In our current approaches, we aggregate the IoT messages that have the same IP and UDP headers to form an N-packet shown in Figure 2. For an N-packet, we consider the payloads aggregated from the N consecutive IoT packets as a header called agg (Figure 2 (c)). That is, the n-th header field msgn is the payload of the n-th IoT message (in this example, 1 ≤ n ≤ N = 8).