User scheduling method in LTE (Long Term Evolution) system

A user scheduling and user technology, applied in the field of communication, can solve the problem that the PF priority denominator index cannot accurately characterize the channel state, and achieve the effect of overcoming fairness and throughput, preventing system resources from occupying, and increasing user scheduling opportunities.

Inactive Publication Date: 2010-11-03
XIDIAN UNIV
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Problems solved by technology

This method can improve the user throughput under poor channel quality conditions, thereby improving the fairness of the system, but the value of the PF priority denominator index determined by this method cannot accurately represent the change of the channel state

Method used

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  • User scheduling method in LTE (Long Term Evolution) system
  • User scheduling method in LTE (Long Term Evolution) system
  • User scheduling method in LTE (Long Term Evolution) system

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Embodiment Construction

[0020] see figure 1 , the implementation steps of the user scheduling method in the LTE system of the present invention are as follows:

[0021] Step 1, according to the signal received by user i, use a general method to calculate the SINR of user i at time t:

[0022] SINR i ( t ) = | | H i ( t ) w i | | 2 σ i 2 + Σ k = 1 , k ...

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Abstract

The invention discloses a user scheduling method in an LTE (Long Term Evolution) system, which comprises the steps of: calculating a single-to-interference noise ratio of a user i according to a signal received by the user i; (2)solving a maximum transmission rate of the user i at time t according to the signal-to-interference and noise rate; (3) solving an average transmission rate of the user i at the time t according to the maximum transmission rate of the user i at the time t; (4) calculating the scheduling priority factor denominator index of the user i according to the maximum transmission rate and the average transmission rate of the user i at the time t and the time t-1; (5) calculating the scheduling priority factor of the user i at the time t; and (6) sequencing the scheduling priority factors of all the users at time t by size in a cell, and selecting the user with the maximum scheduling priority factor for scheduling. The scheduling priority factor designed by the invention can track the channel quality change conditions of all uses in real time, increase the scheduling chances for the users with poor channel quality and prevent the occurrence of the situation that users with good channel quality occupy excessive system resources.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a user scheduling method in a Long Term Evolution (LTE for short) system. Background technique [0002] In the LTE system, scheduling is to dynamically allocate the most suitable time / frequency / space resources to a certain user. It is one of the important guarantees for realizing the multi-user diversity gain of the LTE system and determines the performance of the entire system to a large extent. , so the scheduling technology is regarded as the core technology in the LTE system. In the communication process, multiple users share limited bandwidth resources. How to allocate resources among users and whether the allocation is fair becomes the first issue that scheduling technology needs to consider. [0003] Currently, a more commonly used scheduling method in an LTE system is a proportional fair (PF) scheduling algorithm. For example, the patent applied by ZTE Corporation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
Inventor 李兵兵李晓玮兰冰黄敏
Owner XIDIAN UNIV
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