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Table 4 The rules of selecting next hop head node

From: A virtual grid-based real-time data collection algorithm for industrial wireless sensor networks

DN of current head node Transmission direction Row selected table in neighbor
1 Bottom left LD
2 Bottom right RD
3 Top right RU
4 Top left LU
5 Down DG
6 Right RG
7 Up UG
8 Left LG
0 (Broadcast in local grid) /