High data rate interface with improved link synchronization

• US 8,687,658 B2
• Filed: 11/24/2004
• Issued: 04/01/2014
• Est. Priority Date: 11/25/2003
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Anderson, Jon James, Steele, Brian, Wiley, George Alan, Shekhar, Shashank
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Shand, Roberta A
• Application Number:
  US10/997,838
• Publication Number:
  US 20050163116A1
• Time in Patent Office: 3,415 Days
• Field of Search: 370/503, 370/509, 370/520, 455/456.1, 455/502, 709/227
• US Class Current: 370/509
• 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 67/01 Protocols
• 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: H04M 1/72409 by interfacing with external accessories hands-free H04M1/60
• CPC Class Codes: H04M 1/724097 Worn on the head
• 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 interface provides a cost-effective, low power, bi-directional, high-speed data transfer mechanism over a short-range “serial” type data link, which lends itself to implementation with miniature connectors and thin flexible cables which are especially useful in connecting display elements such as wearable micro-displays to portable computers and wireless communication devices.

Claims

1. A method of verifying link synchronization in a mobile display digital interface (MDDI) communication system, the method comprising the steps of:

sending a round trip delay measurement packet from a host to a client; and

searching for a predetermined response from the client to the sent round trip delay measurement packet to verify the link synchronization and to notify the host when to expect packet data to start within a reverse encapsulation packet, wherein the predetermined response comprises a single pulse response transmitted within a packet interval.

2. The method of claim 1 wherein the predetermined response comprises a correct response.

3. The method of claim 2 further comprising the step of proceeding with a hibernation process.

4. The method of claim 1 wherein the step of searching comprises determining whether the client has incorrectly responded to the round trip delay measurement packet.

5. The method of claim 4 further comprising the step of initiating a resynchronization process.

6. The method of claim 4 further comprising the step of resending the round trip delay measurement packet.

7. The method of claim 6 further comprising the step of the host reducing a reverse data rate.

8. The method of claim 4 wherein the incorrect response comprises no response.

9. A system for verifying link synchronization in a mobile display digital interface (MDDI) communication system, the system comprising:

means for sending a round trip delay measurement packet from a host to a client; and

means for searching for a predetermined response from the client to the sent round trip delay measurement packet to verify the link synchronization and to notify the host when to expect packet data to start within a reverse encapsulation packet, wherein the predetermined response comprises a single pulse response transmitted within a packet interval.

10. The system of claim 9 wherein the predetermined response comprises a correct response.

11. The system of claim 10 further comprising a means for proceeding with a hibernation process.

12. The system of claim 9 wherein the means for searching comprises a means for determining whether the client has responded incorrectly to the round trip delay measurement packet.

13. The system of claim 12 further comprising a means for initiating a resynchronization process.

14. The system of claim 12 further comprising a means for resending the round trip delay measurement packet.

15. The system of claim 14 further comprising a means reducing a reverse data rate by the host.

16. The system of claim 12 wherein the incorrect response comprises no response.

17. A non-transitory storage media comprising program instructions which are hardware computer-executable to implement a verification of link synchronization in a mobile display digital interface (MDDI) communication system, the storage media comprising;

program instructions that cause a round trip delay measurement packet to be sent from a host to a client; and

program instructions that cause a predetermined response be searched from the client to the sent round trip delay measurement packet to verify the link synchronization and to notify the host when to expect packet data to start within a reverse encapsulation packet, wherein the predetermined response comprises a single pulse response transmitted within a packet interval.

18. The storage media of claim 17 wherein the predetermined response comprises a correct response.

19. The storage media of claim 18 further comprising code for causing a hibernation process to proceed.

20. The storage media of claim 17 wherein the code for causing a predetermined response be searched comprises code for causing a determination of whether the client has responded incorrectly to the round trip delay measurement packet.

21. The storage media of claim 20 further comprising code for causing a resynchronization process initiation.

22. The storage media of claim 20 further comprising code for causing the round trip delay measurement packet to be resent.

23. The storage media of claim 22 further comprising code for causing a reduction of a reverse data rate by the host.

24. The storage media of claim 20 wherein the incorrect response correctly comprises no response.