Dids
Well-known member
- First Name
- Les
- Joined
- Dec 21, 2019
- Threads
- 8
- Messages
- 1,766
- Reaction score
- 3,771
- Location
- Massachusetts
- Vehicles
- 04 Tacoma, 23 Cybertruck
- Occupation
- Self
I have not read the 3ggp standards since version 14 but at that time Proximity Services and especially Vehicle to Vehicle had very low latency in the order of micro seconds. I think ProSe is an island head arrangement with a modem broadcasting services or requesting service and is independent of the tower which is always the controller. My Samsung Note 10 modem is mimo and has the hardware but ProSe is disabled by the network for security and because they have no way of profiting from it. I am fairly certain DOD and DOT use LTE, I know homeland security does and if I could sign on the emergency services AP LTE direct would be enabled. The V2V @SwampNut is talking about is LTE direct, or at least the Vehicle to Everything that replaced V2V isThat also looks like a viable option for setting up comms between vehicles. I haven't seen that variation before. The range is pretty limited for LTE, do you know if it will work at the same time as connecting to a tower to get data as well? There's obviously also the cellular telemetry path, but there's no way to guarantee package delivery, let alone latency through a tower or network.
The question I suppose is how fast it connects/reconnects, and how dependable it is. Obviously 1-2 seconds is too long at those distances and speeds (60mph = 88ft/s).
This sort of throws up a more general question and that is what is the necessary range for secondary comms in this scenario? Is it enough to have LOS (line of sight) or does it need to go further, if it's not the primary comms? I suppose I'd have to map it out a bit better first.
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