Managing EDCA parameters with low latency reliable traffic
A network adopts Low Latency Reliable Service measures to ensure LLRS traffic has priority over not-LLRS traffic. LLRS capable and not-capable stations coexist and share the same wireless medium. LLRS not-capable stations complete an ongoing legacy contention free transmission TXOP regardless of any needs of station to transmit LLRS. LLRS transmissions thus wait for a long time before starting. An AP detects LLRS activity in the network and modify the EDCA TXOP limit parameter of a BSS to force the stations to reduce their TXOP while LLRS activity remains. The AP can organize a BSS for LLRS capable stations and another BSS for LLRS not-capable stations. Refusal for association to such BSSs or disassociation from such BSSs can include a code indicating to the refused/disassociated stations that a BSS more adapted to its LLRS capability is available.
1 . A communication method in a wireless network, the communication method comprising, at an access-point, AP:
receiving capabilities from a non-access-point, non-AP, station;
determining whether a capability of the non-AP station matches a capability of a first Basic Service Set, BSS, with respect to a low latency reliable service, LLRS;
transmitting, to the non-AP station, an association-related management frame refusing an association of the non-AP station with the first BSS managed by the AP or disassociating the non-AP station from the first BSS, wherein the association-related management frame includes a code indicating another BSS managed by the AP is available,
wherein transmitting the association-related management frame is responsive to determining no match.
2 . The method of claim 1 , wherein the non-AP station is LLRS capable and the first BSS is dedicated to LLRS not-capable non-AP stations.
3 . The method of claim 1 , wherein the non-AP station is not LLRS capable and the first BSS is dedicated to LLRS capable non-AP stations.
4 . The method of claim 1 , further comprising, at the AP, initiating said another BSS responsive to receiving a LLRS capability from the non-AP station.
5 . The method of claim 1 , further comprising, at the AP, upon detecting LLRS activity in the network, restricting the first BSS to LLRS capable non-AP stations or restricting the first BSS to LLRS not-capable non-AP stations.
6 . The method of claim 1 , further comprising, at the AP after the transmitting, receiving an association request from the non-AP station to associate with another BSS managed by the AP.
7 . The method of claim 6 , wherein a capability of the non-AP station matches a capability of said another BSS with respect to the LLRS.
8 . A wireless communication device comprising at least one microprocessor configured for carrying out the method of claim 1 .
9 . A non-transitory computer-readable medium storing a program which, when executed by a microprocessor or computer system in a wireless device, causes the wireless device to perform the method of claim 1 .
10 . The communication method according to claim 1 , further comprising:
scheduling a TWT service period during which a communication of non-low latency traffic is restricted;
wherein the capability of the first BSS with respect to the LLRS is a capability of suspending a communication of a traffic that is not a low latency sensitive traffic before the TWT service period is started.
11 . The communication method according to claim 1 , wherein
a limit of a length of a transmission opportunity, TXOP, in a BSS to which a non-AP station having the capability is associated is longer than a limit of a length of TXOP in other BSS to which non-AP station having the capability is not associated.
12 . A communication method in a wireless network, the communication method comprising, at a non-access-point, non-AP, station:
receiving, from an access point, AP, an association-related management frame refusing an association of the non-AP station with a first Basic Service Set, BSS, managed by the AP or disassociating the non-AP station from the first BSS, wherein the association-related management frame includes a code indicating another BSS managed by the AP is available,
wherein the code indicates that the first BSS is dedicated to low latency reliable service, LLRS, not-capable non-AP stations and another BSS dedicated to LLRS capable non-AP stations that is managed by the AP is available, or the code indicates that the first BSS is dedicated to LLRS capable non-AP stations and another BSS dedicated to LLRS not-capable non-AP stations that is managed by the AP is available.
13 . The method of claim 12 , further comprising, at the non-AP station, after the receiving, transmitting an association request to the AP to associate with another BSS managed by the AP.