A cellular telephone system includes a plurality of cell sites and a mobile telephone switching office. Call management, including selection of a cell site most appropriate for a call associated with a mobile unit, are made based on the geographic location of the mobile unit as opposed to the strength of the signal associated with the call. The geographic location of the mobile unit is precisely determined using a NAVSTAR global positioning system, or its equivalent. Each mobile unit includes a GPS receiver that receives information from a geostationary satellite to determine the precise location of the mobile unit. This position information is relayed to the cell site initially managing the mobile unit, and the mobile unit is handed off to a cell site that is most appropriate for the call. Initial selection of an entrance cell site is made based on signal strength, but further call management decisions are made based on location of the mobile unit.

Cellular telephone system that uses position of a mobile unit to make call management decisions

A wireless phone based system to accommodate users of wireless phones for providing information as to the location of certain services such as gasoline stations, movie theatres, drug stores, etc., includes the utilization of a GPS receiver and a wireless phone, with the wireless phone adapted to call a predetermined number requesting the desired service and providing the location of the cellular phone. In one embodiment, the GPS receiver is co-located with the wireless phone in a car, with the wireless phone being carried in a handsfree cradle having a number of service-request buttons, such that depression of a service-request button activates the wireless phone through its bus structure to call a predetermined number and provide the identity of the caller along with the caller's location. In a further embodiment, a single button, located on the phone or on the handsfree cradle, is utilized to cause the wireless phone to dial a concierge service, in which the concierge service has operators and a database, such that the operator can either direct the caller to whatever service the caller desires or take care of the request, with the operator having been apprised of the location of the wireless phone. This allows the operator to key in the latitude and longitude of the wireless phone and access the database of services both as to the type of service and as to the location of the closest service provider.

Location based service request system

A wireless device-based system provides location-based services by determining the location of the wireless device and arranges for the service and the payment therefor.

Location based information system

Embodiments of the invention include a method and apparatus for intelligent handheld device accessory support. A method of one embodiment includes sensing the presence of an accessory plug in a jack of the handheld device, determining a type of accessory device attached to the accessory plug, including receiving electrical signals from pins of the plug and based on the determination, configuring the handheld device, including assigning particular signals to pins of the plug.

Connector system for supporting multiple types of plug carrying accessory devices

A receiver is disclosed which includes an automatic display illumination capability. Upon the receipt of a signal, the display is illuminated until either an interval timer expires, or the signal goes away. In the preferred embodiment, a portable scanning receiver employs a liquid crystal display and an incandescent light. The automatic display capability can be enabled and disabled to a manual display illumination mode of operation. Benefits include improved ease of use in low ambient light conditions and improved battery life.

Automatic display illumination in a receiver

Hand-held microphone consisting of a housing which is of such a size that said housing can be easily held by one hand, said housing including a rotary switch means which generates a digital coded signal for individually selecting one of preset frequencies and a digital coded signal for making a digital display of the channel member corresponding to the selected frequency; a channel number display means which is driven by the digital coded signal from said rotary switch means and makes a digital display of the channel number corresponding to the selected frequency; an electroacoustic transducer means; a transmit/receive switch means which switches between transmitting condition and receiving condition of a transceiver and at the same time actuates said electroacoustic transducer means; and a gain control means which varies the amplification degree of the audio amplifier and/or the radio frequency amplifier in the transceiver, whereby transmission or reception can be made by the operator who handles the transceiver in one hand.

Hand-held microphone for transceiver

A control unit for the transceiver characterized in that the whole operating portions of the transceiver is built into a housing of such a size which makes it easy to grip by one hand and the operator can remote-control the transceiver, holding the housing separate from the transceiver in his hand.

Yukio Ozaki

Papers

Hand-held microphone for transceiver

Control unit for transceiver