Cellular Network Planning and Optimization Part V: GSM

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Frequency reuse rateFrequency reuseMeasure for effectiveness of frequency planTrade-off: Effectiveness vs interference Multiple re-use rates increase effectiveness of fre quencyplanCluster sizeCompromise between safe, interference free planning andeffective resource usage1 3 6 9 12 15 18 21same frequencyin every celltight re-use planningnormal planning(TCH macro layer)safe planning(BCCH layer)14
TRXA transmission/reception facility is called as a tr ansceiver (TRX).Typically, a cell has several TRXs, and one frequen cy is allocated toeach TRX. The capacity of a cell can therefore be measured in thenumber of TRXs.A time slot that carries user traffic is also calle d as Traffic Channel(TCH).For user speech service 1 time slot/radio frame is reserved in TCH/Fand 1 time slot in alternating radio frames in TCH/HFor administrative purposes, e.g. providing mobile terminals withcontrol information, there is also one BCCH in each cell.This channel consumes one time slot (slot #0), and is operated by oneTRX in each cell.In physical BCCH there are at least FCCH and SCH + basic systemrelated information15
Page 1 and 2: Cellular Network Planningand Optimi
Page 3 and 4: General GSM was the first digital c
Page 5 and 6: GSM System architectureOur main foc
Page 7 and 8: Network Switching System (NSS)Mobil
Page 9 and 10: Logical channel structureGSM channe
Page 11 and 12: Channel structure FCCH = Frequency
Page 13: Frequency reuse Cluster sizes up to
Page 17 and 18: Assume thatExample Operator has 5 M
Page 19 and 20: SolutionClosest cluster sizes from
Page 21 and 22: Cell categories Commonly used cell
Page 23 and 24: Frequency hopping (FH) in GSM FH me
Page 25 and 26: FH diversity gainChannel power resp
Page 27 and 28: FH StrategiesCyclic FHIn cyclic hop
Page 29 and 30: Frequency assignment problem Classi
Page 31 and 32: Frequency assignment problem in FCA
Page 33 and 34: Simplified link budgets33
Page 35 and 36: Recall: SINR and TX powersAccording
Page 37 and 38: Simple DL link budget: Illustrative
Page 39 and 40: Link budget test example We have ma
Page 41 and 42: Link budget example/RX characterist
Page 43 and 44: Allowed propagation lossAllowed pro
Page 45 and 46: How to find detailed technical info
Page 47: Standardization documents 3GPP data

Cellular Network Planning and Optimization Part V: GSM

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