Industrial Technology Research Institute

Shun-Ren Yang

Yi-Bing Lin

Ching-Wen Cheng

Yung-Chun Lin

Vincent Feng

Jia-Wei Wu

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 (LIPA), and a home LIPA network entity end (LIPA). The UE end successfully registers to a core network (CN) via the LIPA, thereby attaining mutual trust relationship between the UE end and the LIPA. The UE end successfully registers to the CN via the LIPA, thereby attaining mutual trust relationship between the UE end and the LIPA. The LIPArequests the UE end via the LIPAfor successfully re-authenticating the CN, thereby attaining mutual trust relationship between the LIPAand the LIPA.

Authentication method and apparatus for user equipment and LIPA network entities

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.

Growing community of inventors

Taichung, Taiwan

Shun-Ren Yang