초록 ▼

A wireless remote telemetry system which uses low-cost remote communication devices operating on existing wireless communication systems in order to provide real-time reading and control of remote devices. In an embodiment applicable to utility service, consumption of electrical power among a popula

A wireless remote telemetry system which uses low-cost remote communication devices operating on existing wireless communication systems in order to provide real-time reading and control of remote devices. In an embodiment applicable to utility service, consumption of electrical power among a population of customers is measured by a utility metering system having a wireless communication capability. The metering system comprises a remote metering unit which communicates with a central controller over existing wireless communication systems, such as cellular base stations, using existing communication standards. The remote metering unit transmits various messages over a shared random access channel to a central controller. The central controller transmits messages to the remote metering unit over a paging channel. The remote metering unit may operate in a half-duplex mode only. Furthermore, the remote metering unit may provide a gateway to advanced consumer services at the remote location.

대표청구항 ▼

[ We claim:] [10.] A method of remote telemetering in a code-division multiple access (CDMA) communication system in which a first base station having a CDMA random access channel and a CDMA paging channel communicates with a remote telemetry device and a central controller, said CDMA random access

[ We claim:] [10.] A method of remote telemetering in a code-division multiple access (CDMA) communication system in which a first base station having a CDMA random access channel and a CDMA paging channel communicates with a remote telemetry device and a central controller, said CDMA random access channel for carrying a plurality of reporting messages and said CDMA paging channel for carrying a plurality of control messages, said method comprising the steps of:measuring, at said remote telemetry device, a local parameter;transmitting, from said remote telemetry device, a first of said plurality of reporting messages over said CDMA random access channel in response to said measurement;receiving, in said central controller, said first reporting message;generating, in said local controller, a first of said plurality of control messages;transmitting said first control message over said CDMA paging channel; andreceiving, in said remote telemetry device, said first control message.