The IuPS tab is used to define the radio and transport layers of the Iu-PS interface between the RNC and a 3G-SGSN SUT. The settings for the appropriate protocols are displayed based on your Protocol selection.
When you select the Mobility or Session Loading With Mobility test activity, a Mobility IuPS tab is added to the test case to define the interface for the handoff RNC.
The Q.2931 Signaling ATM Adaptation Layer settings allow you to configure the various SSCOP timers that monitor the state of the RNC link.
Measurements collected for IuPS radio and transport related processing are reported on the M3UA, MTP-3B, RANAP, and SCCP report tabs.
The maximum window size for the RNC links. This value is used as an input to calculate the window size parameter that is transmitted in the SSCOP N(MR) field.
Range: 1 — 4096
Default: 256
Tcl Parameter: QsaalRcvWindow_1
The number of times a PDU will be re-transmitted after the Connection Control Timer expires.
Range: 1 — 10
Default: 5
Tcl Parameter: QsaalRspTmr_1
When a link is in the active phase, the Poll timer ensures that the RNC and SGSN are exchanging POLL and STAT PDUs often enough to allow each side to determine the peer's status. The timer is reset when a POLL is received and if it expires, the RNC will send a POLL to the SGSN.
Range: 1 — 60000
Default: 100
Tcl Parameter: QsaalPollTmr_1
The No-Response timer tracks the maximum number of milliseconds that can pass without the receipt of at least one STAT PDU. The timer is reset when a STAT is received and if it expires, the connection is dropped. The timer should be configured to be at least the sum of the Keep-Alive Timer and one round-trip delay.
Range: 3000 — 60000
Default: 5000
Tcl Parameter: QsaalNumRetries_1
When a link is in the transient phase (a POLL PDU has been sent and there are no PDUs to be transmitted or received), the Keep-Alive timer tracks the maximum number of milliseconds that the link will stay in the transient phase. The timer is stopped and the link will revert back to active phase when a new SD PDU is sent. If the timer is running when a STAT PDU is received, the link moves to the idle phase, this timer is stopped, and the Idle timer is started. Typically this timer is greater than the Poll Timer and greater than one round-trip delay.
Range: 1 — 60000
Default: 100
Tcl Parameter: QsaalKeepAliveTmr_1
The CC timer tracks the maximum number of milliseconds between transmission of BGN, END, RS, and ER PDUs when acknowledgement of these PDUs is not received. This timer should be considerably greater than one round-trip delay.
Range: 1 — 60000
Default: 200
Tcl Parameter: QsaalCcTmr_1