Exact Cooperative Regenerating Codes with Minimum-Repair-Bandwidth for Distributed Storage. (arXiv:1207.0879v1 [cs.IT])

from cs.IT updates on arXiv.org http://arxiv.org/abs/1207.0879

We give an explicit construction of exact cooperative regenerating codes at
the MBCR (minimum bandwidth cooperative regeneration) point. Before the paper,
the only known explicit MBCR code is given with parameters $n=d+r$ and $d=k$,
while our construction applies to all possible values of $n,k,d,r$. The code
has a brief expression in the polynomial form and the data reconstruction is
accomplished by bivariate polynomial interpolation. It is a scalar code and
operates over a finite field of size $q\geq n$. Besides, we establish several
subspace properties for linear exact MBCR codes. Based on these properties we
prove that linear exact MBCR codes cannot achieve repair-by-transfer.

Advertisements

发表评论

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / 更改 )

Twitter picture

You are commenting using your Twitter account. Log Out / 更改 )

Facebook photo

You are commenting using your Facebook account. Log Out / 更改 )

Google+ photo

You are commenting using your Google+ account. Log Out / 更改 )

Connecting to %s