Network management system access to radio frequency outdoor units in a point-to-multipoint wireless network

• US 20020128043A1
• Filed: 03/09/2001
• Published: 09/12/2002
• Est. Priority Date: 03/09/2001
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Telaxis Communicatoins Corporation (Proxim Wireless Corporation)
• Inventors: Chandler, Joseph
• Granted Patent: US 6,763,221 B2
• Time in Patent Office: Days
• US Class Current: 455/561
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 84/14 WLL [Wireless Local Loop]; RLL [Radio Local Loop]

Abstract

A system for providing network management access to RF outdoor units of a point-to-multipoint wireless network. Network management signals from a network management system (NMS) are transmitted from an outdoor unit (ODU) receiver to destination ODU transmitters via modulation of a low frequency carrier over a frequency reference interconnection carrying a frequency reference signal. The frequency of the carrier is lower than the frequency reference avoiding any interference between the signals.

Claims

1. A system for providing network management access to radio frequency (RF) outdoor units (ODUs) of base station equipment in a point-to-multipoint wireless network, comprising:

an RF outdoor unit receiver;

at least one RF outdoor unit transmitter;

a frequency reference interconnection between the receiver and the at least one transmitter, the interconnection carrying a master frequency reference from the receiver; and

a network management communication path to the transmitters via the receiver modulating network management signals on a frequency carrier multiplexed with the master frequency reference on the frequency reference interconnection.

2. The system of claim 1, further comprising:

a circuit for modulating the network management signals onto the frequency carrier and multiplexing the modulated frequency carrier with the master frequency reference on the frequency reference interconnection, the outdoor unit receiver and the at least one outdoor unit transmitter comprising the circuit.

3. The system of claim 2, wherein the circuit comprises:

a microcontroller, the microcontroller transmitting and receiving the network management signals;

an oscillator, the oscillator generating the frequency carrier modulated by the network management signals;

a duplexer, the duplexer multiplexing and transmitting the modulated frequency carrier with the master frequency reference over the frequency reference interconnection, the duplexer receiving the modulated frequency carrier; and

a peak detector, the peak detector generating the network management signals from the modulated frequency carrier.

4. The system of claim 1 wherein the frequency carrier has a frequency lower than the frequency of the frequency reference signal.

5. The system of claim 1 wherein modulation of the frequency carrier is implemented by one of the digital modulation techniques from the group consisting of on-off keying, frequency shift keying, and dual tone multi-frequency.

6. The system of claim 1 wherein the network management signal implements either a public or proprietary management protocol, the network management signals being used for management and configuration of radio frequency outdoor unit receivers and transmitters.

7. The system of claim 1 wherein the wireless network is an LMDS point-to-multipoint wireless network.

8. The system of claim 1, further comprising:

an indoor unit; and

a network management connection coupling the indoor unit to the receiver, the network management connection carrying the network management signal from the indoor unit to the receiver.

9. The system of claim 1 further comprising:

an indoor unit;

a power/data connection coupling the indoor unit to the outdoor unit receiver, the power/data connection carrying power and intermediate frequency (IF) data signals;

the network management signal being modulated onto a second low frequency carrier, the second modulated low frequency carrier being multiplexed with the power and IF data signals from the indoor unit to the receiver.

10. A system for providing network management access to radio frequency (RF) outdoor units of customer premise equipment in a point-to-multipoint wireless network, comprising:

an RF outdoor unit receiver;

a plurality of RF outdoor unit transmitters;

a frequency reference interconnection carrying a master frequency reference signal from the receiver to the transmitters; and

a network management signal destined for the one or more of the transmitters being modulated onto a low frequency carrier, the modulated low frequency carrier being multiplexed with the master frequency reference signal and transmitted over the frequency reference interconnection for transmission from the receiver to the transmitters.