6103 AIME AMR/CT : AMR Conformance Test System
The world's first AMR Conformance Test System
features:
- User friendly script driven
test scenarios
- Continuous logging of all
layer 2 and layer 3 messages
- Automatic layer 3 message
encoding
- Protocol regression testing
and fault finding
- Full suite of fully validated GCF approved
test cases
- Full training and support included with each
system
The recent introduction of AMR (Adaptive Multi
Rate) speech frames presents a new challenge for
the GSM test solution provider. Not only must
half rate, full rate and enhanced full rate speech
frames be created, encoded and decoded, but support
must also be provided for eight new full rate
coding schemes and six new half rate coding schemes.
Additionally, the adaptive nature of AMR must
be accommodated. With each AMR speech frame (50
per second) a set of in-band control bits are
sent. These allow the current coding rate to be
signaled, in addition to requests for changes
in the rate of the remote sender. Also, it should
be noted that AMR is asymmetric – uplink
and downlink coding rates can be changed independently.
Additionally, the in-band signaling allows only
a selection of four rates from the possible six
or eight to be in use at any one time. These four
rates are referred to as the active codec set.
AMR allows for the uplink and downlink active
codec sets to be different. AMR also introduces
a new set of DTX frames, very much complicating
the whole DTX procedure.
The Aeroflex range of GSM AIME (Air Interface Monitor
& Emulator) test solutions may now be complemented
with the addition of the AMR AIME option. The
capabilities of the AMR AIME test system are as
follows:
- Verification of correct coding
of frames by examining data visually at the
d interface (8 coding schemes for full rate,
6 coding schemes for half rate).
- Confirmation of coding of
frames and parity (each output polynomial can
be separately verified).
- Verification of correct coding
of SID frames.
- Verification of correct coding
of frames associated with DTX.
- Verification of correct coding
of RATSCCH frames.
- Verification of correct implementation
of procedures associated with RATSCCH messages.
- Confirmation of the correct
operation of the adaptive nature.
- Verification of correct behavior
of the receive sub-system when presented with
frames with bad CRC and invalid in-band signaling
combinations.
- Verification of subjective
operation of codecs (both encode and decode).
AMR Conformance Test
One of the main applications of the AMR AIME/CT
system is to perform conformance tests on AMR
capable mobile terminals. The AMR AIME/CT provides
the core functionality to perform all the relevant
tests. For certain tests, additional test equipment
is required.
The test scripts required to support these conformance
test cases have been pre-written and are grouped
into five separate packages, any combination of
which may be purchased.
Option 601 - Protocol Tests
The following GCF approved test cases are supported
by this option in conjunction with the Aeroflex AMR
AIME/CT Protocol Test System.
- 51.010 26.16.1 Inband signaling
- downlink codec adaptation
- 51.010 26.16.2 Inband signaling
- uplink codec adaptation
- 51.010 26.16.3 Structured
procedures / MS terminated call / early assignment
- 51.010 26.16.4 Structured
procedures / MS originated call / late assignment
- 51.010 26.16.5 AMR signaling
/ handover / active call / successful case
- 51.010 26.16.6 Structured
procedures / emergency call
- 51.010 26.16.7 AMR signaling
/ directed retry / MO call
- 51.010 26.16.8 AMR signaling
/ directed retry / MT call
Option 602 - Layer 1 Tests
The following GCF approved test cases are supported
by this option in conjunction with the Aeroflex AMR
AIME/CT Protocol Test System.
- 51.010 14.2.10 Reference
sensitivity - TCH/AFS
- 51.010 14.2.18 Reference
sensitivity - TCH/AHS
- 51.010 14.4.8 Co-channel
rejection - TCH/AFS
- 51.010 14.4.16 Co-channel
rejection - TCH/AHS
- 51.010 14.5.1.2 Adjacent
channel rejection - TCH/AFS
- 51.010 14.5.1.3 Adjacent
channel rejection - TCH/AHS
Option 603 - Protocol Tests
The following GCF approved test cases are supported
by this option in conjunction with the Aeroflex AMR
AIME/CT Protocol Test System.
- 51.010 26.16.3a Structured
procedures / MT call / early assignment / specified
initial codec rate
- 51.010 26.16.4a Structured
procedures / MO call / late assignment / no
initial codec mode
- 51.010 26.16.10 Inversion
of the phase of the CMR/CMI
- 51.010 26.16.11 Handover
/ layer 1 failure
- Option 604 - RATSCCH Tests
The following GCF approved test cases are supported
by this option in conjunction with the Aeroflex AMR
AIME/CT Protocol Test System.
- 51.010 26.16.9.1 AMR configuration
change - normal
- 51.010 26.16.9.2 AMR configuration
change - abnormal
- 51.010 26.16.9.3 Codec mode
phase change - normal
- 51.010 26.16.9.4 Codec mode
phase change - abnormal
- 51.010 26.16.9.5 Threshold
change - normal
- 51.010 26.16.9.6 Threshold
change - abnormal
- 51.010 26.16.9.7 Unknown
RATSCCH REQ message
- 51.010 26.16.9.8 Ignore subsequent
REQ prior to expiry of REQ_Activation counter
- 51.010 26.16.9.9 Initialization
of transaction with ACK_OK, ACK_ERR or ACK_UNKNOWN
- 51.010 26.16.9.10 Inversion
of the phase of the CMR/CMI
- 51.010 26.16.9.11 Change
of active code set
- 51.010 26.16.9.12 Change
of thresholds without changing ACS
- Option 605 - Layer 1 Tests
The following test cases are supported by this
option in conjunction with the Aeroflex AMR AIME/CT
Protocol Test System.
- 51.010 14.2.19 Reference sensitivity - TCH/AFS-INB
- 51.010 14.2.20 Reference sensitivity - TCH/AHS-INB
- 51.010 14.4.17 Co-channel rejection - TCH/AFS-INB
- 51.010 14.4.18 Co-channel rejection - TCH/AHS-INB
-
51.010 14.10.1 Performance of the codec mode
request generation - TCH/AFS
- 51.010 14.10.2 Performance of the codec mode
request generation - TCH/AHS
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