GSM / UMTS

Transcription

1 Quality of Service GSM / UMTS Mobile Networks and Services Survey on the QoS of the Voice (GSM), Video-telephony (UMTS) and Network Coverage (GSM and WCDMA) Services, in the main Urban Agglomerations and Major Roads of Mainland Portugal. November / December 2006

2 White 2 QoS - Mobile Networks and Services / GSM-UMTS

3 Index I Executive Summary...5 I.I Framework...5 I.II Main Results and Conclusions Quality of Service Assessment Goal Analyzed Services Service Independent (GSM/WCDMA): Telephony Services (GSM/UMTS): Methodology Fundamentals QoS Indicators Service Independent Availability of the Radio-electric network (Coverage) Telephony Services Service Accessibility (Voice or Video-telephony) Time to Establish a Call (Voice or Video-telephony) Call Termination Rate (Voice or Video-telephony) Call Audio Quality (Voice or Video-telephony) Video-Telephony Call Video Quality Measurement Profiles Coverage Telephony Services Voice Service Video-telephony Service Test/Measurement and Post-Processing System Study Sample Tested Areas Sample Size Data Collection Conditions Aggregated Results Urban Agglomerations Voice Service (GSM) Service Accessibility and Call Termination Rate Indicators Time to Establish a Call Indicator Voice Call Audio Quality Indicator Function Density Probability of The Voice Call Audio Quality Indicator Function Cumulative Distribution of the Voice Call Audio Quality Indicator Video-Telephony Service (UMTS) Service Accessibility and Call Termination Rate Indicator Time to Establish a Call Indicator Video-Telephony Call Audio Quality Function Density Probability of the Video-Telephony Call Audio Quality Indicator Function Cumulative Distribution of the Video-telephony Call Audio Quality Indicator Video-telephony Call Video Quality de Indicator Function Density Probability of the Video-Telephony Call Video Quality Indicator Function Cumulative Distribution of the Video-telephony Call Video Quality Indicator...33 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

4 4.1.3 Network Coverage GSM GSM Function Probability Density GSM - Function Cumulative Distribution WCDMA WCDMA - Function Probability Density WCDMA - Function Cumulative Distribution Major Roads Voice Service (GSM) Service Accessibility And Call Termination Rate Indicators Time to Establish a Call Indicator Voice Call Audio Quality Indicator Function Probability Density of the Voice Call Audio Quality Indicator Function Cumulative Distribution of the Call Audio Quality Indicator Video-Telephony (UMTS) Service Accessibility and Call Termination Rate Indicators Time to Establish a Call Indicator Video-Telephony Call Audio Quality Indicator Function Probability Density of the Video-Telephony Call Audio Quality Indicator Function Cumulative Distribution of the Video-Telephony Call Audio Quality Indicator Video-Telephony Call Video Quality Indicator Function Probability Density of the Video-Telephony Call Video Quality Indicator Function Cumulative Distribution of the Video-Telephony Call Video Quality Indicator Network Coverage GSM GSM Function Probability Density GSM Function Cumulative Distribution WCDMA WCDMA Function Probability Density WCDMA Function Cumulative Distribution Global Voice Service (GSM) Service Accessibility and Call Termination Rate Indicators Time to Establish a Call Indicator Voice Call Audio Quality Indicator Function Probability Density of the Voice Call Audio Quality Indicator Function Cumulative Distribution of the Voice Call Audio Quality I ndicator Video-Telephony (UMTS) Service Accessibility and Call Termination Rate Indicators Time to Establish a Call Indicator Video-Telephony Call Audio Quality Indicator Function Probability Density of the Video-telephony Call Audio Quality de Function cumulative distribution of the Video-telephony Audio Quality Indicator Video-telephony Call Video Quality de Indicator Function Probability Density of the Video-Telephony Call Video Quality Indicator Function Cumulative Distribution of the Video-telephony Call Video Quality Indicator Network Coverage GSM GSM Function Probability Density GSM Function Cumulative Distribution WCDMA WCDMA - Function Probability Density WCDMA - Function Cumulative Distribution Coverage Maps QoS - Mobile Networks and Services / GSM-UMTS

5 I EXECUTIVE SUMMARY I.I FRAMEWORK Autoridade Nacional de Comunicações (ANACOM) carried out in November and December 2006 an assessment on the quality of the voice (GSM), video-telephony (UMTS) and network coverage (GSM and WCDMA) mobile services, provided by operators, and in the main urban agglomerations and major roads of mainland Portugal, by analysing technical parameters that translate the quality perception from the consumer s standpoint. This quality assessment presents considerable changes regarding the studies conducted in the last 6 years, with highlight to the reformulation of the methodology used and broadening the analysis to services supported on UMTS networks, which was made possible by the use of new measurement and post-processing equipment recently purchased by ANACOM for this purpose. The new testing techniques and reckoning algorithms implemented by this new measurement system provide results with a higher accuracy and reliability. With the contribution of operator, and, the analysis methodology was redefined in is several features, namely regarding the definition of measurement indicators and profiles, and by broadening the analysis to services supported on UMTS networks. However, regarding the studies of previous years, three basic principles were maintained: a) End-to-end measurements measured values reflect all the aspects that influence the quality of service. b) Impartiality measurements are conducted under equal terms for the three operators (, and ). c) Objectivity tests are conducted on a totally automatic way, thus eliminating the subjectivity of human intervention or decision. The methodological approach followed makes it possible for the analysis of the services to be made independently from the operation of the own networks, e.g., areas with lower coverage or lack of coverage are also considered in the analysis, thus making the results of the study translate into a good indicator of the networks global behaviour from the user s standpoint. The main quality indicators were analysed, considering the user s standpoint and the services under Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

