AU2002301152B2 - Communications interface adapter - Google Patents

Description

AUSTRALIA

PATENTS ACT 1990 DIVISIONAL APPLICATION NAME OF APPLICANT: Northrop Grumman Corporation ADDRESS FOR SERVICE: DAVIES COLLISON CAVE Patent Attorneys 1 Little Collins Street Melbourne, 3000.

INVENTION TITLE: "Communications interface adapter" The following statement is a full description of this invention, including the best method of performing it known to us: P:\OPERUJCMU4565-99div dc.-23/09/02 -1- COMMUNICATIONS INTERFACE ADAPTER This specification explicitly incorporates by reference the disclosure contained in United States Patent 6,041,243 entitled PERSONAL COMMUNICATIONS UNIT.

The present invention relates generally to telecommunications and more particularly to a communications interface adapter for providing full duplex digital communications between multiple users having radio transceivers.

Wired intercoms for facilitating communications between crew members of military vehicles such as tanks and armored personnel carriers are well known. Such contemporary wired intercom systems comprise a wired communications system within the vehicle itself, as well as headsets which must be worn by the crew members and plugged into the wired intercom system of the vehicle.

However, those skilled in the art will appreciate that such wired intercom systems possess the inherent limitation of being unusable by a crew member who is physically disconnected, not plugged into, the wired intercom system of the vehicle. Thus, when it is necessary for a crew member to bail out or leave the vehicle, that crew member can no longer communicate directly with the vehicle wired intercom system according to such contemporary technology.

In an effort to mitigate the problems associated with bailing out of a vehicle, crew members may be provided with two-way walkie-talkies or radio transceivers. However, as P:\OPERUCM34565-9)div.doc-23/09)/02 -2those skilled in the art will appreciate, such radio transceivers do not communicate directly with the wired intercom system of the vehicle, but rather communicate only with a radio transceiver of the vehicle, typically operated by a radioman or other crew member. Thus, direct communications with the entire crew is not maintained when a person outside of the vehicle communicates via such a radio transceiver.

Those skilled in the art will further appreciate that it is sometimes important for the crew member who has left the vehicle to communicate directly to a member of the crew other than the radioman or other crew member who is operating a radio transceiver within the vehicle. For example, it may be important to tell the driver of the vehicle (who may not be operating the radio transceiver) that it is necessary to perform a particular maneuver in order to avoid damage to the vehicle and/or injury to the crew members. Thus, it will be appreciated that it is very desirable for such a member of the crew, who has left the vehicle, to remain in direct communication with all members of the crew of the vehicle.

In view of the foregoing, it is desirable to provide means for communicating with substantially the entire crew of a vehicle, such as a tank or armored personnel carrier, by a crew member who has bailed out or left the vehicle and has thus unplugged himself from the vehicles wired communications system.

P:OPERjCM 34565-99div doc-23M/0902 -3- As described in greater detail hereinafter, the above mentioned deficiencies associated with the prior art may be alleviated through use of a communications interface adapter for facilitating both wired and wireless communications between crew members of a vehicle, such as a tank or armored personnel carrier, which has a wired intercom and wherein at least some crew members have a headset and a portable radio transceiver. Thus, communication between one or more dismounted crewmen or between crewmen and other vehicles can be maintained.

Such a communications interface adapter may comprise an intercom communications circuit having an input/output port for providing electrical communication between the communications interface adapter and the wired intercom, and also comprise a fixed radio transceiver.

The fixed radio transceiver comprises a receive circuit for receiving radio communications and for communicating the received radio communications via the intercom communication circuit to the wired intercom of the vehicle. The fixed radio transceiver also comprises a transmit circuit for transmitting (via the fixed radio transceiver) communications received via the intercom communication circuit from the wired intercom of the vehicle.

A crew member is provided with wired communications with the wired intercom when the crew member's headset is in electrical communication with the wired intercom and is provided wireless communications with the wired intercom via the fixed radio transceiver of the communication interface adapter and the crew member's portable radio transceiver P:\OPERJCfM\34565-991v doc-23/19/J2 -4when the crew member's headset is not in electrical communication with the wired intercom.

