Almost all modern communication protocols such as PCI-Express, SAS, SATA, Infiniband, FC etc are based on IBM 8b/10b Encoding patent. There are numerous advantages to encoding, such as few motherboard traces, high speed data transfer and achieving DC balance. One of the limitation in 8b/10b Encoding that it has 25% bandwidth overhead, which led designers of PCI Express 3.0 protocol use new encoding scheme --- 128b/130b. As far I know, latest SAS/SATA protocol still use 8b/10b, but it may change someday to new encoding scheme.
No comments:
Post a Comment