6 study: 1. Network Coverage Availability of the GSM and WCDMA (UMTS) radio-electric networks; 2. Service Accessibility (voice or video-telephony) probability of success when establishing calls; 3. Time to Establish a Call (voice or video-telephony) period of time that the network takes to establish the communication, after the correct sending of the request (destination telephone number); 4. Call Termination Rate (voice or video-telephony) Probability for a call, after being established with success, to be maintained during a period of time, ending normally, i.e., according to the users will; 5. Call Audio Quality (voice or video-telephony) perception of the conversation during a call; 6. Call Video Quality (video-telephony) perception of the communication s video feature. The selection of locations for measurements in this study maintained the criteria followed in the studies carried out in the previous years, and therefore testes were made in all district capitals, broadening the data collection area to the metropolitan regions of Lisbon and Porto, and to the major roads of the Mainland. The population present in the urban agglomerations that make up the selected sample represents 41.7% of the Portuguese population, according the results of the last Census (2001 Census). Data collection took place on working days and during normal working hours, between 13 November and 20 December ,353 test calls were made, as well as 3,198,504 radio signal level measurements, corresponding to more than 212 hours of measurements along 8,789 kilometres. Using a representative sample provided results, by operator, with a maximum error below 1.47% on urban agglomerations, and bellow 3.16% on major roads, for a 95% confidence level. In view of these services penetration rate, of the diversity of the terminal equipment that is used, and given each user s subjective view itself, it is impossible to rigorously reproduce each consumer s conditions of interaction with the networks. In this context, the results of this study must thus be understood as an indicator of the networks behaviour. Their transposition/extrapolation to specific situations requires some prudence, at the risk that biased conclusions might be taken. 6 QoS - Mobile Networks and Services / GSM-UMTS

7 The technical and methodological options of this study directly influenced its results and must be taken into account when analyzing the results, namely the following: Tests were exclusively based on a technical solution (equipment + software) and performed in a totally automatic way, thereby setting homogenous conditions for the monitoring of the three operators and eliminating the subjectivity inherent to the human user; It used NOKIA 6680 terminal equipment; Tests were carried out in moving vehicles and with outdoor antennas (without gain); Call duration, both for voice and video-telephony, was 120 seconds; Voice tests were made with manual selection of the 2G (GSM) infrastructure, while videotelephony tests were made with automatic selections of the 2g or 3G (GSM/UMTS) infrastructure; Coverage indicators, specially the WCDMA Coverage, do not take into account networks loads (number of simultaneous users and type of services used); The new measurement systems call on the most recent testing techniques and implement new reckoning algorithms; therefore, the results produced are not directly comparable with those of the studies carried out by ANACOM in the last 6 years; The results of the study only reflect the behaviour of the networks on the places and moments of the measurements; On the other hand, operators are permanently improving their networks. The technical interventions necessary for these improvements can cause momentary degradations of the service in the geographic area of intervention. Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

8 I.II MAIN RESULTS AND CONCLUSIONS Results recorded by the quality of service indicators on this study reveal important differences between GSM and UMTS networks. GSM networks present good coverage levels and a good performance of the voice service, both in urban agglomerations and major roads. UMTS networks did not reach these results. These networks still do not present a good WCDMA coverage, with bad coverage in some areas and even, in some cases, complete lack of service, mainly in major. On the other hand, the video-telephony service has a reasonably good performance in urban agglomerations, but a rather lower one on major roads. GSM and WCDMA Network Coverage Network coverage present different results for each analysed technology. GSM has good results, with little differences between operators and among the analysed locations urban agglomerations and major roads. WCDMA shows poorer results than GSM with considerable differences regarding the locations analysed and also between operators. On urban areas WCDMA coverage, although lower than GSM, presents good results. Operator reached the lowest results with 97.2% of measurements reaching the Good Coverage mark Coverage GSM Good Acceptable Bad Non-existent % 97.2% 99.2% 1. Coverage WCDMA % Good Acceptable Bad Non-existent 0.1% 0.5% % 0. Figure 1 Coverage indicator on Urban Agglomerations. On major roads, WCDMA coverage is still very far from what is considered suitable for the provision of quality services. All networks recorded areas with bad coverage or even total absence of coverage. 8 QoS - Mobile Networks and Services / GSM-UMTS

9 stands out negatively, with only 82.6% of the measurements reaching Good or Acceptable quality levels and 17.4% presenting Bad or Non-existent levels. The best results were obtained by operator with 87.3% of measurements within the Good or Acceptable levels and 12.7% presenting Bad or Non-existent levels % 99.9% 99.8% 0.1% Coverage GSM 0.1% 0.1% Good Acceptable Bad Non-existent % 75.4% 76.8% 12.8% Coverage WCDMA 10.6% 10.5% Good Acceptable Bad Non-existent 7.1% 6.2% % 7.8% 7.7% Figure 2 Coverage indicator on Major Roads. Voice Service (GSM) The voice service present good results on all of the analyzed indicators. Voice Service Mobile Fixed Voice Service Fixed Mobile % 98.6% 99.7% 99.3% 98.9% 99.5% Service Accessibility Call Termination Rate % 98.4% 99.2% 99.3% 99.1% 99.6% Service Accessibility Call Termination Rate Figure 3 Service Accessibility and Call Termination Rate indicators on Urban Agglomerations. No important differences were registered among operators. Also between urban agglomerations and major roads no major differences were registered regarding the analysed indicators. Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

10 Voice Service Mobile Fixed Voice Service Fixed Mobile % 99.1% 99.3% 98.3% 98.8% 99.3% Service Accessibiity Call Termination Rate % % 98.2% 98.2% 99.1% Service Accessibiity Call Termination Rate Figure 4 Service Accessibility and Call Termination Rate indicators on Major Roads. [s] Time to Establish a Call Mobile Fixed [s] Time to Establish a Call Fixed Mobilel Figure 5 Time to Establish a Call indicator on Urban Agglomerations. [s] Time to Establish a Call Mobile Fixed [s] Time to Establish a Call Fixed Mobile Figure 6 Time to Establish a Call indicator on Major Roads. 10 QoS - Mobile Networks and Services / GSM-UMTS