The fixed radio transceiver preferably includes a local antenna disposed proximate the communications interface adapter and a remote antenna disposed externally with respect to the vehicle.

The communications interface adapter may further include a selector switch for selecting either the local antenna or the remote antenna. Alternatively, both antennas may be used simultaneously.

The communications interface adapter may further include a data port in electrical communication with the intercom communication circuit for facilitating communication of digital data via the wired intercom of the vehicle. A headset port may also be provided for facilitating electrical communication with a headset.

Alternatively, all of the headsets of the crew members may be directly attached to the wired intercom system.

In a particular application of the above described communications interface adapter, a first housing within which the intercom communications circuit and the fixed radio transceiver are disposed is configured so as to facilitate attachment thereof to a vehicle bulkhead intermediate to the vehicle bulkhead and a crew station Full Function Crew Station). In this manner, the communications interface adapter is sandwiched between the Crew Station and the vehicle bulkhead. Those skilled in the art will appreciate that a Crew Station is the contemporary P'opr\sew 002301152 Ist spa.do-03/05/104 wired intercom interface adapter to which a headset connects in military vehicles which use the AN/VIC-1, 2, 3, and 4 wired intercom systems.

Control circuitry is disposed within a second housing and preferably includes a rotary selector switch for selecting the operating modes (MONITOR a receive only mode; LOCAL, disabling the external antenna and limiting wireless functions to within the vehicle; BROADCAST, transmitting and receiving from wireless personal communications units onboard and/or offboard the vehicle; and GROUP, permitting two or more vehicles to communicate), and a pair of up/down selector switches for changing volume or channel assignments associated with the wireless communication. The first housing and the second housing are preferably in electrical communication with one another via a cable.

Such a system as disclosed above facilitates communicating with substantially the entire crew of a vehicle, such as a tank or armored personnel carrier, by a crew member who has bailed out or left the vehicle and has thus unplugged himself from the vehicles wired communication system.

In accordance with the present invention there is provided a communications interface adapter in communication with first and second antennas for providing full duplex digital communications between multiple users having radio transceivers, the communications interface adapter comprising: a) first and second mount connectors, the first mount connector being in communication with the first antenna, the second mount connector being in communication with the second antenna; I Pop r\se\2002301152 Istspa .do~-03/05/04 -6b) a radio transceiver for receiving a plurality of radio communicators by activating the second antenna when the adapted is in a reception mode of operation; c) a multiplexer for multiplexing the plurality of radio communications into a composite signal; and d) a radio transmitter for transmitting the composite signal by activating the first and second antennas together when the adapter is in a full-duplex transmission mode of operation; e) wherein multiplexing the plurality of radio communications facilitates simultaneous reception thereof by the radio transceivers.

The multiplexer preferably comprises a summer for summing the wireless communications together. The multiplexer is preferably configured to sum the wireless communications over a predetermined time interval.

The radio receiver is preferably configured to receive a plurality of audio signals and the multiplexer is preferably configured to multiplex the wireless communications into a composite audio signal.

Alternatively, the radio receiver is configured to receive at least one audio signal and/or at least one data signal and the multiplexer is configured to multiplex the wireless communications into a composite audio/data signal.

In accordance with the present invention, there is also provided a communications interface adapter in communication with first and second antennas for facilitating radio communication between a plurality of remotely located radio transceivers, the communications interface adapter comprising: a) first and second mount connectors, the first mount connector being in communication with the first antenna, the P:\op\scs200230I132 I st spado.03/05/04 -7second mount connector being in communication with the second antenna; b) a radio receiver for receiving radio communications from the plurality of remotely located radio transceivers by activating the second antenna when the adapter is in a reception mode of operation; and c) a radio transmitter for transmitting radio communications to the plurality of remotely located radio transceivers by activating the first and second antennas together when the adapter is in a full-duplex transmission mode of operation, the radio transmitter being configured to transmit a repeat request to a first remotely located radio transceiver when a second remotely located radio transceiver is out of range with respect to the communications interface adapter; d) wherein transmission of the repeat request facilitates relaying of communications between the communications interface adapter and the second remotely located radio transceiver.

