Massive　Machine　Type　Communication　(mMTC)　is　one　application　scenario　of　5G　system　to　provide　cellular　Internet　of　Things　(IoT)　service.　Some　work　is　needed　to　provide　efficient　IoT　service　to　meet　the　requirement　of　low　power　consumption　and　coverage　extension,　since　IoT　devices　are　mainly　battery　powered　and　installed　in　a　coverage　hole.　Especially,　the　power　consumption　and　radio　resources　are　very　essential　when　data　packets　are　repeatedly　transmitted　to　compensate　the　coverage　gap.　Considering　the　available　energy　in　a　real　system　is　restricted,　this　paper　proposes　a　distributed　energy-restricted　cluster　based　transmission　scheme　for　mMTC/IoT　data　transmission,　according　to　the　geo-locations　of　IoT　devices　to　optimize　the　transmission　efficiency.　The　simulation　results　show　that　the　proposed　transmission　scheme　with　a　cluster　size　limitation　can　reduce　the　power　consumption　at　IoT　devices　and　improve　the　radio　resource　efficiency　of　the　system,　compared　with　the　conventional　centralized　scheduling　algorithm.　©　2020　IEEE.