Cellular system access monitor

• US 5,289,526 A
• Filed: 08/24/1990
• Issued: 02/22/1994
• Est. Priority Date: 08/24/1990
• Status: Expired due to Term

• Current Assignee: Agilent Technologies, Inc.
• Original Assignee: Safco Corporation
• Inventors: Chymyck, Daryl J., Lemke, Kurt T.
• Primary Examiner(s): Ng, Jin F.
• Assistant Examiner(s): Bost, Dwayne D.
• Application Number:
  US07/572,666
• Time in Patent Office: 1,278 Days
• Field of Search: 455/33, 455/67, 379/58, 379/59, 379/60, 379/63
• US Class Current: 455/424
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

A cellular system access monitor for monitoring and reporting information relating to the operation of cellular telephone systems. The monitor features a cellular telephone of current design, responding to the expanded spectrum of 832 channels. The cellular telephone communicates with a controller using a self-clocking data transmission scheme to improve the reporting and displaying of cellular system parameters, such as cellsite control-channel identification numbers and textual cellsite identification information. Additionally, the monitor employes a calibration feature for measuring and displaying accurately signal strength in decibels. System parameters are shown on a bit-mapped display.

Claims

1. A combination for calibrating a cellular system access monitor in dBm units to report a received radio-frequency (RF) signal amplitude in dBm units and which signal is transmitted from a cellular system transmitter, comprising a cellular telephone transceiver having an antenna port, a calibrated RF signal source connected to the antenna port for inputting and applying the amplitude of the applied RF signal in discrete dBm steps, a cellular telephone transceiver utilizing a data transmission protocol for reporting an RF input signal amplitude in Received Signal Strength Indicator (RSSI) units emanating from the cellular system transmitter, a controller utilizing the data transmission protocol for continuously retrieving the amplitude in RSSI units of the RF input signal applied to the cellular telephone transceiver from the cellular system transmitter, a communications data bus utilizing the data transmission protocol linking the cellular telephone transceiver and the controller to transfer the amplitude in RSSI units of the RF input signal applied to the cellular telephone transceiver from the cellular system transmitter to the controller, means within the controller for translating the amplitude of the RSSI signal received by the cellular telephone transceiver into discrete dBm steps from the cellular system transmitter, and means connected to the translating means for storing the RSSI and dBm translation.

2. The combination of claim 1 in which the reporting means includes a visual display which is connected to the translating means and in which display the signal amplitude of the RF signal received by the cellular telephone transceiver is displayed in discrete dBm steps.

3. A combination for calibrating a cellular system access monitor in dBm units to report a received radio-frequency (RF) signal amplitude in dBm units and which signal is transmitted from a cellular system transmitter, comprising a cellular telephone transceiver having an antenna port, a calibrated RF signal source connected to the antenna port for inputting and applying the amplitude of the applied RF signal in discrete dBm steps, a cellular telephone transceiver utilizing a data transmission protocol for reporting an RF input signal amplitude in Received Signal Strength Indicator (RSSI) units emanating from the cellular system transmitter, a means utilizing the data transmission protocol for continuously retrieving the amplitude in RSSI units of the RF input signal applied to the cellular telephone transceiver from the cellular system transmitter, a communications data bus utilizing the data transmission protocol linking the cellular telephone transceiver and the utilizing means to transfer the amplitude in RSSI units of the RF input signal applied to the cellular telephone transceiver from the cellular system transmitter to the utilizing means, means for translating the amplitude of the RSSI signal received by the cellular telephone transceiver into discrete dBm steps from the cellular system transmitter, means connected to the translating means for storing the RSSI and dBm translation and means for reporting the dBm translation.

4. The combination of claim 3 in which the reporting means includes a visual display which is connected to the translating means and in which display the signal amplitude of the RF signal received by the cellular telephone transceiver is displayed in discrete dBm steps.