Unlock instant, AI-driven research and patent intelligence for your innovation.

Processing method for evading forward and backward encoding/decoding cascade manipulation

An operation processing and code-level technology, which is applied in the field of wireless communication, can solve the problems of excessive increase in system overhead and the inability to ensure the establishment of TFO, etc., and achieve the effect of reducing message sending and system overhead

Inactive Publication Date: 2013-06-05
ZTE CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case that the called party does not answer for a long time, on the one hand, this method will greatly increase the system overhead, and on the other hand, it cannot guarantee that the TFO can still be established after the called party answers.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Processing method for evading forward and backward encoding/decoding cascade manipulation
  • Processing method for evading forward and backward encoding/decoding cascade manipulation
  • Processing method for evading forward and backward encoding/decoding cascade manipulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] The invention provides a processing method in the MON state in a TFO system. After the TFO state machine enters the monitoring MON state by the Rx TFO module, the A port pulse code modulation PCM data is monitored within the timing time of the timer T1. When it is found that the PCM data of port A is constant and the duration exceeds the time specified by a timer T2, the state machine returns to the wake-up WAK state after the PCM data of port A becomes a random variable, that is, the data of port A takes effect.

[0042] Concrete realization of the present invention comprises the following steps:

[0043] (1) Set timers T1, T2 and counter T3 in advance.

[0044] T1 is the time for the Rx_TFO module to monitor the PCM data of port A after the state machin...

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

PUM

No PUM Login to View More

Abstract

The present invention provides a processing method of avoiding forward and backward coding and decoding cascade operation, including: monitoring the A port pulse code modulation PCM data after the forward and backward coding and decoding cascade operation TFO state machine enters into the MON state; after discovering that the A port PCM data is a constant and the duration time exceeds a time threshold T2, waiting until the A port PCM data is changed into a random variable, and then the TFO state machine falling back to a wake-up WAK state. The inventive method stops the search for the TFO message upon testing the A port PCM data constant, and the state machine only executes one state falling-back in the entire process after testing the A port PCM data constant, reduces a great amount of message transmission of the TC module, and effectively reduces the system spending.

Description

technical field [0001] The present invention relates to the field of wireless communication technologies, in particular to a TFO (Tandem Free Operation, avoiding cascade operation of encoding and decoding before and after) processing method of a mobile communication system TC (Transcoder, code type converter) module. The mobile communication system is a GSM (Global System for Mobile Communications, Global System for Mobile Communications) or 3G (Third Generation, third generation) system. Background technique [0002] In the traditional GSM system, MS (Mobile Station, mobile station) calls to MS have two voice codec processes. The voice signal is first encoded at the calling MS, and then converted to a PCM (Pulse Code Modulation, pulse code modulation) code stream format by the local TC module and transmitted to the opposite end, and then sent to the called MS after format conversion by the opposite end TC module to decode. This configuration is called Tandem Operation (fr...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04L29/06
Inventor 曾永慧
Owner ZTE CORP