Academic literature on the topic 'Wireless LANs Standards Australia'

This paper proposes the several contention window adjustment schemes in backoff process as well-known backoff algorithm (BA) for improving the performance of wireless local area network (WLAN). In addition, this research introduces a new unsaturated discrete Markov chain model in fixed backoff stages and fixed contention window sizes technique (FBFC). The proposed contention window adjustment schemes are designed by applying the moment generating function concept in random variable and process theorem. Unsaturated throughput parameters are used to compare the performance of all contention window size adjustment techniques based on IEEE802.11b WLAN standards. The comparison results show that Bernoulli and Double adjustment schemes are good contention window size adjustments at light traffic load, and the Even contention window size adjustment operates well at high traffic load condition.

With the density of wireless networks increasing rapidly, one of the major goals in next-generation wireless LANs (Local Area Networks) is to support a very dense network with a large number of closely deployed APs (Access Points) and crowded users. However, the CSMA (Carrier-Sense Multiple Access)-based medium access control of current wireless network systems suffers from significantly degraded performance when the network becomes dense. Recent WLAN (Wireless Local Area Networks) standards include measures for increasing spatial reuse such as BSS (Basic Service Set) coloring, but the schemes based on BSS coloring such as OBSS/PD (Overlapping BSS/Preamble Detection) have limitations in improving spatial reuse. In this paper, we propose a spatial reuse method for uplink which can utilize BSS color and proximity information to improve the efficiency of carrier sensing and thus spatial reuse. Specifically, through the BSS color and the proximity information, a node receiving a preamble can figure out how far the receiver of the ongoing traffic is located. This information is used to determine whether the node should aggressively start transmitting or defer its transmission to protect the ongoing transmission. Simulation results show that the proposed method outperforms existing methods in terms of throughput and fairness.

With the mobility and ease of connection, wireless sensor networks have played a significant role in communication over the last few years, making them a significant data carrier across networks. Additional security, lower latency, and dependable standards and communication capability are required for future-generation systems such as millimeter-wave LANs, broadband wireless access schemes, and 5G/6G networks, among other things. Effectual congestion control is regarded as of the essential aspects of 5G/6G technology. It permits operators to run many network illustrations on a single organization while maintaining higher service quality. A sophisticated decision-making system for arriving network traffic is necessary to confirm load balancing, limit network slice letdown, and supply alternative slices in slice letdown or congestion. Because of the massive amount of data being generated, artificial intelligence (AI) and machine learning (ML) play a vital role in reconfiguring and improving a 5G/6G wireless network. In this research work, a hybrid deep learning method is being applied to forecast optimal congestion improvement in the wireless sensors of 5G/6G IoT networks. This proposed model is applied to a training dataset to govern the congestion in a 5G/6G network. The proposed approach provided promising results, with 0.933 accuracy, and 0.067 miss rate.

Mapping and Recognition of Radio Frequency Clutter in Various Environments in AustraliaRadio frequency spectrum mapping allows determining the radio frequency signatures prevalent within an environment. We address the primary frequency bands used for cellular, wireless Local Area Network (LAN), Universal Mobile Telecommunications System (UMTS) and Ultra-wideband (UWB) communications. The purpose of the experiment presented in this paper is to map the detected radio frequencies within an environment and display the collated data on a graphical user interface. A program identifies the presence of the aforementioned radio frequency signatures and recognizes signal levels which exceed the exposure standards enforced by the Australian Communication and Media Authority. The results assist in the understanding of the ramifications of long-term exposure to radio frequency radiation associated with the continued proliferation of wireless devices.

To usefully describe sensor deployments on animals is a major challenge for advocates of data standards. Bio-logging studies also need to be documented in a standard manner to facilitate discovery and determine relevance? For systems aggregating biodiversity occurrence records, the use of the Darwin Core standard (Wieczorek et al. 2012) to express species occurrences is near ubiquitous. Bio-logging studies are universally multiple instances of species occurrences that output high quality spatial and temporal data recorded by specialists. There are a lot of benefits to summarising these studies by means of a single, flat file record. Simple Darwin Core offers the ability to do this by representing the multiple occurrences as a date range in dwc:eventDate and a footprint polygon using dwc:footprintWKT for the area covered by the track. By also uniformly describing the species, the dwc:basisOfRecord as Machine Observation, and a controlled vocabulary to describe the type of bio-logging data, systems could offer an effective means of querying tracking data. It’s important to look to other data standards initiatives relevant to bio-logging to ensure common usage of Darwin Core terms. The Atlas of Living Australia is using an implementation of Simple Darwin Core to represent data from the bio-logging platform ZoaTrack as occurrence data to make it discoverable via location or species-based searches. Other initiatives, for example Swedish LifeWatch follow a similar approach to represent data from the Wireless Remote Animal Monitoring (WRAM) Scandinavian bio-logging infrastructure. With endorsement from the community, the implementation could be useful as a type of metadata catalogue record, opening it for usage in application programmer interface (API) development and thus enabling machine interoperability between systems and users. In short, bio-logging systems and practitioners would be able to easily discover relevant studies by searching by location and/or species.

