I cannot answer your question about using WDS with different versions of OpenWRT. But let me first clarify your request/need.
You are trying to connect your TV, which has no wifi, but does have an ethernet cable, to your existing home network.
Please clarify: Are you doing this just so that your TV is connected to the Internet, e.g. you can use Netflix or Youtube on your TV?
Does your TV need to communicate with other devices in the house, e.g. a smartphone remote, or can it be on its own subnet, i.e. unable to connect to other devices in your house, but can still get Internet?
Based on this comment:
To make it clearer, I have a tv without wifi, but with ethernet. So I want to connect the tv via ethernet to the B1300 and then the B1300 should connect to another wifi-router (TL-WR1043N as mentioned above).
it seems that you simply need your B1300 to serve as a wireless client. If that is the case, there are several ways to configure. I prefer the luci interface, and can walk you through if need be.
However when you say
A 2nd task will be the access of a mobile phone to the B1300.
it is clearer that WDS is what you want. I am also trying to setup a WDS with my new B1300, so perhaps we can figure this out together.
As best as I can tell, the easiest way is to use the GL-inet interface, then follow the second post. While it is counter-intuitive that you would be going into a WAN setting, this is how GL-inet has done this UI (note that they already have an updated UI in Ver 3 of their firmware, not yet ready for the B1300). In your case, you would scan for the SSID of your TL-WR1043N, put in the correct password, and select a LAN IP within the subnet of the TL-WR1043N.
I just tried it, connecting to two different APs in my home, and it just works. It is interesting to go into the advanced settings (luci) and see all the configurations which are done as a result.
It seems that you can even have different SSIDs for the “master” and the “client”, although of course the channel is locked.
Let me know about my questions and how things stand on your side.