Last updated: November 3, 2008
This section is only applicable to the lab application and to a test application with the required feature license.
In Active Cell operating mode and IS-856 Test operating mode, the
PL Subtype 2 Access Channel MAC Subtype
allows you to select either the
Default
or the
Enhanced
Access Channel MAC protocol subtype when the
Protocol Rel
is set to release
A (1xEV-DO-A)
and the
Release A Physical Layer Subtype
is set to
Subtype 2
, or the
Protocol Rel
is set to release
B (1xEV-DO-B)
and the
Release B Physical Layer Subtype
is set to
. In Active Cell operation mode what you set is negotiated with the AT during
Session Negotiate State
. When the test set is configured to subtype 0 physical layer, only the Default Access Channel MAC protocol is negotiated.
Subtype 2 or
Subtype 3
The Default (Subtype 0) indicates that the protocol subtype assigned to the Access Channel MAC protocol is Default Access Channel MAC and its Subtype ID number is 0x0000. The Enhanced (Subtype 1) indicates that the protocol subtype assigned to the Access Channel MAC protocol is Enhanced Access Channel MAC and its Subtype ID number is 0x0001.
As defined by the C.S0024 standard, when a session is not open, the test set is internally configured to the Default Access Channel MAC protocol. When a session is successfully open, the specified Access Channel MAC Subtype is configured for the session.
As shown in the table below, the current Access Channel MAC Subtype indicates the Access Channel MAC protocol that the test set is emulating. It is displayed on the Configurable Attribute In Use window on the Access Network Information screen or can be queried with CALL:STATus:PROTocol:ACMac? .
Connection State | |||
---|---|---|---|
Idle State (session not open) | Default Access Channel MAC protocol | ||
Session Open or Connected | Default or Enhanced Access Channel MAC protocol (depending on the setting of Access Channel MAC Subtype ) | ||
Idle State (session not open) | Default Access Channel MAC protocol | ||
Session Open or Connected | Default or Enhanced Access Channel MAC protocol (depending on the setting of Access Channel MAC Subtype ) | ||
Does not matter | Default Access Channel MAC protocol | ||
A (1xEV-DO-A) | Idle State (session not open) | Default Access Channel MAC protocol | |
Session Open or Connected | Default or Enhanced Access Channel MAC protocol (depending on the setting of Access Channel MAC Subtype ) | ||
Does not matter | Default Access Channel MAC protocol | ||
0 (1xEV-DO) | Does not matter | Default Access Channel MAC protocol |
When the Physical Layer Subtype is set to
Subtype 2
or Subtype 3, changing the
Access Channel MAC Subtype
results in a session re-negotiation once a session is open. If a connection is open, changing the
Access Channel MAC Subtype
results in the connection dropped with signaling. You will have to re-open the connection. For details, see
Session Negotiate State
.
Access Channel MAC Subtype
defaults to the
Enhanced
setting. Negotiating a session when Physical Layer Subtype is set to
Subtype 2
or Subtype 3 will fail if the AT does not support Enhanced Access Channel MAC protocol. When using an AT that does
not
support Enhanced Access Channel MAC Protocol, the
Access Channel MAC Subtype
should be changed from Enhanced to Default.GPIB Command: CALL[:CELL]:PROTocol:ACMac