S11/S5 Measurements

The values on the S11 and S5 tab report the bearer and user plane processing measurements in a SGW Nodal Test Case. Values on S11 tab apply when Serving Node is MME and values on S5 tab apply when the Serving Node is SGSN.

During MME Nodal Testing, S11, S10, S10 and S11 tabs reports the bearer and user plane processing measurements depending on your test selections:

In MME Nodal test case, when Test Activity is Inter-MME with SGW Emulation and when you select SGW/PGW Node Emulation and/or S10 Interface to MME, the following shows the names of the tabs and the measurements reported. (The S10 interface option is available only when Test Activity is Inter-MME).

Options on MME Nodal Test Configuration (test Activity is Inter-MME)	Tab name and processing measurements
Selected: SGW/PGW Node Emulation	SGW S11 measurements tab displays LTE GTP Bearer measurements (no Forward measurements)
Selected: SGW/PGW Node Emulation PGW and S10 Interface to MME	MME S10 & S11 measurements tab displays LTE GTP Bearer and Forward measurements. (MME Node has Node and IP Instance measurements.)
Not Selected: SGW/PGW Node Emulation Selected: S10 Interface to MME	MME S10 & S11 measurements tab displays LTE GTP Bearer and Forward measurements. (MME Node has Node and IP Instance measurements.)

SGW S11 tab is available when Test Activity is Inter-Technology Mobility and you have selected Gn Interface to MME and SGW/PGW Node Emulation on the MME Nodal Test Configuration tab.
S10 tab is available when Test Activity is Inter-MME and you have selected S10 Interface to MME on the MME Nodal Test Configuration tab.
MME S10 & S11 tab is available when Test Activity is Inter-MME and you have selected S10 Interface to MME and SGW/PGW Node Emulation on the MME Nodal Test Configuration tab.

Measurement Values

In the default view, the Reports tab displays the Summary view, which summarizes the measurements for the test session. If your test includes multiple test cases, you can view the report for a single test case by changing the report view...

Unless otherwise noted, cumulative values report the number of occurrences or rates calculated since the start of the test, and per-interval values report the number of occurrences or rates calculated during the interval. You can view either by changing the measurement values...

Learn more about test reports

Elapsed Time is the first measurement on every tab. It reports the amount of time between the start of the test and the end of the report interval.

Test Iteration reports the current iteration in a repeating test session. It is only displayed when a Number of Iterations is defined for the test session.

Message Counters

The following measurements record the number and types of messages exchanged during PDP context establishment, modification, and deactivation.

Attempts — The number of initial bearer sessions attempted. Although this value is the sum of Successes and Failures, the equation may not hold true at any given time during session processing since some sessions may be in a transient state when the measurements are collected.
Successes — The number of S11/S5 sessions that were successfully established.
Timeout — The number of bearer session establishment request messages sent without receiving a response.
Rejects — The number of bearer session Reject messages received, indicating that the attach was rejected due to an error.
Failures — The number of S11/S5 sessions that failed due to one of the errors listed below.
Create Session Requests Sent — The number requests sent to create of S11/S5 sessions.
Create Session Requests Rcvd — The number requests received to create of S11/S5 sessions.
Create Dedicated Requests — The number requests sent to create dedicated bearer procedure.
Create Dedicated Requests Rcvd — The number requests received to create dedicated bearer procedure.
Create Session Responses Sent — The number responses sent to create session requests.
Create Session Responses Rcvd — The number responses received to create session requests.
Create Dedicated Responses Sent — The number responses sent to create dedicated bearer procedure.
Create Dedicated Responses Rcvd — The number responses received to create dedicated bearer procedure.
Create Request Timeouts — The number of times a Create Request was sent without receiving a response from the Bearer.
Modify Bearer Requests Sent— The number of times a Modify Bearer context procedure request was sent.
Modify Bearer Requests Rcvd — The number of times a Modify Bearer context procedure request was received.
Modify Bearer Responses Sent — The number of times a Modify Bearer context procedure response was sent.
Modify Bearer Responses Rcvd — The number of times a Modify Bearer context procedure request was received.
Modify Bearer Request Timeouts — The number of times a Modify Bearer Request was sent without receiving a response.
Update Bearer Requests Rcvd — The number of times a Update Bearer context procedure request was received.
Update Bearer Responses Sent — The number of times a Update Bearer context procedure response was sent.
Update Bearer Responses Rcvd — The number of times a Update Bearer context procedure request was received.
Update Bearer Request Timeouts — The number of times a Update Bearer Request was sent without receiving a response.

