Group Paging-Based Energy Saving for Massive MTC Accesses in LTE and Beyond Networks
Group Paging-Based Energy Saving for Massive MTC Accesses in LTE and Beyond Networks
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DOI：
10.1109/jsac.2016.2520222
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发表时间：
2016-05-01
影响因子：
16.4
通讯作者：
Taleb, Tarik
中科院分区：
文献类型：
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作者：
Arouk, Osama;Ksentini, Adlen;Taleb, Tarik
下一代蜂窝网络（5G）必须处理机器类型通信（MTC）设备的大规模部署，预期这会在无线电接入网络（RAN）和核心网络（CN）两者中引起拥塞和系统过载。此外，不仅网络将遭受系统过载，而且MTC设备将由于重传尝试而经历接入信道的高延迟和高功耗。实际上，功耗是MTC中的关键问题，因为设备没有插入电源，例如，在传感器设备的情况下。为了减轻由大规模MTC部署引起的系统过载，3GPP提出了组寻呼（GP）方法。然而，当增加被寻呼的MTC设备的数量时，其性能急剧下降。在本文中，我们设计了一种新的方法，命名为进一步改善流量分散组寻呼（FI-TSFGP），其目的是提高性能的GP时，MTC设备的数量是高的。FI-TSFGP在GP间隔上分散MTC设备的寻呼操作，而不是让所有设备几乎同时开始信道接入过程。通过这样做，FI-TSFGP实现了MTC设备的高信道接入概率，导致信道接入延迟和功耗的降低。与GP和其他两种方案相比，仿真结果清楚地表明了FI-TSFGP在以下方面的高性能：成功和冲突概率、平均接入延迟、平均前导码传输次数以及最终的能量节约。
Next generation cellular networks (5G) have to deal with massive deployment of machine-type-communication (MTC) devices, expected to cause congestion and system overload in both the radio access network (RAN) and the core network (CN). Moreover, not only would the network suffer from the system overload, but also the MTC devices would experience high latency to access the channel and high power consumption due to the retransmission attempts. Indeed, power consumption is a critical issue in MTC, as the devices are not plugged into the electrical supply, e.g., in the case of sensor devices. To alleviate system overload (caused by the massive MTC deployment), the 3GPP proposed the group paging (GP) method. However, its performances dramatically decrease when increasing the number of MTC devices being paged. In this paper, we devise a novel method, named further improvement-traffic scattering for group paging (FI-TSFGP), which aims to improve the performance of GP when the number of MTC devices is high. FI-TSFGP scatters the paging operation of the MTC devices over a GP interval instead of letting all of the devices start the channel access procedure at nearly the same time. By doing so, FI-TSFGP achieves high-channel access probability for MTC devices, leading to the reduction of both the channel access latency and power consumption. Compared to GP and two other schemes, simulation results clearly demonstrate the high performance of FI-TSFGP in terms of: success and collision probabilities, average access delay, average number of preamble transmissions, and ultimately energy conservation.