R. Ballart and Y. C. Ching (1989). SONET: Now it's the standard optical network. IEEE Communications Magazine 27(3):8--15.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....This technology enables to achieve low cost and high speed optical communication systems. Table 1.1. List of recently published optical transmitters Ref. Process Channel Length or f T Optical Source Speed [Gbit s] Max. Output Current or Output voltage Eye Diagram BER Remark [3] Si Bipolar 0.6 um Off chip Laser 5 45 mA Yes No Electrical test [4] GaAs MESFET 0.5 um LiNbO electro optic Moculator 5 36 mA Yes No Measured in package Electrical test [5] AlGaAs GaAs HBT 105 GHz Modulator 20 4 V pp Yes No On wafer measure Electrical test [6] ....

R. Ballart and Y.-C. Ching, "SONET: Now it's the standard optical network," IEEE Communication Mag., pp. 9-15, Mar. 1989.

....construction. Consider a node u that is an endpoint of a heavy link (u; v) e.g. a T1 [KMS87] or slower link) that learns (from the topology update) about the existence of a lower weight link that should replace link (u; v) in the tree. We expect that the tree links will usually be SONET OC3 [BC89] and above. Node u removes link (u; v) from the tree. This is a topology change. Thus the tree root learns about it (from the topology update protocol) and moves to mend the tree. Note that the better link will be put in the tree this time. In order to prevent excessive changes to the tree node ....

R. Ballart and Yau-Chau Ching. Sonet: Now it's the standard optical network. IEEE Communications Magazine, 27(3):8--15, March 1989.

....bandwidth networks such as the Internet. Several researchers have addressed these Internet problems and have proposed infrastructure enhancements or modifications to the current Internet TCP IP based infrastructure. Infrastructure enhancements call for new technologies, for example, fiber optics [2], better and faster switch architectures [1] and new protocol layers such as B ISDN [7] ATM [12] etc. Infrastructure modifications call for implementing congestion control mechanisms in the network routers that reward rate controlled applications and punish aggressive ones. These modifications ....

Ballart R., "SONET: Now It's the Standard Optical Network," IEEE Communications Magazine, pp. 815, March 1989.

....of optics makes it possible to distribute a high frequency global clock to hundreds of receiver modules with little clock skew [15, 38] In addition, optical data signals encounter small jitters when propagating in single mode fibers for less than one kilometer even at a speed as high as 2. 5 Gbps [3, 37]. These jitters can be tolerated by using narrow (e.g. 10 bits) guard bands at each end of a time slot (up to few hundreds of bits) In the following subsections, we first illustrate row and column communications, and then discuss both hardware and control complexities of an RASOB as well as its ....

R. Ballart and Y. C. Chin, SONET: Now it's the standard optical network, IEEE Commun. Mag. 27, 3 (Mar. 1989), 8#15.

....necessary in a switchover system after a link failure is detected. With nodal clock drifts and time varying link path lengths, synchronization can be maintained in a diversity coded network comprised of SONET links by using the SONET pointers to track the changes in differential delay [16]. Other methods may be appropriate for the existing 16 DS N hierarchy. 5 Summary and Conclusions In this paper we introduced a channel coding approach, called diversity coding, to self healing and fault tolerance in digital communication networks by treating link failures as an erasure channel ....

R. Ballart and Y.-C. Ching, "SONET: Now it's the standard optical network," IEEE Com- muicatios Magazie, Vol. 27, pp. 8 15, March 1989.

....Figure 1(b) analogously, it receives fixed size cells from the network and re assembles them to packets in order to provide them to higher layer protocols. The main physical protocol adopted by the ATM standardization bodies is SONET, which is specified to scale (hierarchically) to high speeds [7]. This scaling places significant performance requirements on the communication systems used, because they have to scale and accomodate the continuously required higher link speeds. The throughput preservation 208 SERPANOS AND KARAKONSTANTIS LLC Physical Layer Higher Level Protocols (AAL 5) ....

R. Ballart and Y-C. Ching. SONET: Now it's the standard optical network. IEEE Communications Magazine, pp. 8--15, March 1989.

....bandwidth, input referred noise, and power dissipation. The simulation results show that the amplifier can meet the SONET OC 12 (622 Mbps) specifications. 1 CHAPTER I INTRODUCTION Optical fiber communication systems are gaining momentum in the area of high speed, wide bandwidth applications [1] such as long shortdistance tele communication and high performance data communication, as well as in the area of low speed, low cost data communication applications such as the automotive industry [2] Even though most optical communication systems to date rely on digital transmission, the cable ....

....using ELO technology. The CMOS amplifier is low cost at a given die size [43] easy to manufacture, and meets the physical layer specifications of the existing optical communication protocols such as FDDI (Fiber Distributed Digital Interconnect) and SONET (Synchronous Optical NETwork) [1,36]. Two CMOS amplifiers have been introduced to achieve the objective. First is a scaleable, current mode, single input amplifier. This amplifier has been integrated with a compound semiconductor photodetector and fully characterized at several data rates including 155 Mbps. Second is a ....

