|
| Existing protocol | Strength | Weakness |
|
| IVG | (1) Mitigates broadcast storm problem
(2) Efficient in fragmented network
(3) Distributed algorithm | (1) Just functions in highway scenario
(2) Requires accurate GPS information
(3) Periodically rebroadcasts safety message |
|
| DRG | (1) Distributed algorithm
(2) Mitigates broadcast storm problem | (1) Data dissemination may be slow because of ZoF
(2) Mitigates network fragmentation periodically which causes high reception overhead |
|
| DV-CAST | (1) Distributed framework
(2) Mitigates broadcast storm problem and network fragmentation in a single framework
(3) Efficient for safety emergency applications | (1) Just functions in straight highways
(2) Highly dependable on position and direction information of vehicles gathered from GPS |
|
| Mobicast | (1) Mitigates broadcast storm problem
(2) Efficient in fragmented network | (1) Just functions in highway scenario
(2) Complicated mechanism to select vehicles in Zof and ZoR |
|
| SRD | (1) Simplicity
(2) Mitigates broadcast storm problem and fragmented network problem simultaneously | (1) Just functions in highway scenario
(2) Not reliable for safety messages |
|
| EAEP | (1) No beacon exchange
(2) Mitigates broadcast storm problem | (1) Just functions in highway scenario
(2) Assumes end to end connection between vehicles |
|
| UV-CAST | (1) Mitigates broadcast storm problem and network fragmentation
(2) Considers two different levels for communication range which is more realistic assumption | (1) High complexity because of gift-wrapping algorithm
(2) Just functions in urban scenario
(3) Assigns task of store carry forward to different vehicles |
|
| EDB | Receiver based decision | (1) Just functions in highway scenario
(2) Fixed antenna direction with beam width of about 30 degree |
|
| Streetcast | By utilizing digital map, streetcast is a fast and accurate broadcast protocol | No specific method for fragmented network condition |
|
| POCA | (1) Eliminates broadcast storm problem and network fragmentation
(2) Functions in different network scenarios such as highway and urban | (1) Utilizes 2-hop neighbor information
(2) Very high reception overhead |
|
| DECA | (1) Functions in different network scenarios such as highway and urban
(2) Mitigates broadcast storm problem and network fragmentation problem | (1) Selects relay vehicle based on random waiting time
(2) Requires knowledge of 2-hop neighbors. |
|
| Ack-PBSM | Functions in different network scenarios such as highway and urban | (1) Data dissemination speed may be slow because of using CDs
(2) Not efficient for safety emergency messages |
|
