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论文作者:www.51lunwen.org论文属性:学期论文 termpaper登出时间:2014-05-31编辑:lzm点击率:19180
论文字数:10545论文编号:org201405302339058373语种:英语 English地区:中国价格:免费论文
关键词:Implementation WorkMobile Communication Networks移动通信移动无线网络communication protocols
摘要:Any node can receive a lot of information about the network by placing its interface into promiscuous mode. The information the node can receive can be used to build trust levels for different modes.
2.2.2 Proactive protocols – OLSR
In the proactive routing approach used in MANET maintains a constantly update topology understanding (routes calculated in advance and constantly updated).
In theory it is necessary that the whole network must be known to all of the nodes. So the constant overhead of routing traffic occurs, but there will be no initial delay in communication. Where latency delay is not desirable one should use proactive protocols because they are suitable for that kind of situations.
The (OLSR) was described in RFC3626. It is a protocol that uses the link-state scheme in an optimized manner tp circulate the topology information and it is also a table-driven pro-active protocol. Link-state information is flooded throughout the network, in a classic link-state algorithm. OLSR is also a Table-Driven Protocol. The message flooding in OLSR is optimized to preserve bandwidth because the protocol runs in wireless multi-hop scenarios. Multi Point Relaying is the technique on which the optimization is based on a technique.
As I mentioned above that the OLSR is the table-driven protocol. So, it maintains and update the information in a variety of tables.
The data on these tables is based on received control traffic, and control traffic is generated based on information retrieved from these tables. The calculation of the routes is also driven by the tables.
OLSR defines three types of control messages:
I. HELLO – These are the messages that are transmitted to all the neighbors.
II. TC – These are the link state signaling which is done by OLSR. By using MPRs TC messaging is optimized in many ways.
III. MID – Nodes transmit these messages running on more than one interface. All the IP addresses are listed by these mess本论文由英语论文网提供整理,提供论文代写,英语论文代写,代写论文,代写英语论文,代写留学生论文,代写英文论文,留学生论文代写相关核心关键词搜索。