`
`Technical Specification
`
`3rd Generation Partnership Project;
`Technical Specification Group Radio Access Network;
`Physical layer - General description
`(3G TS 25.201 version 3.0.0)
`
`
`
`
`
`The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP.
`The present document has not been subject to any approval process by the 3GPP Organisational Partners and shall not be implemented.
`This Specification is provided for future development work within 3GPP only. The Organisational Partners accept no liability for any use of this Specification.
`Specifications and reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organisational Partners' Publications Offices.
`
`1
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`APPLE 1021
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`3G TS 25.201 version 3.0.0
`
`2
`
`3G TS 25.201 V3.0.0 (1999-10)
`
`Reference
`DTS/TSGR-0125201U
`
`Keywords
`
`
`3GPP
`
`Postal address
`
`
`3GPP support office address
`650 Route des Lucioles - Sophia Antipolis
`Valbonne - FRANCE
`Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
`
`Internet
`http://www.3gpp.org
`
`
`
`
`
`Copyright Notification
`
`No part may be reproduced except as authorized by written permission.
`The copyright and the foregoing restriction extend to reproduction in all media.
`
`© 1999, 3GPP Organizational Partners (ARIB, CWTS, ETSI, T1, TTA,TTC).
`All rights reserved.
`
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`3GPP
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`3G TS 25.201 version 3.0.0
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`3G TS 25.201 V3.0.0 (1999-10)
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`Contents
`
`Foreword ............................................................................................................................................................ 4
`1
`Scope ........................................................................................................................................................ 5
`2
`References ................................................................................................................................................ 5
`3
`Definitions, symbols and abbreviations ................................................................................................... 6
`3.1
`Definitions ......................................................................................................................................................... 6
`3.2
`Symbols ............................................................................................................................................................. 6
`3.3
`Abbreviations ..................................................................................................................................................... 6
`4
`General description of Layer 1 ................................................................................................................. 7
`4.1
`Relation to other layers ...................................................................................................................................... 7
`4.1.1
`General Protocol Architecture ...................................................................................................................... 7
`4.1.2
`Service provided to upper layer ................................................................................................................... 7
`4.2
`General description of Layer 1 .......................................................................................................................... 8
`4.2.1
`Multiple Access ............................................................................................................................................ 8
`4.2.2
`Channel coding and interleaving .................................................................................................................. 8
`4.2.3
`Modulation and spreading ............................................................................................................................ 9
`4.2.4
`Physical layer procedures ............................................................................................................................. 9
`4.2.5
`Physical layer measurements ....................................................................................................................... 9
`5
`Document structure of physical layer specification ................................................................................. 9
`5.1
`Overview ........................................................................................................................................................... 9
`5.2
`TS 25.201: Physical layer – General description ............................................................................................. 10
`5.3
`TS 25.211: Physical channels and mapping of transport channels onto physical channels (FDD) ................. 10
`5.4
`TS 25.212: Multiplexing and channel coding (FDD) ...................................................................................... 10
`5.5
`TS 25.213: Spreading and modulation (FDD) ................................................................................................. 10
`5.6
`TS 25.214: Physical layer procedures (FDD) .................................................................................................. 11
`5.7
`TS 25.215: Physical layer – Measurements (FDD) ......................................................................................... 11
`5.8
`TS 25.221: Physical channels and mapping of transport channels onto physical channels (TDD) ................. 11
`5.9
`TS 25.222: Multiplexing and channel coding (TDD) ...................................................................................... 11
`5.10
`TS 25.223: Spreading and modulation (TDD)................................................................................................. 11
`5.11
`TS 25.224: Physical layer procedures (TDD) .................................................................................................. 12
`5.12
`TS 25.225: Physical layer – Measurements (TDD) ......................................................................................... 12
`5.13
`TR R1.02: User Equipment physical layer capabilities ................................................................................... 12
`5.14
`TR R1.04: [Channel coding and multiplexing examples] ................................................................................ 12
`5.15
`TR R1.03: Physical layer items not included in Release ‘99 ........................................................................... 12
`History .............................................................................................................................................................. 13
`
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`3GPP
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`3G TS 25.201 version 3.0.0
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`3G TS 25.201 V3.0.0 (1999-10)
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`Foreword
`This Technical Specification has been produced by the 3GPP.
