WIRELESS COMMUNICATION SYSTEM, WIRELESS RELAY APPARATUS, AND DATA RECEIVING METHOD FOR WIRELESS TERMINAL

• US 20160219491A1
• Filed: 12/09/2015
• Published: 07/28/2016
• Est. Priority Date: 01/28/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Higashinakagawa, Takashi, KAWAIDA, Yasuyuki, SAKURAI, Katsumi, TAKAHASHI, Yuji, IWAO, Tadashige
• Granted Patent: US 10,390,282 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/883 where the sensing device enters an active or inactive mode
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In a wireless communication system that includes a plurality of wireless terminals each of which has a first device type and transmits data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type and relays the data that is received in wireless communication with each wireless terminal to the destination, each of the plurality of wireless terminals detects a wireless frame, receives data contained in the wireless frame when the detected wireless frame contains information that represents the first device type, and avoids receiving data contained in the wireless frame when the detected wireless frame contains information that represents the second device type.

Claims

1. A wireless communication system, comprising:

a plurality of sensors each of which belongs to a first device type;

a relay apparatus belonging to a second device type, the relay apparatus being capable of wireless communication with the plurality of sensors; and

a communication apparatus belonging to a third device type, the communication apparatus being capable of wireless communication with the relay apparatus,

each of the plurality of sensors comprising a wireless processing unit,

the wireless processing unit being configured to perform a process of generating and transmitting a wireless signal containing data to which identification information corresponding to a device type of a device being a destination is added when wireless transmission is performed,

the wireless processing unit being configured to perform a process of passing data obtained by wireless processing to an upper processing unit when wireless reception is performed and identification information corresponding to the first device type is added, and

the wireless processing unit being configured to perform a process of not passing the data obtained by the wireless processing to the upper processing unit when the wireless reception is performed and information corresponding to the second or third device type is added, and

the relay apparatus comprising a wireless processing unit configured to provide data contained in a received wireless signal to the upper processing device when the received wireless signal contains identification information corresponding to the second device type.

2. The wireless communication system according to claim 1, wherein when a specific sensor among the plurality of sensors performs wireless transmission to the relay apparatus, the specific sensor transmits a wireless signal that an address of the relay apparatus is set as a destination address of the wireless signal, and an address of the specific sensor being a source is set as a source address of the wireless signal, the wireless signal including data containing identification information that corresponds to a device type of the plurality of sensors and being added identification information that corresponds to a device type of the relay apparatus, and

wherein the wireless processing unit of the relay apparatus passes the data contained in the received wireless signal to an upper processing unit in response to detection of the identification information corresponding to the device type of the relay apparatus added, and when data that is addressed to the specific sensor is provided from the upper processing unit, the wireless processing unit adds to the provided data the identification information corresponding to the device type of the plurality of sensors, the identification information being contained in the data that is contained in the received wireless signal, and wirelessly transmits the provided data having the identification information.

3. The wireless communication system according to claim 2, wherein the destination address, the source address, the identification information corresponding to the device type of the plurality of sensors, and the information corresponding to the device type of the relay apparatus are transmitted for every transmission of a wireless signal.

4. A wireless communication system, comprising:

a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination; and

a plurality of wireless relays each of which has a second device type different from the first device type, the plurality of wireless relays each relaying the data that is received in wireless communication with each wireless terminal, to the destination,

wherein each of the plurality of wireless terminals comprises a wireless device configured to detect a wireless frame, and a processing device configured to process data contained in the wireless frame detected by the wireless device, and

when the detected wireless frame contains information that represents the first device type, the wireless device receives data contained in the wireless frame and provides the data to the processing device, and when the detected wireless frame contains information that represents the second device type, the wireless device avoids receiving the data contained in the wireless frame.

