Wireless communication apparatus

• US 9,955,439 B2
• Filed: 01/12/2016
• Issued: 04/24/2018
• Est. Priority Date: 01/31/2011
• Status: Active Grant

• Current Assignee: International Semiconductor Group
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Adachi, Tomoko, Ban, Koichiro, Tandai, Tomoya, Kasami, Hideo
• Primary Examiner(s): Yuen, Kan
• Assistant Examiner(s): CHANG, RICHARD K
• Application Number:
  US14/993,680
• Publication Number:
  US 20160128002A1
• Time in Patent Office: 833 Days
• Field of Search: 370252, 370311
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A wireless communication apparatus supports at least a second wireless communication scheme between a first wireless communication scheme and the second wireless communication scheme. The first wireless communication scheme requires that a wireless medium is determined to be busy when a reception level is equal to or greater than a minimum reception sensitivity level of a physical scheme. The apparatus includes a first processing unit and a second processing unit. The first processing unit is configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme and set a value greater than the minimum reception sensitivity level of the physical scheme, for a carrier sense level, when the second wireless communication scheme is used. The second processing unit is configured to carry out carrier sense using the carrier sense level.

Claims

1. A wireless communication apparatus supporting a first wireless communication scheme and a second wireless communication scheme, the apparatus comprising:

a memory; and

processing circuitry configured to set a transmission power and a carrier sense level,

wherein;

the processing circuitry sets a second level greater than a first level for the carrier sense level when the second wireless communication scheme is used,

the processing circuitry sets a second power value smaller than a first power value for the transmission power when the second wireless communication scheme is used,

the first level and the first power value are used for the first wireless communication scheme,

the second power value is decided based on a receiving sensitivity required for a physical scheme selected by the second wireless communication scheme, and

a communication range for the second wireless communication scheme is narrower than a communication range for the first wireless communication scheme.

2. The apparatus according to claim 1, further comprising a frequency conversion circuit configured to carry out up-conversion and down-conversion.

3. The apparatus according to claim 1, further comprising an antenna configured to transmit and receive a wireless signal.

4. The apparatus according to claim 1, wherein the physical scheme corresponds to a modulation and coding scheme.

5. The apparatus according to claim 1, wherein the apparatus performs wireless communication conforming to an IEEE 802.11 standard.

6. A wireless communication apparatus supporting a first wireless communication scheme and a second wireless communication scheme, the apparatus comprising:

an antenna;

a transmitter configured to transmit a first frame; and

a receiver configured to receive a second frame,

wherein;

the receiver uses a second level greater than a first level for a carrier sense level when the second wireless communication scheme is used,

the transmitter uses a second power value smaller than a first power value for a transmission power when the second wireless communication scheme is used,

the first level and the first power value are used for the first wireless communication scheme,

the second power value is decided based on a receiving sensitivity required for a physical scheme selected by the second wireless communication scheme, and

a communication range for the second wireless communication scheme is narrower than a communication range for the first wireless communication scheme.

7. The apparatus according to claim 6, wherein the physical scheme corresponds to a modulation and coding scheme.

8. The apparatus according to claim 6, wherein the apparatus performs wireless communication conforming to an IEEE 802.11 standard.

9. A wireless communication method for a wireless communication apparatus comprising processing circuitry and supporting a first wireless communication scheme and a second wireless communication scheme, the method comprising:

setting, by the processing circuitry, a second level greater than a first level for a carrier sense level when the second wireless communication scheme is used, and

setting, by the processing circuitry, a second power value smaller than a first power value for a transmission power when the second wireless communication scheme is used,

wherein;

the first level and the first power value are used for the first wireless communication scheme,

the second power value is decided based on a receiving sensitivity required for a physical scheme selected by the second wireless communication scheme, and

a communication range for the second wireless communication scheme is narrower than a communication range for the first wireless communication scheme.

10. The method according to claim 9, wherein the physical scheme corresponds to a modulation and coding scheme.

11. The method according to claim 9, wherein wireless communication conforming to an IEEE 802.11 standard is performed.