11 Voice Calls Audio Quality Mobile Fixed Voice Calls Audio Quality Fixed Mobile Figure 7 Call Audio Quality indicator on Urban Agglomerations. Voice Calls Audio Quality Mobile Fixed Voice Calls Audio Quality Fixed Mobile Figure 8 Call Audio Quality indicator on Major Roads. Video-telephony Service (UMTS) The video-telephony service shows results far below those reordered for the voice service, namely regarding the Service Accessibility and Call Termination Rate indicators. Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

12 % Video-telephony Service 83.7% 94.1% Service Accessibility 98.2% 96.2% 96.7% Call Termination Rate [s] Time to Establish a Call Figure 9 Service Accessibility, Call Termination Rate and Time to Establish a Call indicators on Urban Agglomerations % Video-telephony Service 64.8% 67.9% Service Accessibility 95.5% % Call Termination Rate [s] Time to Establish a Call Figure 10 Service Accessibility, Call Termination Rate and Time to Establish a Call indicators on Major Roads. The Service Accessibility indicator shows considerable differences between urban zones and major roads. While it presents good levels on urban areas, the levels recorded on major roads are quite lower. Operator presents the best results with 94.1% and 67.9%, success rates in the establishments of calls on urban agglomerations and on major roads, respectively. The lowest results recorded on urban agglomerations belong to operator, with an 83.7% success rate when establishing a call, while on major roads reached the lowest rate, with only 56.7% success in the establishments of calls. The Call Termination Rate indicator presents better levels than the Service Accessibility indicator, also with fewer differences between urban agglomerations and major roads. 12 QoS - Mobile Networks and Services / GSM-UMTS

13 Differences among operators are greater on major roads. Operator presents the best figures: 98.2%, on urban agglomerations, and 95.5%, on major roads. recorded the lowest results, 96.2% on urban agglomerations, both with, with 90.4% on major roads. The average time for establishing a call show no major differences between the results observed on urban agglomerations and on major roads. recorded the highest average time, with about 10 seconds. The best average time was recorder by with about 6.5 seconds. The Audio Quality and Video Quality indicators showed good results, with little differences between operators and between urban agglomerations and major roads. However, the best average results were obtained by operator, on urban agglomerations. Video-telephony Calls Audio Quality Video-telephony Calls Audio Quality Figure 11 Call Audio Quality and Call Video Quality indicators on Urban Agglomerations. Video-telephony Calls Video Quality Video-telephony Calls Video Quality Figure 12 Call Audio Quality and Call Video Quality indicators on Major Roads. Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

14 1 QUALITY OF SERVICE ASSESSMENT 1.1 GOAL To analyse the quality of telecommunications services, which are supported on Portuguese GSM/UMTS mobile networks, from the user s standpoint, by conducting automatic end-to-end tests. 1.2 ANALYZED SERVICES The services that present high usage levels by consumers in general, for each technology, were analysed SERVICE INDEPENDENT (GSM/WCDMA): a. Network Coverage; TELEPHONY SERVICES (GSM/UMTS): b. Voice Service (GSM); c. Video-telephony Service (UMTS); 14 QoS - Mobile Networks and Services / GSM-UMTS

15 2 METHODOLOGY The methodology is based on the performance of end-to-end automatic testes, thus making it possible to identity the quality of service on the field, giving the most realistic perspective of the networks performance as possible, from the user s standpoint. Measurement collection is made using drive-testes. Besides providing an assessment from the user s standpoint, this approach makes it possible to have the test made independently from the correct functioning of the networks themselves. On the other hand, the use of a sole testing system to asses the services provided by the three mobile networks, makes the results highly comparable, regarding time and space. This approach also considers zones with bad or non-existent coverage in the assessment of mobile networks quality of service. 2.1 FUNDAMENTALS This study s methodology is based on three basic aspects: a) End-to-end measurements: measurements reflect all aspects that impact a quality of a service; b) Impartiality: Measurements are carried out under equal terms for the three operators (, and ); c) Objectivity: Tests are carried out in a totally automatic way, eliminating the subjectivity inherent to human intervention or decision. 2.2 QOS INDICATORS From the user s standpoint, the use of mobile services represents the following stages (different features of the Quality of Service): a. Network Access Shows that the mobile network is present and that it is possible to use the services (usually it corresponds to the indication of the network s name on the screen of the Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

16 terminal equipment); b. Service Access When the user intends to use a service, the mobile operator should provide the access to that services the fastest way possible (e.g. to establish a voice call); c. Service Integrity Corresponds to the Quality of Service (QoS) during its use (e.g. Audio Quality during a voice call); d. Service Consistency Corresponds to the way how the use of the service is ended (according or not to the user s will). The mains Quality of Service Indicators were analyzed for each of the QoS features SERVICE INDEPENDENT AVAILABILITY OF THE RADIO-ELECTRIC NETWORK (COVERAGE) Probability of the mobile services being available to a user (network coverage). No.of Measurements with Available Mobile Services Availabili ty of the Radio - electric Network Total No.of Measurements [%] = 10 Mobile services are considered to be available when the radio-electric signal shows values above the minimum levels that make its use possible. The testing and measurement system used, through a RF Scanner, continuously measures each network s signal levels. These measurements are geographically referenced, thus allowing for their representation on maps, making it easy to visualize the coverage levels of mobile networks on the routes under study. Table 1 Coverage Levels Coverage GSM WCDMA Good RxLev 85 dbm CPICH RSCP 95 dbm Acceptable 95 dbm RxLev < 85 dbm 105 dbm CPICH RSCP < 95 dbm Bad 110 dbm RxLev < 95 dbm 115 dbm CPICH RSCP < 105 dbm Non-existent RxLev < 110 dbm CPICH RSCP < 115 dbm 16 QoS - Mobile Networks and Services / GSM-UMTS

