New Frequencies for Germany

RouterOS Wireless Networking
1

:smiley:

Hi,

today RegTP announced that new frequencies are allowed for usage in Germany:

http://www.bundesnetzagentur.de/enid/5c8411e547a2e8df8305a49cef4baeef,0/Presse/Pressemitteilungen_d2.html#12020

5.755MHz - 5875MHz with 36dBm (EIRP). So this is a big big message for us who
are allowed to use 20db in 2,4 and 30db in 5,4 so far. The usage conditions are
the same than in 5,4 but only for commercial usage.

So please MT we want to use it in 2.9.47 with our RB500/R52Hs.
Dont forget to allow turbo mode :smiley:

Stefan

2

here is appropriate regulation

http://www.bundesnetzagentur.de/media/archive/11239.pdf

3

we need to know exact center frequecies for these new channels. Also we need to know how much should be decrease the tx-output for those frequencies since we support only TPC and not ATPC - currently it looks like we need to decrease it by 12.

4

Hi Uldis,

Iā€™ve sent the norm ETSI EN 302 502 which is referenced in the official document
of RegTP to support. It describes the technical details.

I expect that this will come to other european countries as itā€™s an european
document.

Stefan

5

Band 3 5725 - 5875 MHz (Channel 147, 151, 155, 167)

decrease it by 12 dB

By the power adjustment (Transmit power control, TPC) the average sum achievement is reduced and thus the influence on satellite receivers in the sum reduces. Fundamental requirements and Test procedures are in the European standard EN 302,502.

6

36-12db = 24 would make it senseless. The only solution is to fulfill the requirements
of EN302502. And only the equipment which does this is usable/sellable.

Stefan

7

36-12db = 24 would make it senseless. The only solution is to fulfill the requirements
of EN302502. And only the equipment which does this is usable/sellable.

Stefan

the regulation
is only for WISP (commercially uses ) not for private use

8

Yes. Iā€™m a WISP. I want to use it :astonished: .

Stefan

9

Me tooā€¦


dingsingo

10

Yes. Iā€™m too a WISPā€¦ :mrgreen:

11

since we donā€™t support ATPC the only way to add that is to decrease by 12db.
Another problem the 36 you can use for P-P and P-MP, but for MESH and AP-MP you should use 33. How to seperate it, because the software doesnā€™t know exacty for what purposes you are using this radio. Only option would be create two new countries - one for P-P/P-MP an other for MESH/AP-MP.

12

Hi,

is ATPC a big problem? Can it be scripted? If I understand it right it is simply to reduce
power as long as connections are working. In a point to point situation this will be
simple (and will help as 36db gives good backbone links). An AP with more clients
has no real chance to reduce power as he never knows when the station with the
weakest signal is turned on.

This MESH-NonMesh is typical european/german. Never try to keep things easy.
2 Countries would be ok. If you make a checkbox in Wirlesss-Interfaceconfig the users
in other countries would have to twiddle around with european specialties.

Stefan

13

Last time I checked, altering the TX power on the AP in ROS disconnects the CPEs - temporarily - which then have to re-associate. A script implementing ATPC would have that effect. That might render a ā€œlegally usableā€ system but a very annoying one that customers might not like (dropped VOIP calls, etc).

Also, I donā€™t know if thatā€™s true on a ā€œstationā€ end - might have the same effect there too.

It might be that later wireless drivers donā€™t have this problem, but I donā€™t know.
Comments from MT people on this topcic would be welcome. Hopefully, theyā€™re already working on it ā€¦

Regards

14

Yes. But in a point to point situation with stable signal this is acceptable.
This system would need some time at startup. But shouldnā€™t change power
very often after that.

Hopefully.

Stefan

15

Thatā€™s fine for a short link.
But not if itā€™s a long link, where weather effects adversely affects the link margin.
This is one of the whole reasons for ATPC, the transmitter only puts out high power in fade conditions - means power can be lower in clear conditions hence lessening interference for other links/users.

I sincerely hope the MT guys can (or have) at least solve the ā€œdisconnect on TX power changeā€ so that scripting can be implemented, or better still, implement ā€œtrueā€ ATPC.

Hint to developers: put some user-programmable parameters (min, max power, hysteresis, on:off:manual) in any ATPC system, so that users can fix site-specific problems. We did this on some of our other (non-radio) wireless products and it proves invaluable.

Regards

16

In one of the next RouterOS v3.0 we will add such two countries.

Country name: Germany 5.8 Fixed P-P	
Official Range:  5755-5875	
Bands: 5ghz,5ghz-10mhz,5ghz-5mhz	
		
	             Band	             Range
Frequency range:5ghz                5770-5860
	             5ghz-10mhz          5765-5865
	             5ghz-5mhz           5765-5865
EIRP with out ATPC max 24dBm(256mW)




Country name:	Germany 5.8 Fixed AP	
Official Range:  5755-5875	
Bands: 5ghz,5ghz-10mhz,5ghz-5mhz	
		
	             Band	             Range
Frequency range:5ghz                5770-5860
	             5ghz-10mhz          5765-5865
	             5ghz-5mhz           5765-5865
EIRP with out ATPC max 21dBm(128mW)
17

Thanks a lot.
Any plan to make ATPC?

Stefan

18

in future, we will make it. Probably when we will move close for releasing final version of 3.0

19

Hi Uldis,

weā€™re at 3.1 :wink:)).

this very valuable feature is still on the TODO-List?

Stefan

20

yes it is, but we still have lot of other featured that need to be added before this specific feature.