Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method

A dynamic allocation and access system technology, applied in the field of optical communication, can solve the problems of allocation of carrier resources, low utilization rate of carrier resources and bandwidth resources, and inability to achieve network optimized access, so as to solve power loss and optimize access network Effect

Inactive Publication Date: 2011-04-27
BEIJING UNIV OF POSTS & TELECOMM
View PDF2 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, due to the different channel environments and application scenarios of different users, the requirements for received signals are also different. This system cannot dynamically allocate carrier resources according to user needs, that is, the utilization rate of carrier resources and bandwidth resources is low, reducing the The universality of the access network cannot realize the optimized access of the network

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
  • Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method
  • Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method
  • Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to make the object, technical solution, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0027]The present invention provides a passive optical network system and method based on dynamic orthogonal frequency division multiplexing (OFDM). In the system, the optical multi-carrier generation unit contained in the signal transmission device generates multiple carrier signals after cutting radio frequency signals. The original data is modulated by the dynamic OFDM generation unit and the multi-carrier signal, and enters the channel after polarization multiplexing processing; the signal receiving device adopts the matching receiving method to pass the signal detection unit, signal separation unit and The signal demodulation and processing unit restores the original data, realizing the matching transmission of optical OFDM dynamic resources.

[0...

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 invention provides an optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and a method thereof. In the system, multiple carriers generated by an optical multi-carrier generating unit included in a signal sending unit are input to an OFDM generating unit and then transmitted to a link unit, and signals are subjected to polarization multiplexing, fiber channel transmission and polarization demultiplexing in the link unit; and a signal matching and receiving unit acquires radio-frequency signals carrying information by using a signal detection module, and the information required by a user is demodulated through a signal demodulation processing unit. Dynamic subcarrier allocation of optical OFDM access can be realized by adopting the method and the system, wherein the sequential watermarking detection algorithm (SWDA) adopted by the system can dynamically adjust the distribution of each subcarrier in OFDM symbols, and an optimized access network under a low-complexity frame protocol is realized.

Description

technical field [0001] The invention relates to optical communication technology, in particular to an optical OFDM dynamic distribution access network system and a method thereof. Background technique [0002] With the rapid and continuous development of the Internet, high-bandwidth applications such as video conferencing, real-time games, and IPTV continue to emerge, especially the proposal of triple play services, which puts forward higher requirements for the bandwidth of the access network . The optical fiber access method has gradually been favored by global operators and users due to its huge bandwidth advantages, especially the passive optical network technology (PON, Passive Optical Network) has been widely deployed and applied due to its pure media technology. The passive optical network technology solves the bottleneck problem of the last mile in the communication network. In the future upgrade plan, the bit rate can be further increased to realize the gigabit sym...

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 Applications(China)
IPC IPC(8): H04L27/26H04Q11/00
Inventor 忻向军刘博张琦王拥军尹霄丽赵同刚马建新饶岚张晓磊张丽佳关昕郝宇霆陈雨露原全新刘皎
Owner BEIJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com