Patent ID: 7590085

Claim:
A mobile-communications system, comprising: a mobile station; a wireless-base station enabled to communicate with the mobile station; and a location-information management apparatus for managing a state of the mobile station in a network layer upper to a link layer for managing wireless-communications resources; wherein said mobile station is provided with wireless-communications means for transmitting and receiving a signal with the wireless-base station in an active state in the link layer for managing the wireless-communications resources, discontinuous-receiving means for discontinuously receiving a control signal from said wireless-base station in the link layer in a state different from the active state, and first state-management means for creating a state-transition signal in response to a paging signal included in said control signal, wherein said location-information management apparatus is provided with second state-management means for managing whether the state of said mobile station in the network layer is active or idle, and area-management means for managing information regarding a cell to which the mobile station in the active state belongs and information regarding a location-registration area to which the mobile station in the idle state belongs, wherein a period in which the mobile station in the active state is neither transmitting nor receiving is measured in the link layer and in the network layer so that the state of said mobile station is changed to a state different from the active state when the period exceeds a predetermined period, wherein a signal destined for the mobile station in the state different from the active state in at least one of the network layer and the link layer is accumulated in said location-information management apparatus or said wireless-base station, and the signal destined for said mobile station is transmitted after the state of said mobile station is changed to the active state, or discontinuously transmitted to said mobile station with the paging signal of said mobile station created in said wireless-base station, and wherein management of state transition of the mobile station in the network layer and management of state transition of the mobile station in the link layer are performed independently.