Secondly, study the exiting routing and MAC protocols for wireless sensor network.
第二，对无线传感器网络现有的路由协议与介质访问控制(MAC)协议进行研究。
Traditionally, MAC protocols are used to control channel accessing and manage retransmissions after collision.
传统上，解决冲突的方法是采用MAC协议控制数据包接入信道和冲突后的重传管理。
In practice, the nodes are always moving, the design of MAC protocols in the past assumed that nodes are at the static.
在一些实际应用环境当中，节点总是处在移动中，但现有的MAC协议大都是基于节点处在静止状态这一前提下设计的。
Compared with traditional wireless networks, the MAC protocols of wireless sensor networks will firstly consider energy consumption.
与传统网络的MAC协议不相同的是，无线传感器网络的MAC协议首要考虑的因素就是节省能量。
The paper analyzes several MAC protocols and the feature of data flows in WSN and proposes a bandwidth assignment policy based on node' s flow.
本文分析了WSN中几种MAC协议和数据流的特点，提出了一种基于节点流量的带宽分配策略。
Recently many cluster-based MAC protocols are proposed, in order to reduce collision taking TDMA scheme to manage the intra-cluster communication.
近来已经提出了很多基于簇的MAC协议，为减少冲突在簇内部采用TD MA方式来协调簇内各个节点的传输。
Recent studies have proposed many cluster-based MAC protocols in order to reduce collision take TDMA scheme to manage the intra-cluster communication.
近来已经提出了很多基于簇的MAC协议，为减少冲突在簇内部采用TD MA方式来协调簇内各个节点的传输。
Our analytical and simulated result shows that comparing with existing MAC protocols, AMAC obtains 30% energy savings and gets double throughput under heavy load.
经过理论分析及仿真试验结果显示，与已有的MAC协议相比，AMAC在轻载时能够节省30%的能量，在重载时能够提供两倍的网络吞吐量。
First of all, we introduce the typical MAC protocols in WSN and their energy-saving mechanisms. Then a detailed introduction to S-MAC is given, which is mainly designed for WSN.
论文首先对典型的MAC层协议和节能机制进行了介绍，并详细分析了S- MAC的能量消耗和节能机制，指出了该协议中存在的问题。
NS was used to establish UWB network model and implement a MAC protocol combining the coding technology of the physical layer. It was compared with several traditional MAC protocols.
文中运用NS网络仿真软件搭建了完整的UWB网络环境，实现了一种融合物理层编码技术的MAC协议，并与几种传统的MAC协议进行了仿真分析比较。
The media access control (MAC) protocol of mobile Ad Hoc networks (MANETs) is closely-related with its physics layer, most MAC protocols request the capability of carrier sense in physical layer.
无线自组网的介质访问控制(MAC)协议是与物理层密切相关的，大多数MAC协议都要求物理层具备载波感知能力。
After introducing some different MAC protocols in this thesis, and analyzing energy factors of MAC layer, such as overhearing, idle listening, collision conflict and excessive information of control.
本文在对不同类型MAC协议进行了介绍，并分析了MAC层的能耗原因，如网络串音、空闲侦听、碰撞冲突及控制信息过多。
It also identifies which hosts are accessible, their IP and MAC addresses, and scans and checks the open ports, protocols used, and the host operating system.
它还可以识别哪些主机是可以访问的、它们的IP和mac地址，并扫描和检查已打开的端口、所使用的协议和主机操作系统。
Medium access control (MAC) protocol is an important component of the wireless data communication protocols.
信道接入协议(MAC)是无线数据通信协议的重要组成部分。
As sensor nodes are energy limited, saving energy is the primary issue in designing Medium Access Control (MAC) protocols in sensor networks.
传感器节点能量受限，节能是传感器网络中媒体访问控制(MAC)协议设计的首要问题。
This paper introduces a method for modeling broadcast protocols in OPNET by illustrating a simulation for a new real-time Ethernet MAC protocol.
本文以一种新型的实时以太网介质访问控制协议的仿真为例，介绍总线型协议建模方法，详细描述了OPNET的建模仿真过程。
In wireless sensor networks, MAC layer Protocols are capable of determining the wireless channel utilization and allocate the limited wireless communication resources between the nodes.
在无线传感器网络中，介质访问控制MAC协议决定无线信道的使用方式，在节点之间分配有限的无线通信资源。
In wireless sensor networks, MAC layer Protocols are capable of determining the wireless channel utilization and allocate the limited wireless communication resources between the nodes.
在无线传感器网络中，介质访问控制MAC协议决定无线信道的使用方式，在节点之间分配有限的无线通信资源。
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