Mobile node, a control method thereof, and a mobile node control program

Abstract

A mobile node having two or more interfaces, a control method of the mobile node, and a mobile node control program are disclosed. The mobile node includes a generating unit to generate control information for each interface, an information providing unit for providing the control information provided by each interface to an upper layer, and a routing controlling unit to perform at least one of determining connectivity, and updating a routing based on the provided control information.

1 . A mobile node equipped with a plurality of interfaces, comprising:
 a generating unit configured to generate control information for each of said interfaces;   an information providing unit configured to provide said control information reported from each of said interfaces to an upper layer; and   a routing controlling unit configured to perform at least one of determining connectivity of an accessing interface selected among said interfaces to the upper layer and updating a routing, based on the control information.   
   
   
       2 . The mobile node as claimed in  claim 1 , further comprising:
 an information exchanging unit configured to exchange said control information with each of said interfaces;   an extracting unit configured to extract attribute information of said interfaces from said control information; and   a storage unit configured to store said attribute information.   
   
   
       3 . The mobile node as claimed in  claim 1 , wherein:
 said generating unit generates said control information based on a communication state provided by at least one of the upper layer and a lower layer, which layers are in a protocol stack of said mobile node.   
   
   
       4 . The mobile node as claimed in  claim 2 , further comprising:
 a selecting unit configured to select one of the interfaces that has an attribute that satisfies predetermined conditions,   wherein said selecting unit is configured to select one of the interfaces based on a preference that defines connection priority of said interfaces.   
   
   
       5 . The mobile node as claimed in  claim 4 , wherein:
 said selecting unit directs interfaces other than the selected interface to turn off functions.   
   
   
       6 . The mobile node as claimed in  claim 4 , wherein:
 said selecting unit, when selecting a new one of the interfaces different from a currently operating one of the interfaces, enables the currently operating interface to receive, and enables the newly selected interface to send and receive.   
   
   
       7 . The mobile node as claimed in  claim 1 , wherein:
 said generating unit periodically generates the control information at a predetermined interval.   
   
   
       8 . The mobile node as claimed in  claim 4 , wherein:
 said selecting unit selects one of the interfaces based on the priorities of said interfaces.   
   
   
       9 . The mobile node as claimed in  claim 4 , wherein:
 said selecting unit selects one of the interfaces based on data packets received via said interfaces.   
   
   
       10 . The mobile node as claimed in  claim 1 , wherein:
 said routing controlling unit performs at least one of determining connectivity, and updating a route by causing one of the interfaces in use to switch to a connection state.   
   
   
       11 . A method of communication via a mobile node equipped with a plurality of interfaces, comprising:
 generating control information for each of said interfaces;   providing said control information reported from each of said interfaces to an upper layer; and   at least one of determining connectivity of an accessing interface selected among said interfaces to the upper layer and updating a routing, based on the control information.   
   
   
       12 . The control method of the mobile node as claimed in  claim 11 , further comprising:
 exchanging said control information with each of said interfaces;   extracting attribute information of said interfaces from said control information; and   storing said attribute information.