Prioritized service period for time sensitive transmissions
Embodiments of the present invention provide A TID-based RTWT SP that can be configured for either trigger-based transmission or EDCA-based transmission for time sensitive traffic to reduce the chance of contention/collision on time sensitive traffic caused by non-time sensitive traffic using an EDCA mechanism. This can also reduce the chance of contention on time sensitive traffic when both trigger-based transmission and EDCA-based-transmission are used in the same TID-based RTWT SP. The AP MLD can dynamically adjust the schedule of TID-SPs for ether trigger-based or EDCA-based transmission and announce the new schedule of the TID-SPs according to the requirements of time sensitive traffic and/or traffic load condition, and can prioritize time sensitive transmission to meet QoS requirements.
1. A method of wireless data transmission in a wireless time sensitive network (TSN) by a wireless TSN-capable access point (AP) multi-link device (MLD), the method comprising:
scheduling a traffic identifier service period (TID-SP) for performing time sensitive transmission with a wireless station (STA) MLD;
transmitting a broadcast restricted target wake time (RTWT) element comprising the TID-SP in a beacon frame;
receiving data during the TID-SP from an STA affiliated with the STA MLD;
adjusting a schedule of the TID-SP according to a requirement concerning at least one of:
a time sensitive transmission; and a traffic load condition; and
announcing a new schedule of the TID-SP; and
dynamically changing the schedule of TID-SP to enhanced distributed channel access (EDCA) transmission or to trigger-based (TB) transmission.
2. The method of claim 1 , wherein the scheduling a TID-SP comprises scheduling a TID-SP for enhanced distributed channel access (EDCA) transmission.
3. The method of claim 1 , wherein the scheduling a TID-SP comprises scheduling a TID-SP for trigger-based (TB) transmission.
4. The method of claim 1 , further comprising receiving an indication of RTWT TID-SP capability from the STA during an association process.
5. The method of claim 1 , further comprising receiving a target wake time (TWT) Setup Request comprising an SP type and TID information for establishing RTWT SP of the TID, wherein the SP type comprises at least one of: trigger-based transmission of the TID; and enhanced distributed channel access-based transmission of the TID.
6. The method of claim 1 , further comprising transmitting a target wake time (TWT) setup response comprising SP type, and TID information and transmission parameters to confirm a restricted TWT (RTWT) TID-SP.
7. The method of claim 1 , further comprising prioritizing a time sensitive transmission to meet a quality of service (QOS) requirement.
8. A method of wireless data transmission in a wireless time sensitive network (TSN) by a wireless station (STA) multi-link device (MLD), the method comprising:
receiving a restricted target wake time (RTWT) element comprising a traffic identifier service period (TID-SP) in a beacon frame from an AP MLD, wherein the AP MLD schedules the TID-SP for performing time sensitive transmission for receipt by the wireless STA MLD; and
transmitting data during the TID-SP to the AP MLD, wherein the transmitting comprises:
receiving a trigger frame in the trigger based TID-SP;
performing a trigger-based (TB) response; and
transmitting a TB physical layer protocol data unit (PPDU) comprising a MAC Service Data Unit (MSDU) with a TID permitted in the TID-SP.
9. The method of claim 8 , wherein the transmitting data during the TID-SP to the AP MLD comprises:
performing enhanced distributed channel access (EDCA) or priority EDCA to acquire a wireless medium of the wireless network; and
transmitting a PPDU comprising a MAC Service Data Unit (MSDU) with a TID equal to a TID permitted in the TID-SP.
10. The method of claim 8 , further comprising transmitting an indication of RTWT TID-SP capability to the AP during an association process.
11. The method of claim 8 , further comprising transmitting a target wake time (TWT) Setup Request comprising an SP type and TID information for establishing an RTWT SP of a TID, wherein the SP type comprises at least one of: trigger-based transmission of the TID; and enhanced distributed channel access-based (EDCA) transmission of the TID.
12. The method of claim 8 , further comprising receiving a target wake time (TWT) setup response comprising SP type, TID information and transmission parameters to confirm a restricted TWT (RTWT) TID-SP.
13. The method of claim 8 , further comprising:
performing priority enhanced distributed channel access (EDCA) for channel access; and
transmitting a PPDU comprising a MAC Service Data Unit (MSDU) with a TID permitted for the TID-SP, wherein the TID-SP is not scheduled for the STA affiliated with the STA MLD.
14. An apparatus for wireless data transmission in a wireless time sensitive network (TSN) by a wireless access point (AP) multi-link device (MLD), the apparatus comprising:
a processor;
a memory coupled to the processor operable to store data; and
a plurality of radios operable to perform wireless TSN transmission, and wherein the processor is operable to:
schedule a traffic identifier service period (TID-SP) for performing time sensitive transmission with a wireless station (STA) MLD;
transmit the TID-SP in target wake time (TWT) element in a beacon frame; and
receive data during the TID-SP from the STA MLD;
dynamically change the TID-SP to enhanced distributed channel access (EDCA) transmission; and
announce a new schedule of the TID-SP.
15. The apparatus of claim 14 , wherein the processor is further operable to:
adjust a schedule of the TID-SP; and
announce the new schedule of TID-SP according to a requirement of at least one of: a time sensitive transmission; and a traffic load condition.