Article:		Is Bluetooth a Viable Alternative to 802.11b?
Subject:		RE: 802.11b and Bluetooth coexist
Date:		2002-12-09 12:52:45
From:		anonymous2
Bluetooth is a frequency-hopping technology, 802.11b is direct-sequence spread spectrum (DSSS). This means that 11b transmits across a wide channel (22MHz), while Bluetooth rapidly hops through a sequence of narrow channels. So when "collisions" occur, bluetooth tranmissions will likely experience interference, but 11b should not be affected since the "noise" should be averaged out.

Showing messages 1 through 4 of 4.

• RE: 802.11b and Bluetooth coexist
  2003-05-23 10:29:43  anonymous2 [View]
  
  
  Bluetooth's dominence in the low power sector of the market means when it is running as a class 2/3 device at 4dBm or 0dBm which covers adequate distance of 10m it does not guzzle your power in your mobile device this is why it is prefered to 802.11b. Now the question that poses is well since we are going to slap it in our mobile systems should we start to look at it's viability as a WLAN..... I think no! It serves well for ftp and sync work and even cable replacement but I fear by splitting the stack into a services orientated thing it seems to have taken away the simplicity it was originally intended to bring with it. I think technical knowledge needs to improve around this standard and the realisation that if you want to research into it it's very time consuming (opensource project 18mnths with experts in different fields. My concern is OK when we operate Bluetooth /802.11b side by side they don't seem to impact to much. That is Bluetooth on 802.11b because of it's ruthless way over 802.11b's curtious approach sniff first, but reality says when Bluetooth floods the market and now we are talking scatternets the more spectral density these collisions are going to occur more frequent and boy when you take your phone and laptop into work along with every one else in the coorporation you could end up grinding the system to a halt. 802.15 TG2 have come up with avoidance techniques for these technologies to employ and I think this will be the way forward....

• RE: 802.11b and Bluetooth coexist
  2003-05-23 10:27:12  anonymous2 [View]
  
  
  Bluetooth's dominence in the low power sector of the market means when it is running as a class 2/3 device at 4dBm or 0dBm which covers adequate distance of 10m it does not guzzle your power in your mobile device this is why it is prefered to 802.11b. Now the question that poses is well since we are going to slap it in our mobile systems should we start to look at it's viability as a WLAN..... I think no! It serves well for ftp and sync work and even cable replacement but I fear by splitting the stack into a services orientated thing it seems to have taken away the simplicity it was originally intended to bring with it. I think technical knowledge needs to improve around this standard and the realisation that if you want to research into it it's very time consuming (opensource project 18mnths with experts in different fields. My concern is OK when we operate Bluetooth /802.11b side by side they don't seem to impact to much. That is Bluetooth on 802.11b because of it's ruthless way over 802.11b's curtious approach sniff first, but reality says when Bluetooth floods the market and now we are talking scatternets the more spectral density these collisions are going to occur more frequent and boy when you take your phone and laptop into work along with every one else in the coorporation you could end up grinding the system to a halt. 802.15 TG2 have come up with avoidance techniques for these technologies to employ and I think this will be the way forward....

• RE: 802.11b and Bluetooth coexist
  2002-12-14 08:36:43  cbaatar [View]
  
  
  
  Can someone tell me what Bluetooth does that 802.11b CANNOT? Reading Wei-Meng's article, I get the impression that BT is merely a "me too" type technology. An earlier post claims that BT is better for connecting computers and 802.11b is better for networking. But what's the difference? Doesn't a 802.11b based home LAN (or HAN) necessarily "connect" home computers together?
  
  I'd appreciate if someone could clarify this for me.
• RE: 802.11b and Bluetooth coexist
  2006-07-26 13:59:38  RussBarr [View]
  
  
  It a PAN (Personal Area Network) not a WLAN (Wireless Local Area Network). No roaming supported.
  
  Due to Bluetooth simplicity it can be emplemented in a single chip without any support from a coprocessor or network stack. It contains everthing needed. A phyical radio, BaseBand processor, MAC processor, Protocol stack, and stand alone application tasks. It is a SOC (System On Chip) and as such does not need any other CPU/OS/Network stack support.
  
  Try to put a WiFi radio and battery in your ear like you can with bluetooth ear fob.