Future mobile networks will have to provide enhanced services to increasing numbers of mobiles at low cost and in a competitive environment. To answer this challenge, network operators will need an advanced toolset of network control techniques, and this paper describes the research by Mobile VCE (Virtual Centre of Excellence) to provide these.
{"title":"Future mobile networks","authors":"J. Irvine, R. Tafazolli, I. Groves","doi":"10.1049/ECEJ:20000604","DOIUrl":"https://doi.org/10.1049/ECEJ:20000604","url":null,"abstract":"Future mobile networks will have to provide enhanced services to increasing numbers of mobiles at low cost and in a competitive environment. To answer this challenge, network operators will need an advanced toolset of network control techniques, and this paper describes the research by Mobile VCE (Virtual Centre of Excellence) to provide these.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121198713","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}
{"title":"Mobile internet: making it a success","authors":"P. Ramsdale","doi":"10.1049/ecej:20000601","DOIUrl":"https://doi.org/10.1049/ecej:20000601","url":null,"abstract":"","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128099222","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}
Future multimedia and Internet services will have more complex characteristics than the traditional service types. Accurate planning of mobile networks requires accurate prediction of traffic flows, which involves complex relationships between the services themselves, the mobility of users, and the business environment. This paper describes the work of the Mobile VCE services programme on new traffic models that take all three factors into account.
{"title":"Modelling mobile multimedia services","authors":"N. Jefferies, A. Munro, J. Irvine, S. Hope","doi":"10.1049/ECEJ:20000605","DOIUrl":"https://doi.org/10.1049/ECEJ:20000605","url":null,"abstract":"Future multimedia and Internet services will have more complex characteristics than the traditional service types. Accurate planning of mobile networks requires accurate prediction of traffic flows, which involves complex relationships between the services themselves, the mobility of users, and the business environment. This paper describes the work of the Mobile VCE services programme on new traffic models that take all three factors into account.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128671675","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}
Mobile phones of the future will be the access terminals to many different types of service. This will mean that they must be able to reconfigure themselves to support the differing service requirements placed upon them. At the root of this ability to reconfigure must be components and architectures that allow such flexibility, and so the key objective of the work programme on terminals within the Virtual Centre of Excellence in Mobile and Personal Communications (Mobile VCE) has been the design, definition and performance evaluation of key components and architectures for future generation reconfigurable terminals.
{"title":"Reconfigurable terminals for mobile communication systems","authors":"M. Barnard, S. McLaughlin","doi":"10.1049/ECEJ:20000607","DOIUrl":"https://doi.org/10.1049/ECEJ:20000607","url":null,"abstract":"Mobile phones of the future will be the access terminals to many different types of service. This will mean that they must be able to reconfigure themselves to support the differing service requirements placed upon them. At the root of this ability to reconfigure must be components and architectures that allow such flexibility, and so the key objective of the work programme on terminals within the Virtual Centre of Excellence in Mobile and Personal Communications (Mobile VCE) has been the design, definition and performance evaluation of key components and architectures for future generation reconfigurable terminals.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"248 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113993863","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}
As the Virtual Centre of Excellence in Mobile and Personal Communications (Mobile VCE) moves into its second core research programme it has been decided to set up a fourth generation (4G) Visions Group aimed at harmonising the research work across the work areas and amongst the numerous researchers working on the programme. This paper outlines the initial work of the group and provides a start to what will become an evolving vision of 4G. A short history of previous generations of mobile communications systems and a discussion of the limitations of third generation (3G) systems are followed by a vision of 4G for 2010 based around five elements: fully converged services, ubiquitous mobile access, diverse user devices, autonomous networks and software dependency. This vision is developed in more detail from a technology viewpoint into the key areas of networks and services, software systems and wireless access. It has been based upon a set of user scenarios that have been developed elsewhere in the Mobile VCE but which are summarised in the paper.
{"title":"Visions of 4G","authors":"B. Evans, K. Baughan","doi":"10.1049/ECEJ:20000608","DOIUrl":"https://doi.org/10.1049/ECEJ:20000608","url":null,"abstract":"As the Virtual Centre of Excellence in Mobile and Personal Communications (Mobile VCE) moves into its second core research programme it has been decided to set up a fourth generation (4G) Visions Group aimed at harmonising the research work across the work areas and amongst the numerous researchers working on the programme. This paper outlines the initial work of the group and provides a start to what will become an evolving vision of 4G. A short history of previous generations of mobile communications systems and a discussion of the limitations of third generation (3G) systems are followed by a vision of 4G for 2010 based around five elements: fully converged services, ubiquitous mobile access, diverse user devices, autonomous networks and software dependency. This vision is developed in more detail from a technology viewpoint into the key areas of networks and services, software systems and wireless access. It has been based upon a set of user scenarios that have been developed elsewhere in the Mobile VCE but which are summarised in the paper.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126064445","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}
S. Saunders, K. Kelly, S.M.R. Jones, M. Dell'Anna, T. Harrold
Working within the Mobile VCE a team formed from several leading UK university departments, in association with industry representatives, has been addressing challenges of the modern wideband radio environment. A focus of the team's work has been to generate new mobile radio data-centric architectures capable of delivering a high quality of service and a high network capacity while coping with the little-known outdoor-to-indoor interface. In order to address this latter interface, unique propagation data have been captured and new channel models have been proposed to describe their behaviour. Finally, performance predictions have been conducted using a new simulation platform.
