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UMTS Network Structure

UTRAN (UMTS Terrestrial Radio Access network) structure The UTRAN consists of one or several Radio Network Subsystem ( RNS ), each containing one RNC and one or several NodeB. Interface Iu interface: the Iu interface connects the UTRAN to the CN and is split in two parts. The Iu-CS is the interface between the RNC … Read more

Work of MA, HSN and MAIO in GSM

Mobile Allocation The MA is a list of hopping frequencies transmitted to a mobile every time it is assigned to a hopping physical channel. The MA-list is a subset of the CA list. The MA-list is automatically generated if the baseband hopping is used. If the network utilizes the RF hopping, the MA-lists have to … Read more

Windows Phone OS sees steady growth in 1 quarter of 2013

Although only 5.6% of sales of smartphones in the first quarter of 2013, Windows showed continued growth, gaining 1.9% compared to the same period last year, according to data released today by Kantar hundred Worldpanel Comtech. Almost half (49.3%) Smartphone sales, remains the best selling Android operating system, but saw only a slight increase compared … Read more

What is Side and Back Lobes in LTE antenna

Side and back lobes are regions in a template where the “directions” the antenna may be of benefit, except for the maximum rate. System engineer Note these characteristics with downtilting antenna as part Lobe (petal, which appears above the horizon in the vertical model) can lead to interference. Mechanical downtilting antennas will directly affect the … Read more