5. A wireless communication system, comprising:

a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination; and

a plurality of wireless relays each of which has a second device type different from the first device type, the plurality of wireless relays each relaying the data that is received from each wireless terminal, to the destination,

wherein each of the plurality of wireless relays comprises a wireless device configured to detect a wireless frame, and a processing device configured to process data contained in the wireless frame detected by the wireless device, and

when the detected wireless frame contains information that represents the second device type, the wireless device receives data contained in the wireless frame and provides the data to the processing device, and when the detected wireless frame contains information that represents the first device type, the wireless device avoids receiving the data contained in the wireless frame.

6. A wireless terminal operable as one of a plurality of wireless terminals in a wireless communication system that includes the plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type different from the first device type, the plurality of wireless relay apparatuses each relaying the data that is received from each wireless terminal, to the destination, the wireless terminal comprising:

a wireless device configured to detect a wireless frame; and

a processing device configured to process data contained in the wireless frame that is detected by the wireless device,

wherein when the detected wireless frame contains information that represents the first device type, the wireless device receives data contained in the wireless frame and provides the data to the processing device, and when the detected wireless frame contains information that represents the second device type, the wireless device avoids receiving the data contained in the wireless frame.

7. A wireless relay apparatus operable as one of a plurality of wireless relay apparatuses in a wireless communication system that includes a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and the plurality of wireless relay apparatuses each of which has a second device type different from the first device type, the plurality of wireless relay apparatuses each relaying the data that is received from each wireless terminal, to the destination, the wireless relay apparatus comprising:

a wireless device configured to detect a wireless frame; and

a processing device configured to process data contained in the wireless frame that is detected by the wireless device,

wherein when the detected wireless frame contains information that represents the second device type, the wireless device receives data contained in the wireless frame and provides the data to the processing device, and when the detected wireless frame contains information that represents the first device type, the wireless device avoids receiving the data contained in the wireless frame.

8. A data receiving method for a wireless terminal in a wireless communication system that includes a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type different from the first device type, the plurality of wireless relay apparatuses each relaying the data that is received from each wireless terminal, to the destination, the data receiving method comprising:

sensing a wireless frame;

receiving, when the detected wireless frame contains information that represents the first device type, data contained in the wireless frame; and

avoiding, when the detected wireless frame contains information that represents the second device type, receiving data contained in the wireless frame.

9. A data receiving method for a wireless relay in a wireless communication system that includes a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type different from the first device type, the plurality of wireless relay apparatuses each relaying the data that is received from each wireless terminal, to the destination, the data receiving method comprising:

sensing a wireless frame;

receiving, when the detected wireless frame contains information that represents the second device type, data contained in the wireless frame; and

avoiding, when the detected wireless frame contains information that represents the first device type, receiving data contained in the wireless frame.

10. A non-transitory computer-readable recording medium having stored therein a program for causing a computer, which is included in each of a plurality of wireless terminals in a communication system including the plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and a plurality of wireless relays each of which has a second device type different from the first device type, the plurality of wireless relays each relaying the data that is received from each wireless terminal, to the destination, the program for causing the computer to execute a process comprising:

detecting a wireless frame;

receiving, when the wireless frame detected by the wireless terminal including the computer contains information that represents the first device type, data contained in the wireless frame; and

avoiding, when the detected wireless frame contains information that represents the second device type, receiving data contained in the wireless frame.

11. A non-transitory computer-readable recording medium having stored therein a program for causing a computer, which is included in each of a plurality of wireless relays in a communication system including a plurality of wireless terminals each of which has a first device type, the plurality of wireless terminals each transmitting data to a destination, and the plurality of wireless relays each of which has a second device type different from the first device type, the plurality of wireless relays each relaying the data that is received from each wireless terminal, to the destination, the program for causing the computer to execute a process comprising:

detecting a wireless frame;

receiving, when the detected wireless frame contains information that represents the second device type, data contained in the wireless frame; and

avoiding, when the detected wireless frame contains information that represents the first device type, receiving data contained in the wireless frame.