Abstract: A system, an apparatus and related method for roaming in DECT-VoIP network are provided. The system for roaming in DECT-VoIP network includes at least a DECT-VoIP handset, and at least a DECT-VoIP apparatus. The system can be connected to the Internet through connecting the DECT-VoIP apparatus to appropriate internet access device, such as, ADSL modem or IP PBX so as to make and receive phone calls through VoIP. With presetting the VoIP client account information at the DECT-VoIP handset, the DECT-VoIP handset can roam from the coverage of a first DECT-VoIP apparatus previously registered with to the coverage of a second DECT-VoIP apparatus sharing the same ID with the first DECT-VoIP apparatus without interruption to the connection.

Abstract: An access scheme for a wireless LAN station to connect an access point on the network. This scheme allows a wireless station to finish all the processes from search to registration with an AP at a very high speed. Firstly, the time interval of beacon transmission is shortened when a wireless station is powered on. Secondly, the authentication phase in traditional registration with an AP is eliminated. Instead, a period of time on each channel is reserved. Accordingly, the wireless LAN station can use this period to exchange control frames with the AP without competing with other stations to access wireless medium. This results in quick access to the network.