Method and arrangements relating to group transmission in a wireless communication network

A method, performed by one or more second devices, to support charging relating to a group transmission in a wireless communication network, said group transmission involving a group of wireless devices configured to, via one or more direct communication links between each other, participate in transmission of first data between a source wireless device and the wireless communication network, wherein the method comprises:

• initiating to receive, by a network node of the wireless communication network second data transmitted on a device specific group bearer in a core network of the wireless communication network, which second data relates to the group transmission and to a wireless device of the group, the device specific group bearer being configured specifically for data transmission usage relating to the wireless device when the data transmission is part of the group transmission;
• and
• the device specific group bearer being a device specific bearer for data transmission usage relating to the wireless device when the data transmission is separate from the group transmission, the device specific bearer being configured with an identifier that identifies the device specific bearer as currently used for data transmission that is part of the group transmission and relating to the wireless device, the device specific bearer being transformed to the device specific group bearer.

One or more first devices to support charging relating to a group transmission in a wireless communication network, said group transmission involving a group of wireless devices configured to, via one or more direct communication links between each other, participate in transmission of first data between a source wireless device and the wireless communication network, wherein said one or more first devices are configured to:

• initiate to transmit, to a network node of the wireless communication network, second data on a device specific group bearer in a core network of the wireless communication network, which second data relates to the group transmission and to a wireless device of the group, the device specific group bearer being configured specifically for data transmission usage relating to the wireless device when the data transmission is part of the group transmission;
• and
• the device specific group bearer being a device specific bearer for data transmission usage relating to the wireless device when the data transmission is separate from the group transmission, the device specific bearer being configured with an identifier that identifies the device specific bearer as currently used for data transmission that is part of the group transmission and relating to the wireless device, the device specific bearer being transformed to the device specific group bearer.