The convergence of suburban homes and digital media and communications technologies is set to undergo a major shift as next-generation broadband infrastructures are installed. Embodied in the Australian Government’s National Broadband Network (NBN) and the delivery of fibre-optic cable to the front door of every suburban home, is an anticipated future of digital living that will transform the landscape and experience of suburban life. Drawing from our research, and from industry, policy and media documents, we map some scenarios of the NBN rollout in its early stages to show that this imaginary of seamless broadband in the suburbs and the transformation of digital homes it anticipates is challenged by local cultural and material geographies, which we describe as a politics of spectrum. The universal implementation of policy across Australia faces a considerable challenge in dealing with Australia’s physical environment. Geography has always had a major impact on communications technologies and services in Australia, and a major impetus of building a national broadband network has been to overcome the “tyranny of distance” experienced by people in many remote, regional and suburban areas. In 2009 the minister for Broadband, Communications and the Digital Economy (DBCDE), Stephen Conroy, announced that with the Government’s NBN policy “every person and business in Australia, no-matter where they are located, will have access to affordable, fast broadband at their fingertips” (Conroy). This ambition to digitally connect and include imagines the NBN as the solution to the current patchwork of connectivity and Internet speeds experienced across the country (ACCAN). Overcoming geographic difference and providing fast, universal and equitable digital access is to be realised through an open access broadband network built by the newly established NBN Co. Limited, jointly owned by the Government and the private sector at a cost estimated at $43 billion over eight years. In the main this network will depend upon fibre-optics reaching over 90% of the population, and achieving download speeds of up to 100 Mbit/s. The remaining population, mostly living in rural and remote areas, will receive wireless and satellite connections providing speeds of 12 Mbit/s (Conroy). Differential implementation in relation to comparisons of urban and remote populations is thus already embedded in the policy, yet distance is not the only characteristic of Australia’s material geographies that will shape the physical implementation of the NBN and create a varied spectrum of the experience of broadband. Instead, in this article we examine the uneven experience of broadband we may see occurring within suburban regions; places in which enhanced and collective participation in the digital economy relies upon the provision of faster transmission speeds and the delivery of fibre “the last mile” to each and every premise. The crucial platform for delivering broadband to the ’burbs is the digital home. The notion of the connected or smart or digital home has been around in different guises for a number of decades (e.g. Edwards et al.), and received wide press coverage in the 1990s (e.g. Howard). It has since been concretised in the wake of the NBN as telecommunications companies struggle to envision a viable “next step” in broadband consumption. Novel to the NBN imaginary of the digital home is a shift from thinking about the digital home in terms of consumer electronics and interoperable or automatic devices, based on shared standards or home networking, to addressing the home as a platform embedded within the economy. The digital home is imagined as an integral part of a network of digital living with seamless transitions between home, office, supermarket, school, and hospital. In the imaginary of the NBN, the digital home becomes a vital connection in the growing digital economy. Communications Patchwork, NBN Roll-Out and Infrastructure Despite this imagined future of seamless connectivity and universal integration of suburban life with the digital economy, there has been an uneven take-up of fibre connections. We argue that this suggests that the particularities of place and the materialities of geography are relevant for understanding the differential uptake of the NBN across the test sites. Furthermore, we maintain that these issues provide a useful model for understanding the ongoing process and challenges that the rollout of the NBN will face in providing even access to the imagined future of the digital home to all Australians. As of June 2011 an average of 70 per cent of homes in the five first release NBN sites have agreed to have the fibre cables installed (Grubb). However, there is a dramatic variation between these sites: in Armidale, NSW, and Willunga, SA, the percentage of properties consenting to fibre connections on their house is between 80-90 per cent; whereas in Brunswick, Victoria, and Midway Point, Tasmania, the take-up rate is closer to 50 per cent (Grubb). We suggest that these variations are created by a differential geography of connectivity that will continue to grow in significance as the NBN is rolled out to more locations around Australia. These can be seen to emerge as a consequence of localised conditions relating to, for example, installation policy, a focus on cost, and installation logistics. Another significant factor, unable to be addressed within the scope of this paper, is the integration of the NBN with each household’s domestic network of hardware devices, internal connections, software, and of course skill and interest. Installation Policy The opt-in policy of the NBN Co requires that owners of properties agree to become connected—as opposed to being automatically connected unless they opt-out. This makes getting connected a far simpler task for owner-occupiers over renters, because the latter group were required to triangulate with their landlords in order to get connected. This was considered to be a factor that impacted on the relatively low uptake of the NBN in Brunswick and Midway Point, and is reflected in media reports (Grubb) and our research: There was a bit of a problem with Midway Point, because I think it is about fifty percent of the houses here are rentals, and you needed signatures from the owners for the box to be put onto the building (anon. “Broadband in the Home” project). …a lot of people rent here, so unless their landlord filled it in they wouldn’t know (anon. “Broadband in the Home” project). The issue is exacerbated by the concentration of rental properties in particular suburbs and complicated rental arrangements mediated through agents, which prevent effective communication between the occupiers and owners of a property. In order to increase take-up in Tasmania, former State Premier, David Bartlett, successfully introduced legislation to the Tasmanian state legislature in late 2010 to make the NBN opt-out rather than opt-in. This reversed the onus of responsibility and meant that in Tasmania all houses and businesses would be automatically connected unless otherwise requested, and in order to effect this simple policy change, the government had to change trespass laws. However, other state legislatures are hesitant to follow the opt-out model (Grubb). Differentials in owner-occupied and rental properties within urban centres, combined with opt-in policies, are likely to see a continuation of the connectivity patchwork that that has thus far characterised Australian communications experience. A Focus on Cost Despite a great deal of public debate about the NBN, there is relatively little discussion of its proposed benefits. The fibre-to-the-home structure of the NBN is also subject to fierce partisan political debate between Australia’s major political parties, particularly around the form and cost of its implementation. As a consequence of this preoccupation with cost, many Australian consumers cannot see a “value proposition” in connecting, and are not convinced of the benefits of the NBN (Brown). The NBN is often reduced to an increased minimum download rate, and to increased ISP fees associated with high speeds, rather than a broader discussion of how the infrastructure can impact on commerce, education, entertainment, healthcare, and work (Barr). Moreover, this lack of balance in the discussion of costs and benefits extends in some instances to outright misunderstandings about the difference between infrastructure and service provision: …my neighbour across the road did not understand what that letter meant, and she would have to have been one of dozens if not hundreds in the exactly the same situation, who thought they were signing up for a broadband plan rather than just access to the infrastructure (anon. “Broadband in the Home” project) Lastly, the advent of the NBN in the first release areas does not override the costs of existing contracts for broadband delivered over the current copper network. Australians are often required to sign long-term contracts that prevent them from switching immediately to the new HSB infrastructure. Installation Logistics Local variations in fibre installation were evident prior to the rollout of the NBN, when the increased provision of HSB was already being used as a marketing device for greenfield (newly developed) estates in suburban Australia. In the wake of the NBN rollouts, some housing developers have begun to lay “NBN-ready” optic fibre in greenfield estates. While this is a positive development for those who a purchasing a newly-developed property, those that invest in brownfield “re-developments,” may have to pay over twice the amount for the installation of the NBN (Neales). These varying local conditions of installation are reflected in the contractual arrangements for installing the fibre, the installers’ policies for installation, and the processes of installation (Darling): They’re gonna have to do 4000 houses