02.......0I Information

0000001.N(S) = 1

02.......0P

0000001.N(R) = 1

Layer 3 - Network Layer

08Protocol discriminator = Q.931

01....0001Call Reference Length = 1

010.......Flag = ORIGINATOR

.0000001Call Reference Value = 1

7B0.......E

.1111011Message type = INFORMATION

70Info Element = CALLED PARTY NUMBER

02Length = 2 octets

811.......EXT

.000....Type of number = Unknown

....0001Numbering plan = ISDN/telephony numbering plan

31. Number digits = 1

Вариант 4. CALL PROCEEDING

Layer 2 - Data Link Layer

Address field

02.......0EA0

......1.C/R = COMMAND

000000..SAPI = 0 Call control procedures

CB.......1EA1

1100101.TEI = 101 Automatic assignment

Control field

02.......0I Information

0000001.N(S) = 1

0C.......0P

0000110.N(R) = 6

Layer 3 - Network Layer

08Protocol discriminator = Q.931

01....0001Call Reference Length = 1

811.......Flag = DESTINATION

.0000001Call Reference Value = 1

020.......E

.0000010Message type = CALL PROCEEDING

Вариант 5. ALERTING

Layer 2 - Data Link Layer

Address field

02.......0EA0

......1.C/R = COMMAND

000000..SAPI = 0 Call control procedures

CB.......1EA1

1100101.TEI = 101 Automatic assignment

Control field

04.......0I Information

0000010.N(S) = 2

0C.......0P

0000110.N(R) = 6

Layer 3 - Network Layer

08Protocol discriminator = Q.931

01....0001Call Reference Length = 1

811.......Flag = DESTINATION

.0000001Call Reference Value = 1

010.......E

.0000001Message type = ALERTING

Вариант 6

******** LAPD128 (LAPD)

******** INFORMATION (I)

- - - - - --0 Address Field Extension Bit (EA) : 0

- - - - - -1- Command-Bit (C) : 1 = command from network to user

000000- - Service access point identifier (SAPI) : 0

-- - - - - -1 Address Field Extension Bit (EA) : 1

0000001- Terminal endpoint identifier (TEI) : 1

1010011 - Send Sequence Number (NS) : 83

- - - - - --0 Point Bit (P) : 0 = no response frame needed

1011001- Send Sequence Number (NS) : 89

******** GSM 08.58 – RSL (V 6.2.0) (GSM_0858)

- - - - - --0 Transparent Bit (T-BIT) : 0h

0000110- Message Discriminator (MD) : 6h = Common Management

Messages (CCM)

******** GSM 08.58 – CCM (V 6.2.0) (GSM0858_CCM)

******** IMMEDIATE ASSIGN COMMAND (IMME_ASS_CMD)

******** Channel Number (CHA_NO)

- - - - -000 Timeslot Number (TN) : 0

10010- - - Channel Type (CHA_TYPE) : 18 = Downlink CCCH (PCH+AGCH)

******** Full Immediate Assign Information (FULL_IMME_ASS_INFO)

********Layer 3 Information (L3_INFO) : 31 06 3F…………… 2B 2B 2Bh

Вариант 7

******** LAPD128 (LAPD)

******** INFORMATION (I)

- - - - - --0 Address Field Extension Bit (EA) : 0

- - - - - -0- Command-Bit (C) : 0 = command from network to user

000000- - Service access point identifier (SAPI) : 0

-- - - - - -1 Address Field Extension Bit (EA) : 1

0000001- Terminal endpoint identifier (TEI) : 1

1100111 - Send Sequence Number (NS) : 103

- - - - - --0 Point Bit (P) : 0 = no response frame needed

0001100- Send Sequence Number (NS) : 12

******** GSM 08.58 – RSL (V 6.2.0) (GSM_0858)

- - - - - --1 Transparent Bit (T-BIT) : 1h

0000001- Message Discriminator (MD) : 1h = Radio Link Layer

Management Messages (RLLM)

******** GSM 08.58 – RLLM (V 6.2.0) (GSM0858_RLLM)

******** DATA INDICATION (DIND)

******** Channel Number (CHA_NO)

- - - - -001 Timeslot Number (TN) : 1

01000- - - Channel Type(CHA_TYPE) : 8 = SDCCH/8 + ACCH; Subchannel=0

******** Link Identifier (LINK_ID)

- - - - -000 Service Access Point Identifier (SAPI) : 0h = SAPI 0 (0)

- -0- - - - - NA (NA) : 0h = applicable for this message

00- - - - - - Channel Type (CHA_TYPE) : 0h = main signaling channel FACCH

or SDCCH (FACCH/SDCCH)

******** Layer 3 Information (L3_INFO)

******** Data (DATA) : 05 5Bh

******** GSM 04.08 – DTAP (V 6.4.2) (GSM_0408)

********<General Fields> (GENERAL_FIELDS)

- - - -0101 Protocol Discriminator (PD) : 5h = Mobility Management (MM)

