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
US20110280135A1Inactive Publication Date: 2011-11-17APPLE INC
5 Cites 8 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
APPLE INC
Publication Date
2011-11-17
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More