In this paper, we analyze inner and outer bounding capacity region of two-user multiple-access relay channel (MARC) with side information (SI) non- causally known at one encoder in different scenarios. First, we obtain a general capacity inner bound includ- ing various previous results as its special cases, where, the informed encoder transmits two-layer individual de- scription of side information to the relay and desti- nation, and block Markov, superposition, Marton and Gel’fand-Pinsker coding at the encoders and sliding- window decoding at the receiver are exploited. This individual side information can be considered as the partial SI at the relay and destination, which can po- tentially increase the transmission rates, especially for the uninformed encoder. Second, to show practical im- portance of the obtained inner bound, we extend it to the Gaussian version, which can be used in studying the coverage region and energy efficiency. Third, we study outer bounding the capacity region, aiming at outer bounds less than cut set bounds, by considering a general MARC with partial decode and forward (PDF) strategy at the relay. Finally, the obtained Gaussian inner bound is evaluated numerically, and we showed that our capacity inner bound results in more sum-rate in comparison with the previous studies.

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