WAKE-UP PACKET BACKOFF PROCEDURE
Embodiments of a LP-WUR (low-power wake-up radio) wake-up packet backoff procedure are generally described herein. A first wireless device initiates a backoff procedure to contend for a wireless medium for transmission of a wake-up packet of a first access category, the wake-up packet encoded to be received at a LP-WUR (low-power wake-up radio) of a second wireless device. The first wireless device determines that the wake-up packet is to be retransmitted based on a parameter of the backoff procedure, the parameter being independent of the first access category. The first wireless device encodes for retransmission of the wake-up packet of a second access category, each of the first access category and the second access category comprising a level of priority in EDCA (enhanced distributed channel access).
1 . An apparatus of a first wireless device, the apparatus comprising:
memory; and processing circuitry, the processing circuitry to:
initiate a backoff procedure to contend for a wireless medium for transmission of a wake-up packet of a first access category, the wake-up packet encoded to be received at a LP-WUR (low-power wake-up radio) of a second wireless device;
determine that the wake-up packet is to be retransmitted based on a parameter of the backoff procedure, the parameter being independent of the first access category; and
encode for retransmission of the wake-up packet of a second access category, each of the first access category and the second access category comprising a level of priority in EDCA (enhanced distributed channel access).
2 . The apparatus of claim 1 , wherein the first access category is different from the second access category.
3 . The apparatus of claim 1 , wherein the first access category is identical to the second access category.
4 . The apparatus of claim 1 , wherein each of the first access category and the second access category comprises one of: Background (AC_BK), Best Effort (AC_BE), Video (AC_VI), and Voice (AC_VO), and wherein each of the first access category and the second access category is selected based on contention in at least one of AC_BK, AC_BE, AC_VI, and AC_VO.
5 . The apparatus of claim 1 , wherein the parameter comprises a retransmission counter of the wake-up packet, and wherein the processing circuitry to determine that the wake-up packet is to be retransmitted is to:
increase a retransmission counter by one when the wake-up packet is retransmitted; and
determine that the wake-up packet is to be retransmitted based on the retransmission counter being below a retransmission limit value.
6 . The apparatus of claim 1 , wherein the parameter comprises a lifetime timer of the wake-up packet, the processing circuitry to encode for retransmission of the wake-up packet responsive to a current time being before an expiration of the lifetime timer.
7 . The apparatus of claim 1 , wherein the processing circuitry is to encode for transmission of the wake-up packet in a MU (multi-user) transmission, and wherein the MU transmission comprises an OFDMA (orthogonal frequency division multiple access) or MU-MIMO (multiple-input multiple-output) transmission.
8 . The apparatus of claim 1 , wherein an acknowledgement procedure enables immediate response to the wake-up packet from the second wireless device to the first wireless device, the immediate response being transmitted by the LP-WUR or the WLAN radio of the second wireless device, and wherein the processing circuitry is further to:
update a CW (contention window) based on exponential backoff;
wherein the processing circuitry, to update the CW, is to one or more of:
update the CW under DCF (distributed coordination function);
update the CW access category under EDCAF (enhanced distributed channel access function);
update SSRC (station short retry count) or SLRC (station long retry count) under DCF; and
update QSRC (quality of service short retry count) access category or QLRC (quality of service long retry count) under EDCAF.
9 . The apparatus of claim 1 , wherein an acknowledgement procedure does not enable immediate response to the wake-up packet from the second wireless device to the first wireless device, and wherein the processing circuitry is further to:
forego updating a contention window associated with each level of priority in EDCA; and
forego updating a retry count used to update the contention window.
10 . The apparatus of claim 1 , wherein the second wireless device foregoes providing an acknowledgement of receipt of the wake-up packet to the first wireless device, and wherein the processing circuitry is further to:
forego updating a contention window associated with each level of priority in EDCA; and
forego updating a retry count used to update the contention window.
11 . The apparatus of claim 1 , further comprising transceiver circuitry to:
transmit the wake-up packet.
12 . The apparatus of claim 11 , further comprising an antenna coupled with the transceiver circuitry.
