Abstract
Network re-programming in wireless sensor networks is an essential facility, especially in practice, for deploying and maintaining highly dynamic sensor nodes. This paper proposes an efficient way to update whole binary image based on layered architecture with multi-hop network protocol. The layered architecture utilizes 3 different memories including flash, RAM and EEPROM. The network dissemination protocol is based on hierarchical routing and support practical considerations such as sleep/wake-up mechanism for energy saving.