Modify Access Bearers Req Sent — The number of Modify Access Bearers Requests sent from the MME to SGW.

An MME sends a Modify Access Bearer Request message to an SGW as part of the UE triggered Service Request (if there is no suspended bearer for that UE).

Modify Access Bearers Req Rcvd — The number of Modify Access Bearers Requests received by the SGW from MME.
Modify Access Bearers Rsp Sent — The number of Modify Access Bearers Response sent from the SGW to MME.

The SGW sends a Modify Access Bearers Response message to an MME as a response to a Modify Access Bearers Request message.

Modify Access Bearers Rsp Rcvd — The number of Modify Access Bearers Response received by the MME from SGW.
Modify Access Bearers Req Timeouts — This defines the number of Timeouts waiting for response from the SGW.
- Release Access Bearers Req Sent — The number of Release Access Bearers Requests sent from the MME to SGW. In MME sends a Modify Access Bearer Request message to an SGW as part of the UE triggered Service Request (if there is no suspended bearer for that UE)
- Release Access Bearers Req Sent w/ARRL — The number of Release Access Bearers Requests sent from the MME to SGW with Abnormal Release of Radio Link (ARRL).
- Release Access Bearers Req Rcvd — The number of Release Access Bearers Requests received by the SGW from MME.
- Release Access Bearers Req Rcvd w/ARRL — The number of Release Access Bearers Requests received by the SGW from MME with Abnormal Release of Radio Link (ARRL). .
- Release Access Bearers Rsp Sent — The number of Release Access Bearers Response sent from the SGW to MME. The SGW sends a Modify Access Bearers Response message to an MME as a response to a Modify Access Bearers Request message.
- Release Access Bearers Rsp Rcvd — The number of Release Access Bearers Response received by the MME from SGW.
- Release Access Bearers Req Timeouts — This defines the number of Timeouts waiting for response from the SGW.
- Bearer Resource Commands Sent — The number of Bearer Resource Commands sent.
- Bearer Resource Commands Rcvd — The number of Bearer Resource Commands received.
- Bearer Uplink Data Packets Sent — The number of Uplink bearer plane data packets sent.
- Bearer Downlink Data Packets Rcvd — The number of Downlink link bearer plane data packets received.
- End Marker Packet Rcvd — The number of times a packet set with End Marker was received (to assist in eNodeB reordering function)

