The demand for multimedia services is growing day by day in vehicular ad-hoc networks (VANETs), resulting in high spectral usage and network congestion. Non-orthogonal multiple access (NOMA) is a promising wireless communication technique to solve the problems related to spectral efficiency effectively. The index coding (IC) is a powerful method to improve spectral utilization, where a sender aims to satisfy the needs of multiple receivers with a minimum number of transmissions. By combining these two approaches, in this work, we propose a novel technique called index coded NOMA (IC-NOMA), where we apply NOMA techniques on index coded data to reduce the number of transmissions further. This work shows that the IC-NOMA system demands a specific design for index codes to reap the advantages of NOMA. We have done the feasibility analysis of the proposed method in a general scenario and proposed an index code design to integrate IC over NOMA for the best efficiency. Through detailed analytical studies it is validated that the proposed transmission system provides improved spectral efficiency and power saving compared to conventional IC systems.
翻译:对多媒体服务的需求日复一日地增加,这导致高光谱使用和网络拥堵。非正统多重访问(NOMA)是一种有希望的无线通信技术,可以有效解决光谱效率方面的问题。索引编码(IC)是改进光谱利用的有力方法,发送者的目的是满足多接收器的需要,其传输量最少。通过将这两种方法结合起来,我们提出了一种叫作索引编码的NOMA(NOMA)的新技术,我们在此过程中应用NOMA技术来进一步减少传输量。这项工作表明,IC-NOMA系统要求为索引编码设计具体设计,以获得NOMA的优势。我们已对总体设想中的拟议方法进行了可行性研究,并提议了一种索引编码设计,将IC相对于NOMA(NOMA)的传输量最小化。通过详细的分析研究,我们验证了拟议的传输系统与常规的IC系统相比,能够提供更好的光谱效率和节能。