Cooperative transmission control scheme using erasure coding for vehicular delay-tolerant networks

Data Dissemination Based on Fuzzy Logic and Network Coding in Vehicular Networks

“…Although both of them utilize backbone nodes to forward data, SFN improves the backbone selection and the backbone network construction. Firstly, SBN prefers a vehicle with slow speed to be backbone in a road segment, no matter Input: , OP , CP ; Output: NOP, DP; (1) if is a correct data packet then (2) = SOP( ) − OP ; (3) if ∃ ⊆ YP( ) satisfying decoding conditions then (4) obtain original packets SOP( ) by decoding ; (5) NOP = SOP( ) − OP ; (6) while ∃{ , } ⊆ NOP having DIR( ) ̸ = DIR( ) do (7) create a coded packet DP({ , }); (8) send DP({ , }) to +1 and −1 ; (9) send two coded packets using { , } to ; (10) NOP = NOP − { , }; (11) end (12) create coded packets DP(NOP); (13) if DIR(NOP) = 1 then (14) send DP(NOP) to +1 and ; (15) else (16) send DP(NOP) to −1 and ; (17) end (18) end (19) end (20) if is an incorrect data packet then (21) send REQ( ) to ; (22) end (23) if is REQ( ) from node then (24) if is carried by then (25) if ∃ other original packet to be sent to then (26) create one or several coded packets DP({ , }); (27) send DP({ , }) to ; (28) else (29) send to ; (30) end (31) else (32) if DIR( ) = 1 then (33) send REQ( ) to −1 ; (34) else (35) send REQ( ) to +1 ; (36) end (37) end (38) end Algorithm 1: Data coding and forwarding algorithm for primary backbone . how fast other vehicles drive; SFN chooses a vehicle with a speed close to the optimal speed in each segment.…”

“…They are designed to improve driving safety and enhance the driving experience by supporting smart applications such as collision warning, traffic congestion alarm, and sharing parking information [1][2][3]. When a collision occurs, this warning information should be immediately disseminated to those vehicles which might be affected, in order to avoid new rear-end collisions and potential traffic jams after this accident.…”