Indicating channel usage in wireless network

A method comprising:

• detecting, in a first apparatus managing a first wireless network, a first frame from a second apparatus, the second apparatus managing a second wireless network;
• in response to said detection, determining in the first apparatus an identifier of the second apparatus from the frame and causing transmission of a first message comprising said identifier to a third apparatus;
• receiving, in the first apparatus as a response to the first message from the third apparatus, a second message comprising an information element specifying an operating channel of at least one wireless network and a further information element that enables the second apparatus to authenticate that the information element originates from the third apparatus;
• and
• in response to said reception, causing by the first apparatus transmission of a second frame comprising the information element and the further information element to the second apparatus.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to:
• detect a frame from an access node with which the apparatus is in an unassociated state, the frame comprising an information element specifying operating channel of at least one wireless network and a further information element;
• verify, on the basis of the further information element, that the information element originates from a source trusted by the apparatus;
• and
• upon verifying that the information element originates from the trusted source, configure a wireless network managed by the apparatus to operate on a channel different from the operating channel specified by the information element.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to:
• register a terminal device, including causing the apparatus to receive an identifier of the terminal device;
• detect after said registering that the terminal device is establishing or managing a first wireless network, wherein the detection is based on receiving a message comprising the identifier of the terminal device from an access node managing a second wireless network;
• upon said detection, cause transmission of a message comprising an information element specifying operating channel of at least one wireless network and a further information element that enables the terminal device to authenticate that the information element originates from said apparatus.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to:
• manage a first wireless network;
• detect a first frame from a second apparatus managing a second wireless network;
• in response to said detection, determine an identifier of the second apparatus from the frame and cause transmission of a first message comprising said identifier to a third apparatus;
• receive, as a response to the first message from the third apparatus, a second message comprising an information element specifying an operating channel of at least one wireless network and a further information element that enables the second apparatus to authenticate that the information element originates from the third apparatus;
• and
• in response to said reception, cause transmission of a second frame comprising the information element and the further information element to the second apparatus.