#7553 NORM 8.1.1 (: Instability of mesh while chatting

Zarro Boogs per Child bugtracker at laptop.org
Tue Jul 22 06:01:07 EDT 2008


#7553: Instability of mesh while chatting
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   Reporter:  joe        |       Owner:  mbletsas             
       Type:  defect     |      Status:  new                  
   Priority:  normal     |   Milestone:  8.1.1 (was Update1.1)
  Component:  wireless   |     Version:  Build 708            
 Resolution:             |    Keywords:                       
Next_action:  never set  |    Verified:  0                    
  Blockedby:             |    Blocking:                       
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Comment(by morgs):

 Replying to [comment:5 joe]:
 > Took 2 XOs (Joe-E and X56) home (supposedely radio-quiet environment),
 ran Chat in the simple mesh network - experienced no laptop going in/out
 of the chat. After a while X56 dropped from the network completely,
 couldn't recognize the Joe-E laptop, required several reboots to make it
 connected again. I'm attaching log files collected from both laptops.
 >
 > Preliminary conclusion: in the radio-quiet environment,  simple mesh
 networking should be stable enough for expected deployments.
 >
 > Got a 2.4 GHz spectrum analyzer, will measure "radio-intensity" at 1CC
 and at home.

 You've tested the "2 kids under a tree" case. We have deployments of >500
 XOs per school.

 The moment more XOs join the mesh network, it ceases to be a nice simple
 "radio quiet" environment. You will get different results with 3, 5, 10,
 30 XOs. You will get different results depending on which activities are
 shared, how many at once, how active the participants are, and how large
 the data (PDF in Read for example) is.

-- 
Ticket URL: <http://dev.laptop.org/ticket/7553#comment:7>
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