Bearer Uplink Data Octets Sent — The number of Uplink bearer data Octets sent.
Bearer Downlink Data Octets Rcvd— The number of Downlink link bearer plane data Octets received.
Delete Bearer Requests Sent — The number of times a delete bearer request was sent.
Delete Bearer Requests Rcvd — The number of times a delete bearer request was received.
Delete Bearer Responses Sent — The number of times a response was sent to a delete bearer request.
Delete Bearer Responses Rcvd — The number of times a response was received to a delete bearer request.
Update User Plane Requests Sent — The number times the user plane Update Requests was sent by the MME/SGSN.
Update User Plane Requests Rcvd — The number times the user plane Update Requests was received by the MME/SGSN.
Update User Plane Responses Sent — The number times the user plane Update Response was sent by the MME/SGSN.
Update User Plane Responses Rcvd — The number times the user plane Update Response was received by the MME/SGSN.
Update Request Timeouts — The number of times a Update Request was sent without receiving a response from the MME/SGSN.
Delete Session Attempts — The number of initial bearer sessions attempts delete messages.
Delete Session Failures — The number of S11/S5 sessions failures delete messages.
Delete Session Successes — The number of S11/S5 sessions successes delete messages.
Delete Session Requests Sent — The number times a session Delete Request was sent.
Delete Session Requests Rcvd — The number times a session Delete Request was received.
Delete Session Responses Rcvd — The number times a session Delete Response was received.
Delete Session Responses Sent — The number times a session Delete Response was sent.
Delete Request Timeouts — The number of times a Delete Request was sent without receiving a response.
Handoff Attempts — The number times a session Handoff was attempted.
Handoff Successes — The number times a session Handoff was successful.
Unrecognized Padding Bytes — The number of invalid padding bytes received in and stripped from tunnelling (GTP-C/GTP-U) messages.
Error Indications Received — This defines the number of Error Indications received from the MME/SGSN
Error Indications Sent — This defines the number of Error Indications Sent to the MME/SGSN
Poorly Formed Rcvd — This defines the number of poorly formed messages received from the MME/SGSN
Poorly Formed— This defines the total number of poorly formed messages
Non-Existent — The number times the Bearer Non-Existent message was received from the MME/SGSN
IMSI Unknown — The number times the Bearer Unknown IMSI message was received from the MME/SGSN
No Resources — The number times the Bearer Non-Existent message was received from the MME/SGSN
Service Not Supported — The number times the Bearer Not Supported message was received from the MME/SGSN
System Failure — The number times the System Failure messages was received from the MME/SGSN
User Authentication Failure- The total number of User Authentication Failure messages
Context Not Found- The total number of Context Not Found messages
All Dynamic Addresses Occupied - - The total number of All Dynamic Address Occupied Error messages
No Memory Available - The total number of No Memory Available messages
Missing/Unknown APN - The total number of Missing/Unknown APN messages
Unknown Bearer Address Type - The total number of Unknown Bearer AddressType messages
Traffic Flow Template Error - The total number of Traffic Flow Template Error messages
APN Access Denied Error - The total number of APN Access Denied Error messages
APN Restriction Type Error - The total number of APN Restriction Type Error messages
Connect Count — The number of sessions that were connected. Only supported in S11 / S4 interfaces.
Average Connect Time — The average time, in microseconds, required to establish a S11/S5 session. (The time between when a Create Session Request is sent and a Create Session Response is received.)
Min Connect Time — The minimum time, in microseconds, required to establish a S11/S5 session.
Max Connect Time — The maximum time, in microseconds, required to establish a S11/S5 session.
Disconnect Count — The number of sessions that were disconnected. Only supported in S11 / S4 interfaces.
Average Disconnect Time — The average time, in microseconds, required to tear down a S11/S5 session. (The time between when a Disconnect Session Request is sent and a Disconnect Session Response is received.)
Max Disconnect Time — The maximum time, in microseconds, required to disconnect a S11/S5 session.
Min Disconnect Time — The minimum time, in microseconds, required to disconnect a S11/S5 session.
Suspend Notifications — The total number of Suspend Notifications.
Suspend Notification Acks — The total number of Suspend Notification Acks.
Suspend Notification Timeouts — The total number of Suspend Notification Timeouts.
Resume Notifications — The total number of Resume Notifications.
Resume Notification Acks — The total number of Resume Notification Acks.
Resume Notification Timeouts — The total number of Resume Notification Timeouts.
IPv6 Router Advertisements — The total number of IPv6 Router Advertisements.
IPv6 Router Solicitations — The total number of IPv6 Router Solicitations.
Multiple PDN Connections for an APN Not Allowed — The total number of Multiple PDN Connections for an APN Not Allowed.
Remote UE Report Notification Sent — The number of Remote UE Report Notification messages sent. A remote UE Report is newly connected or disconnected.
Remote UE Report Notification Received — The number of Remote UE Report Notification messages received.
Remote UE Report Ack Sent — The number of Remote UE Report Ack messages sent. The response to Remote UE Report Notification message.
Remote UE Report Ack Received — The number of Remote UE Report Ack messages received.
UE Registration Query Request Sent — The number of UE Registration Query Request messages sent. A remote UE registration from SGSN to MME.
UE Registration Query Request Received — The number of UE Registration Query Request messages received.
UE Registration Query Response Sent — The number of UE Registration Query Response messages sent. The response to UE Registration Query Request message.
UE Registration Query Response Received — The number of UE Registration Query Response messages received.
Bearer Secondary RAT Usage UL Octets — The number of Bearer secondary RAT Usage UL (uplink) Octets.
Bearer Secondary RAT Usage DL Octets — The number of Bearer secondary RAT Usage DL (downlink) Octets.
Bearer LTE Usage UL Octets — Indicates Bearer LTE usage UL (Uplink) Octets.
Bearer LTE Usage DL Octets — Indicates Bearer LTE usage DL (Downlink) Octets.
Change Notification Request Sent — The number of change notification request messages sent.
Change Notification Response Received — The number of change notification response messages received.
Change Notification Request Received — The number of change notification request messages received.
Change Notification Response Sent — The number of change notification response messages sent.
APN Congestion — The number of Create Session Response messages with Cause = APN Congestion.

