In this paper, we investigate the performance of MMR system in non-transparent mode. The IEEE 802.16j MMR system has two mode of operation, single-frame mode and multi-frame mode. In the analysis, we assume that channel interference between MR-BS and RS, or between RSs anywhere in the given area is negligible. The performance is presented in terms of frame efficiency by varying number of RS and BS coverage to RS coverage ratio and maximum coverage area of a BS by varying traffic density. Analytical results show that the single-frame mode is more efficient than multi-frame mode in frame efficiency and coverage extension.