Multiplexing and demultiplexing radio channels

• US 9,049,737 B2
• Filed: 12/05/2011
• Issued: 06/02/2015
• Est. Priority Date: 03/25/2009
• Status: Active Grant

• Current Assignee: STA Group, LLC
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Oliveira, Marcelo, Christenson, Steven, Barave, Amit
• Primary Examiner(s): Park, Jung
• Assistant Examiner(s): Nguyen, Chuong M
• Application Number:
  US13/311,545
• Publication Number:
  US 20120093057A1
• Time in Patent Office: 1,275 Days
• Field of Search: 455/3.01, 455/3.06, 370/310, 370/312, 370/351, 370/389, 370/390, 370/392, 370/400, 726/4
• US Class Current: 1/1
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/243 using M+N parallel active paths
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 72/569 of the traffic information

Abstract

In one embodiment, a method and apparatus of multiplexing and demultiplexing radio channels includes receiving data through at least one multicast media channel available for use in an Internet Protocol Interoperability and Communications System (IPICS) comprising multiple communication endpoints linkable to a Land Mobile Radio (LMR) in the IPICS; channel mapping the at least one multicast media channel to multiple media channels of the LMR; receiving an audio signal through the at least one multicast media channel; controlling access to the LMR by applying communication access control policies based on the received data upon reception of the audio signal; and operatively linking the LMR to a specified endpoint through the at least one multicast media channel based on the communication access control policies.

Claims

1. A method, comprising:

receiving data in a multicast channel;

receiving channel mapping information from an Internet Protocol Interoperability and Communications System (IPICS) management system;

using the channel mapping information to map the multicast channel to a radio multicast channel;

receiving an audio signal through the multicast channel;

controlling access to a Land Mobile Radio (LMR) by applying a communication access control policy based on the received data upon reception of said audio signal and by sending, over a communication channel, a command for tuning, by a device, said LMR to the radio multicast channel; and

operatively linking said LMR to an endpoint through said multicast channel based on said communication access control policy by re-streaming the audio signal from the device over the radio multicast channel to the LMR.

2. The method of claim 1, further comprising:

directing a one-way communication from the LMR to a plurality of communication endpoints.

3. The method of claim 1, further comprising:

dropping a reception of the audio signal if another transmission of audio signals is occurring on a different media channel on the LMR.

4. The method of claim 1, further comprising:

creating a priority of channels on the LMR;

receiving a first audio signal on a first channel;

receiving a second audio signal on a second channel;

comparing priorities of the first and second channels; and

dropping a reception of at least one of the first audio signal and the second audio signal based on the priorities.

5. The method of claim 1, wherein the tuning is performed using a control interface.

6. The method of claim 1, wherein a first endpoint provides the audio signal, and the first endpoint comprises any of a push-to-talk media center (PMC), an internet protocol (IP) Phone, a public switched telephone network (PSTN) phone, and a radio.

15. The method of claim 1, wherein the communication access control policy prevents a transmission sent over a radio network unless the LMR is tuned to the radio multicast channel.

16. The method of claim 1, wherein the LMR transmits the audio signal in a multicast media channel frequency over the air.

17. The method of claim 1, wherein the policy maps a radio frequency to a multicast address, indicates whether to perform a blocking of traffic, and indicates whether the blocking should be performed uni-directionally or bi-directionally.

7. An apparatus, comprising:

a processor coupled to a memory; and

a multiplexing element, wherein the apparatus is configured to

receive data in a multicast channel;

receive channel mapping information from an Internet Protocol Interoperability and Communications System (IPICS) management system;

use the channel mapping information to map the multicast channel to a radio multicast channel;

receive an audio signal through the multicast channel;

control access to a Land Mobile Radio (LMR) by applying a communication access control policy based on the received data upon reception of said audio signal and by sending, over a communication channel, a command to tune said LMR to the radio multicast channel; and

operatively link said LMR to an endpoint through said multicast channel based on said communication access control policy by re-streaming the audio signal over the radio multicast channel to the LMR.

8. The apparatus of claim 7, wherein the apparatus is further configured to direct a one-way communication from the LMR to a plurality of communication endpoints.

9. The apparatus of claim 7, wherein the apparatus is further configured to drop a reception of the audio signal if another transmission of audio signals is occurring on a different media channel on the LMR.

10. The apparatus of claim 7, wherein the apparatus is further configured to

create a priority of channels on the LMR;

receive a first audio signal on a first channel;

receive a second audio signal on a second channel;

compare priorities of the first and second channels; and

drop a reception of at least one of the first audio signal and the second audio signal based on the priorities.

11. The apparatus of claim 7, wherein the apparatus is further configured to tune the LMR to a frequency using a control interface.

12. The apparatus of claim 7, wherein the audio signal is re-streamed to an LMR gateway for a subsequent delivery to the LMR.

18. The apparatus of claim 7, wherein the communication access control policy prevents a transmission sent over a radio network unless the LMR is tuned to the radio multicast channel.

19. The apparatus of claim 7, wherein the LMR transmits the audio signal in a multicast media channel frequency over the air.

13. Logic encoded in one or more non-transitory media that includes code for execution and that, when executed by a processor, is operable to perform operations comprising:

receiving data in a multicast channel;

receiving channel mapping information from an Internet Protocol Interoperability and Communications System (IPICS) management system;

using the channel mapping information to map the multicast channel to a radio multicast channel;

receiving an audio signal through the multicast channel;

controlling access to a Land Mobile Radio (LMR) by applying a communication access control policy based on the received data upon reception of said audio signal and by sending, over a communication channel, a command for tuning, by the processor, a Land Mobile Radio said LMR to the radio multicast channel; and

operatively linking said LMR to an endpoint through said multicast channel based on said communication access control policy by re-streaming the audio signal from the processor over the radio multicast channel to the LMR.

14. The logic of claim 13, the operations further comprising:

creating a priority of channels on the LMR;

receiving a first audio signal on a first channel;

receiving a second audio signal on a second channel;

comparing priorities of the first and second channels; and

dropping a reception of at least one of the first audio signal and the second audio signal based on the priorities.

20. The logic of claim 13, wherein the communication access control policy prevents a transmission sent over a radio network unless the LMR is tuned to the radio multicast channel.

21. The logic of claim 13, wherein the LMR transmits the audio signal in a multicast media channel frequency over the air.