High data rate interface apparatus and method

• US 8,730,913 B2
• Filed: 04/26/2011
• Issued: 05/20/2014
• Est. Priority Date: 03/10/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Anderson, Jon James, Steele, Brian W., Wiley, George Alan, Shekhar, Shashank
• Primary Examiner(s): Nguyen, Hanh N
• Application Number:
  US13/094,033
• Publication Number:
  US 20110199931A1
• Time in Patent Office: 1,120 Days
• Field of Search: 370328-329, 370/331, 370/332, 370/330, 370/350, 370503-508, 370/509, 455/436, 455/437, 455/438, 455/439, 455450-452, 455524-525, 455/68, 455/69, 455133-135, 375/240, 375/240.18, 375/240.23, 375/240.24, 375/240.28, 375/253
• US Class Current: 370/331
• 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 69/18 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: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/4363 Adapting the video stream to a specific local network, e.g. a Bluetooth® network
• 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 for validating that a client is in sync with a host and performing a dynamic change from a first interface type to a second interface type, the method comprising the steps of:

setting, by the host, one or more flags in a reverse link encapsulation packet to request the client to send a client request and status packet to the host;

providing by the host a reverse data packets field within the reverse link encapsulation packet, the reverse data packets field having a duration;

sending the reverse link encapsulation packet by the host to the client over a link, the reverse link encapsulation packet allowing the client to take control of the link and send packets to the host over the link during the duration of the reverse data packets field;

receiving by the host the client request and status packet sent by the client;

determining by the host that the client is in sync with the host based on the received client request and status packet; and

sending by the host a perform type handoff packet to the client to instruct the client to handoff from using the first interface type to using the second interface type.

2. The method of claim 1, further comprising the step of:

specifying by the host in an interface type field within the perform type handoff packet a forward link interface type and a reverse link interface type.

3. The method of claim 2, wherein, after sending the perform type handoff packet, the host uses the forward link interface type in sending packets to the client and uses the reverse link interface type in receiving packets from the client.

4. The method of claim 2, wherein, after receiving the perform type handoff packet, the client uses the forward link interface type in receiving packets from the host and uses the reverse link interface type in sending packets to the host.

5. The method of claim 1 further comprising the step of providing by the host a delay filler field within the perform type handoff packet to provide a predetermined amount of time for the client to prepare to handoff.

6. The method of claim 1, further comprising the step of providing by the host a delay filler field within the perform type handoff packet to provide a predetermined amount of time for the client to prepare to handoff.

7. The method of claim 1, wherein the step of determining by the host that the client is in sync with the host based on the received client request and status packet comprises the step of reading the CRC error count field in the received client request and status packet.

8. The method of claim 1, wherein the step of determining by the host that the client is in sync with the host based on the received client request and status packet comprises the step of reading the client busy field in the received client request and status packet.

9. The method of claim 1, wherein the step of setting, by the host, one or more flags in a reverse link encapsulation packet to request the client to send a client request and status packet to the host comprises the step of:

setting, by the host, one or more flags in the reverse link encapsulation packet to request the client to send a client capability packet to the host.

10. A computer program product, comprising:

computer readable medium comprising;

computer code that, when executed by a processor, causes the processor to validate that a client is in sync with a host and performance of a dynamic change from a first number of data channels to a second number of data channels in a digital transmission link, the computer code comprising instructions that, when executed by the processor, cause the processor to perform operations comprising;

setting, by the host, one or more flags in a reverse link encapsulation packet to request the client to send a client request and status packet to the host;

providing by the host a reverse data packets field within the reverse link encapsulation packet, the reverse data packets field having a duration;

sending the reverse link encapsulation packet by the host to the client over a link, the reverse link encapsulation packet allowing the client to take control of the link and send packets to the host over the link during the duration of the reverse data packets field;

receiving by the host the client request and status packet sent by the client;

determining by the host that the client is in sync with the host based on the received client request and status packet; and

sending by the host a perform type handoff packet to the client to instruct the client to handoff from using the first number of data channels to using the second number of data channels.

11. The computer program product of claim 10, further comprising the step of:

specifying by the host in an interface type field within the perform type handoff packet a forward link interface type and a reverse link interface type.

12. The computer program product of claim 10 further comprising providing a predetermined amount of time by the host a delay filler field within the perform type handoff packet to prepare the client for the handoff.

13. A method for performing a dynamic change from a first number of data channels to a second number of data channels in a digital transmission link, the method comprising the steps of:

sending a reverse link encapsulation packet by a host to a client over a link, the reverse link encapsulation packet allowing the client to take control of the link and send packets to the host over the link during the duration of a reverse data packets field;

receiving by the host the client request and status packet sent by the client;

determining by the host that the client is in sync with the host based on the received client request and status packet;

sending a perform type handoff packet to the client instructing the client to handoff from using the first number of data channels to using the second number of data channels; and

receiving the second number of data channels by the client while receiving a packet that follows the sent perform type handoff packet.

14. The method of claim 13 further comprising the step of:

specifying by the host in an interface type field within the perform type handoff packet a forward link interface type and a reverse link interface type.

15. The method of claim 13 further comprising the step of providing by the host a delay filler field within the perform type handoff packet to provide a predetermined amount of time for the client to prepare to handoff.

16. A computer program product, comprising:

computer readable medium comprising;

computer code that, when executed by a processor, causes a dynamic change from a first number of data channels to a second number of data channels in a digital transmission link, the computer code comprising instructions that, when executed by the processor, cause the processor to perform operations comprising;

sending a reverse link encapsulation packet by a host to a client over a link, the reverse link encapsulation packet allowing the client to take control of the link and send packets to the host over the link during the duration of a reverse data packets field;

receiving by the host the client request and status packet sent by the client;

determining by the host that the client is in sync with the host based on the received client request and status packet;

sending a perform type handoff packet to the client instructing the client to handoff from using the first number of data channels to using the second number of data channels; and

receiving the second number of data channels by the client while a packet that follows the sent perform type handoff packet is received.

17. The computer program product of claim 16, further comprising the step of:

specifying by the host in an interface type field within the perform type handoff packet a forward link interface type and a reverse link interface type.

18. The computer program product of claim 16 further comprising providing a predetermined amount of time by the host a delay filler field within the perform type handoff packet for the client to receive the second number of data channels.