a day … and it was a solid six months to get about 800 houses hooked up here. So, logistically I just can’t see it happening. (anon. “Broadband in the Home” project) Finally, for those who do not take-up the free initial installation offer, for whatever reason, there will be costs to have contractors return and connect the fibre (Grubb; Neales). Spectrum Politics, Fibre in the Neighbourhood The promise that the NBN will provide fast, universal and equitable digital access realised through a fibre-optic network is challenged by the experience of first release sites such as Midway Point. As evident above, and due to a number of factors, there is a likelihood in supposedly NBN-connected places of varied connectivity in which service will range from dial-up to DSL and ADSL to fibre and wireless, all within a single location. The varied connectivity in the early NBN rollout stages suggests that the patchwork of Internet connections commonly experienced in Australian suburbs will continue rather than disappear. This varied patchwork can be understood as a politics of spectrum. Rod Tucker (13-14) emphasises that the crucial element of spectrum is its bandwidth, or information carrying capacity. In light of this the politics of spectrum reframes the key issue of access to participation in the digital economy to examine stakes of the varying quality of connection (particularly download speeds), through the available medium (wireless, copper, coaxial cable, optical fibre), connection (modem, antenna, gateway) and service type (DSL, WiFi, Satellite, FTTP). This technical emphasis follows in the wake of debates about digital inclusion (e.g., Warschauer) to re-introduce the importance of connection quality—embedded in older “digital divide” discourse—into approaches that look beyond technical infrastructure to the social conditions of their use. This is a shift that takes account of the various and intertwined socio-technical factors influencing the quality of access and use. This spectrum politics also has important implications for the Universal Service Obligation (USO). Telstra (the former Telecom) continues to have the responsibility to provide every premise in Australia with a standard telephone service, that is at least a single copper line—or equivalent service—connection. However, the creation of the NBN Co. relieves Telstra of this obligation in the areas which have coverage from the fibre network. This agreement means that Telstra will gradually shut down its ageing copper network, following the pattern of the NBN rollout and transfer customers to the newly developed broadband fibre network (Hepworth and Wilson). Consequently, every individual phone service in those areas will be required to move onto the NBN to maintain the USO. This means that premises not connected to the NBN because the owners of the property opted out—by default or by choice—are faced with an uncertain future vis-à-vis the meaning and provision of the USO because they will not have access to either copper or fibre networks. At this extreme of spectrum politics, the current policy setting may result in households that have no possibility of a broadband connection. This potential problem can be resolved by a retro-rollout, in which NBN fibre connection is installed at some point in the future to every premises regardless of whether they originally agreed or not. Currently, however, the cost of a retrospective connection is expected to be borne by the consumer: “those who decline to allow NBN Co on to their property will need to pay up to $300 to connect to the NBN at a later date” (Grubb) Smaller, often brownfield development estates also face particular difficulties in the current long-term switch of responsibilities from Telstra to the NBN Co. This is because Telstra is reluctant to install new copper networks knowing that they will soon become obsolete. Instead, “in housing estates of fewer than 100 houses, Telstra is often providing residents with wireless phones that are unable to connect to the Internet” (Thompson). Thus a limbo is created, where new residents will not have access to either copper or fibre fixed line connections. Rather, they will have to use whatever wireless Internet is available in the area. Particularly concerning is that the period of the rollout is projected to last for eight years. As a result: “Thousands of Australians—many of them in regional areas—can expect years of worse, rather than better, Internet services as the National Broadband Network rolls out across the country” (Thompson). And, given different take-up rates and costs of retro-fitting, this situation could continue for many people and for many years after the initial rollout is completed. Implications of Spectrum Politics for the Digital Home What does this uncertain and patchwork future of connectivity imply for digital living and the next-generation broadband suburb? In contrast to the imagined post-NBN geography of the seamless digital home, local material and cultural factors will still create varied levels of service. This predicament challenges the ideals of organisations such as the Digital Living Network, an industry body comprised of corporate members, “based on principles of open standards and home networking interoperability [which] will unleash a rich digital media environment of interconnected devices that enable us all to experience our favorite content and services wherever and whenever we want” (Vohringer). Such a vision of convergence takes a domestic approach to the “Internet of things” by imagining a user-friendly network of personal computing, consumer electronics, mobile technologies, utilities, and other domestic technologies. The NBN anticipates a digital home that is integrated into the digital economy as a node of production and consumption. But this future is challenged by the patchwork of connectivity. Bruno Latour famously remarked that even the most extensive and powerful networks are local at every point. Although he was speaking of actor-networks, not broadband networks, analysis of the Australian experience of high-speed broadband would do well to look beyond its national characteristics to include its local characteristics, and the constellations between them. It is at the local level, importantly, at the level of the household and suburb, that the NBN will be experienced in daily life. As we have argued here, we have reason to expect that this experience will be as disparate as the network is distributed, and we have reason to believe that local cultural and material factors such as installation policies, discussions around costs and benefits, the household’s own internal digital infrastructure, and installation logistics at the level of the house and the neighbourhood, will continue to shape a patchworked geography of media and communications experiences for digital homes. References Australian Communications Consumer Action Network (ACCAN). National Broadband Network: A Guide for Consumers. Internet Society of Australia (ISOC-AU) and ACCAN, 2011. Barr, Trevor. “A Broadband Services Typology.” The Australian Economic Review 43.2 (2010): 187-193. Brown, Damien. “NBN Now 10 Times Faster.” The Mercury 13 Aug. 2010. ‹http://www.themercury.com.au/article/2010/08/13/165435_todays-news.html›. Conroy, Stephen (Minister for Broadband, Communications and the Digital Economy). “New National Broadband Network”. Canberra: Australian Government, 7 April 2009. ‹http://www.minister.dbcde.gov.au/media/media_releases/2009/022›. Darling, Peter. “Building the National Broadband Network.” Telecommunications Journal of Australia 60.3 (2010): 42.1-12. Department of Broadband, Communications and the Digital Economy (DBCDE). “Impacts of Teleworking under the NBN.” Report prepared by Access Economics. Canberra, 2010. Edwards, Keith, Rebecca Grinter, Ratul Mahajan, and David Wetherall. “Advancing the State of Home Networking.” Communications of the ACM 54.6 (2010): 62-71. Grubb, Ben. “Connect to NBN Now or Pay Up to $300 for Phone Line.” The Sydney Morning Herald 15 Oct. 2010. ‹http://www.smh.com.au/technology/technology-news/connect-to-nbn-now-or-pay-up-to-300-for-phone-line-20101015-16ms3.html›. Hepworth, Annabel, and Lauren Wilson. “Customers May Be Forced on to NBN to Keep Phones.” The Australian 12 Oct. 2010. ‹http://www.theaustralian.com.au/national-affairs/customers-may-be-forced-on-to-nbn-to-keep-phones/story-fn59niix-1225937394605›. Howard, Sandy. “How Your Home Will Operate.” Business Review Weekly 25 April 1994: 100. Intel Corporation. “Intel and the Digital Home.” ‹http://www.intel.com/standards/case/case_dh.htm›. Latour, Bruno. Reassembling the Social: An Introduction to Actor-Network-Theory. Oxford: Oxford University Press, 2005. Neales, Sue. “Bartlett Looks at ‘Opt-out’ NBN.” The Mercury 28 July 2010. ‹http://www.themercury.com.au/article/2010/07/28/161721_tasmania-news.html›. Spigel, Lynn. “Media Homes: Then and Now.” International Journal of Cultural Studies 4.4 (2001): 385–411. Thompson, Geoff. “Thousands to Be Stuck in NBN ‘Limbo’.” ABC Online 26 April 2011. ‹http://www.abc.net.au/news/stories/2011/04/26/3200127.htm›. Tietze, S., and G. Musson. “Recasting the Home—Work Relationship: A Case of Mutual Adjustment?” Organization Studies 26.9 (2005): 1331–1352. Trulove, James Grayson (ed.). The Smart House. New York: HDI, 2003. Tucker, Rodney S. “Broadband Facts, Fiction and Urban Myths.” Telecommunications Journal of Australia 60.3 (2010): 43.1 to 43.15. Vohringer, Cesar. CTO of Philips Consumer Electronics (from June 2003 DLNA press release) cited on the Intel Corporation website. ‹http://www.intel.com/standards/case/case_dh.htm›. Warschauer, Mark. Technology and Social Inclusion: Rethinking the Digital Divide. Cambridge: MIT Press, 2003. Wilken, Rowan, Michael Arnold, and Bjorn Nansen. “Broadband in the Home Pilot Study: Suburban Hobart.” Telecommunications Journal of Australia 61.1 (2011): 5.1-16.

