论文标题
MTC中两种不同类型的设备的NOMA的分层前置放大器随机访问
Random Access with Layered Preambles based on NOMA for Two Different Types of Devices in MTC
论文作者
论文摘要
在机器类型通信（MTC）中，已使用许多设备和传感器使用随机访问，以使用序列池访问上行链路通道。为了支持各种服务质量（QoS）要求，可以通过多个池进行概括，这可能会导致较低的光谱效率。在本文中，为了高光谱效率，提出了分层前序（RALP）的随机访问，以支持具有两个不同优先级的设备，该设备基于功率域非正交多访问（NOMA）的概念。在RALP中，两组设备，即类型1和2型设备，受到不同优先级的支持，其中1型设备的优先级高于类型2设备。封闭形式表达式是用于通过1型设备传输的前序的检测性能的检测性能，可用于高优先级的1型设备的一定性能保证。还讨论了低复杂性序言检测方法。
In machine-type communication (MTC), random access has been employed for a number of devices and sensors to access uplink channels using a pool of preambles. To support different priorities due to various quality-of-service (QoS) requirements, random access can be generalized with multiple pools, which may result in low spectral efficiency. In this paper, for high spectral efficiency, random access with layered preambles (RALP) is proposed to support devices with two different priorities based on the notion of power-domain non-orthogonal multiple access (NOMA). In RALP, two groups of devices, namely type-1 and type-2 devices, are supported with different priorities, where type-1 devices have higher priority than type-2 devices. Closed-form expressions are derived for the detection performance of preambles transmitted by type-1 devices, which can be used for a certain performance guarantee of type-1 devices of high priority. Low-complexity preamble detection methods are also discussed.
