Signal detection arrangement

• US 20070026818A1
• Filed: 07/29/2005
• Published: 02/01/2007
• Est. Priority Date: 07/29/2005
• Status: Abandoned Application

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Bekritsky, Benjamin, Willins, Bruce, Wang, Huayan
• Application Number:
  US11/193,665
• Publication Number:
  US 20070026818A1
• Time in Patent Office: Days
• US Class Current: 455/91
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

Described is an arrangement including a receiver and an enveloped detection arrangement. The receiver receives radio frequency signals generated according to a predetermined wireless communication protocol. The envelope detection arrangement screens the radio frequency signals for a predetermined signal which utilizes the predetermined wireless communication protocol and has a predetermined envelope sequence. Upon detection of the predetermined signal, the arrangement transmits a further signal to a computing device coupled thereto. The further signal is an instruction for the computing device to execute a predetermined action.

Claims

1. An arrangement, comprising:

a receiver receiving radio frequency signals generated according to a predetermined wireless communication protocol; and

an envelope detection arrangement screening the radio frequency signals for a predetermined signal utilizing the predetermined wireless communication protocol and having a predetermined envelope sequence,

wherein, upon detection of the predetermined signal, the arrangement transmits a further signal to a computing device coupled thereto, the further signal being an instruction for the computing device to execute a predetermined action.

2. The arrangement according to claim 1,- wherein the envelope detection arrangement is one of an AM demodulator and a signal strength indicator.

3. The arrangement according to claim 1, further comprising a power source.

4. The arrangement according to claim 3, wherein the power source is one of a battery and a solar cell.

5. The arrangement according to claim 1, wherein the computing device is one of an access point, an access port, a laptop, a cell phone, a PDA, a network interface card, a handheld computer, an image-based scanner, a laser-based scanner, an RFID reader and an RFID tag.

6. The arrangement according to claim 1, wherein the receiver utilizes at least one of (i) a predetermined sensitivity, (ii) a single channel, (iii) an predetermined demodulation scheme and (iv) a predetermined duty cycle.

7. The arrangement according to claim 1, wherein the predetermined action is a change from a first communication mode to a second communication mode.

8. The arrangement according to claim 7, wherein the computing device conducts communications only when in the second communication mode.

9. The arrangement according to claim 1, wherein the predetermined envelope sequence is one of (i) a predetermined sequence of packets, (ii) a predetermined signal strength and (iii) a pulse-width modulation sequence.

10. The arrangement according to claim 1, wherein the envelope detection arrangement utilizes a pulse code modulation technique to identify the predetermined signal.

11. The arrangement according to claim 1, wherein the predetermined wireless communication protocol is an IEEE 802.11 protocol.

12. A method, comprising:

receiving, by a receiver, radio frequency signals generated according to a predetermined wireless communication protocol;

screening, by an envelope detection arrangement coupled to the receiver, the radio frequency signals for a predetermined signal utilizing the predetermined wireless communication protocol and having a predetermined envelope sequence; and

when the arrangement detects the predetermined signal, transmitting, by the arrangement transmits, a further signal to a computing device coupled thereto, the further signal being an instruction for the computing device to execute a predetermined action.

13. The method according to claim 12, wherein the envelope detection arrangement is one of an AM demodulator and a signal strength indicator.

14. The method according to claim 12, wherein the predetermined wireless communication protocol is an IEEE 802.11 protocol.

15. The method according to claim 12, wherein the predetermined action is a change from a first communication mode to a second communication mode.

16. The method according to claim 15, wherein the computing device conducts communications only when in the second communication mode.

17. The method according to claim 16, further comprising:

generating, by a wireless device, the predetermined signal only when the wireless device failed to connect to the computing device which communicates with the wireless device according to the predetermined wireless communication protocol; and

transmitting, by the wireless device, the predetermined signal.

18. The method according to claim 17, further comprising:

when the computing device is in the second communication mode, the computing device acts as a wireless bridge between the wireless device and a further wireless device.

19. The method according to claim 18, further comprising:

when the wireless device directly connects to the further wireless device, switching the computing device from the second communication mode to the first communication mode.

20. A system, comprising:

a computing device; and

an arrangement coupled to the computing device, the arrangement including a receiver receiving radio frequency signals generated according to a predetermined wireless communication protocol, the arrangement including an envelope detection arrangement screening the radio frequency signals for a predetermined signal utilizing the predetermined wireless communication protocol and having a predetermined envelope sequence,

wherein, upon detection of the predetermined signal, the arrangement transmits a further signal to the computing device, the further signal being an instruction for the computing device to execute a predetermined action.

21. The system according to claim 20, wherein the predetermined action is a change from a first communication mode to a second communication mode.

22. The system according to claim 21, wherein the computing device conducts communications only when in the second communication mode.