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- TCP Over CDMA2000 Networks: A Cross-Layer Measurement Study
- Modern cellular channels in 3G networks incorporate sophisticated power control and dynamic rate adaptation which can have a significant impact on adaptive transport layer protocols, such as TCP. Though there exists studies that have evaluated the performance of TCP over such networks, they are based solely on observations at the...
- Tags: Network, TCP, Springer Science+Business Media, Tcp/Ip, Networking
- White papers 2007-02-09
- Network Fundamentals
- Wired network architectures encountered at customer sites fall into two classifications: switched Layer 2 networks or routed Layer 3 networks. The fundamental difference between these network types is the communications protocol layer relied upon for propagating data across network resources. An understanding of layered communications protocols and the underlying services...
- Tags: Network, Symbol Technologies Inc., Networking
- White papers 2005-04-01
- MPLS Over Transport Network: Two Layer Approach to Network Design With Statistical Multiplexing
- The possibility of adding MPLS support to transport networks is considered an important opportunity by telecom carriers that want to add packet services and applications to their networks. However, the question arises whether it is convenient to add MPLS nodes just at the edge of the network to collect packet...
- Tags: MPLS, Network, Network Design, Network Technology, Networking
- White papers 2006-02-17
- Layer 3 Switching for Secure Networks
- The adoption of layer 3 switches with security functionality simplifies network management and reduces cost of ownership and can also provide resiliency. Enterprises also are benefiting from WAN access functionality in Layer 3 boxes, which enables them to be deployed at the network's edge, obviating the need for traditional WAN...
- Tags: Secure Networks, Layer 3, Network, CyberPath, Trade-off, Networking
- White papers 2005-10-26
- Any Transport Over MPLS
- Any Transport over MPLS AToM transports Layer 2 packets over a Multiprotocol Label Switching MPLS backbone. AToM enables service providers to connect customer sites with existing data link layer (Layer 2) networks, by using a single, integrated, packet-based network infrastructure - a Cisco MPLS network. Instead of separate networks with...
- Tags: Layer 2, AToM, MPLS, Network, Network Technology, Networking
- White papers 2007-11-13
- Traffic-Based Reconfiguration for Logical Topologies in Large-Scale WDM Optical Networks
- Wavelength-Division Multiplexing WDM technology has emerged as a promising technology for backbone networks. The optical layer based on WDM technology provides optical routing services to the upper layers such as the packet - switching layer and the Time-Division Multiplexing TDM layer over the Generalized MultiProtocol Label-Switching GMPLS paradigm. The set...
- Tags: Topology, WDM, Optical Networking, Networking
- White papers 2005-10-01
- Nortel Networks L2/3 Ethernet Switch Module for IBM eServer BladeCenter
- This paper positions the Nortel Networks Layer 2/3 Fiber and Copper GbE Switch Modules for IBM eServer BladeCenter and describes how its integrated switch options enable the consolidation of full Layer 2-3 LAN switching and routing capabilities. The paper serves as a Best Practices guide for implementing, configuring, and managing...
- Tags: Ethernet Switch, IBM eServer BladeCenter, Nortel Networks Corp., IBM eServer, IBM Corp., Fiber, Network Technology, Blade Servers, Networking, Servers, Hardware
- White papers 2005-09-01
- Application Switching With Nortel Networks Layer 2-7 Gigabit Ethernet Switch Module for IBM BladeCenter
- This paper positions the Nortel Networks Layer 2-7 GbE Switch Modules for IBM eServer BladeCenter and describes how its integrated switch options enable the consolidation of full Layer 2-7 LAN switching and routing capabilities. The paper serves as an update to the IBM eServer BladeCenter Layer 2-7 Network Switching, REDP-3755-00....
- Tags: Ethernet, IBM eServer BladeCenter, Nortel Networks Corp., IBM eServer, Gigabit Ethernet, IBM Corp., Blade Servers, Utility Computing, Servers, Hardware
- White papers 2006-03-01
- A Cross-Layer Strategy for Energy-Efficient Reliable Delivery in Wireless Sensor Networks
- This paper investigates the problem of the lifetime maximization in wireless sensor networks under the constraint of end-to-end transmission success probability, by adopting a cross-layer strategy that considers physical layer (i.e., power control), MAC layer (i.e., retransmission control) and network layer (i.e., routing protocol) jointly. The paper decouples the problem...
- Tags: Algorithm, Network, Sensor, Wireless, Engineering, Networking
- White papers 2006-12-01
- A Software Architecture for Cross-Layer Wireless Network Adaptations
- Conventional data networks are based on a layered architecture. The introduction of wireless networks has created a need to violate this layered discipline to create cross-layer designs or adaptations. Ad-hoc implementations of such cross-layer adaptations reduce the level of modularity and abstraction in the network's implementation, giving rise to a...
