Functionally of EPC in LTE EPC ( Evolved Universal Terrestrial Radio Access Network) Functionally the EPC is equivalent to the packet switched domain of the existing 3GPP networks. EPC consist of: –MME (Mobility Management Entity) –SAE GW represents the combination of the two gateways , Serving Gateway(S-GW) and Packet Data Network Gateway (P-GW) –Home Subscriber … Read more
What is LTE Requirement ? Peak data rate 100Mbps (DL) and 50Mbps (UL) to 20MHz Throughput increased by 3-4 times and 2-3 times for the downlink to uplink from HSDPA Rel6 (DL=14.4Mbps, to use transmitter sites that have been used in UTRA/GERAN Throughput increased by 3-4 times and 2-3 time UL=5.7Mbps) Spectrum efficiency by continuing … Read more
Less complex modulation. OFDM is a simpler modulation technique that is better suited to deployments that do not require support for mobility. License-exempt bands. Mobile services require licensed spectrum to provide coverage in wide areas. Fixed deployments, however, have often successfully used license-exempt bands in areas where interference levels are acceptable. For this reason, most … Read more
Ooredoo Group of Qatar signed 5 year contracts with Ericsson and Alcatel Lucent both. Alcatel-Lucent France Based will provide full solution of Packet Microwave, IP Routing and Optical networking ( Fiber Network Solution). The agreement is different for both Ericsson and alcatel-lucent. From which Ericson will provide solutions of radio, core and transmission and also … Read more
Two U.S. technology innovators are waging a new battle over the maps that people throughout the world access on their smartphones and other computing devices. For several years, consumers using the hand-held iPhones and iPad tablets sold by the Apple consumer products company have viewed maps supplied by one of the leading search engine … Read more
The UK mobile networks, Vodafone and O2 have announced plans to combine the basic parts of their network infrastructure to create one national grid running each operator’s independent spectrum. The two companies already share some elements of their network infrastructure under an agreement that was signed in March 2009. The companies also expect that … Read more
The photo above shows the WiMAX radio deployed in an enclosure. Note from left to right: a) copper grounding cable on the inside of the enclosure b) Ethernet connection to the data source c) Heliax “pigtail” to the antenna (Heliax is a heavy duty, lightning resistant cable) d) 110v power via an APC UPS (note … Read more
At the core of WiMAX is the WiMAX radio. A radio contains both a transmitter (sends) and a receiver (receives). It generates electrical oscillations at a frequency known as the carrier frequency (in WiMAX that is usually between 2 and 11 GHz). A radio might be thought of as a networking device similar to a … Read more
Point-to-Point(P2P) Point to point is used where there are two points of interest: one sender and one receiver. This is also a scenario for backhaul or the transport from the data source (data center, co-lo facility, fiber POP, Central Office, etc) to the subscriber or for a point for distribution using point to multipoint architecture. … Read more
Implementation Margin in LTE Implementation margin is used to include non-ideal receiver effects such as channel estimation errors, tracking errors, quantization errors, and phase noise. This implementation margin or sensitivity degradation can be used to apply some margin to the link budget to account for devices from other vendors that may have larger tolerances from … Read more