This brief presents the novel PHY layer technique, attachment
transmission, which provides an extra control panel with minimum
overhead. In addition to describing the basic mechanisms of this
technique, this brief also illustrates the challenges, the theoretical
model, implementation and numerous applications of attachment
transmission. Extensive experiments demonstrate that attachment
transmission is capable of exploiting and utilizing channel redundancy
to deliver control information and thus it can provide significant
support to numerous higher layer applications. The authors also address
the critical problem of providing cost-effective coordination mechanisms
for wireless design. The combination of new techniques and
implementation advice makes this brief a valuable resource for
researchers and professionals interested in wireless penetration and
communication networks.