802.11ax or WIFI6 final specifications from WIFI alliance is yet to be announced. 802.11ax access points and client devices are already in the market.
802.11ax bringing us efficiency with the help of techniques such as OFDMA by better use of spectrum, improving spatial reuse also known as BSS colouring etc. We can read a lot of good articles and blogs from different sources on other WiFi 6 topics such as OFDMA, but I want to talk about BSS colouring in this post and try to make it easier to understand.
WIFI is Half Duplex:
We all know that 802.11 communication is half duplex which means at one given time a station can only transmit or receive. You cannot transmit and receive at the same time that’s why it called as half duplex.
CSMA/CA (Carrier sense with multiple access collision avoidance):
Because the way 802.11 communication works every station must wait for other station to complete communication before it can transmit. This is achieved by CSMA/CA mechanism.
CSMA/CA introduces its own challenges such as:
Contention overhead
Airtime utilization which consumes a lot of bandwidth
Instead of going in more details that how CSMA/CA works lets focus on 802.11ax BSS colouring. BSS colouring is not replacing CSMA/CA but making better use of it.
OBSS (Overlap Basic service set):
Overlapping BSS is what we can see in the image below. It’s the service set which can be seen by other access points nearby or client devices connected to access point.
If both BSS working on the same channel it means CSMA/CA mechanism will affect both overlapping BSS. Clients and access points will have to contend for the medium and wait for it to be free. This is where BSS colouring will help achieve better performance.
Intra-BSS frame VS Inter-BSS frame:
BSS colouring is not a new concept infect it has been used in 802.11ah already. 802.11ax specification bringing mix of good technologies together.
BSS colouring enables devices to identify their own BSS against OBSS (Overlap BSS) with the help of frame MAC header. BSS colour is not a colour such as blue or white colour but it’s a 6 bits field which can have value range from 1 to 63.
(BSS colour information field)
Intra-BSS frame:
CSMA/CA mechanism let the devices listen to 802.11 communication and talk when everyone is quiet. BSS colouring allow the stations to understand whether transmitting station is from its own BSS or OBSS (overlap BSS). If frame colour or colour bit is same, then it will be considered as intra-BSS frame and station will have to contend for the medium as normal process.
Inter-BSS frame:
If BSS colour of the frame is different from listening station’s BSS colour, then this frame will be considered as inter-BSS frame. Now here is the difference between 802.11ax and legacy amendments where stations had to contend for the medium whether frame was from same BSS or OBSS.
If station learns that this frame is from OBSS then it will ignore it and will not contend for the medium and will continue transmitting.
This mechanism allows 2 stations to communicate at the same on same channel in a different BSS.
(Inter-BSS frame vs Intra-BSS frame)
BSS colouring decision making:
Station detect RF energy.
Clear channel assessment suggests whether energy threshold is above -82 or below.
If RSSI greater than -82 and station checks whether it can demodulate traffic?
If yes, then it will read frame header to see colour of the frame.
If its same colour, then its means frame is from intra-BSS and will have to go through normal CSMA/CA process.
If colour is not same as its own BSS, then it’s an inter-BSS frame.
At this point there is another threshold check, it checks if signal strength of frame is above -62 or below.
If signal strength is greater then -62 its mean its too close and medium will be consider as busy.
If signal strength is lower than -62 then station will not contend for this transmission and will continue transmitting.
(BSS colouring decision process)
BSS colouring or Spatial Reuse Benefits:
Increase capacity
Adaptive CCA can adjust signal level threshold
Decrease channel contention problem
Signals with same BSS colour use a low RSSI threshold for deferral, therefor reducing collision in same BSS.
Signals with OBSS use a higher RSSI threshold for deferral, therefor allowing more simultaneous connection
It provides some degree of ubiquities fairness
Consideration:
Its is important to understand that to make best use of this capability, we will have wait and see that how service providers or vendors are going to implement this. In order set OBSS/PDmin and OBSS/PDmax thresholds a WLAN infrastructure will need to have accurate view of the network in which clients are operating. If all variables work together it can help achieve QOE (quality of user experience) and capacity at same time.
The post BSS Colouring or Spatial reuse (802.11ax AKA WiFi6) appeared first on WiFi.
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This article is incredibly helpful for understanding 802.11axs BSS coloring, explaining how it improves WiFi performance without replacing CSMA/CA. The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks.
