Literature Database Entry

angjo2026risilience

Joana Angjo, Anatolij Zubow and Falko Dressler, "RISilience: Resilience-Oriented Placement of Reflecting Surfaces Under Dynamic Blockages," Proceedings of IEEE Global Communications Conference (GLOBECOM 2026), 2nd GLOBECOM Workshop on Resilience in Next-Generation Wireless Communication Networks (ResNets 2026), Macao, China, December 2026. (to appear)

Abstract

Despite growing interest in reconfigurable intelligent surfaces (RIS) for coverage and resilience, their integration into existing wireless networks remains challenging. While most works rely on continuous phase adaptation and real-time control, we investigate statically-configured RIS (SC-RIS), which are set up once during link initialization, thereby reducing the control overhead associated with dynamically reconfigurable RIS. By strategically placing multiple SC-RIS based on expected blockage patterns in highly mobile environments, path diversity can be increased in otherwise sparse channels. Using ray-tracing simulations in Sionna RT to model urban environments with stochastic vehicular traffic, we formulate an outage-constrained optimization problem. The objective is to determine the minimum number and placement of SC-RIS such that the received signal to noise ratio (SNR) remains above a target threshold except a small outage probability during the communication interval. This problem is combinatorial and NP-hard, so we adopt a heuristic that evaluates candidate paths, selects weakly correlated ones in terms of blockages, and iteratively chooses the ones that minimize outage probability. In a Manhattan grid scenario at sub-6 GHz under non-line-of-sight (NLOS) conditions, our optimization selects 1, 3 and 4 surfaces to ensure an outage probability of 10−2 under low, moderate, and high traffic, respectively. In contrast, randomly chosen subsets of about 4 and 10 surfaces are required under low and moderate traffic, and fail to reach the target under high traffic, saturating at 4 x 10−2 even with 15 surfaces. Placement therefore matters more than count: additional surfaces yield diminishing returns once they duplicate correlated paths.

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Joana Angjo
Anatolij Zubow
Falko Dressler

BibTeX reference

@inproceedings{angjo2026risilience,
    author = {Angjo, Joana and Zubow, Anatolij and Dressler, Falko},
    note = {to appear},
    title = {{RISilience: Resilience-Oriented Placement of Reflecting Surfaces Under Dynamic Blockages}},
    publisher = {IEEE},
    address = {Macao, China},
    booktitle = {IEEE Global Communications Conference (GLOBECOM 2026), 2nd GLOBECOM Workshop on Resilience in Next-Generation Wireless Communication Networks (ResNets 2026)},
    month = {12},
    year = {2026},
   }
   
   

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Last modified: 2026-10-04