Intra-body　communication　(IBC)　is　a　new,　emerging,　short-range　and　human　body　based　communication　methodology.　It　is　a　technique　to　network　various　devices　on　human　body,　by　utilizing　the　conducting　properties　of　human　tissues,　suitable　for　currently　fast　developing　Body　area　network　(BAN)/Body　sensor　network　(BSN).　IBC　is　believed　to　have　advantages　in　power　consumption,　electromagnetic　radiation,　interference　from　external　electromagnetic　noise,　security,　and　restriction　in　spectrum　resource.　In　this　article,　the　authors　develop　two　models,　which　are　analytical　and　empirical　approaches,　for　comparing　the　performance　and　accuracy　of　IBC　on　a　human　limb.　Through　in　vivo　experiment　of　five　volunteers,　both　models　basically　match　with　the　experimental　result　with　equivalent　circuit　model　superior　than　electromagnetic　model　in　term　of　maximum　error.