Wireless security messaging model

• US 7,995,985 B2
• Filed: 12/31/2007
• Issued: 08/09/2011
• Est. Priority Date: 09/10/2007
• Status: Active Grant

• Current Assignee: UTC Fire & Security Americas Corporation, Inc. (Carrier Global Corporation)
• Original Assignee: UTC Fire & Security Americas Corporation, Inc. (Carrier Global Corporation)
• Inventors: van Cann, Jacobus Robertus Andreas, Verstraelen, Johannes Gertrudis Raymundus
• Primary Examiner(s): Phu; Sanh D
• Application Number:
  US11/967,748
• Publication Number:
  US 20090068977A1
• Time in Patent Office: 1,317 Days
• Field of Search: 455/343.1, 455/436, 455/574, 455/464, 455/69, 455/41.1, 370/310
• US Class Current: 455/343.1
• CPC Class Codes: H04B 1/16 Circuits
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Reducing power consumption and interference in wireless communication is provided. For example, in one embodiment, a method is provided that listens for radio frequency (“RF”) activity on a receiver utilizing a first receiver antenna. When no RF activity is detected the receiver is switched “on” and a command is transmitted. If a reply to the transmission is not received the receiver is turned “off.” After an expiration of time, the receiver is again switched “on” and another command is transmitted on a second antenna coupled to the receiver. Thereafter, if a reply is not received the receiver is again turned “off.” Embodiments of the invention also include other methods, computer-readable mediums, apparatuses, and systems that contain features similar to the features in the above described method.

Claims

1. A method of establishing wireless communication between a first device and a second device, the method comprising:

listening at the first device for radio frequency (“

RF”

) activity on a receiver utilizing a first antenna;

transmitting from the first device a command utilizing the first antenna when no RF activity is detected;

switching the receiver “

on”

after the transmission to listen for a reply from the second device;

turning the receiver “

off”

if the receiver does not receive a reply within a first time span;

switching the receiver back “

on”

to again listen for the reply from the second device;

if no reply is received before an end of a predetermined period, attempting a retry of establishing communication with the second device by transmitting a command using at least one of a different antenna and a different transmit power level;

switch the receiver “

on”

to listen for a reply by the second device to the retry transmitted command; and

switching the receiver “

off”

if no reply from the second device is received.

2. The method of claim 1, wherein the receiver comprises a security device and the command comprises a “

Request_for_Update.”

3. The method of claim 1 and further comprising:

determining whether the first device is turned “

on”

for a first time, is attempting a retry, or has already established communication with the second device; and

transmitting at a power level depending on whether the transmitting is a first time transmission, a retry transmission, or a transmission after a reply has been received from the second device.

4. The method of claim 3, wherein an initial power level is selected if the first device is sending a first time transmission.

5. The method of claim 4, wherein a maximum power level is selected if the first device is sending a retry transmission.

6. The method of claim 3, wherein the power level is adjusted for transmissions after a reply has been received from the second device based upon received signal strength data provided by the second device in the reply.

7. The method of claim 6, wherein adjustment of the power level comprises one of reducing the power level by about 5 decibels and increasing the power level by about 5 decibels.