Channel quality indication predicting and compensating method and system

A technology of channel quality indication and compensation method, applied in the field of channel quality indication prediction and compensation, can solve the problems of waste of power or frequency resources, waste of time resources, etc., and achieve the effect of low complexity, easy implementation, and improvement of system communication capacity

Inactive Publication Date: 2011-01-26
PEKING UNIV
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Problems solved by technology

For the situation where the channel becomes better, this will lead to a waste of power or frequency resources, and for the situation where the channel becomes worse, it is likely to trigger the HARQ process, resulting in a waste of time resources

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  • Channel quality indication predicting and compensating method and system
  • Channel quality indication predicting and compensating method and system
  • Channel quality indication predicting and compensating method and system

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Embodiment Construction

[0028] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The present invention provides a method for eNodeB to predict and compensate the CQI fed back by UE in an LTE communication system and the existing time series model ARIMA (Autoregressive Integrated Moving Average Model) for modeling and The prediction algorithm specifically involves a method of predicting and compensating CQI using an autoregressive sum moving average model, including identifying the ARIMA model, estimating the ARIMA model, diagnosing the estimated ARIMA model, and using the ARIMA model Give the required CQI prediction and compensation results.

[0030] The so-called ARIMA model refers to the transformation of a non-stationary time series into a stationary time series through the step of difference...

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Abstract

The invention discloses a channel quality indication predicting and compensating method and a channel quality indication predicting and compensating system. The method comprises the following steps of: accumulating CQI values of the same subband or full bandwidth at same intervals to form a CQI time sequence; identifying an autoregressive summarization moving average model, namely according to the CQI time sequence, identifying the process of the autoregressive summarization moving average model and determining parameters in the autoregressive summarization moving average model; estimating the parameters of the autoregressive summarization moving average model to determine the autoregressive summarization moving average model; and predicting the CQI values based on the determined autoregressive summarization moving average model. The method can effectively reduce the difference of the original CQI values and a true value at the current moment so as to save communication resources and energy and improve the system communication capacity; and the method also has the advantages of low complexity of algorithms and convenient implementation.

Description

Technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and system for predicting and compensating channel quality indicators. Background technique [0002] In a cellular communication system, the quality of the signal received by the user depends on the channel quality of the cell, the noise level and the interference level of adjacent cells. Under a certain transmission power, in order to optimize the capacity and coverage of the system, the data transmission rate of the transmitter must be able to match the signal quality received by the UE, that is, when the signal quality received by the UE is good, more data will be sent, but less data. This is because low-order modulation and coding methods can resist higher interference and noise, but have a low transmission rate; while high-order modulation and coding methods have a high transmission rate, but are more sensitive to interference and noise. This techn...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W24/06
CPCY02B60/50Y02D30/70
Inventor 尚勇陈晓华
Owner PEKING UNIV
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