Adaptive battery saving controller with signal quality detecting means

• US 5,144,296 A
• Filed: 09/07/1990
• Issued: 09/01/1992
• Est. Priority Date: 09/07/1990
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: DeLuca, Michael J., Nguyen, Tuan K.
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Magistre, Dervis
• Application Number:
  US07/578,997
• Time in Patent Office: 725 Days
• Field of Search: 340/825.44, 340/825.47, 340/825.48, 340/311.1, 455/31, 455/32, 455/38, 455/227, 455/343
• US Class Current: 340/7.35
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04W 52/0238 where the received signal is an unwanted signal, e.g. interference or idle signal
• CPC Class Codes: H04W 88/022 Selective call receivers
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An adaptive battery saving controller for a battery powered communication receiver utilizes a signal quality detector for detecting strong signal and weak signal conditions. During strong signal conditions, the adaptive battery saving controller is capable of suspending the supply of power to the receiver during the reception of message code words not intended for the communication receiver. The adaptive battery saving controller is also capable of suspending the supply of power to the receiver following the detection of a hard address error. During weak signal conditions, the adaptive battery saving controller reverts to conventional battery saving techniques.

Claims

1. A communication receiver capable of receiving a carrier signal having a binary coded message signal modulated thereon and including address code words and message code words corresponding thereto, said communication receiver comprising:

means for receiving and demodulating the transmitted coded message signal;

signal quality detecting means, coupled to said receiving means, for generating a quality indication signal indicating an acceptable carrier signal quality level when the magnitude of the received coded message signal is equal to or greater than a predetermined signal magnitude;

decoding means, coupled to said receiving means, for decoding the received address code words to identify the corresponding message code words intended therefore;

said decoding means further including distinguishing means for distinguishing address code words and message code words; and

battery saving means, responsive to said decoding means and the quality indication signal, for suspending the supply of power to said receiving means following substantially upon the detection by said distinguishing means of received message code words not intended for the communication receiver.

2. The communication receiver according to claim 1, wherein said battery saving means is further responsive to said decoding means for maintaining the supply of power to said receiving means upon the detection by said distinguishing means of received message code words intended for the communication receiver.

3. The communication receiver according to claim 1, wherein the address and message code words include an identification bit for identifying the code word type, and wherein said distinguishing means comprises bit comparing means, for comparing the received code word identification bit to predetermined address and message identification bits, for distinguishing the address code word from the message code word.

4. The communication receiver according to claim 1, wherein said battery saving means is further responsive to said decoding means and the absence of a quality indication signal, for maintaining the supply of power to said receiving means following substantially upon the detection by said distinguishing means of received message code word not intended for the communication receiver.

5. The communication receiver according to claim 1, wherein said signal quality detecting means comprises a received signal strength indicator.

6. The communication receiver according to claim 1, further comprising alerting means, responsive to said decoding means, for generating a sensible alert in response to the received address matching a predetermined address assigned to the communication receiver.

7. The communication receiver according to claim 1, further comprising:

memory means for storing the received message; and

display means, for displaying the stored message.

8. An adaptive battery saving controller for a communication receiver capable of receiving transmitted coded message signals comprising address code words and message code words corresponding thereto, said adaptive battery saving controller comprising:

signal quality detecting means, responsive to the received coded message signals, for generating a quality indication signal indicating an acceptable received signal quality level when the magnitude of the received coded message signal is equal to or greater than a predetermined signal magnitude;

decoding means, for decoding the received address code words to identify the corresponding message code words intended therefore,

said decoding means further including distinguishing means for distinguishing address code words and message code words; and

battery saving means, responsive to said decoding means and to the quality indication signal, for suspending the supply of power to the communication receiver following substantially upon the detection by said distinguishing means of received message code words not intended for the communication receiver.

9. The adaptive battery saving controller according to claim 8, wherein said battery saving means is further responsive to said decoding means for maintaining the supply of power to said receiving means upon the detection by said distinguishing means of receipt of the message code words intended for the communication receiver.

