GSM co-channel and adjacent channel interference analysis and optimization

A cost-effective wireless network migration planning method supporting high-security enabled railway data communication systems

“…For the GSM network, in [14], the BS placement problem in HSR environments has been addressed, and an optimized BS deployment arrangement with reducing cost is proposed, however, in this method, no attention is paid to interference. In addition to [14], in [16], an interference evaluation 105 model and an optimisation methodology to minimise the co-channel interference in the GSM network is presented. In [17], an automatic planning tool for a cellular GSM network in urban areas is presented.…”

Interference Mitigation and Control Mechanisms in Cellular Networks

“…Hence, for effective interference mitigation in GSM, factors such as the transmitter-receiver distance, azimuth, frequency reuse, and location of the network should be given adequate consideration. (Lan, et al, 2011). The WCDMA technology, used in 3G like its 2G predecessor, the CDMA, enables concurrent sharing of, and transmission on, the same RF carrier by different users (Mohan and Ravichandran, 2012).…”

“…Therefore, cell coverage, frequency allocation, and site layers are parameters that should be checked when mitigating interference in GSM. A frequency optimization algorithm is used to mitigate and control interference in GSM systems (Lan, et al, 2011). Co-channel and/or adjacent channel interference can be identified based on whether or not they are on the same cell, adjoining cell, or having azimuthal sparring.…”

“…Furthermore, interference levels are quantized into eight ( 8) levels (level 0 to level 7) from low interference to high interference. A frequency interference vector that analyses the cell site layers and interference level of cells can be defined as B = (b1,b2,b3,b4,b5,b6 ) where b1 is the main interference level, b2 is the smallest (nearest) site layer of the main interference source, b3 represents the number of the main interference sources, b4 represents the smallest site layer of the interference source, b5 represents the number of interference sources in the smallest site layer b4; and b6 represents the total number of interference sources (Lan, et al, 2011). This is also referred to as the performance vector for each frequency of a cell.…”

Quality of Service Reliability: A Study of Received Signal Quality in GSM Networks

“…The entire frequency plan is scrutinized to detect if the source is internal or external. This is done by defining proper neighbours, checking discontinuous reception (DRX) power and connectors, checking broadcast control channel (BCCH) and mobile allocation index offset (MAIO) frequency, reducing the height of the antenna, orientation and tilt, checking the neighbouring list and definition, checking the neighbouring parameters, checking DRX, checking the voltage standing wave ratio (VSWR) and RF cable connectivity, checking DRX hardware [9], checking the transmitter-receiver distance and frequency reuse [10].…”