Wireless station and communication method for determining transmission to another wireless station in a cell in view of an interference cell
View Patent ↗A wireless station that belongs to a communication cell includes a receiver which, in operation, receives a trigger frame transmitted from an access point that belongs to an interference cell and a controller which, in operation, determines, based on at least one parameter included in the trigger frame and reception power value of the trigger frame received at the wireless station, whether the wireless station is allowed to transmit to other wireless station that belongs to the communication cell, wherein the at least one parameter includes a value set based on transmit power value of the trigger frame transmitted from the access point.
1. A first wireless station that belongs to a Basic Service Set (BSS), comprising:
a receiver, which, in operation, receives a trigger frame transmitted from an Access Point (AP) that belongs to an overlapping BSS (OBSS), the trigger frame soliciting uplink multiuser signals from a plurality of wireless stations that belong to the OBSS; and
a transmitter, which, in operation, transmits a signal to a second wireless station that belongs to the BSS in spatial reuse operation while the uplink multiuser signals are being transmitted,
wherein the spatial reuse operation is restricted based on a class of the first wireless station, the class indicating Received Signal Strength Indicator (RSSI) measurement precision.
2. The first wireless station according to claim 1 , wherein the first wireless station comprises circuitry, which, in operation, determines whether the first wireless station performs the spatial reuse operation based on the class of the first wireless station.
3. The first wireless station according to claim 1 , wherein the first wireless station comprises circuitry, which, in operation, decodes the received trigger frame and extracts a plurality of parameters encoded and included in the trigger frame.
4. The first wireless station according to claim 3 , wherein the circuitry, in operation, determines whether the first wireless station performs the spatial reuse operation based on the plurality of parameters.
5. The first wireless station according to claim 4 , wherein one of the plurality of parameters is a target RSSI indicating a target reception power value of the uplink multiuser signals to be measured at the AP, and
the circuitry, in operation, determines whether the first wireless station performs the spatial reuse operation based on the target RSSI.
6. The first wireless station according to claim 5 , wherein the circuitry, in operation, determines whether the first wireless station performs the spatial reuse operation based on the class of the first wireless station.
7. The first wireless station according to claim 4 , wherein one of the plurality of parameters is an AP transmit power indicating a transmit power of the trigger frame, and
the circuitry, in operation, determines whether the first wireless station performs the spatial reuse operation based on the AP transmit power.
8. The first wireless station according to claim 4 , wherein one of the plurality of parameters is an allowable interference level, and
the circuitry, in operation, determines whether the first wireless station performs the spatial reuse operation based on the allowable interference level.
9. The first wireless station according to claim 4 , wherein the circuitry, in operation, adjust a transmit power of the signal based on the plurality of parameters.
10. The first wireless station according to claim 4 , wherein the circuitry, in operation, sets a period during which the spatial reuse operation is allowed.
11. A first wireless station that belongs to a Basic Service Set (BSS), comprising:
a receiver, which, in operation, receives a signal transmitted from another wireless station that belongs to an overlapping BSS (OBSS); and
a transmitter, which, in operation, transmits a transmission signal to a second wireless station that belongs to the BSS in spatial reuse operation while wireless communication of the OBSS is in operation,
wherein the spatial reuse operation is restricted based on the signal and a class of the first wireless station, the class indicating Received Signal Strength Indicator (RSSI) measurement precision.
12. A communication method for a first wireless station that belongs to a Basic Service Set (BSS), comprising:
receiving a trigger frame transmitted from an Access Point (AP) that belongs to an overlapping BSS (OBSS), the trigger frame soliciting uplink multiuser signals from a plurality of wireless stations that belong to the OBSS; and
transmitting a signal to a second wireless station that belongs to the BSS in spatial reuse operation while the uplink multiuser signals are being transmitted,
wherein the spatial reuse operation is restricted based on a class of the first wireless station, the class indicating Received Signal Strength Indicator (RSSI) measurement precision.