Non-Symmetric Coded Caching for Location-Dependent Content Delivery

TL;DR

This paper introduces a location-based coded caching scheme using nested code modulation to improve data delivery efficiency and uniform quality of experience in wireless immersive applications.

Contribution

It proposes a novel location-dependent cache placement and delivery scheme leveraging nested code modulation for multi-rate multicasting.

Findings

Significantly increases transmission efficiency.

Provides uniform quality of experience across locations.

Outperforms existing methods in numerical simulations.

Abstract

Immersive viewing is emerging as the next interface evolution for human-computer interaction. A truly wireless immersive application necessitates immense data delivery with ultra-low latency, raising stringent requirements for next-generation wireless networks. A potential solution for addressing these requirements is through the efficient usage of in-device storage and computation capabilities. This paper proposes a novel location-based coded cache placement and delivery scheme, which leverages the nested code modulation (NCM) to enable multi-rate multicasting transmission. To provide a uniform quality of experience in different network locations, we formulate a linear programming cache allocation problem. Next, based on the users' spatial realizations, we adopt an NCM based coded delivery algorithm to efficiently serve a distinct group of users during each transmission. Numerical results demonstrate that the proposed location-based delivery method significantly increases transmission efficiency compared to state of the art.