Network mobility arises when a mobile router connecting an entire network to the Internet dynamically changes its point of attachment to the Internet. Such kind of network is referred to as a network that is mobile (NEMO). NEMO networks may lead to frequent handoffs between various access routers that are connected to the fixed network. Quality of service degradation or forced service termination may occur when there are insufficient resources required for handoff requests. This paper presents a new resource reservation protocol called NEMOR aiming at supporting QoS guarantee in a NEMO context. We focus on a reservation protocol adapted to NEMO specifications. For doing so, we use a generic signaling protocol called NSiS that may exploit advantages of both protocols; IntServ and DiffServ to provide a suitable QoS to NEMO.