`
`The contents of the present document are subject to continuing work within the TSG and may change following formal
`TSG approval. Should the TSG modify the contents of this TS, it will be re-released by the TSG with an identifying
`change of release date and an increase in version number as follows:
`
`Version 3.y.z
`
`where:
`
`x
`
`the first digit:
`
`1 presented to TSG for information;
`
`2 presented to TSG for approval;
`
`3
`
`Indicates TSG approved document under change control.
`
`y
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`the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
`updates, etc.
`
`z
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`the third digit is incremented when editorial only changes have been incorporated in the specification;
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`3GPP
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`Physical layer items not included in Release ‘99
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`3G TS 25.201 V3.0.0 (1999-10)
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`Scope
`1
`This specification gives a general description of the physical layer of the UTRA radio interface. This specification also
`describes the document structure of the 3GPP physical layer specifications, i.e. TS 25.200 series. The TS 25.200 series
`specifies the Uu point for the 3G mobile system, and defines the minimum level of specifications required for basic
`connections in terms of mutual connectivity and compatibility.
`
`References
`2
`The following documents contain provisions which, through reference in this text, constitute provisions of the present
`document.
`
` References are either specific (identified by date of publication, edition number, version number, etc.) or
`non-specific.
`
` For a specific reference, subsequent revisions do not apply.
`
` For a non-specific reference, the latest version applies.
`
`[1]
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`[18]
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`[19]
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`3GPP TS 25.211: "Physical channels and mapping of transport channels onto physical channels
`(FDD)"
`
`3GPP TS 25.212: "Multiplexing and channel coding (FDD)"
`
`3GPP TS 25.213: "Spreading and modulation (FDD)"
`
`3GPP TS 25.214: "Physical layer procedures (FDD)"
`
`3GPP TS 25.215: "Physical layer – Measurements (FDD)"
`
`3GPP TS 25.221: "Physical channels and mapping of transport channels onto physical channels
`(TDD)"
`
`3GPP TS 25.222: "Multiplexing and channel coding (TDD)"
`
`3GPP TS 25.223: "Spreading and modulation (TDD)"
`
`3GPP TS 25.224: "Physical layer procedures (TDD)"
`
`3GPP TS 25.225: "Physical layer – Measurements (TDD)"
`
`3GPP TR R1.02: "User Equipment physical layer capabilities"
`
`3GPP TR R1.04: "[Channel coding and multiplexing examples]"
`
`3GPP TR R1.03: "Physical layer items not included in Release ‘99"
`
`3GPP TS 25.301: "Radio Interface Protocol Architecture"
`
`3GPP TS 25.302: "Services provided by the physical layer"
`
`3GPP TS 25.101: "UE Radio transmission and reception (FDD)"
`
`3GPP TS 25.102: "UE Radio transmission and reception (TDD)"
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`3GPP TS 25.104: "BTS Radio transmission and reception (FDD)"
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`3GPP TS 25.105: "BTS Radio transmission and reception (TDD)"
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`Definitions, symbols and abbreviations
`
`Definitions
`3.1
`For the purposes of the present document, the [following] terms and definitions [given in ... and the following] apply.
`
`Symbols
`3.2
`For the purposes of the present document, the following symbols apply:
`
`Abbreviations
`3.3
`For the purposes of the present document, the following abbreviations apply:
`
`ARQ
`BER
`CCTrCH
`DCA
`DCH
`DS-CDMA
`FAUSCH
`FDD
`FEC
`FER
`GSM
`L1
`L2
`L3
`LAC
`MAC
`Mcps
`ODMA
`PSCH
`PCS
`PHS
`QPSK
`RACH
`RF
`RLC
`RRC
`SAP
`SCCC
`SCH
`SIR
`TDD
`TDMA
`TFCI
`UE
`UMTS
`UTRA
`UTRAN
`WCDMA
`
`
`Automatic Repeat Request
`Bit Error Rate
`Coded Composite Transport Channel
`Dynamic channel allocation
`Dedicated Channel
`Direct-Sequence Code Division Multiple Access
`Fast Upink Signalling Channel
`Frequency Division Duplex
`Forward Error Correction
`Frame Error Rate
`Global System for Mobile Communication
`Layer 1 (physical layer)
`Layer 2 (data link layer)
`Layer 3 (network layer)
`Link Access Control
`Medium Access Control
`Mega Chip Per Second
`Opportunity Driven Multiple Access
`Physical Shared Channel
`Personal Communications System
`Persona Handyphone System
`Quaternary Phase Shift Keying
`Random Access Channel
`Radio Frequency
`Radio Link Control
`Radio Resource Control
`Service Access Point
`Serial Concatenated Convolutional Code
`Synchronisation Channel
`Signal-to-Interference Ratio
`Time Division Duplex
`Time Division Multiple Access
`Transport-Format Combination Indicator
`User Equipment
`Universal Mobile Telecommunications System
`UMTS Terrestrial Radio Access
`UMTS Terrestrial Radio Access Network
`Wide-band Code Division Multiple Access
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`4
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`General description of Layer 1
`
`4.1
`
`Relation to other layers
`
`4.1.1 General Protocol Architecture
`Radio interface which is prescribed by this specification means the Uu point between User Equipment (UE) and
`network. The radio interface is composed of Layers 1, 2 and 3. Layer 1 is based on WCDMA technology and the TS
`25.200 series describes the Layer-1 specification. Layers 2 and 3 of the radio interface are described in the TS 25.300
`and 25.400 series, respectively.
