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2G/GSM |
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IPv4 Allocation
(1) Activate PDP Context Request
DLT: 147, Payload: gsm_a_dtap (GSM A-I/F DTAP) GSM A-I/F DTAP - Activate PDP Context Request Protocol Discriminator: GPRS session management messages .... 1010 = Protocol discriminator: GPRS session management messages (0x0a) 0... .... = TI flag: allocated by sender .000 .... = TIO: 0 01.. .... = Sequence number: 1 DTAP GPRS Session Management Message Type: Activate PDP Context Request (0x41) Network Service Access Point Identifier - Requested NSAPI NSAPI: 0x05 (5) LLC Service Access Point Identifier - Requested LLC SAPI 0000 .... = Spare bit(s): 0 .... 0011 = LLC SAPI: SAPI 3 (3) Quality Of Service - Requested QoS Length: 3 00.. .... = Spare bit(s): 0 ..00 0... = Quality of Service Delay class: Subscribed delay class (in MS to network direction) (0) .... .000 = Reliability class: Subscribed reliability class (in MS to network direction) (0) 0000 .... = Peak throughput: Subscribed peak throughput/reserved (0) .... 0... = Spare bit(s): 0 .... .000 = Precedence class: Subscribed precedence/reserved (0) 000. .... = Spare bit(s): 0 ...0 0000 = Mean throughput: Subscribed peak throughput/reserved (0) Packet Data Protocol Address - Requested PDP address Length: 2 0000 .... = Spare bit(s): 0 .... 0001 = PDP type organization: IETF allocated address (1) PDP type number: IPv4 address (33) Dynamic addressing Access Point Name Element ID: 0x28 Length: 4 APN: ims Protocol Configuration Options Element ID: 0x27 Length: 20 [Link direction: MS to network (0)] 1... .... = Extension: True Configuration Protocol: PPP for use with IP PDP type or IP PDN type (0) Protocol or Container ID: Internet Protocol Control Protocol (0x8021) Length: 0x10 (16) PPP IP Control Protocol Code: Configuration Request (1) Identifier: 0 (0x00) Length: 16 Options: (12 bytes), Primary DNS Server IP Address, Secondary DNS Server IP Address Primary DNS Server IP Address: 0.0.0.0 Type: Primary DNS Server IP Address (129) Length: 6 Primary DNS Address: 0.0.0.0 (0.0.0.0) Secondary DNS Server IP Address: 0.0.0.0 Type: Secondary DNS Server IP Address (131) Length: 6 Secondary DNS Address: 0.0.0.0 (0.0.0.0)
(2) Activate PDP Context Accept
DLT: 147, Payload: gsm_a_dtap (GSM A-I/F DTAP) GSM A-I/F DTAP - Activate PDP Context Accept Protocol Discriminator: GPRS session management messages .... 1010 = Protocol discriminator: GPRS session management messages (0x0a) 1... .... = TI flag: allocated by receiver .000 .... = TIO: 0 01.. .... = Sequence number: 1 DTAP GPRS Session Management Message Type: Activate PDP Context Accept (0x42) LLC Service Access Point Identifier - Negotiated LLC SAPI 0000 .... = Spare bit(s): 0 .... 0011 = LLC SAPI: SAPI 3 (3) Quality Of Service - Negotiated QoS Length: 3 00.. .... = Spare bit(s): 0 ..10 0... = Quality of Service Delay class: Delay class 4 (best effort) (4) .... .011 = Reliability class: Unacknowledged GTP/LLC, Ack RLC, Protected data (3) 0111 .... = Peak throughput: Up to 64 000 octet/s (7) .... 0... = Spare bit(s): 0 .... .001 = Precedence class: High priority (1) 000. .... = Spare bit(s): 0 ...1 1111 = Mean throughput: Best effort (31) Radio Priority Radio Priority (PDP or SMS): priority level 1 (highest) (1) Packet Data Protocol Address - PDP address Element ID: 0x2b Length: 6 0000 .... = Spare bit(s): 0 .... 