Adaptive protocol for packet communications network and method

• US 5,383,187 A
• Filed: 09/18/1992
• Issued: 01/17/1995
• Est. Priority Date: 09/18/1992
• Status: Expired due to Term

• Current Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Original Assignee: Hughes Aircraft Company (Rtx Corporation)
• Inventors: Erickson, Jason C., Vardakas, George M.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Patel, Ajit
• Application Number:
  US07/950,260
• Time in Patent Office: 851 Days
• Field of Search: 370/94.1, 370/94.3, 370/60, 370/97, 370/953, 370/95.1, 370/85.8, 370/95.2, 455/7, 455/11.1, 455/16, 455/18, 455/54.1, 455/56.1, 455/53.1, 340/825.02, 340/825.04, 340/825.44, 340/825.47, 340/825.52
• US Class Current: 370/312
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 40/20 based on geographic position or location

Abstract

A method for routing data through a packet communications network including the steps of generating a concatenated data packet containing a plurality of messages for transmission to a plurality of radios in the network, appending a first set of assignment commands and destination codes to the concatenated data packet, and transmitting the concatenated data packet to a first set of radios of the plurality of radios in a single transmission. The method further includes the steps of extracting messages from the concatenated data packet for the first set of radios, appending a second set of assignment commands and destination codes to the concatenated data packet, and relaying the concatenated data packet to a second set of radios of the plurality of radios in a single transmission. In a preferred embodiment, the adaptive protocol for packet communications network of the present invention forms the concatenated data packet in a headend radio. The data packet includes the set of codes for the first set of radios directly communicating with the headend radio. The data packet is transmitted to the first set of radios in a single transmission during each frame. Messages having a destination code for a radio of the first set of radios are extracted and sent to a host device serving the first set of radios. The data packet is reformatted to include the second set of codes and is retransmitted to the second set of radios in a single transmission.

Claims

1. A packet communications network comprising:

means for generating a concatenated data packet containing a plurality of messages for transmission to a plurality of radios in said network;

means for appending a first set of assignment commands for controlling which radio in a first set of radios of said plurality of radios can transmit and receive and destination codes to said concatenated data packet to form said first concatenated data packet;

means for transmitting said first concatenated data packet to said first set of radios of said plurality of radios in a single transmission;

means for extracting messages from said first concatenated data packet for said first set of radios;

means for appending a second set of assignment commands for controlling which radio in a second set of radios of said plurality of radios can transmit and receive and destination codes to said first concatenated data packet to form said second concatenated data packet; and

means for relaying said second concatenated data packet to said second set of radios of said plurality of radios in a single transmission.

2. The packet communication network of claim 1 wherein said means for generating said concatenated data packet includes a first network control microprocessor.

3. The packet communication network of claim 1 wherein said first means for transmitting said concatenated data packet includes an omnidirectional RF antenna.

4. The packet communication network of claim 1 wherein said second means for relaying said concatenated data packet to said second set of radios is a second network control microprocessor.

5. The packet communication network of claim 1 further including means for applying forward error correction coding to said first concatenated data packet prior to transmission.

6. The packet communication network of claim 5 wherein said means for applying forward error correction coding to said first concatenated data packet is a link control microprocessor.

7. The packet communication network of claim 1 further including means for modulating and demodulating said concatenated data packet.

8. The packet communication network of claim 7 wherein said modulating and demodulating means comprises a transceiver.

9. A method for routing data through a packet communication network, said method comprising the steps of:

generating a concatenated data packet containing a plurality of messages for transmission to a plurality of radios in said network;

appending a first set of assignment command for controlling which radio in a first set of radios of said plurality of radios can transmit and receive and destination codes to said concatenated data packet;

transmitting said concatenated data packet to said first set of radios of said plurality of radios in a single transmission;

extracting messages from said concatenated data packet for said first set of radios;

appending a second set of assignment commands for controlling which radio in a second set of radios of said plurality of radios can transmit and receive and destination codes to said concatenated data packet; and

relaying said concatenated data packet to said second set of radios of said plurality of radios in a single transmission.

10. The method of claim 9 further including the step of determining the receive and transmit assignments for each of said plurality of radios in said network.

11. The method of claim 9 further including the step of applying forward error correction coding to said concatenated data packet prior to transmission.

12. The method of claim 9 further including the step of scheduling said concatenated data package for transmission on an RF channel.

13. The method of claim 9 further including the step of receiving and processing said first concatenated data packet at each of said first set of radios.

14. The method of claim 9 further including the step of performing error detection and correction to said first concatenated data packet at said first set of radios.

15. The method of claim 9 further including the step of appending a checksum bit to said concatenated data packet for identifying individual erroneous messages of said data packet.

16. The method of claim 9 further including the step of discarding individual erroneous messages of said concatenated data packet.

17. The method of claim 9 further including the step of reformatting said second concatenated data packet prior to relaying said data packet to said second set of radios.