Effectective Bandwidth Utilization in a NG- SDH Network

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1 Effectective Bandwidth Utilization in a NG- SDH Network S. Helan santhiya, G.Janani, R.Mohana Jothi, S.Subalakshmi Department of Electronics and Communication, Ponnaiyah Ramajayam College of engineering and technology, Thanjavur , India S.Maheshwaran.M.E., Assistant professor of Electronics and Communication engineering Ponnaiyah Ramajayam College of engineering and technology, Thanjavur , India Abstract: In fiber optic transmission network, bandwidth is being carried out by existing conventional method in SDH environment and supports only well data rate. Difficulty of mapping newer, inefficient use of transport network and inability to increase or decrease available bandwidth are the limitation of SDH system. It is proposed in our projects which suitable for present data rate and application requirements by customers and ensures the QOS. We are going to increase the bandwidth performance of the NG- SDH system and also adding the newer customers. To solve this problem a new approach is suggested in our project which will increase the Bandwidth utilization which in turn helps in including newer customers with required QOS advantage enables more implementations for service providers. a. Multi service provisioning platform (MSPP) A Multiservice Provisioning Platform (MSPP) is basically the result of the evolution of legacy ADM and TDM interfaces and optical interfaces, to a type of access node that includes a set of: legacy TDM interfaces data interfaces, such as Ethernet, GigE, Fiber Channel, or DVB.NG SDH/SONET Keyword: MSPP, QOS, VCAT, LCAS, GFP. I.INTRODUCTION Traffic and revenue trend be dynamically increased or decreased as demand changes. In a word, bandwidth of a NG-SDH circuit will be increased during peak hours and will be decreased otherwise. The actual bandwidth are observed and dynamically adjusted to meet the actual demand. Service providers can use bandwidth more efficiently, and provide customers with more flexible service fee policies. For traditional SDH network, operators have to drop the circuit, reset bandwidth, and restart traffic to change the bandwidth of a circuit; For NG-SDH network, operators can increase or decrease bandwidth of a circuit,with Network Management System. This b. Virtual concatenation (VCAT) Packet-oriented, statistically multiplexed technologies, such as IP or Ethernet, do not match well the bandwidth granularity provided by contiguous concatenation. VCAT is an inverse multiplexing technique that allows granular increments of bandwidth in single VC-n units. At the source node VCAT creates a continuous payload equivalent to X times the VC-n. The set of X containers is known as a Virtual Container Group (VCG), and each individual VC is a member of the ITU-T as G.7042, designed to ISSN: Page 99

2 manage the bandwidth allocation of a VCAT path. LCAS can add and remove members of a VCG that control a VCAT channel. LCAS cannot adapt the size of the VCAT channel according to the traffic pattern. Source to Sink messages: Multi- Frame Indicator (MFI) keeps the multi frame sequence. Sequence Indicator (SQ) indicates member s sequence to reassemble correctly the client signal that was split and sent through several paths. Control (CTRL) protocol messages which can be fixed, add, norm, EOS, idle, and DNU. Group Identification (GID) is a constant value for all members of a VCG. Sink to Source include: Member Status (MST), which indicates to source each member status: fail or OK. Re-Sequence Acknowledge (RS-Ack) is an Ack of renumbering after a new EOS member. d.1. GFP-F (FRAME) The entire client packet is dropped into a GFP frame. Data Client signals such as Ethernet, PPP and DVB are queued waiting to be mapped. Some codes can be removed to minimize the transmission size. d.2. GFP-T (TRANSPARENT) c. Link capacity adjustment scheme (LCAS) ITU-T as G.7042, designed to manage the bandwidth allocation of a VCAT path. LCAS can add and remove members of a VCG that control a VCAT functionalities such as GFP, VCAT and LCAS optical interfaces from STM-0/STS-1 to STM-64/OC-192. GFP-T client signals are mapped into fixed-length GFP frames and transmitted immediately. a. Introduction to PDH: II. SDH AND PDH d. Generic frame protocol (GFP) GFP, defined in ITU-T G.7041, provides data rate adaption and frame delineation: There are two mapping service for data protocols: 1. GFP-T (Transparent) is a layer 1 encapsulation in constant sized frames. Optimized for traffic based on 8B/10B codification such as 1000BASE-T, Fiber Channel, and ESCON. 2. GFP-F (Framed) is a layer 2 encapsulation in variable sized frames. Optimized for data packet protocols such as DVD, PPP and Ethernet. Plesiochronous Digital Hierarchy. The term plesiochronous is derived from Greek plesio meaning near, and chronos, The basic data transfer rate is a data stream of 2048 kbps(kilobits/second). For speech transmission.in order to move multiple 2 Mbit/s data streams from one place to another, they are combined together, or "multiplexed" in groups of four. ISSN: Page 100

