33 channels description

RAN Feature Description Table of Contents

Table of Contents

Chapter 33 Channel Description..............................................................................................33-133.1 Introduction..................................................................................................................33-1

33.1.1 Definition...........................................................................................................33-133.1.2 Purpose.............................................................................................................33-133.1.3 Terms and Abbreviations...................................................................................33-1

33.2 Availability....................................................................................................................33-233.2.1 Involved Network Element.................................................................................33-233.2.2 Software Release..............................................................................................33-2

33.3 Impact..........................................................................................................................33-333.3.1 On the System Performance.............................................................................33-333.3.2 On Other Features.............................................................................................33-3

33.4 Restrictions..................................................................................................................33-333.5 Technical Description...................................................................................................33-3

33.5.1 Channels Configuration Model..........................................................................33-333.5.2 Overview...........................................................................................................33-433.5.3 Logical Channel.................................................................................................33-533.5.4 Transport Channel...........................................................................................33-1833.5.5 Physical Channel.............................................................................................33-2433.5.6 Channel Mapping............................................................................................33-29

33.6 Capabilities................................................................................................................33-3233.7 Implementation..........................................................................................................33-33

33.7.1 Enabling Feature.............................................................................................33-3333.7.2 Reconfiguring Feature.....................................................................................33-3433.7.3 Disabling Feature............................................................................................33-36

33.8 Maintenance Information............................................................................................33-3633.8.1 Alarms.............................................................................................................33-3633.8.2 Counters..........................................................................................................33-36

33.9 References................................................................................................................. 33-36

Huawei Technologies Proprietary

i

RAN Feature Description List of Figures

List of Figures

Figure 33-1 Channels configuration model (1)....................................................................33-3




ii

RAN Feature Description List of Tables

List of Tables

Table 33-1 NEs required for channel description.................................................................33-2

Table 33-2 RAN products and related versions for non-HSDPA channels...........................33-2

Table 33-3 RAN products and related versions for HSDPA channels..................................33-2

Table 33-4 Logical channels................................................................................................33-5

Table 33-5 SIBs and Huawei Usage....................................................................................33-8

Table 33-6 HS-DSCH fields...............................................................................................33-29

Table 33-7 Mapping of Radio Bearers (RB).......................................................................33-30

Table 33-8 Mapping of RBs...............................................................................................33-31

Table 33-9 Mapping of RBs...............................................................................................33-32

Table 33-10 Specifications of common physical channels under full configuration...........33-33

Table 33-11 Modifying PRACH parameters-1....................................................................33-34

Table 33-12 Modifying PRACH parameters-2...................................................................33-34

Table 33-13 Modifying SCCPCH non-Reconfiguration parameters...................................33-35


iii

RAN Feature Description Chapter 33 Channel Description

Chapter 33 Channel Description

33.1 Introduction

33.1.1 Definition

Information transfer between different layers or between peer entities on layer1 is carried by channels. There are three types of channels defined in UTRAN:

Logical Channel: Logical channels provide data transfer between layer 2 and higher layer. Logical channels are mapped to transport channels in MAC layer being part of layer 2.

Transport Channel: Transport channels provide data transfer between layer 2 and layer 1. Transport channels are mapped to physical channels in layer 1.

Physical Channel: Physical channels provide data transfer on radio interface between peers layer1 entity. The physical channels correspond to different radio frame types and contents.

33.1.2 Purpose

The logical channel, transport channel and physical channel are described in the chapter.

33.1.3 Terms and Abbreviations

I. Terms

None.

II. Abbreviations

Abbreviation Full Spelling

16QAM 16 Quadrature Amplitude Modulation

CCTrCH Coded Composite Transport Channel

MAC Medium Access Control

QPSK Quaternary Phase Shift Keying

RLC Radio Link Control

SIB system information block


1


Abbreviation Full Spelling

SIB_POS system information block position

SF Spreading Factor

TFCI Transport Format Combination Indicator

UTRAN UMTS Terrestrial Radio Access Network

33.2 Availability

33.2.1 Involved Network Element

Table 33-1 describes the NEs related with the channels.

Table 33-1 NEs required for channel description

UE NodeB RNC MSC Server MGW SGSN GGSN HLR

√ √ √ - - - - -Note:

–: not required

√: required

33.2.2 Software Release

Table 33-2 RAN products and related versions for non-HSDPA channels

Product Version

RNC BSC6800 V100R001 and later releases

NodeB

DBS3000 V100R001 and later releases

BTS3812A V100R001 and later releases

BTS3812E V100R001 and later releases


2


Table 33-3 RAN products and related versions for HSDPA channels

Product Version

RNC BSC6800 V100R005 and later releases

NodeB

DBS3000 V100R006 and later releases

BTS3812A V100R006 and later releases

BTS3812E V100R006 and later releases

33.3 Impact

33.3.1 On the System Performance

Different physical channels have different characteristics. Therefore, suitable physical channels can be selected according to algorithms to bear services and thus to satisfy the service QoS, and the system load and capacity requirements.

33.3.2 On Other Features

None.

33.4 RestrictionsNone.

33.5 Technical Description

33.5.1 Channels Configuration Model

The configuration model for channels is as show in Figure 33-2, Figure 33-3 and Figure 33-4.


3


TYPRABDYNTF.Class

TYPRABSEMISTATICTF.Class

RAB&SRBClass

RNC

RadioClass

GlobalParaClass

FRC.Class

LOCHPRIO.Class

PCHDYNTF.Class

FACHDYNTF.Class

CellClass

PCH.Class

SCCPCHTFC.Class

FACHLOCH.Class

PICH.Class

PCH.Class

FACHDYNTFS.Class

PCHDYNTFS.Class

RACH.Class

FACH.Class

Figure 33-2 Channels configuration model (1)

SCCPCHTFC.Class CTFC of a SCCPCH

LOCHPRIO.Class logical channel priority

PCH.Class Basic information of a PCH

PICH.Class Basic information of a PICH

FACHLOCH.Class The logical channel mapped to a FACH

FRC.Class puncturing limit

FACHDYNTFS.Class The dynamic TFS of a FACH

PCHDYNTFS.Class The dynamic information of the TFS of a PCH

PCH.Class rate matching attribute



4


RACH.Class

rate matching attribute

Transmission Time Interval

TYPRABDYNTF.Class

FACHDYNTF.Class

Transport Block size

Number of Transport Block

PCHDYNTF.Class

Basic information of a FACH

channel code type

TYPRABSEMISTATICTF.Class

FACH.Class

Coding rate

rate matching attribute

Transmission Time Interval


33.5.2 Overview

Figure 33-5 shows the positions of the three types of channels in the protocol layers.

