Access point and transmission method

Abstract

The present invention provides a transmission device and transmission method that are capable of improving reception quality during cooperative communication. A first transmission device according to the present invention comprises: a control circuit which, if the first transmission device and a second transmission device are carrying out transmission in cooperation, generates first control information that includes information common to at least a portion of second control information transmitted by the second transmission device in a second preamble; and a transmission circuit which transmits the first control information in a first preamble.

Claims

1. The first access point (AP), A control circuit that generates first control information which includes information common to at least a portion of the second control information contained in the second preamble, which is a component of the second signal transmitted by the second AP, when the first AP and the second AP simultaneously transmit the first signal and the second signal in a coordinated manner, A transmitting circuit that transmits a first signal whose components include a first preamble containing the first control information, Equipped with, The first signal is transmitted to the first station (STA) associated with the first AP, The second signal is transmitted to the second STA associated with the second AP, The first control information includes a first SIG field and a second SIG field, The second SIG field includes a Common field, a first User field for the first STA, and a second User field for the second STA. The aforementioned common information is the Basic Service Set (BSS) color included in the first SIG field. The control circuit sets the identification information of the first STA and the identification information of the second STA in the first User field and the second User field, respectively. First AP.

2. The control circuit sets information identifying the first AP in the user field of the first preamble. The first AP according to claim 1.

3. The control circuit transmits information regarding the change in the setting of the first control information to the receiving device targeted for coordinated transmission before transmitting the first preamble. The first AP according to claim 1.

4. The first access point (AP) When the first AP and the second AP simultaneously transmit the first signal and the second signal, respectively, first control information is generated that includes information common to at least a portion of the second control information contained in the second preamble, which is a component of the second signal transmitted by the second AP. A first signal is transmitted, the first preamble containing the first control information being used as a component. The first signal is transmitted to the first station (STA) associated with the first AP, The second signal is transmitted to the second STA associated with the second AP, The first control information includes a first SIG field and a second SIG field, The second SIG field includes a Common field, a first User field for the first STA, and a second User field for the second STA. The aforementioned common information is the Basic Service Set (BSS) color included in the first SIG field. The identification information of the first STA and the identification information of the second STA are set in the first User field and the second User field, respectively. Sending method.

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