17 2.2.2 TELEPHONY SERVICES SERVICE ACCESSIBILITY (VOICE OR VIDEO-TELEPHONY) Probability that the user has of having access to the service (voice or video-telephony), i.e., success probability when establishing a (voice or video-telephony) call. It is considered that a call was Established with Success if it reaches the called terminal (on hears the calling signal on the calling terminal). No.of Calls Established with Success Service Accessibility Total No.of Attempts to Establish Calls [%] = TIME TO ESTABLISH A CALL (VOICE OR VIDEO-TELEPHONY) Period of time elapsing from the sending of a complete destination (destination telephone number) and the establishment of the call. [ s] Time to Establish Call = t - 2 t 1 t1 moment when the user presses the send button. t2 moment when the call is successfully established (one hears the calling signal on the caller terminal) CALL TERMINATION RATE (VOICE OR VIDEO-TELEPHONY) Probably of a call being maintained, after being established, during a given period of time, ending normally, i.e., according to the user s will. No.of Calls wirh Normal Termination CallTer min ationrate No.of Calls Established with Success [%] = CALL AUDIO QUALITY (VOICE OR VIDEO-TELEPHONY) This indicator quantifies how well the conversation is perceived during a (voice or video-telephony) call. Only calls with normal termination are considered for the reckoning of this indicator. CallAudioQuality = f(mos_ side A CallAudioQUality = f(mos_ side B LQO LQO ) ) Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

18 side A refers to the quality perceived on the side of the mobile terminal (which is moving on the locations under analysis). side B refers to the quality perceived from the side of the ISDN fixed terminal, in the case of voice calls, or from the side of the mobile terminal, motionless, in the case of video-telephony calls. MOS_LQO Perceived Audio Quality quantification scale (Mean Opinion Score_Listening Quality Objective). PESQ 1 and SQuad-LQ 2 where the reckoning algorithms used for voice and video-telephony calls, respectively. The MOS scale quantifies the effort that it takes to understand a conversation. Its value is 0 (zero) when there is no communication and 5 (five) when the communication is perfect. Value zero never shows on the results since they only consider situations where the connection was established and maintained during a given period. Five also never shows on the results because the CoDec 3, used by mobile networks, do not make possible the existence of such high voice or video quality values (the voice or video quality reached with the usually used CoDec presents MOS values lower than 4.5). Table 2 MOS Scale MOS Quality 5 Excellent 4 Good 3 Acceptable 2 Poor 1 Bad VIDEO-TELEPHONY CALL VIDEO QUALITY Quantifies the communication s video quality using the VQuad 4 algorithm developed by SwissQual. Only calla that ender normally are considered in the reckoning of this indicator. Qualidade Vídeo de Chamada = f(mos) MOS Perceived video quality quantification scale (Mean Opinion Score_Video Quality Objective). The MOS scale present the levels already indicated on Table 2. 1 PESQ Perceptual Evaluation of Speech Quality. Recommended by ITU-International Telecommunications Union (ITU-T Recommendation P.862 (02/2001); ITU-T Recommendation P (11/2003)). 2 SQuad-LQ SwissQual s speech quality algorithm for Listening Quality. 3 CoDec Codifier/De-codifier. 4 VQuad Objective Model for Video Quality Assessment. 18 QoS - Mobile Networks and Services / GSM-UMTS

19 Figure 13 VQuad algorithm functional diagram Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

20 2.3 MEASUREMENT PROFILES 5 Tests are conducted in a fully automatic way and using the Seven.Five system (there is no human intervention or decision during the conduction of a test). Measurements are carried out in moving vehicles and with outdoor antennas (without gain); Voice tests are made with manual selection of the 2G (GSM) infrastructure, while video-telephony tests are made with automatic selections of the 2G or 3G (GSM/UMTS) infrastructure; All collected parameters are geographically referenced and can be later represented on digital cartography COVERAGE Network coverage assessment is made by the continuous measurement of the signal levels of each mobile network, along each analyzed route. Measurements are made through a RF Scanner, so the signal levels measures correspond to the effective levels on each point. Signal samples are collected from all the radio-electric channels used by the three mobile operators, approximately every second for the GSM technology, and every two and a half seconds of the WCDMA 6 technology. These signal samples sample are later analyzed and only the best results obtained on each measurement point are considered in the GSM coverage and WCDMA coverage indicators TELEPHONY SERVICES VOICE SERVICE To analyze the voice service, test calls are made between mobile terminal equipment and terminal 5 The measurements profile presented here are supported on the technical specifications ETSI TS , namely on part 5 (ETSI TS V1.3.1 ( )), and ETSI EG , namely parts 3 and 4 (ETSI EG V1.1.1 ( ) and ETSI EG V1.1.1 ( )). 6 Wideband Code Division Multiple Access Technology used on the radio-electric network of the UMTS communications systems. 20 QoS - Mobile Networks and Services / GSM-UMTS

21 equipment of a fixed network (ISDN). These calls are named MOC when they are originated on the mobile network and terminated on the fixed network, and MTC, when they are originated on the fixed terminal and ended on the mobile terminal. The mobile terminal equipment moves along the studied route. The time frames for making the calls are started simultaneously for the three operators. After the call is established, the communication s audio quality is analyzed, on both ends, according the PESQ algorithm. Test Parameters: Relationship between MOC/MTC: 1/1; Duration of the test calls: 120 seconds; Time frame for making a test call: 180 seconds; Maximum time to establish a call: 20 seconds VIDEO-TELEPHONY SERVICE To analyse the video-telephony service, test calls are made between mobile terminal equipment. One of the terminals is kept motionless, on a location with proper coverage, while the other terminal moves along the location under analysis. These calls are named MOC when they are originated on the mobile network that is moving and terminated on motionless terminal. On the opposite situation, the calls are named MTC. The time frames for making the calls are started simultaneously for the three operators. After the call is established, the communication s audio quality is analyzed, on both ends, according the SQuad-LQ and VQuad algorithms (algorithms owned by SwissQual, the supplier of the used testing a measurement equipment). Test Parameters: Relationship between MOC/MTC: 1/1; Duration of the test calls: 120 seconds; Time frame for making a test call: 210 seconds; Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

