  The use of white and black listing techniques in Wireless Sensor Networks
(WSN), and in particular those which are based on the Time Slotted Channel
Hopping (TSCH) operating mode of IEEE 802.15.4, permits to improve reliability
and latency by performing transmissions on the best channels. Techniques that
operate on a per-link basis are deemed quite effective, but proper operation
requires that the two end points involved in the communication agree on the
channels to be used for transmission. On the contrary, communication in the
network can be prevented, eventually leading, in the worst cases, to the
disconnection of part of the nodes. This paper presents CONSIP, a technique
aimed to ensure strict consistency in the information exchanged between the
nodes and used to drive communication, by preventing a prior the aforementioned
problem from occurring. Results show a slight increase in energy consumption,
due to the use of a backup cell, whereas communication latency does not worsen.
The effectiveness of CONSIP was assessed by means of an experimental campaign,
and the only drawback we found is that the backup cell, which is required to be
reserved per link, may limit the number of nodes in dense networks.
