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arXiv 2012.13537eess.SPcs.NI
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一种基于LSTM的6 G机器类型通信网络混合随机接入方案

An LSTM-Aided Hybrid Random Access Scheme for 6G Machine Type Communication Networks

Wenchao Zhai, Huimei Han, Lei Liu, Jun Zhao

摘要:

针对大规模机器类型通信(mMTC)设备和超可靠低延迟通信(URLLC)设备共存的6 G MTC网络,提出了一种LSTM-Aided混合随机接入方案(LSTMH-RA),以支持不同的服务质量(QoS)需求。在所提出的LSTMH-RA方案中,mMTC设备经由定时提前(TA)辅助的四步过程来接入网络以满足大规模接入需求,而URLLC设备的接入过程与mMTC设备的接入过程耦合在两个步骤中完成以减少延迟。此外,我们提出了一种基于注意力的LSTM预测模型来预测活动URLLC设备的数量,从而确定多用户检测算法的参数,以保证URLLC设备的延迟和可靠性访问要求。分析了LSTMH-RA方案的成功接入概率。仿真结果表明,与基准方案相比,所提LSTMH-RA方案能够显著提高成功接入概率,从而满足URLLC和mMTC设备的不同QoS需求.

英文摘要:

In this paper, an LSTM-aided hybrid random access scheme (LSTMH-RA) is proposed to support diverse quality of service (QoS) requirements in 6G machine-type communication (MTC) networks, where massive MTC (mMTC) devices and ultra-reliable low latency communications (URLLC) devices coexist. In the proposed LSTMH-RA scheme, mMTC devices access the network via a timing advance (TA)-aided four-step procedure to meet massive access requirement, while the access procedure of the URLLC devices is completed in two steps coupled with the mMTC devices' access procedure to reduce latency. Furthermore, we propose an attention-based LSTM prediction model to predict the number of active URLLC devices, thereby determining the parameters of the multi-user detection algorithm to guarantee the latency and reliability access requirements of URLLC devices. We analyze the successful access probability of the LSTMH-RA scheme. Numerical results show that, compared with the benchmark schemes, the proposed LSTMH-RA scheme can significantly improve the successful access probability, and thus satisfy the diverse QoS requirements of URLLC and mMTC devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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