# US 8,787,489 B2 · Wireless communication device

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- Number: US 8,787,489 B2
- Document ID: US8787489B2
- Status: Granted
- Kind: B2
- Application number: 13/390,884
- Filed: 2010-08-26
- Published: 2012-06-14
- Granted: 2014-07-22
- Earliest claimed: 2009-10-28
- Assignees: Panasonic Corporation
- Applicants: Yoshishige Yoshikawa
- Inventors: Yoshishige Yoshikawa
- Web page: https://patentgrep.com/patent/US8787489B2

## CPC

- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04B 15/04: the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04L 1/0007: {by modifying the frame length}
- H04L 1/0083: {Formatting with frames or packets; Protocol or part of protocol for error control}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1858: {Transmission or retransmission of more than one copy of acknowledgement message}
- H04L 1/189: {Transmission or retransmission of more than one copy of a message}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

A wireless communication device includes a transmission data generator which segments transmission data into a plurality of subslots and then generates a plurality of slots each including a predetermined number of subslots from among the plurality of subslots, and a transmitter which transmits the plurality of slots generated by the transmission data generator. The time length T1 of the subslots is equal to or smaller than an oscillator stopping time which is determined on the basis of a change in voltage of a commercial AC power supply.

## Claims

### Claim 1

A wireless communication device comprising:
a transmission data generator which segments transmission data into a plurality of subslots and then generates a plurality of slots, each of the plurality of slots including a predetermined number of subslots from among the plurality of subslots; and
a transmitter which transmits the plurality of slots generated by the transmission data generator,
wherein a time length T1 of each of the plurality of subslots is equal to or smaller than an oscillator stopping time of an oscillator which may emit unwanted radiation to an ambient environment including the wireless communication device and interfere with wireless communication of the wireless communication device and which is determined on the basis of a change in voltage of a commercial AC power supply,
Wherein a time length T2 of each of the plurality of slots is larger than the oscillator stopping time.

### Claim 2 (depends on 1)

The wireless communication device of claim 1,
wherein the time length T2 of each of the plurality of slots is T2=T0/2 (T0: a period of the commercial AC power supply).

### Claim 3 (depends on 1)

The wireless communication device of claim 1,
wherein the time length T2 of each of the plurality of slots is T2=T0/2+T1 (T0: a period of the commercial AC power supply).

### Claim 4 (depends on 1)

The wireless communication device of claim 1,
wherein the time length T2 of each of the plurality of slots is T2=T0/2−T1 (T0: a period of the commercial AC power supply).

### Claim 5 (depends on 1)

The wireless communication device of claim 1, further comprising:
a receiver which receives a response signal from an another wireless communication device,
wherein the transmission data generator provides a response standby time, for which a transmission operation is stopped, between the plurality of slots, and changes a content of a packet to be transmitted after the response standby in accordance with a content of the response signal received by the receiver for the response standby time.

### Claim 6 (depends on 5)

The wireless communication device of claim 5,
wherein the response standby time is T3≧T0/2 (T3: a length of the response standby time).