In this paper, a comprehensive performance analysis is carried out to quantify the impact of pci planning on user quality of service and network capacity in the downlink of lte. With the introduction of multibeam antennas, operators have raised some pci planning concerns that have limited their adoption of such solutions. These signals are specific to nr physical layer and provides following information required by ue for downlink synchronization. Lte resource pci learning orthogonal frequency division. Robust pci planning for long term evolution technology. Ntt docomo launched japans first lte service in december 2010 to provide its customers with higher trans. A pci planning algorithm for jointly reducing reference signal collisions in lte uplink and downlink.
Describe the procedure of pci planning plan the pci in the live network pci. Pci collisions happen whenever a lte cell has a neighbor lte cell with identical pci in the same frequency band 4. Pci dssattestation of compliance and report of compliance. In long term evolution lte networks, physical cell identity allocation pci is crucial for quality of service and somewhat similar to scrambling code allocation. The planning of physical cell identities pci has a strong impact on the performance of long term evolution cellular networks. A careful observation of lte standards shows that pcfich location is a function of two variables the pci and the bandwidth deployed. Similar to scrambling codes in umts,it identifies the cell in cell search process. Although several pci planning schemes have been proposed in the literature, no study has quantified the performance gains.
Get 4g lte training through worlds finest expert hd videos by telcoma. Pci planning strategies for long term evolution networks halinria. Harish vadada one frame 10 ms pss sss 6 resource blocks 72 center subcarriers two synchronization signals synchronization signals synchronization signals synchronization. Pdf use of physical cell identity pci on designing 4g. Atoll was the first lte network planning software on the market in 2008. Like lte, 5g nr also has synchronization signal and known as primary synchronization signal pss and secondary synchronization signal sss. Dec 01, 2017 amr ashraf lte radio solution architect. Physical cell id, is used to generate scrambling code to identify different cells. However, the user equipment ue cannot distinguish between two cells if they both have the same pci and frequency, a situation called as pci con. It is identical to the pdf calendar, plus it includes helpful links to additional research and information on various topics. Lte in different regions with different frequency bands and bandwidths available. The 2019 pci compliance annual plan is also outlined below.
Introduction ntt docomo launched japans first lte service in december 2010 to provide its customers with higher transmission speeds, greater capacity and lower delay. This article explains the rules that are used to plan the pcis while also debunking myths associated to these rules. Description download lte pci planning guide comments. Bad or wrong planning can affect the synchronization procedure, demodulation, and handover signalling and degrade the network performs. Methodology for the physical cell identity assignment in lte networks zaid matloub, ivica kostanic electrical and computer engineering, florida institute of technology abstract a methodology has been developed for an efficient pci planning of an lte. Audit, optimize, and plan lte settings for pci, rsi, and cellrange. Pci planning example upon completion of this course, you will be able to. Long term evolution is one part of the 4g technology which targets the radio network evolution. Pci planning is more important because if optimal pci is not assigned to enodeb the signals will overshoot and cause. Since then, we have been expanding the lte coverage area. A pci planning algorithm for jointly reducing reference signal. Pci planning is one of the most important things to understand while planning an lte network and it is usually left untouched in most of the lte manuals and textbooks.
As already explained, the pci is decoded using the sss and the pss and can be given by the following equation. Therefore, pci planning is one of the most important steps in lte network planning and construction. Pci, or layer 1 identity, is an essential configuration parameter of a radio cell. Its a problem that is worth studying how to determine the pci planning in tdlte. As the networks trafc increases and the networks are getting denser, this planning gets even more important. A proper assignment of pcis must prevent neighbor cells from using the same dm rs to avoid interference problems, thus ensuring adequate performance both in control. Pdf pci planning based on binary quadratic programming in lte. Pci planning in lte physical cell idpci the pci is. In lte networks, there are several properties that need to be carefully. For any lte network, good pci planning is a fundamental requirement. As of the end of july 2011, approximately 1,700 lte base stations evolved node. The pci itself is made up of pss and sss, where pss has three values 0 to 3 while the sss has 168 values 0 to 167. Physical cell id pci planning, an effective approach to eliminate ici, is required to reduce collision, confusion and mod q interference, where.
The pci planning process consists of both the planning of an entirely new network where. Jan 17, 2016 the physical cell identity is an essential configuration parameter of a radio cell in lte. The 2019 pci compliance annual plan pci compliance guide. In this section, we explore these concerns and propose specific workarounds. Pdf a pci planning algorithm for jointly reducing reference signal. The location of 4 regs of pcfich depends on pci and system bandwidth but pcis are 504, so cells with differfull description.
Pci planning based on binary quadratic programming in lteltea networks. Practical introduction to lte radio planning itswiki. Many kpis can be adversely impacted if the network lacks an optimal pci plan. The pci planning process consists of both the planning of an entirely new. In this paper simulation results, in order to optimize pci planning in lte networks is. Its the premise of the establishment of a communication link between the user terminal and the base station. Lte network planning training course and certification lte pl. Robust pci planning for long term evolution technology by. In long term evolution lte systems, the physical cell identity pci assigned to a cell during network planning determines the set of sequences used by subscribers as demodulation reference signals dm rs in the uplink ul. Pci planning proper physical cell identities pci planning, for lte networks can result in improved performances. Lte resource pci learning free download as powerpoint presentation. Each 5g nr cell corresponds to a physical cell id pci and it is used to distinguish cells on the radio side. It includes lte psssss to pci converter and lte pci to psssss converter.
