Method for providing dynamic adjustment of frame encoding parameters in a frame-based communications network

• US 7,822,005 B2
• Filed: 04/14/2008
• Issued: 10/26/2010
• Est. Priority Date: 04/07/2000
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ptasinski, Henry S., Mallory, Tracy D., Trachewsky, Jason Alexander
• Primary Examiner(s): Kumar; Pankaj
• Assistant Examiner(s): Mais; Mark A
• Application Number:
  US12/102,634
• Publication Number:
  US 20090046593A1
• Time in Patent Office: 925 Days
• Field of Search: 370/230, 370/232, 370/235, 370/238, 370/310, 370/338, 370/349, 370/389, 370/392, 370352-356, 370/395.21, 370/400, 370/395.41, 370/401, 370/395.42, 370/412, 370464-466, 370/468, 370/470, 370/472, 370/474, 370/475, 370/477, 370/510, 375/224, 375/225, 375/229, 375/316, 375/332, 375/340, 375/377, 714/48, 714/798, 714/799
• US Class Current: 370/338
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0005 applied to payload information
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004
• CPC Class Codes: H04L 1/1883 using multiple timers
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/4013 Management of data rate on the bus systems modifying transmission characteristics according to link quality H04L1/0001
• CPC Class Codes: H04L 12/40136 Nodes adapting their rate to the physical link properties LAN switches H04L49/351
• CPC Class Codes: H04L 12/40156 by using dedicated slots associated with a priority level
• CPC Class Codes: H04L 12/40163 by assigning priority to messages according to a message field
• CPC Class Codes: H04L 12/403 : with centralised control, e.g. polling
• CPC Class Codes: H04L 12/4035 : in which slots of a TDMA packet structure are assigned based on a contention resolution carried out at a master unit TDM/TDMA multiplex systems per se H04J3/1694; hybrid switching systems H04L12/64
• CPC Class Codes: H04L 12/407 : with decentralised control
• CPC Class Codes: H04L 12/413 : with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 12/417 : with deterministic access, e.g. token passing
• CPC Class Codes: H04L 2001/0093 : Point-to-multipoint
• CPC Class Codes: H04L 2001/125 : Arrangements for preventing errors in the return channel
• CPC Class Codes: H04M 11/00 : Telephonic communication systems specially adapted for combination with other electrical systems
• CPC Class Codes: H04M 11/06 : Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: Y02D 30/50 : in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Methods and apparatus for data communication are disclosed. An example method includes encoding a first plurality of transmitting frames, where a header segment of each frame is encoded in accordance with a fixed set of header encoding parameters and a payload segment of each frame is encoded in accordance with a first set of a variable set of payload encoding parameters. The example method also includes transmitting the first plurality of transmitting frames to a receiving station and receiving a request from the receiving station to change the first set of payload encoding parameters to a second set of the variable set of payload encoding parameters. The example method further includes selecting the second set of payload encoding parameters based on the request and encoding a second plurality of transmitting frames, where a header segment of each frame of the second plurality of transmitting frames is encoded in accordance with the fixed set of header encoding parameters and a payload segment of each frame of the second plurality of transmitting frames is encoded in accordance with the second set of payload encoding parameters. The example method still further includes transmitting the second plurality of transmitting frames to the receiving station.

Claims

1. A method comprising:

receiving, at a receiving station, a first plurality of transmitting frames, each of the first plurality of transmitting frames including;

a header segment encoded using a fixed set of header encoding parameters; and

a payload segment encoded using a first set of a variable set of payload encoding parameters;

decoding the header segments of the first plurality of transmitting frames in accordance with the fixed set of header encoding parameters;

decoding the payload segments of the first plurality of transmitting frames in accordance with the first set of the variable set of payload encoding parameters;

measuring and tracking performance of the decoding of the payload segments of the first plurality of transmitting frames, the measuring and tracking being based on errors detected during the decoding of the payload segments of the first plurality of transmitting frames;

determining network performance improvement characteristics based on the measuring and tracking; and

providing, from the receiving station to a transmitting station of the transmitting frames, an indication of a request to change the first set of the variable set payload encoding parameters to a second set of the variable set of payload encoding parameters based on the network performance improvement characteristics.

2. The method of claim 1, further comprising:

receiving, at the receiving station, a second plurality of transmitting frames, each of the second plurality of transmitting frames including;

a header segment encoded using the fixed set of header encoding parameters; and

a payload segment encoded using the second set of the variable set of payload encoding parameters;

decoding the header segments of the second plurality of transmitting frames in

accordance with the fixed set of header encoding parameters; and

decoding the payload segments of the second plurality of transmitting frames in accordance with the second set of the variable set of payload encoding parameters.

