Abstract: Efficient use of an ATM transmission path becomes possible by multiplexing, into a bandwidth in the bandwidth-assured individual VP, a plurality of users whose traffic volumes are beyond a predetermined value. Installing a bandwidth-unassured common VP for low traffic users makes it possible to switch from the common VP to the individual VP or vice versa under the following conditions. (1) When the user traffic volume, monitored at fixed intervals during the communications through an individual VP, drops below a predetermined threshold value, the individual VP is switched to a common VP. (2) When the user traffic volume, monitored at fixed intervals during the communications through a common VP, exceeds a predetermined threshold value, the common VP is switched to an individual VP. (3) In addition to condition (2), when bandwidth shortage takes place in common VPs, the common VPs of heavy traffic users are switched to individual VPs.

Abstract: Control of a packet communications network in a fixed network used by a mobile communications network is performed. (1) A communication hold mode is set for a user when the traffic volume of the user's transmission or reception of a packet per fixed time period is less than a predetermined value. The communication hold mode is defined as “although the network resources are released once, a mobile station and a gateway center at an interface with an external network behave to the user side and the external side as though the communication hold mode were maintained”. (2) When the user in the communication hold mode restarts the transmission of a packet, the mobile station automatically carries out a recall processing without the intervention of the user, and re-establishes the communication up to the gateway carrier.