This article is really helpful in explaining BSS coloring in 802.11ax. It clarifies how it improves WiFi performance by reducing contention between overlapping BSS, which is great for understanding WiFi 6s spatial reuse.SunPerp Dex
The article is very informative about BSS coloring in 802.11ax, explaining how it improves WiFi performance. I appreciate the clear breakdown of how it reduces contention and increases capacity. The explanation of intra vs. inter-BSS frames and the decision-making process is particularly helpful for understanding the technical improvements.speed stars bản Việt hóa
This article provides a clear and insightful explanation of BSS coloring in 802.11ax/WiFi 6, making it easier to grasp how it enhances network performance. The breakdown of frame detection and threshold checks is particularly helpful for understanding its practical implications.footballbros
This article is incredibly helpful! It clearly explains how BSS coloring in 802.11ax improves WiFi performance by reducing contention, which is great for understanding spatial reuse in WiFi 6 networks. The breakdown of frame detection and thresholds is insightful.ThePremierLeague
This article is incredibly helpful for understanding 802.11axs BSS coloring, explaining how it improves WiFi performance without replacing CSMA/CA. The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks.ai remove watermarks
This article is incredibly helpful for understanding 802.11axs BSS coloring! The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks.SunPerp Dex
This article is incredibly helpful for understanding 802.11axs BSS coloring! The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks.basketball stars io
This article is incredibly helpful for understanding 802.11axs BSS coloring! The clear breakdown of frame detection and threshold checks is insightful and made the technical improvements much easier to grasp.speed stars walkthrough
This article is incredibly helpful for understanding BSS coloring in 802.11ax/WiFi 6. The clear breakdown of frame detection and threshold checks is insightful and made the technical concepts much easier to grasp.MIM
This article is incredibly helpful for understanding 802.11axs BSS coloring, explaining how it improves WiFi performance without replacing CSMA/CA. The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks.墨西哥区苹果AppleID独享
This BSS coloring explanation is way clearer than my attempts to parallel park! Finally, I get why my phone sometimes acts like its on another planet (OBSS). Who knew 6 bits could make such a difference? Though Ill believe the capacity boost when I see my neighbors WiFi stop stealing my bandwidth. And yes, we all know vendors will wait and see how to exploit this, just like they did with every other WiFi upgrade. But hey, any tech that makes my crowded apartment feel less like a dog fight is worth a chuckle. Thanks for shedding light on this, though Im still unsure if my dog understands it better than I do!
This article is incredibly helpful for understanding BSS coloring in WiFi 6! The clear breakdown of frame detection and threshold checks is insightful and made the technical improvements easy to grasp. Great job!
This article on BSS coloring is incredibly helpful, though honestly, explaining frame colors is about as exciting as watching paint dry… unless, of course, youre a WiFi 6 network, then its like finding a traffic light that actually helps! The breakdown of threshold checks is super insightful – who knew deciding whether to listen or ignore RF energy could be so complex? But really, its just CSMA/CA wearing a fancy hat and doing a bit of color theory. Still, its great to see WiFi finally learning to tell its neighbors apart without constantly causing collisions. Now, if only this technology could help me distinguish between my coffee and my existential dread…
This article on BSS coloring is clearer than my attempt to parallel park! Finally, I understand why my WiFi isnt always chaos. The breakdown of intra vs. inter-BSS frames and those clever thresholds (like -82 and -62) is like network traffic lights! It’s funny how we thought WiFi 6 was just faster, but it’s also smarter at avoiding collisions, kind of like a polite dinner party where everyone knows who’s bringing the dessert. Great explanation, though I still wonder if my dog understands this WiFi magic better than I do!the vow movie
This BSS coloring explanation is a game-changer! Now I finally get why my WiFi acts like a soap opera— ständig争抢频道. The way it explains how stations play nice or ignore each other based on colors is hilarious. Who knew 802.11ax could be so dramatic? Love the humor and clarity, though Ill believe the capacity boost when my neighbors dog stops hogging the bandwidth. 🐶💻
This article is hilariously helpful for understanding WiFi 6s BSS coloring, like a traffic light for your wireless network! It makes the complex dance of frames and thresholds way more clear than trying to explain parallel parking to my cat. Love the breakdown of how it cuts down on the digital dog fight in crowded areas. Now Im waiting with bated breath (and hopeful eyes) for my neighbors to finally stop stealing my bandwidth, though I suspect vendors will milk this one for all its worth, just like they did with every other upgrade. Still, any tech that makes my apartment feel less like a dog fight is a winner in my book! Thanks for shedding light on this, though Im still unsure if my dog understands it better than I do!
