Sierra Wireless AirPrime SL808 Series Product Technical Specification & Customer Design Manuallines page 87

Table 7-2: Supported GSM / GPRS specifications (Continued)
Item
(SL8080/82/84)
PBCCH / PCCCHI
GPRS test modes (ETSI test
mode A and B)
NACC (R4 GERAN Feature
Set 1)
MAIO
Packet enhanced
measurement report (PEMR)
Delayed TBF Release
Extended Dynamic Allocation
Single Antenna Interference
Cancellation (SAIC)
Rev 1 Dec.10 Proprietary and Confidential - Specifications subject to change
Comments
Packet Broadcast Control Channel
PBCCH is a packet data signaling channel that can supplement
the BCCH GSM control channel, allowing decoupling of voice
and packet control channels to set up data calls. PBCCH
broadcasts GPRS / EGPRS specific cell re-selection
parameters for serving and neighbor cells used in cell selection /
re-selection for packet services.
The European Telecommunications Standards Institute (ETSI)
defines standards and requirements for testing of GSM mobile
equipment.
In test mode A, the mobile requests an uplink TBF and transmits
random data on a designated number of timeslots. This causes
a device to transmit data without using upper layer protocols.
Once the transmission has started, the downlink TBF halts. The
device remains in this mode until the testing equipment
terminates it.
In test mode B, the mobile is prompted to receive data on a
number of specified downlink timeslots and re-transmit the same
data back on the corresponding uplink timeslots. Test mode B
allows tests to be performed on both the transmitter and
receiver within a single session.
Network Assisted Cell Change
Enables the network to provide additional information about
neighbor cells to the mobile while in a packet data session,
which decreases the experienced service delays caused by cell
re-selection.
Mobile Allocation Index Offset
MAIO and Hopping Sequence Number (HSN) are used in
conjunction with Frequency Hopping to determine the hopping
sequence used in each frame. The MAIO supports as many
values as there are frequencies in the hopping list, and these
are used to indicate the offset within the hopping list that
identifies the frequency used.
Packet Enhanced Measurement Report (PEMR) is one of the
RLC / MAC (Radio Link Control and Medium Access Control)
control messages that include a carrier identifier. This message
is a requirement of supporting multicarrier TBF.
Delayed Temporary Block Flow Release (also called Extended
Uplink TBF)
Delayed TBF Release reduces latency between uplink data
transfers and reduced signaling on the network by maintaining a
connection for brief periods when the network is temporarily
inactive and the mobile station has no radio link control
information to send. For this feature to work properly, the mobile
station must support delayed TBF release.
Radio blocks can be transmitted on up to four different PDCHs.
Permits full class 12 operation.
SAIC mitigates code-channel interference from neighboring
cells resulting in fewer dropped calls, and faster download rates
for e-mail and websites.
87