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Document Type and Number:
Japanese Patent JP4237134
Kind Code:

To provide a network system which can reduce power consumption, effectively utilize frequencies, and is applicable to even mobile objects.

Each of wireless terminals 101 includes a terminal address storage means for storing a terminal address of a predetermined transmission destination, in the case of transmitting a message from a wireless terminal to another terminal, when receiving a wireless frame from the wireless terminal, GW nodes 102 to 105 access the terminal address storage means, particularize the terminal address of the transmission destination of the message by each wireless terminal, transmit the message to the terminal of the particularized transmission destination via an Internet GW 113, and in the case of transmitting the message from the terminal to the wireless terminal, the Internet GW 113 accesses a positional information storage device, acquires positional information of the wireless terminal on the basis of the ID of the wireless terminal, transfers the message to the corresponding GW node on the basis of the acquired positional information, and the GW node transfers the message to the wireless terminal.


Hiroshi Saito
Masahiro Umehira
Masahiro Morikura
Application Number:
Publication Date:
March 11, 2009
Filing Date:
December 08, 2004
Export Citation:
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Nippon Telegraph and Telephone Corporation
International Classes:
H04W84/00; H04L12/28; H04W28/00; H04W60/00
Other References:
R. C. Chalmers and K. C. Almeroth,A mobility gateway for small-device networks,Pervasive Computing and Communications, 2004. PerCom 2004. Proceedings of the Second IEEE Annual Conference on,2004年 3月,pp.209-218
Attorney, Agent or Firm:
Masatake Shiga
Yasuhiko Murayama