Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494276
S. Anbuchezian, M. Kori
The optimal utilization of the spectrum is the critical factor in the success of wireless communications. Right from the cellular concept many new techniques and technologies have influenced the course of optimal spectrum utilization. Some of the key issues and techniques used to enhance the channel capacity are reviewed.
{"title":"Key issues influencing spectral efficiency in wireless communications","authors":"S. Anbuchezian, M. Kori","doi":"10.1109/ICPWC.1996.494276","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494276","url":null,"abstract":"The optimal utilization of the spectrum is the critical factor in the success of wireless communications. Right from the cellular concept many new techniques and technologies have influenced the course of optimal spectrum utilization. Some of the key issues and techniques used to enhance the channel capacity are reviewed.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125529326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.493327
G. Delisle
The increasing interest in the development and eventual implementation of indoor radio systems in the millimeter wave frequency band has motivated research efforts with the objective of characterizing the channel at these frequencies. Measurements were conducted at 21.6 GHz, 37.2 GHz and 59.6 GHz using horn direction and omnidirectional antennas. Among the interesting parameters to be estimated, the received signal envelope, distance power law distribution, the cumulative distribution function of long and short term fading, edge diffraction and human absorption are the most important. For wideband systems, the behavior of the indoor channels within typical buildings must also be well understood. The acquisition of the experimental data requires valid experimental procedures to obtain the impulse responses, and the amplitude and phase profiles which can be interpreted in terms of the system parameters. This paper reports on some of the design guidelines for millimeter wave systems.
{"title":"Implementation of wideband indoor wireless systems at millimeter wave frequencies","authors":"G. Delisle","doi":"10.1109/ICPWC.1996.493327","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493327","url":null,"abstract":"The increasing interest in the development and eventual implementation of indoor radio systems in the millimeter wave frequency band has motivated research efforts with the objective of characterizing the channel at these frequencies. Measurements were conducted at 21.6 GHz, 37.2 GHz and 59.6 GHz using horn direction and omnidirectional antennas. Among the interesting parameters to be estimated, the received signal envelope, distance power law distribution, the cumulative distribution function of long and short term fading, edge diffraction and human absorption are the most important. For wideband systems, the behavior of the indoor channels within typical buildings must also be well understood. The acquisition of the experimental data requires valid experimental procedures to obtain the impulse responses, and the amplitude and phase profiles which can be interpreted in terms of the system parameters. This paper reports on some of the design guidelines for millimeter wave systems.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127644123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494281
A. Sanyal
The explosion of the wireless communication field has brought about new technologies and new applications for personal use of the microwave and higher bands of the radio spectrum. Especially, millimetre-wave communication systems have found an important place in personal wireless communication systems. The inherent advantages of the millimetre-wave bands are being used very effectively in personal wireless communication networks. Commercial systems which are already deployed in such networks are reviewed. The induction of personal wireless communication networks in a developing country like India is examined.
{"title":"Millimetre-wave solutions for personal communication network","authors":"A. Sanyal","doi":"10.1109/ICPWC.1996.494281","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494281","url":null,"abstract":"The explosion of the wireless communication field has brought about new technologies and new applications for personal use of the microwave and higher bands of the radio spectrum. Especially, millimetre-wave communication systems have found an important place in personal wireless communication systems. The inherent advantages of the millimetre-wave bands are being used very effectively in personal wireless communication networks. Commercial systems which are already deployed in such networks are reviewed. The induction of personal wireless communication networks in a developing country like India is examined.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134347139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494280
M. Silventoinen, M. Kuusela, P. Ranta
This paper addresses the problem of allocating frequencies in a GSM-based home base station (HBS) system. A novel solution called total frequency hopping (TFH) is presented in order to overcome the frequency allocation and the inter-HBS synchronisation problems. The HBS system will use the same frequency band as the overlaying GSM network and thus result in more interference. The simulation results reveal that the negative impact of the underlying HBS system to the GSM network performance is minimal.
