With　the　progress　of　Internet　of　Things　(IoT)　services,　especially　the　industrial　IoT　(IIoT)　service,　and　personal　consumption　by　wearable　devices,　the　requirement　from　the　perspective　of　capability,　reliability　and　latency　for　consumer　scenarios　(e.g.,　AR/VR)　and　industry　scenarios　becomes　more　and　more　stringent.　Due　to　limited　uplink　(UL)　transmission　power,　especially　for　the　new　radio　reduced　capability　(NR-RedCap)　devices　and　wearable　devices,　UL　transmission　would　be　a　bottleneck.　In　this　paper,　in　order　to　increase　the　coverage　and　decrease　the　latency　at　the　same　time,　a　new　transmission　mechanism　based　on　an　adaptive　user　equipment　(UE)　aggregation,　i.e.,　a　multi-path　transmission,　is　discussed,　wherein　multiple　devices　are　aggregated　to　increase　UL　power　and　explore　the　diversity　gain.　According　to　the　quality　of　radio　link　between　UEs　and　base　station　(BS),　data　transmission　can　be　a　single　path　based　on　an　indirect　link　or　direct　link,　or　over　multiple　paths　from　multiple　transmission　nodes.　The　procedure　to　support　such　UE　aggregation　based　transmission　is　also　designed.　The　performance　gain　is　provided　and　discussed　in　detail　to　verify　the　benefit　of　the　proposed　mechanism.　This　paper　helps　to　identify　main　difference　under　different　cooperation　schemes　and　provide　an　insight　into　UE　aggregation　based　transmission.　　©　2023　IEEE.