We propose a new transmission scheme for uplink URLLC systems, which can coexist with the eMbb transmission while can still meet the reliability and latency requirements of the URLLC. The proposed scheme spreads the data in both time and frequency domains. The performance of the proposed system is analyzed and closed form expressions are derived. From the analytical results, we optimize the parameters including constellation levels, spreading length and transmit power to maximize the sum rate of the URLLC UE. Simulation results show that the proposed solution significantly improve the performance and the data rate can be up to 8.9 Mpbs in the LTE TDL-C nominal channel with co-existence and achieved URLLC requirements.


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    Title :

    Frequency and Time Spreading for Uplink URLLC Transmission


    Contributors:


    Publication date :

    2020-05-01


    Size :

    209894 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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