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Question of the Day: What's the most interesting small town you've visited in South Africa?
I know
- Thread starter Farquaon
- Start date
Moederloos
Honorary Master
hey! my idea and you stole it (the 1st post)!
TheBossMan
Expert Member
1st Post in WiMax
Hi all.. Welcome to our very own WiMax subforum..
Hope U enjoy it here..
What is WiMax you may ask..
WiMAX
From Wikipedia, the free encyclopedia
WiMAX is defined as Worldwide Interoperability for Microwave Access by the WiMAX Forum, formed in June 2001 to promote conformance and interoperability of the IEEE 802.16 standard, officially known as WirelessMAN. WiMAX aims to provide wireless data over long distances, in a variety of different ways, from point to point links to full mobile cellular type access. In practical terms this enables a user, for example, to browse the Internet on a laptop computer without physically connecting the laptop to a wall jack. The Forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL."
link: http://en.wikipedia.org/wiki/WiMAX
Good day 2 all..
Hi all.. Welcome to our very own WiMax subforum..
Hope U enjoy it here..
What is WiMax you may ask..
WiMAX
From Wikipedia, the free encyclopedia
WiMAX is defined as Worldwide Interoperability for Microwave Access by the WiMAX Forum, formed in June 2001 to promote conformance and interoperability of the IEEE 802.16 standard, officially known as WirelessMAN. WiMAX aims to provide wireless data over long distances, in a variety of different ways, from point to point links to full mobile cellular type access. In practical terms this enables a user, for example, to browse the Internet on a laptop computer without physically connecting the laptop to a wall jack. The Forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL."
link: http://en.wikipedia.org/wiki/WiMAX
Good day 2 all..
Last edited:
TheBossMan
Expert Member
Sorry guys.. I also had that Idea...
The_Unbeliever
Honorary Master
Bah... first post should go to me...
Anyway...
Good to see we've got a whimax forum...
where we can whine to the max...
Regards
Libs
Anyway...
Good to see we've got a whimax forum...
where we can whine to the max... Regards
Libs
chiskop
Executive Member
For me it'll be the Why? max forum.
TheBossMan
Expert Member
I just wanted to be the first and i guess its worth getting flamed.
See they moved my thread into yours.. congrats.. I was looking for the wikipedia stuff and you just beat me by a minute or so..
See they moved my thread into yours.. congrats.. I was looking for the wikipedia stuff and you just beat me by a minute or so..
Dont worry, you are the 1st one to contribute something iro the subforum. So technically your the first guy to be on topic!
I still find it amusing that the WiMax equipment being used by Telkom (Alvarion BreezeMAX) Isn't actually based on the official 802.16 Standard (because its not complete yet).
Its based on 802.16-2004.
More info here: http://www.alvarion.com/solutions/access/products/BreezeMAX/
I work with this equipment in Ireland. Its great, but it has its limitations.
Hopefully the technology will mature with time.
Its based on 802.16-2004.
More info here: http://www.alvarion.com/solutions/access/products/BreezeMAX/
I work with this equipment in Ireland. Its great, but it has its limitations.
Hopefully the technology will mature with time.
Roman4604
Executive Member
The (fixed) 802.16d-2004 WiMAX standard was ratified in 2004, thats why its part of the name. The newer (mobile) standard 802.16e-2005 was ratified in 2005 (just) as its name implies.
There are some practical differences between the two, but most believe over time 802.16e will replace 802.16d for both fixed and (obviously) mobile application.
Gerry
Senior Member
Curious to your exepriences so far, does the band offer promises ? What does topology look like ?
Roman4604
Executive Member
64-QAM rocks like no other.
Just got a load of docs from a mobile wimax equipment vendor.
The 802.16-2004 standard is basically:
802.16a + 802.16b + 802.16c + HIPERMAN
And 802.16e-2005 is:
802.16-2004 + A few amendments
And after all of that, here's the basics
802.16-2004:
< 11GHz Spectrum
Non Line of Sight
Up to 75Mbps in 20MHz bandwidth channels
OFDM and OFDMA with TDD and FDD
Fixed and Portable applications
7-10km Typical cell radius, up to 50km
802.16e-2005:
< 6GHz
Non Line of Sight
Up to 15Mbps in 5MHz channels
OFDM and OFDMA with TDD and FDD
Nomadic and Full mobility applications
2-5km Typical cell radius.
A typical deployment as an access technology is a cellular design.
I have 2 networks here, a Fixed WiMax network and a Nomadic WiMax network, each from different vendors using different CPEs.
The Fixed WiMax is your average Point to Multipoint layout.
The Nomadic WiMax is nomadic, so you can turn it on anywhere within a cell and operate. It has very good indoor penetration since I have around 200 Basestations covering Dublin.
Sadly, both technologies share the same channel, and we've seen too many interference problems to be able to operate them both in the same area.
Perhaps with time, once all the kinks are ironed out in the technology, this problem will be overcome.
The 802.16-2004 standard is basically:
802.16a + 802.16b + 802.16c + HIPERMAN
And 802.16e-2005 is:
802.16-2004 + A few amendments
And after all of that, here's the basics
802.16-2004:
< 11GHz Spectrum
Non Line of Sight
Up to 75Mbps in 20MHz bandwidth channels
OFDM and OFDMA with TDD and FDD
Fixed and Portable applications
7-10km Typical cell radius, up to 50km
802.16e-2005:
< 6GHz
Non Line of Sight
Up to 15Mbps in 5MHz channels
OFDM and OFDMA with TDD and FDD
Nomadic and Full mobility applications
2-5km Typical cell radius.
