Study of Fast packet switches architectures for Asynchronous Transfer mode

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

Broadband ISDN networks, of which ATM is the accepted transfermode solution, require fast packet switches to move the ATM cells alongtheir respective virtual paths. The prime purpose of an ATM switch is toroute incoming cells (packets more generally) arriving on a particular inputlink to the output link, which is also called the output port, associated withthe appropriate route. The subject of this thesis is to discuss the three basictechniques that have been proposed to carry out the switching (routing)function: space-division, shared-medium, and shared-memory. The basicexample for a space-division switch is a crossbar switch, which has alsoserved circuit-switched telephony networks for many years. The inputs andoutputs in a crossbar switch are connected at switching points calledcrosspoints, resulting in a matrix type of structure. New decomposedcrossbar switches architecture is developed recently so as to minimize theinput and output cell contention, this new architecture is discussed in thisthesis. The operation of a shared-medium switch, on the other hand, is basedon a common high-speed bus. Cells are launched from input links onto thebus in round-robin fashion, and each output link accepts cells that aredestined to it. A more enhanced architecture of this type; a TDM-BasedMultibus Packet Switch is discussed in this project. The shared-memory(SM) switch, consists of a single dual-ported memory shared by all input andoutput lines. Packets arriving on all input lines are multiplexed into a singlestream that is fed to the common memory for storage; inside the memory,packets are organized into separate output queues, one for each output line.Simultaneously, an output stream of packets is formed by retrieving packetsfrom the output queues sequentially, one per queue; the output stream is thendemultiplexed, and packets are transmitted on the output lines. This projectpresents a survey of the buffer management methods that have beenproposed for shared-memory packet switches. Several buffer managementpolicies are described, and their strengths and weaknesses are examined. Theperformances of various policies are evaluated using computer simulations.A comparison of the most important schemes is obtained with the help of thesimulation results and the results provided in the literature. The surveyconcludes with a discussion of the possible future research areas related tothe Fast packet switch architectures

روابط وملفات

التعريف والنوع

رقم الوثيقة

1021d694-4011-46df-85e3-2ada74364e62

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1637082_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"ElRasheed Osman Khidir","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Nassir Mohammed Elbakri Elzein","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Study of Fast packet switches architectures for Asynchronous Transfer mode

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

ElRasheed Osman Khidir

الإعداد

Nassir Mohammed Elbakri Elzein

الاقتباسات الببليوغرافية