Analysis of the impact of pci planning on downlink throughput. So for lte network we have pci 0 pss 0, sss 0 to pci 503 pss 2, sss 167. In long term evolution lte networks, physical cell identity allocation pci is crucial for quality of. A proper assignment of pcis must prevent neighbor cells from using the same dm rs to avoid interference problems, thus. Pci planning schemes have been proposed in the literature, no study has quantified the performance. So for this network, pci planning is more importance because if optimal pci is not assigned to enodeb the signals will overshoot and cause interference. In long term evolution lte networks, physical cell identity allocation pci is crucial for quality of service and somewhat similar to scrambling code alloca tion in wcdma. Lte is specified from release 8 and 3gpp release is available now days.
Each of the 6000 cells will have their own pci, but since there are only 504 physical cell ids. The pci is combination of two synchronization signals. Jun 24, 2019 in this video we are going to discuss about lte physical cell identity pci do like it, share and subscribe the channel if you havent yet. The cell search procedure and pci planning in tdlte. Motivation inappropriate pci planning, result in significant kpi degradation. Poor planning results in pci conflicts or collisions which impact network performance. Pdf analysis of the impact of pci planning on downlink. In lte networks, there are several properties that need to be carefully planned for. How the planning can be done with 6 enodeb cells or 3 enodeb cells is described in section 6.
Multibeam antennas planning limitations and solutions. Pci assigning problem formulation let us say that we are going to deploy an lte network in a city that needs 6000 cells. In lte, physical cell identifier pci planning has been identified as. A software product for planning multitechnology wireless networks across gsm, umts, lte, 5g and more, all within a single project. The physical cell identity is an essential configuration parameter of a radio cell in lte. The pci is combination of two synchronization signals 1. Page 2 lte cell search description pci cell search is the first procedure executed by an ue user equipment to connect to the lte. Pci compliant g te page 1 building pcicompliant applications with digi transport 4g lte routers this paper examines the elements of a payment network, explains the key concepts and terms. In lte networks, there are several properties that need to be carefully planned for the network to be well performing. Section 2 formulates the pci planning problem explaining how pci planning determines crs collisions. Physical cell identifier pci planning in lte has been identified as an im portant use case for. Sss secondary synchronization signals, pci group there are 504 different pci s in lte.
Pci planning and pcfich consideration in lte pcfich spans four 4 locations across the bandwidth and are equidistant. To detect pci correctly plays a crucial role in the cell search procedure, and it also affects the mobility of the user terminal. Page 2 lte cell search description pci cell search is the first procedure executed by an ue user equipment to connect to the lte network. To assign pci correctly and efficiently will increase resource utilization and qos of the lte system for subscribers. Pci planning strategies for long term evolution networks. The pci planning for 5g nr is very much similar to pci planning for lte and scrambling code planning for 3g umts. Acedohernandez and others published analysis of the impact of pci planning on downlink throughput performance in lte find, read and cite all the research you. Today, atoll offers a powerful platform for operators to plan and optimise lte a pro and 5g nr networks. Share what you know and love through presentations, infographics, documents and more. The structure of the 4g pci is based on the following equation. Asset radio is teocos marketleading radio planning tool. Lte pci planning and things to avoid when doing pci. The pci is combination of two synchronisation signals. Pci plan that does not consider pci grouping and does not follow any specific reuse pattern the first strategy option is recommended to use in order to avoid nonoptimal pci combinations for adjacent cells.
In long term evolution lte networks, physical cell identity allocation pci is crucial for quality of service and somewhat similar to scrambling code allocation in wcdma. Although several pci planning schemes have been proposed in the literature, no study has quantified the performance gains obtained by these schemes. The main objective of pci planning is to ensure that all cells are correctly identified. Conflicts result in handover issues, access issues, and reduced throughput. Pci planning is more important because if optimal pci is not assigned to enodeb the signals will overshoot and cause interference.
Physical cell identifiers pci to cells in a long term evolution lte system based. Both coveragelimited and interferencelimited scenarios are considered. As we are all aware, there are 504 pcis in lte that are used to plan the 4g network that i explained in my previous article, pci planning. The first step is cell search procedure for a user terminal in td lte. Lte pci planning and things to avoid when doing pci planning. Report lte pci planning guide please fill this form, we will try to. Each site is assigned a specific code group and each sector a specific color group random planning i. Analysis of the influence of pci planning on the physical. Pci and rsi planning audit, optimize, and plan lte settings for pci, rsi and cell range. Pcfich issues with pci planning now lets focus on pcfich issues while planning the pcis. Methodology for the physical cell identity assignment in. This page on lte pci calculator does psssss vs pci conversion. Lte mobile optimization a definitive guide white paper. This article first briefly introduces the pci parameter and the cell research procedure, and specifies the pci is the important parameter for lte, and then describes the planning principles of the parameter.
It identifies the cell in mobility functions such as cell reselection and handover. Analysis of the impact of pci planning on downlink. Start the year strong by taking note of when your annual pci compliance assessment will be due as well as ensuring that your monthly vulnerability. The lte pci calculator takes cell group number physical layer cell id group and cell number physical layer sub cell id as inputs.
The physical cell id pci is the identier of a network cell in the physical layer. As smartphone penetration increase all over the world, mobile. Maria, 2017, analysis of using pci on 4g lte planning for east balikpapan, politeknik negeri balikpapan. Pci planning is a required output for rf detailed design. Lte network planning calls for accurate pci and rsi configurations. Pdf pci planning based on binary quadratic programming in. Its a problem that is worth studying how to determine the pci planning in td lte. The goal of lte is to speed up the network and increase the capacity. In this paper simulation results, in order to optimize pci planning in lte networks is developed and several recommendations for pci planning strategies are presented. Information and communications technology report this link.
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