RADIO GATEWAY SYSTEM AND METHOD FOR INTERFACING A RADIO SYSTEM AND AN IP NETWORK

• US 20090080400A1
• Filed: 12/01/2008
• Published: 03/26/2009
• Est. Priority Date: 04/01/2005
• Status: Active Grant

• Current Assignee: Motorola Solutions Connectivity Incorporated (Motorola Solutions, Inc.)
• Original Assignee: CML Emergency Services, Inc.
• Inventors: Olivier, Pierre, Roberts, Douglas Gordon
• Granted Patent: US 7,782,826 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A radio gateway system and method for interfacing one or more radio systems and a packet network. The system comprises a plurality of gateways, each gateway including a radio interface port, a protocol converter and packet interface. The gateways convert audio and signaling from the radio system into packet signals in a generic protocol. The gateways also convert packet signals in the generic protocol into audio and signaling in a protocol understandable by a respective radio system.

Claims

1. A communication system including at least one controller for enabling a plurality of radio systems to communicate over a packet network, each radio system communicating one of at least two different radio signals transmitted using different radio-protocols, the communication system comprising:

a plurality of gateways adapted to communicate over an IP link using a generic IP data packet protocol having a component for storing audio signals and a component for storing radio control signals;

for each radio signal of the at least two radio signals;

at least one gateway of the plurality of gateways converting audio and control protocol signals in the radio protocols to and from audio and control components of the generic IP data packet protocol for at least one radio system that communicates using the radio signal; and

wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least one event selected from a group consisting of;

activating a transmitter in a radio station;

releasing a transmitter in a radio station;

tuning a transmitter in a radio station to a specific RF channel;

switching a receiver in a radio station to a specific RF channel; and

monitoring the carrier status of a radio station.

2. The communication system of claim 1, wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least one events selected from a group consisting of:

sending a data packet to a specific subscriber unit via a radio station;

receiving a data packet from a specific subscriber unit via a radio station; and

sending a paging alert tone to a specific subscriber unit via a radio station.

3. The communication system of claim 1, further comprising a control system for determining if a gateway in the plurality of gateways is active and directing communications to and from at least one radio system through the gateway if the gateway is active.

4. The communication system of claim 3, wherein the control system comprises a plurality of distributed call management modules, each distributed call management module configured to understand the generic protocol.

5. The communication system of claim 4, wherein at least one gateway communicates with the packet network through at least one distributed call management module.

6. The communication system of claim 5, wherein the at least one gateway is hardwire connected to the at least one distributed call management module.

7. The communication system of claim 5, further comprising a LAN (Local Area Network) between the at least one gateway and the distributed call management module

8. The communication system of claim 1, further comprising the plurality of radio systems.

9. The communication system of claim 8, wherein each radio system comprises a plurality of radio stations, each radio station in communication with at least one gateway.

10. The communication system of claim 8, further comprising the packet network.

25. The communications system of claim 1, wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least the event of sending a paging alert tone to a specific subscriber unit via a radio station.

11. A gateway comprising:

a radio interface port connectable to communicate with a radio system;

a packet interface operable to send and receive packet signals; and

a protocol converter adapted to convert audio and control protocol signals in radio protocols received from the radio system via the radio interface port into IP based packet signals in a generic IP data packet protocol having a component for storing the audio signals and a component for storing the radio control signals and to convert IP based packet signals in the generic IP data packet protocol received via the packet interface into the audio and control protocol signals communicated by the radio system;

wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least one event selected from a group consisting of;

activating a transmitter in a radio station;

releasing a transmitter in a radio station;

tuning a transmitter in a radio station to a specific RF channel;

switching a receiver in a radio station to a specific RF channel; and

monitoring the carrier status of a radio station.

12. The gateway of claim 11, wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least-one event selected from a group consisting of:

sending a data packet to a specific subscriber unit via a radio station; and

receiving a data packet from a specific subscriber unit via a radio station.

13. The gateway of claim 11, further comprising a plurality of radio interface ports, each radio interface port operatively connectable to communicate with at least one radio station within the radio system.

14. The gateway of claim 11, wherein the packet interface is connectable to communicate over a LAN (Local Area Network).

15. The gateway of claim 11, wherein the packet interface is connectable to communicate over an IP (Internet Protocol) network.

16. The gateway of claim 11, wherein the packet interface provides a status of the radio gateway to a control system.

17. The gateway of claim 11, wherein the packet interface sends and receives packet signals in accordance with a MGCP (Media Gateway Control Protocol).

18. The gateway of claim 11, wherein the interface sends and receives packet signals in accordance with a MEGACO (Media Gateway Control) protocol.

19. The gateway of claim 11, wherein the packet interface sends and receives packet signals in accordance with an RTP (Real Time Protocol) audio protocol.

20. The gateway of claim 11, wherein the packet interface sends and receives packet signals in accordance with an audio protocol including packets in accordance with any one of G. 711, G. 723, G. 729, GSM (Global System for Mobile Communications), IMBE (Improved MultiBand Excitation) and TETRA (Terrestrial Trunked Radio) formats.

21. The gateway of claim 11, wherein the protocol converter comprises a digital signal processor and a communication processor.

22. The gateway of claim 21 further comprising a provisioning interface operatively connectable to communicate with a provisioning terminal.

23. A method of enabling a radio system to communicate via a packet network, said method comprising:

receiving audio and control protocol signals transmitted from the radio system at a radio gateway;

converting at least one of the plural audio and control signals into IP based packet signals in a generic IP data packet protocol having a component for storing audio signals and a component for storing radio control signals;

providing the packet signals in the generic IP data packet protocol to the packet network for distribution to a desired destination;

receiving IP based packet signals from the packet network, wherein said IP based packet signals are in the generic IP data packet protocol;

converting the IP based packet signals from the packet network into non-IP based audio and control protocol signals in a protocol understandable by the radio system; and

transmitting the converted non-IP based audio and signaling to the radio system.

wherein the component of the generic IP data packet protocol for storing radio control signals is configured to store at least one event selected from a group consisting of;

activating a transmitter in a radio station;

releasing a transmitter in a radio station;

tuning a transmitter in a radio station to a specific RF channel;

switching a receiver in a radio station to a specific RF channel; and

monitoring the carrier status of a radio station.

24. The method of claim 23, further comprising:

determining a status of a radio gateway associated with a radio station; and

selecting the radio gateway to receive and convert audio and signaling from the radio system and to receive and convert packet signals from the packet network if the radio gateway is active.