YiChin2018
52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
import pandas as pd
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import numpy as np
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def main():
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'''
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purpose:
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in order to analyze the data loss of bluetooth, a small code is needed.
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Guess that there are three type of data loss. In order to prove this idea,
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several tests are needed
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types of data loss:
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1. packet loss:
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bluetooth notification does not need any negotiation.
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if there is any packet loss during the connection,
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it will not be lost forever
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2. program delay causes loss in client(headstage):
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too many effort on data packaging, it would cause
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data delay
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3. program delay causes loss in host(controller):
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...todo and need to define
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Assume that we have lost several bytes data. We want to analyze the type of data lost.
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method:
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compare ramp data with time stamp, there are several conditions
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if data_delta * 1 / sampling rate == time_delta:
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this should be packet loss
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else
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this should be program delay
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method to coped with the corresponding problem:
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1. try 'Indication' to check data loss is reduced or not.
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2. modified the procedure of data packaging
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3. after the upper two problems are excluded, this problem should be left over
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:return:
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'''
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# skip header information
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df = pd.read_csv("C:/Users/yichin/Downloads/last-2019-07-18-16-30-15-7.csv", sep=",", skiprows=12, header=None)
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sel_df = pd.DataFrame(df)
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column, row = sel_df.shape
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sel_df = sel_df.fillna(value=0)
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delta_df = sel_df.diff(periods=1)
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delta_df = delta_df.fillna(value=0)
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delta_df = delta_df.drop(column-1)
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delta_df.set_axis(['time_delta', 'data_delta'], axis='columns', inplace=True)
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if __name__ == '__main__':
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main()
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