What is PCI collision in LTE?
What is PCI collision in LTE?
PCI confusions occur whenever an LTE cell has two different neighbor LTE cells with equal PCIs, in the same frequency band [4]. PCI collisions happen whenever an LTE cell has a neighbor LTE cell with identical PCI in the same frequency band [4]. A good PCI plan can be applied to avoid PCI conflicts.
What is PCI collision and confusion in LTE?
A PCI confusion occurs whenever a E-UTRAN cell has two different neighbor E-UTRAN cells with equal PCI and frequency. A PCI collision happens whenever a E-UTRAN cell has a neighbor E-UTRAN cell with identical PCI and frequency.
How many PCI are in a LTE system?
504
Physical Cell Identity(PCI) Moreover, the number of unique PCIs that been supported in macrocell is 504 due to the needs of compatibility with legacy base station.
How many PCI are in 5g NR?
1008 unique PCIs
5GNR supports 1008 unique PCIs .
What is mod3 LTE?
This means that for every PCI=X, any other PCI with value of X+3(n) – where “n” is an integer, will have a collision on Reference Signal between the two ports. This is known as the PCI mod3 issue.
How many PCI are in 5G NR?
What is difference between PCI and cell ID in LTE?
The physical cell ID (PCI) is used to indicate the physical layer identity of the cell. The PCI is used for cell identity during cell selection procedure. The purpose of PCI optimization is to ensure to a great extent that neighboring cells should have different primary sequences allocated.
What is the range of PCI?
Categorization
| PCI range | Class |
|---|---|
| 85-100 | Good |
| 70-85 | Satisfactory |
| 55-70 | Fair |
| 40-55 | Poor |
How do you calculate 5G PCI?
- Physical Layer Cell ID.
- Physical Cell ID (PCI) Calculation: For example a 5G-NR cell has SSS value as 303 and PSS value as 1 then Physical Cell ID will be. 3 x 303 + 1 = 909 + 1= 910.
- Related Post.
What is SSS in 5G?
5G-NR Secondary Synchronization Signal (SSS) is Physical Layer specific signal and help UE to get subframe boundary. It is similar to PSS, as it is also an m-Sequence.
How are PCI and RSI collision detection used in LTE?
The tested network problems are Physical Cell Identity (PCI) conflicts and Root Sequence Index (RSI) collisions and were labeled through configured cell relations that verified these two conflicts. Furthermore, a real LTE network was used.
Are there PCI conflicts in LTE radio networks?
The PCI conflict problem that can occur in LTE radio networks, and also it’s subcategories – confusions and collisions. Furthermore, the steps taken towards achieving the best approach to detect PCI conflicts, by using different models to analyse KPI daily measurements are presented.
How is PCI decoded in a LTE network?
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 text-books. As already explained, the PCI is decoded using the SSS and the PSS and can be given by the following equation. PCI = 3*SSS + PSS.
When does a PCI collision occur in a cell?
A PCI collision happens whenever a E-UTRAN cell has a neighbor E-UTRAN cell with identical PCI and frequency. A good PCI plan can be applied to avoid most PCI conflicts.