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R. Ballart and Y.-C. Ching, "SONET: Now it's the standard optical network," IEEE Communication Mag., pp. 9-15, Mar. 1989.

....3 switch, for example [11] which connects optical inputs to optical outputs without optical electronic conversion. The state of the switch is controlled by setting electronic bits in a switch state register. The duration of a time slot is typically equal to the duration of several hundred bits [3]. For synchronization purposes, a guard band at each end of a time slot must be used to allow for changing the state of the switches (shifting a shift register) and to accommodate possible drifting or jitter. For example, if the duration of a time slot is 276ns, which includes a guard band of 10ns ....

R. Ballart and Y. Ching, "SONET: Now it's the Standard Optical Network." IEEE Communication Magazine, 26(3), pages 8-15, 1989.

....from ECL to TTL. A variety of SMA types can be connected through the SATMI port, enabling the use of the Switch with different physical protocols. While the current SMA in use in TeraNet implements a proprietary protocol, standard protocols such as SONET Synchronous Transport Signal (STS) [18] will be implemented when devices become available. The MI is the electro optic portion of the NIU and it connects the SMA electronics to the optical media through two O E receivers and two E O transmitters. The MI converts the digital electronic data stream from the SMA into appropriate format ....

R. Ballart and Y.C. Ching. "SONET: Now it's the Standard Optical Network" IEEE Communications Magazine, March 1989.

....1 (STS 1) frame, has a bit rate of 51.84 Mbit s and is transmitted every 125 us. By synchronously multiplexing N STS 1 frames on byte by byte basis, higher order SDH s frames are obtained. For example, STS3c (c means concatenation) is a frame with bit rate of 3 x 51.83 Mbit s or 155.52 Mbit s [28]. The size of the 155.52 SDH frame is 2430 bytes; it consists of 2349 (261x9) bytes payload and 81 (9x9) bytes of overhead. Referring to figure 3.4, these bytes are transmitted row by row, from left to right. The payload itself has path overhead (9 byte) which is employed for functions such as ....

....54 bytes line overhead. The section overhead provides functions that include framing, error monitoring and maintenance; while line overhead also provides error monitoring and maintenance functions, besides providing a pointer function that is used for pointing accessing the payload in the frame [28][23] The transfer of the ATM cell streams may be conducted using the STM 1 frames for bit rate of 155.52 Mbit s, or using STM 4 frames for bit rates of 622.20 Mbit s. The ATM cells are embedded in the frame as shown in figure 3.4. STM 1 and STM 3 are equivalent to SONETs STS 3c and STS 12c ....

[Article contains additional citation context not shown here]

Ballart R. and Ching Y-C. Sonet: Now it's the standard optical network. IEEE Comm. Magazine, March 1989.

....A variety of SMA types can be connected to the standard Switch interface, allowing the use of different transmission and physical protocols. While the current SMA in TeraNet implements a non standard scheme, SMAs that implement standard protocols such as SONET Synchronous Transport Signal (STS) [15] can be implemented. TeraNet: A Multihop Multichannel ATM Lightwave Network 6 Optical Photo RF User Input Switch RF Laser RF Laser Media Interface User Output SUA o SMA 1 SMA i SUA i SMA 2 SMA i Channel Filters Shared Buffers Filter Detector Filter Optical Photo RF Filter ....

R. Ballart and Y.C. Ching, "SONET: Now it's the Standard Optical Network" IEEE Communications Magazine, March 1989.

....A variety of SMA types can be connected to the standard Switch interface, allowing the use of different transmission and physical protocols. While the current SMA in TeraNet implements a non standard scheme, SMAs that implement standard protocols such as SONET Synchronous Transport Signal (STS) [10] can be implemented. A detailed block diagram of the Switch section of the NIU is depicted in figure 6. The Switch has three Input Channels and three Output Channels. Two of the Input Channels are connected to the MIU receivers via SMA i modules. Two of the Output Channels are connected to the ....

R. Ballart, Y.C. Ching, "SONET: Now it's the standard Optical Network," IEEE Communications Magazine, March 1989.

....of 25 m. In an effort to provide a prototype distributed supercomputer computation environment, the CASA gigabit testbed was formed [5] At present, CASA links geographically distributed HIPPI networks some 100 miles distant using gateways capable of encapsulating HIPPI data over fiber optic SONET[12] links at 800Mb s. In this paper, we describe the delay and loss characteristics of HIPPI networks as extended to a wide area in the CASA network. In section 2 we describe the motivation for examining the HIPPI protocol dynamics in the CASA environment. We then give a brief discussion of the ....

Ballart, R., Ching Y., "SONET: Now it's the Standard Optical Network", IEEE Communications Magazine,

....area networks (LANs MANs) have appeared in great proliferation in the marketplace, and a large number have been deployed in commercial and academic sites. To support the diverse applications required of BISDN networks, a large number of protocols have been developed, for example ATM [1] SONET [2], SMDS [3] frame relay [4] X.25 [5] and many others. Optical fibers provide the transmission infrastructure for BISDN networks to allow transmission at hundreds of megabytes per second. Recently, international standards for BISDN has been produced by the International Telecommunications Union ....

