monitoring trouble shooting and network optimization

... RRC and NAS messages contain key information to perform network optimization and troubleshooting which results in the fact that when ciphering is active, traditional protocol analyzer and network ... core network is adopted from GSM and consists of two user traffic-dependent domains and several commonly used entities Traffic-dependent domains correspond to the GSM or GPRS core networks and handle: ... and identification, and handling different services Thus the HLR contains GSM, GPRS, and UMTS subscriber information Two domains handle their traffic types at the same time for both the GSM and...

Ngày tải lên: 27/10/2014, 01:04

... research e interests include wideband CDMA systems, OFDM, channel coding, channel estimation, and MIMO systems Armando Soares graduated in telecommunication and computer science engineering at ... rate (BLER) and BER performance, taking into account channel estimation, interleaving, and decoding The system level simulator is needed to model a system with a large number of mobiles and base ... simulator where several estimates for coverage and throughput purposes can be made by populating the scenario topology uniformly and giving users a random mobility The estimates are made for every...

Ngày tải lên: 22/06/2014, 22:20

... and keep network costs to a minimum in order to make 3G services economical while still providing for network upgrades on demand Since the actual demand for 3G services is still unknown and network ... the RNC and ATM concentration in the network that results in savings in bandwidth and network costs Figure 1: TDM-based access network ECI Telecom Ltd Proprietary 11 DEPLOYING A 3G ACCESS NETWORK ... expenditure on leased bandwidth and radio frequencies, must be kept to a minimum, yet allowing these networks to provide for fast growth and cost-effective bandwidth increase 3G access networks are based...

Ngày tải lên: 19/04/2014, 19:07

... Department of Broadband, Communications and the Digital Economy and the Australian Research Council through the ICT Centre of Excellence program References [1] V Chandrasekhar, J G Andrews, and A Gatherer, ... femtocell services is 40% and 26% for urban and suburban scenarios, respectively Results for voice and low data rates show marginal performance degradation in Cases and 2, and hence omitted from ... and macro cellular environments, while reducing operator costs Due to the randomness of femtocell deployments, it is crucial to understand the impacts of femtocells on the existing networks and...

Ngày tải lên: 21/06/2014, 18:20

... layer and the scheduling discipline on flow level This allows for accurate and time-efficient simulations of large UMTS networks System Description We consider a UMTS network where HSDPA and DCH ... statistical bandwidth sharing,” Computer Networks, vol 45, no 3, pp 319–332, 2004 [4] S Lu, V Bharghavan, and R Srikant, “Fair scheduling in wireless packet networks,” IEEE/ACM Transactions on Networking, ... shown in Figure Sharing Code and Power Resources between HSDPA and DCH A key issue of the radio resource management in HSDPA enhanced UMTS networks is the sharing of code and power resources between...

Ngày tải lên: 21/06/2014, 22:20

... Mode (ATM) backbone networks [50-55] With the convergence of mobile and fixed networks (backbone networks being shared by both mobile network and fixed network operators), the bandwidth provisioning ... (IMT-2000) [5] family of 3G standards UMTS covers standards for the wireless transmission and protocols, the core network architecture, services and systems aspects and mobile terminals UMTS supports ... most of the VoIP standards and QoS service models 12 Chapter 2: 2.4 Next-Generation UMTS Networks UMTS NETWORK The UMTS network forms the transport backbone for all voice and data traffic, regardless...

Ngày tải lên: 08/11/2015, 16:30

... TCP adapt bandwidth based on losses o Decouple the order of transmission and drop l RED (Random Early Discard) techniques – choose a packet randomly and drop it o Allows to share bandwidth l ... sources adhere to bandwidth requirements; Marking and Policing need to be done at the edges: Queue Management Principles for QOS Guarantees (more) o Alternative to Marking and Policing: allocate ... reserve resources to support the traffic l contract between the source and the network l – source: traffic description – network: QoS guarantee if the traffic conformsto the description – if the...

Ngày tải lên: 06/04/2013, 11:05

... Centralized Splitters in FTTP Networks Network Testing Ability The second benefit of a centralized splitter approach is its ability to provide easy testing and troubleshooting access It is very ... still be whether or not to forfeit the benefits of easier troubleshooting, lower signal loss, and overall flexibility of the distribution network The centralized 1x32 splitter with distribution ... Cascaded Optical Splitter Network Diagram Advantage of Centralized Splitters in FTTP Networks Central Office up to 1xN Splitter (N up to 32) FTTP Centralized Optical Splitter Network Architecture...

Ngày tải lên: 16/10/2013, 05:15

... phones, and controls handovers from BTS to BTS The BSC provides all the control functions and physical links between CHAPTER SHORT TECHNICAL OVERVIEW OF WIRELESS NETWORKS the MSC and BTS and BTS handles ... of Coding Schemes and the number of time slots, GPRS standards have stated 29 handset classes Two of the handset classes are typically implemented, class and class 10 A class handset can only use ... There are also three handset classes for devices Class A handsets are able to send or receive data and voice at the same time Class B handsets are able to send or receive data and voice but not at...

Ngày tải lên: 18/10/2013, 12:15

... Congestion and Error Control in Multicast Overlay Networks 4.1 Overlay Networks 4.2 QoS Routing in Overlay Networks 4.3 Multicast Overlay Networks ... extending their network infrastructures and resources to handle emerging applications and a growing number of users However, in order to enhance the performance of an operational network, traffic ... of overlay networks have emerged in the Internet The idea of overlay networks is not new Internet itself began as a data network overlaid on the public switched telephone network and even today,...

