Method, system and computer program for driving a data signal in data interface communication data link

• US 8,606,946 B2
• Filed: 11/12/2004
• Issued: 12/10/2013
• Est. Priority Date: 11/12/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Anderson, Jon James, Steele, Brian, Wiley, George Alan, Shekhar, Shashank
• Primary Examiner(s): Harrell, Robert B
• Application Number:
  US10/987,123
• Publication Number:
  US 20050135390A1
• Time in Patent Office: 3,315 Days
• Field of Search: 709/230
• US Class Current: 709/230
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/61 for supporting one-way streaming services, e.g. Internet radio
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/12 Protocol engines
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A data Interface for transferring digital data between a host and a client over a communication path using packet structures linked together to form a communication protocol for communicating a pre-selected set of digital control and presentation data. The signal protocol is used by link controllers configured to generate, transmit, and receive packets forming the communications protocol, and to form digital data into one or more types of data packets, with at least one residing in the host device and being coupled to the client through the communications path. The data interface includes a system, method and computer program for driving a data signal to a logic one state for a first predetermined range of strobe signals and then driving the data signal to a logic zero state for a second predetermined range of strobe cycles for starting up a digital data interface communication data link from hibernation.

Claims

1. A method stored on a computer hardware readable storage medium of starting up a digital data interface communication data link, the method comprising:

driving a data signal to a logic one state for a first predetermined range of only strobe cycles, the first predetermined range of strobe cycles comprising counting a first predetermined number of strobe cycles independent of a time measuring system in a client;

driving the data signal to a logic zero state for a second predetermined range of only strobe cycles to start up the digital data interface communication link, the second predetermined range of strobe cycles comprising counting a second predetermined number of strobe cycles independent of the time measuring system in the client; and

transmitting a sub-frame header packet.

2. The method of claim 1 wherein the data signal consists of a differential pair.

3. The method of claim 1 wherein the first predetermined range of strobe cycles comprises between one hundred and forty (140) strobe cycles and one hundred and sixty (160) strobe cycles.

4. The method of claim 1 wherein the second predetermined range of strobe cycles comprises between forty (40) strobe cycles and sixty (60) strobe cycles.

5. A hardware system for starting up a digital data interface communication data link, the system comprising:

means for driving a data signal to a logic one state for a first predetermined range of only strobe cycles, the first predetermined range of strobe cycles comprising counting a first predetermined number of strobe cycles independent of a time measuring system in a client;

means for driving the data signal to a logic zero state for a second predetermined range of only strobe cycles to start up the digital data interface communication link, the second predetermined range of strobe cycles comprising counting a second predetermined number of strobe cycles independent of the time measuring system in the client; and

means for transmitting a sub-frame header packet.

6. The hardware system of claim 5 wherein the data signal consists of a differential pair.

7. The hardware system of claim 5 wherein the first predetermined range of strobe cycles comprises between one hundred and forty (140) strobe cycles and one hundred and sixty (160) strobe cycles.

8. The hardware system of claim 5 wherein the second predetermined range of strobe cycles comprises between forty (40) strobe cycles and sixty (60) strobe cycles.

9. A computer program product embodied on a computer readable hardware storage medium, comprising:

code for causing a digital data interface communication data link to start up, the computer code comprising;

code for causing a data signal to be driven to a logic one state for a first predetermined range of only strobe cycles, the first predetermined range of strobe cycles comprising counting a first predetermined number of strobe cycles independent of a time measuring system in a client;

code for causing the data signal to be driven to a logic zero state for a second predetermined range of only strobe cycles to start up the digital data interface communication link, the second predetermined range of strobe cycles comprising counting a second predetermined number of strobe cycles independent of the time measuring system in the client; and

code for causing a sub-frame header packet to be transmitted.

10. The computer program product of claim 9 wherein the data signal consists of a differential pair.

11. The computer program product of claim 9 wherein the first predetermined range of strobe cycles comprises between one hundred and forty (140) strobe cycles and one hundred and sixty (160) strobe cycles.

12. The computer program product of claim 9 wherein the second predetermined range of strobe cycles comprises between forty (40) strobe cycles and sixty (60) strobe cycles.

13. An apparatus for starting up a digital data interface communication data link, comprising:

a host configured to;

drive a data signal to a logic one state for a first predetermined range of only strobe cycles, the first predetermined range of strobe cycles comprising counting a first predetermined number of strobe cycles independent of a time measuring system in a client;

drive the data signal to a logic zero state for a second predetermined range of only strobe cycles to start up the digital data interface communication link, the second predetermined range of strobe cycles comprising counting a second predetermined number of strobe cycles independent of the time measuring system in the client; and

transmit a sub-frame header packet.

14. The apparatus of claim 13 wherein the data signal consists of a differential pair.

15. The apparatus of claim 13 wherein the first predetermined range of strobe cycles comprises between one hundred and forty (140) strobe cycles and one hundred and sixty (160) strobe cycles.

16. The apparatus of claim 13 wherein the second predetermined range of strobe cycles comprises between forty (40) strobe cycles and sixty (60) strobe cycles.