Local Cache-Enabled Mobile Augmented Reality in Mobile Edge Computing

Recently, Multi-access edge computing (MEC)-empowered mobile augmented reality (MAR) has emerged as a prominent technology domain. It highlights the disruptive potential of MEC in the context of 5G, as it empowers mobile devices (MDs) with limited local processing capabilities by offering enhanced computing power, and also significantly reduces latency. Thus, this innovation has attracted considerable attention from both industry and academia. However, the design challenge of offloading management for MAR in MEC is highly complex due to the inherent heterogeneity in computing and networking capabilities between MDs and MEC servers. Furthermore, this challenge is compounded by the integration of local cache in MDs, which aims to further reduce network latency and transmission energy consumption by bypassing the offloading process for frequently repeated detection requests. In this paper, we present a comprehensive overview of the overall process of local cache-enabled MAR in MEC and provide a thorough analysis of latency and energy considerations, taking into account the influence of various system parameters. Additionally, we propose an innovative approach to MD cache control, seeking to strike a delicate balance between the operating expenses for service providers (i.e., energy consumption at the MEC server) and the cost of MDs regarding both latency and energy consumption. Finally, we address open challenges in this field by considering cutting-edge AI technologies, such as deep reinforcement learning and super-resolution techniques as well as standardization aspects in this field. These directions represent promising avenues for future research and development.