R. Ballat and Y. Ching, "SONET: Now it's the Standard Optical Network," IEEE Communications Magazine, pp. 8--15, March 1989.

....3 switch, for example [11] which connects optical inputs to optical outputs without optical electronic conversion. The state of the switch is controlled by setting electronic bits in a switch state register. The duration of a time slot is typically equal to the duration of several hundred bits [3]. For synchronization purposes, a guard band at each end of a time slot must be used to allow for changing the state of the switches (shifting a shift register) and to accommodate possible drifting or jitter. For example, if the duration of a time slot is 276ns, which includes a guard band of 10ns ....

R. Ballart and Y. Ching, SONET: Now It's the Standard Optical Network, IEEE Comm. Magazine, vol. 26, no. 3, pp. 8-15, 1989.

....factor in determining the performance of the disk storage. By placing the blocks efficiently, it is possible to support a larger number of concurrent video sessions[RVR92, KHS94] Video warehouse uses a high speed network to deliver the service to customers all over the metropolitan area[BC89, BB94, Bou92] The existing network infrastructure is not originally designed to support time critical application. There have been a number of proposals to guarantee the continuity over the high speed communication network[Tow93, ZDE 93, SZKT96] The other community of academia and industry ....

Ralph Ballart and Yau-Chau Ching. Sonet: Now it's the standard optical network. IEEE Communication Magazine, pages 8--15, March 1989.

....Multiplexing. Partially supported by a grand from Bellcore 1 1 Introduction Emerging high bandwidth applications, such as voice video services, distributed data bases, and network supercomputing, are driving the use of single mode optical fibers as the communication media for the future [2] 3][4] [26] However, due to speed limits of electronic network access interfaces, the accessible bandwidth is far less than the bandwidth available in a single mode fiber. One solution is to use Wavelength Division Multiplexing (WDM) The WDM scheme exploits the bandwidth available in an optical fiber ....

R. Ballart, Y.C. Ching, "SONET: Now It's the Standard Optical Network," IEEE Comm. Magazine, pp. 8-15, March 1989.

....of 25 m. In an effort to provide a prototype distributed supercomputer computation environment, the CASA gigabit testbed was formed [5] At present, CASA links geographically distributed HIPPI networks some 100 miles distant using gateways capable of encapsulating HIPPI data over fiber optic SONET[12] links at 800Mb s. In this paper, we describe the delay and loss characteristics of HIPPI networks as extended to a wide area in the CASA network. In section 2 we describe the motivation for examining the HIPPI protocol dynamics in the CASA environment. We then give a brief discussion of the ....

Ballart, R., Ching Y., "SONET: Now it's the Standard Optical Network", IEEE Communications Magazine,

.... s data (packet or circuit) slots, for a 1 Gb s channel speed. This means 100 kb packets and 100 Mb s circuits. There are, however, several considerations which restrict our choice of frame and slot size. Let us first consider the choice of frame size. We recall that SONET frame size is 125 s [BC89]. SONET is the physical layer infrastructure supporting ATM [Min89] We also point out that the interconnection of the optical, T WDMA network to SONET is highly desirable, in order to extend the circuit switched service to wide geographical areas. To this regard, we recall that both FDDIII and ....

R. Ballart and Y. Ching. "SONET: Now It's the Standard Optical Network." IEEE Communications Magazine, 27(3):8--15, March 1989.

.... s data (packet or circuit) slots, for a 1 Gbps channel speed. This means 100 Kbit packets and 100 Mbps circuits. There are, however, several considerations which restrict our choice of frame and slot size. Let us first consider the choice of frame size. We recall that SONET frame size is 125 s [8]. SONET is the physical layer infrastructure supporting ATM [9] We also point out that the interconnection of the optical, T WDMA network to SONET is highly desirable, in order to extend the circuit switched service to wide geographical areas. To this regard, we recall that both FDDIII and DQDB ....

R. Ballart and Y. Ching. SONET: Now it's the standard optical network. IEEE Communications Magazine, 27(3):8--15, March 1989.

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R. Ballart and Y. C. Ching (1989). SONET: Now it's the standard optical network. IEEE Communications Magazine 27(3):8--15.

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R. Ballert and Y.C. Ching. SONET: Now it's the standard optical network. IEEE Communications Magazine, 29:8--15, 1989.

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R. Ballart and Y.C. Ching. "SONET: Now It's the Standard Optical Network." In IEEE Communications Magazine, 27(3):8-15, March 1989.

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R. Ballart and Y.C. Ching. "SONET: Now It's the Standard Optical Network." In IEEE Communications Magazine, 27(3):8-15, March 1989.

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R. Ballart and Y.C. Ching. "SONET: Now It's the Standard Optical Network." In IEEE Communications Magazine, 27(3):8-15, March 1989.

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