On Tue, Nov 16, 2010 at 9:18 PM, Amit Nagal <helloin.amit@xxxxxxxxx> wrote: > Thanx for the reply . Âi have a doubt . > SInce iso tranfers provide error detection via CRC but no retry or > guarantee of delievery , > how recovery is automatic in case of usb iso transfers ? > Hi, My $.02 - in all known forms of communications, human, ethernet or usb, all communications can only be guaranteed to be EITHER 1-timely or 2-reliable. Ethernet and UDP guarantee only one try at communications, not success. USB and Isochronous guarantee very tight timely delivery, but no reliability guarantee. So USB iso transfers are not retried and if they fail the data is dropped and future, timely data may or may not be sent (but not reliably). Regards, Steve -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
