A relay server (12) and a relay server (23) share relay group information and relay server information.

The plurality of relay devices includes at least a first relay device and a second relay device.

Disclosed are a relay device, a relay method, a communications system, a relay control program, and a recoding medium.

The solution includes mutual authentication of relay node and relay UICC, mutual authentication of relay node and network, secure channel establishment between relay UICC and relay node.

When a user requests for a relay service, the relay control system selects a relay node on the basis of the effective relay service history record.

The relay service unit comprises a relay selection module and/or a relay sequencing module.

Accordingly, the second relay server performs a relay function instead of the first relay server.

The plurality of relay devices includes at least a first relay device and a second relay device.

The relay node BSR indicates a relay node uplink buffer status and/or a relay node downlink buffer status at the relay node.

A framework part of a relay and a relay.

Terminating the relay operations is initiated by the selected wireless relay.

The first relay and the second relay are mechanically interlocked with each other.