LogicalChannels

TransportChannels

P HY

L2/MAC

L1

L2/RLC

MA C

RLCRLC

RLCRLC

P HY

MA C

RLCRLC

RLCRLC

PhysicalChannels

Figure 33-5 Positions of the three types of channels in the protocol layers

33.5.3 Logical Channel

I. Overview

The MAC layer provides data transfer services on logical channels. A set of logical channel types is defined for different kinds of data transfer services offered by MAC. The type of the logical channel is defined by the type of information transferred.


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Generally, the logical channels are categorized as follows:

Control Channels (for the transfer of control plane information) Traffic Channels (for the transfer of user plane information)

Table 33-1 describes the logical channels.

Table 33-1 Logical channels

Logical Channel

TypeName Definition Direction Characteristics

Control Channel

BCCHBroadcast Control CHannel

DLCommon channel for broadcasting system information messages.

PCCHPaging Control CHannel

DLCommon channel for transferring paging information.

CCCHCommon Control CHannel

DL/UL

Common channel for control messages. (RRC message and Cell Update)

It is commonly used by RNC and UE before the RRC connection is setup or when accessing a new cell after cell reselection.

DCCHDedicated Control Channel

DL/UL

Dedicated channel for signaling.

Established through RRC connection setup procedure.

Associated with DTCH.

Traffic Channel

CTCHCommon Traffic Channel

DLCommon Channel for user plan data, such as Cell broadcast service.

DTCHDedicated Traffic CHannel

DL/UL

Dedicated channel for user plane data, such as speech and CS/PS data.

Associated with DCCH.

II. Logical Channel Priority

Logical channel priority is used to define the priority of each logical channel. It works when more than one logical channel is mapped to one transport channel or physical channel. Commonly, only DCCH and DTCH need logical channel priority to be set.


6


Logical channel priority is set based on logical channel type and the service carried on. Every service corresponds to a logical channel priority.


7


Parameter Name logical channel priority

Parameter ID

SRB1LOCHPRIO, SRB2LOCHPRIO, SRB3LOCHPRIO, SRB4LOCHPRIO, CSCONVLOCHPRIO, CSSTRLOCHPRIO, PSCONVLOCHPRIO2, PSSTRLOCHPRIO, PSINTTHP1LOCHPRIO, PSINTTHP2LOCHPRIO, PSINTTHP3LOCHPRIO, PSINTTHP4LOCHPRIO, PSINTTHP5LOCHPRIO, PSINTTHP6LOCHPRIO, PSINTTHP7LOCHPRIO, PSINTTHP8LOCHPRIO, PSINTTHP9LOCHPRIO, PSINTTHP10LOCHPRIO, PSINTTHP11LOCHPRIO, PSINTTHP12LOCHPRIO, PSINTTHP13LOCHPRIO, PSINTTHP14LOCHPRIO, PSINTTHP15LOCHPRIO, PSBKGLOCHPRIO;

GUI Range 1-8

Physical Range& Unit 1-8

Default Value

SRB1LOCHPRIO=1, SRB2LOCHPRIO=1, SRB3LOCHPRIO=2, SRB4LOCHPRIO=2, CSCONVLOCHPRIO=4, CSSTRLOCHPRIO=4, PSCONVLOCHPRIO=4, PSSTRLOCHPRIO=4, PSINTTHP1LOCHPRIO=4, PSINTTHP2LOCHPRIO=5, PSINTTHP3LOCHPRIO=6, PSINTTHP4LOCHPRIO=7, PSINTTHP5LOCHPRIO=7, PSINTTHP6LOCHPRIO=7, PSINTTHP7LOCHPRIO=7, PSINTTHP8LOCHPRIO=7, PSINTTHP9LOCHPRIO=7, PSINTTHP10LOCHPRIO=7, PSINTTHP11LOCHPRIO=7, PSINTTHP12LOCHPRIO=7, PSINTTHP13LOCHPRIO=7, PSINTTHP14LOCHPRIO=7, PSINTTHP15LOCHPRIO=7, PSBKGLOCHPRIO=8;

Optional / Mandatory Mandatory

MML Command SET LOCHPRIO


8


Description:

Logical channel priority for each SRB and service. 1 is the highest.

Configuration Rule and Restriction:

To improve the user experience, configure the logical channel priority according to the following rule:

signaling > CS service > PS Interactive > PS background

III. BCCH

BCCH carries system information block (SIB). The system information elements are broadcast in SIBs. An SIB groups together system information elements of the same nature. Different SIBs have different characteristics, for example, their repetition rate and the requirements on UEs to re-read the SIBs.

Table 33-2 describes the SIB content briefly and Huawei Usage.

Table 33-2 SIBs and Huawei Usage

System Information

Block

Area Scope

Content Usage

Master information block

Cell SIB scheduling information Y

Scheduling block 1

Cell SIB scheduling information Y

Scheduling block 2

Cell SIB scheduling information. Y

SIB1 PLMNNAS information and timers used by UE in connected mode and idle mode.

Y

SIB2 Cell URA Id. Y

SIB3 CellParameters of cell selection and reselection in idle mode.

Y

SIB4 CellParameters of cell selection and reselection in connected mode.

Y


9


System Information

Block

Area Scope

Content Usage

SIB5 CellParameters of common physical channel for UE in idle mode. (PRACH, AICH, PICH, S-CCPCH)

Y

SIB6 CellParameters of common physical channel for UE in connected mode.

Y

SIB7 Cell UL interference, Dynamical insistence level Y

SIB11 CellMeasurement control information for UE in idle mode.

Y

SIB12 CellMeasurement control information for UE in connected mode.

