Multiplexed Data Stream Timeslot Map

• US 20080075123A1
• Filed: 04/16/2007
• Published: 03/27/2008
• Est. Priority Date: 09/25/2006
• Status: Active Grant

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Fourcand, Serge Francois
• Granted Patent: US 7,961,751 B2
• Time in Patent Office: Days
• US Class Current: 370/503
• CPC Class Codes: H04J 3/1611 Synchronous digital hierarchy [SDH] or SONET H04J3/1664 takes precedence for interactions with OTN
• CPC Class Codes: H04J 3/1682 Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
• CPC Class Codes: H04J 3/22 in which the sources have different rates or codes simultaneous speech and digital data or video transmission H04M11/06; see provisional also H04J3/16
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]

Abstract

A network component comprising a processor configured to implement a method comprising promoting the communication of a frame within a synchronization window, wherein the frame comprises a plurality of data types assigned to a plurality of timeslots, and a timeslot map indicating the data type assigned to each timeslot. Also disclosed is a method comprising receiving a data stream comprising a data structure comprising a plurality of timeslots, each timeslot carrying one of a plurality of data types, receiving a timeslot map indicating the data types assigned to each of the timeslots, and processing each timeslot in accordance with the timeslot map.

Claims

1. A network component comprising:

a processor configured to implement a method comprising;

promoting the communication of a frame within a synchronization window, wherein the frame comprises;

a plurality of data types assigned to a plurality of timeslots; and

a timeslot map indicating the data type assigned to each timeslot.

2. The network component of claim 1, wherein the timeslots are octets.

3. The network component of claim 1, wherein the timeslot map comprises a plurality of bits that indicate the assignment of each timeslot.

4. The network component of claim 3, wherein the bits indicate whether each of the timeslots is assigned to a high priority data type or a low priority data type.

5. The network component of claim 4, wherein the data types comprise three data types, and wherein the bits indicate the data type to which each of the timeslots is assigned.

6. The network component of claim 5, wherein the three data types comprise best-effort packet data, telephonic voice data, and high performance flow data.

7. The network component of claim 1, wherein each of the data types have different priorities.

8. The network component of claim 1, wherein the method further comprises:

communicating one of the data types in the timeslots prior to or subsequent to the frame, wherein the timeslot map does not indicate an assignment of each of the timeslots prior to or subsequent to the frame.

9. The network component of claim 1, wherein the synchronization window has a period of about 125 microseconds, and wherein each of the timeslots provide about 64 kilobits per second of bandwidth.

10. A method comprising:

receiving a data stream comprising a data structure comprising a plurality of timeslots, each timeslot carrying one of a plurality of data types;

receiving a timeslot map indicating the data types assigned to each of the timeslots; and

processing each timeslot in accordance with the timeslot map.

11. The method of claim 10, wherein the timeslot map is received prior to the data structure.

12. The method of claim 10, further comprising correlating each timeslot with the timeslot map as the timeslot is received, thereby determining the data type carried by each timeslot.

13. The method of claim 10, wherein the data stream is received within a synchronization window having a period of about 125 microseconds, and wherein each timeslot comprises about eight bits of data.

14. The method of claim 10, wherein the data types comprise a high priority data and a low priority data, and wherein the processing comprises buffering the data carried by each timeslot assigned to the low priority data.

15. The method of claim 10 wherein the data structure is a SONET or SDH frame comprising a plurality of columns, and wherein each column comprises the timeslot.

16. A system comprising:

an upstream node in communication with a downstream node,

wherein the upstream node transmits a data stream within a plurality of windows synchronized between the upstream node and the downstream node,

wherein the data stream comprises a payload of timeslots, each timeslot assigned to carry one of a plurality of data types, and

wherein the data stream further comprises a timeslot map indicating the assignment of each of the timeslots in the payload.

17. The system of claim 16, wherein the downstream node receives the data stream and determines which of the data types each timeslot is assigned to using the timeslot map.

18. The system of claim 16, wherein the plurality of data types comprise at least one of high priority data, time divisional multiplexed (TDM) data, high performance flow (HPF) data, telephonic voice data, real-time data, audio data, video data, or multimedia data, and wherein the plurality of data types further comprise at least one of low priority data, best-effort packet data, or Ethernet packet data.

19. The system of claim 16, wherein the windows have a period of about 125 microseconds and each timeslot comprises about eight bits of data.

20. The system of claim 16, wherein the timeslot map comprises at least about two bits for each of the timeslots, wherein the data types comprise about three data types, and wherein the bits indicate each of the timeslots as being assigned to one of the data types.