List of Articles router

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  1 - Evaluation of SIP signaling implementation using QoS parameters
  mojtaba jahanbakhsh azharivs azharivs maryam homayooni Ahmad akbari
  Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 More

  Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 !mso]> st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal" mso-tstyle-rowband-size:0 mso-tstyle-colband-size:0 mso-style-noshow:yes mso-style-priority:99 mso-style-qformat:yes mso-style-parent:"" mso-padding-alt:0cm 5.4pt 0cm 5.4pt mso-para-margin:0cm mso-para-margin-bottom:.0001pt mso-pagination:widow-orphan font-size:11.0pt font-family:"Calibri","sans-serif" mso-ascii-font-family:Calibri mso-ascii-theme-font:minor-latin mso-fareast-font-family:"Times New Roman" mso-fareast-theme-font:minor-fareast mso-hansi-font-family:Calibri mso-hansi-theme-font:minor-latin mso-bidi-font-family:Arial mso-bidi-theme-font:minor-bidi} Abstract The variety of services on IP networks and the need for network technology convergence have resulted in many access networks to adopt the IP technology. The Session Initiation Protocol (SIP) is an end to end application level protocol for establishing, terminating and modifying sessions and has experienced widespread use in IP networks due to its distinguished features such as being text based, independence from the underlying network, and more importantly supporting various types of mobility. In fact these features have lead SIP to be used as the core signaling protocol in the IP Multimedia Subsystem, which is the control plane proposed for next generation networks by the 3GPP community. Nevertheless, the performance of SIP servers when used by the millions of users of the next generation networks is not well established. In this paper we evaluate the performance of SIP servers using a test bed developed at the Iran University of Science & Technology. We consider eight different configurations for SIP server and also study the effect of using TCP and UDP as the transport protocol for SIP packets. We measure several parameters including call setup delay, call failure rate and SIP server throughput. Our results suggest that using SIP in large networks require using special techniques for balancing the load of SIP servers as well as mitigating temporary overloads.  Manuscript profile
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  2 - Adaptive rotation models and traffic patterns to reduce light loss in networks on optical chip
  bahareh asadi midia reshadi Ahmad khademzade mostafa karbasi
  Large number of processing cores integrated into a single chip have high growth rates. Networks on an optical chip are one of the simplest ways to solve the addressing problem between bulk interconnected networks. That's why high-performance, high-bandwidth multi-proces More

  Large number of processing cores integrated into a single chip have high growth rates. Networks on an optical chip are one of the simplest ways to solve the addressing problem between bulk interconnected networks. That's why high-performance, high-bandwidth multi-processor chips will be needed in the future. Optical chip networks were introduced as a new generation of on-chip networks that overcome all the limitations of this type of network and have many advantages such as high communication bandwidth, low transmission delay. And power consumption is low. On the other hand, networks on optical chips have challenges, one of the most important of which is the routing of optical data in the optical layer, because how the path is selected affects the optical loss factor. In this paper, routing algorithms free from the impasse of adaptive rotational models, circuit switching and various traffic patterns to reduce light loss in the optical layer by considering a 5-port unobstructed router and two-dimensional grid or Mesh will be provided. Finally, we compare the simulation results with similar methods such as the XY-based algorithm and examine the improvements obtained. Manuscript profile
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  3 - Towards Accelerating IP Lookups on Commodity PC Routers using Bloom Filter: Proposal of Bloom-Bird
  Bahram Bahrambeigy Mahmood Ahmadi mahmood Fazlali
  10.7508/jist.2017.17.004
  Nowadays, routers are the main backbone of computer networks specifically the Internet. Moreover, the need for high-performance and high-speed routers has become a fundamental issue due to significant growth of information exchange through the Internet and intranets. On More

  Nowadays, routers are the main backbone of computer networks specifically the Internet. Moreover, the need for high-performance and high-speed routers has become a fundamental issue due to significant growth of information exchange through the Internet and intranets. On the other hand, flexibility and configurability behind the open-source routers has extended their usage via the networks. Furthermore, after assigning the last remaining IPv4 address block in 2011, development and improvement of IPv6-enabled routers especially the open-sources has become one of the first priorities for network programmers and researchers. In IPv6 because of its 128-bits address space compared to 32-bits in IPv4, much more space and time are required to be stored and searched that might cause a speed bottleneck in lookup of routing tables. Therefore, in this paper, Bird as an example of existing open source router which supports both IPv4 and IPv6 addresses is selected and Bloom-Bird (our improved version of Bird) is proposed which uses an extra stage for its IP lookups using Bloom filter to accelerate IP lookup mechanism. Based on the best of our knowledge this is the first application of Bloom filter on Bird software router. Moreover, false positive errors are handled in an acceptable rate because Bloom-Bird scales its Bloom filter capacity. The Bloom-Bird using real-world IP prefixes and huge number of inserted prefixes into its internal FIB (Forwarding Information Base), shows up to 61% and 56% speedup for IPv4 and IPv6 lookups over standard Bird, respectively. Moreover, using manually generated prefix sets in the best case, up to 93% speedup is gained. Manuscript profile