22 Maximum time to establish a call: 20 seconds. Maximum time to establish the audio/video call: 20 seconds. 2.4 TEST/MEASUREMENT AND POST-PROCESSING SYSTEM The Seven.Five/NetQual system, recently purchase by ANACOM, was used for measurements on the field and for their post-processing. Figure 14 Seven.Five/NetQual System Architecture 22 QoS - Mobile Networks and Services / GSM-UMTS

23 3 STUDY SAMPLE A sample representing the use of these services in Mainland Portugal was chosen for a proper assessment of the quality of Voice (GSM), Video-telephony (UMTS) and Network Coverage (GSM and UMTS) services. 3.1 TESTED AREAS This study aims to assess the quality of the services provided by mobile networks, as it is perceived by consumers. It would be thus be desirable to conduct measurements in all location where this type of communications is or could be provided, at the limit, considering the whole of Portugal s geographical area, including the interior of buildings. Understandably, making tests on all these locations is unfeasible. However, the purpose is not to make exhaustive measures, but to collect an adequate sample that can be used as an indicator of the networks overall performance. In this sense, locations where the service is more intensely used were chosen, i.e., the larger urban agglomerations and the major roads. However, the exclusive adoption of this criterion would lead to an excessive concentration of measurements in the coastline s most densely populated areas, and therefore, besides this criterion, we decided to consider a geographical distribution of the locations, as a way to contemplate inland regions. Thus, tests were made in all of the country s district capitals, thereby broadening the collection area to the greatest Lisbon and Porto areas, and also to the major roads of Mainland Portugal. The population of the urban agglomerations that make up the selected sample stand for 41.7% of the Portuguese population, according to the results of the last Census (2001). Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

24 Table 3 Locations and corresponding population. Territorial Unit Aveiro Beja Braga Bragança Castelo Branco Coimbra Évora Faro Guarda Leiria Portalegre Santarém Setúbal Viana do Castelo Vila Real Viseu Resident Population Present Population 73,136 76,415 35,659 37, , ,048 34,689 37,170 55,909 56, , ,039 56,359 58,564 57,151 59,527 43,759 44, , ,065 25,814 26,511 63,418 63, , ,227 88,409 86,355 49,928 52,129 93,259 93,041 Total 1,222,392 1,246,071 Greater Porto Porto 262, ,790 Gondomar 163, ,547 Maia 119, ,539 Matosinhos 166, ,671 Vila Nova de Gaia 287, ,466 Total 999, ,013 Greater Lisbon Lisbon 556, ,248 Amadora 174, ,507 Cascais 168, ,539 Loures 198, ,320 Oeiras 160, ,152 Sintra 363, ,976 Almada 159, ,746 Seixal 150, ,843 Odivelas 132, ,569 Total 2,065,416 2,031,900 Source: INE - Instituto Nacional de Estatística Overall Total 4,287,788 4,264, QoS - Mobile Networks and Services / GSM-UMTS

25 Table 4 Major Roads Major Roads Lisbon-Cascais-Sintra-Lisbon (A5 / IC19) Approximate Distance (Km) 60 Lisbon-Porto (A1) 325 Oeiras-Castelo Branco-Guarda (A9 / A1 / A23) 330 Lisbon-Vila Real de Sto. António (A2 / A22) 320 Vila Real de S to. António-Faro-Lagos (EN 125) 130 Lisbon-Évora-Elvas (A2 / A6) 210 Lisbon-Leiria (A8) 140 Porto-Braga-Valença-Viana do Castelo-Porto (A3 / IC1) 240 Porto-Bragança (A4 / IP4) 240 Aveiro-Viseu-Vilar Formoso (IP5 / A25) 200 Vila Real-Figueira da Foz (IP3 / A24 / A14) 215 Total 2, SAMPLE SIZE Table 5 Sample, for the three analyzed operators. Major Roads Urban Agglomerations Hours of Measurements Voice Calls Video-telephony Calls Coverage Measurements GSM WCDMA Measurements in Kilometers Aveiro 6 h ,488 27, Beja 6 h ,808 25, Braga 6 h ,925 26, Bragança 6 h ,269 27, Castelo Branco 6 h ,616 25, Coimbra 6 h ,272 27, Évora 6 h ,760 22, Faro 6 h ,339 23, Guarda 6 h ,416 26, Leiria 6 h ,823 26, Portalegre 6 h ,808 26, Santarém 6 h ,750 26, Setúbal 6 h ,940 26, Viana do Castelo 6 h ,866 26, Vila Real 6 h ,303 26, Viseu 6 h ,133 26, Greater Porto 18 h 23 1, ,251 78, Greater Lisbon 36 h 08 2,129 1, , , Urban Agglomerations Total 154 h 13 9,075 7,903 1,683, ,435 3,713 Lisbon-Cascais-Sintra-Lisbon (A5 / IC19) 6 h ,635 28, Lisbon-Porto (A1) 6 h ,308 27, Oeiras-Castelo Branco-Guarda (A9 / A1 / A23) 6 h ,022 23, Lisbon-Vila Real de Sto. António (A2 / A22) 6 h ,945 27, Vila Real de Sto. António-Faro-Lagos (EN125) 4 h ,939 20, Lisbon-Évora-Elvas (A2 / A6) 4 h ,490 15, Lisbon-Leiria (A8) 3 h ,691 12, Porto-Braga-Valença-Viana do Castelo-Porto (A3 / IC1) 5 h ,911 21, Porto-Bragança (A4 / IP4) 5 h ,442 24, Aveiro-Vilar Formoso (IP5 / A25) 3 h ,451 16, Vila Real-Figueira da Foz (IP3 / A24 / A14) 5 h ,300 21, Major Roads Totaç 58 h 09 3,405 2, , ,120 5,076 Overall Total 212 h 22 12,480 10,873 2,311, ,555 8,789 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