Connecting I’ve moved house on the weekend, closer to the centre of an Australian capital city. I had recently signed up for broadband, with a major Australian Internet company (my first contact, cf. Turner). Now I am the proud owner of a larger modem than I have ever owned: a white cable modem. I gaze out into our new street: two thick black cables cosseted in silver wire. I am relieved. My new home is located in one of those streets, double-cabled by Telstra and Optus in the data-rush of the mid-1990s. Otherwise, I’d be moth-balling the cable modem, and the thrill of my data percolating down coaxial cable. And it would be off to the computer supermarket to buy an ASDL modem, then to pick a provider, to squeeze some twenty-first century connectivity out of old copper (the phone network our grandparents and great-grandparents built). If I still lived in the country, or the outskirts of the city, or anywhere else more than four kilometres from the phone exchange, and somewhere that cable pay TV will never reach, it would be a dish for me — satellite. Our digital lives are premised upon infrastructure, the networks through which we shape what we do, fashion the meanings of our customs and practices, and exchange signs with others. Infrastructure is not simply the material or the technical (Lamberton), but it is the dense, fibrous knotting together of social visions, cultural resources, individual desires, and connections. No more can one easily discern between ‘society’ and ‘technology’, ‘carriage’ and ‘content’, ‘base’ and ‘superstructure’, or ‘infrastructure’ and ‘applications’ (or ‘services’ or ‘content’). To understand telecommunications in action, or the vectors of fibre, we need to consider the long and heterogeneous list of links among different human and non-human actors — the long networks, to take Bruno Latour’s evocative concept, that confect our broadband networks (Latour). The co-ordinates of our infrastructure still build on a century-long history of telecommunications networks, on the nineteenth-century centrality of telegraphy preceding this, and on the histories of the public and private so inscribed. Yet we are in the midst of a long, slow dismantling of the posts-telegraph-telephone (PTT) model of the monopoly carrier for each nation that dominated the twentieth century, with its deep colonial foundations. Instead our New World Information and Communication Order is not the decolonising UNESCO vision of the late 1970s and early 1980s (MacBride, Maitland). Rather it is the neoliberal, free trade, market access model, its symbol the 1984 US judicial decision to require the break-up of AT&T and the UK legislation in the same year that underpinned the Thatcherite twin move to privatize British Telecom and introduce telecommunications competition. Between 1984 and 1999, 110 telecommunications companies were privatized, and the ‘acquisition of privatized PTOs [public telecommunications operators] by European and American operators does follow colonial lines’ (Winseck 396; see also Mody, Bauer & Straubhaar). The competitive market has now been uneasily installed as the paradigm for convergent communications networks, not least with the World Trade Organisation’s 1994 General Agreement on Trade in Services and Annex on Telecommunications. As the citizen is recast as consumer and customer (Goggin, ‘Citizens and Beyond’), we rethink our cultural and political axioms as well as the axes that orient our understandings in this area. Information might travel close to the speed of light, and we might fantasise about optical fibre to the home (or pillow), but our terrain, our band where the struggle lies today, is narrower than we wish. Begging for broadband, it seems, is a long way from warchalking for WiFi. Policy Circuits The dreary everyday business of getting connected plugs the individual netizen into a tangled mess of policy circuits, as much as tricky network negotiations. Broadband in mid-2003 in Australia is a curious chimera, welded together from a patchwork of technologies, old and newer communications industries, emerging economies and patterns of use. Broadband conjures up grander visions, however, of communication and cultural cornucopia. Broadband is high-speed, high-bandwidth, ‘always-on’, networked communications. People can send and receive video, engage in multimedia exchanges of all sorts, make the most of online education, realise the vision of home-based work and trading, have access to telemedicine, and entertainment. Broadband really entered the lexicon with the mass takeup of the Internet in the early to mid-1990s, and with the debates about something called the ‘information superhighway’. The rise of the Internet, the deregulation of telecommunications, and the involuted convergence of communications and media technologies saw broadband positioned at the centre of policy debates nearly a decade ago. In 1993-1994, Australia had its Broadband Services Expert Group (BSEG), established by the then Labor government. The BSEG was charged with inquiring into ‘issues relating to the delivery of broadband services to homes, schools and businesses’. Stung by criticisms of elite composition (a narrow membership, with only one woman among its twelve members, and no consumer or citizen group representation), the BSEG was prompted into wider public discussion and consultation (Goggin & Newell). The then Bureau of Transport and Communications Economics (BTCE), since transmogrified into the Communications Research Unit of the Department of Communications, Information Technology and the Arts (DCITA), conducted its large-scale Communications Futures Project (BTCE and Luck). The BSEG Final report posed the question starkly: As a society we have choices to make. If we ignore the opportunities we run the risk of being left behind as other countries introduce new services and make themselves more competitive: we will become consumers of other countries’ content, culture and technologies rather than our own. Or we could adopt new technologies at any cost…This report puts forward a different approach, one based on developing a new, user-oriented strategy for communications. The emphasis will be on communication among people... (BSEG v) The BSEG proposed a ‘National Strategy for New Communications Networks’ based on three aspects: education and community access, industry development, and the role of government (BSEG x). Ironically, while the nation, or at least its policy elites, pondered the weighty question of broadband, Australia’s two largest telcos were doing it. The commercial decision of Telstra/Foxtel and Optus Vision, and their various television partners, was to nail their colours (black) to the mast, or rather telegraph pole, and to lay cable in the major capital cities. In fact, they duplicated the infrastructure in cities such as Sydney and Melbourne, then deciding it would not be profitable to cable up even regional centres, let alone small country towns or settlements. As Terry Flew and Christina Spurgeon observe: This wasteful duplication contrasted with many other parts of the country that would never have access to this infrastructure, or to the social and economic benefits that it was perceived to deliver. (Flew & Spurgeon 72) The implications of this decision for Australia’s telecommunications and television were profound, but there was little, if any, public input into this. Then Minister Michael Lee was very proud of his anti-siphoning list of programs, such as national sporting events, that would remain on free-to-air television rather than screen on pay, but was unwilling, or unable, to develop policy on broadband and pay TV cable infrastructure (on the ironies of Australia’s television history, see Given’s masterly account). During this period also, it may be remembered, Australia’s Internet was being passed into private hands, with the tendering out of AARNET (see Spurgeon for discussion). No such national strategy on broadband really emerged in the intervening years, nor has the market provided integrated, accessible broadband services. In 1997, landmark telecommunications legislation was enacted that provided a comprehensive framework for competition in telecommunications, as well as consolidating and extending consumer protection, universal service, customer service standards, and other reforms (CLC). Carrier and reseller competition had commenced in 1991, and the 1997 legislation gave it further impetus. Effective competition is now well established in long distance telephone markets, and in mobiles. Rivalrous competition exists in the market for local-call services, though viable alternatives to Telstra’s dominance are still few (Fels). Broadband too is an area where there is symbolic rivalry rather than effective competition. This is most visible in advertised ADSL offerings in large cities, yet most of the infrastructure for these services is comprised by Telstra’s copper, fixed-line network. Facilities-based duopoly competition exists principally where Telstra/Foxtel and Optus cable networks have been laid, though there are quite a number of ventures underway by regional telcos, power companies, and, most substantial