Task-Oriented Sensing, Computation, and Communication Integration for
Multi-Device Edge AI
- URL: http://arxiv.org/abs/2207.00969v1
- Date: Sun, 3 Jul 2022 06:57:07 GMT
- Title: Task-Oriented Sensing, Computation, and Communication Integration for
Multi-Device Edge AI
- Authors: Dingzhu Wen, Peixi Liu, Guangxu Zhu, Yuanming Shi, Jie Xu, Yonina C.
Eldar, and Shuguang Cui
- Abstract summary: This paper studies a new multi-intelligent edge artificial-latency (AI) system, which jointly exploits the AI model split inference and integrated sensing and communication (ISAC)
We measure the inference accuracy by adopting an approximate but tractable metric, namely discriminant gain.
- Score: 108.08079323459822
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: This paper studies a new multi-device edge artificial-intelligent (AI)
system, which jointly exploits the AI model split inference and integrated
sensing and communication (ISAC) to enable low-latency intelligent services at
the network edge. In this system, multiple ISAC devices perform radar sensing
to obtain multi-view data, and then offload the quantized version of extracted
features to a centralized edge server, which conducts model inference based on
the cascaded feature vectors. Under this setup and by considering
classification tasks, we measure the inference accuracy by adopting an
approximate but tractable metric, namely discriminant gain, which is defined as
the distance of two classes in the Euclidean feature space under normalized
covariance. To maximize the discriminant gain, we first quantify the influence
of the sensing, computation, and communication processes on it with a derived
closed-form expression. Then, an end-to-end task-oriented resource management
approach is developed by integrating the three processes into a joint design.
This integrated sensing, computation, and communication (ISCC) design approach,
however, leads to a challenging non-convex optimization problem, due to the
complicated form of discriminant gain and the device heterogeneity in terms of
channel gain, quantization level, and generated feature subsets. Remarkably,
the considered non-convex problem can be optimally solved based on the
sum-of-ratios method. This gives the optimal ISCC scheme, that jointly
determines the transmit power and time allocation at multiple devices for
sensing and communication, as well as their quantization bits allocation for
computation distortion control. By using human motions recognition as a
concrete AI inference task, extensive experiments are conducted to verify the
performance of our derived optimal ISCC scheme.
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