0001 = PDP type organization: IETF allocated address (1) PDP type number: IPv4 address (33) IPv4 address: 192.168.1.1 (192.168.1.1) Protocol Configuration Options Element ID: 0x27 Length: 20 [Link direction: Network to MS (1)] 1... .... = Extension: True Configuration Protocol: PPP for use with IP PDP type or IP PDN type (0) Protocol or Container ID: Internet Protocol Control Protocol (0x8021) Length: 0x10 (16) PPP IP Control Protocol Code: Configuration Nak (3) Identifier: 0 (0x00) Length: 16 Options: (12 bytes), Primary DNS Server IP Address, Secondary DNS Server IP Address Primary DNS Server IP Address: 192.168.1.2 Type: Primary DNS Server IP Address (129) Length: 6 Primary DNS Address: 192.168.1.2 (192.168.1.2) Secondary DNS Server IP Address: 192.168.1.2 Type: Secondary DNS Server IP Address (131) Length: 6 Secondary DNS Address: 192.168.1.2 (192.168.1.2)
< Examples of Immdiate Assignment during IP traffic >
DLT: 147, Payload: gsm_a_ccch (GSM CCCH) GSM CCCH - Immediate Assignment L2 Pseudo Length 0010 11.. = L2 Pseudo Length value: 11 Protocol Discriminator: Radio Resources Management messages .... 0110 = Protocol discriminator: Radio Resources Management messages (0x06) 0000 .... = Skip Indicator: No indication of selected PLMN (0) Message Type: Immediate Assignment Page Mode .... 0000 = Page Mode: Normal paging (0) Dedicated mode or TBF 0011 .... = Dedicated mode or TBF: This message assigns a downlink TBF to the mobile station identified in the IA Rest Octets IE (3) Packet Channel Description 0000 1... = Spare bits (ignored by receiver) .... .011 = Timeslot: 3 001. .... = Training Sequence: 1 ...0 .... = Hopping channel: No .... 00.. = Spare Single channel : ARFCN 10 Request Reference Random Access Information (RA): 108 0000 0... = T1': 0 .... .000 000. .... = T3: 0 ...0 0000 = T2: 0 [RFN: 0] Timing Advance Timing advance value: 0 Mobile Allocation Length: 0 IA Rest Octets H... ....: First Discriminator Bit: High .H.. ....: Second Discriminator Bit: High ..0. ....: Discriminator Bit: Packet Assignment ...1 ....: Discriminator Bit: Packet Downlink Assignment Packet Downlink Assignment .... 1100 0000 0000 0000 0000 0000 1000 0000 .... = TLLI: 0xc0000080 .... 1...: TFI Assignment (etc): Present .... .000 00.. .... = TFI_Assignment: 0 ..0. .... = RLC_Mode: RLC acknowledged mode ...1 ....: Alpha: Present .... 0000 = Alpha: 0.0 (0) 0011 0... = Gamma: 12 dB (6) .... .1.. = Polling: MS shall send a PACKET CONTROL ACKNOWLEDGEMENT message in the uplink block specified by TBF Starting Time, on the assigned PDCH .... ..1. = TA_Valid: the timing advance value is valid .... ...0: Timing Advance Index: Not Present 1... ....: TBF Starting Time: Present .100 11.. = T1' (TBF): 19 .... ..10 0101 .... = T3 (TBF): 37 .... 0110 1... .... = T2 (TBF): 13 [TBF_Starting_Time: 26455] .0.. ....: P0: Not Present ..L. ....: Additions in R99: Not Present ...L ....: Additions in Rel-6: Not Present Padding Bits: default padding
DLT: 147, Payload: gsm_a_ccch (GSM CCCH) GSM CCCH - Immediate Assignment L2 Pseudo Length 0010 11.. = L2 Pseudo Length value: 11 Protocol Discriminator: Radio Resources Management messages .... 0110 = Protocol discriminator: Radio Resources Management messages (0x06) 0000 .... = Skip Indicator: No indication of selected PLMN (0) Message Type: Immediate Assignment Page Mode .... 0000 = Page Mode: Normal paging (0) Dedicated mode or TBF 0001 .... = Dedicated mode or TBF: This message assigns an uplink TBF or is the second message of two in a two-message assignment of an uplink or downlink TBF (1) Packet Channel Description 0000 1... = Spare bits (ignored by receiver) .... .011 = Timeslot: 3 001. .... = Training Sequence: 1 ...0 .... = Hopping channel: No .... 