STREAM SHARING METHOD, APPARATUS, AND SYSTEM

• US 20150180930A1
• Filed: 05/13/2014
• Published: 06/25/2015
• Est. Priority Date: 12/25/2013
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: SUN, Wei-Cheng, SU, Yi-Yu
• Granted Patent: US 9,369,509 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks

Abstract

Disclosed herein are a method and an apparatus for stream sharing, the apparatus comprising a buffer module, a sharing module, and an adjusting module. The sharing module receives a stream based on a first scheduling window and stores received segments of that stream in the buffer module, each received segment corresponding to a receiving time-point. A sharing request including a second scheduling window is received. Among the received segments the sharing module sends one or more requested segments, each of which further corresponding to a sending time-point. The adjusting module selectively adjusts the first scheduling window based on the corresponding receiving time-point and sending time-point of each requested segment. Also disclosed is a stream sharing system which comprises a stream source apparatus for hosting a stream and at least one stream sharing apparatus.

Claims

1. A stream sharing method, comprising:

receiving a stream according to a first scheduling window;

storing a plurality of received segments of the stream in a buffer module, wherein each of the received segments corresponds to a receiving time-point;

receiving a sharing request comprising a second scheduling window;

sending one or more requested segments according to the second scheduling window, wherein each of the one or more requested segments is one of the received segments and further corresponds to a sending time-point; and

selectively adjusting the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one or more requested segments.

2. The stream sharing method according to claim 1, wherein selectively adjusting the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one or more requested segments comprises:

for each of the one or more requested segments, calculating a difference between the sending time-point and the receiving time-point corresponding to the requested segment;

updating an average according to the one or more differences corresponding to the one or more requested segments; and

selectively adjusting the first scheduling window according to the average.

3. The stream sharing method according to claim 2, wherein when the average is smaller than a lower bound, the first scheduling window is selectively increased, and when the average is larger than an upper bound, the first scheduling window is selectively decreased.

4. The stream sharing method according to claim 3, wherein when the average is smaller than the lower bound and the first scheduling window is smaller than a maximum size, the first scheduling window is increased, and when the average is larger than the upper bound and the first scheduling window is larger than a minimum size, the first scheduling window is decreased.

5. The stream sharing method according to claim 4, wherein when the average is neither smaller than the lower bound nor larger than the upper bound, or when the average is smaller than the lower bound and the first scheduling window has reached the maximum size, or when the average is larger than the upper bound and the first scheduling window has reached the minimum size, the first scheduling window is preserved.

6. The stream sharing method according to claim 3, wherein the average has an initial value related to the size of the buffer module.

7. A stream sharing apparatus, comprising:

a buffer module;

a sharing module configured to receive a stream according to a first scheduling window, to store a plurality of received segments of the stream in the buffer module, to receive a sharing request comprising a second scheduling window, and to send one or more requested segments according to the second scheduling window, wherein each of the received segments corresponds to a receiving time-point, and each of the one or more requested segments is one of the received segments and further corresponds to a sending time-point; and

an adjusting module configured to selectively adjust the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one or more requested segments.

8. The stream sharing apparatus according to claim 7, wherein when the adjusting module selectively adjusts the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one or more requested segments, the adjusting module calculates, for each of the one or more requested segments, a difference of the receiving time-point and the sending time-point corresponding to the requested segment, updates an average according to the one or more differences corresponding to the one or more requested segments, and selectively adjusts the first scheduling window according to the average.

9. The stream sharing apparatus according to claim 8, wherein the adjusting module is configured to selectively increase the first scheduling window when the average is smaller than a lower bound, and to selectively decrease the first scheduling window when the average is larger than an upper bound.

10. The stream sharing apparatus according to claim 9, wherein when the average is smaller than the lower bound and the first scheduling window is smaller than a maximum size, the adjusting module increases the first scheduling window, and when the average is larger than the upper bound and the first scheduling window is larger than a minimum size, the adjusting module decreases the first scheduling window.

11. The stream sharing apparatus according to claim 10, wherein when the average is neither smaller than the lower bound nor larger than the upper bound, or when the average is smaller than the lower bound and the first scheduling window has reached the maximum size, or when the average is larger than the upper bound and the first scheduling window has reached the minimum size, the adjusting module preserves the first scheduling window.

12. The stream sharing apparatus according to claim 9, wherein the average has an initial value related to the size of the buffer module.

13. A stream sharing system, comprising:

a stream source apparatus configured to host a stream; and

a first stream sharing apparatus comprising;

a buffer module;

a sharing module configured to receive the stream from the stream source apparatus or a second stream sharing apparatus according to a first scheduling window, to store a plurality of received segments of the stream in the buffer module, to receive from a third stream sharing apparatus a sharing request comprising a second scheduling window, and to send one or more requested segments to the third stream sharing apparatus according to the second scheduling window, wherein each of the received segments corresponds to a receiving time-point, and each of the one or more requested segments is one of the received segments and further corresponds to a sending time-point; and

an adjusting module configured to selectively adjust the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one ore more requested segments.

14. The stream sharing system according to claim 13, wherein when the adjusting module selectively adjusts the first scheduling window according to the receiving time-point and the sending time-point corresponding to each of the one or more requested segments, the adjusting module calculates, for each of the one or more requested segments, a difference of the receiving time-point and the sending time-point corresponding to the requested segment, updates an average according to the one or more differences corresponding to the one or more requested segments, and selectively adjusts the first scheduling window according to the average.

15. The stream sharing system according to claim 14, wherein the adjusting module is configured to selectively increase the first scheduling window when the average is smaller than a lower bound, and to selectively decrease the first scheduling window when the average is larger than an upper bound.

16. The stream sharing system according to claim 15, wherein when the average is smaller than the lower bound and the first scheduling window is smaller than a maximum size, the adjusting module increases the first scheduling window, and when the average is larger than the upper bound and the first scheduling window is larger than a minimum size, the adjusting module decreases the first scheduling window.

17. The stream sharing system according to claim 16, wherein when the average is neither smaller than the lower bound nor larger than the upper bound, or when the average is smaller than the lower bound and the first scheduling window has reached the maximum size, or when the average is larger than the upper bound and the first scheduling window has reached the minimum size, the adjusting module preserves the first scheduling window.

18. The stream sharing system according to claim 15, wherein the average has an initial value related to the size of the buffer module.