06 rn31546en50gla0 coverage capacity planning
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7/18/2019 06 RN31546EN50GLA0 Coverage Capacity Planning
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Capacity planning is based on:
Number of coverage sitesNeeded features
Possible micro, indoor & hotspot site implementation
Capacity planning is trade off: Coverage vs. Capacity
Increased capacity with macro layer means lower cell ranges
Increased coverage within macro layer means lower capacity
HSDPA implementation brings some new challenges
When using shared carrier with HSPA, capacity is shared between R99
& HSPA servicesIn order to guarantee high HSPA service availability then dedicated
HSPA carrier should be used. Thus Capacity in the DL is allocated for
HSDPA
In UL the capacity needs to be shared between R99 UL DCH & HSUPA
even in dedicated carrier
Capacity planning follows dimensioning results, but in detailed capacity
planning the sites can and might be needed to estimate per site method
This means that one site at the time is evaluated from the point ofcapacity
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Coverage limited scenario
Scenario is based on wrong estimation of either capacity or too lessnumber of sites
Decreasing system loading can be utilised to accommodate less
users in 1 cell
Adding more sites to overcome coverage limitation
Lower increase in generated interference floor greater cell range
more users in each cell greater actual system loading.
Capacity limited scenarioCapacity demand is higher than what can be provided by an initial
number of Node Bs, resulting to
Maximum power or loading is exceeded, no services available
HSPA throughput (UL or DL) is lower than minimum throughput
Cell capacity must be increased or the cell size decreased, or by
adding additional carriers
Reduced cell range fewer users loading the cell
Cell range decreasing commonly impacts on number of sites
Note: Capacity can also be increased with features
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