SYSTEM AND METHOD FOR REAL-TIME DATA TRANSMISSION USING ADAPTIVE TIME COMPRESSION

• US 20080253311A1
• Filed: 04/16/2007
• Published: 10/16/2008
• Est. Priority Date: 04/16/2007
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: JIN, XIN
• Granted Patent: US 8,819,110 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04B 1/662 using a time/frequency relationship, e.g. time compression or expansion
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A system and method is provided for real-time data transmission using adaptive time compression that is based on an estimation of network load, one or more media properties of the real-time data, and/or a battery level of the mobile device. A first embodiment provides a mobile device operable to transmit real time data using the adaptive time compression. Another embodiment provides a wireless network operable to transmit real-time data using the adaptive time compression. Another embodiment provides a wireless network operable to determine a time compression ratio, which is used for the adaptive time compression The time compression ratio might be sent to the mobile device for use by the mobile device in up (reverse) link transmission, or by the mobile device in down (forward) link reception, or both. Another embodiment provides a mobile device operable to enter a low power consumption mode while not actively transmitting or receiving.

Claims

1. A method comprising:

transmitting real-time data using adaptive time compression that is based on at least an estimation of network load.

2. The method of claim 1 wherein transmitting real-time data using adaptive time compression comprises at least one of:

transmitting real-time data using adaptive time compression over a CDMA-based air interface;

transmitting real-time data using adaptive time compression over a DSSS-based air interface; and

transmitting real-time data using adaptive time compression over an OFDM-based air interface.

3. The method of claim 1 for execution by a mobile device, the method further comprising:

receiving an indication of a time compression ratio that is based on at least the estimation of network load;

wherein transmitting the real-time data using adaptive time compression comprises applying the time compression ratio when transmitting the real-time data.

4. The method of claim 3 wherein the indication of the time compression ratio comprises at least some of:

an encoding configuration, an encoding rate, a symbol repetition factor, a puncturing/extending configuration, a puncturing/extending factor, a spreading configuration, a spreading factor, a modulation configuration, a level/constellation size of modulation, a number of sub-carriers, and an index that points to a predetermined combination of parameter values.

5. The method of claim 3 further comprising:

transmitting an indication of at least one media property of the real-time data;

wherein the indication of the time compression ratio is based on at least the at least one media property of the real-time data.

6. The method of claim 3 further comprising:

transmitting an indication of a battery level of the mobile device;

wherein the indication of the time compression ratio is based on at least the battery level of the mobile device.

7. The method of claim 3 further comprising:

transmitting an indication of an estimation of channel quality;

wherein the indication of the time compression ratio is based on at least the estimation of channel quality.

8. The method of claim 3 wherein the real-time data is transmitted in data bursts separated by time, the method further comprising:

placing a portion of the mobile device in a low power mode while in-between the data bursts.

9. The method of claim 1 for execution by a wireless network, the method further comprising:

determining a time compression ratio based on at least the estimation of network load;

wherein transmitting the real-time data using adaptive time compression comprises applying the time compression ratio when transmitting the real-time data.

10. The method of claim 9 further comprising:

determining the estimation of network load based on forward-link load.

11. The method of claim 9 further comprising:

determining at least one media property of the real-time data;

wherein the time compression ratio is determined based on the at least one media property of the real-time data.

12. The method of claim 9 further comprising:

receiving an indication of a battery level of the mobile device;

wherein the time compression ratio is determined based on at least the battery level of the mobile device.

13. The method of claim 9 further comprising:

determining an estimation of channel quality;

wherein the time compression ratio is determined based on at least the estimation of channel quality.

14. The method of claim 9 further comprising:

transmitting to the mobile device an indication of the time compression ratio.

15. A computer readable medium having computer executable instructions stored thereon for execution on a processor so as to implement the method of claim 1.

16. A mobile device comprising:

a wireless access radio operable to transmit real-time data using adaptive time compression that is based on at least an estimation of network load.

17. A wireless network comprising:

an adaptive time compression function operable to transmit real-time data using adaptive time compression that is based on at least an estimation of network load.

18. A method for execution in a wireless network, the method comprising:

determining for a mobile device a time compression ratio based on at least one of;

an estimation of network load, at least one media property of the real-time data, and a battery level of the mobile device;

transmitting to the mobile device an indication of the time compression ratio; and

receiving real-time data transmitted using adaptive time compression;

wherein receiving the real-time data comprises using the time compression ratio.

19. The method of claim 18 wherein the indication of the time compression ratio comprises at least some of:

an encoding configuration, an encoding rate, a symbol repetition factor, a puncturing/extending configuration, a puncturing/extending factor, a spreading configuration, a spreading factor, a modulation configuration, a level/constellation size of modulation, a number of sub-carriers, and an index that points to a predetermined combination of parameter values.

20. The method of claim 18 wherein determining the time compression ratio comprises negotiating with the mobile device for the time compression ratio.

21. The method of claim 18 wherein the time compression ratio is determined based on at least the estimation of network load, the method further comprising:

determining the estimation of network load based on at least one of forward-link load and reverse-link load.

22. The method of claim 18 further comprising:

receiving an indication of at least one media property of the real time data;

wherein the time compression ratio is determined based on the at least one media property of the real-time data.

23. The method of claim 18 further comprising:

receiving an indication of the battery level of the mobile device;

wherein the time compression ratio is determined based on at least the battery level of the mobile device.

24. The method of claim 18 further comprising:

determining an estimation of channel quality;

wherein the time compression ratio is determined based on at least the estimation of channel quality.

25. A computer readable medium having computer executable instructions stored thereon for execution on a processor so as to implement the method of claim 18.

26. A wireless network comprising a time compression determination function operable to:

determine for a mobile device a time compression ratio based on at least one of;

an estimation of network load, at least one media property of the real-time data, and a battery level of the mobile device;

transmit to the mobile device an indication of the time compression ratio; and

receive real-time data transmitted using adaptive time compression;

wherein receiving the real-time data comprises using the time compression ratio.