Device, system, and method for wireless communications
Embodiments of a device, a system, and a method for wireless communications are disclosed. In an embodiment, a device includes a processor configured to initiate an assisted single-user (SU) transmission, where the device is a Transmission Opportunity (TXOP) owner that allocates part of a TXOP, and exchange frames according to the assisted SU transmission.
1. A device comprising:
a processor configured to:
initiate an assisted single-user (SU) transmission, wherein the device is a Transmission Opportunity (TXOP) owner that allocates part of a TXOP and the allocation is based on a resource request reported in a High Efficiency (HE) control field of a Quality of Service (QOS) Null frame or a QoS Data frame, the HE control field which defines a requested medium time for a reference bandwidth of 20 MHz and implicitly one quarter of the requested medium time for a reference bandwidth of 80 MHz; and
exchange frames with an STA according to the assisted SU transmission.
2. The device of claim 1 , wherein the device is an access point (AP) that allocates part of the TXOP to the station (STA) for an uplink (UL) frame transmission, and wherein the AP remains the TXOP owner during an allocated time.
3. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA for a peer-to-peer (P2P) frame transmission, and wherein the STA becomes the TXOP owner during an allocated time.
4. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA for a mixed P2P and UL frame transmission, and wherein the STA becomes the TXOP owner during an allocated time.
5. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA, and wherein the STA releases the TXOP allocation back to the AP via an explicit indication included in a reserved bit in a context-aware service (CAS) control field of the High Efficiency (HE) Control field of a QoS null frame when the STA has no frames to transmit.
6. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA, and wherein the STA reports the resource request to the AP for the assisted SU transmission.
7. The device of claim 6 , wherein the resource request is reported via at least one of a Quality of Service (QOS) Control field, a Buffer Status Report (BSR) Control field, and the HE Control field.
8. The device of claim 6 , wherein the resource request indicates at least one of:
the requested medium time and a Traffic Identifier (TID); and
the requested medium time, the TID, and the reference bandwidth.
9. The device of claim 8 , wherein the requested medium time indicates a medium time requested for requested TIDs.
10. The device of claim 8 , wherein the TID indicates a TID with highest priority amongst TIDs whose medium time is requested.
11. The device of claim 8 , wherein the reference bandwidth indicates at least one of a bandwidth used for a P2P frame transmission and a maximum allowed bandwidth.
12. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA for a P2P frame transmission, and wherein the AP initiates the assisted SU transmission by transmitting a Clear to Send (CTS)-to-Self frame and a multi-user (MU) Request to Send (RTS) (MU-RTS) TXOP Sharing (TXS) frame.
13. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA which is a first STA, and wherein the assisted SU transmission includes:
transmitting, by the first STA to the AP, a CTS frame in response to receiving an MU-RTS TXS frame, wherein the CTS frame includes a Duration field with a value of DURATION; and
transmitting, by the first STA to a second STA, a CTS-to-Self frame whose Duration field is more than DURATION minus Short Interframe Space (SIFS) minus a transmission time of a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) that includes the CTS-to-Self frame.
14. The device of claim 13 , wherein the second STA sets a network allocation vector (NAV) timer in response to receiving the CTS-to-Self frame.
15. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA which is a first STA, and wherein the assisted SU transmission includes:
transmitting, by the first STA to the AP, a CTS frame in response to receiving an MU-RTS TXS frame; and
transmitting, by the first STA to a second STA, a frame with a Duration field in at least one of a Media Access Control (MAC) header and a physical layer (PHY) header.
16. The device of claim 15 , wherein the Duration field is set no later than an ending time within the TXOP allocated to the first STA.
17. The device of claim 1 , wherein the device is an AP that allocates part of the TXOP to the STA, and wherein the assisted SU transmission is an AP assisted SU transmission.
18. The device of claim 1 , wherein the device is an STA that allocates part of the TXOP to another STA, and wherein the assisted SU transmission is an STA assisted SU transmission.
19. A system comprising:
an access point (AP), wherein the AP includes a processor configured to:
initiate an AP assisted single-user (SU) transmission, wherein the AP is a Transmission Opportunity (TXOP) owner that allocates part of a TXOP and the allocation is based on a resource request reported in a High Efficiency (HE) control field of a Quality of Service (QOS) Null frame or a QoS Data frame, the HE control field which defines a requested medium time for a reference bandwidth of 20 MHz and implicitly one quarter of the requested medium time for a reference bandwidth of 80 MHz; and
a station (STA), wherein the STA includes another processor configured to:
exchange frames with the AP according to the AP assisted SU transmission.
20. A method of wireless communications, the method comprising:
initiating, by a device, an assisted single-user (SU) transmission, wherein a Transmission Opportunity (TXOP) owner allocates part of a TXOP and the allocation is based on a resource request reported in a High Efficiency (HE) control field of a Quality of Service (QOS) Null frame or a QoS Data frame, the HE control field which defines a requested medium time for a reference bandwidth of 20 MHz and implicitly one quarter of the requested medium time for a reference bandwidth of 80 MHz; and
exchanging, by the device, frames with an STA according to the assisted SU transmission.