A typical deployment as an access technology is a cellular design.
I have 2 networks here, a Fixed WiMax network and a Nomadic WiMax network, each from different vendors using different CPEs.
The Fixed WiMax is your average Point to Multipoint layout.
The Nomadic WiMax is nomadic, so you can turn it on anywhere within a cell and operate. It has very good indoor penetration since I have around 200 Basestations covering Dublin.
Sadly, both technologies share the same channel, and we've seen too many interference problems to be able to operate them both in the same area.
Perhaps with time, once all the kinks are ironed out in the technology, this problem will be overcome.
Roman4604
Executive Member
Nope, d & e are fundimentally different and totally incompatible. Just because they come from the same standards commitee does not make them anything alike (think 802.11a vs. 802.11g)
Not quite. In practice d is 3.5GHz only, while e uses 2.5GHz or 3.5GHz. Both are licensed bands therefore a provider can only operate (irrespective of d or e) within the frequency allocated to them by their respective regulator (e.g a 20MHz allocation in the range 2585-2605MHz).
WiMAX is not a free for all like the WiFi. If interference is encountered its generally from ppl using WiFi type equip thats been hacked to operate outside of the ISM bands (> 2.4GHz).
Roman, you are confusing IEEE spec with WiMAX forum accreditation. The IEEE spec IS in fact very flexible terms of frequencies. It is the WiMAX forum, which in the spirit of accrediation, specifies certain profiles, and this limits the frequencies. Whereas d is concerned, it stretches (in accredited fashion, WITH commercial deployments, escpecially in Africa) from 3.3GHz up to 3.8GHz, with unlicensed deployments in the upper 5.8GHz bands.
For 802.16e, Profile 1A, 1B and 2B prescribes 2.3-2.4GHz, 3A prescribes 2.5-2.69GHz, 4B, 5AL, 5BL describes 3.4-3.6GHz ETG 1 and 2 describes 3.4-3.8GHz.
Most silicone produced these days for CPE's feature Intel Rosedale 2 which is dual silicone, which should (touch wood) allow for software upgrade to e, although wave 2 certification items like MIMO will require a new CPE alltogether. BTS's will never be software upgradeable to e.
MANY more frequencies
Roman, you are confusing IEEE spec with WiMAX forum accreditation. The IEEE spec IS in fact very flexible terms of frequencies. It is the WiMAX forum, which in the spirit of accrediation, specifies certain profiles, and this limits the frequencies. Whereas d is concerned, it stretches (in accredited fashion, WITH commercial deployments, escpecially in Africa) from 3.3GHz up to 3.8GHz, with unlicensed deployments in the upper 5.8GHz bands.
For 802.16e, Profile 1A, 1B and 2B prescribes 2.3-2.4GHz, 3A prescribes 2.5-2.69GHz, 4B, 5AL, 5BL describes 3.4-3.6GHz ETG 1 and 2 describes 3.4-3.8GHz.
Most silicone produced these days for CPE's feature Intel Rosedale 2 which is dual silicone, which should (touch wood) allow for software upgrade to e, although wave 2 certification items like MIMO will require a new CPE alltogether. BTS's will never be software upgradeable to e.
Roman, you are confusing IEEE spec with WiMAX forum accreditation. The IEEE spec IS in fact very flexible terms of frequencies. It is the WiMAX forum, which in the spirit of accrediation, specifies certain profiles, and this limits the frequencies. Whereas d is concerned, it stretches (in accredited fashion, WITH commercial deployments, escpecially in Africa) from 3.3GHz up to 3.8GHz, with unlicensed deployments in the upper 5.8GHz bands.
For 802.16e, Profile 1A, 1B and 2B prescribes 2.3-2.4GHz, 3A prescribes 2.5-2.69GHz, 4B, 5AL, 5BL describes 3.4-3.6GHz ETG 1 and 2 describes 3.4-3.8GHz.
Most silicone produced these days for CPE's feature Intel Rosedale 2 which is dual silicone, which should (touch wood) allow for software upgrade to e, although wave 2 certification items like MIMO will require a new CPE alltogether. BTS's will never be software upgradeable to e.
You'll notice I used the word "Amendments", which could mean anything. I have a feeling that some pieces of the WiMax whitepaper are purposefully vague, and most Vendors aren't making much effort to make it any clearer
As Hannes Points out, if you want to stay WiMax Forum accredited, and WiMax forum interoperable (and any other WiMax buzzword you want to throw in), you get restricted to only a few frequencies.
In Ireland, there are 4 channels in the 3.4/3.5GHz space. All of them are gone, and we were lucky enough to get one.
Roman4604
Executive Member
I was referring to the frequency bands in a broader WiMAX context, not the precise 1000MHz associated, and left out 2.3 and unlicensed as the former it isn't seeing much pratical action, and the latter is only useful for managed point to point application.
Specs/accreditation aside, once Intel releases their hybrid WiMAX/WiFi card as part of the next Centrino, the bands it supports will become the de facto WiMAX frequencies/profiles (for 802.16e).
Not sure how much legs d has anyway. The first 'momma' of WiMAX networks will be the Sprint/Nextel nation-wide deployment in the US on 2.5GHz 802.16e, and the vendors go where the money is, specifically the big 3 honchos Intel, Samsung & Motorola.