GRACEFUL DEGRADATION FOR COMMUNICATION SERVICES OVER WIRED AND WIRELESS NETWORKS

• US 20110064027A1
• Filed: 11/17/2010
• Published: 03/17/2011
• Est. Priority Date: 10/19/2007
• Status: Active Grant

• Current Assignee: Voxer IP LLC (Voxer, Inc.)
• Original Assignee: Rebelvox LLC (Voxer, Inc.)
• Inventors: Katis, Thomas E., Panttaja, Mary G., Ranney, Matthew J., Panttaja, James T.
• Granted Patent: US 8,391,213 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 12/1827 Network arrangements for conference optimisation or adaptation
• 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 51/04 Real-time or near real-time messaging, e.g. instant messaging [IM]
• CPC Class Codes: H04L 51/226 Delivery according to priorities
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/4015 where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
• CPC Class Codes: H04L 65/4053 without floor control
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355

Abstract

An application for gracefully extending the range and/or capacity of voice communication systems. The application includes a module for the persistent storage of voice media on a communication device as the voice media is created. When the usable bit rate on the network is poor and below that necessary for conducting live communication of the voice media, a transmit module transmits the voice media out of storage at or below the available usable bit rate on the network. Although latency may be introduced, the storage of transmitted media provides the ability to extend the useful range and/or capacity of the network when conditions on the network otherwise make live communication impossible or impractical.

Claims

1. A computer application embedded in a computer readable medium and intended to be executed on a communication device, the application comprising:

a receiving module configured to receive voice media created using the communication device, the communication device configured to be connected to a network;

an encode module configured to encode the voice media to generate a first bit rate representation of the media created while using the communication device;

a storage module configured to store the first bit rate representation of the voice media created while using the communication device; and

a transmit module configured to;

(i) ascertain if the usable bit rate on the network falls below a bit rate threshold, the bit rate threshold defining a bit rate throughput sufficient for maintaining real-time communication of the voice media; and

(ii) transmit the voice media from storage when the ascertained usable bit rate is below the bit rate threshold, the voice media being transmitted at a bit rate below the bit rate threshold, thereby effectively extending the usable range and/or capacity of the network for voice communication when the ascertained usable bit rate falls below the bit rate threshold.

2. The application of claim 1, wherein the transmit module ascertains if the usable bit rate on the network falls below the bit rate threshold by:

receiving one or more reports, each including a measured transfer rate at which bits transmitted over the network safely arrive at a recipient over a predetermined period of time;

computing the usable bit rate on the network based on the received one or more reports; and

comparing the computed usable bit rate with the bit rate threshold.

3. The application of claim 1, wherein the transmit module ascertains if the usable bit rate on the network falls below a bit rate threshold by determining when only approximately 80% or less of the bit rate throughput needed to transmit and decode the voice media at the same rate the voice media was encoded is available on the network.

4. The application of claim 1, wherein the transmit module is further configured to transmit voice media created using the communication device without introducing latency when the ascertained usable bit rate exceeds the bit rate threshold.

5. The application of claim 4, wherein the transmit module is further configured to transmit the voice media by:

(i) defining a transmission loop;

(ii) ascertaining the voice media available for transmission in the defined transmission loop; and

(iii) transmitting the available voice media during the transmission loop.

6. The application of claim 5, wherein the transmit module is further configured to define successive transmission loops and repeat (i) through (iii) for each loop.

7. The application of claim 1, wherein the transmit module is further configured to transmit the voice media from storage by varying the amount of latency during the transmission as needed so that the transmission bit rate substantially meets or is below the usable bit rate on the network when the ascertained usable bit rate falls below the bit rate threshold.

8. The application of claim 1, wherein the transmit module is further configured to transmit the voice media from storage by:

defining a transmission loop;

determining if the ascertained usable bit rate is not sufficient to transmit the available voice media in the defined transmission loop;

ascertaining time-sensitive voice media among all available media ready for transmission; and

transmitting only the available time-sensitive voice media if the ascertained usable bit rate is sufficient to transmit only the available time-sensitive voice media.

9. The application of claim 1, wherein the transmit module is further configured to transmit the voice media from storage by:

determining if the ascertained usable bit rate is not sufficient to transmit the first bit rate representation of the voice media;

generating a reduced bit rate representation of the voice media, the reduced bit rate representation using fewer bits relative to the first bit rate representation; and

transmitting the reduced bit rate representation of the voice media.

10. The application of claim 9, wherein the transmit module is further configured to generate the reduced bit rate representation by using fewer bits per unit of time relative to the first bit rate representation when packetizing the voice media for transmission.

11. The application of claim 9, wherein the transmit module is further configured to generate the reduced bit rate representation by, when packetizing the voice media for transmission, using (a) one or more different codec settings, (b) one or more different codecs, (c) a compression algorithm;

or (d) any combination of (a) through (c).

12. The application of claim 1, wherein the transmit module is further configured to transmit the voice media from storage by increasing the packetization interval used to transmit the voice media.

13. The application of claim 1, wherein the transmit module is further configured to transmit the voice media from storage by adjusting the transmission rate at which packets containing the voice media are transmitted.

14. The application of claim 1, wherein the receive module and the storage module are further configured to cooperate to receive and store voice media received over the network at the communication device.

15. The application of claim 14, further comprising a render module, the render module configured to selectively render the received media either (i) as the media is received over the network in a real-time mode or (ii) from storage in a time-shifted mode.

16. The application of claim 15, wherein the render module is further configured to seamlessly transition the rendering of the received media between the real-time mode and the time-shifted mode.

17. The application of claim 14, further comprising a data store module configured to:

(i) maintain a data store;

(ii) noting any missing, corrupted or reduced bit rate versions of the voice media received over the network in the data store; and

(iii) transmit from the communication device over the network requests for retransmission of any voice media noted in the data store.

18. The application of claim 17, wherein the data store module is further configured to:

(iv) remove the notation from the data store as the requests for retransmission are satisfied; and

(v) repeat (i) through (iv) until a complete copy of the voice media received over the network is received and stored, wherein the complete copy is a complete bit rate representation of the voice media as it was originally encoded.

19. The application of claim 1, wherein the transmit module is further configured to effectively extend the usable range and/or capacity of the network when the ascertained usable bit rate falls below the bit rate threshold to just above the point before the usable bit rate on the network is reduced to nothing.

20. The application of claim 1, wherein the transmit module is further configured to:

ascertain when the usable bit rate on the network is reduced to nothing;

delay the transmission of the voice media created using the communication device when the usable bit rate on the network is reduced to nothing; and

transmit the voice media from storage as the usable bit rate on the network increases.

21. The application of claim 1, further comprising a conversation module configured to define a conversation and ascertain the voice media created using the communication device and voice media received over the network associated with the conversation.

22. The application of claim 1, wherein the storage module is further configured to store the voice media created using the communication device and voice media received over the network in a time-based format.

23. The application of claim 21, wherein the storage module is further configured to store the voice media created using the communication device and voice media received over the network in one of the following:

(i) on the communication device;

(ii) at a location remote from the communication device on the network;

or

(iii) both (i) and (ii).

24. The application of claim 1, wherein the application is intended to be executed on one or more of the following types of communication devices:

land-line phone, wireless phone, cellular phone, mobile phone, satellite phone, computer, radio, server, satellite radio, tactical radio or tactical phone.

25. The application claim 1, wherein the transmit module, in addition to the voice media, is configured to transmit one or more of the following types of media:

video, text, sensor data, position or GPS information, radio signals, or a combination thereof.