N |
The set of all sensor nodes |
Psq |
The set of all candidate paths by which data source node s can connect to the sink node q
|
S |
The set of all data source nodes |
h |
The maximum among all the shortest path distances from each of the data source nodes to the sink node |
M |
An arbitraryly large number |
A |
Maximum link delay |
B |
Maximum end-to-end delay |
δp(n,k) |
The indicator function which is 1 if link (n, k) is on path p and 0 otherwise |
dnk |
Euclidean distance between node n and node k
|
tdata |
Transmission time for transmitting a data packet |
RTS |
Transmission time for an RTS frame |
CTS |
Transmission time for a CTS frame |
SIFS |
Short inter-frame space time |
DIFS |
Distributed inter-frame space time |
Θ |
Maximum propagation delay for transmitting data packets |
λ |
Packet arrival rate |
q |
The sink node |
Rn |
The set of all possible transmission radii that node n can adopt, which is a set of discrete elements |
en(rn) |
Energy consumption function of node n, which is a function of node n's transmission radius |
Eidle |
Energy consumption per unit time when sensor nodes are operating in the idle mode |
B̄ |
Average random back-off time |
N̄ |
Average network allocation vector (NAV) |
T |
Maximum number of times for retransmissions |