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Spectral coexistence of 5G networks and satellite communication systems enabled by coordinated caching and QoS-aware resource allocation
Abstract
The combination of underlay spectrum sharing and coordinated multi-point technologies promises substantial spectral efficiency (SE) gains for 5G cellular networks. In this work, we present a family of simple cooperative mobile edge caching strategies that create joint transmission (JT) opportunities and make use of the non-computational-demanding score-gated least recently used (SG-LRU) caching scheme to achieve high cache hit rate, thus increasing the sum-SE and reducing both the backhaul traffic and the content access latency. In addition, we derive a low-complexity coordinated quality-of-service (QoS) aware resource allocation scheme that maximizes the sum-SE of coordinated beamforming (CBF) under given transmission power per base station, inter-system interference power, and per-user QoS constraints as well as simple alternatives for both CBF and JT. We consider a use case where a cellular network coexists with a fixed satellite service earth station in the 3.7-4.2 GHz C-band. Numerical simulations illustrate the performance gains of the proposed coordinated caching and resource allocation strategies and shed light on the impact of various parameters on their efficiency.</p- contributionToPeriodical
- Cooperative content caching redundancy enhancement (C3RE)
- Coordinated Multi-Point (CoMP)
- Coordinated QoS-aware interference-constrained PA (CQA-ICPA)
- Interference-constrained equal power allocation (ICEPA)
- Score-gated least-recently used (SG-LRU)
- /dk/atira/pure/subjectarea/asjc/1700/1711; name=Signal Processing
- /dk/atira/pure/subjectarea/asjc/2200/2208; name=Electrical and Electronic Engineering