Cisco ASR 5000 series Product Overview page 991

Glossary
Simple IP. The most commonly used routing protocol on the Internet. This is the IP portion of the TCP/IP suite of
protocols used in wireless packet communications.
SIT. System Initiation Task. This critical task is responsible for starting all tasks and system initialization.
SMC. System Management Card, used with the Packet Services Card (PSC) in the ASR 5000 hardware platform. It
serves as the primary controller and is responsible for initializing the entire system and loading the software's
configuration image into other cards in the chassis as applicable. Provides out-of-band management interfaces and
access to centralized chassis resources.
SoLSA exclusive access. Cells on which normal camping is allowed only for MS with Localised Service Area (LSA)
subscription.
Source Base Station. The BS that is in control of the call is designated the source BS and remains the source BS until it
is removed from control of the call.
Source Context. The context that a mobile subscribers is placed into by the system when they connect to the system
through a PCF.
Source routing. A routing technique that causes some or all intermediate routing points to be represented directly in the
data packet to be forwarded. This is in contrast to the typical situation in which intermediate routers rely on acquired
routing state information to forward incoming packets.
SPIO. Switch Processor I/O card. Interface card within the system that provides input/output and management
interfaces for its corresponding management card.
SS7 Routing Domain. A proprietary concept designed to facilitate the creation and management of SS7-based
configuration parameters (e.g., link ids and application server processes) by organizing and grouping them.
Static Charging Rule. Charging rule where all the data within the charging rule (e.g. service data flow filter
information) is statically assigned by configuration. Static charging rule are typically configured in system.
STM. SONET Timing Module. Provides Stratum 3 timing for both TDM and packet interfaces.
T
TAI. Tracking Area Identifier. A tracking area that consists of multiple eNBs.
TAI list. A list of TAIs that identify the tracking areas that the UE can enter without performing a tracking area
updating procedure. The TAIs in a TAI list assigned by an MME to a UE pertain to the same MME area.
TDM. Time Division Multiplex. A technique for simultaneously transmitting a number of separate data signals over a
single communications medium by interleaving a part of each signal one after another.
TDMA. Time Division Multiple Access. One of the wireless technology classes that encompasses 2G, 2.5G, and 3G
communications. The other is CDMA.
TIA. Tunnel Inner Address. An IP address assigned by a PDIF/FA and used to create the initial CHILD_SA. After
authentication and the creation of a new IPSec_SA with the HoA, the initial CHILD_SA is torn down and the address
returned to the pool.
TLLI. Temporary Logical Link Identifier. This Id is derived from the P-TMSI and the RA to uniquely identify an MS
in a GPRS sub-network.
Traffic Category. User plane data traffic subject to the same access cost and rating type. A traffic category is identified
by a Rating-Group and gathers a set of services.
Traffic flow aggregate. A temporary aggregate of packet filters that are included in a UE requested bearer resource
modification procedure and that is inserted into a traffic flow template (TFT) for an EPS bearer context by the network
once the UE requested bearer resource modification procedure is completed.
Triangular routing. The path followed by a packet from a correspondent host to a mobile node that must first be routed
to the mobile node's Home Agent (HA).
Tunnel. A path followed by a first packet while it is encapsulated within the payload portion of a second packet.
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