A CLNP-based protocol for mobile end systems within an area

Abstract

In this paper, we propose a protocol for supporting mobile End Systems (ESs) ihat move within an area in ConnectionLess-mode Network Protocol (CLNP) environment. Trafic caused by control Protocol Data Units (PDUs) under fiequeni ES migration can be reduced by separating the roles of Intermediate Systems (ISs); 1) generating and propagating the information ofthe default location of an ES, 2) communicating directly to the ES and notifying the IS performing the role 1) of the current loctztion of the ES. In addition, ISs may use a new caching mechanism for efficiency. This protocol has the following advantages: First, there is no need for mobile ESs t o be changed. Second, ISs implementing this protocol can coexist with the conventional ISs. Third, it does not require any change to the areas which do not have mobile ESs, hence it is easy to apply it to the existing networks.

Location management of mobile hosts by grouping routers

“…In [12], a location management method based on the IS-IS protocol has been proposed. This method divides the set of routers in a fixed network into several static groups.…”

Strategies for Query Processing in Mobile Computing

“…In OSI network environments, the existing routing protocol, i.e., the IS-IS protocol [13], can deal with host migration within an area. Furthermore, several protocols for inter-area migration have been proposed by Carlberg [4] and Tsukamoto and Tanaka [20], and an effective protocol for intra-area migration has been also proposed by Tanaka and Tsukamoto [18].…”

“…A substantial amount of research has already been conducted on how to support mobile communications in existing network environments (see, e.g., [4], [8], [17], [18], [19], [20], and [22]). These approaches were directed at the realization of low cost location management of mobile hosts.…”

Recovery protocol for mobile checkpointing

“…and S j is a current MSS of M i . The stations exchange messages by using the mobile communication protocol [14,18,19]. That is, each stations can communicate with the others without being conscious of the locations of the stations.…”

“…The network addresses of the mobile stations are automatically assigned by using DHCP (Dynamic Host Conguration Protocol) [7]. The connections with the mobile stations can be automatically maintained by the mobile protocols [14,18,19] even if the mobile stations move among the cells. The mobile stations sometimes move out of the cells and do not have so much capacity of battery that the communication with the other stations can be continued for a long period.…”