Other

Telefonaktiebolaget Lm Ericsson (publ)

S.o.i. Tec Silicon on Insulator Technologies, S.a.

Canon Kabushiki Kaisha

Ntt Docomo, Inc.

Atsushi Iwasaki

Yasuhiro Shimura

Bruno Ghyselen

Akira Kato

Katsutoshi Nishida

Shinichi Isobe

Csaba Keszei

Zoltan Richard Turanyi

Andras Valko

There are provided a scalable method for mobility management applied to an IP-based network system including a plurality of routers and a plurality of servers, a part of which serve as a home routing manager (HRM), a part of which serve as local routing managers (LRM) for individual mobile nodes. The method at least comprises the steps of sending a first query about a routing address of a destination mobile node toward the HRM, based on an activation notification (AN) from an ingress access router (AR) of the plurality of routers, triggered by a source mobile mode, from an LRM receiving the activation notification; relaying the first query via one or more intermediate routing managers (IRM) closer to the HRM until the first query reaches the HRM; and in response to the first query, sending the routing address of the destination mobile node back to the ingress access router through the relay path from the HRM.

Routing manager hierarchy

There are provided a method, a network system, and a router capable of decreasing the chance of VRM or VLM changes so as to reduce signaling, and consequently contributing to better scalability. The method is applied to mobility management used in an IP-based network system, which contains a plurality of access routers (AR), location managers (LM) and routing managers (RM), through which a mobile node (MN) transmits and receives information. According to the method, a visited routing manager (VRM) where the MN is currently located monitors the MN, an AR currently communicating with the MN discriminates whether or not the MN is moving out of its connectivity range, and the VRM discriminates whether or not the MN is moving out of its control range. Then, the method switches mobility management over from the current AR to a new AR in accordance with the discrimination results, and switches mobility management over from the current VRM to a new VRM in accordance with the discrimination result.

VRM selection

The invention concerns a method for making substrates, in particular for optics, electronics or optoelectronics. The method includes an operation which consists in implanting () atomic species beneath the surface of a material in the form of a cylindrical ingot (), at a depth of implantation distributed about a certain value by bombardment of the atomic species on a zone of the ingot () cylindrical surface, and an operation which consists in removing (), at a separation depth located proximate to the depth of implantation, the layer () of material located between the surface and the separation depth, to remove the layer () from the rest of the cylindrical ingot ().

Method and device for making substrates

Growing community of inventors

Tokyo, Japan

Atsushi Iwasaki