首页> 外文期刊>Journal of Lightwave Technology >DynaSPOT: Dynamic Services Provisioned Optical Transport Test-Bed—Achieving Multirate Multiservice Dynamic Provisioning Using Strongly Connected Light-Trail (SLiT) Technology
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DynaSPOT: Dynamic Services Provisioned Optical Transport Test-Bed—Achieving Multirate Multiservice Dynamic Provisioning Using Strongly Connected Light-Trail (SLiT) Technology

机译:DynaSPOT:动态服务预配置的光传输测试平台—使用强连接轻轨(SLiT)技术实现多速率多服务动态预配置

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In this paper, we report on the dynamic services provisioned optical transport (DynaSPOT) test-bed-a next-generation metro ring architecture that facilitates provisioning of emerging services such as Triple Play, Video-on-Demand (VoD), pseudowire edge-to-edge emulation (PWE3), IPTV, and Data Center Storage traffic. The test-bed is based on the recently proposed strongly connected light-trail (SLiT) technology that enables the triple features of dynamic provisioning, spatial subwavelength grooming and optical multicasting-that are quintessential for provisioning of the aforementioned emerging services. SLiT technology entails the use of a bidirectional optical wavelength bus that is time-shared by nodes through an out-of-band control channel. To do so, the nodes in a SLiT exhibit architectural properties that facilitate bus function. These properties at the network side include ability to support the dual signal flow of drop and continue as well as passive add, while at the client side include the ability to store data in order to support time-shared access. The latter (client side) improvisation is done through a new type of transponder card-called the trailponder that provides for (electronic) storage of data and fast transmission (burst-mode) onto the SLiT. Further in order to efficiently provision services over the SLiT, there is a need for an efficient algorithm that facilitates meeting of service requirements. To meet service requirements we propose a dynamic bandwidth allocation algorithm that allocates data time-slots to nodes based on a valuation method. The valuation method is principally based on an auctioning scheme whereby nodes send their valuations (bids) and a controller node responds to bids by sending a grant message. The auctioning occurs in the control layer, out-of-band and ahead in time. The novelty of the algorithm is the ability to take into consideration the dual service requirements of bandwidth request, as well as delay sensitivity. At the -hardware level, implementation is complex-as our trailponders are layer-2 devices that have limited service differentiation capability. Here, we propose a dual VLAN tag and GFP-based unique approach that is used for providing service differentiation at layer-2. Another innovation in our test-bed is the ability to support multispeed traffic. While some nodes function at 1 Gb/s, and others function at 2.5 Gb/s (using corresponding receivers), a select few nodes can support both 1- and 2.5-Gb/s operation. This novel multispeed support coalesced with the formerly mentioned multiservice support is a much needed boost for services in the metro networks. We showcase the test-bed and associated results, as well as descriptions of hardware subsystems.
机译:在本文中,我们报告了动态服务提供的光传输(DynaSPOT)测试平台,这是下一代城域网体系结构,可促进提供新兴服务(例如三重播放,视频点播(VoD),伪线边缘-边缘仿真(PWE3),IPTV和数据中心存储流量。该测试平台基于最近提出的强连接光跟踪(SLiT)技术,该技术实现了动态预配置,空间亚波长修饰和光多播的三重功能,这些功能对于提供上述新兴服务至关重要。 SLiT技术需要使用双向光波长总线,该双向光波长总线由节点通过带外控制信道分时共享。为此,SLiT中的节点具有有助于总线功能的体系结构属性。网络侧的这些属性包括支持丢弃和继续以及被动添加的双重信号流的能力,而客户端侧的这些属性包括存储数据以支持分时访问的能力。后者(客户端)即席即用是通过一种新型的应答器卡完成的,该应答器卡称为“拖尾”,该拖尾卡提供(电子)数据存储和快速传输(突发模式)到SLiT。此外,为了通过SLiT有效地提供服务,需要一种有助于满足服务需求的有效算法。为了满足服务需求,我们提出了一种动态带宽分配算法,该算法基于评估方法将数据时隙分配给节点。估价方法主要基于拍卖方案,其中节点发送其估价(出价),而控制器节点通过发送授予消息来响应投标。拍卖发生在控制层中,带外且在时间上提前。该算法的新颖之处在于能够考虑带宽请求的双重服务要求以及时延敏感性。在-硬件级别,实现很复杂-因为我们的后备攻击者是第二层设备,具有有限的服务区分能力。在这里,我们提出了双重VLAN标签和基于GFP的独特方法,该方法用于在第2层提供服务区分。我们的试验台上的另一项创新是支持多速流量的能力。尽管某些节点以1 Gb / s的速度运行,而另一些节点以2.5 Gb / s的速度运行(使用相应的接收器),但少数几个节点可以同时支持1 Gb / s和2.5 Gb / s的运行。这种新颖的多速支持与先前提到的多服务支持相结合,是城域网服务迫切需要的提升。我们展示了测试平台和相关结果,以及硬件子系统的描述。

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