Abstract: An authentication method for user equipment (UE) and LIPA network entities is applicable to a cross-LIPA communication environment having an UE end, a visiting LIPA network entity end (LIPAV), and a home LIPA network entity end (LIPAH). The UE end successfully registers to a core network (CN) via the LIPAV, thereby attaining mutual trust relationship between the UE end and the LIPAV. The UE end successfully registers to the CN via the LIPAH, thereby attaining mutual trust relationship between the UE end and the LIPAH. The LIPAH requests the UE end via the LIPAV for successfully re-authenticating the CN, thereby attaining mutual trust relationship between the LIPAV and the LIPAH.

Abstract: An authentication method for user equipment (UE) and LIPA network entities is applicable to a cross-LIPA communication environment having an UE end, a visiting LIPA network entity end (LIPAV), and a home LIPA network entity end (LIPAH). The UE end successfully registers to a core network (CN) via the LIPAV, thereby attaining mutual trust relationship between the UE end and the LIPAV. The UE end successfully registers to the CN via the LIPAH, thereby attaining mutual trust relationship between the UE end and the LIPAH. The LIPAH requests the UE end via the LIPAV for successfully re-authenticating the CN, thereby attaining mutual trust relationship between the LIPAV and the LIPAH.

Abstract: With the aid of critical conditions including remaining power of a communication module and both an available bandwidth and a credit of utilizing communication functions of said communication module, and by cooperating with available network services of said communication module, a communication network currently appropriates for said communication module to be switched to is determined, for achieving an aim of retrieving network services and taking requirements of users into consideration simultaneously. Moreover, when there are no available network services for the communication module, said communication module enters a sleep state for about less than ten seconds, for preventing said communication module from consuming additional power or from bringing in unnecessary consumption in other aspects, where both the additional power and the unnecessary consumption in other aspects are caused from the fact that the communication module searches for available network services continuously.

Abstract: An application-oriented and intelligent method for switching communication modes of a dual-mode communication module is provided. Whether the application program utilizes location-based service is first confirmed. When the application program utilizes location-based service, said communication module is switched to the first communication mode. Otherwise, evaluation, about which one from both the first communication mode and the second communication mode is more beneficial for a user, is performed on the communication module, according to both an available bandwidth and quality of service provided by a communication mode and to both a power and a credit of utilizing communication functions of the communication module. At last, a result of the evaluation is utilized for determining which communication mode from both the first communication mode and the second communication mode to be utilized by the communication module.

Abstract: An application-oriented and intelligent method for switching communication modes of a dual-mode communication module is provided. Whether the application program utilizes location-based service is first confirmed. When the application program utilizes location-based service, said communication module is switched to the first communication mode. Otherwise, evaluation, about which one from both the first communication mode and the second communication mode is more beneficial for a user, is performed on the communication module, according to both an available bandwidth and quality of service provided by a communication mode and to both a power and a credit of utilizing communication functions of the communication module. At last, a result of the evaluation is utilized for determining which communication mode from both the first communication mode and the second communication mode to be utilized by the communication module.

Abstract: With the aid of critical conditions including remaining power of a communication module and both an available bandwidth and a credit of utilizing communication functions of said communication module, and by cooperating with available network services of said communication module, a communication network currently appropriates for said communication module to be switched to is determined, for achieving an aim of retrieving network services and taking requirements of users into consideration simultaneously. Moreover, when there are no available network services for the communication module, said communication module enters a sleep state for about less than ten seconds, for preventing said communication module from consuming additional power or from bringing in unnecessary consumption in other aspects, where both the additional power and the unnecessary consumption in other aspects are caused from the fact that the communication module searches for available network services continuously.

Abstract: This invention proposes a mobility management method and system for wireless data networks, such as GPRS and UMTS systems. The wireless data network consists of at least one mobile device and one network apparatus. The cells in a wireless data network are partitioned into several routing areas. In the wireless data network, the mobility management activities for a mobile device are characterized by a mobility management finite state machine exercised in both the mobile device and network apparatus. There are three states in the machine: idle state, standby state and ready state. Both the mobile device and network apparatus employ a ready counter, which counts the number of cells crossed by the mobile device in the packet idle period between two packet transmissions. If the counted number reaches a threshold, the mobility management state switches from the ready state to standby state.

Abstract: This invention proposes a mobility management method and system for wireless data networks, such as GPRS and UMTS systems. The wireless data network consists of at least one mobile device and one network apparatus. The cells in a wireless data network are partitioned into several routing areas. In the wireless data network, the mobility management activities for a mobile device are characterized by a mobility management finite state machine exercised in both the mobile device and network apparatus. There are three states in the machine: idle state, standby state and ready state. Both the mobile device and network apparatus employ a ready counter, which counts the number of cells crossed by the mobile device in the packet idle period between two packet transmissions. If the counted number reaches a threshold, the mobility management state switches from the ready state to standby state.