In order to satisfy the increasingly massive connection in mMTC system, multiple access technology is a key enabler in the future 6G mMTC. Recently, an emerging multiple access scheme named resource hopping based multiple access (RHMA) has been proposed to achieve reliable user identification and data detection in grant-free random access for mMTC. However, the collision resolution of RHMA is still limited for the future 6G mMTC requirements. Therefore, an improved design is proposed in this paper to enhance the collision resolution capability of RHMA. Specifically, successive interference cancellation (SIC) is combined with user identification and segment decoding at the receiver of RHMA. Also, the user identification of RHMA is improved to eliminate the false alarm user caused by collision and blind channel estimation is considered to recover the signal on the colliding segments. The simulation results show that the improved design is able to achieve a higher collision resolution capability of RHMA.


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    Title :

    Improved Design of Resource Hopping Based Multiple Access for Grant-Free Random Access in 6G mMTC System


    Contributors:
    Zhang, Wanyue (author) / Li, Guangkai (author) / Ma, Guoyu (author) / Ma, Yiyan (author) / Wang, Wanqiao (author) / Feng, Botao (author) / Ai, Bo (author)


    Publication date :

    2024-06-24


    Size :

    783647 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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