Method and apparatus for a scheduler for a macro-diversity portion of a transmission

• US 7,903,604 B2
• Filed: 11/01/2007
• Issued: 03/08/2011
• Est. Priority Date: 04/18/2007
• Status: Active Grant

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: Wi-LAN Inc.
• Inventors: Zahedi, Sina, Ju, Huei-jiun (Laura), Govind, Keerthi S., Connors, Dennis P.
• Primary Examiner(s): Phunkulh; Bob A
• Application Number:
  US11/933,987
• Publication Number:
  US 20080259878A1
• Time in Patent Office: 1,223 Days
• Field of Search: None
• US Class Current: 370/328
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method, apparatuses, and system of broadcasting content data in a macro-diversity region of a data frame includes receiving a stream of transport packets. Selecting at least one burst size, from amongst a set of a plurality of predetermined burst sizes. Allocating one or more data bursts with the selected burst size to the macro-diversity region of the data frame, each data burst comprising at least a portion of the received transport packets and wherein the at least one burst size is selected so as to minimize a number of data bursts allocated to the macro-diversity region. Then communicating the allocation of data bursts to a transmitter that includes the allocation of data bursts in the macro-diversity region of a data frame transmitted by the transmitter.

Claims

1. A method of transmitting content data in a macro-diversity region of a data frame, the method comprising:

receiving a stream of transport packets;

selecting a burst size from a plurality of predetermined burst sizes;

allocating a data burst having the selected burst size to the macro-diversity region of the data frame, wherein the data burst includes at least a portion of the received stream of transport packets, and wherein the burst size is selected such that a number of data bursts allocated to the macro-diversity region is minimized;

communicating information to a base station for transmitting a first signal including the data frame from a first transmitter, wherein the information indicates the allocation of the data burst to the macro-diversity region.

2. The method of claim 1, further comprising:

transmitting from a second transmitter a second signal including the data frame, such that the first signal and the second signal are synchronized.

3. The method of claim 2, wherein the macro-diversity region of the data frames of the first signal and the second signal comprises identical data packets.

4. The method of claim 1, wherein the selecting a burst size comprises selecting a largest burst size.

5. The method of claim 1, wherein the plurality of predetermined burst sizes comprises a 4800 bit burst size, a 3840 bit burst size, a 2800 bit burst size, a 1920 bit burst size, a 960 bit burst size, a 480 bit burst size, a 384 bit burst size, a 288 bit burst size, a 192 bit burst size, or a 144 bit burst size.

6. The method of claim 1, further comprising:

selecting a burst size from the plurality of predetermined burst sizes such that the selected burst size is the largest burst size of the plurality of predetermined burst sizes that is smaller than or equal to a size of a remaining portion available in the macro-diversity region;

updating the size of the remaining portion available in the macro-diversity region based on the selected burst size;

on a condition that the size of the remaining portion available in the macro-diversity region is equal to or larger than a smallest burst size of the plurality of predetermined burst sizes, repeating the selecting and the updating.

7. The method of claim 6, wherein when the size of the remaining portion available in the macro-diversity region is smaller than a smallest burst size of the plurality of burst sizes, the remaining portion available in the macro-diversity region is left empty or filled with null packets.

8. The method of claim 1, wherein the information regarding the allocation of the data burst to the macro-diversity region comprises information regarding the allocation of a data burst in a previous macro-diversity region.

9. The method of claim 1, further comprising:

allocating a map to the macro-diversity region; and

updating the map when data bursts are allocated to the macro-diversity region.

10. A method of transmitting a macro-diversity region in an OFDMA system, the method comprising:

identifying a plurality of sub-channels;

assigning a plurality of symbols to the plurality of sub-channels, wherein each symbol of the plurality of symbols is assigned to a different one of the plurality of sub-channels during a symbol period;

identifying a plurality of sub-channels and a plurality of symbol periods, wherein a symbol period comprises a plurality of symbols, and wherein during the symbol period each symbol of the plurality of symbols is associated with a different one of the plurality of sub-channels;

generating a first map, wherein the first map includes information that describes a data burst and a size of a second map, and wherein the second map is transmitted in a subsequent macro-diversity region;

transmitting the map from a transmitter via a first sub-channel during the symbol period; and

transmitting the data burst from the transmitter via a second sub-channel during the symbol period.