3 b. Introduction to SDH: It is an international standard networking principle and a multiplexing method. The name of hierarchy has been taken from the multiplexing method which is synchronous by nature. The evolution of this system will assist in improving the economy of operability and reliability of a digital network. demanding long haul transport that today can only be provided by SDH/SONET. These technologies have a massive installed base, developed over recent decades. SDH/SONET has now evolved, and is ready to adapt to the new traffic requirements. Next Generation SDH enables operators to provide more data transport services while increasing the efficiency of installed SDH/SONET base, by adding just the new edge nodes, sometime known as Multi Service Provisioning Platforms (MSPP) /Multi Service. Switching Platforms (MSSP), can offer a Combination of data interfaces such as Ethernet, 8B/10B, MPLS (Multi Protocol Label Switching) or RPR (Resilient Packet Ring), without removing those for SDH/PDH. This means that it will not be necessary to install an overlap network ormi grating all the nodes or fiber optics. This reduces the cost per bit delivered, and will attract new customers while keeping legacy services. In addition, in order to make data transport more efficient, SDH/SONET has adopted a new set of protocols that are being installed on the MSPP/MSPP nodes. These nodes can be interconnected with the old equipment that is still running.hence, Next Generation SDH = Classic SDH + [GFP+VCAT+LCAS] b.block diagram of NG-SDH: a.next generation SDH: III. PROPOSED SYSTEM Innovation, the lifeline to survival in the telecommunication market, has spurred the telecommunication industry to adopt NGSDH as the most economic and technologically feasible solution for transmitting voice & data over carrier network. The new applications, mostly relying on data packet technology, offer easy implementation and access to applications based on the Internet, Mobile, Multimedia, DVB, SAN, Ethernet or VPN. The architectures are increasingly Following major issues that exist in the legacy SDH: Difficulty of mapping newer (Ethernet, ESCON, FICON, Fiber Channel etc.) services to the existing SDH transport network. Inefficient use of the transport network in delivering data services. Inability to increase or decrease available bandwidth to meet the needs of data services without impacting traffic. ISSN: Page 101

4 IV. HARDWARE CONFIGURATION Fig.4.1 configuring the IP address of the STM system to the pc Fig.4.2 Indicate the errors and problems occurs in the system and rectify it at right time to improve the QOS Fig 4.4 provide port rate limiting to the customers V.CONCLUSION SDH cannot be considered anymore as a legacy technology. The evolution to next generation SDH is the future. NG-SDH can deliver packet and TDM services. And NG-SDH is more competitive and cheaper. NG-SDH will be the dominant technology in the up coming new generation. Is being adopted not only by incumbent operators and carriers but also by new ones. It is interesting to consider the adoption of RPR and/or MPLS to enhance the feature of the Ethernet + NG SDH tandem to layer 2 protection, QOS and multipoint access. Video transport and Storage over NG SDH is just starting to impact in today s networking Automatic layer 1 reconfiguration complements Layer 2 RPR reconfiguration High reliability equivalent similar in core and metro Centralized management of events, bandwidth provisioning Next Generation network (such as MSPP, MSSP) elements will be as fundamental to telecom networks in the coming decade as routers were to the Internet of the 90s. Optical layer integration is a must for NG SDH using MSPP that will provide higher flexibility and Lower Capital Expense (Capex) operational expense (Opex). It is only necessary to migrate the edges to get a full Next Generation SDH network. And also we increase the bandwidth performance of 52 % to 80 %. By increasing this bandwidth performance the users are also added and efficiently use this network. IT IS TODAY S BEST COMBINATION FOR DATA AND CIRCUIT TRANSPORT VI. References Fig 4.3 Alarms indication for all the chords in the STM system with the acknowledgement [1] A. M. Adas, Supporting real time VBR video using dynamic reservation based on linear prediction, INFOCOM 1996, pp , [2] S. Chong et al., Dynamic bandwidth allocation for efficient transport of real-time VBR video, INFOCOM 1994, pp , ISSN: Page 102

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