- Tags: Software, Network, Implementation, Adaptation, Wireless Network, Wi-Fi, Wireless, Networking
- White papers 2006-09-08
- A Network Layer Architecture for Personal Networks
- Personal Networks PN is a new concept related to pervasive computing with a strong user-focused view. While several existing technologies can offer solutions to part of a person's future communication needs, there is very little work on combining these technologies into something a normal user can handle. It will undoubtedly...
- Tags: Network, Personal Networks, Networking
- White papers 2008-01-01
- A Simple and Effective Cross Layer Networking System for Mobile Ad Hoc Networks
- This paper proposes a novel cross layer design concept that could improve the network throughput significantly for mobile ad hoc networks. The channel reservation control packets employed at the MAC layer can be utilized at the physical layer in exchanging timely channel estimation information to enable an adaptive selection of...
- Tags: Mobile, Network, University Of Texas, Networking
- White papers
- C-Snoop: Cross Layer Approach to Improving TCP Performance Over Wired and Wireless Networks
- TCP continues to be the most important transport layer communication protocol. In heterogeneous wired and wireless networks, however, the high packet loss rate over wireless links can trigger unnecessary execution of TCP congestion control algorithms, resulting in performance degradation. Several solutions have been proposed to address the known problems that...
- Tags: Wired Inc., Network, TCP, Wireless Network, Tcp/Ip, Wi-Fi, Wireless, Networking
- White papers 2007-03-01
- Ethernet Services and Service Delivery Technologies in the Metro
- The world of telecommunications is driven by changes in consumption patterns. These include changes from legacy TDM to VoIP, from TDM leased lines to Layer 1, Layer 2, and Layer 3 VPNs, from TDM-based 2G and 2.5G mobile networks to data-centric 3G networks, and from simple best effort high-speed Internet...
- Tags: Network, ECI Telecom Ltd., Ethernet, Networking, Cellular Phones, Network Technology, Smb/Sme, Wireless, Consumer Electronics, Personal Technology
- White papers 2007-02-01
- TCP Performance Dynamics and Link-Layer Adaptation Based Optimization Methods for Wireless Networks
- Almost a decade long research on the performance of TCP in wireless networks has resulted in many proposals and solutions to the problem of TCP throughput degradation. Several of these measures, however, have their share of drawbacks. With the continuing emergence of wireless technologies ever since the work on TCP...
- Tags: Network, TCP, Wireless Network, Tcp/Ip, Networking, Wi-Fi, Wireless
- White papers 2007-04-01
- Multi-Layer Network Design With Multicast Traffic and Statistical Multiplexing
- The new packet services and applications are radically changing not only traffic demands but also the architecture of transport networks. Adding packet layer support into backbone nodes is considered an important opportunity by telecom carriers that want to integrate packet technologies of the access and metropolitan networks within their networks...
- Tags: Network, Network Design, Networking, Network Administration
- White papers 2007-07-27
- MPLS VPNs: Layer 2 or Layer 3? Understanding the Choice
- Since there's been data networking, there's been a debate between switched and routed architectures - stated in OSI terms, between performing functions at Layer 3 or Layer 2. Today, we see it again surfacing as network architects consider the design of Virtual Private Networks VPNs that take advantage of Multi-Protocol...
- Tags: MPLS VPN, Layer 2, Layer 3, MPLS, VPNs, Networking, Network Security, Telecommunications
- White papers 2002-07-05
- Providing Multi-Layer Security Support for Wireless Communications Across Multiple Trusted Domains
- Recently many link layer security protocols have been developed and deployed to protect the wireless communications in local area networks. However, cryptanalysis has revealed lots of insecurities and vulnerabilities of the link layer protocols. This paper studies a multi-layer alternative. Compared to a link layer approach, the multi-layer architecture provides...
- Tags: Wireless Communication, Domain, Wi-Fi, Wireless, Security
- White papers
- Impact of Upper Layer Adaptation on End-to-End Delay Management in Wireless Ad Hoc Networks
- A good amount of research has been developed to support QoS issues in IEEE 802.11 ad hoc networks, such as QoS routing, MAC layer QoS support, and cross-layer QoS design. However, QoS solution at upper layers for real-time multimedia applications is overlooked. This paper investigates impact of the adaptation mechanisms...
- Tags: QoS, Middleware, Wireless, Layer Adaptation, Middleware Adaptor
- White papers 2006-02-03
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