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Wifi extender over coax8/12/2023 ![]() Under ideal conditions, it is possible to get 100Mbps UDP throughput on a pair of MoCA nodes (1518 byte packets). Round- trip ping times should go up by roughly 4.5ms. Times are averages, as the exact time depends on the alignment of the time of arrival to the scheduling period). The reservation timeslots and mail packets are on a fixed schedule (approximately- there are cases where the timing changes if you have a poor link) with a consequence of an unloaded MOCA network having a transit time of ~2ms going from the master node, or ~2.5ms going anywhere else (master node transmit is faster since it gets to skip the reservation step. The 4ms of latency is a product of the MOCA protocol.Īs a fully scheduled network, each packet must wait for a timeslot to send a reservation packet, wait for the schedule to be updated (map packet), and then wait for the actual scheduled time. MoCA was never meant to be all things to all people though, and while I personally use MoCA in my home I never got my own parents to use it - they just have the one computer hooked directly to their router, and WiFi for their iPad. MoCA was a very targeted solution for adding IP connectivity to things which were already wired together on a Coax network, and it did a great job at that. then decided that lack of demand meant it's not worth developing/advertising new/improved versions of the products, etc. In turn, this means most people have no idea that MoCA even exists, so they don't go looking for it. The consumer market for bare Ethernet-Coax gateways was smaller (see above) as it has to compete with both WiFi and "just run some new CAT-5" (as well as niche things like HPNA/G.hn) so it didn't get a lot of focus or advertising. The market for bare Ethernet-Coax Bridges (ECB) was always tiny in comparison. They could also pre-configure the MoCA so it wouldn't interfere with some other stuff they might want to put on the cable (Example: DirecTV put its downlink from the dish squarely in the middle of the MoCA frequency band, so you had to configure MoCA to a different channel in DirecTV houses than e.g. The cable/satellite vendors needed the deterministic performance of MoCA (vs WiFi) and they were always planning on putting a box in every room with a TV - which generally already aligns with where the cable taps are. That's where almost all MoCA networking chips made ended up. ![]() The main "customer" for MoCA chips was cable set-top-box vendors (Scientific Atlanta, etc.) for "multi-room PVR" products. If you need connectivity in the garage/attic/closet/kitchen, MoCA might require new wires anyway. Also, MoCA is limited to places you have coax, which is usually bedrooms & living rooms. For MoCA, you have to buy & install a box for every endpoint. so mostly all you have to do to get wireless networking is buy the router. WiFi is still easier to install (where you can get a good signal), and built into phones/laptops/etc. I think there were a couple of contributing factors: One of these leaky cables would have been ideal. It was an improvement though over the AT&T wifi connected "mini cell" because it carried everyone's signal, not just the AT&T ones. It suffered from the fact that the antenna was not omni-directional so you really wanted it on one side of the space so that everyone in the space would be able to hit it with their phone. The FCC later outlawed them but I always wish that I had kept it for those situations where cell service was hard to get. I have referred to that wireless over coax (it does bluetooth, zigbee etc so those work over coax too :-)).īack in Blekko's first building space the office was on the other side of the building from the nearest cell tower so we installed one of those cell "repeaters" which was essentially an antenna in the suite connected via a bidirectional amplifier to an antenna on the roof that was pointed at the cell tower. ![]() I picked up a vector signal generator which has as one of its standard waveforms 802.11 (b/g/n variants) I use its output on a bit of coax to the SDR sitting on my bench while working on the WiFi tranceiver code. ![]() ![]() I don't think I've seen one in practice (although I may have inadvertently made one with bad SMA grounding efforts :-)) ![]()
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