RELAY DEVICE, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM

• US 20110194486A1
• Filed: 10/28/2009
• Published: 08/11/2011
• Est. Priority Date: 10/28/2008
• Status: Active Grant

• Current Assignee: ICOM Incorporated
• Original Assignee: ICOM Incorporated
• Inventors: Tanaka, Yoshiyuki, Fukuzawa, Shoji
• Granted Patent: US 8,654,700 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A frequency band of 12.5 kHz that two repeaters (2A), (2B) are allowed to utilize is divided into two frequency bands, divisional frequency bands of 6.25 kHz are allocated to respective repeaters (2A), (2B), the repeater (2A) which is one specific repeater suspends transmission of a signal at a certain time set beforehand, another repeater (2B) is instructed to suspend transmission of a signal, and after signal transmission at individual repeaters (2A), (2B) are suspended, the repeater (2A) transmits a defined CW-ID signal which is a call signal given to the whole two repeaters (2A), (2B).

Claims

1. A relay device constituting a relaying station that relays a communication between wireless terminal devices, the relay device comprising:

transmitting/receiving means which relays a communication between wireless terminal devices at a divisional bandwidth acquired by dividing a bandwidth of an allocated frequency utilized by the relay device into a predetermined number of divisional bandwidths;

frequency allocating means which allocates each of the divided frequency bandwidth to the transmitting/receiving means;

relaying-operation termination instructing means which instructs each transmitting/receiving means to terminate a relaying operation of a communication between the wireless terminal devices at a certain time set beforehand; and

information transmission instructing means which causes one specific transmitting/receiving means to transmit a defined signal that is unique identification information given to the relaying station after the relaying operation by each transmitting/receiving means is terminated.

2. The relay device according to claim 1, wherein the transmitting/receiving means comprises transmission frequency changing means which changes a transmission frequency from a center frequency of a bandwidth allocated to each transmitting/receiving means to a center of a bandwidth of an allocated frequency utilized by the relay device when the defined signal that is unique identification is transmitted.

3. The relay device according to claim 1, wherein the defined signal represents the given identification information by intermittent of a non-modulated continuous signal.

4. The relay device according to claim 1, wherein the defined signal represents the given identification information by audio.

5. The relay device according to claim 1, wherein when any one of the transmitting/receiving means is transmitting a signal at the certain time set beforehand, the relaying-operation termination instructing means instructs that transmitting/receiving means to suspend a signal transmission after the signal transmission completes.

6. A wireless communication method which causes a relay device constituting a relaying station to relay a communication between wireless terminal devices, the method comprising:

causing transmitting/receiving means to relay a communication between wireless terminal devices at a divisional bandwidth acquired by dividing a bandwidth of an allocated frequency utilized by the relay device into a predetermined number of divisional bandwidths;

allocating each of the divided frequency bandwidth;

instructing termination of a relaying operation of a communication between the wireless terminal devices at a certain time set beforehand; and

causing one specific transmitting/receiving means to transmit a defined signal that is unique identification information given to the relaying station after the relaying operation is terminated.

7. A wireless communication system causing a relay device constituting a relaying station to relay a communication between wireless terminal devices, the system comprising:

transmitting/receiving means which relays a communication between wireless terminal devices at a divisional bandwidth acquired by dividing a bandwidth of an allocated frequency utilized by the relay device into a predetermined number of divisional bandwidths;

frequency allocating means which allocates each of the divided frequency bandwidth to the transmitting/receiving means;

relaying-operation termination instructing means which instructs each transmitting/receiving means to terminate a relaying operation of a communication between the wireless terminal devices at a certain time set beforehand; and

information transmission instructing means which causes one specific transmitting/receiving means to transmit a defined signal that is unique identification information given to the relaying station after the relaying operation by each transmitting/receiving means is terminated.