******** GSM 04.08 – MM (V 6.4.2) (GSM0408_MM)

******** TMSI REALLOCATION COMPLETE (TMSI REALLOC COMP)

Вариант 8

******** LAPD128 (LAPD)

******** INFORMATION (I)

- - - - - --0 Address Field Extension Bit (EA) : 0

- - - - - -0- Command-Bit (C) : 0 = command from network to user

000000- - Service access point identifier (SAPI) : 0

-- - - - - -1 Address Field Extension Bit (EA) : 1

0000001- Terminal endpoint identifier (TEI) : 1

1011000 - Send Sequence Number (NS) : 88

- - - - - --0 Point Bit (P) : 0 = no response frame needed

1010011- Send Sequence Number (NS) : 83

******** GSM 08.58 – RSL (V 6.2.0) (GSM_0858)

- - - - - --0 Transparent Bit (T-BIT) : 0h

0000100- Message Discriminator (MD) : 4h = Dedicated Channel

Management Messages (DCM)

******** GSM 08.58 – DCM (V 6.2.0) (GSM0858_DCM)

******** CHANNEL ACTIVATION ACKNOWLEDGE

(CHANNEL_ACTIVATE_ACK)

******** Channel Number (CHA_NO)

- - - - -001 Timeslot Number (TN) : 1

01000- - - Channel Type(CHA_TYPE) : 8 = SDCCH/8 + ACCH; Subchannel=0

******** Frame Number (FRAME_NO)

11000- - - T1 (T1) : 18h

******** T3 (T3) : 21h

- - -10001 T2 (T2) : 11h

Вариант 9

******** LAPD128 (LAPD)

******** INFORMATION (I)

- - - - - --0 Address Field Extension Bit (EA) : 0

- - - - - -1- Command-Bit (C) : 1 = command from network to user

000000- - Service access point identifier (SAPI) : 0

-- - - - - -1 Address Field Extension Bit (EA) : 1

0000001- Terminal endpoint identifier (TEI) : 1

1011011 - Send Sequence Number (NS) : 91

- - - - - --0 Point Bit (P) : 0 = no response frame needed

1011101- Send Sequence Number (NS) : 93

******** GSM 08.58 – RSL (V 6.2.0) (GSM_0858)

- - - - - --0 Transparent Bit (T-BIT) : 0h

0000100- Message Discriminator (MD) : 4h = Dedicated Channel

Management Messages (DCM)

******** GSM 08.58 – DCM (V 6.2.0) (GSM0858_DCM)

******** SACCH INFO MODIFY (SACCH_INFO_MODIFY)

******** Channel Number (CHA_NO)

- - - - -001 Timeslot Number (TN) : 1

01000- - - Channel Type(CHA_TYPE) : 8 = SDCCH/8 + ACCH; Subchannel=0

******** System Information Type (SYS_INFO_TYPE)

00000101 Type (TYPE) : 5h = SYSTEM INFORMATION 5 (5)

******** Layer 3 Information (L3_INFO)

******** Data (DATA) : 06 1D 00 18……………… 04 84 83h

Вариант 10

******** LAPD128 (LAPD)

******** INFORMATION (I)

- - - - - --0 Address Field Extension Bit (EA) : 0

- - - - - -0- Command-Bit (C) : 0 = command from network to user

000000- - Service access point identifier (SAPI) : 0

-- - - - - -1 Address Field Extension Bit (EA) : 1

0000001- Terminal endpoint identifier (TEI) : 1

1011100 - Send Sequence Number (NS) : 92

- - - - - --0 Point Bit (P) : 0 = no response frame needed

1011011- Send Sequence Number (NS) : 91

******** GSM 08.58 – RSL (V 6.2.0) (GSM_0858)

- - - - - --0 Transparent Bit (T-BIT) : 0h

0000001- Message Discriminator (MD) : 1h = Radio Link Layer

Management Messages (RLLM)

******** GSM 08.58 – RLLM (V 6.2.0) (GSM0858_RLLM)

******** ESTABLISH INDICATION (EIND)

******** Channel Number (CHA_NO)

- - - - -001 Timeslot Number (TN) : 1

01000- - - Channel Type(CHA_TYPE) : 8 = SDCCH/8 + ACCH; Subchannel=0

******** Link Identifier (LINK_ID)

- - - - -000 Service Access Point Identifier (SAPI) : 0h = SAPI 0 (0)

- -0- - - - - NA (NA) : 0h = applicable for this message

00- - - - - - Channel Type (CHA_TYPE) : 0h = main signaling channel FACCH

or SDCCH (FACCH/SDCCH)

******** Layer 3 Information (L3_INFO)

******** Data (DATA) : 06 27 02 03 33 58 81 08 29 05 21 04 03 10 18

Задание №2.Прикладной протокол ISUP. Функции протокола. Форматы сообщений. Типы сообщений. Параметры сообщений. Расшифровка трейса протокола ISUP.

Цель работы: Расшифровать трейс согласно формата 2 и 3 уровня сигнализации ISUP.