
Network Protocol Design of M2M-Based Cooperative Relaying 167
Relay table
CostNo.
BC–B
Relay table
CostNo.
C B–C
C
Routing table
Exchange
A
B
FIGURE 11.3 An example of building up relay tables.
100 m region, with 12 surrounding nodes in the peripheral area. As shown in
Figure 11.4(a), according to the number of hops to the root, the surrounding
nodes can be divided into two categories based on the RPL routing protocol,
namely the rank 1 nodes 2–5 and the rank 2 nodes 6–13. Note that the solid
lines are next-hop links and the dashed lines are relay links, as discussed
in Section 11.3. Throughout the simulation, we set the path-loss exponent
α =3, the data rate ...