Wireless reprogramming in a wireless sensor network (WSNs) is the process of propagating new code image or relevant commands to sensor nodes. While all existing insecure/secure reprogramming protocols are based on the centralized approach, it is important to support distributed reprogramming in which multiple authorized network users can simultaneously and directly reprogram sensor nodes withou...

A novel solution to the reliable multicast problem is the “digital fountain” approach, in which data is encoded with an erasure protection code before transmission, and receivers can recover the original data after receiving enough distinct encoded data. This solution, however, is not desirable for streaming media schemes in which it is preferable for parts of a movie to be available for consum...

Fountain codes like LT or Raptor codes, also known as rateless erasure codes, allow to encode a message as some number of packets, such that any large enough subset of these packets is sufficient to fully reconstruct the message. It requires undamaged packets, while the packets which were not lost are usually damaged in real scenarios. Hence, an additional error correction layer is often requir...

for a finite field $mathbb{f}_q$, the bivariate skew polynomial ring $mathbb{f}_q[x,y;rho,theta]$ has been used to study codes cite{xh}. in this paper, we give some characterizations of the ring $r[x,y;rho,theta]$, where $r$ is a commutative ring. we investigate 2-d skew $(lambda_1,lambda_2)$-constacyclic codes in the ring $r[x,y;rho,theta]/langle x^l-lambda_1,y^s-lambda_2rangle_{mathit{l}}.$ a...

In this paper, error resilience is achieved by adaptive, application-layer rateless channel coding, which is used to protect H.264/Advanced Video Coding (AVC) codec data-partitioned videos. A packetization strategy is an effective tool to control error rates and, in the paper, source-coded data partitioning serves to allocate smaller packets to more important compressed video data. The scheme f...

A novel secure and distributed reprogramming protocol called SDRP is the prime distributed reprogramming protocol for Wireless Sensor Networks (WSNs). SDRP relies on distributed reprogramming approach that permits multiple authorized network users to directly and simultaneously update program images on different sensor nodes without including the base station. SDRP expands Deluge to be a secure...

an algebraic construction for constant dimension subspace codes is called orbit code. it arises as the orbits under the action of a subgroup of the general linear group on subspaces in an ambient space. in particular orbit codes of a singer subgroup of the general linear group has investigated recently. in this paper, we consider the normalizer of a singer subgroup of the general linear group a...