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Troubleshooting for GSM KPIs (SD Block & SD Drop)

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KPIs to be monitored: ·             SD Blocking ·             SD Drop SDCCH Channel: ·    SDCCH channel is a dedicated channel which is using for LAC updation, Call Setup, SMS in Ideal mode. It works in UL & DL SD Blocking: ·    SD Blocking means that you are not getting SD resource for the call origination. When MS connects with Network then RACH and AGCH are provided. After AGCH, SDCCH is provided but if SDCCH is not provided at this time due to some problem or due to unavailable of SD by BSC. KPI Formula in Ericsson: ·             SDCCH CONGESTION = (CCONGS / CCALLS) * 100 ·             CCONGS - Congestion counter. ·  ...
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Common Channel Configuration in LTE

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Common Channel Configuration Uplink resource blocks are required to be allocated for uplink control signaling (PUCCH). The number of RBs will be dependent on bandwidth and loading. Downlink resources are also allocated for downlink control signaling on the PDCCH channel. This is specified as the number of OFDM symbols (Control Format Indicator). PDCCH and PUCCH allocations will have an impact on peak data throughputs and system capacity. The PDCCH power boost feature makes it possible to adjust the power of the PDCCH to match the actual number of needed Control Channel Element (CCE) resources. Use cases include beam forming coverage extension, range extensions for small cells and general increase of the PDCCH capacity, which is useful for e.g. VoLTE applications. The maximum power increase is 6 dB. The feature can be used in conjunction with the Enhanced PDCCH Link Adaptation feature which can provide significantly increased PDCCH capacity, as the RBS better determines ...
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EPS Network Identifier in LTE

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Mobile country code (MCC) is a 3 digit code, assigned by international telecom union to identify a country in a mobile communication. Mobile network code (MNC) is a 2 to 3 digit code, assigned by national authority. Public land mobile network identity (PLMN Id) consists of MCC and MNC. It is used for unique identification of a PLMN. Tracking area identity (TAI) is globally unique and consists of PLMN id and tracking area code (TAC) where TAC is of 16 bits and it is used to indicate eNB to which Tracking Area the eNB belongs  and it is unique within a PLMN. It is similar to location area identity (LAI) in GSM. International Mobile Subscriber Identity (IMSI) consists of PLMN id and Mobile subscriber identification number (MSIN). It is unique identification of mobile (LTE) subscriber and not more than 15 digits. MME temporary Mobile Subscriber Identity (M-TMSI) is unique within MME and assigned by the operator. It is of 32 bits. SAE Temporary Mobile Subscriber I...
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