New Constrained Application Protocol (CoAP) Block-Wise Transfer Options

This document specifies new Constrained Application Protocol (CoAP) Block-Wise transfer options: Block3 and Block4 options. These options are similar to the CoAP Block1 and Block2 options, but enable faster transmissions of big blocks of data with less packet interchanges as well as supporting faster recovery should any of the Blocks get lost in transmission.