Y

SIB13 Cell ANSI-41 system information N

SIB14 Cell TDD physical channels parameters N

SIB15Cell/PLMN

Location services N

SIB16Equivalent PLMN

Parameters to be stored by UE for use during handover to UTRAN.

N

SIB17 CellTDD fast changing parameters for shared channels in connected mode.

N

SIB18 Cell PLMN ID of neighboring cells Y

The system information is organized as a tree. A master information block gives references and scheduling information to a number of system information blocks in a cell. The system information blocks contain the actual system information.

Scheduling of system information blocks is performed by the RRC layer in UTRAN. RRC can calculate the repetition period and position of each SIB segment for every SIB automatically based on its importance.

An example of SIB scheduling result:


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IV. SIB Content and Default Values

SIB1 Content

Information Element Default Value

CN information elementsCN common GSM MAP NAS system information Octe1:RAC, Octe2:NMOCN domain system informationCN domain identity PSCHOICE CN Type GSM MAPGSM-MAP NAS system information Octe1:RAC, Octe2:NMOCN domain specific DRX cycle length coefficient 6CN domain identity CSCHOICE CN Type GSM-MAPGSM-MAP NAS system information Octe1:RAC, Octe2:NMO CN domain specific DRX cycle length coefficient 6 UE Timers and constants in idle mode T300 2000 ms N300 3 T312 6s N312 1 UE Timers and constants in connected mode T301 Not used N301 Not used T302 2000 ms N302 3 T304 2000 ms N304 3 T305 10 minutes T307 30s T308 40 ms


11



N308 1 T309 5s T310 Not used N310 Not used T311 Not used T312 6s N312 1 T313 3s N313 50 T314 20s T315 30s N315 1 T316 30s T317 0s

SIB2 Content


URA identity list URA identity Decided by network plan.

SIB3 Content

Information Element Default Value SIB4 indicator FALSE

Cell identity

Cell selection and re-selection info

Mapping info Not Present Cell selection and reselection quality measure CPICH Ec/N0

CHOICE mode FDD Sintrasearch 5 (10 dB) Sintersearch 4 (8 dB) SsearchHCS 0(0 dB) RAT List This parameter is configurable RAT identifier GSM Ssearch,RAT 2(4 dB) SHCS,RAT Not Present Slimit,SearchRAT 0 (0dB) Qqualmin -18 Qrxlevmin -58, (-115 dBm)

Qhyst1s 2 (4 dB)


12


Qhyst2s 1 (2 dB)

Treselections 1 seconds HCS Serving cell information Not Present Maximum allowed UL TX power 24 dBm

Cell Access Restriction Cell barred Not barred Intra-frequency cell re-selection indicator Not present Tbarred Not present Cell Reserved for operator use Not reserved Cell Reservation Extension Not reserved

Access Class Barred List Access Class Barred0 Not barred Access Class Barred1 Not barred Access Class Barred2 Not barred Access Class Barred3 Not barred Access Class Barred4 Not barred Access Class Barred5 Not barred Access Class Barred6 Not barred Access Class Barred7 Not barred Access Class Barred8 Not barred Access Class Barred9 Not barred Access Class Barred10 Not barred Access Class Barred11 Not barred Access Class Barred12 Not barred Access Class Barred13 Not barred Access Class Barred14 Not barred Access Class Barred15 Not barred Domain Specific Access Restriction Not present Domain Specific Access Restriction For Shared Not present

SIB5 Content (FDD)


SIB6 indicator FALSE PICH Power offset -7 dB CHOICE Mode FDD AICH Power offset -6 dB Primary CCPCH info TX Diversity indicator FALSE PRACH system information list PRACH system information PRACH info CHOICE mode FDD Available Signature '0000 0000 1111 1111'B Available SF 32


13



Preamble scrambling code number 0 Puncturing Limit 1.00 Available Sub Channel number '1111 1111 1111'B Transport channel Identity 1 RACH TFS CHOICE Transport channel type Common transport channels Dynamic Transport format information RLC size 168 Number of TB and TTI List Number of Transport blocks 1 CHOICE Mode FDD CHOICE Logical channel List Configured RLC size 360 Number of TB and TTI List Number of Transport blocks 1 CHOICE Mode FDD CHOICE Logical channel List Configured Semi-static Transport Format information Transmission time interval 20 ms Type of channel coding Convolutional Coding Rate 1/2 Rate matching attribute 1 CRC size 16 RACH TFCS CHOICE TFCI signaling Normal TFCI Field 1 information CHOICE TFCS representation Complete reconfiguration TFCS complete reconfiguration CHOICE CTFC Size 1 bit CTFC information 0 Power offset information CHOICE Gain Factors Signaled Gain Factor CHOICE mode FDD Gain factor ßc 13 Gain factor ßd 15 CHOICE Mode FDD Power offset Pp-m -3 dB CTFC information 1 Power offset information CHOICE Gain Factors Signaled Gain Factor CHOICE mode FDD Gain factor ßc 10 Gain factor ßd 15 CHOICE Mode FDD


14



Power offset Pp-m -2 dB PRACH partitioning Access Service Class ASC Setting CHOICE mode FDD Available signature Start Index 0 (ASC#0) Available signature End Index 7 (ASC#0) Assigned Sub-Channel Number '1111'B ASC Setting CHOICE mode FDD Available signature Start Index 0 (ASC#1) Available signature End Index 7 (ASC#1) Assigned Sub-Channel Number '1111'B ASC Setting Not Present ASC Setting Not Present ASC Setting Not Present ASC Setting Not Present ASC Setting Not Present ASC Setting Not Present AC-to-ASC mapping table AC-to-ASC mapping 0 (AC0-9) AC-to-ASC mapping 0 (AC10) AC-to-ASC mapping 0 (AC11) AC-to-ASC mapping 0 (AC12) AC-to-ASC mapping 0 (AC13) AC-to-ASC mapping 0 (AC14) AC-to-ASC mapping 0 (AC15) PRACH Basic Parameter CHOICE mode FDD Primary CPICH TX power 33 dBm Constant value -20 dB PRACH power offset Power Ramp Step 2 dB Preamble Retrans Max 20 RACH transmission parameters Mmax 8 NB01min 0 slot NB01max 0 slot AICH info Channelization code 3 STTD indicator FALSE AICH transmission timing 1

