Method and device for processing data packets

• US 10,791,204 B2
• Filed: 04/05/2018
• Issued: 09/29/2020
• Est. Priority Date: 06/25/2009
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Staring, Antonius Adriaan Maria, van Wageningen, Andries
• Primary Examiner(s): Ohri, Romani
• Application Number:
  US15/946,007
• Publication Number:
  US 20180227398A1
• Time in Patent Office: 908 Days
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/26 Special purpose or proprietary protocols or architectures network applications for proprietary or special purpose networking environments H04L67/12

Abstract

A method of encoding data packet by encoding type information and size information of the data packet into the same field. The data packet comprises a header part and a message part. The header part comprises at least one bit for indicating the type of the data packet, where the method includes obtaining the size information of the data packet based on the at least one bit.

Claims

1. A method of processing a data packet, the method comprising:

determining size information of a message part of the data packet,

wherein the size information is determined according to the following mathematical relationship;

S=(Y+(X−

Z)/Q),

wherein S is the size of the data packet, X is a value of a header part of the data packet, Y is an integer value, Z is an integer value, and Q is an integer value, and

wherein the header part comprises at least one bit, the at least one bit indicating a type of the data packet, and

wherein Q has a value that is greater than or equal to 4, Y has a value that is greater than or equal to 1, and Z has a value that is greater than or equal to 0.

2. The method of claim 1, further comprising:

identifying the message part from the data packet according to the obtained size information.

3. The method of claim 2, wherein the data packet further comprises a checksum part indicating a first value,

the method further comprising:

calculating a second value according to the identified message part; and

determining whether the data packet is correct or not by comparing the second value with the first value.

4. The method of claim 3, wherein the calculating includes calculating the second value according to an exclusive-or algorithm.

5. The method of claim 3, further comprising discarding the data packet when the data packet is determined to be incorrect.

6. The method of claim 1, wherein the data packet is associated with an unknown packet type according to the at least one bit.

7. The method of claim 3, further comprising:

transmitting power inductively to a device;

receiving the data packet from the device,

wherein the data packet is associated with an unknown packet type according to the at least one bit,

wherein the data packet is received from the device by a modulating of the power drawn from a transmitter,

wherein the transmitter transmits the power inductively to the device; and

aborting the transmitting of power to the device if the data packet is determined as incorrect.

8. A non-transitory computer-readable medium having one or more executable instructions stored thereon, which when the instructions are executed by a processor, cause the processor to perform the method of claim 1.

9. The method of claim 1, wherein Y is an integer in the range of 1 to 20, Z is an integer in the range of 0 to 224, and Q is an integer in the range of 4-32.

10. The method of claim 1, wherein Y, Z, and Q have different values for corresponding different ranges of the value of X.

20. A method of claim 1, wherein the processing of the data packet includes processing a data packet in an inductive wireless power transmission system.

11. A wireless power transfer device for processing a data packet, the wireless power transfer device comprising:

wireless power circuitry; and

processor circuitry configured to determine size information of a message part of the data packet according to the following mathematical relationship;

S=(Y+(X−

Z)/Q),

wherein S is the size of the data packet, X is a value of a header part of the data packet, Y is an integer value, Z is an integer value, and Q is an integer value, and

wherein the header part comprises at least one bit, the at least one bit indicating a type of the data packet, and

wherein Q has a value that is greater than or equal to 4, Y has a value that is greater than or equal to 1, and Z has a value that is greater than or equal to 0.

12. The wireless power transfer device of claim 11, wherein the processor circuitry is further configured to identify the message part from the data packet according to the obtained size information.

13. The wireless power transfer device of claim 12, wherein the data packet further comprises a checksum part indicating a first value,

the processor circuitry is further configured to:

calculate a second value according to the identified message part; and

determine whether the data packet is correct or not by comparing the second value with the first value.

14. The wireless power transfer device of claim 13, wherein the processor circuitry is further configured to discard the data packet if the processor circuitry determines that the data packet is incorrect.

15. The wireless power transfer device of claim 14,

wherein the data packet is received from a receiver and is associated with an unknown packet type according to the at least one bit,

wherein the wireless power circuitry is configured to inductively transmits wireless power to the receiver,

wherein the receiver sends the data packet by modulating the power drawn from the transmitter, and

wherein the processor circuitry is configured to abort the transmission of power to the receiver if the processor circuitry determines that the data packet is incorrect.

16. The wireless power transfer device of claim 11, wherein Y is an integer in the range of 1 to 20, Z is an integer in the range of 0 to 224, and Q is an integer in the range of 4-32.

17. The wireless power transfer device of claim 11, wherein Y, Z, and Q have different values for corresponding different ranges of the value of X.

18. An encoder for encoding a data packet, the encoder comprising:

circuitry configured to assemble the data packet, the data packet comprising a header part and a message part, the header part comprising at least one bit,

wherein the at least one bit indicates a type of the data packet,

wherein the at least one bit is associated with size information of the message part of the data packet such that the size information can be determined according to the following mathematical relationship;

S=(Y+(X−

Z)/Q),

wherein S is the size of the data packet, X is a value of a header part of the data packet, Y is an integer value, Z is an integer value, and Q is an integer value, and

wherein Q has a value that is greater than or equal to 4, Y has a value that is greater than or equal to 1, and Z has a value that is greater than or equal to 0.

19. The encoder of claim 18 comprised in a device configured to receive inductively transmitted power, wherein the device is configured to transmit the data packet by modulating inductive power.

21. The encoder of claim 18, wherein Y is an integer in the range of 1 to 20, Z is an integer in the range of 0 to 224, and Q is an integer in the range of 4-32.

22. The encoder of claim 18, wherein Y, Z, and Q have different values for corresponding different ranges of the value of X.