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Orthogonal frequency-division multiplexing system scheduling method

A technology of orthogonal frequency division and scheduling method, applied in the field of orthogonal frequency division multiplexing system scheduling, can solve problems such as delay and unfair user service, and achieve the effect of improving transmission capacity and reducing system interference

Inactive Publication Date: 2007-06-13
SHANGHAI ULTIMATE POWER COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the time sliding window reflects the user's tolerance for not receiving data transmission. A longer T c It will allow to wait for a long time until the user's channel quality becomes better, which is beneficial to the improvement of system throughput, but may bring additional delay and cause unfair service among users

Method used

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  • Orthogonal frequency-division multiplexing system scheduling method
  • Orthogonal frequency-division multiplexing system scheduling method
  • Orthogonal frequency-division multiplexing system scheduling method

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Embodiment Construction

[0052] The core of the present invention is to comprehensively consider the channel quality of each subband of a certain UE as the scheduling basis, and evaluate the channel quality of the user according to the channel quality information of the latest scheduling feedback of each subband of the system user, so that the user's channel quality can be evaluated according to the channel quality of each user. As a result of the evaluation, use the existing MAX C / I algorithm or Proportional Fair algorithm to queue up the scheduling priority of all users in the cell, and then select the scheduled users according to their priority order, and allocate subband resources for them. When subband resources are allocated, the resources allocated in the latest scheduling period can be preferentially selected for the scheduled users for subband allocation. When the subband resources to be allocated to users are greater than the resources allocated in the latest scheduling period, the allocated ...

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Abstract

The method includes steps: based on channel quality of each sub band in dispatch for system user in latest time to carry out queuing for dispatching priority; allocating resources of sub band for selected users to be dispatched according to sequence of users' priority. The invention makes system dispatch selected sub band with good channel quality based on channel quality priority of user's each sub band. The system increases system throughput capacity, and reduces system interference.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an orthogonal frequency division multiplexing system scheduling method. Background technique [0002] Future wireless communication systems are expected to be able to provide high-speed data communication capabilities, which contradicts the lack of spectrum resources. Therefore, how to improve spectrum efficiency and data throughput under limited spectrum resources has become one of the key issues in future wireless communication systems. OFDM (Orthogonal Frequency Division Multiplexing) has become one of the mainstream technologies for high-speed data transmission due to its high spectral efficiency and ability to resist multipath interference. OFDM belongs to the multi-carrier modulation technology. Its main idea is to divide the assigned channel into many orthogonal sub-channels, perform narrow-band modulation and transmission on each sub-channel, and the signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 秦飞
Owner SHANGHAI ULTIMATE POWER COMM TECH