26 3.3 DATA COLLECTION CONDITIONS The field work took place on working days between 13 November and 20 December. In the Greater Lisbon and Greater Porto regions, measurement sessions were made from 8h00 to 12h00 and from 16h00 to 20h00. In the remaining urban agglomerations, measurement sessions were made during normal hours on working days. On each major road, data collection was made in two series of runs, except for the A5/IC19 route, where several runs were made along one day (6h30). 26 QoS - Mobile Networks and Services / GSM-UMTS

27 4 AGGREGATED RESULTS 4.1 URBAN AGGLOMERATIONS VOICE SERVICE (GSM) Calls Made Calls Establishment Audio Quality Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Number of Calls 1,539 1,496 1,537 1,495 1,525 1,483 Dropped on Establishment Dropped during Call With Normal Termination 1,521 1,475 1,499 1,458 1,512 1,465 Service Accessibility 99.5% 99.3% 98.6% 98.4% 99.7% 99.2% Call Termination Rate 99.3% 99.3% 98.9% 99.1% 99.5% 99.6% Number of Samples (Calls) 1,532 1,486 1,516 1,471 1,520 1,471 Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 2,995 2,996 2,956 2,957 2,977 2,977 Average Maximum Minomum Standard Deviation Precision Error Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Service Accessibility 0.5% 0.6% 0.7% 0.8% 0.4% 0.6% Call Termination Rate 0.6% 0.6% 0.7% 0.6% 0.5% 0.5% Time to Establish a Call Audio Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATORS Voice Service Mobile Fixed Voice Service Fixed Mobile % 98.6% 99.7% 99.3% 98.9% 99.5% % 98.4% 99.2% 99.3% 99.1% 99.6% Service Accessibility Call Termination Rate Service Accessibility Call Termination Rate Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

28 TIME TO ESTABLISH A CALL INDICATOR [s] Time to Establish a Call Mobile Fixed [s] Time to Establish a Call Fixed Mobilel VOICE CALL AUDIO QUALITY INDICATOR Voice Calls Audio Quality Mobile Fixed Voice Calls Audio Quality Fixed Mobile FUNCTION DENSITY PROBABILITY OF THE VOICE CALL AUDIO QUALITY INDICATOR 10 1 Voice Calls Audio Quality - Function Probabiliy Density Mobile Fixed 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 28 QoS - Mobile Networks and Services / GSM-UMTS

29 10 1 Voice Calls Audio Quality - Function Probabiliy Density Fixed Mobile 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5, FUNCTION CUMULATIVE DISTRIBUTION OF THE VOICE CALL AUDIO QUALITY INDICATOR 10 1 Voice Calls Audio Quality - Function Cumulative Distribution Mobile Fixed 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, Voice Calls Audio Quality - Function Cumulative Distribution Fixed Mobile 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4,5 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

30 4.1.2 VIDEO-TELEPHONY SERVICE (UMTS) Calls Made Calls Establishment Video Quality Audio Quality Number of Calls 2,631 2,623 2,649 Dropped on Establishment Dropped during Call With Normal Termination 2,339 2,112 2,411 Service Accessibility 90.5% 83.7% 94.1% Call Termination Rate 98.2% 96.2% 96.7% Number of Samples (Calls) 2,382 2,195 2,493 Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 4,668 4,199 4,813 Average Maximum Minomum Standard Deviation Number of Samples (Calls) 4,659 4,183 4,803 Average Maximum Minomum Standard Deviation Precision Error Service Accessibility 1.2% 1.5% 1. Call Termination Rate 0.6% 0.9% 0.8% Time to Establish a Call Audio Quality Video Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATOR Video-telephony Service % 90.5% 83.7% Service Accessibility 98.2% 96.2% 96.7% Call Termination Rate 30 QoS - Mobile Networks and Services / GSM-UMTS

31 TIME TO ESTABLISH A CALL INDICATOR [s] Time to Establish a Call VIDEO-TELEPHONY CALL AUDIO QUALITY Video-telephony Calls Audio Quality FUNCTION DENSITY PROBABILITY OF THE VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR 10 1 Video-telephony Calls Audio Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

32 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR 10 1 Video-telephony Calls Audio Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, VIDEO-TELEPHONY CALL VIDEO QUALITY DE INDICATOR Video-telephony Calls Audio Quality FUNCTION DENSITY PROBABILITY OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 32 QoS - Mobile Networks and Services / GSM-UMTS

33 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, NETWORK COVERAGE Coverage GSM WCDMA Number of Samples (Measurements) 557, , , , , ,296 Average Signal Level [dbm] Maximum Signal Level [dbm] Maximum Signal Level [dbm] Standard Deviation [dbm] Good % 97.2% 99.2% Acceptable % Bad % 0.5% 0. Non-existent % GSM % 0. Coverage GSM Good Acceptable Bad Non-existent Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

34 GSM FUNCTION PROBABILITY DENSITY Coverage - Function Density Probability GSM Signal Level - RxLev [dbm] GSM - FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution GSM Signal Level - RxLev [dbm] WCDMA % 97.2% 99.2% 1. Coverage WCDMA % 0.1% 0.5% % 0. Good Acceptable Bad Non-existent 34 QoS - Mobile Networks and Services / GSM-UMTS

35 WCDMA - FUNCTION PROBABILITY DENSITY Coverage - Function Density Probability WCDMA Signal Level - CPICH RSCP [dbm] WCDMA - FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution WCDMA Signal Level - CPICH RSCP [dbm] Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