This article is incredibly helpful for understanding 802.11axs BSS coloring, explaining how it improves WiFi performance without replacing CSMA/CA. The clear breakdown of frame detection and threshold checks is insightful for anyone working with WiFi 6 networks. Who knew 6 bits of color could prevent a digital dog fight? Still, Ill believe the capacity boost when my neighbor finally stops stealing my bandwidth. And yes, vendors will definitely wait and see how to exploit this, just like they did with every other WiFi upgrade. But hey, any tech that makes my crowded apartment feel less like a dog fight is worth a chuckle. Thanks for shedding light on this, though Im still unsure if my dog understands it better than I do!laser marking machine
This article is hilariously helpful, like a traffic light finally explaining why I almost crashed my car into the neighbors WiFi! Who knew 6 bits of color could stop the digital dog fight? Now I understand why my phone sometimes acts like its on another planet (OBSS) – brilliant! But yeah, we all know vendors will wait to exploit this, just like they did with every WiFi upgrade (cough, cough, speed stars). Still, its great to see WiFi finally learning to tell its neighbors apart without constantly causing collisions. Now, if only this tech could help me distinguish between my coffee and my existential dread… Thanks for shedding light on this, though I suspect my dog understands the color theory better than I do!deltarune full prophecy
This BSS coloring explanation is hilariously helpful, like a traffic light for your wireless network! It makes the complex dance of WiFi 6 networks easier to grasp than my attempts at parallel parking. Who knew 802.11ax could be so dramatic, with its color-coded frame detection and clever threshold checks (-82 and -62 sound like signal levels from a spy movie!). Love the humor and clarity, though I’ll believe the capacity boost when my neighbor’s dog finally stops hogging the bandwidth. It’s great to see WiFi finally learning to tell its neighbors apart without constant collisions – now, if only this tech could help me distinguish between my coffee and my existential dread!đếm ngược ngày thi
This article is hilariously helpful! Explaining BSS coloring is like trying to teach my cat traffic rules – *total chaos*. But seriously, the breakdown of those -82 and -62 thresholds is like giving WiFi 6 a polite excuse me, sir to avoid collisions. Its funny how we just thought WiFi 6 was faster, but now its basically playing nice in the neighborhood! Love the humor and clarity—though Ill believe the capacity boost when my neighbor finally stops hogging the bandwidth. Thanks for shedding light on this; now Ill blame my slow WiFi on my dogs lack of understanding, not just my terrible internet. 😉act-two
This article is hilariously helpful! Explaining BSS coloring is like trying to teach my cat quantum physics – but it actually makes sense now! Love how it calls WiFi 6 a traffic light for your wireless network. The breakdown of frame colors and thresholds is clearer than my attempts to parallel park (ask my car!). Its funny how they think 6 bits of color can stop the digital dog fight in my crowded apartment, though I suspect my neighbors dog will just hog the bandwidth anyway. And yes, vendors will definitely milk this, just like every other upgrade – typical! Still, any tech that makes my WiFi less chaotic is a winner. Thanks for shedding light on this; now I wonder if my dog understands it better than I do! 🐶💻PDF compress lossless
This article is hilariously helpful! Explaining BSS coloring is like teaching my cat quantum physics – suddenly the digital dog fight makes sense (ish)! Who knew 6 bits of color could prevent collisions? Love the frame detection breakdown – it’s like network traffic lights! However, I’ll believe the capacity boost when my neighbor’s WiFi stops stealing my bandwidth, just like they did with every other upgrade. Thanks for shedding light on this, though I’m still unsure if my dog understands it better than I do! 🐶💻speed stars không bị chặn
This article is hilariously helpful! Explaining BSS coloring is like teaching my cat quantum physics – suddenly, WiFi makes sense, but also way too complicated! Who knew 6 bits of color could prevent my neighbors dog from stealing my bandwidth? The threshold checks are like network traffic lights, except the drivers are still confused. Love the digital dog fight analogy – spot on! Cant wait to see vendors finally exploit this, though my coffee probably has better chance of winning. Thanks for shedding light on this, though Im 90% my dog understands the color theory better than I do! 🐶💻basketball stars unblocked
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This article is hilariiously helpful! Explaining BSS coloring is like teaching my cat traffic rules – total chaos! But the breakdown of those -82 and -62 thresholds is a game-changer, like giving WiFi 6 a polite excuse me, sir to avoid collisions. Who knew 6 bits of color could stop the digital dog fight in my crowded apartment? Still, Ill believe the capacity boost when my neighbor finally stops stealing my bandwidth – typical! Love the humor and clarity, though I suspect my dog understands the color theory better than I do. 😉🐶💻quay random