3 Definitions and abbreviations

04.603GPPGeneral Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 1999TS

Abbreviations used in the present document are listed in 3GPP TS 01.04 and 3GPP TS 02.60.

3.1 Vocabulary

The following terms are used in this Technical Specification:

Block period: A block period is the sequence of four timeslots on a PDCH used to convey one radio block.

Dual transfer mode: In dual transfer mode, the mobile station is allocated radio resources providing an RR connection (3GPP TS 04.18) and a Temporary Block Flow on one or more packet data physical channels. The allocation of radio resource for the RR connection and the Temporary Block Flow is co-ordinated by the network in agreement with the capabilities of the mobile station in dual transfer mode.

EGPRS: Enhanced GPRS, enables higher data rates through usage of 8PSK modulation in addition to GMSK. EGPRS also enables Incremental Redundancy operation.

EGPRS TBF mode: refers to a TBF utilising the EGPRS enhancements, e.g. 8PSK modulation and Incremental Redundancy operation.

GPRS multislot class: The term GPRS multislot class refers to the different mobile station capabilities to transmit and receive on different combinations of multiple PDCHs. The multislot classes are defined in 3GPP TS 05.02. Note that the mobile station may indicate different multislot classes for circuit mode services and for GPRS (see 3GPP TS 04.08). Different multislot class mobile stations are capable of supporting different medium access modes (see sub-clause 5.2.4).

GPRS TBF mode: refers to a TBF not utilising the EGPRS enhancements, e.g. 8PSK modulation and Incremental Redundancy operation.

IR: Incremental redundancy, enables higher data rates through combining information from different transmissions of RLC data blocks when decoding. Also known as Hybrid Type II/III ARQ.

MCS: Modulation and Coding Scheme.

Packet flow context: Packet Flow Context (PFC) procedures are described in 3GPP TS 23.060. A Packet Flow Identifier (PFI) is used to identify a PFC.

Packet idle mode: In packet idle mode, the mobile station is prepared to transfer LLC PDUs on packet data physical channels (see sub-clause 5.3). The mobile station is not allocated any radio resource on a packet data physical channel; it listens to the PBCCH and PCCCH or, if those are not provided by the network, to the BCCH and the CCCH;

Packet transfer mode: In packet transfer mode, the mobile station is prepared to transfer LLC PDUs on packet data physical channels (see sub-clause 5.4). The mobile station is allocated radio resource on one or more packet data physical channels for the transfer of LLC PDUs.

Radio block: A radio block is the sequence of four normal bursts carrying one RLC/MAC protocol data units (see 3GPP TS 04.04). (The one exception is a radio block occasionally used on PACCH consisting of a sequence of four access bursts, each carrying a repetition of one short RLC/MAC block.)

Random values: In a number of places in this Technical Specification, it is mentioned that some value must take a "random" value, in a given range, or more generally with some statistical distribution. For such random values refer to 3GPP TS 04.08.

RLC/MAC block: A RLC/MAC block is the protocol data unit exchanged between RLC/MAC entities (see clause 10 and 3GPP TS 04.04).

RLC/MAC control block: A RLC/MAC control block is the part of a RLC/MAC block carrying a control message between RLC/MAC entities (see sub-clause 10.3).

RR connection: An RR connection is a physical connection established between a mobile station and the network to support the upper layers’ exchange of information flows. An RR connection is maintained and released by the two peer entities.

RLC data block: A RLC data block is the part of a RLC/MAC block carrying user data or upper layers’ signalling data (see sub-clause 10.2).

TBF abort: The term "abort" as applied to TBF is used when the TBF is abruptly stopped without using the Release of TBF procedures defined in sub-clause 9.

TBF release: The term "release" as applied to TBF is used when the TBF is stopped using one of the Release of TBF procedures defined in sub-clause 9.

Temporary Block Flow (TBF): A Temporary Block Flow (TBF) is a physical connection used by the two RR peer entities to support the unidirectional transfer of LLC PDUs on packet data physical channels (see sub-clause 5.2.1).

Timer Expiry: A started timer has run the time specified.

Timer Restart: A timer that may already be running is stopped and then started again to run the time specified.

Timer Start: A timer is started to run the time specified.

Timer Stop: A started timer is stopped and its value is then undefined.

Uplink State Flag (USF): The Uplink State Flag (USF) is used on PDCH channel(s) to allow multiplexing of uplink Radio blocks from different mobile stations (see sub-clause 5.2.3, clause 10 and 3GPP TS 05.02).