Lots of challenges are related to constructing while making any new lte pci planning or wi-fi community, creating the long time Evolution (LTE) community comes with a bushel of its personal issues.This type of challenging situations is coping with neighbor cells. It’s a difficult challenge even for traditional cellular networks, and it becomes even tougher like new mobile technology rollout with 2G and 3G cells already exist. Those neighbor cells are firmly in the vicinity and no longer going everywhere. LTE ought to discover a manner to cope with the cells, properly, without making the community and consumer go through.
lte PCI planning and implimentation
- To assist deal with this, and to live in keeping with 3GPP specs, network operators are turning to automated Neighbour Relation (ANR) functionality. ANR relieves the burden of manually dealing with Neighbor members of the family (NR).
- Consistent with LteWorld, the ANR function lives in the eNB and manages the Neighbour Relation table (NRT). Inside this desk are many sides and branches that assist address those neighbor cells.
- The neighbor detection function is responsible for locating new neighbors and including them to the NRT. The Neighbour removal feature gets rid of NRs. Both the Neighbour Detection function and the Neighbour elimination characteristic are implementing silly accurate.
- It’s mean that ENB controlling the supply cellular knows The ECGI/CGI and bodily Cell Identifier (PCI) of the target cellular and has an entry inside the NRT for the deliver cellular figuring out the goal cell.
- “The ANR function is based on cells broadcasting their identity on the worldwide level, E-UTRAN cellular international Identifier (ECGI) and lets in O&M to control the NRT.
- O&M can upload and delete NRs. It could also trade the attributes of the NRT. The O&M device is knowledgeable approximately adjustments within the NRT.” in keeping with LteWorld, that is completed with Intra-LTE/frequency ANR and Inter-RAT/Inter-frequency ANR.
The eNB serving cellular with ANR feature, instructs each UE to perform measurements on neighbor cells, as part of the standard call method. The eNB may also use extraordinary regulations for teaching the UE to do measurements, and when to record them to the eNB.
While UE discovers new cells’ ECGI; the UE reports that detected ECGI to the serving cellular eNB. Further, the UE reviews the monitoring vicinity code and all PLMN IDs that have been detected. The eNB adds this neighbor relation to NRT.
- The eNB serving mobile, along with ANR feature can educate a UE to carry out measurements and detect cells on different RATs/frequencies, for the duration of the connection. Like with Intra-LTE/frequency ANR, the eNB can also use clear policies for teaching the UE to do measurements, and while to report them to the eNB.
- The eNB updates its inter-RAT/inter-frequency Neighbour Relation desk after receiving relevant info from UE. 
PCI making plans With regards to LTE PCI, adequate planning wishes to be accomplished. Harish Vadada lists main approach alternatives in his white paper LTE PCI planning.
- The primary method involves grouping neighboring sites into clusters and then assigning the one’s clusters a code group. Every site is assigned a selected code institution and each sector a particular color organization.
- The second method is random planning, that means that the PCI plan doesn’t recollect PCI grouping and does now not observe a specific or tailor-made reuse pattern.
- Telecom-cloud recommends the primary strategy, to be able to avoid non-greatest PCI combos for adjoining cells.
pci planning rules
While making plans PCI, engineers recommend the following guidelines:
1) The identical PCI should be prevented inside the equal website online and adjacent sites
2) PCIs with conflicting m0 and m1 values should be avoided in the equal website online and at adjoining websites
3)PCIs with conflicting okay values need to be averted in the identical site and adjoining stations
motives for now not strictly following those policies:
1) will no longer work in irregular mode
2) will purpose numerous regulations on neighbor and neighbor list, need to be shortened