Location Area Identity (LAI) and Global Cell Identity (GCI) in CDMA
Location Area Identity (LAI)
PAGING message is broadcast within a local area, the size of which depends on traffic, paging bearer capability, signaling flow , etc.
MCC: Mobile Country Code, 3 digits.
MNC: Mobile Network Code, 2 digits.
LAC: Location Area Code, a 2-byte-long hexadecimal BCD code. 0000 cannot be used with FFFE.
Global Cell Identity (GCI)
The unique ID of a cell in PLMN
CI: Cell Identity, a 2-byte-long hexadecimal BCD code, pre defined by the engineering department. The first 3 digits and the last digit represent the base station number and the sector number respectively. For an omni-directional site, the last digit of CI is 0.
For example, 4600301001230 shows base station number 123 contains an omni-directional site.