外文翻译—zigbee网络中采取有限洪泛源驱动路由协议减少功耗-外文文献(编辑修改稿)

外文翻译—zigbee网络中采取有限洪泛源驱动路由协议减少功耗-外文文献(编辑修改稿)内容摘要：

power supplies such as automation and monitoring applications [1]. The Physical (PHY) and Medium Access Control (MAC) layers of ZigBee are based on IEEE [2]. It is developed by ZigBee Alliance [3]. This technology operates in unlicensed frequency range of 868MHz, 915MHz and with data rate 20250kbps and also has a coverage range of 10100m [2]. The nodes are divided into two types that include Full Function Device (FFD) and Reduced Function Device (RFD). A FFD node can act as a coordinator, router and enddevice. In fact, it can form a work and specify address to joint nodes, if it acts as a coordinator. Also, it enables to route the packets and plays the role of enddevice, namely, send its information to parent node. Another type of node, RFD, can just be enddevice in the work. From topological point of view, ZigBee has three topologies including star, tree and mesh that they are shown in figure 1. In the star topology, there are a coordinator and several other nodes which are connected to it by a hop. Tree is constituted based on parentschild relationships. There are a coordinator as a root of tree and other nodes that join as child to it. If a children node is a router, itcan accept some child under certain circumstances. The last topology is mesh. This topology has a coordinator and some routers and enddevices. The FFD nodes can municate with others, if they are in the coverage range of together. Thereby, there are maybe some paths between source and destination [3]. For finding shortest path, ZigBee uses routing algorithm based on AODV [4]. It can find the appropriate route by the use of broadcasting Route Request (RREQ). The destination node may receive RREQ packet from several , it sends Route Reply (RREP) through shortest path Fig. 1. Topologies of ZigBee Technology: (a). Star, (b). Mesh and (C). Tree. Also, this algorithm sends Hello message periodically for detecting active nodes. This feature consumes energy that is not suitable for ZigBee technology. Therefore, the use of AODVjr [5] is suggested in [3].The main difference between them is that sending Hello message and precursor list are eliminated in AODVjr and just destination node transmits connect message. It is for understanding the situation of a route. If source node receives this packet, it can send their packet from that route. This difference reduces the number of sent packets and power consumption but AODVjr is similar to AODV in broadcasting RREQ packet that it consumes a high level of energy. Thus, finding a suitable method for reduction in sending routing packets is very important that is suggested in this paper. It use information of tree routing in AODVjr. The paper is organized as follows: section 2 introduces the overview of ZigBee routing protocol, section 3 is about the suggested routing method, section 4 presents the simulations of the discussed issues and the results of them。 and the last section concludes this paper. 2 Overview of ZigBee Routing Protocols ZigBee technology has two main routing protocols. One of them is tree routing and another is AODV that AODVjr is introduced in this paper rather than it due to the above discussed reason. These approaches are explained as follow. Tree Routing Tree routing algorithm is based on addressing scheme that is named “Cskip”. It assigns an address to each joint node to the work. It operates based on three parameters including the maximum number of router children of a parent Rm, the maximum depth of work Lm and the maximum number of children of a。