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In the existing PMIP scheme for SAE-based mobile networks such as LTE, data delivery is performed by GTP between eNB and S-GW, and also between eNBs in X2-based handover, while GRE protocol is used between S-GW and P-GW. However, the use of GTP tunnels between eNB and S-GW and between eNBs tends to induce large tunneling overhead for packets. Existing scheme also tends to incur large registration...
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