Wireless communication device and communication control method

• US 8,095,177 B2
• Filed: 12/26/2008
• Issued: 01/10/2012
• Est. Priority Date: 04/30/2008
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ida, Ichirou
• Primary Examiner(s): Williams, Howard
• Application Number:
  US12/344,322
• Publication Number:
  US 20090275293A1
• Time in Patent Office: 1,110 Days
• Field of Search: 455/41.1, 455/41.2, 455/552.1, 455/509, 455/510, 455/511, 455/512, 455/513
• US Class Current: 455/552.1
• CPC Class Codes: H04B 13/005 Transmission systems in which the medium consists of the human body

Abstract

A wireless communication device includes a first wireless unit a first wireless unit processing a first radio signal propagated through a space; a second wireless unit processing a second radio signal propagated along the surface of a human body or in the human body; and a control unit selecting, as a present radio signal, any one of the first radio signal and the second radio signal, and controlling the first wireless unit and the second wireless unit so as to process the present radio signal.

Claims

1. A wireless communication device comprising:

a first wireless unit configured to process a first radio signal propagated through a space;

a second wireless unit configured to process a second radio signal propagated along the surface of a human body or in the human body; and

a control unit configured to select, as a present radio signal, any one of the first radio signal and the second radio signal, and controlling the first wireless unit and the second wireless unit so as to process the present radio signal,

wherein the control unit retains priority information for specifying any one of the first radio signal and the second radio signal as a priority radio signal, switches over the present radio signal to the priority radio signal specified by the priority information at predetermined timing, and controls the first wireless unit and the second wireless unit so as to process a test signal.

2. The wireless communication device according to claim 1, wherein the control unit, after transmitting predetermined information by use of the present radio signal, if a reception acknowledgement signal of the predetermined information is not received, switches over the present radio signal to the other radio signal.

3. The wireless communication device according to claim 1, further comprising

an estimation unit configured to estimate a reception state of the present radio signal, wherein the control unit, if the reception state value acquired by the estimation unit declines under a threshold value, switches over the present radio signal to the other radio signal.

4. The wireless communication device according to claim 3, wherein the estimation unit estimates, as the reception state of the present radio signal, at least one of received power, a signal to interference power ratio and a signal to interference plus noise power ratio, and the control unit determines switchover of the present radio signal on the basis of at least one of the received power, the signal to interference power ratio and the signal to interference plus noise power ratio which are estimated by the estimation unit.

5. The wireless communication device according to claim 1, wherein the first wireless unit includes a frequency converting unit and an amplifying unit that are not included in the second wireless unit, and the control unit, when the second radio signal is selected as the present radio signal, stops supplying electric power to at least one of the frequency converting unit and the amplifying unit of the first wireless unit.

6. The wireless communication device according to claim 1, wherein the priority information specifies the first radio signal as the priority radio signal when a high transmission rate is requested, and specifies the second radio signal as the priority radio signal when low power consumption is requested.

7. A communication control method in a wireless communication device comprising a first wireless unit configured to process a first radio signal propagated through a space, and a second wireless unit configured to process a second radio signal propagated along the surface of a human body or in the human body, the method comprising:

selecting, as a present radio signal, any one of the first radio signal and the second radio signal; and

controlling the first wireless unit and the second wireless unit so as to process the selected present radio signal,

wherein the controlling includes retaining priority information for specifying any one of the first radio signal and the second radio signal as a priority radio signal, switching over the present radio signal to the priority radio signal specified by the priority information at predetermined timing, and controlling the first wireless unit and the second wireless unit so as to process a test signal.

8. The communication control method according to claim 7, wherein the controlling includes, after transmitting predetermined information by use of the present radio signal, if a reception acknowledgement signal of the predetermined information is not received, switching over the present radio signal to the other radio signal.

9. The communication control method according to claim 7, further comprising;

estimating a reception state of the present radio signal,

wherein the controlling includes, if the reception state value acquired in the estimating declines under a threshold value, switching over the present radio signal to the other radio signal.

10. The communication control method according to claim 9, wherein the estimating includes estimating, as the reception state of the present radio signal, at least one of received power, a signal to interference power ratio and a signal to interference plus noise power ratio, and the controlling includes determining switchover of the present radio signal on the basis of at least one of the received power, the signal to interference power ratio and the signal to interference plus noise power ratio which are estimated in the estimating.

11. The communication method according to claim 7, wherein the first wireless unit includes a frequency converting unit and an amplifying unit that are not included in the second wireless unit, and the controlling includes, when the second radio signal is selected as the present radio signal, stopping the supply of electric power to at least one of the frequency converting unit and the amplifying unit of the first wireless unit.

12. The communication control method according to claim 7, wherein the priority information specifies the first radio signal as the priority radio signal when a high transmission rate is requested, and specifies the second radio signal as the priority radio signal when low power consumption is requested.