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

A protocol for supporting mobile end systems (ESs) that move within an area in a connectionless-mode network protocol (CLNP) environment is proposed. Traffic caused by control protocol data units under frequent ES migration can be reduced by separating the roles of intermediate systems (ISs) into two roles: (1) generating and propagating the information of the default location of an ES, and (2) communicating directly to the ES and notifying the IS performing the role (1) of the current location 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 to 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, so it is easy to apply to the existing networks