[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

stds-802-16: sub10. Bands of Interest (II)

     Unless specific limits are defined, unlicensed bands for public 
     applications might present problems, in my view, to the operators, in 
     the sense that they will not be able to control neither the quality of 
     service to the end-users (think in terms of committed or granted 
     information rates for example) nor the grade of service (or blocking 
     probability thresholds), because as they do not enjoy exclusive usage 
     of the frequency band, there is no way to avoid somebody else 
     (normally an outside, asyncronised system) launching radiofrequency 
     energy on the same band at the same place, thus creating an 
     undesirable level of interference, and all this, regardless of the 
     network dimensioning or level of infrastructure equipment the operator 
     has put in place. These two parameters (QoS, GoS) are essential when a 
     given operator (typically a CLEC) has to compete with an ILEC or other 
     CLECs targeting at the same market with competing technologies.
     (Even with specific limits defined, there is a penalty introduced when 
     designing the network thinking in the worst case scenario)
     On the other hand, I fully agree with your comments to look for 
     maximum commonality of equipment.
     It is not my intention to "discriminate" specific bands, but please do 
     not forget cost targets!
     Best regards