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Table 1 Notations

From: Multi-hop transmission and routing with hierarchical modulation

Series

Parameter

S

current state

S’

next state

S , i

a set of packets stored in node i at State S

m

4/m-QAM hierarchical modulation (m = 16, m = 64)

λ

constellation priority parameter

p k

packet index (1: basic layer, 2:secondary layer # 1, 3: secondary layer # 2)

t

transmitter

r 1 t

receiver close to the transmitter

r 2 t

receiver far from the transmitter