3. The method of claim 1, wherein the indicating includes the receiving station transmitting a rate request control frame to the transmitting station, the rate request control frame indicating desired payload encoding parameters, the desired payload encoding parameters being included in a payload segment of the rate request control frame.

4. The method of claim 1, wherein the fixed set of header encoding parameters indicates a base rate at which all stations in a particular network are capable of receiving and decoding the first plurality of transmitting frames.

5. The method of claim 1, wherein the first set of the variable set of payload encoding parameters is selected from a plurality of sets of payload encoding parameters.

6. The method of claim 1, further comprising limiting a number of rate request control frames transmitted during a given time interval.

7. The method of claim 1, wherein the transmitting station transmits a rate request control frame in response to the receiving station receiving at least one transmitting frame encoded with a set of payload encoding parameters that do not match a preferred set of payload encoding parameters for the receiving station.

8. The method of claim 7, wherein the transmitting station transmits the rate request control frame based on a function of a number of non-matching frames, the function being an exponential backoff with an upper limit on a range of the binary exponential backoff.

9. The method of claim 1, further comprising the receiving station periodically transmitting a rate request control frame to the transmitting station, the rate request control frame indicating desired payload encoding parameters, the desired payload encoding parameters being included in a payload segment of the rate request control frame.

10. A method comprising:

transmitting, from a transmitting station to a receiving station, a first plurality of transmitting frames, each of the first plurality of transmitting frames including;

a header segment encoded using a fixed set of header encoding parameters; and

a payload segment encoded using a first set of a variable set of payload encoding parameters;

receiving, at the transmitting station, a request from the receiving station to change the first set of the variable set payload encoding parameters to a second set of the variable set of payload encoding parameters; and

transmitting, from the transmitting station to the receiving station, a second plurality of transmitting frames, each of the second plurality of transmitting frames including;

a header segment encoded using a fixed set of header encoding parameters; and

a payload segment encoded using the second set of a variable set of payload encoding parameters.

11. The method of claim 10, wherein the request comprises a rate request control frame, the rate request control frame including new payload encoding parameters in a payload segment of the rate request control frame

12. The method of claim 11, wherein the payload segment of the rate request control frame is decoded using the fixed set of encoding parameters.

13. The method of claim 11, further comprising limiting a number of rate request control frames sent during a given time interval.

14. The method of claim 10, wherein the fixed set of encoding parameters is indicative of a base rate by which all stations in a network including the transmitting station can receive and decode the transmitting frames with a least likelihood of errors.

15. The method of claim 10, wherein the request is received in response to transmission of a transmitting frame by the transmitting station encoded with payload encoding parameters that do not match preferred payload encoding parameters of the receiving station.

16. A method comprising:

encoding a first plurality of transmitting frames, wherein a header segment of each frame of the first plurality of transmitting frames is encoded in accordance with a fixed set of header encoding parameters and a payload segment of each frame of the first plurality of transmitting frames is encoded in accordance with a first set of a variable set of payload encoding parameters;

transmitting the first plurality of transmitting frames to a receiving station;

receiving a request from the receiving station to change the first set of the variable set payload encoding parameters to a second set of the variable set of payload encoding parameters;

selecting the second set of the variable set of payload encoding parameters based on the request;

encoding a second plurality of transmitting frames, wherein a header segment of each frame of the second plurality of transmitting frames is encoded in accordance with the fixed set of header encoding parameters and a payload segment of each frame of the second plurality of transmitting frames is encoded in accordance with the second set of the variable set of payload encoding parameters; and

transmitting the second plurality of transmitting frames to the receiving station.

17. The method of claim 16, wherein the second set of the variable set of payload encoding parameters included in the request may include parameters that may not be useable by a transmitting station receiving the request.

18. The method of claim 16, wherein selecting the second set of the variable set of payload encoding parameters includes selecting the second set of the variable set of payload encoding parameters based on the request and capabilities of a transmitting station receiving the request.

19. The method of claim 16, wherein the first and second sets of the variable set of payload encoding parameters are selected from a plurality of sets of encoding parameters.

20. The method of claim 19, wherein each set of payload encoding parameters of the plurality of sets of payload encoding parameters control a number of bits transmitted per symbol.