Secondary CCPCH system information Secondary CCPCH info


15



CHOICE mode FDD Secondary scrambling code Not Present STTD indicator FALSE Spreading factor 64 Code number 1 Pilot symbol existence FALSE TFCI existence TRUE Fixed or Flexible position Flexible Timing offset 0 TFCS (This IE is repeated for TFC CHOICE TFCI signaling Normal TFCI Field 1 information CHOICE TFCS representation Complete reconfiguration TFCS complete reconfiguration CHOICE CTFC Size 5 bit CTFC information 0 Power offset information Not Present CTFC information 1 Power offset information Not Present CTFC information 2 Power offset information Not Present CTFC information 3 Power offset information Not Present CTFC information 4 Power offset information Not Present CTFC information 5 Power offset information Not Present CTFC information 6 Power offset information Not Present CTFC information 8 Power offset information Not Present FACH/PCH information TFS (PCH) CHOICE Transport channel type Common transport channels Dynamic Transport format information RLC Size 240 Number of TB and TTI List Number of Transport blocks 0 Number of Transport blocks 1 CHOICE Logical channel List ALL Semi-static Transport Format information Transmission time interval 10 ms Type of channel coding Convolutional Coding Rate 1/2


16



Rate matching attribute 230 CRC size 16 bit Transport channel Identity 3 (for PCH) CTCH indicator FALSE TFS (FACH) CHOICE Transport channel type Common transport channels Dynamic Transport format information RLC Size 168 Number of TB and TTI List Number of Transport blocks 0 Number of Transport blocks 1 Number of Transport blocks 2 CHOICE Logical channel List ALL Semi-static Transport Format information Transmission time interval 10 ms Type of channel coding Convolutional Coding Rate 1/2 Rate matching attribute 220 CRC size 16 bit Transport channel Identity 4 (for FACH) CTCH indicator FALSE TFS (FACH) CHOICE Transport channel type Common transport channels Dynamic Transport format information RLC Size 360 Number of TB and TTI List Number of Transport blocks 0 Number of Transport blocks 1 CHOICE Logical channel List ALL Semi-static Transport Format information Transmission time interval 10 ms Type of channel coding Turbo Rate matching attribute 160 CRC size 16bit Transport channel Identity 5 (for FACH) CTCH indicator FALSE PICH info CHOICE mode FDD Channelization code 2 Number of PI per frame 36 STTD indicator FALSE CBS DRX Level 1 information Not Present


17


SIB7 Content


CHOICE Mode FDD

UL interference Measured value by NodeB.

SIB11 Content


SIB12 indicator False

FACH measurement occasion info Not Present

Measurement control system information

Use of HCS Not used

Cell selection and reselection quality measure

CPICH Ec/N0

Intra-frequency measurement system information

Intra-frequency measurement identity RNC assignment

Intra-frequency cell info list

CHOICE intra-frequency cell removal

Not present

(This IE shall be ignored by the UE for SIB11)

New intra-frequency cells

Intra-frequency cell id 1

Cell info

Cell individual offset 0 dB

Reference time difference to cell Not Present

Read SFN indicator TRUE

CHOICE mode FDD

Primary CPICH info


18


Primary scrambling codeConfiguration based on real scenario

Primary CPICH TX power 330 (33dBm)

TX Diversity indicator FALSE

Cell Selection and Re-selection info Configuration based on real scenario

Intra-frequency measurement quantity CPICH Ec/No

Filter coefficient D3 (3)

CHOICE mode FDD

Measurement quantity CPICH Ec/N0

Intra-frequency reporting quantity for RACH Reporting

Not Present

Maximum number of reported cells on RACH

current cell+2 best neighbours

Reporting information for state CELL_DCH Not Present

Inter-frequency measurement system information

Inter-frequency cell info list

CHOICE Inter-frequency cell removal

Not present

(This IE shall be ignored by the UE for SIB11)

New inter-frequency cells

Inter frequency cell id 4

Frequency info

CHOICE mode FDD

UARFCN uplink(Nu)Configuration based on real scenario

UARFCN downlink(Nd)Configuration based on real scenario

Cell info


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Cell individual offset 0(0dB)

Reference time difference to cell Not present

Read SFN indicator FALSE

CHOICE mode FDD

Primary CPICH info

Primary scrambling codeConfiguration based on real scenario

Primary CPICH Tx power 330 (33dBm)

TX Diversity Indicator FALSE

Cell Selection and Re-selection InfoConfiguration based on real scenario

Cell for measurement Not present

Inter-RAT measurement system information Not Present

Inter-RAT measurement system information

Inter-RAT cell info list

CHOICE Inter-RAT cell removal

New inter-RAT cells

Inter-RAT cell idConfiguration based on real scenario

CHOICE Radio Access Technology GSM

GSM

Cell individual offset 0 (0dB)

Cell selection and re-selection info Not present

BSICConfiguration based on real scenario

Base transceiver Station Identity Code (BSIC)

Configuration based on real scenario

Band indicator DCS1800 band used


20


BCCH ARFCNConfiguration based on real scenario

Cell for measurementConfiguration based on real scenario

33.5.4 Transport Channel

The physical layer offers information transfer services to MAC and higher layers by transport channel. Generally, the transport channels are categorized as follows:

Common transport channels (where there is a need for inband identification of the UEs when particular UEs are addressed)

Dedicated transport channels (where the UEs are identified by the physical channel, for example, code and frequency for FDD and code, time slot and frequency for TDD).

Transport Channel


Common transport channels

BCHBroadcast Channel

DLA downlink channel used for broadcast of system information into an entire cell

PCHPaging Channel

DL

A downlink channel used for broadcast of control information into an entire cell allowing efficient UE sleep mode procedures. Currently identified information types are paging and notification. Another use could be UTRAN notification of change of BCCH information.

RACH Random Access Channel

UL A contention based uplink channel used for transmission of relatively small amounts of data, e.g. for initial access or non-real-time dedicated control or traffic data.


21


Transport Channel


FACHForward Access Channel

DL

Common downlink channel without closed-loop power control used for transmission of relatively small amount of data.