These, as well as other advantages of the present invention, will be more apparent from the following description and drawings. It is understood that changes in the specific structure shown and described may be made within the scope of the claims without departing from the spirit of the invention Figure 1 is a perspective view of a communications interface adapter constructed according to a preferred embodiment of the present invention, having a crew station mounted thereabove such that the communications interface adapter is sandwiched between the crew station and a vehicle bulkhead; 8 Figures 2 and 3 show the communications interface adapter of Figure 1 with the crew station removed therefrom; and Figure 4 is a perspective view of the control panel for the communications interface adapter of the preferred embodiment.

The detailed description set forth below in connection with the appended drawings is intended as a description of presently preferred embodiment of the invention, and is not intended to represent the only form in which the present invention may be constructed or utilized. The description sets forth the functions and the sequence of steps for constructing and operating the invention in connection with the illustrated embodiment.

It is to be understood, however, that the same or equivalent functions may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the invention. The communications interface adapter of the present invention is illustrated in Figures 1 through 4 which depict a presently preferred embodiment thereof.

Referring now to Figures 1-3, the preferred embodiment communications interface adapter 10 generally comprises a housing 12 having a cover 14. According to the preferred embodiment of the present invention a seal or gasket seals the lid 14 to the housing 12 so as to prevent the undesirable entry of dirt, moisture, or other contaminants.

According to the preferred embodiment of the present invention the top 16 and bottom 17 surfaces of the communications interface adapter are substantially flat so as to facilitate mounting thereof to a bulkhead, particularly mounting of the communications interface adapter sandwiched between a Crew Station 18 and the bulkhead. Bolts 20 pass through flanges 22 of the 9 communications interface adapter 10, as well as similarly configured flanges 24 of the Crew Station 18 so as to facilitate such mounting to a bulkhead. Alternatively, bolts can be used to join the communications interface adapter 10 to the crew station 18 while a separate set of bolts mount the crew station 18 to a bulkhead.

According to the preferred embodiment of the present invention a two pin power connector is mounted to one side of the housing 12 and a six pin connector for facilitating electrical communication to the Crew Station 18 is mounted on the other side thereof. A first bulkhead mount coax connector 30 facilitates electrical communication from the communications interface adapter to a remote antenna, preferably mounted to the outside of the vehicle. A second bulkhead mount coax connector 32 facilitates electrical communication to an internal vehicle antenna 34, which is preferably mounted directly thereto. A 15 pin connector 36 facilitates electrical connection to a separate control panel 38 (Figure

A

six pin circular headset connector 40 facilitates electrical communication between the communications interface adapter 10 and a crew member's headset. A nine pin data connector 42 optionally provides electrical communication to a data input device such as a personal computer.

Referring now to Figure 4, according to the preferred embodiment, the present invention comprises a separate control panel 38. The separate control panel 38 communicates with the communications interface adapter via a cable connected to the LED display 58 via connector 46 and connected to the communications interface adapter via connector 36. The LED display displays volume setting or channel, for example. The control panel 38 is preferably configured such that it may attach to any convenient surface where it may easily be read and manipulated and located near the crewman or vehicle commander who require direct access.

10 Rotary selector switch 48 preferably has four positions. In the monitor position thereof, the communications interface adapter is placed in a MONITOR or listen only configuration and crew members can listen to conversations but can not speak. When the rotary selector switch 48 is placed in a LOCAL position, then only the internal antenna in electrical communication with the communications interface adapter 10 is utilized.

This effectively limits radio reception to inside the vehicle. Thus when the rotary selector switch 48 is in the Local position, it does not receive radio communications.

When the rotary selector switch 48 is in the BROADCAST position thereof, both the interior antenna 34 and the exterior antenna are utilized. This facilitates communications between radio transceivers within the vehicle, as well as those outside the vehicle, such as those of the SINCGARS military radio system. When the rotary selector switch 48 is in the GROUP position thereof, two or more vehicles are enabled to communicate.

