ENHANCED WIRELESS PACKET DATA COMMUNICATION SYSTEM, METHOD, AND APPARATUS APPLICABLE TO BOTH WIDE AREA NETWORKS AND LOCAL AREA NETWORKS
First Claim
1. A remote monitoring system comprising:
- a remote endpoint device including,a position location device configured to determine a position of the remote endpoint device,a frequency selection device configured to select a transmission frequency of the remote end point device based on the position determined by the position location device, anda transmitter configured to transmit information at the transmission frequency selected by the frequency selection device; and
a base station configured to receive the information transmitted by the transmitter and to transmit the received information to a communication network.
8 Assignments
0 Petitions
Accused Products
Abstract
A cellular wireless packet data communication system containing transmit-only endpoint devices which transmit to receive-only base stations. The system is configured to allow for large area coverage (e.g., a metropolitan area) with far fewer number base stations than are required with conventional two-way cellular systems. The base station coverage areas are configured to overlap, allowing for reception of packets at multiple base stations. A data concentrator resolves redundantly received messages. The network is configurable as a WAN, a LAN, or a combination of the two. Novel modulation techniques (e.g., a 16QAM submodulation together with a 7FSK modulation) are used such that low cost components can be used in the transmitters and receivers while achieving outstanding probability of success performance. The endpoint devices are battery operated and accordingly, are designed for low power consumption and multi-year battery life. The system is used in a variety of applications including remote monitoring and mobile communications.
53 Citations
2 Claims
-
1. A remote monitoring system comprising:
-
a remote endpoint device including, a position location device configured to determine a position of the remote endpoint device, a frequency selection device configured to select a transmission frequency of the remote end point device based on the position determined by the position location device, and a transmitter configured to transmit information at the transmission frequency selected by the frequency selection device; and a base station configured to receive the information transmitted by the transmitter and to transmit the received information to a communication network. - View Dependent Claims (2)
-
Specification