Preferred Control Channel Cycle
Last updated: May 24, 2006
Preferred control channel cycle (PCCC) determines when the access terminal (AT) transitions out of the Sleep State in order to monitor the Control Channel (The AT in sleep state will shut down some processing resources to reduce power consumption).
The Preferred Control Channel Cycle attribute is a "Configurable Attribute" for Idle State Protocol as defined in the C.S0024 standard. It is configured during the session negotiation.
When the session is open, the
Preferred Control Channel Cycle
being used for the session is displayed on the
Access Network Information
screen in the
Configurable Attribute In Use
window and can be queried using the
CALL:STATus:CCHannel:PCCCycle:NUMBer?
and
CALL:STATus:CCHannel:PCCCycle:STATe?
.
Preferred Control Channel Cycle Control
The test set supports two session negotiation control mode for the PCCC attribute:
AN Specified Control Mode
and
AT Specified Control Mode
.
-
When the
Preferred Control Channel Cycle Control
is set to
AN Specified
,
-
the test set specified PCCC value, if successfully negotiated, will be configured for the session.
-
the PCCC is disabled (off) on the test set by default. This means the PCCC value is determined by applying a hash function (as defined in the C.S0024 standard) that uses the session seed and the number of control channel cycles. Most of the ATs can successfully negotiate to use the hashed default value.
-
if you enable the PCCC setting and want to set on the test set, you must know the PCCC value specific for the AT. The PCCC value varies from AT to AT depending on the IMSI or ESN of the AT. Improper PCCC value will result in a rejection from the AT during session negotiation.
-
When the
Preferred Control Channel Cycle Control
is set to
AT Specified
,
-
the AT-requested PCCC value, if successfully negotiated, will be configured for the session.
-
the test set does not send any Configuration Request message for the PCCC attribute. So changing the PCCC setting on the test set has no effect on the current session. The new setting is simply stored by the test set until the next session negotiation when the negotiation control is set to
AN Specified
mode.
-
it is useful for some hybrid mode ATs that only function with certain PCCC value and do not allow to use the hashed default value. You do not have to know the PCCC value specific for each AT prior to the proper setting because the AT-requested PCCC value will be configured for the session.
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