| 摘要: |
| 为提高无线多跳广播的能量效率，提出了采用喷泉码的协同多跳信息累积广播
协议：令注水速率最大的节点进行发送，其发送功率由传输速率和注水速率决定。当有接收
节点成功接收时，再由更新后注水速率最大的节点发送。各发送节点采用不同的喷泉码进行
编码，使接收节点获得复用增益，并且节点可以接收可靠传输范围以外的信息并进行累积直
至成功译码。根据节点是否掌握全局网络信息，给出了集中式信息累积启发算法和分布式信
息累积算法，并且将本协议与现有的能量累积协议进行了比较，仿真结果表明所提协
议在能量效率上有较大的提高。 |
| 关键词: 无线广播 协同通信 喷泉码 信息累积 |
| DOI： |
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| 基金项目: |
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| Cooperative Multi-hop Broadcast Protocols Using Fountain Codes for Wireless Networks |
| YU Guo-hai,WANG Cheng-gui,ZHANG Zhe |
| (Institute of Communications Engineering,PLA University of Science and Technolo
gy,Nanjing 210007,China) |
| Abstract: |
| In order to improve the energy efficiency of broadcast protocols for w
ireless networks, cooperative multihop information accumulated broadcast proto
c
ols based on fountain codes are proposed in this paper. Node which has the large
st fill rate transmits the information to other nodes that doesn′t complete rec
eption. Transmit power is determined by the transmission rate and fill rate. Fil
l rate of all nodes is recomputed if there is one more node receiving the inform
a
tion successfully and then the node has the largest fill rate is chosen to trans
m
it. 〖JP2〗The transmitters use different fountain codes, so receivers enjoy mul
tiplex
gain. Nodes beyond the nominal range of a transmitter can accumulate the informa
tion of unreliably receiving overheard signals till complete reception. Accordin
g
to the situations that the nodes have global network information or not, informa
tion accumulates centralized heuristic protocol and information accumulates dist
ributed protocol are proposed in this paper.
Simulations show that the proposed protocols work more efficiently
compared with the existing energy accumulate protocols. |
| Key words: wireless broadcast cooperative communication fountain codes information accumul
ate |
《电讯技术》编辑部 