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

Bias input time-fair scheduling method in single-carrier power line system

A scheduling method and power line technology, applied in the field of power line communication, can solve the problems of users not getting service, ignoring user fairness and other service quality problems

Inactive Publication Date: 2017-01-04
NANJING UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The channel conditions of users who are close to the base station are relatively good, and those who are far away are poor. In this way, users who are close to the base station will always receive service, while those users who are farther away will hardly receive service.
This only maximizes system performance, while ignoring user requirements for fairness and other quality of service

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
  • Bias input time-fair scheduling method in single-carrier power line system
  • Bias input time-fair scheduling method in single-carrier power line system
  • Bias input time-fair scheduling method in single-carrier power line system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In each time slot, the basic flow of the time fair scheduling method based on single carrier power line is as follows:

[0028] step 1:

[0029] estimate It can be divided into uplink estimation and downlink estimation.

[0030] Uplink: The base station estimates the channel conditions for each user and then calculates the signal-to-noise ratio i=1,...,N.

[0031] Downlink: user i measures its own channel condition, and then estimates its own SNR Finally, the estimated value is sent to the base station.

[0032] Step 2:

[0033] Base station according to formula The scheduling strategy to determine which user should be called for the time slot to transmit.

[0034] Step 3:

[0035] Data transmission is performed according to the selected scheduling scheme.

[0036] Uplink: The base station broadcasts the ID number of the selected user, and selects the user to transmit in this time slot.

[0037] Downlink: The base station transmits messages to the schedule...

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 discloses a bias input time-fair opportunity scheduling method in a single-carrier power line system. When time slot scheduling starts, the system estimates the channel state information through a channel estimation method such as a pilot signal, and feeds the information back to a scheduler. After the scheduler collects the feedback information, the lowest total power consumption of the system is used as a goal, and user scheduling is realized through the method. According to the core idea of the invention, the weight of different users to acquire service opportunities is constantly adjusted by introducing dynamically varying bias to realize the fairness of the system. Compared with polling scheduling and greedy scheduling methods, the method has the advantages that two-way requirements of resource fairness and low power consumption of the system of users are met.

Description

technical field [0001] The invention relates to a time fair scheduling method introducing an offset in a single-carrier power line system, and belongs to the field of power line communication (Power Line Communication, PLC). Background technique [0002] With the rapid development of smart grid technology and applications, power line communication (Power Line Communication, PLC) is more and more widely used. The power line network with the characteristics of high speed and large capacity is gradually emerging. Power line communication uses the existing power line as the communication medium to realize the interconnection and intercommunication of the power line network, which is the technical basis for realizing the "four-network integration" in the future. In addition, a power line communication system also includes equipment such as modems and relays. The modulator modulates information onto a high-frequency signal, and then loads the high-frequency signal on the current...

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
IPC IPC(8): H04W72/12
CPCH04W72/542H04W72/535Y02D30/70
Inventor 王子杨钱玉文桂林卿孙金山束锋
Owner NANJING UNIV OF SCI & TECH