perhaps, the ACT government’s TransACT broadband network. Policymakers and industry have been greatly concerned about what they see as slow takeup of broadband, compared to other countries, and by barriers to broadband competition and access to ‘bottleneck’ facilities (such as Telstra or Optus’s networks) by potential competitors. The government has alternated between trying to talk up broadband benefits and rates of take up and recognising the real difficulties Australia faces as a large country with a relative small and dispersed population. In March 2003, Minister Alston directed the ACCC to implement new monitoring and reporting arrangements on competition in the broadband industry. A key site for discussion of these matters has been the competition policy institution, the Australian Competition and Consumer Commission, and its various inquiries, reports, and considerations (consult ACCC’s telecommunications homepage at http://www.accc.gov.au/telco/fs-telecom.htm). Another key site has been the Productivity Commission (http://www.pc.gov.au), while a third is the National Office on the Information Economy (NOIE - http://www.noie.gov.au/projects/access/access/broadband1.htm). Others have questioned whether even the most perfectly competitive market in broadband will actually provide access to citizens and consumers. A great deal of work on this issue has been undertaken by DCITA, NOIE, the regulators, and industry bodies, not to mention consumer and public interest groups. Since 1997, there have been a number of governmental inquiries undertaken or in progress concerning the takeup of broadband and networked new media (for example, a House of Representatives Wireless Broadband Inquiry), as well as important inquiries into the still most strategically important of Australia’s companies in this area, Telstra. Much of this effort on an ersatz broadband policy has been piecemeal and fragmented. There are fundamental difficulties with the large size of the Australian continent and its harsh terrain, the small size of the Australian market, the number of providers, and the dominant position effectively still held by Telstra, as well as Singtel Optus (Optus’s previous overseas investors included Cable & Wireless and Bell South), and the larger telecommunications and Internet companies (such as Ozemail). Many consumers living in metropolitan Australia still face real difficulties in realising the slogan ‘bandwidth for all’, but the situation in parts of rural Australia is far worse. Satellite ‘broadband’ solutions are available, through Telstra Countrywide or other providers, but these offer limited two-way interactivity. Data can be received at reasonable speeds (though at far lower data rates than how ‘broadband’ used to be defined), but can only be sent at far slower rates (Goggin, Rural Communities Online). The cultural implications of these digital constraints may well be considerable. Computer gamers, for instance, are frustrated by slow return paths. In this light, the final report of the January 2003 Broadband Advisory Group (BAG) is very timely. The BAG report opens with a broadband rhapsody: Broadband communications technologies can deliver substantial economic and social benefits to Australia…As well as producing productivity gains in traditional and new industries, advanced connectivity can enrich community life, particularly in rural and regional areas. It provides the basis for integration of remote communities into national economic, cultural and social life. (BAG 1, 7) Its prescriptions include: Australia will be a world leader in the availability and effective use of broadband...and to capture the economic and social benefits of broadband connectivity...Broadband should be available to all Australians at fair and reasonable prices…Market arrangements should be pro-competitive and encourage investment...The Government should adopt a National Broadband Strategy (BAG 1) And, like its predecessor nine years earlier, the BAG report does make reference to a national broadband strategy aiming to maximise “choice in work and recreation activities available to all Australians independent of location, background, age or interests” (17). However, the idea of a national broadband strategy is not something the BAG really comes to grips with. The final report is keen on encouraging broadband adoption, but not explicit on how barriers to broadband can be addressed. Perhaps this is not surprising given that the membership of the BAG, dominated by representatives of large corporations and senior bureaucrats was even less representative than its BSEG predecessor. Some months after the BAG report, the Federal government did declare a broadband strategy. It did so, intriguingly enough, under the rubric of its response to the Regional Telecommunications Inquiry report (Estens), the second inquiry responsible for reassuring citizens nervous about the full-privatisation of Telstra (the first inquiry being Besley). The government’s grand $142.8 million National Broadband Strategy focusses on the ‘broadband needs of regional Australians, in partnership with all levels of government’ (Alston, ‘National Broadband Strategy’). Among other things, the government claims that the Strategy will result in “improved outcomes in terms of services and prices for regional broadband access; [and] the development of national broadband infrastructure assets.” (Alston, ‘National Broadband Strategy’) At the same time, the government announced an overall response to the Estens Inquiry, with specific safeguards for Telstra’s role in regional communications — a preliminary to the full Telstra sale (Alston, ‘Future Proofing’). Less publicised was the government’s further initiative in indigenous telecommunications, complementing its Telecommunications Action Plan for Remote Indigenous Communities (DCITA). Indigenous people, it can be argued, were never really contemplated as citizens with the ken of the universal service policy taken to underpin the twentieth-century government monopoly PTT project. In Australia during the deregulatory and re-regulatory 1990s, there was a great reluctance on the part of Labor and Coalition Federal governments, Telstra and other industry participants, even to research issues of access to and use of telecommunications by indigenous communicators. Telstra, and to a lesser extent Optus (who had purchased AUSSAT as part of their licence arrangements), shrouded the issue of indigenous communications in mystery that policymakers were very reluctant to uncover, let alone systematically address. Then regulator, the Australian Telecommunications Authority (AUSTEL), had raised grave concerns about indigenous telecommunications access in its 1991 Rural Communications inquiry. However, there was no government consideration of, nor research upon, these issues until Alston commissioned a study in 2001 — the basis for the TAPRIC strategy (DCITA). The elision of indigenous telecommunications from mainstream industry and government policy is all the more puzzling, if one considers the extraordinarily varied and significant experiments by indigenous Australians in telecommunications and Internet (not least in the early work of the Tanami community, made famous in media and cultural studies by the writings of anthropologist Eric Michaels). While the government’s mid-2003 moves on a ‘National Broadband Strategy’ attend to some details of the broadband predicament, they fall well short of an integrated framework that grasps the shortcomings of the neoliberal communications model. The funding offered is a token amount. The view from the seat of government is a glance from the rear-view mirror: taking a snapshot of rural communications in the years 2000-2002 and projecting this tableau into a safety-net ‘future proofing’ for the inevitable turning away of a fully-privately-owned Telstra from its previously universal, ‘carrier of last resort’ responsibilities. In this aetiolated, residualist policy gaze, citizens remain constructed as consumers in a very narrow sense in this incremental, quietist version of state securing of market arrangements. What is missing is any more expansive notion of citizens, their varied needs, expectations, uses, and cultural imaginings of ‘always on’ broadband networks. Hybrid Networks “Most people on earth will eventually have access to networks that are all switched, interactive, and broadband”, wrote Frances Cairncross in 1998. ‘Eventually’ is a very appropriate word to describe the parlous state of broadband technology implementation. Broadband is in a slow state of evolution and invention. The story of broadband so far underscores the predicament for Australian access to bandwidth, when we lack any comprehensive, integrated, effective, and fair policy in communications and information technology. We have only begun to experiment with broadband technologies and understand their evolving uses, cultural forms, and the sense in which they rework us as subjects. Our communications networks are not superhighways, to invoke an enduring artefact from an older technology. Nor any longer are they a single ‘public’ switched telecommunications network, like