`
`Layer 3
`
`Radio Resource Control (RRC)
`
`Medium
`
`Access
`
`Control
`
`Physical layer
`
`Logical channels
`
`Transport channels
`
`
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`Control / Measurements
`
`Layer 2
`
`Layer 1
`
`Figure 4-1: Radio interface protocol architecture around the physical layer
`
`Figure 4-1 shows the UTRA radio interface protocol architecture around the physical layer (Layer 1). The physical
`layer interfaces the Medium Access Control (MAC) sub-layer of Layer 2 and the Radio Resource Control (RRC) Layer
`of Layer 3. The circles between different layer/sub-layers indicate Service Access Points (SAPs). The physical layer
`offers different Transport channels to MAC. A transport channel is characterized by how the information is transferred
`over the radio interface. MAC offers different Logical channels to the Radio Link Control (RLC) sub-layer of Layer 2.
`A logical channel is characterized by the type of information transferred. Physical channels are defined in the physical
`layer. There are two duplex modes: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). In the FDD
`mode a physical channel is characterized by the code, frequency and in the uplink the relative phase (I/Q). In the TDD
`mode the physical channels is also characterized by the timeslot. The physical layer is controlled by RRC.
`
`Service provided to upper layer
`4.1.2
`The physical layer offers data transport services to higher layers. The access to these services is through the use of
`transport channels via the MAC sub-layer. The physical layer is expected to perform the following functions in order to
`provide the data transport service. See also TS 25.302.
`
`- Macrodiversity distribution/combining and soft handover execution
`
`- Error detection on transport channels and indication to higher layers
`
`- FEC encoding/decoding of transport channels
`
`- Multiplexing of transport channels and demultiplexing of coded composite transport channels
`
`- Rate matching (data multiplexed on DCH)
`
`- Mapping of coded composite transport channels on physical channels
`
`- Power weighting and combining of physical channels
`
`- Modulation and spreading/demodulation and despreading of physical channels
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`- Frequency and time (chip, bit, slot, frame) synchronisation
`
`- Radio characteristics measurements including FER, SIR, Interference Power, etc., and indication to higher layers
`
`-
`
`Inner -loop power control
`
`- RF processing <Note: RF processing is defined in TS 25.100 series>
`
`When network elements (UEs and network) provide compatible service bearers (for example support a speech bearer)
`they should be assured of successful interworking. Moreover, different implementation options of the same (optional)
`feature would lead to incompatibility between UE and network. Therefore, this shall be avoided.
`
`4.2
`
`General description of Layer 1
`
`4.2.1 Multiple Access
`The access scheme is Direct-Sequence Code Division Multiple Access (DS-CDMA) with information spread over
`approximately 5 MHz bandwidth, thus also often denoted as Wideband CDMA (WCDMA) due that nature.
`
`UTRA has two modes, FDD (Frequency Division Duplex) & TDD (Time Division Duplex), for operating with paired
`and unpaired bands respectively. The possibility to operate in either FDD or TDD mode allows for efficient utilisation
`of the available spectrum according to the frequency allocation in different regions. FDD and TDD modes are defined
`as follows;
`
`FDD:
`
`TDD:
`
`A duplex method whereby uplink and downlink transmissions use two separated radio frequencies. In the
`FDD, each uplink and downlink uses the different frequency band. A pair of frequency bands which have
`specified separation shall be assigned for the system.
