1.

What is the value of SI modification period in LTE?

Answer»

Modification period (expressed in NUMBER of RADIO FRAMES) = modificationPeriodCoeff * defaultPagingCycle,

where (these parameters are signalled in BCCH-Config and PCCH-Config in SIB2)

- modificationPeriodCoeff can be configured to 2,4,8,or 16

- defaultPagingCycle can be configured to rf32, rf64, rf128, or rf256.

Therefore, the shortest POSSIBLE modification period is 2 * 32 = 64 radio frames = 640 ms, whereas the longest possible modification period is 16 * 256 = 4096 radio frames = 40,96 s.

Ref: 3GPP TS 36.331


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