those presided over by the post-telegraph-telephone monopolies of old. Like roads themselves, or the nascent postal system of the sixteenth century, broadband is a patchwork quilt. The ‘fibre’ of our communications networks is hybrid. To be sure, powerful corporations dominate, like the Tassis or Taxis who served as postmasters to the Habsburg emperors (Briggs & Burke 25). Activating broadband today provides a perspective on the path dependency of technology history, and how we can open up new threads of a communications fabric. Our options for transforming our multitudinous networked lives emerge as much from everyday tactics and strategies as they do from grander schemes and unifying policies. We may care to reflect on the waning potential for nation-building technology, in the wake of globalisation. We no longer gather our imagined community around a Community Telephone Plan as it was called in 1960 (Barr, Moyal, and PMG). Yet we do require national and international strategies to get and stay connected (Barr), ideas and funding that concretely address the wider dimensions of access and use. We do need to debate the respective roles of Telstra, the state, community initiatives, and industry competition in fair telecommunications futures. Networks have global reach and require global and national integration. Here vision, co-ordination, and resources are urgently required for our commonweal and moral fibre. To feel the width of the band we desire, we need to plug into and activate the policy circuits. Thanks to Grayson Cooke, Patrick Lichty, Ned Rossiter, John Pace, and an anonymous reviewer for helpful comments. Works Cited Alston, Richard. ‘ “Future Proofing” Regional Communications.’ Department of Communications, Information Technology and the Arts, Canberra, 2003. 17 July 2003 <http://www.dcita.gov.au/Article/0,,0_1-2_3-4_115485,00.php> —. ‘A National Broadband Strategy.’ Department of Communications, Information Technology and the Arts, Canberra, 2003. 17 July 2003 <http://www.dcita.gov.au/Article/0,,0_1-2_3-4_115486,00.php>. Australian Competition and Consumer Commission (ACCC). Broadband Services Report March 2003. Canberra: ACCC, 2003. 17 July 2003 <http://www.accc.gov.au/telco/fs-telecom.htm>. —. Emerging Market Structures in the Communications Sector. Canberra: ACCC, 2003. 15 July 2003 <http://www.accc.gov.au/pubs/publications/utilities/telecommu... ...nications/Emerg_mar_struc.doc>. Barr, Trevor. new media.com: The Changing Face of Australia’s Media and Telecommunications. Sydney: Allen & Unwin, 2000. Besley, Tim (Telecommunications Service Inquiry). Connecting Australia: Telecommunications Service Inquiry. Canberra: Department of Information, Communications and the Arts, 2000. 17 July 2003 <http://www.telinquiry.gov.au/final_report.php>. Briggs, Asa, and Burke, Peter. A Social History of the Internet: From Gutenberg to the Internet. Cambridge: Polity, 2002. Broadband Advisory Group. Australia’s Broadband Connectivity: The Broadband Advisory Group’s Report to Government. Melbourne: National Office on the Information Economy, 2003. 15 July 2003 <http://www.noie.gov.au/publications/NOIE/BAG/report/index.htm>. Broadband Services Expert Group. Networking Australia’s Future: Final Report. Canberra: Australian Government Publishing Service (AGPS), 1994. Bureau of Transport and Communications Economics (BTCE). Communications Futures Final Project. Canberra: AGPS, 1994. Cairncross, Frances. The Death of Distance: How the Communications Revolution Will Change Our Lives. London: Orion Business Books, 1997. Communications Law Centre (CLC). Australian Telecommunications Regulation: The Communications Law Centre Guide. 2nd edition. Sydney: Communications Law Centre, University of NSW, 2001. Department of Communications, Information Technology and the Arts (DCITA). Telecommunications Action Plan for Remote Indigenous Communities: Report on the Strategic Study for Improving Telecommunications in Remote Indigenous Communities. Canberra: DCITA, 2002. Estens, D. Connecting Regional Australia: The Report of the Regional Telecommunications Inquiry. Canberra: DCITA, 2002. <http://www.telinquiry.gov.au/rti-report.php>, accessed 17 July 2003. Fels, Alan. ‘Competition in Telecommunications’, speech to Australian Telecommunications Users Group 19th Annual Conference. 6 March, 2003, Sydney. <http://www.accc.gov.au/speeches/2003/Fels_ATUG_6March03.doc>, accessed 15 July 2003. Flew, Terry, and Spurgeon, Christina. ‘Television After Broadcasting’. In The Australian TV Book. Ed. Graeme Turner and Stuart Cunningham. Allen & Unwin, Sydney. 69-85. 2000. Given, Jock. Turning Off the Television. Sydney: UNSW Press, 2003. Goggin, Gerard. ‘Citizens and Beyond: Universal service in the Twilight of the Nation-State.’ In All Connected?: Universal Service in Telecommunications, ed. Bruce Langtry. Melbourne: University of Melbourne Press, 1998. 49-77 —. Rural Communities Online: Networking to link Consumers to Providers. Melbourne: Telstra Consumer Consultative Council, 2003. Goggin, Gerard, and Newell, Christopher. Digital Disability: The Social Construction of Disability in New Media. Lanham, MD: Rowman & Littlefield, 2003. House of Representatives Standing Committee on Communications, Information Technology and the Arts (HoR). Connecting Australia!: Wireless Broadband. Report of Inquiry into Wireless Broadband Technologies. Canberra: Parliament House, 2002. <http://www.aph.gov.au/house/committee/cita/Wbt/report.htm>, accessed 17 July 2003. Lamberton, Don. ‘A Telecommunications Infrastructure is Not an Information Infrastructure’. Prometheus: Journal of Issues in Technological Change, Innovation, Information Economics, Communication and Science Policy 14 (1996): 31-38. Latour, Bruno. Science in Action: How to Follow Scientists and Engineers Through Society. Cambridge, MA: Harvard University Press, 1987. Luck, David. ‘Revisiting the Future: Assessing the 1994 BTCE communications futures project.’ Media International Australia 96 (2000): 109-119. MacBride, Sean (Chair of International Commission for the Study of Communication Problems). Many Voices, One World: Towards a New More Just and More Efficient World Information and Communication Order. Paris: Kegan Page, London. UNESCO, 1980. Maitland Commission (Independent Commission on Worldwide Telecommunications Development). The Missing Link. Geneva: International Telecommunications Union, 1985. Michaels, Eric. Bad Aboriginal Art: Tradition, Media, and Technological Horizons. Sydney: Allen & Unwin, 1994. Mody, Bella, Bauer, Johannes M., and Straubhaar, Joseph D., eds. Telecommunications Politics: Ownership and Control of the Information Highway in Developing Countries. Mahwah, NJ: Erlbaum, 1995. Moyal, Ann. Clear Across Australia: A History of Telecommunications. Melbourne: Thomas Nelson, 1984. Post-Master General’s Department (PMG). Community Telephone Plan for Australia. Melbourne: PMG, 1960. Productivity Commission (PC). Telecommunications Competition Regulation: Inquiry Report. Report No. 16. Melbourne: Productivity Commission, 2001. <http://www.pc.gov.au/inquiry/telecommunications/finalreport/>, accessed 17 July 2003. Spurgeon, Christina. ‘National Culture, Communications and the Information Economy.’ Media International Australia 87 (1998): 23-34. Turner, Graeme. ‘First Contact: coming to terms with the cable guy.’ UTS Review 3 (1997): 109-21. Winseck, Dwayne. ‘Wired Cities and Transnational Communications: New Forms of Governance for Telecommunications and the New Media’. In The Handbook of New Media: Social Shaping and Consequences of ICTs, ed. Leah A. Lievrouw and Sonia Livingstone. London: Sage, 2002. 393-409. World Trade Organisation. General Agreement on Trade in Services: Annex on Telecommunications. Geneva: World Trade Organisation, 1994. 17 July 2003 <http://www.wto.org/english/tratop_e/serv_e/12-tel_e.htm>. —. Fourth protocol to the General Agreement on Trade in Services. Geneva: World Trade Organisation. 17 July 2003 <http://www.wto.org/english/tratop_e/serv_e/4prote_e.htm>. Links http://www.accc.gov.au/pubs/publications/utilities/telecommunications/Emerg_mar_struc.doc http://www.accc.gov.au/speeches/2003/Fels_ATUG_6March03.doc http://www.accc.gov.au/telco/fs-telecom.htm http://www.aph.gov.au/house/committee/cita/Wbt/report.htm http://www.dcita.gov.au/Article/0,,0_1-2_3-4_115485,00.html http://www.dcita.gov.au/Article/0,,0_1-2_3-4_115486,00.html http://www.noie.gov.au/projects/access/access/broadband1.htm http://www.noie.gov.au/publications/NOIE/BAG/report/index.htm http://www.pc.gov.au http://www.pc.gov.au/inquiry/telecommunications/finalreport/ http://www.telinquiry.gov.au/final_report.html http://www.telinquiry.gov.au/rti-report.html http://www.wto.org/english/tratop_e/serv_e/12-tel_e.htm http://www.wto.org/english/tratop_e/serv_e/4prote_e.htm Citation reference for this article Substitute your date of access for Dn Month Year etc... MLA Style Goggin, Gerard. "Broadband" M/C: A Journal of Media and Culture< http://www.media-culture.org.au/0308/02-featurebroadband.php>. APA Style Goggin, G. (2003, Aug 26). Broadband. M/C: A Journal of Media and Culture, 6,< http://www.media-culture.org.au/0308/02-featurebroadband.php>

