Advanced Cellular Network Planning and Optimisation: 2G 2.5G by Ajay R. Mishra

By Ajay R. Mishra

A hugely useful consultant rooted in conception to incorporate the mandatory history for taking the reader during the making plans, implementation and administration phases for every form of mobile network.Present day mobile networks are a mix of the applied sciences like GSM, EGPRS and WCDMA. They even include positive aspects of the applied sciences that might lead us to the fourth iteration networks. Designing and optimising those advanced networks calls for a lot deeper realizing. complex mobile community making plans and Optimisation offers radio, transmission and middle community making plans and optimisation features for GSM, EGPRS and WCDMA networks with concentrate on useful features of the sector. specialists from all the domain names have introduced their reviews lower than one publication making it a necessary learn for layout practitioners, specialists, scientists and scholars operating within the mobile industry.Key HighlightsFocus on radio, transmission and center community making plans and optimisationCovers GSM, EGPRS, WCDMA community making plans & optimisationGives an creation to the networks/technologies past WCDMA, and explores its present prestige and destiny potentialExamines the total variety of strength eventualities and difficulties confronted via those that layout mobile networks and gives recommendation and suggestions all sponsored up with real-world examplesThis textual content will function a guide to somebody engaged within the layout, deployment, functionality and enterprise of mobile Networks."Efficient making plans and optimization of cellular networks are key to assure more desirable caliber of carrier and person adventure. in addition they shape the basic starting place for the good fortune of destiny know-how improvement, making this ebook a invaluable learn at the street in the direction of 4G."—Tero Ojanper?, leader know-how Officer, Nokia Networks

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This allows further routing of the call. Location Area Identity (LAI) Each LA has its own identifier. The Location Area Identifier (LAI) is also structured hierarchically and is internationally unique. It consists of the following parts: r Country Code (CC): 3 decimal digits; r Mobile Country Code (MNC): 2 decimal places; r Location Area Code (LAC): maximum 5 decimal places, or maximum twice 8 bits. The LAI is broadcast regularly by the base station on the Broadcast Control Channel (BCCH). Thus, each cell is identified uniquely on the radio channel and each MS can determine its location through the LAI.

Mobile Station Roaming Number (MSRN) The Mobile Station Roaming Number (MSRN) is a temporary location dependent ISDN number. It is assigned by a locally responsible VLR to each MS in its area. Calls are routed by the MS using the MSRN. On request, the MSRN is passed from the HLR to the GMSC. The MSRN has the same structure as the MSISDN: r Country Code (CC) of the visited network; r National Destination Code (NDC) of the visited network; r Subscriber Number (SN) in the current mobile network. The components CC and NDC are determined by the visited network and depend on the current location.

Spreading codes must be orthogonal. When selecting a scrambling code to be used, other spreading codes belonging to the same code branch cannot be used. This kind of hierarchical selection of scrambling codes forms a ‘code tree’. If the branch is in use spreading codes belonging to that same code branch cannot be used. Running out of code resources would create code blocking. The resource manager functionality has functions to optimise the code tree. Another step after spreading is scrambling. The baseband bit sequence is scrambled using a scrambling code.

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