Low power radio frequency communication
First Claim
Patent Images
1. An apparatus for use in radio frequency (RF) tag sensor network in which RF tags communicate via backscatter, the apparatus comprising:
- an access point comprising;
a first antenna;
a first radio coupled to the first antenna;
a central processing unit (CPU) coupled to the first radio;
a network interface; and
a backscatter adapter coupled to the access point via a wired communication interface, the backscatter adapter comprising a backscatter radio and a second antenna coupled to the backscatter radio for use in communicating with an RF tag in the RF tag sensor network via backscatter, wherein the backscatter adapter comprises a demodulator coupled between the backscatter radio and the second antenna to receive a backscattered signal from the RF tag and demodulate the signal to obtain an Internet packet with a destination Internet protocol (IP) address that the backscatter adapter communicates via the wired communication interface to the access point to forward to a network via the network interface,wherein the access point operates the first antenna and first radio as a half-duplex system and the backscatter adapter operates as a full duplex system.
0 Assignments
0 Petitions
Accused Products
Abstract
A method, system and tag for low power radio frequency communication is described. In one embodiment, the RF tag comprises: an access point comprising: a first antenna; a first radio coupled to the first antenna; a central processing unit coupled to the first radio; a backscatter adapter coupled to the access point via a wired communication interface, the backscatter adapter comprising a backscatter radio and a second antenna coupled to the backscatter radio for use in communicating with an RF tag in the network via backscatter.
-
Citations
17 Claims
-
1. An apparatus for use in radio frequency (RF) tag sensor network in which RF tags communicate via backscatter, the apparatus comprising:
-
an access point comprising; a first antenna; a first radio coupled to the first antenna; a central processing unit (CPU) coupled to the first radio; a network interface; and a backscatter adapter coupled to the access point via a wired communication interface, the backscatter adapter comprising a backscatter radio and a second antenna coupled to the backscatter radio for use in communicating with an RF tag in the RF tag sensor network via backscatter, wherein the backscatter adapter comprises a demodulator coupled between the backscatter radio and the second antenna to receive a backscattered signal from the RF tag and demodulate the signal to obtain an Internet packet with a destination Internet protocol (IP) address that the backscatter adapter communicates via the wired communication interface to the access point to forward to a network via the network interface, wherein the access point operates the first antenna and first radio as a half-duplex system and the backscatter adapter operates as a full duplex system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus for use in a radio frequency (RF) tag sensor network in which RF tags communicate via backscatter, the apparatus comprising:
-
an access point comprising; a first antenna; a first radio coupled to the first antenna; a central processing unit (CPU) coupled to the first radio; a network interface; and a backscatter adapter coupled to the access point via a wired communication interface, the backscatter adapter comprising; a backscatter radio, a modulator coupled to the backscatter radio and operable to transmit energy and communication data from the access point to the RF tag, a demodulator coupled to the backscatter radio, and a second antenna coupled to the modulator for use in communicating with an RF tag in the RF tag sensor network via backscatter, wherein the backscatter adapter comprises a demodulator coupled between the backscatter radio and the second antenna to receive a backscattered signal from the RF tag and demodulate the signal to obtain an Internet packet with a destination Internet protocol (IP) address that the backscatter adapter communicates via the wired communication interface to the access point to forward to a network via the network interface, wherein the access point operates the first antenna and first radio as a half-duplex system and the backscatter adapter operates as a full duplex system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
Specification