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On the modern battlefield, successful and fast communications is a critical issue. So the need for transmitting information in larger amounts through a military high-speed network increases. Thus the military is seeking viable and effective solutions that may fulfill these requirements in an operational environment. This thesis develops a prototype system based on appropriate low-cost software and hardware solutions. This system is able to detect, analyze and process wireless 802.11g signals. The evaluation of the newly designed system proved that it is effective up to distances of about 400 m with a low packet error rate and could be a useful tool for detecting wireless 802.11g networks. After evaluating the system, it was used for capturing wireless signals so that we would determine the effective transmission range and the data throughput of an 802.11g network. We determined that such a wireless network could be used in military operations because it offers high data rates up to 200 m, while it maintains a connection of the wireless clients for distances up to 400 m. In addition, the performance data collected can be used as guidelines for estimating the expected performance in an operational situation and can provide useful information for successful planning.
Lieutenant, Hellenic Navy

Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004.
Thesis advisor(s): Tri T. Ha, Randy L. Borchardt. Includes bibliographical references (p. 89). Also available online.

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This thesis details the critical need for deployable combat simulations for training in today's surge force environment. To truly realize deployment of these simulations on Naval vessels and in remote theaters, simulations for training must be wireless. Wireless standards 802.11/a/b/g are presented in detail to highlight the strengths and weaknesses of each. This thesis then investigates the viability of deploying combat simulations for training using wireless devices. To this end, the Joint Semi-Automated Forces (JSAF), combat simulation model and the Virtual Helicopter (VEHELO) training simulation entity are tested in an 802.11a wireless environment against the VEHELO application in a wired environment. 802.11a is proposed as part of an overall solution to deploy combat simulations for training. This is primarily because of its high data rates and ability to co-locate access points without interference. Testing reveals that operating JSAF and Virtual Helicopter via the High Level Architecture (HLA) with User Datagram Protocol (UDP) packets in an 802.11a environment provides ample bandwidth with which to deploy combat simulation for training for the simulations conducted.
Lieutenant, United States Navy