00.. = Spare Single channel : ARFCN 10 Request Reference Random Access Information (RA): 122 1010 0... = T1': 20 .... .001 000. .... = T3: 8 ...0 0000 = T2: 0 [RFN: 26936] Timing Advance Timing advance value: 0 Mobile Allocation Length: 0 IA Rest Octets H... ....: First Discriminator Bit: High .H.. ....: Second Discriminator Bit: High ..0. ....: Discriminator Bit: Packet Assignment ...0 ....: Discriminator Bit: Packet Uplink Assignment Packet Uplink Assignment .... 1...: Packet Uplink Assignment: Normal .... .000 00.. .... = TFI_Assignment: 0 ..0. .... = Polling: no action is required from MS ...0 ....: Allocation Type: Dynamic Allocation (mandatory after Rel-4) .... 000. = USF: 0 .... ...0 = USF_granularity: the mobile station shall transmit one RLC/MAC block 0... ....: P0: Not Present .10. .... = Channel_Coding_Command: CS-3 (2) ...1 .... = TLLI_Block_Channel_Coding: mobile station shall use coding scheme as specified by the corresponding CHANNEL CODING COMMAND or EGPRS CHANNEL CODING COMMAND field .... 1...: Alpha: Present .... .000 0... .... = Alpha: 0.0 (0) .001 10.. = Gamma: 12 dB (6) .... ..0.: Timing Advance Index: Not Present .... ...0: TBF Starting Time: Not Present L... ....: Additions in R99: Not Present .L.. ....: Additions in Rel-6: Not Present Padding Bits: default padding
< Examples of MAC Control message during Data Traffic >
DLT: 147, Payload: gsm_rlcmac_ul (Radio Link Control, Medium Access Control, 3GPP TS44.060) GSM RLC/MAC: PACKET_CONTROL_ACKNOWLEDGEMENT (1) (Uplink) 01.. .... = Payload Type (UL): RLC/MAC block contains an RLC/MAC control block that does not include the optional octets of the RLC/MAC control header (1) ..00 000. = spare: 0 .... ...0 = R: MS sent channel request message once 0000 01.. = MESSAGE_TYPE (UL): PACKET_CONTROL_ACKNOWLEDGEMENT (1) .... ..11 0000 0000 0000 0000 0000 0010 0000 00.. = TLLI: 3221225600 .... ..11 = CTRL_ACK: 3 0... .... Exist_AdditionsR5 Padding Bits .010 1011 0010 1011 0010 1011 0010 1011 Padding 0010 1011 0010 1011 0010 1011 0010 1011 Padding 0010 1011 0010 1011 0010 1011 0010 1011 Padding 0010 1011 0010 1011 0010 1011 0010 1011 Padding 0010 1011 Padding
DLT: 147, Payload: gsm_rlcmac_ul (Radio Link Control, Medium Access Control, 3GPP TS44.060) GSM RLC/MAC: PACKET_DOWNLINK_ACK_NACK (2) (Uplink) 01.. .... = Payload Type (UL): RLC/MAC block contains an RLC/MAC control block that does not include the optional octets of the RLC/MAC control header (1) ..00 000. = spare: 0 .... ...0 = R: MS sent channel request message once 0000 10.. = MESSAGE_TYPE (UL): PACKET_DOWNLINK_ACK_NACK (2) .... ..00 000. .... = DL TFI: 0 Ack_Nack_Description ...1 .... = FINAL_ACK_INDICATION: True .... 0000 010. .... = STARTING_SEQUENCE_NUMBER: 2 ...0 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 011. .... RECEIVED_BLOCK_BITMAP ...1 .... Exist_Channel_Request_Description Channel_Request_Description .... 0111 = PEAK_THROUGHPUT_CLASS: 7 00.. .... = RADIO_PRIORITY: 0 ..0. .... = RLC_MODE: RLC acknowledged mode ...1 .... = LLC_PDU_TYPE: True .... 0000 0000 0000 1011 .... = RLC_OCTET_COUNT: 11 Channel_Quality_Report .... 1111 11.. .... = C_VALUE: 63 ..00 0... = RXQUAL: 0 .... .000 000. .... = SIGN_VAR: 0 ...0 .... Slot[0].Exist .... 0... Slot[1].Exist .... .0.. Slot[2].Exist .... ..1. Slot[3].Exist .... ...0 001. .... = Slot[3].I_LEVEL_TN: 1 ...1 .... Slot[4].Exist .... 0001 = Slot[4].I_LEVEL_TN: 1 1... .... Slot[5].Exist .111 0... = Slot[5].I_LEVEL_TN: 14 .... .1.. Slot[6].Exist .... ..11 11.. .... = Slot[6].I_LEVEL_TN: 15 ..0. .... Slot[7].Exist ...0 .... Exist_AdditionsR99 Padding Bits .... 1011 0010 1011 0010 1011 0010 1011 Padding
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