3G/UMTS

 

 

 

 

NITZ (Network Information and Time Zone)

 

Network Name displayed on your mobile phone screen is determined by two different way as described below :

    Option 1: UE decode PLMN from Location Updating Accept or Attach Accept message and display the network name registered for the PLMN.

    Option 2 : Network explicitely notifies UE of Network Information by NAS message, MM:Information and/or GMM:Information as described in this page.

Whether to take Option 1 or Option 2 is up to Network Operator's implementation and the exact point of the NAS message if Option 2 is taken is also up to Network Operator's implementation. The protocol sequence for a registration for Option 2 is only an example. The exact sequence would vary depending on each network operator.

    1) MIB

    2) SIB

    3) RACH Preamble

    4) AICH

    5) RACH Message

    6) RRC: RRC Connection Request

    7) RRC: RRC Connection Setup

    8) RRC: RRC Connection Setup Complete

    9) RRC: initialDirectTransfer + MM: Location Updating Request

    10) RRC : downlinkDirectTransfer + MM:Authentication Request

    11) RRC: initialDirectTransfer + GMM: Attach Request

    12) RRC : uplinkDirectTransfer + MM:Authentication Response

    13) RRC : Security Mode Command

    14) RRC : Security Mode Complete

    15) RRC : downlinkDirectTransfer + MM:Identity Request

    16) RRC : uplinkDirectTransfer + MM:Identity Response

    17) RRC : downlinkDirectTransfer + MM:Location Updating Accept

    18) RRC : uplinkDirectTransfer + MM:TMSI Reallocation Complete

    19) RRC : downlinkDirectTransfer + MM:Information

    20) RRC : downlinkDirectTransfer + GMM: AuthenticationAndCipheringRequest

    21) RRC : uplinkDirectTransfer + GMM: AuthenticationAndCipheringResponse

    22) RRC : Security Mode Command

    23) RRC : Security Mode Complete

    24) RRC : downlinkDirectTransfer + GMM:Identity Request

    25) RRC : uplinkDirectTransfer + GMM:Identity Response

    26) RRC : downlinkDirectTransfer + GMM:Attach Accept

    27) RRC : uplinkDirectTransfer + GMM:Attach Complete

    28) RRC : downlinkDirectTransfer + GMM:Information

    29) RRC : RRC Connection Release

    30) RRC : RRC Connection Release Complete

 

19) RRC : downlinkDirectTransfer + MM:Information

 

DL-DCCH-Message

    integrityCheckInfo

        messageAuthenticationCode: 1e45b70e

        rrc-MessageSequenceNumber: 2

    message: downlinkDirectTransfer (5)

        downlinkDirectTransfer: r3 (0)

            r3

                downlinkDirectTransfer-r3

                    rrc-TransactionIdentifier: 1

                    cn-DomainIdentity: cs-domain (0)

                    nas-Message: 05324312834d228e76ab0523d376584e9fd2ebe4f41b4508...

                    GSM A-I/F DTAP - MM Information

                        Protocol Discriminator: Mobility Management messages

                            .... 0101 = Protocol discriminator: Mobility Management messages (0x05)

                            0000 .... = Skip Indicator: No indication of selected PLMN (0)

                        00.. .... = Sequence number: 0

                        ..11 0010 = DTAP Mobility Management Message Type: MM Information (0x32)

                        Network Name - Full Name

                            Element ID: 0x43

                            Length: 10

                            1... .... = Extension: No Extension

                            .000 .... = Coding Scheme: Cell Broadcast data coding scheme,

                                        GSM default alphabet, language unspecified, ....

                            .... 0... = Add CI: The MS should not add the letters

                                                for the Country's Initials to the text string

                            .... .011 = Number of spare bits in last octet:

                                        bits 6 to 8(inclusive) are spare and set to '0' in octet n

                            Text String: TestNetwork

                        Network Name - Short Name

                            Element ID: 0x45

                            Length: 4

                            1... .... = Extension: No Extension

                            .000 .... = Coding Scheme: Cell Broadcast data coding scheme,

                                            GSM default alphabet, language unspecified, ....

                            .... 0... = Add CI: The MS should not add the letters

                                                for the Country's Initials to the text string

                            .... .000 = Number of spare bits in last octet:

                                        this field carries no information about the number of spare bits ...

                            Text String: Test

                        Time Zone and Time - Universal Time and Local Time Zone

                            Element ID: 0x47

                            Year 14, Month 03, Day 25

                            Hour 04, Minutes 17, Seconds 09

                            Timezone: GMT - 5 hours 0 minutes

                        Daylight Saving Time

                            Element ID: 0x49

                            Length: 1

                            0000 00.. = Spare bit(s): 0

                            .... ..00 = No adjustment for Daylight Saving Time

 

 

28) RRC : downlinkDirectTransfer + GMM:Information

 

DL-DCCH-Message

    integrityCheckInfo

        messageAuthenticationCode: 1905f951

        rrc-MessageSequenceNumber: 6

    message: downlinkDirectTransfer (5)

        downlinkDirectTransfer: r3 (0)

            r3

                downlinkDirectTransfer-r3

                    rrc-TransactionIdentifier: 1

                    cn-DomainIdentity: ps-domain (1)

                    nas-Message: 08214312834d228e76ab0523d376584e9fd2ebe4f41b4508...

                    GSM A-I/F DTAP - GMM Information

                        Protocol Discriminator: GPRS mobility management messages

                            .... 1000 = Protocol discriminator: GPRS mobility management messages (0x08)

                            0000 .... = Skip Indicator: No indication of selected PLMN (0)

                        DTAP GPRS Mobility Management Message Type: GMM Information (0x21)

                        Network Name - Full Name

                            Element ID: 0x43

                            Length: 10

                            1... .... = Extension: No Extension

                            .000 .... = Coding Scheme: Cell Broadcast data coding scheme,

                                        GSM default alphabet, language unspecified, ....

                            .... 0... = Add CI: The MS should not add the letters

                                                for the Country's Initials to the text string

                            .... .011 = Number of spare bits in last octet:

                                        bits 6 to 8(inclusive) are spare and set to '0' in octet n

                            Text String: TestNetwork

                        Network Name - Short Name

                            Element ID: 0x45

                            Length: 4

                            1... .... = Extension: No Extension

                            .000 .... = Coding Scheme: Cell Broadcast data coding scheme,

                                        GSM default alphabet, language unspecified, ...

                            .... 0... = Add CI: The MS should not add the letters

                                        for the Country's Initials to the text string

                            .... .000 = Number of spare bits in last octet:

                                        this field carries no information about the number of spare bits ...

                            Text String: Test

                        Time Zone and Time

                            Element ID: 0x47

                            Year 14, Month 03, Day 25

                            Hour 04, Minutes 17, Seconds 10

                            Timezone: GMT - 5 hours 0 minutes

                        Daylight Saving Time

                            Element ID: 0x49

                            Length: 1

                            0000 00.. = Spare bit(s): 0

                            .... ..00 = No adjustment for Daylight Saving Time