{"title":"Total frequency hopping for home base stations","authors":"M. Silventoinen, M. Kuusela, P. Ranta","doi":"10.1109/ICPWC.1996.494280","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494280","url":null,"abstract":"This paper addresses the problem of allocating frequencies in a GSM-based home base station (HBS) system. A novel solution called total frequency hopping (TFH) is presented in order to overcome the frequency allocation and the inter-HBS synchronisation problems. The HBS system will use the same frequency band as the overlaying GSM network and thus result in more interference. The simulation results reveal that the negative impact of the underlying HBS system to the GSM network performance is minimal.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134593564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494270
A. Saha, T. Vasanthi
We propose a scheme for providing digital packet data services in an existing aviation communication system. The system, currently in operation in the continental United States, offers basic telephony services to airborne subscribers-two way voice, fax and data. The mobiles are mounted on commercial aircraft and communicate with the terrestrial network using digital phase modulated radio communication in the 840 MHz-890 MHz range. The system is thus cheaper and less power-intensive than satellite based systems, and easy to install, maintain, operate and upgrade. The scheme we propose would provide the full gamut of packet data services to this system. This would include the facility of channel sharing and bandwidth allocation according to load, seamless handovers between cells and transparent access to the Internet and the terrestrial CDPD network. The goal is to utilize the available limited traffic carrying capacity of the system to the maximum without compromising on service quality.
{"title":"A proposal for digital packet data services for a commercial aviation communication system","authors":"A. Saha, T. Vasanthi","doi":"10.1109/ICPWC.1996.494270","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494270","url":null,"abstract":"We propose a scheme for providing digital packet data services in an existing aviation communication system. The system, currently in operation in the continental United States, offers basic telephony services to airborne subscribers-two way voice, fax and data. The mobiles are mounted on commercial aircraft and communicate with the terrestrial network using digital phase modulated radio communication in the 840 MHz-890 MHz range. The system is thus cheaper and less power-intensive than satellite based systems, and easy to install, maintain, operate and upgrade. The scheme we propose would provide the full gamut of packet data services to this system. This would include the facility of channel sharing and bandwidth allocation according to load, seamless handovers between cells and transparent access to the Internet and the terrestrial CDPD network. The goal is to utilize the available limited traffic carrying capacity of the system to the maximum without compromising on service quality.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129147553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494269
A. Prasad, B. Stavrov, F. Schoute
A number of findings from detailed studies of traffic measurements from different packet networks have brought up a surprising discrepancy between the traditional traffic modelling techniques and the actual network traffic. The studies have shown the actual network traffic to be statistically self-similar with significant implications for the design of future multi-service integrated networks. This new traffic feature can be effectively captured within fractal models like: fractional Brownian motion (fBm) and fractional ARIMA processes. Although these formal mathematical models provide an elegant solution to the modelling of the self-similar phenomena, an comprehensive queuing analysis of these models is still lacking. Therefore simulations with synthetic self-similar input traffic are essential for gaining better understanding of the queuing problems and some initial experience with the performance of the future networks. Consequently fast generation of long traces of self-similar processes becomes an important task. We use an fBm generation method called the successive random addition (SRA) algorithm and carry out a rigorous statistical analysis on the generated traces. Our results show that the traces are indeed self-similar, although the parameters obtained may slightly differ from their target values. Our conclusion is that for qualitative studies the SRA algorithm provides a very good traffic source, whereas for quantitative analysis some caution is recommended. We also mention some possible applications of the algorithm in performance-related network implementations.
{"title":"Generation and testing of self-similar traffic in ATM networks","authors":"A. Prasad, B. Stavrov, F. Schoute","doi":"10.1109/ICPWC.1996.494269","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494269","url":null,"abstract":"A number of findings from detailed studies of traffic measurements from different packet networks have brought up a surprising discrepancy between the traditional traffic modelling techniques and the actual network traffic. The studies have shown the actual network traffic to be statistically self-similar with significant implications for the design of future multi-service integrated networks. This new traffic feature can be effectively captured within fractal models like: fractional Brownian motion (fBm) and fractional ARIMA processes. Although these formal mathematical models provide an elegant solution to the modelling of the self-similar phenomena, an comprehensive queuing analysis of these models is still lacking. Therefore simulations with synthetic self-similar input traffic are essential for gaining better understanding of the queuing problems and some initial experience with the performance of the future networks. Consequently fast generation of long traces of self-similar processes becomes an important task. We use an fBm generation method called the successive random addition (SRA) algorithm and carry out a rigorous statistical analysis on the generated traces. Our results show that the traces are indeed self-similar, although the parameters obtained may slightly differ from their target values. Our conclusion is that for qualitative studies the SRA algorithm provides a very good traffic source, whereas for quantitative analysis some caution is recommended. We also mention some possible applications of the algorithm in performance-related network implementations.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"404 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116030356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.493331
K. Lal, A. Tulsi, D. Agarwal
This paper describes the challenges to a developing nation in providing wireless personal communication. It deals with various technologies that are available for implementing such services, the path that the operators in other developed countries have taken, current scenario in developing nations and associated challenges. It also deals with possible ways in which a developing nation can evolve its network wherein it is able to provide wireless personal communication services. Provision of intelligent value added services can only be done with the help of a sophisticated telecommunication infrastructure. The legacy systems in most developing nations are old and inflexible. Further, an enormous amount of funds are required to replace and expand this infrastructure. This paper discusses some of these aspects.
