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Table 1 Main characteristics of caching-based transport protocols

From: Routing metrics for cache-based reliable transport in wireless sensor networks

Protocol Direction Xcast ARQ Packet Symmetric reverse
     recovery route
RMST Any Ucast Selective repeat Optional, Desirable
    w/ NACK store-and-forward  
PSFQ Sink-to-sensor Bcast Selective repeat Store-and-forward N/A
    w/ NACK   
DTC Any Ucast TCP SACK Probabilistic caching Desirable
     + E2E  
Wisden Sensor-to-sink Ucast Selective repeat Probabilistic caching Desirable
    w/ NACK + E2E  
RCRT Sensor-to-sink Ucast Selective repeat Probabilistic caching Desirable
w/ cache [15]    w/ NACK + ACK + E2E  
RTMC Any Ucast Selective repeat Store-and-forward Mandatory
    w/ NACK + implicit ACK   
A2RT Actor-to-actor Ucast Depends on selected Store-and-forward Desirable
    transport + E2E  
DTSN Any Ucast Selective repeat Probabilistic caching Desirable
    w/ NACK + ACK + E2E