`
`A duplex method whereby uplink and downlink transmissions are carried over same radio frequency by
`using synchronised time intervals. In the TDD, time slots in a physical channel are divided into
`transmission and reception part. Information on uplink and downlink are transmitted reciprocally.
`
`In UTRA TDD there is TDMA component in the multiple access in addition to DS-CDMA. Thus the multiple access
`has been also often denoted as TDMA/CDMA due added TDMA nature.
`
`A 10 ms radio frame is divided into 15 slots (2560 chip/slot at the chip rate 3.84 Mcps). A physical channel is therefore
`defined as a code (or number of codes) and additionally in TDD mode the sequence of time slots completes the
`definition of a physical channel.
`
`The information rate of the channel varies with the symbol rate being derived from the 3.84 Mcps chip rate and the
`spreading factor. Spreading factors are from 256 to 4 with FDD uplink, from 512 to 4 with FDD downlink, and from 16
`to 1 for TDD uplink and downlink. Thus the respective modulation symbol rates vary from 960 k symbols/s to 15 k
`symbols/s (7.5 k symbols/s) for FDD uplink (downlink), and for TDD the momentary modulation symbol rates shall
`vary from 3.84 M symbols/s to 240 k symbols/s.
`
`Furthermore, relaying between nodes can be used by means of Opportunity Driven Multiple Access (ODMA) in TDD
`mode.
`
`Channel coding and interleaving
`4.2.2
`For the channel coding in UTRA three options are supported:
`
`- Convolutional coding,
`
`- Turbo coding
`
`- No channel coding.
`
`Channel coding selection is indicated by upper layers. In order to randomise transmission errors, bit interleaving is
`performed further.
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`4.2.3 Modulation and spreading
`The UTRA modulation scheme is QPSK. Pulse shaping is specified in the TS 25.100 series.
`
`With CDMA nature the spreading (& scrambling) process is closely associated with modulation. In UTRA different
`families of spreading codes are used to spread the signal.
`
`- For separating channels from same source, channelisation codes derived with the code tree structure as given in
`TS 25.213 and 25.223 are used.
`
`- For separating different cells the following solutions are supported:
`
`- FDD mode: Gold codes with 10 ms period (38400 chips at 3.84 Mcps) used, with the actual code itself
`length 218-1 chips, as defined in TS 25.213;
`
`- TDD mode: Scrambling codes with the length 16 used as defined in TS 25.223.
`
`- For separating different UEs the following code families are defined:
`
`- FDD mode: Gold codes with 10 ms period, or alternatively S(2) codes 256 chip period;
`
`- TDD mode: codes with period of 16 chips and midamble sequences of different length depending on the
`environment.
`
`Physical layer procedures
`4.2.4
`There are several physical layer procedures involved with UTRA operation. Such procedures covered by physical layer
`description are:
`
`1) The power control, with both inner loop and slow quality loop for FDD mode, and for TDD mode open loop in
`uplink and inner loop in downlink;
`
`2) Cell search operation;
`
`3) ODMA specific procedures such as probing for TDD mode.
`
`Physical layer measurements
`4.2.5
`Radio characteristics including FER, SIR, Interference power, etc., are measured and reported to higher layers and
`network. Such measurements are:
`
`1) Handover measurements for handover within UTRA. Specific features being determined in addition to the
`relative strength of the cell, for the FDD mode the timing relation between for cells for support of asynchronous
`soft handover;
`
`2) The measurement procedures for preparation for handover to GSM900/GSM1800;
`
`3) The measurement procedures for UE before random access process;
`
`4) The measurement procedures for Dynamic Channel Allocation (DCA) of TDD mode.
`
`5
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`Document structure of physical layer specification
`
`Overview
`5.1
`The physical layer specification consists of a general documents (TS 25.201), five FDD mode documents (TS 25.211
`through 25.215), five TDD mode documents (TS 25.221 through 25.225). In addition, there are three technical reports
`(TR R1.02, R1.04, and R1.03).
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`3G TS 25.201 V3.0.0 (1999-10)
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`TS 25.201: Physical layer – General description
`5.2
`The scope is to describe:
`
`-
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`the contents of the Layer 1documents (TS 25.200 series);
`
`- where to find information;
`
`- a general description of Layer 1.
`
`5.3
`
`TS 25.211: Physical channels and mapping of transport
`channels onto physical channels (FDD)
`The scope is to establish the characteristics of the Layer-1 transport channels and physical channels in the FDD mode,
`and to specify:
`
`-
`
`the different transport channels that exist;
`
`- which physical channels exist;
`
`- what is the structure of each physical channel, slot format etc.;
`
`-
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`relative timing between different physical channels in the same link, and relative timing between uplink and
`downlink;
`
`- mapping of transport channels onto the physical channels.