36 4.2 MAJOR ROADS VOICE SERVICE (GSM) Calls Made Calls Establishment Audio Quality Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Number of Calls Dropped on Establishment Dropped during Call With Normal Termination Service Accessibility 99.3% 99.3% 99.1% % 98.7% Call Termination Rate 98.3% 98.2% 98.8% 98.2% 99.3% 99.1% Number of Samples (Calls) Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 1,107 1,108 1,105 1,105 1,111 1,111 Average Maximum Minomum Standard Deviation Erro de Precisão Móvel Fixo Fixo Móvel Móvel Fixo Fixo Móvel Móvel Fixo Fixo Móvel Service Accessibility 1.1% 1.1% 1.1% 1.5% 1.1% 1.3% Call Termination Rate 1.4% 1.5% 1.3% 1.5% 1.1% 1.2% Time for Establishing a Call Audio Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATORS Voice Service Mobile Fixed Voice Service Fixed Mobile % 99.1% 99.3% 98.3% 98.8% 99.3% Service Accessibility Call Termination Rate % % 98.2% 98.2% 99.1% Service Accessibility Call Termination Rate 36 QoS - Mobile Networks and Services / GSM-UMTS

37 TIME TO ESTABLISH A CALL INDICATOR [s] Time to Establish a Call Mobile Fixed [s] Time to Establish a Call Fixed Mobile VOICE CALL AUDIO QUALITY INDICATOR Voice Calls Audio Quality Mobile Fixed Voice Calls Audio Quality Fixed Mobile FUNCTION PROBABILITY DENSITY OF THE VOICE CALL AUDIO QUALITY INDICATOR 10 1 Voice Calls Audio Quality - Function Probability Density Mobile Fixed 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

38 10 1 Voice Calls Audio Quality - Function Probability Density Fixed Mobile 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5, FUNCTION CUMULATIVE DISTRIBUTION OF THE CALL AUDIO QUALITY INDICATOR 10 1 Voice Calls Audio Quality - Function Cumulative Distribution Mobile Fixed 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, Voice Calls Audio Quality - Function Cumulative Distribution Fixed Mobile 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4,5 38 QoS - Mobile Networks and Services / GSM-UMTS

39 4.2.2 VIDEO-TELEPHONY (UMTS) Calls Made Calls Establishment Video Quality Audio Quality Number of Calls Dropped on Establishment Dropped during Call With Normal Termination Service Accessibility 56.7% 64.8% 67.9% Call Termination Rate 95.5% % Number of Samples (Calls) Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 1,058 1,175 1,224 Average Maximum Minomum Standard Deviation Number of Samples (Calls) 1,056 1,169 1,222 Average Maximum Minomum Standard Deviation Precision Error Service Accessibility 3.2% 3.1% 3. Call Termination Rate 2.1% 2.3% 2.5% Time to Establish a Call Audio Quality Video Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATORS Video-telephony Service % 64.8% 56.7% Service Accessibility 95.5% % Call Termination Rate Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

40 TIME TO ESTABLISH A CALL INDICATOR [s] 35 Time to Establish a Call VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR Video-telephony Calls Video Quality FUNCTION PROBABILITY DENSITY OF THE VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR 10 1 Video-telephony Calls Audio Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 40 QoS - Mobile Networks and Services / GSM-UMTS

41 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR 10 1 Video-telephony Calls Audio Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR Video-telephony Calls Video Quality FUNCTION PROBABILITY DENSITY OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

42 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, NETWORK COVERAGE Coverage GSM WCDMA Number of Samples (Measurements) 208, , ,765 80,160 79,308 79,652 Average Signal Level [dbm] Maximum Signal Level [dbm] Maximum Signal Level [dbm] Standard Deviation [dbm] Good 99.9% 99.9% 99.8% 69.8% 75.4% 76.8% Acceptable 0.1% 0.1% 0.1% 12.8% 10.6% 10.5% Bad % 6.2% 5. Non-existent % 7.8% 7.7% GSM % 99.9% 99.8% 0.1% Coverage GSM 0.1% 0.1% Good Acceptable Bad Non-existent 42 QoS - Mobile Networks and Services / GSM-UMTS

43 GSM FUNCTION PROBABILITY DENSITY Coverage - Function Probability Density GSM Signal Level - RxLev [dbm] GSM FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution GSM Signal Level - RxLev [dbm] WCDMA Coverage WCDMA % 75.4% 76.8% 12.8% 10.6% 10.5% 7.1% 6.2% % 7.8% 7.7% Good Acceptable Bad Non-existent Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

44 WCDMA FUNCTION PROBABILITY DENSITY Coverage - Function Probability Density WCDMA Signal Level - CPICH RSCP [dbm] WCDMA FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution WCDMA Signal Level - CPICH RSCP [dbm] 44 QoS - Mobile Networks and Services / GSM-UMTS

45 4.3 GLOBAL VOICE SERVICE (GSM) Calls Made Calls Establishment Audio Quality Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Number of Calls 2,115 2,056 2,115 2,055 2,098 2,041 Dropped on Establishment Dropped during Call With Normal Termination 2,083 2,021 2,065 1,997 2,077 2,011 Service Accessibility 99.5% 99.3% 98.8% 98.3% 99.6% 99.1% Call Termination Rate % 98.9% 99.4% 99.5% Number of Samples (Calls) 2,104 2,042 2,089 2,020 2,089 2,022 Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 4,102 4,104 4,061 4,062 4,088 4,088 Average Maximum Minomum Standard Deviation Precision Error Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Mobile Fixed Fixed Mobile Service Accessibility 0.4% 0.5% 0.6% 0.7% 0.4% 0.5% Call Termination Rate 0.5% 0.5% 0.6% 0.6% 0.4% 0.4% Time to Establish a Call Audio Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATORS Voice Service Mobile Fixed Voice Service Fixed Mobile % 98.8% 99.6% % 99.4% Service Accessibility Call Termination Rate % 98.3% 99.1% % 99.5% Service Accessibility Call Termination Rate Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

