Method and apparatus for increasing the SNR at the RF antennas of wireless end-devices on a wireless communication network, while minimizing the RF power transmitted by the wireless coordinator and routers

• US 20100177707A1
• Filed: 01/13/2009
• Published: 07/15/2010
• Est. Priority Date: 01/13/2009
• Status: Abandoned Application

• Current Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Original Assignee: Metrologic Instruments Incorporated (Honeywell International Inc.)
• Inventors: Essinger, Steven, Schnee, Michael
• Application Number:
  US12/319,902
• Publication Number:
  US 20100177707A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/52 using AGC [Automatic Gain Control] circuits or amplifiers

Abstract

Method and apparatus for increasing the SNR at the RF antenna of a wireless end-device (e.g. wireless electronic-ink display device or sensor) on a wireless communication network having one or more wireless network routers and a network controller, while minimizing the RF power transmitted by the wireless routers and wireless coordinator to the wireless end-devices.

Claims

1. A wireless communication network comprising:

one or more wireless routers, interfaced to a wireless communication medium using a wireless communication interface and a set of wireless communication protocols, and transmitting and receiving data packet signals over said wireless communication medium;

one or more wireless network end-devices, interfaced to said wireless communication medium using said wireless communication interface and said set of wireless communication protocols, and transmitting and receiving data packet signals over said wireless communication medium; and

a wireless network coordinator, interfaced to said wireless communication medium using said wireless communication interface and said set of wireless communication protocols, for managing said wireless communication network;

wherein each said wireless network end-device includes a first RF antenna, a first RF transceiver for receiving data packet signals from each said wireless network router, a processor for processing and analyzing the data packet signals, and said RF transceiver sending an acknowledgment of received data packets to said wireless network router; and

wherein each said network router includes a second RF antenna, an impedance matching network, and a variable-gain transmit power signal amplifier/low-noise receive signal amplifier having a variable sensitivity; and

wherein said variable-gain transmit power signal amplifier/low-noise receive signal amplifier variably controls the power output of the RF transmitter in said wireless router so as to increase the SNR during the reception of RF packet signals transmitted from said wireless router, while minimizing the RF power transmitted by the RF transceiver of said wireless routers over the wireless communication medium.

2. The wireless communication network of claim 1, wherein said acknowledgment of received data packet may include a request to said network wireless router to increase the output signal strength of data packet signals transmitted from said wireless network router.

3. The wireless communication network of claim 1, wherein said one or more wireless network end-devices is a wireless device selected from the group consisting of a wireless electronic-ink display devices, and a wireless electronic-ink display sensor devices.

5. The wireless communication network of claim 1, wherein said acknowledgment of received data packet may include a request to said network wireless router to increase the output signal strength of data packet signals transmitted from said wireless network router;

4. A wireless communication network comprising:

one or more wireless routers, interfaced to a wireless communication medium using a wireless communication interface and a set of wireless communication protocols, and transmitting and receiving data packet signals over said wireless communication medium;

one or more wireless network end-devices, interfaced to said wireless communication medium using said wireless communication interface and said set of wireless communication protocols, and transmitting and receiving data packet signals over said wireless communication medium; and

a wireless network coordinator, interfaced to said wireless communication medium using said wireless communication interface and said set of wireless communication protocols, for managing said wireless communication network;

wherein each said wireless network end-device includes a first RF antenna, a first RF transceiver for receiving data packet signals from each said wireless network router, a processor for processing and analyzing the data packet signals, and said RF transceiver sending an acknowledgment of received data packets to said wireless network router; and

wherein said coordinator includes a second RF antenna, an impedance matching network, and a variable-gain transmit power signal amplifier/low-noise receive signal amplifier having a variable sensitivity; and

wherein said variable-gain transmit power signal amplifier/low-noise receive signal amplifier variably controls the power output of the RF transmitter in said wireless coordinator so as to increase the SNR during the reception of RF packet signals transmitted from said wireless coordinator, while minimizing the RF power transmitted by the RF transceiver of said wireless coordinator over the wireless communication medium.

6. The wireless communication network of claim 4, wherein said one or more wireless network end-devices is a wireless device selected from the group consisting of a wireless electronic-ink display devices, and a wireless electronic-ink display sensor devices.

7. A method of increasing the SNR at the RF antenna of a wireless end-device on a wireless communication network having one or more wireless network routers and a network controller, while minimizing the RF power transmitted by said wireless router to said wireless end-device, said method comprising the steps of:

(a) said wireless end-device waking up and requesting an information signal from said wireless router;

(b) in the event said wireless router detects that the strength of the data packet signal received from said requesting end-network device falls below a predetermined threshold, then said wireless router increases the sensitivity of said low-noise receive signal amplifier if and as necessary;

(c) said wireless router transmits data packets to said requesting wireless end-device, and said wireless end-device processes the received data packets, and then transmits an acknowledgment of received data packets to said wireless router; and

(d) said transmitted acknowledgement of received data from said end-device, including a request to increase output signal strength from said wireless router, and/or resend data packets, as required to optimize the SNR at the RF antenna of said wireless end-device.

8. The method of claim 7, wherein said wireless end-device is wireless electronic-ink display device or a wireless electronic-ink display sensor device.

9. A method of increasing the SNR at the RF antenna of a wireless end-device on a wireless communication network having one or more wireless network routers and a network controller, while minimizing the RF power transmitted by said wireless router to said wireless end-device, said method comprising the steps of:

(a) said wireless end-device waking up and requesting an information signal from said wireless coordinator;

(b) in the event said wireless coordinator detects that the strength of the data packet signal received from said requesting end-network device falls below a predetermined threshold, then said wireless coordinator increases the sensitivity of said low-noise receive signal amplifier if and as necessary;

(c) said wireless coordinator transmits data packets to said requesting wireless end-device, and said wireless end-device processes the received data packets, and then transmits an acknowledgment of received data to said wireless coordinator; and

(d) said transmitted acknowledgement of received data from said end-device including a request to increase output signal strength from said wireless coordinator, and/or resend data packets, as required to optimize the SNR at the RF antenna of said wireless end-device.

10. The method of claim 9, wherein said wireless end-device is wireless electronic-ink display device or a wireless electronic-ink display sensor device.