Signaling Analysis of Typical UTRAN Procedures Optimization ISSUE1 00

download Signaling Analysis of Typical UTRAN Procedures Optimization ISSUE1 00

of 97

  • date post

    12-Oct-2015
  • Category

    Documents

  • view

    29
  • download

    2

Embed Size (px)

description

Signaling Analysis of Typical UTRAN Procedures Optimization ISSUE1 00

Transcript of Signaling Analysis of Typical UTRAN Procedures Optimization ISSUE1 00

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l Revision update record:

    p Add the pictures of signaling procedures in the remarks(Page38&43-45&50-

    52&59-65).

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l UMTS network is composed of CN,UTRAN and UE.

    l For UTRAN network includes RNC and NodeB .

    l RNS means Radio Network Subsystem ,which is composed of one RNC and the the

    NodeBs under its control.

    l The interface between RNC and NodeB is IUB interface. IUR interface may be

    configured between two RNC, it is optional, used for inter-RNC cooperation.

    l RNC is connected to CS domain through IU-CS interface and connected to PS domain

    through IU-PS interface.

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l By RRC signaling, RNC controls UE. So the RRC is the most important signaling in

    UTRAN. The access success rate , handover success rate are all calculated based on the

    RRC signaling statistic. RRC signaling is very useful to analyze the fault.

    l IUB interface signaling is called NBAP signaling, which can be used for locating NodeBs

    faults.

    l By analyze RANAP signaling between RNC and CN, we can locate a fault in CN or in

    UTRAN, especially for RAB assignment ,call drop, inter-RAT relocation and paging

    procedure, RANAP signaling is very useful.

    l By analysis of RNSAP signaling between two RNC, we can trace inter-RNC handover

    procedure.

    l Most of the procedures are realized by cooperation of several interfaces.

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l In idle mode, UE reads system information , so as to control it self. The behaviors in Idle

    mode include PLMN selection, cell selection and reselection, paging monitoring;

    l When UE needs to perform location update, attach, detach procedures, it will

    trigger request for RRC setup , enter connected mode, then finish the signaling

    procedure with CN. After that, RNC releases the RRC connection, to let UE go back to

    idle mode.

    l After UE receives a paging or when user initiates a service, UE will trigger RRC

    setup ,in connected mode, UE will then send and receive NAS signaling with CN.

    After that , CN may start RAB assignment procedure to set up a bearer for the service.

    l During the service ,UTRAN may handover the CELL-DCH UE to neighbor cell based on

    the mobility of the UE or based on the load of the cell. CELL-FACH\CELLPCH UE may

    trigger cell update procedure after it move to a area covered by a neighbor cell.

    l During the PS service period, UTRAN may reconfigure the radio bear of the service

    based on the network load or users activity.

    l In case of service changing (such as to change a VP service to a AMR service ), RAB

    modification procedure is needed.

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l The logical structure of system information is like a tree.

    l By the index in MIB and SB, UE can read the detail contents in SIB

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l By the drive test tool, we can trace the system information, so as to know some basic

    information of a cell.

    l In default condition, Huawei network adopts following types of system information:

    p MIB: master information block

    p SB: scheduling block

    p SIB: system information block, includes SIB1, SIB2, SIB3, SIB5, SIB7, SIB11.

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l MIB: master information block

    l PLMN is broadcasted in MIB, that is MCC and MNC of the network, which is used for

    UE PLMN selection

    l Besides that, MIB includes scheduling information of SB and SIB, that is the index, by

    which UE can acquire the location of SB and SIB, so as to read the detail information in

    SIB.

    PLMN ID

    Scheduling information for SB and SIB

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SB: Scheduling block

    l SB only tells the scheduling information of SIB, such as the scheduling information of

    SIB1/SIB2/SIB3 in this example.

    l The scheduling information of other SIB(SIB5, SIB7, SIB11) is in the MIB.

    Scheduling information of SIB1

    Scheduling information of SIB2

    Scheduling information of SIB3

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB1:System Information Block1

    l DRX means discontinuous reception, used to save the battery of the UE when

    monitoring the paging.

    l Counters and constants are used to control the procedures of access , cell update ,

    DCH setup of the UE, and so on, the meanings of the counters refer to 3GPP 25.331

    DRX Coefficient of CS domain

    Counters and constants used for UE in connected mode

    Counters and constants used for UE in Idle mode

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB2 indicates the URA ID of a cell, URA ID is used for mobility management of a UE in

    URA-PCH state.

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB3:System Information Block 3

    l In SIB3,UE can get related parameters for cell selection/reselection

    l Try to answer the following questions:

    p What is the use of Max allowed UE transmitting power here?

    p In the example of this page, what is the RNC ID and cell ID?

    p In the example of this page ,check the cell selection parameters and compare it with the default setting, which parameter is changed , and what is the

    Intra/inter frequency cell reselection threshold

    Available AC of this cell

    Inter-RAT cell reselection threshold

    Cell selection threshold

    Cell reselection time to triggerMax allowed UE transmitting power

    RNCID + cell ID

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB5:System information Block5

    l Question:

    PICH/AICH power

    PRACH configration

    RACH transmission format

    Available access resource

    Mapping between AC and ASC

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB5:System information 5 (Cont.)

    l Question:

    p What is the use of PCPICH power here?

    PCPICH power

    AICH SF

    Cell HSDPA capability

    Cell HSUPA capability

    Random access parameters

    Configuration of SCCPCH

    Configuration of PICH

    PDF created with FinePrint pdfFactory Pro trial version http://www.fineprint.com

  • Signaling Analysis of Typical UTRAN Procedures

    Confidential Information of Huawei. No Spreading Without Permission

    l SIB7:System inf