002 WCDMA Radio Interface Physical Layer

download 002 WCDMA Radio Interface Physical Layer

of 26

  • date post

    01-Jun-2018
  • Category

    Documents

  • view

    226
  • download

    0

Embed Size (px)

Transcript of 002 WCDMA Radio Interface Physical Layer

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    1/60

     

    WCDMA Radio Interface Physical Layer

    Huawei Technologies Co., Ltd. All rights reserved

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    2/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 2/60

    Revision Record

    Date Version Change description Author

    28-02-2007 1A Victor Toledo

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    3/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 3/60

    Table of Contents

    1  Physical layer Overview..........................................................................................................9  Protocol structure for radio interface...............................................................................10

    Spreading technology......................................................................................................14 Channelization Codes .....................................................................................................15 Scrambling codes............................................................................................................16

    2  Physical layer key technology .............................................................................................19  Logical channels..............................................................................................................19 Transport channels ..........................................................................................................21 Physical channel ..............................................................................................................22 Cell broadcast channels...................................................................................................25 Paging channels...............................................................................................................29 Random access channels................................................................................................32 Dedicated channels..........................................................................................................35 High speed downlink shared channels ............................................................................37 Channel mapping .............................................................................................................40

    3  Physical layer processing procedure..................................................................................41 Coding and multiplexing technology ...............................................................................41 Spreading technology......................................................................................................47 Modulation technology .....................................................................................................50 

    4  Physical layer procedures....................................................................................................51  Cell search procedure .....................................................................................................51 Channel timing relationship.............................................................................................52 Random access procedure .............................................................................................53 Transmit Diversity Mode...................................................................................................55  Transmit Diversity-STDD .................................................................................................56  Transmit Diversity TSTD ..................................................................................................57  Closed Loop Mode ...........................................................................................................58 

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    4/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 4/60

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    5/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 5/60

    Foreword

    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, for example Modulation and spreading/demodulation and despreading, Inner - loop power control etc. 

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    6/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 6/60

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    7/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 7/60

    Objectives

    Upon completion of this course, you will be able to:

    •  Understand radio interface protocol Architecture.

    •  Understand key technology of UMTS physical layer.

    •  Understand UMTS physical layer procedures.

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    8/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 8/60

    References

      TS 25.104 UTRA (BS) FDD Radio Transmission and Reception

      TS 25.201 Physical layer-general description

      TS 25.211 Physical channels and mapping of transport channels onto physical

    channels (FDD)

      TS 25.212 Multiplexing and channel coding (FDD)

      TS 25.213 Spreading and modulation (FDD)

      TS 25.214 Physical layer procedures (FDD)

      TS 25.308 UTRA High Speed Downlink Packet Access (HSDPA); Overall

    description; Stage 2

      TR 25.877 High Speed Downlink Packet Acces (HSDPA) - Iub/Iur Protocol

    Aspects

      TR 25.858 Physical layer aspects of UTRA High Speed Downlink Packet Access

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    9/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 9/60

    Physical Layer Overview

    Figure 1.- UTRAN Protocol structure.

    UTRAN:UMTS Terrestrial Radio Access Network.

    The UTRAN consists of a set of Radio Network Subsystems connected to the Core Network through the Iu.

    A RNS consists of a Radio Network Controller and one or more Node Bs. A Node B is connected to the RNC through the Iub interface.

    Inside the UTRAN, the RNCs of the Radio Network Subsystems can be interconnected together through the Iur. Iu(s) and Iur are logical interfaces. Iur can be conveyed over direct physical connection between RNCs or virtual networks using any suitable transport network.

    Iur 

    Node B 

    RNS 

    RNC 

    RNS 

    RNC 

    Core Network 

    Node B  Node B  Node B 

    Iu  Iu 

    Iub  Iub Iub  Iub 

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    10/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 10/60

    Protocol Structure for radio interface

    Figure 2.- Radio Interface Protocol structure.

    The radio interface (Uu) is layered into three protocol layers:

      the physical layer (L1)   the data link layer (L2)   the network layer (L3).

    The layer 1 supports all functions required for the transmission of bit streams on the physical medium. It is also in charge of measurements function consisting in indicating to higher layers, for example, Frame Error Rate (FER), Signal to Interference Ratio (SIR), interference power, transmit power. It is basically composed of a “layer 1 management” entity, a “transport channel” entity, and a “physical channel” entity.

    The layer 2 protocol is responsible for providing functions such as mapping, ciphering, retransmission and segmentation. It is made of four sublayers: MAC (Medium Access Control), RLC (Radio Link Control), PDCP (Packet Data Convergence Protocol) and BMC (Broadcast/Multicast Control).

    The layer 3 is split into 2 parts: the access stratum and the non access stratum. The access stratum part is made of “RRC (Radio Resource Control)” entity and “duplication avoidance” entity. The non access stratum part is made of CC, MM parts.

  • 8/9/2019 002 WCDMA Radio Interface Physical Layer

    11/60

      WCDMA Radio Interface Physical Layer Confidentiality level: Customer

    Mexico Training Center Confidential information of Huawei. Page 11/60

    Not shown on the figure are connections between RRC and all the other protocol layers (RLC, MAC, PDCP, BMC and L1), which provide local inter-layer control services.

    The protocol layers are located in the UE