Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
First Claim
1. A method for communicating between a wireless subscriber station and both an analog cellular voice communication system and a Cellular Digital Packet Data (CDPD) communication system, said subscriber station being arranged to monitor both incoming analog cellular voice communications and incoming CDPD communications, said method of communication comprising the steps of:
- (A) registering said subscriber station with an analog cellular voice communication system;
(B) registering said subscriber station with said CDPD system, wherein said registration with said CDPD system, comprises;
(1) synchronizing the timing of a first time interval between said subscriber station and said CDPD system, said first time interval defining when said subscriber station is expected to be on a CDPD channel;
(2) switching said subscriber station from said CDPD channel to an analog cellular voice control channel to monitor incoming analog cellular voice communications directed to said subscriber station; and
(3) switching said subscriber station back to said CDPD channel before the end of said first time interval.
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Accused Products
Abstract
A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
82 Citations
10 Claims
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1. A method for communicating between a wireless subscriber station and both an analog cellular voice communication system and a Cellular Digital Packet Data (CDPD) communication system, said subscriber station being arranged to monitor both incoming analog cellular voice communications and incoming CDPD communications, said method of communication comprising the steps of:
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(A) registering said subscriber station with an analog cellular voice communication system;
(B) registering said subscriber station with said CDPD system, wherein said registration with said CDPD system, comprises;
(1) synchronizing the timing of a first time interval between said subscriber station and said CDPD system, said first time interval defining when said subscriber station is expected to be on a CDPD channel;
(2) switching said subscriber station from said CDPD channel to an analog cellular voice control channel to monitor incoming analog cellular voice communications directed to said subscriber station; and
(3) switching said subscriber station back to said CDPD channel before the end of said first time interval. - View Dependent Claims (3, 4, 5, 7, 10)
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2. Apparatus for communicating between a wireless subscriber station and both an analog cellular voice communication system and a Cellular Digital Packet Data (CDPD) communication system, said subscriber station being arranged to monitor both incoming analog cellular voice communications and incoming CDPD communications, said apparatus comprising:
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(A) means for registering said subscriber station with an analog cellular voice communication system;
(B) means for registering said subscriber station with said CDPD system, wherein said means for registering said subscriber station with said CDPD system, comprises;
(1) means for synchronizing the timing of a first time interval between said subscriber station and said CDPD system, said first time interval defining when said subscriber station is expected to be on a CDPD channel;
(2) means for switching said subscriber station from said CDPD channel to an analog cellular voice control channel to monitor incoming analog cellular voice communications directed to said subscriber station; and
(3) means for switching said subscriber station back to said CDPD channel before the end of said first time interval, wherein said means for registering said subscriber station with said CDPD system comprises a diversity receiving antenna and a shared transmitting/receiving antenna. - View Dependent Claims (6, 8, 9)
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Specification