{"title":"The indoor-outdoor radio environment","authors":"S. Saunders, K. Kelly, S.M.R. Jones, M. Dell'Anna, T. Harrold","doi":"10.1049/ECEJ:20000603","DOIUrl":"https://doi.org/10.1049/ECEJ:20000603","url":null,"abstract":"Working within the Mobile VCE a team formed from several leading UK university departments, in association with industry representatives, has been addressing challenges of the modern wideband radio environment. A focus of the team's work has been to generate new mobile radio data-centric architectures capable of delivering a high quality of service and a high network capacity while coping with the little-known outdoor-to-indoor interface. In order to address this latter interface, unique propagation data have been captured and new channel models have been proposed to describe their behaviour. Finally, performance predictions have been conducted using a new simulation platform.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116815128","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}
This paper identifies and reviews those aspects of new materials and device technological advances that have pushed HBT circuits towards a 100 GHz operating frequency. The operating principles of the HBT are initially discussed in relation to their differences from homojunction bipolar transistors. The advantages and disadvantages of the various materials systems available to HBTs, how the particular material properties relate to the device performance and a brief outline of growth technologies are then presented. Those device parameters contributing to the frequency performance figures-of-merit are identified and the resulting design approaches discussed. Current device fabrication technology is then reviewed, with the latest results and the most important design aspects for high-frequency operation identified. This is then followed by examples of achievements in both digital and analogue circuit applications. Finally, an attempt is made to identify those device and materials aspects that are likely to contribute to a further improvement in the frequency performance of HBTs.
{"title":"High-frequency heterojunction bipolar transistor device design and technology","authors":"P. Houston","doi":"10.1049/ECEJ:20000504","DOIUrl":"https://doi.org/10.1049/ECEJ:20000504","url":null,"abstract":"This paper identifies and reviews those aspects of new materials and device technological advances that have pushed HBT circuits towards a 100 GHz operating frequency. The operating principles of the HBT are initially discussed in relation to their differences from homojunction bipolar transistors. The advantages and disadvantages of the various materials systems available to HBTs, how the particular material properties relate to the device performance and a brief outline of growth technologies are then presented. Those device parameters contributing to the frequency performance figures-of-merit are identified and the resulting design approaches discussed. Current device fabrication technology is then reviewed, with the latest results and the most important design aspects for high-frequency operation identified. This is then followed by examples of achievements in both digital and analogue circuit applications. Finally, an attempt is made to identify those device and materials aspects that are likely to contribute to a further improvement in the frequency performance of HBTs.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133692559","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}
This paper aims to help those with some experience of vision to obtain a more indepth understanding of the problems of low-level vision. As it is not possible to cover everything in a paper of this length, a carefully chosen series of cases and case studies is presented. Relevant principles are brought out and a set of important ground rules is presented by way of summary.
{"title":"Low-level vision requirements","authors":"E. R. Davies","doi":"10.1049/ECEJ:20000502","DOIUrl":"https://doi.org/10.1049/ECEJ:20000502","url":null,"abstract":"This paper aims to help those with some experience of vision to obtain a more indepth understanding of the problems of low-level vision. As it is not possible to cover everything in a paper of this length, a carefully chosen series of cases and case studies is presented. Relevant principles are brought out and a set of important ground rules is presented by way of summary.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123533767","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}
Colour imaging is now commonplace in industrial and scientific applications and in domestic and professional photography. The digital processing of colour images for analysis, enhancement, or colour measurement is also common. This paper introduces the nature of colour, its electronic representation, and the concepts of luminance and chrominance. The complexities of precision image acquisition and display are outlined and the paper then discusses the fundamental processing concepts of component-wise and vector filtering and shows that there are still new developments to be expected in the digital processing of colour images.
{"title":"Colour in image processing","authors":"S. Sangwine","doi":"10.1049/ECEJ:20000503","DOIUrl":"https://doi.org/10.1049/ECEJ:20000503","url":null,"abstract":"Colour imaging is now commonplace in industrial and scientific applications and in domestic and professional photography. The digital processing of colour images for analysis, enhancement, or colour measurement is also common. This paper introduces the nature of colour, its electronic representation, and the concepts of luminance and chrominance. The complexities of precision image acquisition and display are outlined and the paper then discusses the fundamental processing concepts of component-wise and vector filtering and shows that there are still new developments to be expected in the digital processing of colour images.","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129079968","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}
{"title":"Image processing and its applications","authors":"E. R. Davies","doi":"10.1049/ecej:20000501","DOIUrl":"https://doi.org/10.1049/ecej:20000501","url":null,"abstract":"","PeriodicalId":127784,"journal":{"name":"Electronics & Communication Engineering Journal","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121852376","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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