5.1.4.1.0  General 5.1.4.1.1  Impacts on existing nodes or functionality  Word-p. 18

5.1.4.2.1  General description 5.1.4.2.2  Solution 1: Triggering via NAS signalling 5.1.4.2.3  Solution 2: Solution for fake SMS triggering from normal UE in the same network as UE used only for MTC  Word-p. 19 5.1.4.2.4  Solution 3: Solutions protecting SMS triggering  Word-p. 20 5.1.4.2.5  Solution 4: Triggering via User plane  Word-p. 21 5.1.4.2.6  Solution 5: Using GBA Push to secure Device triggering procedure over Tsp and T4 5.1.4.2.7  Solution 6: Secure Trigger Delivery with Security Association between MTC-IWF and UE  Word-p. 24 5.1.4.2.8  Solution 7: Using regular GBA and GPL to secure Device triggering procedure over Tsp and T4 5.1.4.2.9  Solution 8: Using GBA Push to secure Device triggering procedure over Tsms  Word-p. 26 5.1.4.2.10  Impacts on existing nodes or functionality  Word-p. 28