Wireless communication device and non-transitory computer-readable medium

Patent metadata

Field	Value
Publication number	US-2016157285-A1
Application number	US-201514854686-A
Country	US
Kind code	A1
Filing date	Sep 15, 2015
Priority date	Nov 28, 2014
Publication date	Jun 2, 2016
Grant date	—

Abstract

A master terminal transmits sound waves that are a synchronization signal from a speaker to a slave terminal at random time intervals. Upon acquiring the sound waves that are the synchronization signal by microphone, the slave terminal promptly transmits a response signal through wireless communication to the master terminal. The master terminal receives the response signal and a terminal ID transmitted from the slave terminal. The master terminal receives the response signal multiple times and determines whether time intervals when synchronization signals were transmitted and time intervals when response signals were received match. When the synchronization signal time intervals and the response signal time intervals match, the master terminal recognizes the slave terminal that transmitted response signals at time intervals matching the synchronization signal time intervals as a wireless communication connection target. Slave terminals that transmitted response signals at time intervals not matching the synchronization signal time intervals are excluded from wireless communication connection targets.

First claim

What is claimed is:

1 . A wireless communication device, comprising:
a transmitter configured to transmit a synchronization signal multiple times; an receiver configured to receive response signals transmitted by another wireless communication device that has received the synchronization signal; and a processor configured to compare a time interval when the synchronization signal was sent and a time interval when the response signal was received, and recognize the other wireless communication device as a connection target based on the comparison results.

2 . The wireless communication device according to claim 1 , wherein the processor recognizes the other wireless communication device as a connection target when it is determined that the time interval when the synchronization signal was transmitted and the time interval when the response signal was received match.

3 . The wireless communication device according to claim 1 , wherein the transmitter transmits the synchronization signal by sound waves.

4 . The wireless communication device according to claim 1 , wherein the receiver receives the response signal that the other wireless communication device has transmitted by sound waves.

5 . The wireless communication device according to claim 1 , wherein the receiver receives the response signal by detecting vibrations transmitted from the other wireless communication device.

6 . The wireless communication device according to claim 1 , wherein the transmitter transmits the synchronization signal at random time intervals.

7 . The wireless communication device according to claim 1 , wherein the receiver randomly determines a response wait time and receives a response signal transmitted from the other wireless communication device during the interval from when the synchronization signal was transmitted until the response wait time has elapsed.

8 . The wireless communication device according to claim 1 , wherein the processor connects with the recognized other wireless communication device.

9 . The wireless communication device according to claims 1 , wherein:
the transmitter transmits a public key for encryption included in the synchronization signal; the receiver receives a response signal including a personal identification number encrypted by another wireless communication device using the public key; and the processor decrypts the personal identification number using a private key corresponding to the public key, and establishes a connection between the wireless communication device and the other wireless communication device recognized as the connection target, using the decrypted personal identification number.

10 . The wireless communication device according to claim 1 , wherein the transmitter and the receiver are communicators for accomplishing wireless communication.

11 . The wireless communication device according to claim 1 or claim 2 , wherein the processor comprises multiple processors.

12 . A non-transitory computer-readable medium for causing a computer to accomplish:
transmitting a synchronization signal multiple times; acquiring a response signal transmitted by a wireless communication device that received the synchronization signal; comparing a time interval when the synchronization signal was transmitted and a time interval when the response signal was received; and recognizing the wireless communication device as a connection target, based on results by the comparing.

Assignees

• Casio Computer Co Ltd

Inventors

• Tabata Yuji
• Tomida Takahiro

Classifications

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04W76/023 Primary

  Electricity · mapped topic

• H04W12/04 Primary

  Key management, e.g. using generic bootstrapping architecture [GBA] · CPC title

• H04W12/50

  Secure pairing of devices · CPC title

• H04W12/02

  Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII] · CPC title