Co-existence for spatial reuse in wireless local area networks
An apparatus of a first high-efficiency (HE) access point (AP) or station for spatial reuse is the disclosed. The apparatus includes processing circuitry configured to: decode a first portion of a first packet; and if the first portion indicates the first packet was transmitted by a second HE AP or station and that the first packet is an overlapping basic service set (OBSS) packet, then if a preamble detect energy is below a threshold, cause to be transmitted a second packet simultaneously with a portion of the first packet after the first portion. The processing circuitry may be configured to determine the first portion was transmitted by the second HE AP or station if a field in a physical (PRY) header or a second field in a media access control (MAC) header indicate the first packet was transmitted by the second HE AP or station.
1. An apparatus of a first station, the apparatus comprising memory and processing circuitry coupled to the memory; the processing circuitry configured to:
decode a first portion of a first packet, the first portion comprising a preamble; and
when the first portion indicates the first packet was transmitted by a second station or an access point (AP) and that the first packet is an overlapping basic service set (OBSS) packet, then when a measured energy of the preamble is below an energy detect threshold, cause to be transmitted a second packet simultaneously with a portion of the first packet after the first portion.
2. The apparatus of claim 1 , wherein the processing circuitry is further configured to:
when the first portion indicates not to use a spatial reuse opportunity, then do not cause to be transmitted the second packet simultaneously with the portion of the first packet after the first portion.
3. The apparatus of claim 2 , wherein the first portion indicates not to use the spatial reuse opportunity in a field of a physical (PHY) header or in a field of a media access control (MAC) header.
4. The apparatus of claim 1 , wherein the processing circuitry configured to:
determine the first portion was transmitted by the second station or the AP when the first portion is a physical (PHY) header comprising a HE signal (HE-SIG) field.
5. The apparatus of claim 1 , wherein the processing circuitry is configured to:
determine the first portion was transmitted by the second station or the AP when a field in a physical (PHY) header or a second field in a media access control (MAC) header indicate the first packet was transmitted by the second station or AP.
6. The apparatus of claim 5 , wherein the field in the PHY header is one or more reserved bits in a service field, wherein the PHY header is a legacy PHY header, and wherein the field in the MAC header is one or more reserved bits in a high-throughput (HT) control field or one or more reserved bits in a very-high throughput (VHT) HT control field.
7. The apparatus of claim 1 , wherein the processing circuitry configured to:
determine the first packet is an OBSS packet when a color of a basic service set (BSS) of the first station is not the same as a color indicated in first portion, wherein the color indicated in the first portion is a field in a HE, physical (PHY) header or a field in a HE media access control (MAC) header.
8. The apparatus of claim 7 , wherein the processing circuitry is further configured to:
determine when the MAC header indicates the first packet is the OBSS packet when a MAC address subfield of the MAC header that indicates a basic service set identification (BSSID) is not the same as a BSSID of an access point the wireless device is associated with.
9. The apparatus of claim 1 , wherein the processing circuitry is further configured to:
wait a backoff window duration, and determine a clear channel assessment (CCA) after the backoff, then when the CCA indicates a clear channel, cause to be transmitted the second packet simultaneously with a portion of the first packet after the first portion of the first packet.
10. The apparatus of claim 1 , wherein the processing circuitry is further configured to:
determine a transmit power based on a subfield in a physical (PHY) header of the first portion or a subfield in a media access control (MAC) header and a received energy of at least the PHY header, wherein the subfield indicates at least one from the following group: a transmission power used to transmit the first packet; a tolerable interference, or a sum of both; and
cause to be transmitted with the determined transmit power the second packet simultaneously after the first portion of the first packet.
11. The apparatus of claim 1 ; wherein the first station, the second station, and the AP are each one from the following group: a HE master station, a HE station, Institute of Electrical and Electronic Engineering (IEEE) 802.11ax station, and an IEEE 802.11ax access point.
12. The apparatus of claim 1 , wherein the processing circuitry is configured to transmit and receive in accordance with orthogonal frequency division multiple access (OFDMA) and multi-user orthogonal frequency division multiple access (MU-MIMO) within a transmission opportunity (TXOP).
13. The apparatus of claim 1 ; further comprising transceiver circuitry coupled to the processing circuitry.
14. The apparatus of claim 1 , further comprising one or more antennas coupled to the processing circuitry.
15. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations to configure a first station to:
decode a first portion of a first packet, the first portion comprising a preamble; and
when the first portion indicates the first packet was transmitted by a second station or an access point (AP) and that the first packet is an overlapping basic service set (OBSS) packet, then when a measured energy of the preamble is below an energy detect threshold, cause to be transmitted a second packet simultaneously with a portion of the first packet after the first portion.
16. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further configure the wireless device to:
determine the first portion was transmitted by the second station or the AP when the first portion is a physical (PHY) header comprising a HE signal (HE-SIG) field.
17. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further configure the wireless device to:
determine the first portion was transmitted by the second station or the AP when a field in a physical (PHY) header or a second field in a media access control (MAC) header indicate the first packet was transmitted by the second HE AP or station.
18. The non-transitory computer-readable storage medium of claim 15 , wherein the field in the PHY header is one or more reserved bits in a service field, wherein the PHY header is a legacy PHY header, and wherein the field in the MAC header is one or more reserved bits in a high-throughput (HT) control field or one or more reserved bits in a very-high throughput (VHT) HT control field, and wherein the MAC header is a legacy MAC header.
19. A method performed by a first station, the method comprising:
decoding a first portion of a first packet, the first portion comprising a preamble; and
when the first portion indicates the first packet was transmitted by a second station or an access point (AP) and that the first packet is an overlapping basic service set (OBSS) packet, then if when a measured energy of the preamble is below an energy detect threshold, causing to be transmitted a second packet simultaneously with a portion of the first packet after the first portion.
20. The method of claim 19 , the method further comprising:
determining the first portion was transmitted by the second station or the AP when a field in a physical (PHY) header or a second field in a media access control (MAC) header indicate the first packet was transmitted by the second station or the AP.
21. An apparatus of a first access point (AP), the apparatus comprising memory and processing circuitry coupled to the memory, the processing circuitry configured to:
encode a first portion of a first packet to indicate a spatial reuse opportunity with a transmission of a first packet;
encode the first portion to indicate a basic service set (BSS) packet of the wireless device; and
cause to be transmitted the first packet.
22. The apparatus of claim 21 , wherein the first portion comprises a legacy physical (PHY) header, and wherein the processing circuitry is further configured to:
encode a service field of the legacy PHY header to indicate the spatial reuse opportunity.
23. The apparatus of claim 21 , wherein the first portion comprises a legacy media access control (MAC) header, and wherein the processing circuitry is configured to:
encode a reserved bit or bits in a high-throughput (HT) control field or a reserved bit or bits in a very high-throughput (VHT) control field of the legacy MAC header to indicate the spatial reuse opportunity.
24. The apparatus of claim 21 , wherein the first portion is to comprise a subfield that indicates that the first packet is available or not available for the spatial reuse opportunity.
25. The apparatus of claim 21 , further comprising one or more antennas coupled to the processing circuitry.