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    RRC Analysis Summarize

    Uploaded by

    abuzarshazli
    This document analyzes RRC SSR issues by outlining definitions, analysis steps, and specific analysis techniques. It defines RRC SSR as relating to either service or all connections. The analysis process involves first locating issues by top sites or sectors, then investigating potential root causes like alarms, packet loss, coverage, neighbor cells, or RTWP using techniques like checking KPI trends or signal levels. Determining whether a coverage problem is uplink or downlink is also described. The overall goal is to correctly diagnose the root cause of RRC SSR issues.

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    RRC Analysis Summarize

    Uploaded by

    abuzarshazli
    76 views14 pages
    This document analyzes RRC SSR issues by outlining definitions, analysis steps, and specific analysis techniques. It defines RRC SSR as relating to either service or all connections. The analysis process involves first locating issues by top sites or sectors, then investigating potential root causes like alarms, packet loss, coverage, neighbor cells, or RTWP using techniques like checking KPI trends or signal levels. Determining whether a coverage problem is uplink or downlink is also described. The overall goal is to correctly diagnose the root cause of RRC SSR issues.

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    This document analyzes RRC SSR issues by outlining definitions, analysis steps, and specific analysis techniques. It defines RRC SSR as relating to either service or all connections. The analysis process involves first locating issues by top sites or sectors, then investigating potential root causes like alarms, packet loss, coverage, neighbor cells, or RTWP using techniques like checking KPI trends or signal levels. Determining whether a coverage problem is uplink or downlink is also described. The overall goal is to correctly diagnose the root cause of RRC SSR issues.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    76 views14 pages

    RRC Analysis Summarize

    Uploaded by

    abuzarshazli
    This document analyzes RRC SSR issues by outlining definitions, analysis steps, and specific analysis techniques. It defines RRC SSR as relating to either service or all connections. The analysis process involves first locating issues by top sites or sectors, then investigating potential root causes like alarms, packet loss, coverage, neighbor cells, or RTWP using techniques like checking KPI trends or signal levels. Determining whether a coverage problem is uplink or downlink is also described. The overall goal is to correctly diagnose the root cause of RRC SSR issues.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    You are on page 1of 14

    Proprietary

    Confidential

    RRC SSR Issue Analysis Summarize

    Outline

    Definition of RRC SSR

    Analysis Step of RRC SSR Issue

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    Confidential

    1. Definition of RRC SSR

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    Confidential

    RRC SSR:

    RRC SSR (Service Related)

    RRC SSR (All)

    Now we use RRC SSR(All) counter

    2. Analysis of RRC SSR Issue

    Issue Location Step


    Site Alarms
    NodeB Source
    Packet Loss
    Coverage
    RSSI
    Neighbor Cell
    RTWP

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    Confidential

    Proprietary
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    2.1 Issue Location


    TopN Cells in 1 Cluster

    All sectors in 1 site have issue

    1 or 2 sector in1 site have issue

    OMMR Team

    Site Alarms

    Coverage / RSSI

    TI Team

    OMMR Team

    NodeB Source

    Neighbor Cell

    Planning Team

    Transmission Team

    Packet Loss

    RTWP

    OMMR Team

    Other Issue

    Optimization expert

    2.2 Site Alarms

    Major or critical 3G site alarms, fg:


    SCTP association is interrupted
    VSWR alarms
    Cell / NodeB is out of service
    RRU link is broken

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    2.3 NodeB Source

    CE resource limited

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    2.4 Packet Loss

    Packet loss ratio

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    2.5 Coverage & RSSI

    RSSI: the absolute difference of RSSI between antenna 1 and antenna 2


    7 days KPI, daily level
    Both the 2 cells in 1 sector is greater than 8, and continue a long time

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    2.5 Coverage & RSSI

    Overshooting: the propagation delay is greater than 8,


    7 days KPI, daily level
    Both the 2 cells in 1 sector has the overshooting issue

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    2.6 Neighbor Cell

    Neighbor cell missing


    3G neighbor cells should greater than 25
    the coverage direction should be added 2 or 3 arc
    the behind direction should be added 1 arc
    2G neighbor cells should greater than 12(in future maybe is 20)

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    2.7 RTWP

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    Usually the normal RTWP is -105 ~ -102 dBm


    Because of the serious interference in LHR, if the RTWP is not greater than -90dBm, we
    think it is normal

    2.6 Poor Coverage

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    Confidential

    The decision whether it is problem of uplink or downlink poor coverage is based on the
    power of dedicated channel before call drop.
    UL Poor Coverage:

    TX power reaches the maximum

    UL BLER is poor

    NodeB report RL failure


    DL Poor Coverage:

    TX power reaches the maximum

    DL BLER is poor
    Scanner:

    If the RSCP and Ec/Io of the cell with the best coverage are poor, you can infer that
    the coverage is poor.

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