NOTE: The Average Connect/Disconnect OMs on the S11/S5 tab are calculated based on how long it takes to establish the session. That is, the time between when a Create/Disconnect Session Request is sent and a Create/Disconnect Session Response is received. The time needed to bring up/down the bearers is not included in the S11/S5 Average Connect/Disconnect measurements. Hence, the OMs on the Test Summary tab are different than the OMs on the S11/S5 tab.

The Following Values on S11 tab apply when Serving Node is MME

Forward Relocation Requests Sent — The number of Forward Relocation requests sent to the MME from SGSN during relocation handoffs.
Forward Relocation Requests Received — The number of Forward Relocation requests received by the MME during relocation handoffs.
Forward Relocation Requests Timeouts — The number of Forward Relocation requests was attempted without receiving a response.
Forward Relocation Response Sent — The number of Forward Relocation response sent from the MME after executing handoffs.
Forward Relocation Response Received — The number of Forward Relocation response received by the MME.
Forward Relocation Completes Sent — The number of Forward Relocation complete message sent from the MME after successful handoffs.
Forward Relocation Completes Received — The number of Forward Relocation complete message received from the MME after successful handoffs.
Forward Relocation Complete Timeouts — The number of Forward Relocation completes messages was attempted without receiving a response.
Forward Relocation Ack Received — The number of Forward Relocation acknowledge messages received from the MME after successful handoffs.
Forward relocation Ack Sent — The number of Forward Relocation acknowledge messages sent by the MME after successful handoffs.
Forward Context Requests Sent — The number of Forward Contexts requests sent to the MME from SGSN.
Forward Context Requests Received — The number of Forward Contexts requests received by the MME from SGSN.
Forward Context Responses Sent — The number of Forward Contexts response sent from the MME.
Forward Context Responses Received — The number of Forward Context responses received by the MME.
Forward Context Request Timeouts — The number of Forward Context request messages was attempted without receiving a response.
Forward Context Acks Sent — The number of Forward Context acknowledge messages sent by the MME.
Identification Request Sent — The number of Identification requests sent to the MME from SGSN.
Identification Request Received — The number of Identification requests received by the MME from SGSN.
Identification Response Sent — The number of Identification response sent from the MME.
Identification Response Received — The number of Identification responses received by the MME.
Identification Request Timeouts — The number of Identification request messages was attempted without receiving a response.