Channel width, spatial streams, and short packet signaling
Methods, apparatuses, and computer readable media include an apparatus of an access point (AP) or station (STA) comprising processing circuitry configured to decode a legacy preamble of a physical layer (PHY) protocol data unit (PPDU), determine whether the legacy preamble comprises an indication that the PPDU is an extremely-high throughput (EHT) PPDU, and in response to the determination indicating the PPDU is the EHT PPDU, decode the EHT PPDU. Some embodiments determine a spatial stream resource allocation based on a row of a spatial configuration table, a row of a frequency resource unit table, a number of stations, and location of the station relative to the number of stations in user fields of an EHT-signal (SIG) field. To accommodate 16 spatial streams, some embodiments extend the length of the packet extension field, extend signaling of a number of spatial streams, and/or extend a number of EHT-SIG symbols.
1. An apparatus of an extremely high throughput (EHT) station (STA), the apparatus comprising memory; and processing circuitry coupled to the memory, theprocessing circuity configured to:
decode an EHT multi-user (MU) physical layer (PHY) protocol data unit (PPDU), the EHT MU PPDU comprising a universal signal (U-SIG) field, the U-SIG field comprising a number of EHT signal (EHT-SIG) symbols field, the number of EHT-SIG symbols field indicating a number of symbols of an EHT-SIG field, the EHT-SIG field comprising a common field, the common field indicating a resource unit (RU) allocation subfield, the RU allocation subfield indicating an RU assignment, the RU assignment indicating a size of a RU and a placement of the RU in the frequency domain, the EHT-SIG further comprising a user field, the user field comprising a station identification (ID) subfield indicating an identification of the EHT STA and a spatial configuration subfield, the spatial configuration field indicating a number of spatial streams allocated to the EHT STA, wherein the EHT-SIG symbols field is 5 bits; and
decode a data portion of the EHT MU PPDU in accordance with the RU assignment and the number of spatial streams allocated to the EHT STA.
2. The apparatus of claim 1 wherein following the data portion is a packet extension portion of the EHT MU PPDU, the packet extension portion having a length of 20 μs.
3. The apparatus of claim 1 wherein the spatial configuration subfield is 6 bits.
4. The apparatus of claim 1 , wherein the U-SIG comprises a 3-bit bandwidth (BW) field, the bandwidth field indicating a bandwidth of 20 MHz, 40 MHz, 80 MHz, 160 MHz or 320 MHz.
5. The apparatus of claim 1 wherein the spatial configuration field indicates a row in a spatial configuration table and wherein the memory is configured to store the spatial configuration table.
6. The apparatus of claim 1 wherein the user field is one of a plurality of user fields, and wherein the processing circuitry is further configured to:
determine the RU assignment of a plurality of RU assignments allocated to the EHT STA based on a position of the user field within the plurality of user fields.
7. The apparatus of claim 1 wherein the number of spatial streams allocated to the EHT STA is 1 to 16.
8. The apparatus of claim 1 wherein the user field is one of a plurality of user fields, and wherein the number of symbols of the EHT-SIG field is based on a number of the plurality of user fields.
9. The apparatus of claim 1 wherein following the data portion is a packet extension portion of the EHT MU PPDU having a length based on an estimated processing time needed to decode the EHT MU PPDU.
10. The apparatus of claim 9 wherein the packet extension portion is 0 μs to 20 μs.
11. The apparatus of claim 1 , wherein before the U-SIG field the EHT MU PPDU comprises a legacy signal field (L-SIG) and a repeat (L-SIG)(RL-SIG), and wherein the processing circuitry is further configured to:
determine the EHT MU PPDU comprises the U-SIG field based on the RL-SIG and the L-SIG.
12. The apparatus of claim 1 wherein the RU allocation field indicates a table index value, the table index value indicating a row of an RU assignment table, the row of the RU assignment table comprising a plurality of RU assignments and a number of EHT STAs allocated to each RU assignment of the plurality of frequency RUs, wherein the processing circuitry is further configured to:
determine the RU assignment including the size of the RU and its placement in the frequency domain based the row of the RU assignment table and a placement of the user field within a plurality of user fields.
13. The apparatus of claim 1 further comprising: mixer circuitry to downconvert RF signals to baseband signals; and synthesizer circuitry, the synthesizer circuitry comprising one of a fractional-N synthesizer or a fractional N/N+1 synthesizer, the synthesizer circuitry configured to generate an output frequency for use by the mixer circuitry, wherein the processing circuitry is configured to decode the baseband signals, the baseband signals including the EHT MU PPDU.
14. The apparatus of claim 1 further comprising: mixer circuitry to down-convert RF signals to baseband signals; and synthesizer circuitry, the synthesizer circuitry comprising a delta-sigma synthesizer, the synthesizer circuitry configured to generate an output frequency for use by the mixer circuitry, wherein the processing circuitry is configured to decode the baseband signals, the baseband signals including the EHT MU PPDU.
15. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of an apparatus of an extremely high throughput (EHT) station (STA), the instructions to configure the one or more processors to:
decode an EHT multi-user (MU) physical layer (PHY) protocol data unit (PPDU), the EHT MU PPDU comprising a universal signal (U-SIG) field, the U-SIG field comprising a number of EHT signal (EHT-SIG) symbols field, the number of EHT-SIG symbols field indicating a number of symbols of an EHT-SIG field, the EHT-SIG field comprising a common field, the common field indicating a resource unit (RU) allocation subfield, the RU allocation subfield indicating an RU assignment, the RU assignment indicating a size of a RU and a placement of the RU in the frequency domain, the EHT-SIG further comprising a user field, the user field comprising a station identification (ID) field indicating an identification of the EHT STA and a spatial configuration field, the spatial configuration field indicating a number of spatial streams allocated to the EHT STA, wherein the EHT-SIG symbols field is 5 bits; and
decode a data portion of the EHT MU PPDU in accordance with the RU assignment and the number of spatial streams allocated to the EHT STA.
16. An apparatus of an extremely high throughput (EHT) access point (AP), the apparatus comprising memory; and processing circuitry coupled to the memory, the processing circuity configured to:
encode an EHT multi-user (MU) physical layer (PHY) protocol data unit (PPDU), the EHT MU PPDU comprising a universal signal (U-SIG) field, the U-SIG field comprising a number of EHT signal (EHT-SIG) symbols field, the number of EHT-SIG symbols field indicating a number of symbols of an EHT-SIG field, the EHT-SIG field comprising a common field, the common field indicating a resource unit (RU) allocation subfield, the RU allocation subfield indicating a plurality of RU assignments including sizes of the plurality of RU assignments and their placement in the frequency domain, the EHT-SIG further comprising a plurality of user fields, the plurality of user fields comprising a plurality of station identification (ID) fields indicating an identification of a corresponding EHT station (STA) and spatial configuration fields, the spatial configuration fields indicating a number of spatial streams allocated to the corresponding EHT STA, wherein the EHT-SIG symbols field is 5 bits; and
encode a data portion of the EHT MU PPDU in accordance with the plurality of RU assignments, the plurality of user fields, and the spatial configuration fields; and
configure the EHT AP to transmit the EHT MU PPDU.
17. The apparatus of claim 16 , further comprising transceiver circuitry; the transceiver circuitry coupled to the processing circuitry.