Radio communication terminal and radio communication system

• US 8,160,041 B2
• Filed: 11/16/2009
• Issued: 04/17/2012
• Est. Priority Date: 03/09/2009
• Status: Expired due to Fees

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Nakashima, Jun
• Primary Examiner(s): Ly, Anh-Vu
• Application Number:
  US12/591,291
• Publication Number:
  US 20100226306A1
• Time in Patent Office: 883 Days
• Field of Search: None
• US Class Current: 370/338
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence

Abstract

A radio communication terminal and a radio communication system which can avoid an obstacle that is caused by a malicious wormhole while using a harmless wormhole. There are provided: a radio communication terminal in which a relay route about a certain node is stored as a backup route about the node and the backup route is changed and set as a relay route about the node in accordance with a detection of an obstacle caused by application data; and a radio communication system in which a sink node transmits a transfer destination change command in association with the change setting and a node which received the command sets a node of a transferring source of the command as a transfer destination node.

Claims

1. A radio communication terminal having a relay route setting part for setting a relay route of a transmission packet to one of nodes in a multihop communication network in accordance with a discrimination result which is obtained by a route searching process of said multihop communication network, a transmitting part for transmitting said transmission packet through said set relay route, a receiving part for receiving a reception packet through said multihop communication network, and an application data processing part for processing application data included in said reception packet, comprising:

a backup route storing part for storing said relay route as a backup route regarding said one node;

a route change setting part for obtaining said backup route from said backup route storing part from said relay route setting part in accordance with a detection of an obstacle by said application data processing part and changing and setting the obtained backup route as said relay route regarding said one node; and

a transfer destination change command generating part for generating a transfer destination change command indicating that a transfer destination node of the transfer packet due to said one node should be changed in accordance with the detection of the obstacle by said application data processing part and transmitting said transfer destination change command from said transmitting part to said one node after said relay route setting part has set said relay route.

2. A terminal according to claim 1, further comprising a route change detecting part for detecting the change setting of said relay route in accordance with the discrimination result of said route searching process by said relay route setting part,

and wherein said backup route storing part stores said relay route as a backup route of said one node before said relay route setting part performs said change setting in accordance with the detection by said route change detecting part.

3. A terminal according to claim 1, further comprising an input part for receiving a route recovery input,

and wherein said route change setting part further includes change setting means for having said relay route setting part change and set said backup route as said relay route regarding said one node in accordance with said route recovery input.

4. A terminal according to claim 1, further comprising:

a transfer destination setting part for setting one of a plurality of nodes in the multihop communication network as a transfer destination node of the packet; and

a transfer part for transferring said packet to said transfer destination node,

wherein said terminal further includes a transfer destination forced changing part for setting a node of a transferring source of a transfer destination change command as said transfer destination node from said transfer destination setting part in accordance with the transfer destination change command received through said multihop communication network.

6. A terminal according to claim 1, further comprising:

a relay destination setting part for setting one of a plurality of nodes in the multihop communication network as a relay destination node of the packet; and

a relay part for relaying said packet to said relay destination node,

and wherein said terminal further includes a relay destination forced changing part for having said relay part relay a transfer destination change command to a transmission destination node in accordance with said transfer destination change command transmitted to the transmission destination node as one of said nodes which arrived through said multihop communication network and having said relay destination setting part set a node of a transmitting source of said transfer destination change command as said relay destination node.

5. A radio communication system including a sink node for mutually transmitting and receiving packets through a multihop communication network and at least one normal node, wherein said sink node comprises:

a relay route setting part for setting a relay route of a transmission packet to said one normal node in accordance with a discrimination result which is obtained by a route searching process of said multihop communication network;

a transmitting part for transmitting said transmission packet through said set relay route;

a receiving part for receiving a reception packet through said multihop communication network;

an application data processing part for processing application data included in said reception packet;

a backup route storing part for storing said relay route as a backup route regarding said one normal node;

a route change setting part for having said relay route setting part change and set said backup route as a relay route regarding said one normal node in accordance with a detection of an obstacle caused due to said application data by said application data processing part; and

a transfer destination change command generating part for generating a transfer destination change command indicating that a transfer destination node of a transfer packet due to said one normal node should be changed in accordance with said detection and having said transmitting part transmit said transfer destination change command to said one normal node after said relay route setting part has set said relay route,

and said normal node comprises;

a transfer destination setting part for setting one of a plurality of nodes in said multihop communication network as a transfer destination node of the transfer packet;

a transfer part for transferring said transfer packet to said transfer destination node; and

a transfer destination forced changing part for having said transfer destination setting part set a node of a transmitting source of said transfer destination change command as said transfer destination node in accordance with said transfer destination change command.

7. A radio communication system in which a sink node and a normal node mutually transmit and receive packets through at least one relay node in a multihop communication network,

wherein said sink node comprises:

a relay route setting part for setting a relay route of a transmission packet to said normal node in accordance with a discrimination result which is obtained by a route searching process of said multihop communication network;

a transmitting part for transmitting said transmission packet through said set relay route;

a receiving part for receiving a reception packet through said multihop communication network;

an application data processing part for processing application data included in said reception packet;

a backup route storing part for storing said relay route as a backup route regarding said normal node;

a route change setting part for having said relay route setting part obtain said backup route from said backup route storing part in accordance with a detection of an obstacle caused due to said application data by said application data processing part and change and set the obtained backup route as the relay route regarding said normal node; and

a transfer destination change command generating part for generating a transfer destination change command indicating that a transfer destination node of a transfer packet due to said normal node should be changed in accordance with said detection and having said transmitting part transmit said transfer destination change command to said normal node after said relay route setting part has set said relay route,

said relay node comprises;

a relay destination setting part for setting one of a plurality of nodes in said multihop communication network as a relay destination node of the relay packet;

a relay part for relaying said relay packet to said relay destination node; and

a relay destination forced changing part for relaying said transfer destination change command to said normal node by said relay part in accordance with said transfer destination change command transmitted to said normal node which arrived through said multihop communication network and having said relay destination setting part set a node of a transmitting source of said transfer destination change command as said relay destination node, and

said normal node comprises;

a transfer destination setting part for setting one of a plurality of nodes in said multihop communication network as a transfer destination node of the transfer packet;

a transfer part for transferring said transfer packet to said transfer destination node; and

a transfer destination forced changing part for having said transfer destination setting part set the node of the transmitting source of said transfer destination change command as said transfer destination node in accordance with said transfer destination change command.