Packet transferring device

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 1/18 (2006.01) H04L 29/14 (2006.01) H04L 29/08 (2006.01)

Patent

CA 2193180

When a data transferring operation ends in failure because a call was released in the midst of data transfer or the like, the data should be transferred again. In this data re-transfer, it is desirable to reduce the time spent for data transfer regardless of the functions provided by a terminal side. For this purpose, an order number is assigned to a packet containing data before it is sent. This number is stored in a storage section. Further, when a packet is confirmed as to its receipt by a transmission receiver, the order number of the packet is also stored. For a resending operation of the same data, a transmitted packet and an untransmitted packet can be discriminated from each other through comparison between order numbers of a sent packet and a transmitted packet. Based on the discrimination result, only untransmitted packets are subjected to a resending operation.

Quand une opération de transfert de données est avortée par un appel effectué au cours du transfert ou par une intervention similaire, les données doivent être transférées à nouveau. Dans ce nouveau transfert, il est souhaitable de réduire le temps de transfert quelles que soient les fonctions offertes par un terminal. € cette fin, un numéro d'ordre est affecté à chaque paquet de données avant la transmission. Ce numéro est stocké dans une mémoire. De plus, quand la transmission d'un paquet est confirmée par le récepteur, le numéro d'ordre est stocké à nouveau. Dans une opération de retransmission des mêmes données, les paquets transmis et les paquets non transmis peuvent être distingués les uns des autres au moyen des numéros d'ordre des paquets transmis et des paquets reçus. Seuls les paquets non transmis identifiés par cette comparaison font l'objet d'une retransmission.

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