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

Mixed service resource distributing method for OFDM system

A resource allocation and orthogonal frequency division technology, applied in the field of mixed service resource allocation, can solve problems such as no scheduling algorithm given, unreasonable, etc.

Inactive Publication Date: 2009-07-08
UNIV OF SCI & TECH OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The method of hybrid resource allocation mentioned in "International Conference Organized by IEEE Communications Society IEEE International Conference, Volume 1, 2004, pp58-62", due to the use of exponential scheduling criteria and proportional fairness criteria, respectively Calculate the utility function of real-time business and non-real-time business, so it does not give a scheduling algorithm suitable for both real-time business and non-real-time business; in addition, this method assumes that data business packets will not be discarded due to delay. unreasonable

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
  • Mixed service resource distributing method for OFDM system
  • Mixed service resource distributing method for OFDM system
  • Mixed service resource distributing method for OFDM system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment uses an OFDM transmission system with a bandwidth of 2.048 MHz and a number of data subcarriers of 64. The channel adopts the COST207 six-path model, the maximum multipath delay is 10us, the six paths are distributed at equal intervals within 0-10us, and the power spectral density of each path meets the usual Jake model. The maximum Doppler frequency deviation is 300Hz. The slot length is 1ms, the packet size is fixed at 1280bits, and the sliding window length is t c The value of is 1000 time slots. MQAM adaptive modulation mode is adopted, M={0, 2, 4, 8, 16, 32}. The number of voice users and data users in the fixed system are 5 and 3 respectively.

[0051] The business source model adopts ON-OFF two-state Markov process. The active period and the silent period are independent of each other and obey the exponential distribution. The transition probability from the active period to the silent period is γ=1-exp(-T slot / t 1 ), the transition probab...

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 hybrid service resource allocation method of the OFDM system of the present invention is characterized in that a fairness criterion of service quality satisfaction based on the joint cross-layer optimization of the physical layer and the data link layer is proposed, and the criterion is applicable to both real-time services It is also suitable for non-real-time services; the resource allocation method proposed on the basis of analyzing the characteristics of this criterion, according to the total number of users in the active state of each time slot, the user's requirements for service quality, and the user's time slot in each time slot The user's utility function value is calculated based on the received service quality counted at the beginning, so as to determine the user's priority, and the adaptive subcarrier and bit joint allocation module first allocates subcarriers to the groups of users with high levels, and then assigns subcarriers to the groups of users with high levels Subcarriers are assigned to groups of low users. Therefore, the present invention can not only better satisfy users' requirements on service quality, but also ensure the fairness of service quality satisfaction among users.

Description

Technical field: [0001] The invention belongs to the technical field of Orthogonal Frequency Division Multiplexing (OFDM) mobile communication, and particularly relates to a mixed service resource allocation method in the OFDM communication system. Background technique: [0002] Traditional OFDM resource allocation research focuses on two aspects of bit allocation and power allocation, such as "International Institute of Electronics and Electrical Engineers Communication Topics Journal" (IEEE J. 1758) with the multi-user adaptive subcarrier, bit and power allocation algorithm. Because these algorithms do not take into account the random characteristics of service arrival, user queue status, user requirements for Quality of Service (QoS), etc. during the allocation process, it is difficult to provide users with satisfactory services. [0003] The method of hybrid resource allocation mentioned in "International Conference Organized by IEEE Communications Society IEEE Internat...

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): H04B7/26H04L5/02H04W16/10
Inventor 侯华周武旸朱近康
Owner UNIV OF SCI & TECH OF CHINA
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