Re: [WG-BB] Study Report: CATV assignment guidline

[MAEMURA Akinori <maem@maem.org>]

Obata-san,

| >| >Do you think the bandwidth estimation as to the number of customers
| >| >supported in Japan is the same as it will be in India or China or
| >| >Australia? The answer to this question is critical I guess.
| >|
| >| A good point. I guess JPNIC simply doesn't know.
| >|
| >| However, my analysis of the JPNIC proposal might be split into two parts.
| >|
| >| 1) JP community finds /24 per a chassis is too small for recent rapid
| >|     development. So the new guideline is not effective at all, at least
| >|     in Japan.
| >| 2) One solution which may be reasonable is /23 for 30Mbps cable and
| >|     /24 for 10Mbps one. An assumption here is that operators who expect
| >|     small demands of customers deploy 10Mbps cable.
| 
|    Doesn't this mean that although JPNIC does not know the relationship 
| between bandwidth estimation and the number of potential users, it 
| estimates that 30Mbps will hold nearly 500 users and 10Mbps will hold about 
| 250 users.  I think this means that JPNIC knows that 30Mbps will hold at 
| least 500 users in 3 months term considering the address allocation process.
| 
Not JPNIC resource analysts' view but conclusion after 
several meetings among Cable Operators and IPwg members.


|    May I ask a question?  Since I am not familiar with cable technology, I 
| thought that cable modems are placed in every head end.  I think I saw 
| somewhere that average home passes per head end is 500.  Please correct me 
| if I am wrong.
| 
They say it is 1,500 to 2,000.  I also want the input from
Operators themselves, please.


Akinori
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