Abstract: Disclosed is a technique for reducing delay when a mobile communication terminal starts communication and reducing consumption of a power resource of the mobile communication terminal. An MN (mobile node) (1012) has plural interfaces (IF-1 (1030) and IF-2 (1028)). One interface IF-1 is connected to a connection point (serving PoA (1008)). When switching over from communication using the IF-1 to communication using the IF-2, the MN transmits a paging request message via the IF-1 and the serving PoA to a connection point (target PoA (1010)) attempted to connect using the IF-2. The target PoA that has received the paging request message reduces a beacon transmission cycle and sets transmission slots for the MN so that the connection of the MN can be established efficiently.

Abstract: A technique is disclosed, according to which communication can be achieved with high efficiency by selecting access points to be connected based on the quality of end-to-end communication between a mobile node and a correspondent node when there are a plurality of access points. According to this technique, a mobile node 100 transmits to the access point a first message to request the selection of access points to be connected, and the access point, upon receipt of the first message, transmits a second message including specified information necessary for the selection of access points to be connected to a communication apparatus 108.

Abstract: Disclosed is a technique to provide a QoS resource reservation method and the like, which will not generate a delay in establishing a QoS reservation and can avoid the waste of QoS resources. According to the technique, the method includes: a step of causing a mobile node 110 to send, toward a corresponding node 100, a first message to collect information for making a QoS resource reservation; and a step in which, when the mobile node detects a handover thereof during QoS resource reservation processing, the mobile node sends a second message to a path from the mobile node before the handover to the corresponding node to remove the QoS resource reservation.

Abstract: Disclosed is a technique for reducing delay when a mobile communication terminal starts communication and reducing consumption of a power resource of the mobile communication terminal. An MN (mobile node) (1012) has plural interfaces (IF-1 (1030) and IF-2 (1028)). One interface IF-1 is connected to a connection point (serving PoA (1008)). When switching over from communication using the IF-1 to communication using the IF-2, the MN transmits a paging request message via the IF-1 and the serving PoA to a connection point (target PoA (1010)) attempted to connect using the IF-2. The target PoA that has received the paging request message reduces a beacon transmission cycle and sets transmission slots for the MN so that the connection of the MN can be established efficiently.