Transmitting and receiving method and device of VoIP service

A business and frequency domain technology, applied in interconnection devices, telephone communications, digital transmission systems, etc., can solve the problems of increasing system processing load, increasing data packet transmission delay, and large power consumption, etc., to reduce retransmission The effect of reducing the number of times, reducing power consumption, and reducing the processing load

Inactive Publication Date: 2008-05-07
PEKING UNIV FOUNDER GRP CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the channel environment is bad, the WiMAX system starts the adaptive modulation and coding (AMC, Adaptive Modulation and Code) mechanism and the hybrid automatic repeat request (HARQ, Hybrid Automation Repeat reQuest) mechanism, and the activation of the AMC mechanism and the HARQ mechanism requires complex detection The participation of the algorithm will inevitably increase the processing load of the system, and the transmission delay of the data packet will be increased due to the repeated retransmission of the data packet, and the power consumption will be large

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
  • Transmitting and receiving method and device of VoIP service
  • Transmitting and receiving method and device of VoIP service
  • Transmitting and receiving method and device of VoIP service

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] On the basis of the existing voice data transmission method, the embodiment of the present invention distributes a single symbol to multiple subcarriers for transmission by adding frequency domain spreading processing steps to obtain frequency gain; correspondingly, in the existing voice data receiving Based on the method, the symbols carried by multiple subcarriers are combined with equal gain by adding frequency domain despreading processing steps.

[0037] The specific implementation manners of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] The flowchart of the VoIP service data sending method provided by the embodiment of the present invention is shown in Fig. 3, and includes the steps:

[0039] Step 310: Perform frequency domain spread spectrum processing on the VoIP data packet after the encoding and modulation processing;

[0040] Among them, the spreading gain value based on the frequency

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 discloses an emitting method of VoIP operation; the method comprises the steps that a VoIP data packet is implemented with the process of spectrum spread of frequency domain after the coding and modulating process; and then the data packet is implemented with the OFDM modulating baseband processing and then the packet is emitted. The present invention also discloses a receiving method of VoIP operation comprising the steps that the data packet is received after the OFDM modulating baseband processing and the data packet is implemented with the OFDM modulating baseband processing; and then the data packet is implemented with the process of spectrum spread of frequency domain and then the data packet is implemented with demodulation coding process. The present invention also discloses an emitter and a receiver of VoIP operation. The present invention reduces the reemission times of the sound data packet and shortens the transmission delay of sound data packet; moreover, the processing load of the system and the energy consumption are reduced.

Description

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

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
Owner PEKING UNIV FOUNDER GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap