Communication method and communication device using ambient backscatter communication

Patent metadata

Field	Value
Publication number	US-10911136-B2
Application number	US-201816203394-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Feb 12, 2018
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

Disclosed are a communication method and communication apparatus using an ambient backscatter communication. A transmission apparatus may include generating a plurality of bitsets by fragmenting data based on a predetermined bitset length, mapping the plurality of bitsets to a plurality of switching patterns based on a data size, and controlling a reflection of a background radio frequency (RF) signal based on a corresponding mapped switching pattern, a total number of the plurality of switching patterns may be determined based on the bitset length, and each of the plurality of switching patterns may have a different length.

First claim

What is claimed is:

1. A transmission method comprising:
generating a plurality of bitsets by fragmenting data to be transmitted based on a predetermined bitset length;
mapping the plurality of bitsets to a plurality of switching patterns based on a data size; and
controlling a reflection of a length of a carrier frame of a background radio frequency (RF) signal based on a corresponding mapped switching pattern,
wherein a total number of the plurality of switching patterns is determined based on the bitset length, and each of the plurality of switching patterns has a different length.

2. The transmission method of claim 1 , wherein the controlling of the reflection comprises reflecting the background RF signal by switching an RF switch based on the corresponding mapped switching pattern.

3. The transmission method of claim 1 , wherein the total number of the plurality of switching patterns is 2 n , and the n is the bitset length.

4. The transmission method of claim 1 , wherein the mapping of the plurality of bitsets to the plurality of switching patterns comprises:
mapping a first bitset among the plurality of bitsets to a first switching pattern; and
mapping a second bitset among the plurality of bitsets to a second switching pattern,
wherein each of the first switching pattern and the second switching pattern has a different length.

5. The transmission method of claim 1 , wherein a length of each of the plurality of switching patterns is determined according to the following equation:

l
k

=

k
*

T
n

where l k denotes a length of a k th switching pattern among the plurality of switching patterns, T denotes the length of the carrier frame of the background RF signal, and n denotes the total number of the plurality of switching patterns.

6. A transmission apparatus comprising:
a controller configured to generate a plurality of bitsets by fragmenting data to be transmitted based on a predetermined bitset length, map the plurality of bitsets to a plurality of switching patterns based on a data size, and control a reflection of a length of a carrier frame of a background radio frequency (RF) signal based on a corresponding mapped switching pattern; and
an RF switch configured to reflect the length of the carrier frame of the background RF signal under control of the controller,
wherein a total number of the plurality of switching patterns is determined based on the bitset length, and each of the plurality of switching patterns has a different length.

7. The transmission apparatus of claim 6 , wherein the background RF signal is configured as a wireless-fidelity (Wi-Fi) signal.

8. The transmission apparatus of claim 6 , wherein the total number of the plurality of switching patterns is 2 n , and the n is the bitset length.

9. The transmission apparatus of claim 6 , wherein the controller is configured to map a first bitset among the plurality of bitsets to a first switching pattern and map a second bitset among the plurality of bitsets to a second switching pattern, and each of the first switching pattern and the second switching pattern has a different length.

10. The transmission apparatus of claim 6 , wherein the controller is configured to determine a length of each of the plurality of switching patterns according to the following equation:

l
k

=

k
*

T
n

where l k denotes a length of a k th switching pattern among the plurality of switching patterns, T denotes the length of the carrier frame of the background RF signal, and n denotes the total number of the plurality of switching patterns.

Assignees

• Electronics & Telecommunications Res Inst
• Found Res & Business Seoul Nat Univ Sci & Tech

Inventors

• Jeong Byung Jang
• Byun Woo Jin
• Yun Ji-Hoon
• Lim Jae-Han
• Murti Wisnu

Classifications

• Y02D30/70

  in wireless communication networks · CPC title

• H04B5/45

  Transponders · CPC title

• H04B1/006

  using switches for selecting the desired band (H04B1/0057 takes precedence) · CPC title

• H04B7/22 Primary

  Scatter propagation systems {, e.g. ionospheric, tropospheric or meteor scatter} · CPC title

• H04B7/0805

  with single receiver and antenna switching (H04B7/0822 takes precedence) · CPC title