Peer to peer communication system

A communication system comprising: a server storing a second device identifier for a second wireless device and a second user ID associated with a second user; wherein upon the server identifying that the second user ID is stored on a first wireless device, transmitting the second user ID and the second device ID to the first device to allow the first device to associate the second device with the second user; and wherein upon the first device identifying that the second device is within peer to peer communication range of the first device, the first device is arranged to provide an indication that the second device is available for establishing a connection with the first device. Communication can be set up by a user who recognises a user ID rather than a device ID. The communication may comprise Wi-Fi Direct or Bluetooth. If the second user uses a third device, the server may store the second user ID with the third device ID. The user IDs may be names, and the device IDs may be MAC addresses, SIM numbers, SSIDs or IP addresses. If the devices are out of range, they may communicate via a router or base station.