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Error handling for named signal events in wireless communications

a wireless communication and event technology, applied in the field of wireless communication, can solve the problems of undamaged voice packets, damaged and undamaged, and achieve the effect of reducing the impact of receiving errant information

Inactive Publication Date: 2011-11-17
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an efficient and effective technique for handling damaged named signal event (NSE) packets that are received in association with a voice over packet based telephony call. The received packets for a telephony call may include voice packets as well as NSE packets. Upon receipt of the packets at a physical layer, the packets are processed at a link layer to detect damaged packets having link layer errors. Whether damaged or not, the incoming packets are sent to an audio application at an application layer for further processing. For damaged packets, link layer error indication is generated at the link layer and sent to the audio processing application at the application layer. The audio application will use the link layer error indicia to identify damaged packets or payloads associated with damaged packets, and determine whether the payloads corresponding to the damaged packets include NSE information defining a named signal event. If the damaged packets have NSE information, damaged NSE packets are processed accordingly.
In one embodiment, damaged NSE packets, and in particular the payloads corresponding to the damaged NSE packets, are discarded. Thus, the audio processing application will process damaged and undamaged voice packets, as well as undamaged NSE packets, in traditional fashion. The damaged NSE packets are processed as desired or discarded to minimize the impact of receiving errant information defining a named signal event. A named signal event may include any in-band signaling, such as a busy, fast busy, or ringing tones heard by a caller during initiation of a call, as well as the delivery of dual tone multi-frequency tones used for initiating a call or selecting options during automated call processing.

Problems solved by technology

Thus, the audio processing application will process damaged and undamaged voice packets, as well as undamaged NSE packets, in traditional fashion.

Method used

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  • Error handling for named signal events in wireless communications
  • Error handling for named signal events in wireless communications
  • Error handling for named signal events in wireless communications

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Embodiment Construction

The embodiments set forth below represent the necessary information to enable those skilled in the art to practice the invention and illustrate the best mode of practicing the invention. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the invention and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

Prior to delving into the details of the present invention, an overview of a wireless communication environment is illustrated in FIG. 1. As illustrated, a packet network 10 supports telephony communications with or between any number of mobile terminals 12. Generally, an access point 16 is used to support wireless communications with the mobile terminals 12 and will directly or indirectly connect to the packet network 10. For local wir...

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Abstract

The present invention provides a technique for handling damaged named signal event (NSE) packets that are received in association with a voice over packet based telephony call. The received packets for a telephony call may include voice packets as well as NSE packets. Upon receipt of the packets at a physical layer, the packets are processed at a link layer to detect damaged packets having link layer errors. The incoming packets are sent to an audio application at an application layer for further processing. For damaged packets, link layer error indicia is generated at the link layer and sent to the audio processing application. The audio application will use the link layer error indicia to identify damaged packets or payloads associated with damaged packets, and determine whether the payloads corresponding to the damaged packets include NSE information defining an NSE. Damaged NSE packets are processed accordingly.

Description

FIELD OF THE INVENTIONThe present invention relates to wireless communications, and in particular to detecting and processing damaged packets carrying named signal event information in association with a telephony call.BACKGROUND OF THE INVENTIONThe public switched telephone network (PSTN) has traditionally provided telephony communications to the masses. The PSTN is a circuit-switched network where each call is essentially allocated a dedicated circuit through which audio signals are carried. These audio signals may include voice information as well as in-band signaling information. The in-band signaling information is tones or tone sequences for providing audible alerts to one of the parties to the call as well as for conveying control information among communication terminals and call processing entities in the PSTN. For example, the audible alerts may include the traditional busy, fast busy, and ringing alerts provided to a caller when the call is being initiated. The control in...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04W4/00H04W24/00
CPCH04L1/0061H04M2207/185H04M7/0084
Inventor THOMAS, MICHAEL FLYNN
Owner APPLE INC
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