{"title":"Wireless personal communication. Challenges for a developing nation","authors":"K. Lal, A. Tulsi, D. Agarwal","doi":"10.1109/ICPWC.1996.493331","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493331","url":null,"abstract":"This paper describes the challenges to a developing nation in providing wireless personal communication. It deals with various technologies that are available for implementing such services, the path that the operators in other developed countries have taken, current scenario in developing nations and associated challenges. It also deals with possible ways in which a developing nation can evolve its network wherein it is able to provide wireless personal communication services. Provision of intelligent value added services can only be done with the help of a sophisticated telecommunication infrastructure. The legacy systems in most developing nations are old and inflexible. Further, an enormous amount of funds are required to replace and expand this infrastructure. This paper discusses some of these aspects.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115452293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.493330
Y. Masuda
The subscription to cellular telephone systems in Japan doubles every year. Pagers are also very popular. In addition, a new personal communication service, the Personal Handy-phone System (PHS) has being started. The technology, market and some infrastructure products of these services are summarised.
{"title":"Personal communication services in Japan and some related infrastructure products","authors":"Y. Masuda","doi":"10.1109/ICPWC.1996.493330","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.493330","url":null,"abstract":"The subscription to cellular telephone systems in Japan doubles every year. Pagers are also very popular. In addition, a new personal communication service, the Personal Handy-phone System (PHS) has being started. The technology, market and some infrastructure products of these services are summarised.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132672595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494283
A. Khanduri, K.S. Praseeth
A common problem faced in the case of wireless to wireless subscriber calls in cellular networks is the voice degradation due to the double encoding/decoding performed at the air interfaces. The voice degradation is in terms of the voice quality and the significant amount of delay introduced in the voice path. We present some of the methods employed in the GMH2000 system for doing away with the extra encoding/decoding step and the problems associated with this. To overcome this problem in the GMH2000 system the intermediate decoding/encoding at the base stations (BSSs) is avoided by setting up a transparent data channel between the 2 BSSs for transparently carrying the compressed voice packaged in inband messages, over the regular 64 kbps bit stream. This channel is setup once the call has been completely setup between the 2 subscribers and no more switch intervention is needed.
{"title":"Avoidance of double encoding and decoding in digital cellular network","authors":"A. Khanduri, K.S. Praseeth","doi":"10.1109/ICPWC.1996.494283","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494283","url":null,"abstract":"A common problem faced in the case of wireless to wireless subscriber calls in cellular networks is the voice degradation due to the double encoding/decoding performed at the air interfaces. The voice degradation is in terms of the voice quality and the significant amount of delay introduced in the voice path. We present some of the methods employed in the GMH2000 system for doing away with the extra encoding/decoding step and the problems associated with this. To overcome this problem in the GMH2000 system the intermediate decoding/encoding at the base stations (BSSs) is avoided by setting up a transparent data channel between the 2 BSSs for transparently carrying the compressed voice packaged in inband messages, over the regular 64 kbps bit stream. This channel is setup once the call has been completely setup between the 2 subscribers and no more switch intervention is needed.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129417385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-02-19DOI: 10.1109/ICPWC.1996.494288
A. Ghose, J. Vasant
In India, with the launch of INSAT-2C satellite which carries cross-strapped transponders in C and S band, India's own Mobile Satellite Service (MSS) has become possible. This paper carries out a comparative analysis of INSAT-MSS with similar services on a worldwide basis, keeping in view the newer technologies that are emerging in this field.
{"title":"Mobile and portable communication using INSAT satellite","authors":"A. Ghose, J. Vasant","doi":"10.1109/ICPWC.1996.494288","DOIUrl":"https://doi.org/10.1109/ICPWC.1996.494288","url":null,"abstract":"In India, with the launch of INSAT-2C satellite which carries cross-strapped transponders in C and S band, India's own Mobile Satellite Service (MSS) has become possible. This paper carries out a comparative analysis of INSAT-MSS with similar services on a worldwide basis, keeping in view the newer technologies that are emerging in this field.","PeriodicalId":117877,"journal":{"name":"1996 IEEE International Conference on Personal Wireless Communications Proceedings and Exhibition. Future Access","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129628401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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