Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1999-05-13
2000-11-07
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
455426, 455456, H04B 726
Patent
active
061443360
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to telecommunication technology and particularly includes improved systems and methodologies to communicate geo-position data representative of a present location of a remote communication apparatus, through the audio (voice) traffic channel of a telecommunication network, for example to a Public Safety Answering Point (PSAP) like the U.S. 911 PSAPs.
BACKGROUND OF THE INVENTION
Vice-president Al Gore recently announced development of additional civilian signals to be provided by the satellite-based U.S. Global Positioning System (GPS). "The additional civilian signals will significantly improve navigation, positioning and timing services to millions of users worldwide--from backpackers and boaters to farmers and fishermen, from airline pilots to telecommunications provider, and from scientists to surveyors." Vice president Gore said. "GPS has become an engine of economic growth and efficiency as businesses and consumers are continually developing new and creative applications of the system." Indeed, applications of the GPS and other satellite-based positioning systems are evolving rapidly for commercial, public safety and national security purposes.
Public safety can benefit tremendously from application of global locating technology, if it can be done reliably, accurately and economically. Cell telephones are becoming ubiquitous in the U.S. and around the globe, giving users the ability to place a call, in particular an emergency call, from almost anywhere at any time. The difficulty is that it is difficult to determine the location of the mobile caller. For a fixed location or "landline" telephone, the technology to trace the call back to the telephone location is already in place. It is more difficult to locate a mobile caller, yet the need is exploding.
In Massachusetts alone, for example, there are reportedly 40,000 cellular 911 calls per month placed to the PSAP (Public Safety Access Point) in Framingham which is the point from which all cellular 911 calls are routed. According to the CTIA (Cellular Telecommunications Institute of America), in 1997 there were in excess of 18 million cellular 911 calls placed in the U.S. The problem of identifying the location of emergency 911 callers is exacerbated by the fact that the individual may not be conscious, may not speak the English language, may be too hysterical to give adequate information to the dispatchers, or more likely, does not know where he/she is. In a panic situation, most 911 callers have not a clue as to where they are.
The U.S. government has issued a challenge to the communications industry to fix the problem. The FCC presently requires that wireless carriers must locate a 911 call by cell sector. A more recent FCC Report and Order (see Docket Number 94-102; 96-264) requires that by 2001, covered carriers must have the capability to identify the latitude and longitude of a mobile unit making a 911 call within a radius of no more than 125 meters in 67% of all cases. Even greater accuracy will of course provide that much more benefit. For example, finding an injured person in a crowded urban center may be difficult--and delayed--where the location information is off by 100 meters. A "fix" within a few meters would be more useful.
Various methods to locate a caller or mobile unit, at least approximately, are known. In one commercial example, The Code Alarm Company of Madison Heights, Mich. offered a system in which a dedicated cellular phone was provided with a LORAN receiver and a separate LORAN antenna, with the result information being modemed to a central dispatch office in Wisconsin. This system was not well received because of costs that involved the payment for a dedicated cellular phone, the provision of a separate long whip LORAN antenna, and the fact that the calls were modemed to a central processing point from which services were to be dispatched. The utilization of a central processing office suffered from the problem of "no local knowledge" in which knowledge of local stre
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Preston Dan A.
Preston Joseph D.
Vroman James
Integrated Data Communications, Inc.
Issing Gregory C.
LandOfFree
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