Abstract: A base station for a communication system and a handoff method thereof are provided. The base station comprises a transceiver and a processor. The transceiver receives a measurement report message with a present reference signal received quality from a wireless device. The processor electrically connected to the transceiver calculates a next report period, estimates a next reference signal received quality and adjusts a first threshold according to a variance of a reference signal received quality. The processor further enables the transceiver to transmit a first measurement control message to the wireless device according to the next report period. The handoff decision process is triggered based on the first threshold and the next reference signal received quality.

Abstract: A base station for a communication system and a handoff method thereof are provided. The base station comprises a transceiver and a processor. The transceiver receives a measurement report message with a present reference signal received quality from a wireless device. The processor electrically connected to the transceiver calculates a next report period, estimates a next reference signal received quality and adjusts a first threshold according to a variance of a reference signal received quality. The processor further enables the transceiver to transmit a first measurement control message to the wireless device according to the next report period. The handoff decision process is triggered based on the first threshold and the next reference signal received quality.

Abstract: A mobile station, an access point, a gateway apparatus, a base station, and a handshake method thereof for use in a wireless network framework are provided. The wireless network framework comprises a first wireless network comprising the access point, and a second wireless network comprising the gateway apparatus and base station. There is an IP security tunnel between the access point and the gateway apparatus. When the mobile station handovers from the first wireless network to the second wireless network, it transmits a master session key to the gateway apparatus via the access point and the IP security tunnel. Additionally, when the mobile station handovers from the second wireless network to the first wireless network, it transmits a master session key to the access point. As a result, the authentication time, which is needed in handover procedure between the first wireless network and the second wireless network, is reduced effectively.

Abstract: A mobile station, an access point, a gateway apparatus, a base station, and a handshake method thereof for use in a wireless network framework are provided. The wireless network framework comprises a first wireless network comprising the access point, and a second wireless network comprising the gateway apparatus and base station. There is an IP security tunnel between the access point and the gateway apparatus. When the mobile station handovers from the first wireless network to the second wireless network, it transmits a master session key to the gateway apparatus via the access point and the IP security tunnel. Additionally, when the mobile station handovers from the second wireless network to the first wireless network, it transmits a master session key to the access point. As a result, the authentication time, which is needed in handover procedure between the first wireless network and the second wireless network, is reduced effectively.

Abstract: An apparatus and method for renewing a key, a computer readable media thereof, and a wireless network comprising the same are provided. The method is adapted to the first base station. The first base station belongs to a wireless network. The first base station uses a first key and has a first coverage. The method comprises the following steps: determining that the mobile device moves from the first coverage to the second coverage of a second base station; determining that the login time of the mobile device is later than the renewing time of the first key; renewing the first key; and sending the first key to the mobile device.