COMMUNICATION SYSTEM USING MULTI-BAND SCHEDULING

• US 20100150113A1
• Filed: 06/23/2009
• Published: 06/17/2010
• Est. Priority Date: 12/17/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jang, Kyung Hun, Kim, Youngsoo, HWANG, Hyo Sun
• Granted Patent: US 8,571,568 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

A multi-band scheduling method determines frequency bands for each of a plurality of frames existing in a single session queue from among a plurality of frequency bands based on data characteristics of each of the plurality of frames. In particular, the multi-band scheduling method may assign a frame with a high significance to a frequency band having a superior channel state, thereby increasing communication reliability. Also, a broadcasting service system may use the multi-band scheduling method to effectively provide the broadcasting services.

Claims

1. A multi-band scheduling method comprising:

designating at least two frequency bands;

predicting at least one user'"'"'s channel state at each of the at least two frequency bands; and

determining a frequency band for each of a plurality of frames existing in each of at least one session queue from among the at least two frequency bands based on the at least one user'"'"'s channel state at each of the at least two frequency bands and data characteristics of each of the plurality of frames.

2. The multi-band scheduling method of claim 1, wherein the determining determines the frequency band for each of the plurality of frames based on a significance of each of the plurality of frames.

3. The multi-band scheduling method of claim 1, wherein the determining determines the frequency band for each of the plurality of frames to enable at least two frames of the plurality of frames of a single session queue to be assigned to different frequency bands.

4. The multi-band scheduling method of claim 1, further comprising:

determining a time slot in which each of the plurality of frames is transmitted.

5. The multi-band scheduling method of claim 1, wherein, when the plurality of frames include a first frame and a second frame, the at least two frequency bands include a first frequency band and a second frequency band, a significance of the first frame is higher than that of the second frame, and when a channel state in the first frequency band is superior to that in the second frequency band, the determining determines the first frequency band as a band for the first frame, and also determines the second frequency band as a band for the second frame.

6. The multi-band scheduling method of claim 1, wherein the designating designates the at least two frequency bands from frequency resources assigned for another communication system using a cognitive radio technique.

7. The multi-band scheduling method of claim 1, further comprising:

determining any one of the at least two frequency bands as a band for the plurality of frames.

8. The multi-band scheduling method of claim 1, wherein the determining determines the frequency band for each of the plurality of frames based on at least one of required quality of service (QOS) of the plurality of frames, delay of the plurality of frames, and an amount of traffic of the plurality of frames.

9. The multi-band scheduling method of claim 1, wherein the determining determines the frequency band for each of the plurality of frames based on types of the plurality of frames.

10. The multi-band scheduling method of claim 1, further comprising allocating at least two frames of the plurality of frames of a single session queue to distinct frequency bands based on the determination.

19. At least one computer-readable storage medium comprising computer readable instructions causing a computer to implement the method of claim 1.

11. A multi-band scheduling method for broadcasting services, comprising:

designating at least two frequency bands for broadcasting services; and

determining a frequency band for each of a plurality of frames included in a broadcasting data stream from among the at least two frequency bands based on characteristics of each of the plurality of frames.

12. The multi-band scheduling method of claim 11, further comprising allocating at least two frames of the plurality of frames of a single broadcasting data stream to distinct frequency bands based on the determination.

13. The multi-band scheduling method of claim 11, wherein the plurality of frames include a first frame having a high significance and a second frame having a significance lower than that of the first frame, and the determining assigns the first frame to a low frequency band and the second frame to a high frequency band, respectively.

14. The multi-band scheduling method of claim 13, wherein the first frame is an Infra frame, and the second frame is a Previous frame or a Bidirectional frame.

15. The multi-band scheduling method of claim 11, further comprising:

providing user characteristics information associated with at least one of a user'"'"'s mobility and a user'"'"'s location,

wherein the determining determines the frequency band for each of the plurality of frames based on the user characteristics information.

16. The multi-band scheduling method of claim 11, wherein the determining determines the frequency band for each of the plurality of frames based on a significance of each of the plurality of frames.

17. A method of receiving broadcasting services using multiple frequency bands, the method comprising:

receiving scheduling result information from a scheduler;

ascertaining a frequency band for each of a plurality of frames included in a broadcasting data stream based on the scheduling result information from the scheduler; and

decoding a plurality of frames received from a transmitter using an ascertained result,

wherein the scheduler determines a frequency band for each of the plurality of frames from among the at least two frequency bands based on characteristics of each of the plurality of frames included in the broadcasting data stream.

18. The method of claim 17, wherein, when the plurality of frames include a first frame having a high significance and a second frame having a significance lower than that of the first frame, and when the scheduler respectively assigns the first frame to a low frequency band and the second frame to a high frequency band, the ascertaining ascertains that a frequency band for the first frame is the low frequency band and a frequency band for the second frame is the high frequency band based on the scheduling result information.