In this article we have presented a survey on OR protocols for wireless ad hoc and sensor networks. Existing work shows that OR can largely improve the performance of wireless networks. Among the surveyed protocols, it is seen that
integrating OR with network coding is an effective strategy for improved performance. Furthermore, localized coordination and location information can ease the implementation of an OR protocol. However, research topics in OR are far from exhausted. Next, we list some potential issues in this area.