U – S

Message/PDU/SDU

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EXCEPTION: Steps 1a1 to 1c2 describe behaviour that depends on the UE implementation; the "lower case letter" identifies a step sequence that take place depending on the UE implementation.

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–

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1a1

IF (pc_IP_Ping = TRUE AND pc_IPv4 = TRUE) THEN, the SS sends an ICMP Echo request to the IPv4 address assigned to the UE on DRB#n.

<–

ICMP ECHO REQUEST (NOTE 3)

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–

1a2

Check: Does the UE send an ICMP Echo reply on DRB#n?

–>

ICMP ECHO REPLY

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P

1b1

ELSE IF (pc_IP_Ping = TRUE AND (pc_IPv4 = FALSE AND pc_IPv6 = TRUE)) THEN, the SS sends an ICMPv6 Echo request to the IPv6 address assigned to the UE on DRB#n.

<–

ICMPv6 ECHO REQUEST (NOTE 3)

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1b2

Check: Does the UE send an ICMPv6 Echo reply on DRB#n?

–>

ICMPv6 ECHO REPLY

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P

1c1

ELSE, the SS transmits one IP Packet to verify data path on DRB#n.

See NOTE 1, 2.

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1c2

Check: Does UE send the IP Packet on DRB#n in the uplink?

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P

NOTE 1: A Test Loop is assumed to already have been closed.

NOTE 2: When DRB#n is a dedicated bearer, the IP Packet shall match the packet filters as configured for DRB#n.
When DRB#n is a default bearer, the IP Packet shall match none of the dedicated bearers associated to DRB#n (if any). (NOTE 4)

NOTE 3: When DRB#n is a dedicated bearer, the source address of the ICMP/ICMPv6 ECHO REQUEST shall be the same as the remote address of the DL/UL packet filters.
When DRB#n is a default bearer, the source address of the ICMP/ICMPv6 ECHO REQUEST shall be different than the remote address of the DL/UL packet filters for an associated dedicated bearer (if any). (NOTE 4)

NOTE 4: For 5GC QoS rules and the associated packet filters are specified in clause 4.8.2.
For EPC the TFTs and associated packet filters are specified in clause 6.6.2 of TS 36.508 [2] and the IP packet shall be as according to clause 7.14.2 of TS 36.523-3 [41].

U – S

Message/PDU/SDU

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EXCEPTION: Step 1 is only performed if SCell is not yet activated.

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1

The SS transmits an Activation MAC control element to activate Scell.

<–

MAC PDU (Activation (C₁=1))

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EXCEPTION: Steps 2a1 to 2c2 describe behaviour that depends on the UE implementation; the "lower case letter" identifies a step sequence that take place depending on the UE implementation.

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–

–

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2a1

IF (pc_IP_Ping = TRUE AND pc_IPv4 = TRUE) THEN, the SS sends an ICMP Echo request to the IPv4 address assigned to the UE on DRB#n on the SCell.

<–

ICMP ECHO REQUEST (NOTE 3)

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–

2a2

Check: Does the UE send an ICMP Echo reply on DRB#n on the SpCell?

–>

ICMP ECHO REPLY

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P

2b1

ELSE IF (pc_IP_Ping = TRUE AND (pc_IPv4 = FALSE AND pc_IPv6 = TRUE)) THEN, the SS sends an ICMPv6 Echo request to the IPv6 address assigned to the UE on DRB#n on the SCell.

<–

ICMPv6 ECHO REQUEST (NOTE 3)

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–

2b2

Check: Does the UE send an ICMPv6 Echo reply on DRB#n on the SpCell?

–>

ICMPv6 ECHO REPLY

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P

2c1

ELSE, the SS transmits one IP Packet to verify data path on DRB#n on the SCell.

See NOTE 1, 2.

–

–

–

–

2c2

Check: Does UE send the IP Packet on DRB#n in the uplink on the SpCell?

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–

–

P

NOTE 1: A Test Loop is assumed to already have been closed.

NOTE 2: When DRB#n is a dedicated bearer, the IP Packet shall match the packet filters as configured for DRB#n.
When DRB#n is a default bearer, the IP Packet shall match none of the dedicated bearers associated to DRB#n (if any). (NOTE 4)

NOTE 3: When DRB#n is a dedicated bearer, the source address of the ICMP/ICMPv6 ECHO REQUEST shall be the same as the remote address of the DL/UL packet filters.
When DRB#n is a default bearer, the source address of the ICMP/ICMPv6 ECHO REQUEST shall be different than the remote address of the DL/UL packet filters for an associated dedicated bearer (if any). (NOTE 4)

NOTE 4: For 5GC QoS rules and the associated packet filters are specified in clause 4.8.2.
For EPC the TFTs and associated packet filters are specified in clause 6.6.2 of TS 36.508 [2] and the IP packet shall be as according to clause 7.14.2 of TS 36.523-3 [41].