From: An unequal redundancy level-based mechanism for reliable data collection in wireless sensor networks
parameter | Meanings |
---|---|
p c | Link loss rate |
p e | End-to-end reliability of data packets |
m i | The redundancy level for nodes in the i th loop under URL scheme |
m | The nodes’ redundancy level of each loop under ERL scheme |
p | The reliability to next hop under ERL scheme |
p i | The reliability of the i th loop to next hop under URL scheme |
\( \widehat{N} \) | The amount of data of each packet in linear network |
\( {\widehat{N}}_m \) | The number of data transmission to next hop in linear network |
\( {\zeta}_{{}_l}^{e,t} \) | The transmit data sizes for the nodes that are l distance to sink under ERL scheme |
\( {\zeta}_{{}_l}^{e,r} \) | The received data sizes for the nodes that are l distance to sink under ERL scheme |
\( {E}_{{}_l}^e \) | The energy consumption of the nodes that are l distance to sink under ERL scheme |
\( {\zeta}_{{}_l}^{u,t} \) | The transmit data sizes for the nodes that are l distance to sink under URL scheme |
\( {\zeta}_{{}_l}^{u,r} \) | The received data sizes for the nodes that are l distance to sink under URL scheme |
\( {E}_{{}_l}^u \) | The energy consumption of the nodes that are l distance to sink under URL scheme |
ϕ | The percentage of enhancing the reliability |
Ω | The percentage of prolonging the network lifetime |
\( {R}_{D_{URL}} \) | The network latency incurred by URL scheme |