MUTUAL INFORMATION BASED SIGNAL TO INTERFERENCE PLUS NOISE RATIO ESTIMATOR FOR RADIO LINK MONITORING
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Abstract
An effective SINR mapping based approach can be used to average the MI or RBIR values corresponding to narrowband SINR values in frequency between the resource blocks of the E-UTRA grid structure and then to estimate the downlink radio link quality from the averaged mutual information domain value by mapping it back to wideband SINR value covering the whole or partial E-UTRA system bandwidth. This wideband SINR value can then be further averaged in time and used as a downlink radio link quality estimate for E-UTRA radio link monitoring. Mutual information based effective SINR mapping is one example of an effective SINR mapping based approach.
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Citations
43 Claims
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1-24. -24. (canceled)
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25. A method, comprising:
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using a quality mapping approach to average mutual information or received bit information rate values corresponding to the narrowband signal to interference plus noise ratio values in frequency between the resource blocks of the resource grid structure, to produce an averaged mutual information domain value; estimating downlink radio link quality from the averaged mutual information domain value by mapping the averaged mutual information domain value back to a wideband signal to interference plus noise ratio value covering a part up to the whole of the system bandwidth; further averaging the wideband signal to interference plus noise ratio value in time to provide a time-averaged signal to interference plus noise ratio value; and using the time-averaged signal to interference plus noise ratio value as a downlink radio link quality estimate for radio link monitoring. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 43)
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34. An apparatus, comprising:
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at least one memory including computer program code; and at least one processor, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to use a quality mapping approach to average mutual information or received bit information rate values corresponding to the narrowband signal to interference plus noise ratio values in frequency between the resource blocks of the resource grid structure, to produce an averaged mutual information domain value; estimate downlink radio link quality from the averaged mutual information domain value by mapping the averaged mutual information domain value back to a wideband signal to interference plus noise ratio value covering a part up to the whole of the system bandwidth; further average the wideband signal to interference plus noise ratio value in time to provide a time-averaged signal to interference plus noise ratio value; and use the time-averaged signal to interference plus noise ratio value as a downlink radio link quality estimate for radio link monitoring. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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Specification