Method and Network Node for Handling Beacon Signal Transmission

A method in a network node for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission and which network node is associated with a cellular communications network, the method comprising:

• obtaining information from a number of master devices within a specific area comprised in the cellular communications network, which respective information comprises information about location and capability of D2D transmission of the respective master devices;
• deciding properties for beacon signal transmission from a first master device, which deciding is based on the obtained information and the number of master devices within the specific area.

A method in a first master device for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission, which first master device is comprised in a number of master devices in a specific area within a cellular communications network, the method comprising:

• sending information to a network node associated with the cellular communications network, which information comprises information about location and capability of D2D transmission of the first master device;
• and
• receiving from the network node an indication of properties for beacon signal transmission, which beacon signal is to be transmitted from the first master device, and which properties are adapted to the number of master devices within the specific area and their respective location and capability of D2D transmission.

A method in a slave device for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission, and which slave device is comprised in a specific area within a cellular communications network, the method comprising:

• receiving from a network node associated with the cellular communications network, an indication of properties of beacon signal transmission, which beacon signal is to be transmitted from a first master device within the specific area to the slave device, which properties are adapted to the number of master devices within the specific area and their respective location and capability of D2D transmission.

A network node for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission, and which network node is associated with a cellular communications network, the network node comprising:

• an obtaining circuitry configured to obtain information from a number of master devices within a specific area comprised in the cellular communications network, which respective information comprises information about location and capability of D2D transmission of the respective master devices,
• a deciding circuitry configured to decide properties for beacon signal transmission from a first master device, which deciding is based on the obtained information, and the number of master devices within the specific area.

A first master device for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission, which first master device is arranged to be comprised in a number of master devices in a specific area within a cellular communications network, the first master device comprising:

• a transmitting circuitry configured to send information to a network node associated with the cellular communications network, which information comprises information about location and capability of D2D transmission of the first master device;
• and
• a receiving circuitry configured to receive an indication of properties for beacon signal transmission from the network node, which beacon signal is to be transmitted from the first master device, and which properties are adapted to the number of master devices within the specific area and their respective location and capability of D2D transmission.

A slave device for handling beacon signal transmission, which beacon signal transmission is for discovering devices for Device to Device (D2D) transmission, and which slave device is arranged to be comprised in a specific area within a cellular communications network, the slave device comprising:

• a receiving circuitry configured to receive from a network node associated with the cellular communications network, an indication of properties of beacon signal transmission, which beacon signal is to be transmitted from a first master device within the specific area to the slave device, which properties are adapted to the number of master devices within the specific area and their respective location and capability of D2D transmission.