4G LTE Radio Network Planning and Optimization Archive


 

4G LTE System Architecture

LTE technology is designed to support only Packet- Switched (PS) services. While the term ‘LTE’ encompasses the evolution of the radio access network through the Evolved-UTRAN (E-UTRAN), it is accompanied by an evolution of the non-radio parameters under the term ‘System Architecture Evolution’ (SAE) which includes the Evolved Packet Core (EPC) network.

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4G LTE Downlink Channels

?Downlink Physical Channels
?Physical Broadcast Channel (PBCH)
?Physical Downlink Shared Channel (PDSCH)
?Physical Downlink Control Channel (PDCCH)
?Physical Control Format Indicator Channel (PCFICH)
?Physical Hybrid-ARQ Indicator Channel (PHICH)
?Physical Multicast Channel (PMCH)
?PBCH:
?To broadcast the MIB (Master Information  Block), RACH parameters
?
PDSCH:
?Carries user data, paging data, SIBs (cell status, cell IDs, allowed services…)
?
PMCH:
? For multicast traffic as MBMS services
?
PHICH:
?Carries H-ARQ Ack/Nack messages from eNB to UE in response to UL transmission
An illustration of LTE DL logical, transport and Physical channels is shown below:

lte channels

 

4G LTE Radio Network Planning Overview

4G LTE radio network planning process is designed to maximize the network coverage and to provide the desired capacity. LTE Radio Network Planning process is composed of following steps:

 

 

 

4G LTE Radio Coverage Dimensioning

LTE coverage dimensioning is used to obtain follwing parameters

  • Cell radius
  • Number of eNodeB for coverage requirement

A workflow for LTE coverage dimensioning is shown below:


4G LTE Radio Capacity Dimensioning

A flowchart for LTE Radio Capacity dimensioning process is shown below: 

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The number of LTE subscribers supported per cell can be calculated using the following formulas:lte planning course

 

4G LTE Network Planning using Forsk Atoll

A workflow of LTE network planning is shown below:

 

 

4G LTE Coverage Planning

An illustration of LTE coverage planning using  Forsk Atoll is shown below:

lte coverage planning atoll

 

4G LTE Network Monte Carlo Simulations

An illustration of LTE Monte Carlo simulation is shown below:

 

4G LTE Single RAN vs Network Overlay

?Mobile operators are considering the trade offs between the two primary alternative LTE deployment strategies.
?Single RAN strategy: involves the deployment of new multi-standard base stations as a common platform to add LTE while converging multiple generations of wireless network.
?In this approach operators must carefully plan the removal of legacy network equipment from each site, replacing it with a new single RAN base station with multimode radios to more efficiently support 4G services.

 

single ran lte