Method for accessing hybrid network, and gateway apparatus, wireless terminal and communication system thereof

A gateway apparatus for accessing a hybrid network including a wireless wide area network and a wireless distributed network, comprising:

• a wide area network transceiving unit for transmitting and receiving signals in the wireless wide area network;
• a distributed network transceiving unit for transmitting and receiving signals in the wireless distributed network;
• a timer unit for detecting whether current time is an integer multiple of a periodic time, and periodically enabling a sensing unit to sense a channel of the wireless distributed network;
• and
• the sensing unit for sensing the channel of the wireless distributed network at the enabling time instant instructed by the timer unit.

A wireless terminal which performs communication through a relay of a gateway apparatus in a hybrid network including a wireless wide area network and a wireless distributed network, the wireless terminal comprising:

• a distributed network transceiving unit for transmitting and receiving signals in the wireless distributed network;
• a transmission control unit for controlling transmission and reception of signals in the wireless distributed network, and clocking;
• a delay unit for receiving an instruction from the transmission control unit and delaying;
• and
• a transmission storage unit for storing packets to be transmitted;
• if there is a packet to be transmitted in the transmission control unit, and when the distributed network transceiving unit receives a synchronization signaling for synchronizing with a downlink common control channel regularly transmitted on a transmission frequency band of the wireless distributed network by a base station of the wireless wide area network, the transmission control unit orders the distributed network transceiving unit to transmit a relay request signal requesting to relay a data packet to be transmitted by the wireless terminal after receiving the synchronization signaling.