13 . A non-transitory machine-readable medium storing instructions for execution by processing circuitry of a first wireless device, the instructions causing the processing circuitry to:
initiate a backoff procedure to contend for a wireless medium for transmission of a wake-up packet of a first access category, the wake-up packet encoded to be received at a LP-WUR (low-power wake-up radio) of a second wireless device;
determine that the wake-up packet is to be retransmitted based on a parameter of the backoff procedure, the parameter being independent of the first access category; and
encode for retransmission of the wake-up packet of a second access category, each of the first access category and the second access category comprising a level of priority in EDCA (enhanced distributed channel access).
14 . The machine-readable medium of claim 13 , wherein the first access category is different from the second access category.
15 . The machine-readable medium of claim 13 , wherein the first access category is identical to the second access category.
16 . The machine-readable medium of claim 13 , wherein each of the first access category and the second access category comprises one of: Background (AC_BK), Best Effort (AC_BE), Video (AC_VI), and Voice (AC_VO), and wherein each of the first access category and the second access category is selected based on contention in at least one of AC_BK, AC_BE, AC_VI, and AC_VO.
17 . The machine-readable medium of claim 13 , wherein the parameter comprises a retransmission counter of the wake-up packet, and wherein the processing circuitry to determine that the wake-up packet is to be retransmitted is to:
increase a retransmission counter by one when the wake-up packet is retransmitted; and
determine that the wake-up packet is to be retransmitted based on the retransmission counter being below a retransmission limit value.
18 . The machine-readable medium of claim 13 , wherein the parameter comprises a lifetime timer of the wake-up packet, the processing circuitry to encode for retransmission of the wake-up packet responsive to a current time being before an expiration of the lifetime timer.
19 . The machine-readable medium of claim 13 , wherein the processing circuitry is to encode for transmission of the wake-up packet in a MU (multi-user) transmission, and wherein the MU transmission comprises an OFDMA (orthogonal frequency division multiple access) or MU-MIMO (multiple-input multiple-output) transmission.
20 . The machine-readable medium of claim 13 , wherein an acknowledgement procedure enables immediate response to the wake-up packet from the second wireless device to the first wireless device, the immediate response being transmitted by the LP-WUR or the WLAN radio of the second wireless device, and wherein the processing circuitry is further to:
update a CW (contention window) based on exponential backoff;
wherein the processing circuitry, to update the CW, is to one or more of:
update the CW under DCF (distributed coordination function);
update the CW access category under EDCAF (enhanced distributed channel access function);
update SSRC (station short retry count) or SLRC (station long retry count) under DCF; and
update QSRC (quality of service short retry count) access category or QLRC (quality of service long retry count) under EDCAF.
21 . The machine-readable medium of claim 13 , wherein an acknowledgement procedure does not enable immediate response to the wake-up packet from the second wireless device to the first wireless device, and wherein the processing circuitry is further to:
forego updating a contention window associated with each level of priority in EDCA; and
forego updating a retry count used to update the contention window.
22 . The machine-readable medium of claim 13 , wherein the second wireless device foregoes providing an acknowledgement of receipt of the wake-up packet to the first wireless device, and wherein the processing circuitry is further to:
forego updating a contention window associated with each level of priority in EDCA; and
forego updating a retry count used to update the contention window.
23 . A method, implemented at a first wireless device, the method comprising:
initiating a backoff procedure to contend for a wireless medium for transmission of a wake-up packet of a first access category, the wake-up packet encoded to be received at a LP-WUR (low-power wake-up radio) of a second wireless device;
determining that the wake-up packet is to be retransmitted based on a parameter of the backoff procedure, the parameter being independent of the first access category; and
encoding for retransmission of the wake-up packet of a second access category, each of the first access category and the second access category comprising a level of priority in EDCA (enhanced distributed channel access).
24 . The method of claim 23 , wherein the parameter comprises a retransmission counter of the wake-up packet, and wherein determining that the wake-up packet is to be retransmitted comprises:
increasing a retransmission counter by one when the wake-up packet is retransmitted; and
determining that the wake-up packet is to be retransmitted based on the retransmission counter being below a retransmission limit value.
25 . The method of claim 23 , wherein the parameter comprises a lifetime timer of the wake-up packet, the method comprising encoding for retransmission of the wake-up packet responsive to a current time being before an expiration of the lifetime timer.