HS-DSCH

High Speed Downlink Shared Channel

DLA downlink channel shared between UEs. It always afford high speed data transferring.

Dedicated transport channels

DCHDedicated Channel

DL/ULA channel dedicated to one UE.

To each transport channel, there is an associated Transport Format (for transport channels with a fixed or slow changing rate) or an associated Transport Format Set (for transport channels with fast changing rate). A Transport Format is defined as a combination of encodings, interleaving, bit rate and mapping onto physical channels (see 33.5.5 for details). A Transport Format Set is a set of Transport Formats. E.g., a variable rate DCH has a Transport Format Set (one Transport Format for each rate), whereas a fixed rate DCH has a single Transport Format.

See definitions as follows:

Transport Block: This is the basic unit exchanged between L1 and MAC, for L1 processing.

Transport Block Set: This is defined as a set of Transport Blocks, which are exchanged between L1 and MAC at the same time instance using the same transport channel.

Transport Format: This is defined as a format offered by L1 to MAC (and vice versa) for the delivery of a Transport Block Set during a Transmission Time Interval on a Transport Channel. The Transport Format constitutes of two parts – one dynamic part and one semi-static part.

Attributes of the dynamic part are:

- Transport Block Size

- Transport Block Number

Attributes of the semi-static part are:


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- Transmission Time Interval

- Channel code type

- Coding rate

- Rate matching attribute

- Puncturing limit

- Size of CRC

Transport Format Combination: This is defined as an authorized combination of the combination of currently valid Transport Formats that can be submitted simultaneously to the layer 1 for transmission on a Coded Composite Transport Channel of a UE.

Figure 33-6 shows an example where Transport Block Sets, at certain time instances, are exchanged between MAC and L1 via three parallel transport channels. Each Transport Block Set consists of a number of Transport Blocks. The Transmission Time Interval, i.e. the time between consecutive deliveries of data between MAC and L1, is also illustrated.

Transmission Time Interval (TTI)

Time

DCH 1

DCH 2

DCH 3Transport Block

Transport Block

Transport Block Transport Block Transport Block

Transport Block

Transport Block

Transport Block

Transport Block Transport Block Transport Block

Transport Block

Transport Block

Transport Block

Transport Block

Transport Block

Transport Block



Figure 33-6 Exchange of data between MAC and L1


23


Parameter name Transport Block size

Parameter ID TBsize

GUI range 0–4992

Physical range& unit 0–4992 (bit)

Default value Based on specific services


MML command ADD/MOD TYPRABDYNTF

Description:

This is defined as the number of bits in a Transport Block.

Parameter name Number of Transport Block

Parameter ID TbNumber

GUI range 0–256

Physical range& unit 0–256



MML command ADD/RMV TYPRABDYNTF, ADD FACHDYNTF, ADD PCHDYNTF

Description:

This is defined as the number of Transport Block in a Transmission Time Interval.


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Parameter name Transmission Time Interval

Parameter ID TTI

GUI range D10, D20, D40, D80

Physical range& unit 10, 20, 40, 80 (ms)



MML command ADD RACH, ADD FACH, ADD/MOD TYPRABSEMISTATICTF

Description:

This is defined as the inter-arrival time of Transport Block Sets, and is equal to the periodicity at which a Transport Block Set is transferred by the physical layer on the radio interface.

Parameter name channel code type

Parameter ID ChCodingType

GUI range NO_CODING, CONVOLUTIONAL, TURBO

Physical range& unit None



MML command ADD/MOD TYPRABSEMISTATICTF

Description:

A type of error protection. Channel coding increase the information redundancy of the bits to be transmitted on transport channel. It greatly reduces the error bits caused by various noise and interference during digital information transmission.


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Parameter name Coding rate

Parameter ID CodingRate

GUI range D1/2, D1/3

Physical range& unit 1/2, 1/3


Optional / Mandatory Mandatory if channel code type is

CONVOLUTIONAL

None if channel code type is TURBO

MML command ADD/MOD TYPRABSEMISTATICTF

Description:

Ratio of the number of input bits to the number of output bits, of a channel encoder.

Parameter name rate matching attribute

Parameter ID RateMathingAttr, DlRateMathingAttr, UlRateMathingAttr

GUI range 1–256

Physical range& unit None



MML command ADD FACH/PCH/RACH, ADD/MOD TYPRABSEMISTATICTF

Description:

It represents the weight of processing (repeating or puncturing) data bits on the corresponding transport channel during rate matching. This parameter is valid in the case of multiplexing of transport channel, that is, when multiple transport channels are combined into a CCTrCH.


26


Parameter name puncturing limit

Parameter ID DlDpchPl, UlDpchPl

GUI range 10–25

Physical range& unit 0.4–1; step: 0.04

Default value DlDpchPl = 16, UlDpchPl = 17.


MML command SET FRC

Description:

The puncturing limit used in the spreading factor selection algorithm for DL/UL DPDCH.

Parameter name CRC size

Parameter ID CRCsize

GUI range D0, D8, D12, D16, D24.

Physical range& unit 0, 8, 12, 16, 24.



MML command ADD FACH/PCH/RACH, ADD/MOD TYPRABSEMISTATICTF

Description:

Indicating whether to perform CRC check on the corresponding transport channel and indicating the size of the CRC bits attached to a transport block (TB).

Caution:

It needs to deactivate the cell before you change the value of Transport Block Number, Transmission Time Interval, channel code type, coding rate, rate matching attribute, size of CRC for FACH, PCH or RACH.


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33.5.5 Physical Channel

Physical channels are defined by a specific carrier frequency, scrambling code, channelization code (optional), time start & stop (giving a duration) and, on the uplink, relative phase (0 or /2). Time durations are defined by start and stop instants, measured in integer multiples of chips. Suitable multiples of chips also used in specification are:

Radio frame: A radio frame is a processing duration which consists of 15 slots. The length of a radio frame corresponds to 38400 chips.

Slot: A slot is a duration which consists of fields containing bits. The length of a slot corresponds to 2560 chips.