`
`TS 25.212: Multiplexing and channel coding (FDD)
`5.4
`The scope is to describe multiplexing, channel coding and interleaving in the FDD mode, and to specify:
`
`- coding and multiplexing of transport channels into CCTrCHs;
`
`- channel coding alternatives;
`
`- coding for Layer 1 control information, such as TFCI;
`
`-
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`the different interleavers;
`
`- how is rate matching done;
`
`- physical channel segmentation and mapping.
`
`TS 25.213: Spreading and modulation (FDD)
`5.5
`The scope is to establish the characteristics of the spreading and modulation in the FDD mode, and to specify:
`
`-
`
`the spreading (channelization plus scrambling);
`
`- generation of channelization and scrambling codes;
`
`- generation of RACH preamble codes;
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`- generation of SCH synchronisation codes;
`
`- modulation.
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`RF channel arrangements and Pulse shaping are specified in TS 25.101 for UE and in TS 25.104 for Node-B.
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`TS 25.214: Physical layer procedures (FDD)
`5.6
`The scope is to establish the characteristics of the physical layer procedures in the FDD mode, and to specify:
`
`- cell search procedures;
`
`- power control procedures;
`
`-
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`random access procedure.
`
`TS 25.215: Physical layer – Measurements (FDD)
`5.7
`The scope is to establish the characteristics of the physical layer measurements in the FDD mode, and to specify:
`
`-
`
`-
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`the measurements that Layer 1 is to perform;
`
`reporting of measurements to higher layers and network;
`
`- handover measurements, idle-mode measurements etc.
`
`5.8
`
`TS 25.221: Physical channels and mapping of transport
`channels onto physical channels (TDD)
`The scope is to establish the characteristics of the Layer-1 transport channels and physical channels in the TDD mode,
`and to specify:
`
`-
`
`transport channels;
`
`- physical channels, structure and contents;
`
`- mapping of transport channels onto the physical channels.
`
`TS 25.222: Multiplexing and channel coding (TDD)
`5.9
`The scope is to describe multiplexing, channel coding and interleaving in the TDD mode, and to specify:
`
`- channel coding and multiplexing of transport channels into CCTrCHs;
`
`- channel coding alternatives;
`
`- coding for Layer 1 control information, such as TFCI,
`
`-
`
`-
`
`interleaving;
`
`rate matching;
`
`- physical channel segmentationn and mapping
`
`TS 25.223: Spreading and modulation (TDD)
`5.10
`The scope is to establish the characteristics of the spreading and modulation in the TDD mode, and to specify:
`
`- data modulation;
`
`-
`
`spreading;
`
`- generation of synchronisation codes.
`
`RF channel arrangements and Pulse shaping are specified in TS 25.102 for UE and in TS 25.105 for Node-B.
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`TS 25.224: Physical layer procedures (TDD)
`5.11
`The scope is to establish the characteristics of the physical layer procedures in the TDD mode, and to specify:
`
`- Cell synchronisation;
`
`-
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`timing advance;
`
`- power control procedures;
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`-
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`idle mode tasks.
`
`TS 25.225: Physical layer – Measurements (TDD)
`5.12
`The scope is to establish the characteristics of the physical layer measurements in the TDD mode, and to specify:
`
`-
`
`-
`
`the measurements that Layer 1 is to perform;
`
`reporting of measurements to higher layers and network;
`
`- handover measurements, idle-mode measurements etc.
`
`TR R1.02: User Equipment physical layer capabilities
`5.13
`The scope is to describe the physical layer capabilities of UEs.
`
`TR R1.04: [Channel coding and multiplexing examples]
`5.14
`<Note: The document has not been finalised yet>
`
`The scope is to describe examples of channel coding and multiplexing for DCH.
`
`TR R1.03: Physical layer items not included in Release ‘99
`5.15
`The scope is to collect materials on UTRA physical layer items not included in the Release ’99 specification
`documents, such as DSCH control channel, FAUSCH, Hybrid ARQ, 4-state SCCC turbo coding.
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`3G TS 25.201 V3.0.0 (1999-10)
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`History
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`V3.0.0
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`October 1999
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`Document history
`Approved at RAN #5. Under TSG RAN Change Control.
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