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Glossary
Automatic Neighbor Relation (ANR) is a procedure for a cell to detect neighboring cells. A cell performs ANR by instructing UEs to detect and measure the cells around them and report back their results.
Further reading: https://www.sharetechnote.com/html/Handbook_LTE_ANR.html
Physical Cell ID is an identifier for LTE cells. The ID is designed to allow UEs differentiate between neighboring cells, minimize interference between them, and are assigned by network operators in a way to prevent collisions.
In LTE, the PCI is a 9 bit value from 0-503, and in 5G it's a 24 bit value from 0 to 1007.
Further reading:
Paging is the mechanism for a network to send data to a UE.
Further reading:
Random Access Channel is the first message from UE to eNB when you power it on.
Further reading:
The cellular radio access network (RAN) refers to the wireless portion of the network that connects the mobile phones to the core network through cells.
from [1]
Base stations are called eNodeB in LTE.
Radio Resource Control manages the connection between a phone and a base station (eNodeB) [1]
Non-Access Stratum manages the connection between a phone and the core network's MME. [1]
Mobile Management Entity manages mobility management and user authentication in 4G LTE [1].
International Mobile Subscriber Identity, connected w/ a user's SIM card
International Mobile Equipment Identity, correlated w/ a mobile device
Temporary Mobile Subscriber Identity, a more temporary type of IMSI generated by UEs
Cell Global Identity
Mobile Country Code
Mobile Network Code
System Information Blocks (SIB) are data sent by cells containing tons of different of information relevant to the UE. There's 13 types of SIBs in LTE, each with different purposes and payloads. They contain cell and administrative area identifiers, MCC and MNC, and radio channel info required for the phones to connect to the network [1].
Further reading:
- https://cafetele.com/system-information-block-lte/
- https://www.sharetechnote.com/html/Handbook_LTE_SIB.html
Signal to Interference plus Noise Ratio = (S / (N + I))
Reference Signal Received Power (RSRP)
Received Signal Strength Indicator (RSSI)
Reference Signal Received Quality
User Equipment (UE) refers to a mobile device, such as a smartphone, tablet, laptop, or other wireless device that's used to access the network (https://inseego.com/resources/5g-glossary/what-is-ue/). Uniquely identified with an IMSI and IMEI.