BUPTCMCC-6G-CMG+: A GBSM-Based ISAC Standard Channel Model Generator

TL;DR

This paper introduces a GBSM-based channel model generator for integrated sensing and communication (ISAC) in 6G, aligning with 3GPP standards, and validates its ability to realistically simulate channel features including angle, delay, and radar cross section.

Contribution

It proposes a unified, compatible ISAC channel model generator based on GBSM, extending existing 5G models and standardization efforts for 6G.

Findings

Model accurately characterizes channel concatenation features.

Simulation validates realistic RCS representation.

Compatible with 3GPP Release 19 standards.

Abstract

Integrated sensing and communication (ISAC) has been recognized as the key technology in the vision of the sixth generation (6G) era. With the emergence of new concepts in mobile communications, the channel model is the prerequisite for system design and performance evaluation. Currently, 3GPP Release 19 is advancing the standardization of ISAC channel models. Nevertheless, a unified modeling framework has yet to be established. This paper provides a simulation diagram of ISAC channel modeling extended based on the Geometry-Based Stochastic Model (GBSM), compatible with existing 5G channel models and the latest progress in the 3rd Generation Partnership Project (3GPP) standardization. We first introduce the progress of the ISAC channel model standardization in general. Then, a concatenated channel modeling approach is presented considering the team's standardization proposals, which is implemented on the BUPTCMCC-6G-CMG+ channel model generator. We validated the model in cumulative probability density function (CDF) in statistical extension of angle and delay, and radar cross section (RCS). Simulation results show that the proposed model can realistically characterize the feature of channel concatenation and RCS within the ISAC channel.