Patent ID: 6452693
Filing Date: 2002-09-17
Classification: G06F,H04L

Abstract:
A communication control method of exchanging data between an initiator and a target, said method comprising the steps of:performing, in the target, a read operation and write operation asynchronously, wherein, in the read operation, data is read from a designated location in a storage area of the initiator in response to a first command taken from a first queue and, in the write operation, data is written to a designated location in the storage area of the initiator in response to a second command taken from a second queue; transferring, in the target, the first command and the second command to the first queue or the second queue according to a designation, included in the commands, whether the commands should be queued to the first queue or the second queue; generating, in the initiator, the first command and the second command including designation whether the commands should be queued to the first queue or the second queue; and determining whether the first and the second queue have a free area respectively and managing transmission of the first command and the second command to the target so that the first and the second commands are transmitted respectively when the respective queues have a free area.