An ISCSI design over wireless network

With the trend that wireless network and mobile devices have become more and more prevalent, there is an increasing need to build a wireless storage system that can access information efficiently and correctly. iSCSI (Internet SCSI) is an important protocol to enable remote storage access through the TCP/IP network. The performance of iSCSI over wireless network is an interesting research topic due to the impacts of the low bandwidth, unreliability and long latency of the wireless network. This paper presents a new iSCSI design with the concepts of multiple virtual TCP connections in an iSCSI session and parallel working mechanism in iSCSI layer over wireless LAN 802.11b. Test results show that for small I/O request, 2K for example, multiple connection iSCSI design can achieve 112% throughput improvement compared to normal iSCSI model. The maximum throughput can reach 0.62 MB/s for big I/O (128K), which is closed to the theoretical analysis result.