發(fā)布時(shí)間：2018-06-12 01:21

  本文選題：無(wú)源光網(wǎng)絡(luò) + 混合時(shí)分波分無(wú)源光網(wǎng)絡(luò)�。� 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：無(wú)源光網(wǎng)絡(luò)(PON)是當(dāng)前固定寬帶領(lǐng)域主要的技術(shù)方案之一。從多址接入方案角度,可以把PON分為基于時(shí)分的TDM-PON和基于波分的WDM-PON兩大類(lèi)。由于成本因素,現(xiàn)階段光接入網(wǎng)環(huán)境中實(shí)際部署的仍以TDM-PON為主。TDM-PON演進(jìn)方向主要有兩個(gè):一個(gè)是單波長(zhǎng)更高傳輸速率,另一個(gè)就是WDM-PON。針對(duì)目前已經(jīng)大量部署的TDM-PON,業(yè)界普遍認(rèn)為在向未來(lái)WDM-PON過(guò)渡的一段時(shí)期,出于成本和系統(tǒng)平滑升級(jí)等因素的考慮,可以引入混合時(shí)分波分的TWDM-PON。TWDM-PON吸收了TDM-PON和WDM-PON的技術(shù)優(yōu)點(diǎn),擁有較高的安全性,并且有利于延長(zhǎng)現(xiàn)有系統(tǒng)的生命周期。論文針對(duì)TWDM-PON系統(tǒng)架構(gòu)及其動(dòng)態(tài)波長(zhǎng)帶寬分配算法進(jìn)行了研究,并基于典型應(yīng)用場(chǎng)景提出了架構(gòu)和算法的改進(jìn),通過(guò)理論分析和仿真實(shí)驗(yàn)對(duì)改進(jìn)方案進(jìn)行了驗(yàn)證。論文首先簡(jiǎn)述了TDM-PON和WDM-PON的技術(shù)特點(diǎn),并對(duì)現(xiàn)有PON系統(tǒng)的系統(tǒng)架構(gòu)和工作原理進(jìn)行了分析。論文針對(duì)典型的商住混合樓宇應(yīng)用場(chǎng)景,提出了一種TWDM-PON架構(gòu)改進(jìn)方案及動(dòng)態(tài)波長(zhǎng)帶寬分配算法。改進(jìn)方案支持不同類(lèi)型ONU組間資源共享,在有ONU突發(fā)業(yè)務(wù)請(qǐng)求超出帶寬限制時(shí),OLT可以動(dòng)態(tài)地切換其上行使用的波長(zhǎng)以充分地利用系統(tǒng)整體的帶寬資源并降低整體平均時(shí)延。理論分析和仿真實(shí)驗(yàn)表明,該系統(tǒng)總體時(shí)延性能有明顯提升。而在系統(tǒng)抗毀性能上,該系統(tǒng)可以在不影響原ONU組內(nèi)業(yè)務(wù)的同時(shí)支持鄰組ONU的保護(hù)切換。
[Abstract]:Passive optical network (PON) is one of the main technology schemes in fixed broadband field. From the point of view of multiple access schemes, PON can be divided into TDM-PON based on time division and WDM-PON based on wavelength division. Due to cost factors, TDM-PON is still the main direction of TDM-PON evolution in optical access network environment. There are two main evolutionary directions: one is single-wavelength higher transmission rate, the other is WDM-PON. In view of TDM-PON, which has been deployed in large numbers at present, the industry generally thinks that in a period of transition to future WDM-PON, due to the consideration of cost and smooth upgrade of the system, TWDM-PON.TWDM-PON with TWDM-PON.TWDM-PON can absorb the technical advantages of TDM-PON and WDM-PON. It has high security and is helpful to prolong the life cycle of existing system. In this paper, the architecture of TWDM-PON system and its dynamic wavelength bandwidth allocation algorithm are studied. Based on typical application scenarios, the structure and algorithm are improved. The improved scheme is verified by theoretical analysis and simulation experiments. Firstly, the technical characteristics of TDM-PON and WDM-PON are briefly introduced, and the system architecture and working principle of the existing PON system are analyzed. In this paper, an improved TWDM-PON architecture and a dynamic wavelength bandwidth allocation algorithm are proposed for typical commercial and residential buildings. The improved scheme supports resource sharing among different types of ONU groups. When ONU burst traffic requests exceed the bandwidth limit, OLT can dynamically switch the wavelength used in its uplink to make full use of the overall bandwidth resources of the system and reduce the overall average delay. Theoretical analysis and simulation results show that the overall delay performance of the system is improved significantly. On the other hand, the system can support the adjacent ONU protection switch without affecting the traffic in the original ONU group.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN929.1

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本文編號(hào)：2007596