A method and system for adjusting an MCS selection threshold
A threshold adjustment and threshold technology, applied in transmission systems, digital transmission systems, error prevention, etc., can solve problems such as poor BLER performance, lower system efficiency, and less than MCS level adjustment, so as to improve throughput, improve system efficiency, Effect of reducing MCS selection error probability
Inactive Publication Date: 2019-03-22
POTEVIO INFORMATION TECH CO LTD
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However, under the condition of low signal-to-noise ratio, the reported value of SINR fluctuates greatly
Therefore, on the one hand, due to the large interval of demodulation signal-to-noise ratio between adjacent MCSs in the 230MHz wireless communication system, once the MCS is selected incorrectly, the BLER performance is poor
Especially for small data volume services, the required number of wireless frames may not reach the length of the BLER statistical window, and thus the correct MCS level cannot be adjusted, which will lead to a large number of retransmissions and reduce system efficiency
On the other hand, there is no fixed guidance method for correcting the threshold value obtained by simulation. In order to ensure the BLER of the initial selection of MCS, the adjustment value is often selected too large, which will result in the case of selecting a low order under high channel capacity. Reduced communication rate of the system
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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0056] The equivalent SINR used for the downlink initial MCS selection of the 230MHz system is calculated using the PCFICH channel reconstruction signal and the downlink pilot frequency. Since the number of REs used to calculate the equivalent SINR is small, the SINR value has certain jitter, especially when the channel environment is poor, the SINR jitter is relatively large. In addition, in order to avoid frequent switching between adjacent MCSs, the 230MHz sy...
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The present invention provides an MCS (Modulation and Coding Scheme) selection threshold regulation method. The method comprises: selecting a target error rate BLER according to a system initiation modulation and the grade of a coding strategy MCS; obtaining an average BLER selected by the system MCS in a setting regulation value according to the MCS features of the system in each grade; continuously regulating the setting regulation value until the difference of the average BLER and the target error rate BLER is smaller than a setting difference, taking the setting regulation value as a final regulation value; and obtaining the MCS selection threshold according to the final regulation value. The present invention further provides an MCS selection threshold regulation system. The system comprises a first calculation module, a second calculation module, a regulation module and a determination module. According to the invention, the purposes of reducing MCS selection error probability and improving throughput of the system may be achieved, and the system efficiency may be improved.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for adjusting an MCS selection threshold. Background technique [0002] The 230MHz wireless communication system adopts adaptive modulation and coding scheme (MCS for short), which adopts high-order modulation and high code rate coding under good channel conditions to improve system capacity; Modulation and low bit rate coding to ensure system demodulation performance. According to the equivalent signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, referred to as SINR), which represents the channel quality, this technology responds quickly to channel changes, dynamically selects MCS, improves link reliability, and maximizes system capacity. [0003] The current 230MHz system calculates the SINR based on the Physical Control Format Indicator CHannel (Physical Control Format Indicator CHannel, referred to as P...
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IPC IPC(8): H04L1/00
Inventor 王单
Owner POTEVIO INFORMATION TECH CO LTD