Towards Terabit LiFi Networking
Towards Terabit LiFi Networking
复制标题
迈向太比特 LiFi 网络
DOI：
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
J. Elmirghani
中科院分区：
文献类型：
--
作者：
A. Qidan;T. El;J. Elmirghani
光保真（Li-Fi）是光无线通信（OWC）的网络版本，它是满足不久的将来用户流量预期前所未有的增长的强有力的候选者。在OWC中，大量的光接入点（AP）通常被部署在室内环境的天花板上，以服务于具有不同需求的多个用户。尽管OWC网络具有高数据速率，但由于使用光学频带进行数据传输，它们不能取代当前的射频（RF）无线网络，其中OWC具有若干问题，包括光学AP的小会聚区域、缺乏上行链路传输和高阻塞概率。然而，OWC具有支持下一代（6 G）无线通信的需求的潜力。在这种情况下，异构光/RF网络可以被认为是克服OWC和RF系统的局限性，同时在可实现的数据速率和覆盖范围方面提供高质量的服务。在这项工作中，红外激光器，垂直腔面发射（VCSEL）激光器，被用作光学AP的关键元件，为多个用户提供服务。然后，传输方案，如迫零（ZF）和盲干扰对齐（BIA）被引入到管理多用户干扰和最大化的用户的和速率。此外，WiFi系统被认为提供上行链路传输并服务于经历来自光学系统的低信噪比（SNR）的用户。为了有效地利用异构光/射频网络的资源，我们推导出一个基于效用的目标函数，旨在最大限度地提高网络的总速率。
Light Fidelity (Li-Fi) is a networked version of optical wireless communication (OWC), which is a strong candidate to fulfill the unprecedented increase in user-traffic expected in the near future. In OWC, a high number of optical access points (APs) is usually deployed on the ceiling of an indoor environment to serve multiple users with different demands. Despite the high data rates of OWC networks, due to the use of the optical band for data transmission, they cannot replace current radio frequency (RF) wireless networks where OWC has several issues including the small converge area of an optical AP, the lack of uplink transmission and high blockage probabilities. However, OWC has the potential to support the requirements in the next generation (6G) of wireless communications. In this context, heterogeneous optical/RF networks can be considered to overcome the limitations of OWC and RF systems, while providing a high quality of service in terms of achievable data rates and coverage. In this work, infrared lasers, vertical-cavity surface-emitting(VCSEL) lasers, are used as the key elements of optical APs for serving multiple users. Then, transmission schemes such as zero forcing (ZF) and blind interference alignment (BIA) are introduced to manage multi-user interference and maximize the sum rate of users. Moreover, a WiFi system is considered to provide uplink transmission and serve users that experience a low signal to noise ratio (SNR) from the optical system. To use the resources of the heterogeneous optical/RF network efficiently, we derive a utility-based objective function that aims to maximize the overall sum rate of the network.
影响因子：
3.9
作者：
Ahmad, Rizwana;Soltani, Mohammad Dehghani;Das, Abir
通讯作者：
Das, Abir