APPARATUS AND METHOD FOR CONTROLLING TRANSMITTING POWER OF WIRELESS DEVICE

• US 20140179247A1
• Filed: 12/26/2013
• Published: 06/26/2014
• Est. Priority Date: 12/26/2012
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHO, Sang In, KANG, Kyu Min, PARK, Jae Cheol, JEONG, Byung Jang
• Application Number:
  US14/140,595
• Publication Number:
  US 20140179247A1
• Time in Patent Office: Days
• US Class Current: 455/113
• CPC Class Codes: H04B 1/0067 with one or more circuit blocks in common for different bands
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04H 20/61 for local area broadcast, e.g. instore broadcast
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04W 52/242 taking into account path loss

Abstract

Provided is an apparatus and method for controlling a transmission output of a radio device using a television (TV) band based on a frequency band, the apparatus including a frequency band selecting unit to select frequency bands to be compared, a radio wave attenuation calculation unit to calculate a radio wave attenuation for each of the selected frequency bands, and a transmission output control unit to automatically control the transmission output of the radio device using a TV band based on a difference value among the calculated attenuation values. According to an example embodiment, it is possible to extend a service area while sufficiently protecting a service being provided in the TV band, thereby realizing an efficient use of frequency resources.

Claims

1. An apparatus for controlling a transmission output of a radio device, the apparatus comprising:

a frequency band selecting unit to select frequency bands to be compared;

a radio wave attenuation calculation unit to calculate a radio wave attenuation for each of the selected frequency bands; and

a transmission output control unit to automatically control the transmission output of the radio device using a television (TV) band based on a difference value among the calculated attenuation values.

2. The apparatus of claim 1, wherein the frequency band selecting unit selects, from a TV white space, the frequency bands to be compared.

3. The apparatus of claim 2, wherein the frequency band selecting unit selects one of the frequency bands to be compared, to be a reference frequency band, and selects the reference frequency band from a very high frequency (VHF) band or an ultra high frequency (UHF) band.

4. The apparatus of claim 3, wherein the frequency band selecting unit uses a VHF band in a frequency range between 54 megahertz (MHz) and 300 MHz to be the VHF band, and uses a UHF band in a frequency range between 300 MHz and 698 MHz to be the UHF band.

5. The apparatus of claim 3, wherein when the frequency band selecting unit selects the reference frequency band from the VHF band, the frequency band selecting unit selects the lowest frequency band of the VHF band to be the reference frequency band, and when the frequency band selecting unit selects the reference frequency band from the UHF band, the frequency band selecting unit selects the highest frequency band of the UHF band to be the reference band.

6. The apparatus of claim 1, wherein the radio wave attenuation calculation unit calculates a radio wave attenuation in a free space as the radio wave attenuation.

7. A method of controlling a transmission output of a radio device, the method comprising:

selecting frequency bands to be compared;

calculating a radio wave attenuation for each of the selected frequency bands; and

automatically controlling the transmission output of the radio device using a television (TV) band based on a difference value among the calculated radio wave attenuations.

8. The method of claim 7, wherein the selecting comprises selecting the frequency bands to be compared, from a TV white space.

9. The method of claim 8, wherein the selecting comprises selecting one of the frequency bands to be compared, to be a reference frequency band, and selecting the reference frequency band from a very high frequency (VHF) band or an ultra high frequency (UHF) band.

10. The method of claim 9, wherein the selecting comprises using a VHF band in a frequency range between 54 megahertz (MHz) and 300 MHz as the VHF band, and using a UHF band in a frequency range between 300 MHz and 698 MHz as the UHF band.

11. The method of claim 9, wherein the selecting comprises selecting, when the reference frequency band is selected from the VHF band, the lowest frequency band of the VHF band as the reference frequency band and selecting, when the reference frequency band is selected from the UHF band, the highest frequency band of the UHF band as the reference band.