Sub-frame:A sub-frame is the basic time interval for HS-DSCH transmission and HS-DSCH related signaling at the physical layer. The length of a sub-frame corresponds to 3 slots (7680 chips).

Transport channels are mapped to physical channels. Within the physical layer itself the exact mapping is from a composite coded transport channel (CCTrCH) to the data part of a physical channel. In addition to data parts there also exist channel control parts and physical signals.

Physical signals are entities with the same basic on-air attributes as physical channels but do not have transport channels or indicators mapped to them. Physical signals may be associated with physical channels in order to support the function of physical channels, such as PRACH Preamble part.

The following physical channels are supported by Huawei:

Transport channel

typeName Definition Direction Characteristics

Common Physical channels

CPICHCommon Pilot Channel

DL

The CPICH is a fixed rate (30 kbps, SF=256) downlink physical channel that carries a pre-defined bit sequence

The CPICH has a wide range of applications such as cell identification, synchronization, power control, and handover

SCH Synchronization Channel

DL Downlink signal used for cell search.


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Transport channel


P-CCPCHPrimary Common Control Physical Channel

DL

The Primary CCPCH is a fixed rate (30 kbps, SF=256) downlink physical channels used to carry the BCH transport channel.

S-CCPCHSecondary Common Control Physical Channel

DLThe Secondary CCPCH is used to carry the FACH and PCH.

PRACHPhysical Random Access Channel

UL

The random-access transmission is based on a Slotted ALOHA approach with fast acquisition indication.

AICHAcquisition Indicator Channel

DL

The Acquisition Indicator channel (AICH) is a fixed rate (SF=256) physical channel used to carry Acquisition Indicators (AI). AI is physical signal.

PICHPaging Indicator Channel

DL

The Paging Indicator Channel (PICH) is a fixed rate (SF=256) physical channel used to carry the paging indicators

The PICH is always associated with an S-CCPCH to which a PCH transport channel is mapped

HS-PDSCH High Speed Physical Downlink Shared Channel

DL The High Speed Physical Downlink Shared Channel (HS- PDSCH) is used to carry the High Speed Downlink Shared Channel (HS-DSCH). Its highest rate for data transfer is 14.4Mbps.


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Transport channel


HS-SCCHShared Control Channel

DL

The HS-SCCH is a fixed rate (60 kbps, SF=128) downlink physical channel used to carry downlink signaling related to HS-DSCH transmission.

Dedicated physical channels

DPCHDedicated physical channels

DL/ULPhysical channel used by one UE.

HS-DPCCHHigh Speed Dedicated Physical Control Channel

UL

The HS-DPCCH carries uplink feedback signaling related to downlink HS-DSCH transmission.

See descriptions of the physical channels as follows. For more details, refer to 3GPP TS25.211.

I. Dedicated uplink Physical Channels

Dedicated uplink physical channels include uplink Dedicated Physical Data Channel (UL DPDCH) and uplink Dedicated Physical Control Channel (UL DPCCH).

The uplink DPDCH is used to carry the DCH transport channel. There may be zero, one, or several uplink DPDCHs on each radio link.

The uplink DPCCH is used to carry control information generated at Layer 1. The Layer 1 control information consists of known pilot bits to support channel estimation for coherent detection, transmit power-control (TPC) commands, feedback information (FBI), and an optional transport-format combination indicator (TFCI). The transport-format combination indicator informs the receiver about the instantaneous transport format combination of the transport channels mapped to the simultaneously transmitted uplink DPDCH radio frame. There is one and only one uplink DPCCH on each radio link.

Figure 33-7 shows the frame structure of the uplink DPDCH and the uplink DPCCH. Each radio frame of length 10 ms is split into 15 slots, each of length T slot = 2560 chips, corresponding to one power-control period. The DPDCH and DPCCH are always frame aligned with each other.


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DataNdata1 bits

Slot # 0 Slot # i Slot # 14

Tslot = 2560 chips, 10 bits

1 radio frame: Tf = 10 ms

DPDCH

DPCCH

DataNdata bits

Tslot = 2560 chips, Ndata = M * 10 * 2K bit/s ( k=0... 6 )

PilotNpilot bits

TFCINTFCI bits

FBINFBI bits

FBINTPC bits

Slot # 1

Figure 33-7 Frame structure for uplink DPDCH/DPCCH

The parameter k in Figure 33-7 determines the number of bits per uplink DPDCH slot. It is related to the spreading factor SF of the DPDCH as SF = 256/2k. The DPDCH spreading factor may range from 256 down to 4. The spreading factor of the uplink DPCCH is always equal to 256, i.e. there are 10 bits per uplink DPCCH slot.

II. Dedicated Downlink Physical Channels

Within one downlink DPCH, dedicated data generated at Layer 2 and above, i.e. the dedicated transport channel (DCH), is transmitted in time-multiplex with control information generated at Layer 1 (known pilot bits, TPC commands, and an optional TFCI). The downlink DPCH can thus be seen as a time multiplex of a downlink DPDCH and a downlink DPCCH.

Figure 33-8 shows the frame structure of the downlink DPCH. Each frame of length 10 ms is split into 15 slots, each of length Tslot = 2560 chips, corresponding to one power-control period.


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DataNdata1 bits

Slot # 0 Slot # i Slot # 14

1 radio frame: Tf = 10 ms

DPDCH

Tslot = 2560 chips, 10 * 2K bit/s ( k=0... 7 )

Data 1Ndata 1 bits

TFCINTFCI bits

Data 2Ndata 2 bits

PilotNPilot bits

Slot # 1

TPCNTPC bits

DPCCH DPDCH DPCCH

Figure 33-8 Frame structure for downlink DPCH

The parameter k in Figure 33-8 determines the total number of bits per downlink DPCH slot. It is related to the spreading factor SF of the physical channel as SF = 512/2k. The spreading factor may thus range from 512 down to 4.

The exact number of bits of the different downlink DPCH fields (Npilot, NTPC, NTFCI, Ndata1

and Ndata2) corresponds to slot formats. The slot format to be uses is configured by higher layers and can also be reconfigured by higher layers.

