Why can there be a very high ping to the router?

Question

Computer networks

There is a zyxel giga 2 router (new), before that there was a zyxel giga (they changed it, they thought that the problem was in it).
By cable ping 1ms, by wi-fi it jumps from 3ms to 3000ms + - (the signal is good).

Answer 1

How many customers are at the outlet? What type of authorization? What channel, B\G\N protocol, frequency? Are there many other places around? What hardware is on the measuring client? Is it the same for others? What is the point mode (router, bridge)? Is WDS enabled? What port is the lan cable connected to? Is WAN in use?
If you try to specify
1 Problems with the air - reboot - both the frequency range as a whole (neighbors) and a specific point - for giga more than 6-7 clients, noise / reflections / interference (the signal will be high), WDS increases susceptibility to interference , using B\G\N compatibility mode and or minor B\G network modes may introduce additional delays
2 Problems with the client - drivers may contain errors, in particular, with encryption modes (you need to check for updates), network flood (torrents, bonjour, dropbox, IPTV and other multicast, viruses) - can lead to wireless interface overload
3 Connection \ topology problems - passing the local network through nat (connecting via wan in route mode) leads to router overload, a large load on the cpu of the router (about 100 Mbps) for outgoing traffic, heavy traffic between wireless clients (50 megabits is enough)
This is offhand
PS - what are you pinging ? your router or lan client?

Answer 2

Disable b / g support, leave only n, set the band to 20 MHz, select the least crowded channel (You can check with something like WiFi Analizer), disable multicast functions, QoS, other unused functionality, if the router allows, then disable the connection of slow clients in general, WiFi works for everyone with the delays of the slowest client.

Answer 3

There was the same problem on DLink and TP Link routers, oddly enough, the latest firmware was cured in both cases.

Answer 4

Signal reflection, RF, Crosstalk, and static interference also increase PING, since if the spurious signal is equal to or stronger than the useful signal, then it is more difficult for the receiver to recognize it, the delay increases or the packet is lost altogether
. PING is also affected by noise in the network.