10. The adaptive battery saving controller according to claim 8, wherein the address and message code words include an identification bit for identifying the code word type, and wherein said distinguishing means comprises bit comparing means, for comparing the received code word identification bit to predetermined address and message identification bits, for distinguishing the address code word from the message code word.

11. The adaptive battery saving controller according to claim 8, wherein said battery saving means is further responsive to said decoding means and the absence of a quality indication signal, for maintaining the supply of power to said receiving means following substantially upon the detection by said distinguishing means of received message code word not intended for the communication receiver.

12. The adaptive battery saving controller according to claim 8, wherein said signal quality detecting means comprises a received signal strength indicator.

13. A communication receiver capable of receiving a carrier signal having a binary coded message signal modulated thereon, the coded message signal comprising at least a binary address code word, said communication receiver comprising:

means for receiving and demodulating the transmitted coded message signal;

signal quality detecting means, coupled to said receiving means, for generating a quality indication signal indicating an acceptable carrier signal quality level when the magnitude of the received coded message signal is equal to or greater than a predetermined signal magnitude;

code memory means, for storing a predetermined binary address code word assigned to the communication receiver;

decoding means, coupled to said receiving means, for decoding the received address code word, said decoding means comprising

bit error detecting means, coupled to said receiving means and to said code memory means, for generating a bit error signal when a data bit of the received address code word does not match a corresponding data bit of the predetermined address code word, and

controller means, responsive to the bit error signal and the quality indication signal for generating a first control signal in response thereto; and

battery saving means, responsive to the first control signal for suspending the supply of power to said receiver means following substantially upon the occurrence of the bit error signal.

14. The communication receiver according to claim 13, wherein said controller means is further responsive to the bit error signal and the absence of a quality indication signal for generating a second control signal in response thereto, and said battery saving means is further responsive to the second control signal, for maintaining the supply of power to said receiving means following substantially upon the occurrence of the bit error signal.

15. The communication receiver according to claim 14, wherein said decoding means further comprises:

error counting means, responsive to the absence of the quality indication signal and the bit error signal, for generating an error count signal representing the number of errors detected.

16. The portable communication receiver according to claim 15, wherein said controller means is further responsive to the error count signal for generating the first control signal, and said battery saving means is further responsive to the first control signal for suspending the supply of power to said receiver means when the error count detected is greater than or equal to a predetermined error count.

17. An adaptive battery saving controller for a communication receiver capable of receiving a transmitted coded message signal comprising at least an address code words, said adaptive battery saving controller comprising:

signal quality detecting means, responsive to the received coded message signal, for generating a quality indication signal indicating an acceptable received signal quality level when the magnitude of the received coded message signal is equal to or greater than a predetermined signal magnitude;

code memory means, for storing a predetermined address code word assigned to the communication receiver;

decoding means, for decoding the received address code word,

said decoding means comprising bit error detecting means, coupled to said said code memory means, for generating a bit error signal when a data bit of the received address code word does not match a corresponding data bit of the predetermined address code word, and

controller means, responsive to the bit error signal and the quality indication signal for generating a first control signal in response thereto; and

battery saving means, responsive to the first control signal, for suspending the supply of power to said receiver means following substantially upon the occurrence of the bit error signal.

18. The adaptive battery saving controller according to claim 17, wherein controller means is further responsive to the bit error signal and the absence of a quality indication signal for generating a second control signal in response thereto, and said said battery saving means is further responsive to the second control signal, for maintaining the supply of power to said receiving means following substantially upon the occurrence of the bit error signal.

19. The adaptive battery saving controller according to claim 17, wherein said decoding means further comprises:

error counting means, responsive to the bit error signal, for generating an error count signal representing the number of errors detected.

20. The adaptive battery saving controller according to claim 19, wherein said controller means is further responsive to the error count signal for generating the first control signal, and said battery saving means is further responsive to the first control signal for suspending the supply of power to said receiver means when the error count detected is greater than or equal to a predetermined error count.