SYSTEM AND METHOD FOR IMPROVED SCHEDULING FOR TIME-FREQUENCY SLICING

• US 20090109918A1
• Filed: 09/26/2008
• Published: 04/30/2009
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Nokia Corporation
• Inventors: Pekonen, Harri J., Himmanen, Heidi
• Granted Patent: US 8,208,437 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0058 Allocation criteria

Abstract

A system and method for improved scheduling for time-frequency slicing. According to various embodiments, slot allocations are made so as to guarantee time for tuning between slots. When scheduling services for multiplexes covering multiple radio frequency (RF) channels, time is provided for the receiver to tune to another radio-frequency channel between at least two of the time frequency frames. This is accomplished by arranging slots so that a service carried in a slot within the tuning time before the end of a time frequency frame k is not transmitted in a slot within the tuning time after the beginning of the next time frequency frame k+1.

Claims

1. A method, comprising:

dividing a plurality of time frequency frames into a plurality of slots, each of the plurality of time frequency frames having at least one radio-frequency channel; and

providing time for tuning to another radio-frequency channel between time frequency frames by arranging the plurality of slots so that a service carried in a particular slot within a first tuning time at a first radio-frequency before the end of a time frequency frame k is not transmitted in another slot within a second tuning time after the beginning of a next time frequency frame k+1.

2. The method of claim 1, wherein the first tuning time and the second tuning time possess identical durations.

3. The method of claim 1, wherein the first tuning time and the second tuning time possess different durations.

4. The method of claim 1, further comprising providing that, if the particular slot is the last slot in the time frequency frame k, then the first slot in the next time frequency frame k+1 shall not carry the service on the first radio-frequency.

5. The method of claim 1, wherein the method operates in a digital broadband broadcast environment.

6. A computer program product, embodied in a computer-readable medium, comprising computer code configured to perform the processes of claim 1.

7. An apparatus, comprising:

a processor; and

a memory unit communicatively connected to the processor and including;

computer code configured to divide a plurality of time frequency frames into a plurality of slots, each of the plurality of time frequency frames having at least one radio-frequency channel; and

computer code configured to provide time for tuning to another radio-frequency channel between time frequency frames by arranging the plurality of slots so that a service carried in a particular slot within a first tuning time at a first radio-frequency before the end of a time frequency frame k is not transmitted in another slot within a second tuning time after the beginning of a next time frequency frame k+1.

8. The apparatus of claim 7, wherein the first tuning time and the second tuning time possess identical durations.

9. The apparatus of claim 7, wherein the first tuning time and the second tuning time possess different durations.

10. The apparatus of claim 7, wherein the memory unit further comprises computer code configured to provide that, if the particular slot is the last slot in the time frequency frame k, then the first slot in the next time frequency frame k+1 shall not carry the service on the first radio-frequency.

11. The apparatus of claim 7, wherein the apparatus operates in a digital broadband broadcast environment.

12. An apparatus, comprising:

means for dividing a plurality of time frequency frames into a plurality of slots, each of the plurality of time frequency frames having at least one radio-frequency channel; and

means for providing time for tuning to another radio-frequency channel between time frequency frames by arranging the plurality of slots so that a service carried in a particular slot within a first tuning time at a first radio-frequency before the end of a time frequency frame k is not transmitted in another slot within a second tuning time after the beginning of a next time frequency frame k+1.

13. The apparatus of claim 12, wherein the first tuning time and the second tuning time possess identical durations.

14. The apparatus of claim 12, wherein the first tuning time and the second tuning time possess different durations.

15. The apparatus of claim 12, further comprising means for providing that, if the particular slot is the last slot in the time frequency frame k, then the first slot in the next time frequency frame k+1 shall not carry the service on the first radio-frequency.

16. The apparatus of claim 12, wherein the apparatus operates in a digital broadband broadcast environment.