Radio communication system, radio communication method, and recording medium for storing a program for selection of a repeater in radio communication system

• US 20010014586A1
• Filed: 02/12/2001
• Published: 08/16/2001
• Est. Priority Date: 02/14/2000
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Nakatsugawa, Yoshinori
• Granted Patent: US 6,714,762 B2
• Time in Patent Office: Days
• US Class Current: 455/13.1
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04W 40/00 Communication routing or communication path finding
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A radio communication system of this invention includes: terminals for sending a connection request through broadcast, detecting a reception condition when a connection request echo sent back is received as a terminal reception condition and sending it through broadcast; plural repeaters for detecting a reception condition when the connection request is received as a repeater reception condition, sending a connection request echo including this repeater reception condition and sending back a terminal reception condition echo to a master repeater when it receives a terminal reception condition; and a master repeater for when receiving the connection request echo and terminal reception condition, selecting a repeater securing an optimum communication state based on the repeater reception condition and terminal reception condition.

Claims

1. A radio communication system for a terminal to carry out radio communication through a repeater securing an optimum communication state selected from plural repeaters, wherein

a reception condition of a repeater when each of plural repeaters receives a connection request sent from the terminal through broadcast is detected as a repeater reception condition and a reception condition of a terminal when said terminal receives a connection request echo sent from said plural repeaters after receiving said connection request is detected as a terminal reception condition so as to select a repeater securing an optimum communication state based on said terminal reception condition and said repeater reception condition.

2. A radio communication system for a terminal to carry out radio communication through a repeater securing an optimum communication state selected by a path management repeater from plural repeaters, the system comprising:

a terminal for sending a connection request for starting radio communication through broadcast, receiving a connection request echo sent back by a repeater receiving said connection request so as to detect a reception condition at this time as a terminal reception condition and sending the terminal reception condition through broadcast;

plural repeaters for receiving said connection request sent by said terminal so as to detect a reception condition at this time as a repeater reception condition, sending said connection request echo including the repeater reception condition to said terminal and said path management repeater and when receiving said terminal reception condition sent by said terminal, sending the terminal reception condition to said path management repeater; and

a path management repeater for receiving said connection request sent by said terminal so as to detect a reception condition at this time as a repeater reception condition, sending said connection request echo including the repeater reception condition to said terminal and when receiving said connection request echo sent by said plural repeaters and said terminal reception condition sent by said terminal or said plural repeaters, selecting a repeater securing an optimum communication state based on said repeater reception condition and said terminal reception condition.

3. A radio communication system for a terminal to carry out radio communication through a repeater securing an optimum communication state selected from plural repeaters, the system comprising:

a terminal for sending a connection request for starting radio communication through broadcast, receiving a connection request echo sent back by a repeater receiving said connection request so as to detect a reception condition at this time as a terminal reception condition and selecting a repeater securing an optimum communication state based on the terminal reception condition and a repeater reception condition included in said connection request echo; and

plural repeaters for receiving said connection request sent by said terminal so as to detect a reception condition at this time as the repeater reception condition and sending said connection request echo including the repeater reception condition to said terminal.

4. A radio communication method for a terminal to carry out radio communication through a repeater securing an optimum communication state selected by a path management repeater from plural repeaters, the method comprising:

a connection request sending step of said terminal'"'"'s sending a connection request for starting radio communication through broadcast;

a repeater reception condition detecting step of when said connection request sent in said connection request sending step is received by said plural repeaters and said path management repeater, detecting a reception condition at this time as a repeater reception condition;

a connection request echo sending step of sending a connection request echo including said repeater reception condition detected in the repeater reception condition detecting step to said terminal and said path management repeater;

a terminal reception condition detecting step of when said terminal receives said connection request echo sent in the connection request echo sending step, detecting a reception condition at this time as a terminal reception condition;

a terminal reception condition sending step of sending said terminal reception condition detected in the terminal reception condition detecting step through broadcast;

a terminal reception condition echo sending step of when said plural repeaters receive said terminal reception condition sent in the terminal reception condition sending step, sending back the terminal reception condition to said path management repeater; and

a repeater selection step of when said path management repeater receives said terminal reception condition sent in the terminal reception condition echo sending step or the terminal reception condition sending step and further receives said connection request echo sent back in the connection request echo sending step, selecting a repeater securing an optimum communication state based on said terminal reception condition and said repeater reception condition.

5. A radio communication method for a terminal to carry out radio communication through a repeater securing an optimum communication state selected from plural repeaters, the method comprising:

a connection request sending step of said terminal'"'"'s sending a connection request for starting radio communication through broadcast;

a repeater reception condition detecting step of when said connection request sent in said connection request sending step is received by said plural repeaters, detecting a reception condition at this time as a repeater reception condition;

a connection request echo sending step of sending a connection request echo including said repeater reception condition detected in the repeater reception condition detecting step to said terminal;

a terminal reception condition detecting step of when said terminal receives said connection request echo sent in the connection request echo sending step, detecting a reception condition at this time as a terminal reception condition; and

a repeater selection step of selecting a repeater securing an optimum communication state based on said terminal reception condition detected in the terminal reception condition detecting step and said repeater reception condition included in said connection request echo.

6. A recording medium for storing a program for selection of a repeater in radio communication system for a terminal to carry out radio communication through a repeater securing an optimum communication state selected by a path management repeater from plural repeaters, the program including:

a connection sending request processing for said terminal'"'"'s sending a connection request for starting radio communication through broadcast;

a repeater reception condition detecting processing for, when said connection request sent in said connection request sending processing is received by said plural repeaters and said path management repeater, detecting a reception condition at this time as a repeater reception condition;

a connection request echo sending processing for sending a connection request echo including said repeater reception condition detected in the repeater reception condition detecting processing to said terminal and said path management repeater;

a terminal reception condition detecting processing for, when said terminal receives said connection request echo sent in the connection request echo sending processing, detecting a reception condition at this time as a terminal reception condition;

a terminal reception condition sending processing for sending said terminal reception condition detected in the terminal reception condition detecting processing through broadcast;

a terminal reception condition echo sending processing for, when said plural repeaters receive said terminal reception condition sent in the terminal reception condition sending processing, sending back the terminal reception condition to said path management repeater; and

a repeater selection processing for, when said path management repeater receives said terminal reception condition sent in the terminal reception condition echo sending processing or the terminal reception condition sending processing and further receives said connection request echo sent back in the connection request echo sending processing, selecting a repeater securing an optimum communication state based on said terminal reception condition and said repeater reception condition.

7. A recording medium for storing a program for selection of a repeater in radio communication system for a terminal to carry out radio communication through a repeater securing an optimum communication state selected from plural repeaters, the program including:

a connection request sending processing for said terminal'"'"'s sending a connection request for starting radio communication through broadcast;

a repeater reception condition detecting processing for, when said connection request sent in said connection request sending processing is received by said plural repeaters, detecting a reception condition at this time as a repeater reception condition;

a connection request echo sending processing for sending a connection request echo including said repeater reception condition detected in the repeater reception condition detecting processing to said terminal;

a terminal reception condition detecting processing for, when said terminal receives said connection request echo sent in the connection request echo sending processing, detecting a reception condition at this time as a terminal reception condition; and

a repeater selection processing for selecting a repeater securing an optimum communication state based on said terminal reception condition detected in the terminal reception condition detecting processing and said repeater reception condition included in said connection request echo.