46 TIME TO ESTABLISH A CALL INDICATOR [s] Time to Establish a Call Mobile Fixed [s] Time to Establish a Call Fixed Mobile VOICE CALL AUDIO QUALITY INDICATOR Voice Calls Audio Quality Mobile Fixed Voice Calls Audio Quality Fixed Mobile FUNCTION PROBABILITY DENSITY OF THE VOICE CALL AUDIO QUALITY INDICATOR 10 1 Voice Calls Audio Quality - Funtion Probability Density Mobile Fixed 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 46 QoS - Mobile Networks and Services / GSM-UMTS

47 10 1 Qualidade Áudio das Chamadas de Voz - Função Densidade de Probabilidade Fixo Móvel 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5, FUNCTION CUMULATIVE DISTRIBUTION OF THE VOICE CALL AUDIO QUALITY I NDICATOR 10 1 Voice Calls Audio Quality - Funtion Cumulative Distribution Mobile Fixed 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4,5 tribution 10 1 Voice Calls Audio Quality - Funtion Cumulative Distribution Fixed Mobile 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4,5 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

48 4.3.2 VIDEO-TELEPHONY (UMTS) Calls Made Calls Establishment Video Quality Audio Quality Number of Calls 3,615 3,610 3,648 Dropped on Establishment Dropped during Call With Normal Termination 2,872 2,707 3,024 Service Accessibility 81.3% 78.5% 86.9% Call Termination Rate 97.7% 95.5% 95.4% Number of Samples (Calls) 2,940 2,835 3,171 Average Time [s] Maximum Time [s] Minimum Time [s] Standard Deviation [s] Number of Samples (Calls) 5,726 5,374 6,037 Average Maximum Minomum Standard Deviation Number of Samples (Calls) 5,715 5,352 6,025 Average Maximum Minomum Standard Deviation Precision Error Móvel Móvel Móvel Móvel Móvel Móvel Service Accessibility 1.3% 1.4% 1.1% Call Termination Rate 0.6% 0.8% 0.8% Time to Establish a Call Audio Quality Video Quality Confidence Level = 95 % SERVICE ACCESSIBILITY AND CALL TERMINATION RATE INDICATORS Video-telephony Service % 81.3% 78.5% Service Accessibility 97.7% 95.5% 95.4% Call Termination Rate 48 QoS - Mobile Networks and Services / GSM-UMTS

49 TIME TO ESTABLISH A CALL INDICATOR [s] 35 Time to Establish a Call VIDEO-TELEPHONY CALL AUDIO QUALITY INDICATOR Video-telephony Calls Audio Quality FUNCTION PROBABILITY DENSITY OF THE VIDEO-TELEPHONY CALL AUDIO QUALITY DE 10 1 Video-telephony Calls Audio Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

50 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY AUDIO QUALITY INDICATOR 10 1 Video-telephony Calls Audio Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, VIDEO-TELEPHONY CALL VIDEO QUALITY DE INDICATOR Video-telephony Calls Video Quality FUNCTION PROBABILITY DENSITY OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Probability Density 1,0-1,1 1,1-1,2 1,2-1,3 1,3-1,4 1,4-1,5 1,5-1,6 1,6-1,7 1,7-1,8 1,8-1,9 1,9-2,0 2,0-2,1 2,1-2,2 2,2-2,3 2,3-2,4 2,4-2,5 2,5-2,6 2,6-2,7 2,7-2,8 2,8-2,9 2,9-3,0 3,0-3,1 3,1-3,2 3,2-3,3 3,3-3,4 3,4-3,5 3,5-3,6 3,6-3,7 3,7-3,8 3,8-3,9 3,9-4,0 4,0-4,1 4,1-4,2 4,2-4,3 4,3-4,4 4,4-4,5 4,5-5,0 50 QoS - Mobile Networks and Services / GSM-UMTS

51 FUNCTION CUMULATIVE DISTRIBUTION OF THE VIDEO-TELEPHONY CALL VIDEO QUALITY INDICATOR 10 1 Video-telephony Calls Video Quality - Function Cumulative Distribution 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 1,8 1,9 2,0 2,1 2,2 2,3 2,4 2,5 2,6 2,7 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4,0 4,1 4,2 4,3 4,4 4, NETWORK COVERAGE Coverage GSM WCDMA Number of Samples (Measurements) 766, , , , , ,948 Average Signal Level [dbm] Maximum Signal Level [dbm] Maximum Signal Level [dbm] Standard Deviation [dbm] Good % % 93.1% Acceptable % 4.4% 3.4% Bad % Non-existent % 2.3% 2.1% GSM % 0. Coverage GSM Good Acceptable Bad Non-existent Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

52 GSM FUNCTION PROBABILITY DENSITY Coverage - Function Density Probability GSM Signal Level - RxLev [dbm] GSM FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution GSM Signal Level - RxLev [dbm] WCDMA Coverage WCDMA % 93.1% 4.2% 4.4% 3.4% % 2.8% 2.3% 2.1% Good Acceptable Bad Non-existent 52 QoS - Mobile Networks and Services / GSM-UMTS

53 WCDMA - FUNCTION PROBABILITY DENSITY Coverage - Function Density Probability WCDMA Signal Level - CPICH RSCP [dbm] WCDMA - FUNCTION CUMULATIVE DISTRIBUTION Coverage - Function Cumulative Distribution WCDMA Signal Level - CPICH RSCP [dbm] COVERAGE MAPS (Following pages) Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

54 MAINLAND PORTUGAL GSM Coverage 54 QoS - Mobile Networks and Services / GSM-UMTS

55 MAINLAND PORTUGAL GSM Coverage Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

56 MAINLAND PORTUGAL GSM Coverage 56 QoS - Mobile Networks and Services / GSM-UMTS

57 MAINLAND PORTUGAL WCDMA Coverage Survey of Voice, Video-telephony and Network Coverage Services / Nov.-Dec

58 MAINLAND PORTUGAL WCDMA Coverage 58 QoS - Mobile Networks and Services / GSM-UMTS