III. High Speed Physical Downlink Shared Channel (HS-PDSCH)

A HS-PDSCH corresponds to one channelization code of fixed spreading factor SF=16 from the set of channelization codes reserved for HS-DSCH transmission. Multi-code transmission is allowed, which translates to UE being assigned multiple channelization codes in the same HS-PDSCH subframe, depending on its UE capability.

The subframe and slot structure of HS-PDSCH are shown in Figure 33-9.

DataNdata1 bits

Slot # 0 Slot # 1 Slot # 2

Tslot = 2560 chips, M * 10 * 2K bit/s ( k=4 )

1 subframe: Tf = 2 ms

Figure 33-9 Sub-frame structure for the HS-PDSCH


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An HS-PDSCH may use QPSK or 16QAM modulation symbols. In Figure 33-9, M is the number of bits per modulation symbols i.e. M=2 for QPSK and M=4 for 16QAM. The slot formats are shown in Table 33-1.

Table 33-1 HS-DSCH fields

Slot format #iChannel Bit Rate (kbps)

Channel Symbol

Rate (ksps)SF

Bits/ HS-DSCH

subframe

Bits/ Slot

Ndata

0(QPSK) 480 240 16 960 320 320

1(16QAM) 960 240 16 1920 640 640

All relevant Layer 1 information is transmitted in the associated HS-SCCH i.e. the HS-PDSCH does not carry any Layer 1 information.

IV. High Speed Dedicated Physical Control Channel

Figure 33-10 illustrates the frame structure of the HS-DPCCH. The HS-DPCCH carries uplink feedback signaling related to downlink HS-DSCH transmission. The HS-DSCH-related feedback signaling consists of Hybrid-ARQ Acknowledgement (HARQ-ACK) and Channel-Quality Indication (CQI). Each sub frame of length 2 ms (3*2560 chips) consists of 3 slots, each of length 2560 chips. The HARQ-ACK is carried in the first slot of the HS-DPCCH sub-frame. The CQI is carried in the second and third slot of a HS-DPCCH sub-frame. There is at most one HS-DPCCH on each radio link. The HS-DPCCH can only exist together with an uplink DPCCH.

HARQ-ACK

Subframe # 0 Subframe # i Subframe # 4

One HS-DPCCH subframe ( 2ms )

One radio frame : Tf = 10 ms

CQI

Tslot = 2560 chips 2 x Tslot = 5120 chips

Figure 33-10 Frame structure for uplink HS-DPCCH

The spreading factor of the HS-DPCCH is 256 i.e. there are 10 bits per uplink HS-DPCCH slot.


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33.5.6 Channel Mapping

I. Channel Mapping Relation

The rules for the channel mapping are:

Logical channels are mapped to transport channels Transport channels are mapped to physical channels The mapping between some transport channels and logical channels are not

fixed. One transport channel can be mapped to only one physical channel.

Figure 33-11 shows the mapping between the channels defined by protocols.

PCCH CCCH CTCH DCCH DTCHBCCH

PCH RACH FACH HS-DSCH DCHBCH

Logicalchannel

Transportchannel

PRACH S-CCPCH HS-PDSCH DPDCHP-CCPCH

SCH AICH PICH DPCCHCPICH

HS-DPCCH HS-SCCH

Physicalchannel

Figure 33-11 Channel mapping (seen from UTRAN side)

In Figure 33-11, red arrows are for the UL data transmission and the black arrows are for the DL data transmission.

II. Typical Common Channel Configuration

Among all the common channels, the SCCPCH and PRACH are used for transferring data. The recommended configurations of the two channels are as follows:

The default configuration of the SCCPCH

The cell must be configured with the PCH and the FACH. By Huawei, a cell is by default configured with one SCCPCH. The SCCPCH bears one PCH, one FACH#0 that bears signaling, and one FACH#1 that bears service data.


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Table 33-1 Mapping of Radio Bearers (RB)

MessageRadio

BearersLogical Channel

Transport Channel

Physical Channel

Paging info - PCCH PCH

SCCPCHSignaling

SRB0 CCCH

FACH#0SRB1, SRB2,SRB3, SRB4

DCCH

Traffic data TRB DTCH FACH#1

Figure 33-12 shows the mapping between the above-mentioned channels.

FACH #0

S-CCPCH

FACH #1

PCCH

PCH

TRBDTCH

SRB 0CCCH

SRB 1~ 4DCCH

Figure 33-12 SCCPCH channel mapping

The default configuration of the PRACH

One PRACH can bear only one RACH that bears all UL signaling and service data.

Table 33-1 Mapping of RBs

MessageRadio

BearersLogical Channel

Transport Channel

Physical Channel

Signaling

SRB0 CCCH

RACH PRACHSRB1, SRB2,SRB3, SRB4

DCCH

Traffic data TRB DTCH


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RACH

SRB 1~ 4DCCH

TRBDTCH

SRB 0CCCH

PRACH

Figure 33-13 PRACH channel mapping

III. Typical Dedicated Channel Configuration

For dedicated channels, the RBs that bear signaling and the RBs that bear service data are separately mapped to different transport channels.

Table 33-1 Mapping of RBs

Message Radio BearersLogical Channel

Transport Channel

Physical Channel

SignalingSRB1, SRB2,SRB3, SRB4

DCCH DCH #0DPCH

Traffic data TRB DTCH DCH #1

DCH #0 DCH #1

DPCH

SRB 1~ 4DCCH

TRBDTCH

Figure 33-14 DPCH channel mapping


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33.6 CapabilitiesTable 33-1 describes the specifications of the common physical channels that Huawei RAN products support.

Table 33-1 Specifications of common physical channels under full configuration

Channel Quantity Description

PSCH 1 One cell has only one PSCH.

SSCH 1 One cell has only one SSCH

PCPICH 1 One cell has only one CPICH

PCCPCH 1 One cell has only one PCCPCH

PRACH 1According to the protocol, a maximum of 16 PRACHs can be configured.

AICH 1 One AICH corresponds to one PRACH.

SCCPCH 4According to the protocol, a maximum of 16 SCCPCHs can be configured.

PICH 1According to the protocol, a maximum of 8 PCHs can be configured. One PICH corresponds to one PCH.

33.7 Implementation

33.7.1 Enabling Feature

The dedicated channels are set up automatically when the services are set up. The common channels need be set up before a cell is activated.

