My pennies worth
128 bytes is the max data size of a short_message due to TTC SS7
restrictions.... from legacy days.... assumption is they just use the same
policy for pactet
All email/HTTP-post requires the short_message notification
When mail/content is sent to a J-phone, if the total user data content is
less then 128 *3, the mail is sent as 3 short messages, If mail/data content
exceeds 128 * 3, a notification with additional headers is sent
They will not bill for the notication however, just the data that is pulled
down over packet by the handset
headers are generated at a gateway
From: Chris Wooldridge [mailto:Chris.Wooldridge_at_bullant.com.au]
Sent: Friday, March 28, 2003 8:24 AM
Subject: (keitai-l) J-Phone HTTP Headers - Do they count these when
We have been testing a networked MIDlet on a J-Phone SH52 handset.
Profiling our traffic shows that J-Phone specific HTTP headers account for
the majority of the bandwidth consumed by our application. For example, a
HTTP POST request with a content-length of 15 actually consumes 417 bytes -
mainly because of x-jphone... headers.
My understanding of J-Phone's packet charges is that a billing unit is 128
bytes, for which the subscriber is charged 0.3 yen.
We have a protocol that has been highly optimised so that most HTTP requests
sneak in at 125 bytes - 0.3 yen - whilst containing all of the required
headers for HTTP/1.1. It seems a little unfair that J-Phone add additional
headers to blow our request size out to four billing units or 1.3 yen!
Can anyone tell me:
1. Does anyone have a precise definition for what constitutes the 128 byte
billing unit? Is this the HTTP Content-Length (ie the payload only), the
entire HTTP headers plus content-length or something else?
2. Are the x-jphone- headers generated at the handset or mobile data
gateway? In other words, do they actually send those x-jphone headers over
the air and bill the unwary subscriber for them?
The following press release from J-Phone suggests that - for Super Mail
users at least - a message response is billed at a single packet rate.
"those wishing to confirm message delivery will no longer be charged packet
data costs (0.3 yen)."
I assume this response is sent via HTTP. If so, they cannot be charging for
those additional headers - right?
3. Can anyone provide me with pointers to DoCoMo / KDDI billing details /
HTTP header information etc.
Many thanks in advance for responses.
FYI, these are the HTTP headers added by J-Phone that we see but do not
User-Agent: J-PHONE/4.1/J-SH52/SNJSHD3047292 SH/0002aa Profile/MIDP-1.0
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Received on Fri Mar 28 05:30:14 2003