Method for efficient utilization of radio resources in wireless communications system

• US 8,204,038 B2
• Filed: 01/11/2010
• Issued: 06/19/2012
• Est. Priority Date: 01/13/2009
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Wang, Chao-Chun, Yee, Chih-Shi
• Primary Examiner(s): Wong, Warner
• Application Number:
  US12/685,088
• Publication Number:
  US 20100177724A1
• Time in Patent Office: 890 Days
• Field of Search: 370310-350, 370/503, 370/522
• US Class Current: 370/350
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 65/70 Media network packetisation

Abstract

The invention provides a wireless communications system. In one embodiment, the wireless communications system comprises a coordinating communications device, a source communications device, and a sink communications device. The coordinating communications device transmits a predetermined bits sequence at the beginning of a radio frame at a rate of a first fixed interval. The source communications device receives frames of a streaming session, detects a duration and first starting time of a frame, and wherein forwards information about the duration and the first starting time of one or more of the frames to the coordinating communications device. The coordinating communications device then determines the duration of a second fixed interval and second starting time in accordance with a predetermined rule based on the information received from the source communications device. The coordinating communications device then transmits the predetermined bits sequence at the second starting time of a radio frame at a rate of the second fixed interval, and the source communications device forwards the frames to a sink communications device.

Claims

1. A wireless communications system, comprising:

a coordinating communications device, transmitting a predetermined bits sequence at the beginning of a radio frame at a rate of a first fixed interval; and

a source communications device, receiving frames of a streaming session, detecting a duration and first starting time of a frame;

wherein the source communications device forwards information about the duration and the first starting time of one or more of the frames to the coordinating communications device;

wherein the coordinating communications device determines the duration of a second fixed interval and second starting time for transmitting the predetermined bits sequence in accordance with a predetermined rule based on the information received from the source communications device;

wherein the coordinating communications device transmits the predetermined bits sequence at the second starting time of the radio frame at a rate of the second fixed interval and the source communications device forwards the frames to a sink communications device.

2. The wireless communications system as claimed in claim 1, wherein according to the predetermined rule, the coordinating communications device determines the duration of the second fixed interval to be equal to the duration of the frames.

3. The wireless communications system as claimed in claim 1, wherein according to the predetermined rule, the coordinating communications device determines the duration of the second fixed interval to be equal to a multiple of the duration of the frames.

4. The wireless communications system as claimed in claim 1, wherein according to the predetermined rule, the coordinating communications device determines the duration of the second fixed interval to be equal to a fraction of the duration of the frames.

5. The wireless communications system as claimed in claim 1, wherein the source communications device forwards the frames to the sink communications device within the boundaries of the radio frames which have the duration of the second fixed interval and the second starting time.

6. The wireless communications system as claimed in claim 1, wherein the source communications device forwards the frames in a way that each frame of the streaming session coincides in time with one of the radio frames which have the duration of the second fixed interval and the second starting time.

7. The wireless communications system as claimed in claim 1, wherein the coordinating communications device determines a timing for changing to the duration of the second fixed interval and the second starting time.

8. The wireless communications system as claimed in claim 1, wherein the frames of the streaming session are video frames.

9. The wireless communications system as claimed in claim 1, wherein the difference between the first and second starting time is less than a predetermined value.

10. A method for efficient utilization of radio resources, wherein a wireless communications system comprises a coordinating communications device, a source communications device, and a sink communications device, and the source communications device receives frames of a streaming session to be forwarded to the sink communications device, comprising:

transmitting a predetermined bits sequence at the beginning of a radio frame by the coordinating communications device at a rate of a first fixed interval;

determining duration of a second fixed interval and a second starting time for transmitting the predetermined bits sequence at the beginning of a radio frame by the coordinating communications device in accordance with a predetermined rule based on information received from the source communications device, wherein the information comprises duration and first starting time of one or more of the frames of the streaming session; and

transmitting the predetermined bits sequences by the coordinating communications device at the second starting time of each frame at a rate of the second fixed interval.

11. The method as claimed in claim 10, wherein the source communications device forwards the frames to the sink communications device within the boundaries of the radio frames having the duration of the second fixed interval and the second starting time.

12. The method as claimed in claim 10, wherein determining of the duration of the second fixed interval of the frames comprises determining the duration of the second fixed interval to be equal to the duration of each of the frames.

13. The method as claimed in claim 10, wherein determining of the duration of the second fixed interval of the frames comprises determining the duration of the second fixed interval to be equal to a multiple of the duration of each of the frames.

14. The method as claimed in claim 10, wherein determining of the duration of the second fixed interval of the frames comprises determining the duration of the second fixed interval to be equal to a fraction of the duration of each of the frames.

15. The method as claimed in claim 10, wherein the coordinating communications device determines a timing for changing to the duration of the second fixed interval and the second starting time.

16. The method as claimed in claim 10, wherein the frames of the streaming session are video frames.

17. The method as claimed in claim 10, wherein the difference between the first and second starting time is less than a predetermined value.

18. A method for efficient utilization of radio resources, wherein a wireless communications system comprises a coordinating communications device, a source communications device, and a sink communications device, and the coordinating communications device transmits a predetermined bits sequence at the beginning of each of the radio frames at a rate of a first fixed interval, the method comprising:

receiving by the source communications device frames of a streaming session;

detecting by the source communications device a duration and first starting time of the frames;

forwarding by the source communications device information about the duration and the first starting time of one or more of the frames of the streaming session to the coordinating communications device; and

after the coordinating communications device determines the duration of a second fixed interval and a second starting time for transmitting the predetermined bits sequence at the beginning of a radio frame in accordance with a predetermined rule based on the information received from the source communications device and transmits the predetermined bits sequence at the second starting time of a radio frame at a rate of the second fixed interval, forwarding the frames by the source communications device to the sink communications device in accordance with the radio frames having the duration of the second fixed interval and the second starting time.

19. The method as claimed in claim 18, wherein forwarding of the frames comprises forwarding by the source communications device each frame of the streaming session within the boundaries of one of the radio frames which has the duration of the second fixed interval and the second starting time to the sink communications device.

20. The method as claimed in claim 18, wherein according to the predetermined rule, the coordinating communications device determines the duration of the second fixed interval to be equal to the duration of each of the frames.

21. The method as claimed in claim 18, wherein according to the predetermined rule, the coordinating communications device determines the duration of the second fixed interval to be equal to a multiple of the duration of each of the frames.

22. The method as claimed in claim 18, wherein the frames of the streaming session are video frames.