Process for transmitting and receiving low-latency data in wireless LAN system
One embodiment of the present specification relates to a method for performing low-latency communications. According to one embodiment, an interframe space (IFS) for low-latency data may be suggested. The interframe space for low-latency data may be set to be greater than PIFS and smaller than DIFS. On the basis of the interframe space for low-latency data, a reception STA may perform EDCA and transmit low-latency data to a transmission STA.
1. A method performed by a receiving station (STA) in a wireless local area network system, the method comprising:
receiving information on an inter-frame space (IFS) for low-latency data,
wherein the inter-frame space for the low-latency data is configured to be larger than a Point Coordination Function Inter-frame Space (PIFS) and smaller than a Distributed Inter-Frame Space (DIFS);
performing channel access through an Enhanced Distributed Channel Access (EDCA) based on the inter-frame space for the low-latency data; and
transmitting the low-latency data based on the channel access.
2. The method of claim 1 , wherein the method further comprises,
receiving information related to parameters for the EDCA.
3. The method of claim 1 ,
wherein the parameters for the EDCA include CWmin, CWmax, and TXOP limit.
4. The method of claim 3 ,
wherein the value of the CWmin is configured to 0.
5. The method of claim 1 ,
wherein the inter-frame space for the low-latency data is determined by an equation below,
<LLIFS=PIFS+Shift_time>
wherein the LLIFS means the inter-frame space for the low-latency data,
wherein the PIFS is configured to 25 μs, and
wherein the Shift_time is configured to one of 0 μs to 9 μs.
6. The method of claim 1 , wherein the method further comprises,
receiving, through a beacon frame, information related to a first duration in which the inter-frame space for the low-latency data is used.
7. The method of claim 6 , wherein performing the channel access through the EDCA based on the inter-frame space for the low-latency data comprises, performing the channel access through the EDCA, in the first duration, based on the inter-frame space for the low-latency data.
8. The method of claim 1 ,
wherein the low-latency data requires a time delay value lower than or equal to a threshold value.
9. A method performed by a transmitting STA in a wireless local area network system, the method comprising:
transmitting information related to the inter-frame space (IFS) for low-latency data,
wherein the inter-frame space for the low-latency data is configured to be larger than a Point Coordination Function Inter-frame Space (PIFS) and smaller than a Distributed Inter-Frame Space (DIFS); and
receiving the low-latency data based on the information related to the inter-frame space for the low-latency data.
10. A receiving STA in a wireless local area network system, the receiving STA comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor coupled to the transceiver, the processor is configured to:
receive information on an inter-frame space (IFS) for low-latency data,
wherein the inter-frame space for the low-latency data is configured to be larger than a Point Coordination Function Inter-frame Space (PIFS) and smaller than a Distributed Inter-Frame Space (DIFS);
perform channel access through an Enhanced Distributed Channel Access (EDCA) based on the inter-frame space for the low-latency data; and
transmit the low-latency data based on the channel access.
11. The receiving STA of claim 10 , wherein the processor is further configured to:
receive information related to parameters for the EDCA.
12. The receiving STA of claim 10 ,
wherein the parameters for the EDCA include CWmin, CWmax, and TXOP limit.
13. The receiving STA of claim 12 ,
wherein the value of the CWmin is configured to 0.
14. The receiving STA of claim 10 ,
wherein the inter-frame space for the low-latency data is determined by an equation below,
<LLIFS=PIFS+Shift_time>
wherein the LLIFS means the inter-frame space for the low-latency data,
wherein the PIFS is configured to 25 μs, and
wherein the Shift_time is configured to one of 0 μs to 9 μs.
15. The receiving STA of claim 10 , wherein the processor is further configured to:
receive, through a beacon frame, information related to a first duration in which the inter-frame space for the low-latency data is used.
16. The receiving STA of claim 15 , wherein the processor is further configured to:
perform the channel access through the EDCA, in the first duration, based on the inter-frame space for the low-latency data.
17. The receiving STA of claim 10 ,
wherein the low-latency data requires a time delay value lower than or equal to a threshold value.