11. The method of claim 10, wherein each sub-channel of the plurality of sub-channels includes a carrier frequency, wherein the carrier frequency is orthogonal to a carrier frequency of each of the other sub-channels of the plurality of sub-channels.

12. The method of claim 10, wherein the information is used to identify a first data burst in the subsequent macro-diversity region.

13. The method of claim 10, comprising:

transmitting the map in a first symbol period of the macro-diversity region.

14. A method of transmitting content data in a macro-diversity region of a data frame, the method comprising:

encapsulating a plurality of transport packets, wherein the plurality of transport packets includes content data;

selecting a burst size from a plurality of predetermined burst sizes; and

allocating a data burst having the selected burst size to the macro-diversity region of the data frame, wherein the data burst includes at least a portion of the encapsulated plurality of transport packets, and wherein the burst size is selected such that a number of data bursts allocated to the macro-diversity region is minimized; and

transmitting from a first and a second transmitter a signal including the data frame, such that the signals transmitted from the first and second transmitter are synchronized.

15. The method of claim 14, further comprising:

receiving a plurality of data packets, wherein the plurality of data packets includes content data; and

wherein the encapsulating a plurality of transport packets includes encapsulating at least a portion of the content data into an MPEG-2 transport packets.

16. A scheduler comprising:

means for receiving a stream of transport packets;

means for selecting a burst size from a plurality of predetermined burst sizes;

means for allocating a data burst having the selected burst size to the macro-diversity region of the data frame, wherein the data burst includes at least a portion of the received stream of transport packets, and wherein the burst size is selected such that a number of data bursts allocated to the macro-diversity region is minimized;

means for communicating information to a base station for transmitting a first signal including the data frame from a first transmitter, wherein the information indicates the allocation of the data burst to the macro-diversity region.

17. The scheduler of claim 16, wherein the plurality of predetermined burst sizes comprises a 4800 bit burst size, a 3840 bit burst size, a 2800 bit burst size, a 1920 bit burst size, a 960 bit burst size, a 480 bit burst size, a 384 bit burst size, a 288 bit burst size, a 192 bit burst size, or a 144 bit burst size.

18. The scheduler of claim 16, wherein the macro-diversity region further includes a map region that identifies a locations of the data burst in the macro-diversity region.

19. A scheduler comprising:

an input configured to receives a plurality of data packets;

a processor configured to;

select a burst size from a plurality of predetermined burst sizes such that the selected burst size is the largest burst size of the plurality of predetermined burst sizes that fits within a non-allocated portion of a macro-diversity region of a data frame;

allocate a data burst having the selected burst size to the macro-diversity region of the data frame;

update a size of the non-allocated portion of the macro-diversity region based on the size of the allocated burst; and

on a condition that the size of the remaining portion available in the macro-diversity region is equal to or larger than a smallest burst size of the plurality of predetermined burst sizes, repeats the selecting, allocating, and updating; and

an output configured to communicate the allocation of data bursts to a base station.

20. The scheduler of claim 19, wherein the processor is further configured to select a burst size such that a number of data bursts allocated to the macro-diversity region is minimized.

21. The scheduler of claim 19, wherein the plurality of predetermined burst sizes comprises 4800 bit burst size, a 3840 bit burst size, a 2800 bit burst size, a 1920 bit burst size, a 960 bit burst size, a 4800 bit burst size, a 384 bit burst size, a 288 bit burst size, a 192 bit burst size, or a 144 bit burst size.

22. The scheduler of claim 19, wherein when a size of the non-allocated portion of the macro-diversity region is smaller than the smallest size of the plurality of predetermined burst sizes, the non-allocated portion of the macro-diversity region is left empty.

23. The scheduler of claim 19, wherein when a size of the non-allocated portion of the macro-diversity region is smaller than the smallest size of the plurality of predetermined burst sizes, the non-allocated portion of the macro-diversity region is filled with null packets.

24. The scheduler of claim 19, wherein the output is further configured to communicate the allocation of data bursts to a plurality of transmitters.

25. The scheduler of claim 19, wherein the output is further configured to communicates the allocation of data bursts to an access service network gateway.