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NowSMS Support Forums ⬆ NowSMS Support - MMS & Advanced Issues ⬆ Archive through February 20, 2004 ⬆ |
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| Author | Message | |||
| ChrisN Unregistered guest |
Hi All, My company wants to be able to accept pictures submitted by cameraphone in MMS messages. If I used NowSMS with a GPRS modem to download MMS contents from the operator MMSC, what would be the maximum number of picture messages I could receive in a set period of time? Say each picture message is 100KBytes and GPRS bandwidth is 30Kbps (3.75KBytes/sec). That would mean that each 100KB MMS picture message takes 26.7 seconds to receive. Does this mean I'm limited to around 2 MMS receives per minute? (120 per hour). This seems kind of slow and unscalable to me. Would the MMS messages be held at the MMSC during bursty periods until my app could fetch them all? Have I got the wrong idea about how this is done? (I'm an MMS newbie). What is the best setup for receiving high volumes of large MMS messages (no sending capability required)? Thanks for any advice, Chris | |||
| Bryce Norwood - NowSMS Support Board Administrator Username: Bryce Post Number: 1765 Registered: 10-2002 |
Chris, I'd say 100KB for each picture message is estimating on the large size ... at least for current generation devices. Using high resolution (640 x 480 pics) on typical devices today gives you about 30KB. But otherwise, considering the speeds of today's networks, I would say your concern is legitimate. Another issue that needs to be considered is "mode switching". With many GPRS modems, the gateway must mode switch between SMS and GPRS, where the MMS notification is received over SMS, and the MMS content is retrieved over GPRS. This mode switching can slow things down as well. So far, the Sierra Wireless Aircard 750 (which is a PC card) is the only device that we've seen which can handle SMS and GPRS simultaneously without this mode switching, which gives it higher throughput than a typical external GSM/GPRS modem. MMS messages will be held at the MMSC during bursty periods. I would not anticipate that being a problem. From what I have seen, most operators have policies to maintain the messages for at least 3 days (72 hours). -bn | |||
