Table 1 Meaning of delay notifications
From: A low-latency communication protocol for target tracking in wireless sensor networks
Notification | Meaning |
|---|---|
T c o m−p r o t o c o l | Delay produced by the communication protocol |
T c l u s t e r | Delay produced within the cluster |
T t r a n s m i s s i o n | Delay produced by relaying data from the CH to the BS |
\(t_{r_{i}}\) | Time at each hop for transmitting data to the next hop |
\(t_{\textit {strobe\_TxTime}}\) | Time for sending a strobe, including the medium access delay |
\(t_{\textit {ACK\_TxTime}}\) | Time for sending a DATA_TO_BS packet, including the medium access delay |
\(t_{\textit {DATA\_TO\_BS\_TxTime}}\) | Time for sending a DATA_TO_BS packet, including the medium access delay |
\(t_{\textit {ENERGY\_INFO\_TxTime}}\) | Time for sending an ENERGY_INFO packet, including the medium access delay |
t B O | Back-off period in seconds |
t T A | Turn-around time |
t C C A | Time for clear channel assignment |
t f r a m e | Transmission time for payload data |
t L I F S and t S I F S | CSMA interframe spacing |
SP | Duration of one symbol |
nStrobe | Number of strobes used for waking up the receiver |
t strobePeriod | Time for sending one strobe |
B O s l o t s | Number of back-off slots |
t B O s l o t s | Time for a back-off slot |
BE | Back-off exponent |
n | Number of hops towards the BS |
\(t_{\textit {LongPreamble\_TxTime}}\) | Time for sending a long preamble packet, including the medium access delay |
\(t_{\textit {REQ\_RELAY\_TxTime}}\) | Time for sending a REQ_RELAY packet, including the medium access delay |