Method for reducing apparent latency in linking a call received at a mobile communication device to a remote audio processor

• US 7,643,856 B2
• Filed: 12/09/2005
• Issued: 01/05/2010
• Est. Priority Date: 12/09/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Singh, Nitin, Howard, James L., Daniels, Jared R.
• Primary Examiner(s): Nguyen; Tu X
• Application Number:
  US11/298,398
• Publication Number:
  US 20070135148A1
• Time in Patent Office: 1,488 Days
• Field of Search: 455/575.2, 455/568, 455/574, 455/127.5, 455/41.2, 370/324, 370/350, 370/245, 370/338, 370/908
• US Class Current: 455/575.2
• CPC Class Codes: H04M 1/6066 including a wireless connection
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mobile communication device (100) uses a local wireless transceiver (108) to establish an asynchronous link (202) with a remote audio processor (110) which is typically operated in a low power mode and that maintains an association between the mobile communication device and remote audio processor. When the mobile communication device receives an incoming call page (210), the mobile communication device initiates a synchronous link with the remote audio processor, and responds to the incoming call page at a time when the call will be connected only after the synchronous link is established.

Claims

1. A method for reducing apparent latency in linking a call received at a mobile communication device to a remote audio processor, comprising:

establishing an asynchronous link between the remote audio processor and the mobile communication device;

receiving an incoming call page at the mobile communication device from a wireless communication system after the establishing, the incoming call page indicating the wireless communication system is attempting to connect an incoming call to the mobile communication device;

initiating a synchronous link between the remote audio processor and the mobile communication device, the synchronous link having a minimum set up time;

alerting a user of the mobile communication device of the incoming call after establishing the synchronous link; and

responding to the incoming call page at a time where the synchronous link will be established prior to the incoming call being established.

2. A method for reducing apparent latency as defined in claim 1, further comprising establishing the synchronous link, and wherein responding to the incoming call page is performed after establishing the synchronous link.

3. A method for reducing apparent latency as defined in claim 1, wherein responding to the incoming call page is performed after a delay time.

4. A method for reducing apparent latency as defined in claim 3, wherein the delay time is selected to ensure the incoming call is established after a sniff period of the asynchronous link where the synchronous link is initiated.

5. A method for reducing apparent latency as defined in claim 3, wherein if the synchronous link is established before expiration of the delay time, responding to the incoming call page after the synchronous link is established and before expiration of the delay time.

6. A method for reducing apparent latency as defined in claim 1, wherein receiving the incoming call page is receiving an incoming dispatch call page.

7. A mobile communication device, comprising:

a local wireless transceiver operable in an asynchronous link mode and a synchronous link mode for communicating with a remote audio processor;

a communications transceiver which communicates with a communications base station;

a controller operably coupled to the local wireless transceiver and the communications transceiver;

wherein the local wireless transceiver establishes an asynchronous link with a remote audio processor, and upon reception of an incoming call page at the communications transceiver after the establishing, the incoming call page indicating a call is forthcoming, the controller alerts a user of the mobile communication device of the call after establishing an synchronous link, and the communications transceiver responds to the incoming call page at a time when the synchronous link mode is established prior to connection of the call.

8. A mobile communication device as defined in claim 7, wherein the communications transceiver responds to the incoming call page after the local wireless transceiver synchronous link is established by the local wireless transceiver.

9. A mobile communication device as defined in claim 7, wherein the communications transceiver responds to the incoming call page after a preselected delay time.

10. A mobile communication device as defined in claim 9, wherein the delay time is selected to ensure the call is established after an occurrence of a sniff period of the asynchronous link where the synchronous link is initiated by the local wireless transceiver.

11. A mobile communication device as defined in claim 9, wherein if the synchronous link is established before expiration of the delay time, the communications transceiver responds to the incoming call page after the synchronous link is established and before expiration of the delay time.

12. A mobile communication device as defined in claim 9, wherein the local wireless transceiver operates according to a Bluetooth interface.

13. A method of avoiding audio loss between a mobile communication device and an associated remote audio processor upon connection of a call, comprising:

establishing a data link between the remote audio processor and a local wireless transceiver of the mobile communication device;

receiving an incoming call page at a communications transceiver of the mobile communication device after the establishing;

subsequent to receiving the incoming call page, initiating a voice link between the remote audio processor and the local wireless transceiver;

establishing the voice link;

alerting a user of the mobile communication device of the incoming call page after establishing the voice link; and

responding to the incoming call page at a time when connection of the call will occur only after establishing the voice link.

14. A method of avoiding audio loss as defined by claim 13, wherein establishing the data link comprises:

maintaining the local wireless transceiver in a low power state for a majority of a link interval; and

handshaking with the remote audio processor during periodic handshaking periods of the link interval.

15. A method of avoiding audio loss as defined by claim 13, wherein responding to the incoming dispatch call page is performed prior to initiating the voice link.

16. A method of avoiding audio loss as defined by claim 13, wherein responding to the incoming call is performed after a delay period after receiving the incoming call page.

17. A method of avoiding audio loss as defined by claim 13, wherein responding to the incoming call page is performed after the establishing the voice link.

18. A method of avoiding audio loss as defined by claim 13, wherein responding to the incoming call page is performed after the earlier occurrence of either establishing the voice link, or a delay period.