In sensor networking applications TDMA-based protocols are widely used to provide energy efficient and real-time solutions for both medium access and message routing. TDMA networks are best suited for static application, though mobile TDMA networks also exist, but with significant overhead to provide consistent scheduling even in the presence of mobile nodes. In many cases, however, such complexity is not necessary: in the proposed solution the mostly static network (e.g. sensor nodes) is extended with some mobility (e.g. supervisor nodes). The proposed solution may be enough for many practical applications and it requires very small overhead, as opposed to solutions providing full mobility.