混合復(fù)用無源光網(wǎng)絡(luò)中帶有灰色預(yù)測(cè)的高效動(dòng)態(tài)資源分配策略
doi: 10.11999/JEIT151201
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(61401052)，重慶市教委科學(xué)技術(shù)研究項(xiàng)目(KJ1400418, KJ1500445)
An Efficient Dynamic Resource Allocation Strategy with Grey Prediction in Hybrid Multiplex Passive Optical Network
Funds:
The National Natural Science Foundation of China (61401052), The Science and Technology Project of Chongqing Municipal Education Commission (KJ1400418, KJ1500445), The Ph.D. Start-up Fund of Chongqing University of Posts and Telecommunications (A2015-09)
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摘要: 針對(duì)混合復(fù)用無源光網(wǎng)絡(luò)的用戶接入距離增大，使得往返時(shí)延增加，造成網(wǎng)絡(luò)中閑置時(shí)間增多，進(jìn)而引起帶寬浪費(fèi)的問題，該文提出一種帶有灰色預(yù)測(cè)的高效動(dòng)態(tài)混合資源分配策略。通過對(duì)閑置時(shí)間內(nèi)到達(dá)的數(shù)據(jù)進(jìn)行灰色預(yù)測(cè)，動(dòng)態(tài)確立光網(wǎng)絡(luò)單元的帶寬分配策略，以減小網(wǎng)絡(luò)時(shí)延；利用波長(zhǎng)結(jié)束時(shí)間的差異性，周期性地實(shí)時(shí)調(diào)整各波長(zhǎng)的數(shù)據(jù)傳輸順序，實(shí)現(xiàn)波長(zhǎng)的高效利用和負(fù)載均衡。仿真結(jié)果表明，該動(dòng)態(tài)資源分配策略有效地消除閑置時(shí)間的影響，且波長(zhǎng)得到高效地利用，提高了帶寬利用率的同時(shí)減少網(wǎng)絡(luò)時(shí)延。
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關(guān)鍵詞:
- 無源光網(wǎng)絡(luò) /
- 時(shí)分波分復(fù)用 /
- 動(dòng)態(tài)資源分配 /
- 閑置時(shí)間 /
- 灰色預(yù)測(cè) /
- 資源利用率
Abstract: With the access distance of users increasing in hybrid Time and Wavelength Division Multiplexing Passive Optical Networks (TWDM-PONs), the round trip time becomes very long, and idle time is increased in the network. It leads to the problem of bandwidth waste. In order to solve this issue, an efficient and hybrid dynamic resource allocation strategy with Grey Prediction (GP) is proposed. In order to decrease the network delay performance and avoid the waste of resource, the Grey Prediction model is utilized to predict the arrival data during the idle time and dynamically allocate bandwidth to optical network units. Utilizing the finishing time difference of data transmission on wavelengths, the higher transmission efficiency and load balance of wavelengths can be achieved by constantly adjusting the mode of wavelengths transmission periodically. The simulation results show that the proposed hybrid strategy can effectively eliminate the idle time to avoid waste of bandwidth and reduce network delay while making wavelengths efficiently used to improve resource utilization rate. -
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