Radio communication device and radio communication method
Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit ( 107 ) of the radio communication device (SR initiator) ( 100 ) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device ( 100 ) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit ( 101 ) transmits the SR signal by using the determined transmission resources.
1 . An integrated circuit for a communication apparatus, comprising:
an output, which, in operation, outputs an electronic signal; and
controller circuitry, which is coupled to the output and which, in operation, controls:
determining a transmission resource for a Spatial Reuse (SR) signal based on radio quality information transmitted from another communication apparatus, wherein the radio quality information is set based on a measurement result acquired by the another communication apparatus; and
transmitting the SR signal using the transmission resource in an SR operation with respect to one or more communication apparatuses other than the communication apparatus.
2 . The integrated circuit apparatus according to claim 1 , wherein
the communication apparatus and the another communication apparatus belong to a first Basic Service Set (BSS), and
the one or more communication apparatuses other than the communication apparatus belong to a second BSS which is an overlapping BSS of the first BSS.
3 . The integrated circuit according to claim 2 , wherein
the controller circuitry controls:
determining, based on the radio quality information, a band in which the SR signal is sendable, and
transmitting the SR signal in the band in which the SR signal is sendable, and not transmitting the SR signal in a band other than the band in which the SR signal is sendable.
4 . The integrated circuit according to claim 2 , wherein
the controller circuitry controls:
determining the transmission resource when transmitting the SR signal in a period defined by a signal from the second BSS, and
not determining the transmission resource when not transmitting the SR signal in the period.
5 . The integrated circuit according to claim 2 , wherein the radio quality information indicates radio quality of each band.
6 . The integrated circuit according to claim 5 , wherein each band is a band in units of resource units (RUs).
7 . The integrated circuit according to claim 5 , wherein each band is a band in units of 20 MHz.
8 . The integrated circuit according to claim 2 , wherein
the radio quality information indicates one of: whether or not the SR signal is receivable by the communication apparatus; whether or not an interference level in the communication apparatus is lower than a threshold; the interference level in the communication apparatus; or received quality of communication from the communication apparatus to the another communication apparatus.
9 . The integrated circuit according to claim 2 , wherein the radio quality information indicates radio quality of each of the first BSS and the second BSS.
10 . The integrated circuit according to claim 2 , wherein the radio quality information indicates radio quality of a BSS that belongs to a first group including the first BSS, and radio quality of a BSS that belongs to a second group which is different from the first group.
11 . The integrated circuit apparatus according to claim 2 , wherein
the radio quality information includes received quality of communication from the communication apparatus to the another communication apparatus, and
the controller circuitry controls:
calculating, based on the received quality, a first transmission power satisfying a predetermined error rate in the another communication apparatus, calculating a second transmission power based on a signal from the second BSS, and responsive to the second transmission power exceeding the first transmission power, determining to transmit the SR signal.
12 . The integrated circuit according to claim 11 , wherein a transmission power of the SR signal is greater than the first transmission power and is less than the second transmission power.