On/off switch 50 is used to place the communications interface adapter 10 into and out of service. When the on/off switch 50 is in the on position, radio communications with the wired intercom system of the vehicle are facilitated, as discussed above. When the switch 50 is in the off position, the wired intercom system of the vehicle operates normally, as though the communications interface adapter was not installed.

Mode push button 52, up selector pushbutton 54, down selector pushbutton 56, and LED display 58 cooperate with one another so as to facilitate the selection of desired operating parameters for the communications interface adapter 10. For example, the volume, channel (frequency), and any other desired parameters may be selected utilizing the mode push button 52, the up selector push button 54, the down selector push button 56, and the LED display 58.

11 For example, to select desired channel for radio communications, the mode selector 52 may be depressed repeatedly until a channel number appears in the LED display 58. Then the up selector pushbutton 54 and/or down selector pushbutton 56 may be repeatedly depressed until the desired channel number is displayed. In the same manner, volume and/or any other desired parameters may be changed.

It is understood that the exemplary communications interface adapter described herein and shown in the drawings represents only a presently preferred embodiment of the invention. Indeed, various other modifications and additions may be made to such embodiment without departing from the spirit and scope of the invention.

For example, the housing may be of various different shapes and configurations, as desired. Indeed, the control panel may be built into the housing, if desired.

Thus, these and other modifications and additions may be obvious to those skilled in the art and may be implemented to adapt the present invention for use in a variety of different applications.

Throughout this specification and claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

Claims (7)

1. A communications interface adapter in communication with first and second antennas for providing full duplex digital communications between multiple users having radio transceivers, the communications interface adapter comprising: a) first and second mount connectors, the first mount connector being in communication with the first antenna, the second mount connector being in communication with the second antenna; b) a radio transceiver for receiving a plurality of radio communicators by activating the second antenna when the adapted is in a reception mode of operation; c) a multiplexer for multiplexing the plurality of radio communications into a composite signal; and d) a radio transmitter for transmitting the composite signal by activating the first and second antennas together when the adapter is in a full-duplex transmission mode of operation; e) wherein multiplexing the plurality of radio communications facilitates simultaneous reception thereof by the radio transceivers.

2. The communications interface adapter as recited in claim 1, wherein the multiplexer comprises a summer for summing the wireless communications together.

3. The communications interface adapter as recited in claim 1, wherein the multiplexer is configured to sum the wireless communications over a predetermined time interval. P~'opfftses\2023Ol 152 1st spa.doc-03105/04 -13-

4. The communications interface adapter as recited in claim 1 wherein: a) the radio receiver is configured to receive a plurality of audio signals; and b) the multiplexer is configured to multiplex the wireless communications into a composite audio signal.

The communications interface adapter as recited in claim 1 wherein: a) the radio receiver is configured to receive at least one audio signal and at least one data signal; and b) the multiplexer is configured to multiplex the wireless communications into a composite audio/data signal.

6. A communications interface adapter in communication with first and second antennas for facilitating radio communication between a plurality of remotely located radio transceivers, the communications interface adapter comprising: a) first and second mount connectors, the first mount connector being in communication with the first antenna, the second mount connector being in communication with the second antenna; b) a radio receiver for receiving radio communications from the plurality of remotely located radio transceivers by activating the second antenna when the adapter is in a reception mode of operation; and c) a radio transmitter for transmitting radio communications to the plurality of remotely located radio transceivers by activating the first and second antennas together when the adapter is in a full-duplex transmission mode of operation, the radio transmitter being configured to P:\opca'sce.\202301152 Ist spdc-03105/04 -14- transmit a repeat request to a first remotely located radio transceiver when a second remotely located radio transceiver is out of range with respect to the communications interface adapter; d) wherein transmission of the repeat request facilitates relaying of communications between the communications interface adapter and the second remotely located radio transceiver.

7. A communications interface adapter substantially as hereinbefore described with reference to the accompanying drawings. DATED this 3 rd Day of May, 2004 Northrop Grunman Corporation by its Patent Attorneys DAVIES COLLISON CAVE