To set up common channels, perform the following steps:

Execute the ADD LOCELL command to set up a logical cell. Execute the ADD QUICKCELLSETUP command to set up the cell quickly. Execute the ACT CELL command to activate the cell.

The common channels set up by default after the three commands are executed are as follows:

The ID of SCCPCH #1 is 8. The transport channel ID of PCH is 3, that of the FACH bearing signaling is 4, and that of the FACH bearing services is 5.

One PRACH which bears one RACH One PICH


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One AICH One PCCPCH which bears one BCH One PSCH One SSCH One PCPICH.

For the setup of the HSDPA channel, refer to the chapter of HSDPA.

33.7.2 Reconfiguring Feature

I. Reconfiguring the Transmit Power of CPICH, PSCH, SSCH and BCH

Execute the MOD CELL command.

II. Reconfiguring PRACH Parameters

As described in Table 33-2, execute the commands to modify the corresponding parameters.

Table 33-2 Modifying PRACH parameters-1

Function Command

Modify PRACH parameters over UU interface MOD PRACHUUPARAS

Modify the available access resources of an Access Service Class (ASC) of a specified PRACH

MOD PRACHASC

Modify the Access Class to Access Service Class (AC-ASC) mapping information of a PRACH

MOD PRACHACTOASCMAP

If a cell has only one PRACH, perform the following steps to modify the parameters as described in Table 33-3.

1) If the cell is in service, execute the HO CELL command to forcibly hand over the UEs in the cell to a neighboring cell.

2) If the cell is activated, execute the DEA CELL command to deactivate the cell.3) If the PRACH is activated, execute the DEA PRACH command to deactivate the

PRACH.4) As described in Table 33-3, execute the commands to modify the corresponding

parameters.


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Table 33-3 Modifying PRACH parameters-2

Function Command

Remove the Transport Format Combination (TFC) information from a PRACH or add the TFC information to a PRACH

RMV/ADD PRACHTFC

Remove the slot format information from a PRACH or add the slot format information to a PRACH

RMV/ADD PRACHSLOTFORMAT

Modify RACH transmission parameters including the random back-off lower limit, the random back-off upper limit, and max preamble loop

MOD RACH

Modify the basic information of a RACHRMV/ADD RACH

ADD RACHDYNTFS

Remove the dynamic information of the Transport Format Set (TFS) from an RACH or add the dynamic information of the TFS to an RACH

RMV/ADD RACHDYNTFS

Remove and AICH or add an AICH RMV/ADD AICH

5) Execute the ACT PRACH command to activate the PRACH.6) Execute the ACT CELL command to activate the cell.

III. Modifying SCCPCH Reconfiguration Parameters

To reconfigure the SCCPCH, perform the following information.

1) Execute the LST FACH or the LST PCH command to list the configuration information of the SCCPCH to be reconfigured.

Execute the MOD SCCPCH command to reconfigure the SCCPCH parameters.

IV. Modifying SCCPCH Non-Reconfiguring Parameters

If a cell is in service, and the cell has only one SCCPCH or the cell has two SCCPCHs and the SCCPCH that has the smaller channel ID needs be reconfigured, execute the HO CELL command to forcibly hand over UEs in the cell to a neighboring cell. Then execute the DEA CELL command to deactivate the cell. If there is no such requirement, go directly to step 2.

If the SCCPCH is activated, execute the DEA SCCPCH command to deactivate the SCCPCH.

As described in Table 33-4, execute the commands to modify corresponding parameters.


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Table 33-4 Modifying SCCPCH non-Reconfiguration parameters

Parameters Command

CTFC of a SCCPCH RMV/ADD SCCPCHTFC

Basic information of a FACH RMV/ADD FACH

The dynamic TFS of a FACH RMV/ADD FACHDYNTFS

The logical channel mapped to a FACH. RMV/ADD FACHLOCH

Basic information of a PCH RMV/ADD PCH

The dynamic information of the TFS of a PCH RMV/ADD PCHDYNTFS

Basic information of a PICH RMV/ADD PICH

Execute the ACT SCCPCH command to activate the SCCPCH. Execute the ACT CELL command to activate the cell.

33.7.3 Disabling Feature

I. Removing PRACH

1) Execute the LST PRACH command to list the configuration information of a PRACH.

2) If the cell is in service and the PRACH is expected to be removed when the cell is deactivated, execute the HO CELL command to forcibly hand over UEs in this cell to a neighboring cell. Then execute the DEA CELL command to deactivate the cell. If there is no such requirement, skip this step and go directly to step 3.

3) Execute the RMV PRACH command to remove one PRACH.4) Execute the ACT CELL command to activate the cell.

II. Removing SCCPCH

1) Execute the LST SCCPCH command to list the configuration information of a SCCPCH.

2) If the cell is in service and the SCCPCH is expected to be removed when the cell is deactivated, execute the HO CELL command to forcibly hand over UEs in this cell to a neighboring cell. Then execute the DEA CELL command to deactivate the cell. If there is no such requirement, skip this step and go directly to step 3.

3) Execute the LST FACH command to query if the FACH bears the Common Traffic Channel (CTCH).


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4) If the FACH bears the CTCH, execute the DEA CELLCBS command to deactivate the CBS of the cell and execute the RMV CTCH command to remove the CTCH.

5) Execute the RMV SCCPCH command to remove the SCCPCH. If the cell is activated and there are 2 SCCPCHs in the cell, only the SCCPCH that has the bigger channel ID can be removed. If the cell is activated and only one SCCPCH exists, the SCCPCH can’t be removed.

6) Execute the ACT CELL command to activate the cell.

33.8 Maintenance Information

33.8.1 Alarms

None.

33.8.2 Counters

None.

33.9 References 3GPP TS 25.301, “Radio Interface Protocol Architecture, V5.6.0”. 3GPP TS 25.211,” Physical channels and mapping of transport channels onto

physical channels (FDD), V5.8.0” 3GPP TS 25.321,” Medium Access Control (MAC) protocol specification,

V5.12.0”. 3GPP TS 25.302, “Services provided by the physical layer, V5.9.0”


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33 channels description

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