDMA subband allocation determined to have the smallest maximum transmission length.
A method of operation of a network node for an Orthogonal Frequency Division Multiplexing Access (OFDMA) based wireless local area network, the method comprising:
- reducing transmission time inequality among each of a plurality of wireless devices during an OFDMA subframe by assigning a respective OFDMA subband of a plurality of OFDMA subbands to each of the plurality of wireless devices based on a smallest maximum transmission length among the assigned OFDMA subbands;
- and causing data transmission on the assigned OFDMA subbands to the plurality of wireless devices;
- wherein the reducing of the transmission time inequality among each of the plurality of wireless device devices during the OFDMA subframe by assigning of the respective OFDMA subband of the plurality of OFDMA subbands to each of the plurality of wireless devices comprises:
- calculating maximum transmission times of all possible permutations of OFDMA subband allocations;
- determining an OFDMA subband allocation having the smallest maximum transmission length;
- and allocating OFDMA subbands of the plurality of OFDMA subbands based on the OFDMA subband allocation determined to have the smallest maximum transmission length.
A computer program product comprising a non-transitory computer readable medium storing a computer program comprising instructions which, when executed on at least one processor of a network node for an Orthogonal Frequency Division Multiplexing Access (OFDMA) based wireless local area network, cause the at least one processor to:
- reduce transmission time inequality among each of a plurality of wireless devices during an OFDMA subframe by assigning a respective OFDMA subband of a plurality of OFDMA subbands to each of the plurality of wireless devices based on a smallest maximum transmission length among the assigned OFDMA subbands;
- and cause data transmission on the assigned OFDMA subbands to the plurality of wireless devices;
- wherein the reducing of the transmission time inequality among each of the plurality of wireless device devices during the OFDMA subframe by assigning of the respective OFDMA subband of the plurality of OFDMA subbands to each of the plurality of wireless devices comprises:
- calculating maximum transmission times of all possible permutations of OFDMA subband allocations;
- determining an OFDMA subband allocation having the smallest maximum transmission length;
- and allocating OFDMA subbands of the plurality of OFDMA subbands based on the OFDMA subband allocation determined to have the smallest maximum transmission length.
Dependencies are inferred from the claim text.