GSM and WCDMA Single site verification SSVSingle site verification (SSV) is an audit method, where we need to check the entire KPI (Key performance indicator), coverage and quality for a single radio base station site. For GSM (Global System for Mobile Communications ) network a single site has more than twenty KPI (Key performance indicator), on the other hand for WCDMA (Wideband Code Division Multiple Access) including HSPA plus a single site has more than forty five Key performance indicators (KPI). But all the KPI doesn’t carries the same morals, on the other hand less significant KPI values depends on the major KPIs. So, we often check major Key performance indicators for single site verification (SSV). The entire single site verification (SSV) can be categorized into three subcategory. These are: Radio frequency parameter verification (RF verification). Radio frequency (RF) functionality test. Drive test and RNO (Radio network optimizer) verification. Radio frequency parameter audit (RF audit): RF audit may be classified into parts: 1. General parameter audit. 2. Radio parameter audit. General parameter audit: In general parameter audit, we have to check the coordinate(latitude and longitude) of radio base station, address, BTS/RBS information (BTS/RBS name, model or version, vendor etc.), Cluster name and type, transceiver configuration (TRX conf), business region name and type, BSC (Base station controller) name, MSC (Main switching center) name, radio base station security guard or gate keeper contract or house owner contract details. An example of general parameter audit is given bellow: Radio parameter audit: In a radio parameter audit. electrical tilt. Location area code (LAC) etc. An example of RF (Radio Frequency) parameters audit is given bellow: Figure: Radio frequency (RF) parameter audit information. Fifty meter measuring tape. Digital camera. Tools and software for RF parameters audit: Digital or magnetic compass.Figure: General radio parameter audit information. Safety tools for rigger. antenna information (model with vendor information). allocated ARFCN (absolute radio frequency channel number) in BCCH (broadcasting control channel). we need to check entire RF parameter such as antenna height. . cell azimuth. Tilting meter. feeder cable type. mechanical tilt. feeder cable length. Base station identity code (BSIC). Tools and Software for single site verification (SSV) drive test (DT): TEMS Investigation data collection software. Mapinfo professional (minimum version 8. An example of Drive test equipment arrangement is given bellow: .5scp) Microsoft excel (as a SSV template) Microsoft Power point (As a SSV template) Or Or Or Mobile Station (MS) Inverter (as a power source for laptop) GPS (Global positioning system) receiver. Genex probe Nemo outdoor. Google Earth (Software) Drive test and Radio network optimizer (RNO) verification: Drive test and Radio network optimizer (RNO) verification is the final step for single site verification (SSV). For SSV drive test we need to unique arrangement for testing terminals. Redial triggers should be Time out.Figure: Drive Test equipment arrangement. Also we use GPS receiver (global positioning system) as a testing terminal. blocked call and dropped call. Mobile station-3 (MS3): Typically MS3 configured in dedicated mode long call and unlocked. . actually we have to lock Broadcasting Control Channel (BCCH) for all cell. Usually. Usually short call duration is thirty seconds. there is no limit for long call duration. Mobile station-2 (MS2): Typically MS2 configured in dedicated mode short call and unlocked. There is no limit of number of test call. This Mobile station (MS) are designated as MS1. Drive test (DT) procedure: Drive test is the most significant event in entire verification process. MS2 and MS3 respectively. For single site verification (SSV) drive test (DT). For locking Mobile station (MS). we use three mobile stations (MS) as a testing terminal. Test call will be continued entire test period with ten seconds as a frequent call interval period. Redial triggers should be Time out. blocked call and dropped call. SSV Mobile station (MS) configuration: Mobile station-1 (MS1): typically MS1 configured in idle mode and locked with the site. . Drive Test (DT) Log collection method: Start collecting log files from the site access road of SSV (Single site verification) radio base site to neighbor site access road. that means from the SSV (Single site verification) radio base site to neighbor radio base site and neighbor radio base site to SSV (Single site verification) radio base site.Figure: Command sequence for MS2 and MS3. collect the log files in both way. Run the command sequence for mobile station-2 (MS2) and mobile station-3 (MS3). cover the entire car accessible road surrounding (360 degree) of radio base SSV site. Please check the figure in bellow: Figure: Single site verification (SSV) drive test (DT) route. we collect total coverage area of a radio base site and received signal strength (RxLevel) . call setup success rate (CSSR). also we check cell mismatch (feeder cable swap). Handover success rate (HOSR). The major Drive Test (DT) events comprises of number of call attempts. The presentation of drive test major event analysis is given bellow: Figure: Drive Test (DT) event analysis From Mobile Station-1 (Idle mode) SSV data presentation: From mobile station-1 (MS1).Drive Test (DT) data presentation System: Event Analysis: All the mobile station is significant to check performance of radio base site through Drive Test (DT). An example of total coverage area and received signal strength (Rxlevel) of radio base site is given bellow: . number of successful handover. number of call established. number of handover attempt. number of dropped call and dropped call rate (CDR). We have to present major drive test (DT) event in reporting templates. call continuity. mobile allocation index offset (MAIO) of radio base site. Inter Site handover. we check received signal quality (RxQual). MS2 functionality test include call setup. We have already discussed about event analysis of Drive Test. call setup time. From Mobile Station-3_MS3 (dedicated mode) SSV data presentation: From mobile station-3. An example of serving cell footprint diagram is given bellow: . overshooting of neighbor cell. handover relation status (inter cell and intra cell). From Mobile Station-2_MS2 (dedicated mode) SSV data presentation: Form mobile station (MS2). events. planning parameter such as ARFCN (Absolute Radio Frequency Channel number) of BCCH (broadcasting control channel).Figure: Total coverage area of SSV radio base site. serving cell footprint of SSV drive test route. handover sequence number (HSN). we check basic functionality test. Intra site handover (handover between radio base sites own cell). radio base site coverage footprint is satisfactory. . Key performance indicator (KPI) monitoring will be continued on daily basis. 175 in E-GSM. it's a down link channel of GSM air interface. There are 124 ARFCN in P-GSM. BCCH: BCCH means for broadcasting control channel. configuration and identity.Figure: Serving cell footprint of SSV DT route. RNO (Radio network optimizer) and RNP (Radio network planner) Remarks: RNP remarks: There is no mismatch found within planned and implemented radio frequency parameter. Abstract: ARFCN: "ARFCN means for Absolute Radio Frequency Channel number. RNO Remarks: Site performance is satisfactory. 375 in DCS 1800. BCCH carries system information of radio base station including available features. which is collected in real time through Drive Test (DT). call continuity test (long call only)." Drive test (DT) Logs: " Drive test log files include network signaling and event information. Inter site Handover: "Inter site handover is the handover between two adjacent or neighbor sites cell. network accessibility test (short call). Also we can collect logs from the BSC (Base station controller) end through IMEI (International Mobile station Equipment Identity) tracing." Radio frequency parameter verification (RF verification): . Handover Success rate (HOSR): "Handover success rate (HOSR) is the radio between number of handover attempts and number of successful handover. CGI = Mobile country code (MCC) + Mobile network code (MNC) + Location area code (LAC) + cell Id (CI)." Drive Test (DT): "Drive test (DT) is a network log collection procedure in vehicular mode. Call setup success rate (CSSR): "Call setup success rate is the ration between the number of handover attempts and number of successful handover. HOSR is presented in percentage. also there is a cell global identity (CGI)." Cell ID: "Every individual cell of mobile network has a unique cell ID for own network." Intra site Handover: "Intra site handover is the handover between two cell of same radio base site." Radio frequency (RF) functionality test: “Radio frequency functionality test means for checking the various functionality of a single radio base site such as general call test (both long call and short call). call setup time etc. CSSR is presented in percentage. data throughput test. “Radio frequency parameter verification (RF verification) means for verifications of installed radio parameter with the previously planned radio parameter.” Figure: Received signal quality of entire single site verification SSV of radio base station serving area. .
Report "GSM and WCDMA Single Site Verification SSV"