4G/LTE - BL/CE

 

 

 

Paging

 

Overall Paging mechanism for LTE BL/CE is similar to legacy LTE. So I strongly recommend you to read through the legacy LTE Paging first.

 

 

Paging Parameters in SIB2

 

    +-sib2 ::= SEQUENCE [00]

      +-ac-BarringInfo ::= SEQUENCE OPTIONAL:Omit

      +-radioResourceConfigCommon ::= SEQUENCE

      | +-rach-ConfigCommon ::= SEQUENCE

      | +-bcch-Config ::= SEQUENCE

      | +-pcch-Config ::= SEQUENCE

      | | +-defaultPagingCycle ::= ENUMERATED [rf64]

      | | +-nB ::= ENUMERATED [halfT]

      | +-prach-Config ::= SEQUENCE

      | +-pdsch-ConfigCommon ::= SEQUENCE

      | +-pusch-ConfigCommon ::= SEQUENCE

      | +-pucch-ConfigCommon ::= SEQUENCE

      | +-soundingRS-UL-ConfigCommon ::= CHOICE [release]

      | +-uplinkPowerControlCommon ::= SEQUENCE

      | +-ul-CyclicPrefixLength ::= ENUMERATED [len1]

      | +-EXTENSION ::= SEQUENCE [0001]

      |   +-VERSION-BRACKETS1 ::= SEQUENCE OPTIONAL:Omit

      |   +-VERSION-BRACKETS2 ::= SEQUENCE OPTIONAL:Omit

      |   +-VERSION-BRACKETS3 ::= SEQUENCE OPTIONAL:Omit

      |   +-VERSION-BRACKETS4 ::= SEQUENCE [1110111] OPTIONAL:Exist

      |     +-bcch-Config-v1310 ::= SEQUENCE OPTIONAL:Exist

      |     +-pcch-Config-v1310 ::= SEQUENCE [1] OPTIONAL:Exist

      |     | +-paging-narrowBands-r13 ::= INTEGER (1..maxAvailNarrowBands-r13[16]) [1]

      |     | +-mpdcch-NumRepetition-Paging-r13 ::= ENUMERATED [r1]

      |     | +-nB-v1310 ::= ENUMERATED [one64thT] OPTIONAL:Exist

      |     +-freqHoppingParameters-r13 ::= SEQUENCE [000000] OPTIONAL:Exist

      |     +-pdsch-ConfigCommon-v1310 ::= SEQUENCE OPTIONAL:Omit

      |     +-pusch-ConfigCommon-v1310 ::= SEQUENCE [000] OPTIONAL:Exist

      |     +-prach-ConfigCommon-v1310 ::= SEQUENCE [11] OPTIONAL:Exist

      |     +-pucch-ConfigCommon-v1310 ::= SEQUENCE [11100] OPTIONAL:Exist

     

 

  • defaultPagingCycle : rf32, rf64, rf128, rf256
  • nB : fourT, twoT, oneT, halfT, quarterT, oneEighthT, oneSixteenthT, oneThirtysecondT
  • mpdcch-NumRepetition-Paging-r13 : r1, r2, r4, r8, r16, r32, r64, r128, r256
  • nB-v1310 : one64thT, one128thT, one256thT

 

 

Paging Occasion(PO), Paging Frame (PF) and Paging Narrow Band(PNB)

 

 

  • Paging Occasion (PO) is a subframe where there may be P-RNTI transmitted on MPDCCH. When the P-RNTI PDCCH is transmitted repeatedly, PO refers to the starting subframe of MPDCCH repetitions
  • Paging Frame (PF) is one Radio Frame, which may contain one or multiple Paging Occasion(s). When DRX is used the UE needs only to monitor one PO per DRX cycle
  • Paging NarrowBand(PNB) is one narrowband, on which the UE performs the paging message reception

 

    PF : SFN mod T= (T div N)*(UE_ID mod N)

      , N = DRX Cycle / nB

      , nB = index indicating pcch-Config.nB and pcch-Config-v1310.nB-v1310 {0,1,2,3,4,5,6,7,8,9,10}  

     

     

    PO : i_s = floor(UE_ID/N) mod Ns

     

     

    PNB = floor(UE_ID/(N*Ns)) mod Nn

      , Nn = [SIB2] pcch-Config-v1310.paging-narrowBands-r13

     

    UE_ID = IMSI mod 16384

     

     

    IMSI = Integer value of IMSI String. IMSI string is the digit 0~9 in Decimal.

      Ex > IMSI = '0123456789' is 123456789 (Dec)

     

 

 

Reference :