基于相對移動性預(yù)測的k跳AdHoc網(wǎng)絡(luò)分簇算法
doi: 10.11999/JEIT180192 cstr: 32379.14.JEIT180192
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北京郵電大學(xué)網(wǎng)絡(luò)與交換技術(shù)國家重點(diǎn)實(shí)驗(yàn)室 ??北京 ??100876
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國網(wǎng)河北省電力有限公司 ??石家莊 ??050021
Relative Mobility Prediction Based k-Hop Clustering Algorithm in AdHoc Networks
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State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
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State Grid Hebei Electric Power Company, Shijiazhuang 050021, China
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摘要: 針對網(wǎng)絡(luò)節(jié)點(diǎn)隨機(jī)移動造成的AdHoc網(wǎng)絡(luò)分簇結(jié)構(gòu)變化和路由失效問題,該文提出一種基于相對移動性預(yù)測的k跳分簇算法,分析和預(yù)測網(wǎng)絡(luò)節(jié)點(diǎn)運(yùn)動狀態(tài),自適應(yīng)地調(diào)整分簇結(jié)構(gòu),提高簇結(jié)構(gòu)穩(wěn)定性。首先,使用多普勒頻移計(jì)算節(jié)點(diǎn)間相對移動速度,預(yù)測節(jié)點(diǎn)移動性,得到節(jié)點(diǎn)間鏈路保持時(shí)間。然后,在簇形成階段,采用面向節(jié)點(diǎn)穩(wěn)定性的MAX-MIN啟發(fā)式算法,根據(jù)節(jié)點(diǎn)的平均鏈路保持時(shí)間對簇首進(jìn)行選擇。進(jìn)而,在簇保持階段,提出一種基于節(jié)點(diǎn)運(yùn)動狀態(tài)的網(wǎng)絡(luò)自適應(yīng)調(diào)整算法,一方面調(diào)整節(jié)點(diǎn)信息數(shù)據(jù)發(fā)送周期以平衡數(shù)據(jù)開銷和精確度,另一方面通過預(yù)測節(jié)點(diǎn)間鏈路通斷情況調(diào)整分簇結(jié)構(gòu),以減少鏈路失效時(shí)的鏈路重建時(shí)間,提高網(wǎng)絡(luò)運(yùn)行質(zhì)量。仿真實(shí)驗(yàn)表明,所提算法可以有效延長簇首持續(xù)時(shí)間,提高簇結(jié)構(gòu)在動態(tài)環(huán)境下的穩(wěn)定性。
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關(guān)鍵詞:
- AdHoc網(wǎng)絡(luò) /
- 分簇 /
- 移動性預(yù)測 /
- 多普勒頻移 /
- MAX-MIN算法
Abstract: To solve the problem of network structure change and route failure caused by random movement of network nodes, a relative mobility prediction based k-hop clustering algorithm is proposed, the movement of nodes are analyzed and predicted, the cluster structure is adjusted adaptively, the stability of cluster structure is improved. First, the Doppler shift is used to calculate the relative moving speed and obtain the link expiration time between nodes. Then, during the cluster formation stage, the MAX-MIN heuristic algorithm is used to select the cluster head according to the average link expiration time of the node. Furthermore, during the cluster maintenance stage, a network adaptive adjustment method is proposed based on node motion. On the one hand, the node information transmission cycle is adjusted to balance the data overhead and accuracy; On the other hand, the cluster structure is adjusted by predicting the link disconnection to reduce link reconstruction time and improve the quality of network operation. Simulation results show that the proposed algorithm can effectively prolong the duration of cluster head and improve the stability of cluster structure in dynamic environment.-
Key words:
- AdHoc network /
- Clustering /
- Mobility prediction /
- Doppler shift /
- MAX-MIN algorithm
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