This paper investigates the performance of reconfigurable intelligent surface assisted two-way non-orthogonal multiple access (RIS-TW-NOMA) networks, where a pair of users exchange their information through a RIS. The influence of imperfect successive interference cancellation on RIS-TW-NOMA is taken into account. To evaluate the potential performance of RIS-TW-NOMA, we derive the exact and asymptotic expressions of outage probability and ergodic rate for a pair of users. Based on the analytical results, the diversity orders and high signal-to-noise ratio (SNR) slopes are obtained in the high SNR regime, which are closely related to the number of RIS elements. Additionally, we analyze the system throughput and energy efficiency of RIS-TW-NOMA networks in both delay-limited and delay-tolerant transmission modes. Numerical results indicate that: 1) The outage behaviors and ergodic rate of RIS-TW-NOMA are superior to that of RIS-TW-OMA and two-way relay OMA (TWR-OMA); 2) As the number of RIS elements increases, the RIS-TW-NOMA networks are capable of achieving the enhanced outage performance; and 3) By comparing with RIS-TW-OMA and TWR-OMA networks, the energy efficiency and system throughput of RIS-TW-NOMA has obvious advantages.

翻译：本文调查了可重新整合的智能表面辅助双向、非正反向多存取(RIS-TW-NOMA)网络的性能,在这种网络中,一对用户通过RIS交换信息。考虑到对RIS-TW-NOMA连续取消干扰的不完善影响。为了评价RIS-TW-NOMA的潜在性能,我们得出了对一对用户来说,RIS-TW-NOMA的超常概率和超常率的准确和无症状表现。根据分析结果,在高SNR制度中获得了多样性订单和高信号对信号斜度(SNR),这与RIS-TR-NOMA的要素的数目密切相关。此外,我们分析了RIS-TR-NOMA网络在延迟限制和延迟容忍性传输模式中的潜在性能和能效。 数字-OMA的异常行为和双向中继系统(TRISA-NOMA)的明显性能增长。