Leveraging A Variety of Anchors in Cellular Network for Ubiquitous Sensing
arxiv(2024)
摘要
Integrated sensing and communication (ISAC) has recently attracted tremendous
attention from both academia and industry, being envisioned as a key part of
the standards for the sixth-generation (6G) cellular network. A key challenge
of 6G-oriented ISAC lies in how to perform ubiquitous sensing based on the
communication signals and devices. Previous works have made great progresses on
studying the signal waveform design that leads to optimal communication-sensing
performance tradeoff. In this article, we aim to focus on issues arising from
the exploitation of the communication devices for sensing in 6G network.
Particularly, we will discuss about how to leverage various nodes available in
the cellular network as anchors to perform ubiquitous sensing. On one hand, the
base stations (BSs) will be the most important anchors in the future 6G ISAC
network, since they can generate/process radio signals with high range/angle
resolutions, and their positions are precisely known. Correspondingly, we will
first study the BS-based sensing technique. On the other hand, the BSs alone
may not enable ubiquitous sensing, since they cannot cover all the places with
strong line-of-sight (LOS) links. This motivates us to investigate the
possibility of using other nodes that are with higher density in the network to
act as the anchors. Along this line, we are interested in two types of new
anchors - user equipments (UEs) and reconfigurable intelligent surfaces (RISs).
This paper will shed light on the opportunities and challenges brought by
UE-assisted sensing and RIS-assisted sensing. Our goal is to devise a novel
6G-oriented sensing architecture where BSs, UEs, and RISs can work together to
provide ubiquitous sensing services.
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