Restrictive service period for power save devices

Abstract

This disclosure describes systems, methods, and apparatus related to a restrictive target wake time (TWT) service period (SP) system. A device may determine a beacon frame to be sent to one or more power save devices. The device may determine a time duration of a TWT SP associated with the one or more power save devices. The device may determine a first trigger frame including a cascade indication. The device may determine a first time associated with the first trigger frame. The device may cause to send the trigger frame to the one or more power save devices based at least in part on a remaining duration of the TWT SP.

What is claimed is: 
     
         1 . A device, comprising:
 at least one memory that stores computer-executable instructions; and   at least one processor configured to access the at least one memory, wherein the at least one processor is configured to execute the computer-executable instructions to:   determine a beacon frame to be sent to one or more power save devices;   determine a time duration of a target wake time (TWT) service period (SP) associated with the one or more power save devices;   determine a first trigger frame including a cascade indication;   determine a first time associated with the first trigger frame; and   cause to send the trigger frame to the one or more power save devices based at least in part on a remaining duration of the TWT SP.   
     
     
         2 . The device of  claim 1 , wherein the cascade indication is set to 1 to indicate an additional trigger frame transmission within the TWT SP. 
     
     
         3 . The device of  claim 1 , wherein the cascade indication is set to 0 to indicate a last trigger frame transmission within the TWT SP. 
     
     
         4 . The device of  claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
 determine an acknowledgment policy associated with a quality of service (QoS) field of the UL PPDU is set to a first value indicating an immediate acknowledgment;   set the cascade indication to 1 when the remaining duration is greater than or equal to a sum of two or more of a trigger frame duration, a short interfame space (SIFS) duration, an uplink (UL) MU Physical Layer Convergence Protocol PLCP Protocol Data Unit (PPDU) duration, an additional SIFS duration, and an acknowledgment duration; and   set the cascade indication to 0 when the remaining duration is less than the sum.   
     
     
         5 . The device of  claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to:
 determine an acknowledgment policy associated with a quality of service (QoS) field of the UL PPDU is set to a second value;   set the cascade indication to 1 when the remaining duration of the TWT SP is greater than or equal to a sum of a cascaded trigger frame duration, a short interfame space (SIFS) duration, and an uplink (UL) multi-user (MU) Physical Layer Convergence Protocol PLCP Protocol Data Unit (PPDU) duration; and   set the cascade indication to 0 when the remaining duration of the TWT SP is less than the sum.   
     
     
         6 . The device of  claim 1 , wherein the first time associated with the first trigger frame is a time when the first trigger frame is to be sent to at least one of the one or more power save devices. 
     
     
         7 . The device of  claim 1 , wherein the remaining duration of the TWT SP is a difference between a TWT SP end time and an end time associated with an end of the uplink or downlink multi-user operation solicited by the first trigger frame. 
     
     
         8 . The device of  claim 1 , wherein the first trigger frame is at least one of a cascaded trigger frame or a non-cascaded trigger frame. 
     
     
         9 . The device of  claim 4 , wherein the acknowledgment duration is at least one of a device acknowledgment (ACK) duration, a block acknowledgment (BA) duration, or a multi-device block acknowledgment (MBA) duration. 
     
     
         10 . The device of  claim 1 , further comprising a transceiver configured to transmit and receive wireless signals. 
     
     
         11 . The device of  claim 10 , further comprising at least one antenna coupled to the transceiver. 
     
     
         12 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:
 identifying a beacon received from a device;   determining a target wake time (TWT) service period (SP); and   identifying a trigger frame including a cascade indication based at least in part on a remaining duration of the TWT SP.   
     
     
         13 . The non-transitory computer-readable medium of  claim 12 , wherein the cascade indication is set to 1 to indicate an additional trigger frame transmission within the TWT SP. 
     
     
         14 . The non-transitory computer-readable medium of  claim 12 , wherein the cascade indication is set to 0 to indicate a last trigger frame transmission within the TWT SP. 
     
     
         15 . The non-transitory computer-readable medium of  claim 12 , wherein the remaining duration of the TWT SP is a difference between an end time of the TWT SP and a first time when the trigger frame is to be sent by the device. 
     
     
         16 . The non-transitory computer-readable medium of  claim 12 , wherein the trigger frame is at least one of a cascaded trigger frame or a non-cascaded trigger frame. 
     
     
         17 . The non-transitory computer-readable medium of  claim 12 , wherein the remaining duration of the TWT SP is greater than or equal to a sum of two or more of a trigger frame duration, a short interframe space (SIFS) duration, an uplink (UL) physical layer convergence protocol PLCP protocol data unit (PPDU) duration, and an acknowledgment duration, when an acknowledgment policy associated with a quality of service (QoS) field of the UL PPDU is set to 1. 
     
     
         18 . The non-transitory computer-readable medium of  claim 17 , wherein the acknowledgment duration is at least one of a device acknowledgment (ACK) duration, a block acknowledgment (BA) duration, or a multi-device block acknowledgment (MBA) duration. 
     
     
         19 . A method comprising:
 determining a beacon frame to be sent to one or more power save devices;   determining a time duration of a target wake time (TWT) service period (SP) associated with the one or more power save devices;   determining a first trigger frame including a cascade indication;   determining a first time associated with the first trigger frame; and   causing to send the trigger frame to the one or more power save devices based at least in part on a remaining duration of the TWT SP.   
     
     
         20 . The method of  claim 19 , wherein the cascade indication is set to 1 to indicate an additional trigger frame transmission within the TWT SP.