In　order　to　improve　the　manageability　and　adaptability　of　future　5G　wireless　networks,　the　software　orchestration　mechanism,　named　software　defined　networking　(SDN)　with　control　and　user　plane　(C/U-plane)　decoupling,　has　become　one　of　the　most　promising　key　techniques.　Based　on　these　features,　the　hybrid　satellite　terrestrial　network　is　expected　to　support　flexible　and　customized　resource　scheduling　for　both　massive　machinetype-communication　(MTC)　and　high-quality　multimedia　requests　while　achieving　broader　global　coverage,　larger　capacity　and　lower　power　consumption.　In　this　paper,　an　end-to-end　hybrid　satellite　terrestrial　network　is　proposed　and　the　performance　metrics,　e.g.,　coverage　probability,　spectral　and　energy　efficiency　(SE　and　EE),　are　analysed　in　both　sparse　networks　and　ultra-dense　networks.　The　fundamental　relationship　between　SE　and　EE　is　investigated,　considering　the　overhead　costs,　fronthaul　of　the　gateway　(GW),　density　of　small　cells　(SCs)　and　multiple　quality-ofservice　(QoS)　requirements.　Numerical　results　show　that　compared　with　current　LTE　networks,　the　hybrid　system　with　C/U　split　can　achieve　approximately　40%　and　80%　EE　improvement　in　sparse　and　ultra-dense　networks　respectively,　and　greatly　enhance　the　coverage.　Various　resource　management　schemes,　bandwidth　allocation　methods,　and　on-off　approaches　are　compared,　and　the　applications　of　the　satellite　in　future　5G　networks　with　software　defined　features　are　proposed.