ETSI
ETSI TR 121 905 V11.2.0 (2012
3GPP TR 21.905 version 11.2.0 Release 11
Capability Class: A piece of information which indicates general 3GPP System mobile station characteristics (e.g.
supported radio interfaces,...) for the interest of the network.
Card session: A link between the card and the external world starting with the ATR and ending with a subsequent reset
or a deactivation of the card.
CBS DRX cycle: The time interval between successive readings of BMC messages.
Cell: Radio network object that can be uniquely identified by a User Equipment from a (cell) identification that is
broadcasted over a geographical area from one UTRAN Access Point. A Cell is either FDD or TDD mode.
Cell Radio Network Temporary Identifier (C-RNTI): The C-RNTI is a UE identifier allocated by a controlling
RNC and it is unique within one cell controlled by the allocating CRNC. C-RNTI can be reallocated when a UE
accesses a new cell with the cell update procedure.
Cellular Text telephone Modem (CTM): A modulation and coding method intended for transmission of text in voice
channels for the application of real time text conversation.
Channel bandwidth: The RF bandwidth supporting a single RF carrier with the transmission bandwidth configured in
the uplink or downlink of a cell. The channel bandwidth is measured in MHz and is used as a reference for transmitter
and receiver RF requirements.
Channel edge: The lowest and highest frequency of the carrier, separated by the channel bandwidth.
Chargeable Event: An activity utilising telecommunications network infrastructure and related services for user to user
communication (e.g. a single call, a data communication session or a short message), or for user to network
communication (e.g. service profile administration), or for inter-network communication (e.g. transferring calls,
signalling, or short messages), or for mobility (e.g. roaming or inter-system handover), which the network operator
wants to charge for. The cost of a chargeable event may cover the cost of sending, transporting, delivery and storage.
The cost of call related signalling may also be included.
Charged Party: A user involved in a chargeable event who has to pay parts or the whole charges of the chargeable
event, or a third party paying the charges caused by one or all users involved in the chargeable event, or a network
operator.
Charging: A function whereby information related to a chargeable event is formatted and transferred in order to make
it possible to determine usage for which the charged party may be billed.
Charging Data Record (CDR): A formatted collection of information about a chargeable event (e.g. time of call set-
up, duration of the call, amount of data transferred, etc) for use in billing and accounting. For each party to be charged
for parts of or all charges of a chargeable event a separate CDR shall be generated, i.e more than one CDR may be
generated for a single chargeable event, e.g. because of its long duration, or because more than one charged party is to
be charged.
Cipher key: A code used in conjunction with a security algorithm to encode and decode user and/or signalling data.
Closed group: A group with a pre-defined set of members. Only defined members may participate in a closed group.
Closed Subscriber Group (CSG): A Closed Subscriber Group identifies subscribers of an operator who are permitted
to access one or more cells of the PLMN but which have restricted access (CSG cells).
Coded Composite Transport Channel: A data stream resulting from encoding and multiplexing of one or several
transport channels.
Common Channel: A Channel not dedicated to a specific UE.
Confidentiality: The avoidance of disclosure of information without the permission of its owner.
Connected Mode: Connected mode is the state of User Equipment switched on and an RRC connection established.
Connection: A communication channel between two or more end-points (e.g. terminal, server etc.).
Connection mode: The type of association between two points as required by the bearer service for the transfer of
information. A bearer service is either connection-oriented or connectionless. In a connection oriented mode, a logical
association called connection needs to be established between the source and the destination entities before information
can be exchanged between them. Connection oriented bearer services lifetime is the period of time between the