Ngày tải lên: 26/10/2013, 17:15

... Firewall commands used to implement the DHCP server feature are described in the dhcpd command page and the debug command page in the Cisco PIX Firewall Command Reference Refer to these command pages ... route static command Note The clear ip command can be also used to release and renew the DHCP lease, but this clears the configuration of every PIX Firewall interface Monitoring and Debugging the ... Firewall vpdn command The vpdn command is used to enable remote access protocols, such as L2TP, PPTP, and PPPoE To use the vpdn command, you first define a VPDN group and then create individual users...

Ngày tải lên: 27/10/2013, 07:15

... ability to provide easy testing and troubleshooting access It is very difficult to use an optical time-domain reflectometer (OTDR) to test multiple splitters unless the network is built with each ... still be whether or not to forfeit the benefits of easier troubleshooting, lower signal loss, and overall flexibility of the distribution network Cascaded splitter architectures, in certain situations, ... Cascaded Optical Splitter Network Diagram Advantage of Centralized Splitters in FTTP Networks Central Office up to 1xN Splitter (N up to 32) FTTP Centralized Optical Splitter Network Architecture...

Ngày tải lên: 04/11/2013, 13:15

... addresses provide for 128 (27) total networks, with each network containing 16,777,216 (224) hosts This is achieved by designating the first octet as the network ID and the remaining octets as the ... for an extremely large number of networks, with a small number of hosts per network For the Class C address space, the first octets are designated as network ID, and the last octet is designated ... to the network through the use of the network ID This translates into an efficient routing environment because it is easy for a router to determine what networks can be grouped together and treated...

Ngày tải lên: 07/11/2013, 06:15

... Centralized Splitters in FTTP Networks Network Testing Ability The second benefit of a centralized splitter approach is its ability to provide easy testing and troubleshooting access It is very ... still be whether or not to forfeit the benefits of easier troubleshooting, lower signal loss, and overall flexibility of the distribution network The centralized 1x32 splitter with distribution ... Cascaded Optical Splitter Network Diagram Advantage of Centralized Splitters in FTTP Networks Central Office up to 1xN Splitter (N up to 32) FTTP Centralized Optical Splitter Network Architecture...

Ngày tải lên: 20/12/2013, 22:15

... IPv6-enabled network devices via a variety of network management products to include DNS, DHCPv6, device management, and monitoring; and also network management, troubleshooting, and reporting ... 3750-acc-1 and 3750-acc-2 have been configured with the “dual-ipv4 -and- ipv6” SDM template using the sdm prefer dual-ipv4 -and- ipv6 default command For more information about the sdm prefer command and ... random-detect min-threshold wrr-queue random-detect min-threshold wrr-queue random-detect min-threshold wrr-queue random-detect max-threshold wrr-queue random-detect max-threshold wrr-queue random-detect...

Ngày tải lên: 21/12/2013, 06:16

... terms of overall network flexibility, testing and troubleshooting Standards Today, the SC connector type is standard in both the inside plant and the outside plant applications The standard that dictates ... important for an analog video overlay The Network To understand why APC connectors are used in a PON optical network, it is important to understand the theory and technology involved when converting ... the PON The WDM filter is not a standard 1310 nm/1550 nm filter; instead, it is designed to route 1310 nm and 1490 nm wavelengths to the OLT and ONT respectfully and the 1550 nm wavelength to the...

Ngày tải lên: 21/12/2013, 08:17

... information networks In Papers and 2, the focus is on spam and its consequences to privacy and information networks Papers and explore adware and spyware programs, and their effects to computers, networks, ... my parents, Lena and Clas, for everlasting support and love, and for teaching me the value of humour and hard work Special thanks also go to my sister Lotta, her husband Niklas and their amazing ... Carlsson and Andreas Jacobsson In Proceedings of the 8th Nordic Workshop on Secure IT Systems (NordSec2004), Helsinki Finland, 2004 Paper Privacy and Unsolicited Commercial E-Mail Andreas Jacobsson and...

Ngày tải lên: 16/01/2014, 16:33

... Lumetta and M Medard, “Towards a deeper understanding of link restoration algorithms for mesh networks,” in Proceedings of IEEE INFOCOM ’01 [7] R Barry, S Finn and M Medard, “WDM loop-back in mesh networks,” ... “Optimal physical diversity algorithms and survivable networks”, in Proceedings of IEEE Symposium on Computers and Communication, 1997 [11] R Bhandari, Survivable Networks: Algorithms for Diverse Routing, ... pair of nodes (s ,t) and a family F of subsets of E, there is a pair of F-disjoint paths between s and t if and only if F can be partitioned into two non-empty sub-families F1 and F2, such that...

Ngày tải lên: 20/01/2014, 23:20

... of IPv6-enabled network devices via a variety of Network Management Products to include DNS, DHCPv6, device management and monitoring and also network management, troubleshooting and reporting ... troubleshooting and monitoring HSRP is if “debug standby” commands are enabled, both IPv4 and IPv6 output is shown This can be bad if the standby hello timers are set to low values and the debug ... (VLAN100) and printer (VLAN300) VLANs and standby for the voice (VLAN200) VLAN 2800-br2-2 would be HSRP active for the voice (VLAN200) VLAN and standby for VLAN 100 and 300 This works fine and is...

Ngày tải lên: 24/01/2014, 10:20

... Chapter 4, “Deploying RSTP and MSTP” Provides guidelines and examples for implementing RSTP and MSTP Cisco AVVID Network Infrastructure: Implementing 802.1w and 802.1s in Campus Networks 956652 vii ... be put in-service and taken out-of-service without impacting other blocks or the core of the network This greatly enhances the ease of troubleshooting, problem isolation, and network management ... interoperability issues between MSTP and legacy protocols MSTP seamlessly interoperates with standard 802.1q CST networks, however, only a handful of networks are based on the 802.1q standard because of its...

Ngày tải lên: 24/01/2014, 10:20