Thesis (M.S. in Electrical Engineering and M.S. in Systems Engineering)--Naval Postgraduate School, March 2004.
Thesis advisor(s): Clark Robertson. Includes bibliographical references (p. 143). Also available online.

Este trabalho estuda as potenciais melhorias na eficiência energética e vazão do método híbrido de requisição automática de retransmissão (Hybrid Automatic Retransmission Request, HARQ). A análise inclui as camadas física (PHY) e de acesso ao meio (MAC). É investigada a relação de compromisso gerada pelo HARQ, o qual demanda uma menor potência de transmissão para uma certa probabilidade de falha alvo ao custo de mais acessos ao canal. Uma vez que a competição para acesso ao canal na camada MAC é bastante custosa em termos de energia e atraso, os resultados mostram que a utilização do HARQ leva a uma grande melhoria de performance devido ao menor número de nós competidores – uma consequência da redução na potência de transmissão necessária. Contra-intuitivamente, esta análise leva à conclusão que retransmissões podem diminuir o atraso, melhorando a performance do sistema. Finalmente, são também investigados valores ótimos para o número de retransmissões permitidas, visando maximizar vazão ou/e eficiência energética.
This work studies the potential improvements in terms of energy efficiency and throughput of a hybrid automatic retransmission request (HARQ) mechanism. The analysis includes both the physical (PHY) and medium access (MAC) layers. We investigate the trade-off provided by HARQ, which demands reduced transmit power for a given target outage probability at the cost of more accesses to the channel. Since the competition for channel access at the MAC layer is very expensive in terms of energy and delay, our results show that HARQ leads to great performance improvements due to the decrease in the number of contending nodes – a consequence of the reduced required transmit power. Counter-intuitively, our analysis leads to the conclusion that retransmissions may decrease the delay, improving the system performance. Finally, we investigate the optimum values for the number of allowed retransmissions in order to maximize either the throughput or the energy efficiency.

Recent advances in wireless broadband networks and video coding techniques have led the rapid growth of wireless video services. In this chapter, we present a comprehensive study on the transmission of scalable video over wireless local area networks (WLAN). We analyze first the mechanisms and principles of the emerging scalable video coding (SVC) standard. We then introduce the IEEE 802.11 standards for WLAN and related quality of service (QoS) issues. We present some studies of SVC over WLAN using cross-layer design techniques. We aim to exploit the unique characteristics of the scalable video coding technology to enhance personalized experience and to improve system performance in a wireless transmission system. Examples and analyses are given to demonstrate system performances.

Wireless communications are becoming ubiquitous in homes, offices, and enterprises with the popular IEEE 802.11 wireless local area network (LAN) technology and the up-and-coming IEEE 802.16 wireless metropolitan area networks (MAN) technology. The wireless nature of communications defined in these standards makes it possible for an attacker to snoop on confidential communications or modify them to gain access to home or enterprise networks much more easily than with wired networks. Wireless devices generally try to reduce computation overhead to conserve power and communication overhead to conserve spectrum and battery power. Due to these considerations, the original security designs in wireless LANs and MANs used smaller keys, weak message integrity protocols, weak or one-way authentication protocols, and so forth. As wireless networks became popular, the security threats were also highlighted to caution users. A security protocol redesign followed first in wireless LANs and then in wireless MANs. This chapter discusses the security threats and requirements in wireless LANs and wireless MANs, with a discussion on what the original designs missed and how they were corrected in the new protocols. It highlights the features of the current wireless LAN and MAN security protocols and explains the caveats and discusses open issues. Our aim is to provide the reader with a single source of information on security threats and requirements, authentication technologies, security encapsulation, and key management protocols relevant to wireless LANs and MANs.

Recent development on the wireless networks has indicated that IEEE 802.11.x standards based wireless LAN and third-generation cellular wireless networks such as CDMA2000 or UMTS (i.e., WCDMA) could be integrated together to offer ubiquitous Internet access to end users. The two technologies can offer functions that are complementary to each other. The 802.11. x standards based wireless LANs support data rates from 1 Mbps to 54 Mbps. However, by IEEE 802.11.x standard, one access point (AP) can only cover an area of a few thousand square meters. It is perfectly applied for enterprise networks and public hot-spots such as hotels and airports. On the contrary, wireless cellular networks built with 3G standards can only support peak data transmission rates from 64Kbps to nearly 2 Mbps with a much wider area. It is reasonable and feasible to combine these two technologies to make Internet access much easier and more convenient. The design of an interworking architecture to efficiently integrate 3G cellular wireless networks and 802.11.x standard based wireless LANs is a challenge. Its difficulty lies in the objective of the integration, which is to achieve the seamless interoperation between the two types of the wireless networks with certain QoS guarantee and other requirements kept simultaneously, from the perspectives of both the end-users and the operators. There are basically two proposals as the solutions to the architecture of the integration. One is the tight coupling. The other is the loose coupling. Although there is no final selection on whether the future integrated network would use either of these techniques or another one, much focus of the research is on the loose coupling due to its feasibility. To implement the integration based on the corresponding approach, there are a lot of issues needed to be addressed. They are the mobility management for vertical handoff, the QoS maintenance during the vertical handoff, and the schemes of authentication, authorization and the accounting (AAA). In this article, we will focus on the issue of interworking architecture. The rest of the text is organized as follows. The second section will present the general ideas on the architecture of the integration of 3G cellular networks with wireless LANs. The third section will present several proposals on the architectures of the integration. At last, the fourth section will conclude the article.

Greater emphasis is now placed on ethics in information technology (IT) which covers a broad range of issues such as privacy, honesty, trustworthiness, software reliability, data storage, the environment, security breaches, hacking, viruses, and acknowledging the intellectual property of others. Further, legal aspects tend to overlap ethics perceptions. For example, issues such as copying computer programs, music CDs, images, or videos are more than just ethical problems; they also pose legal problems. The ethical dimensions also extend to issues such as computer crime and fraud, information theft, and unauthorized information dissemination. These ethical issues are becoming more complex as continuing advances in IT present many new ethical situations and fresh dilemmas. Developments such as the Internet, electronic commerce, and wireless/mobile communications present a new set of ethical issues and challenge current of codes of ethics, copyright laws, and their authors. In addition, computer users’ ethical standards may also vary from one situation to another (Wikipedia, 2005). What is ethical is subjective, and more so in the areas of IT. Perceptions of ethics in IT vary to a degree from individual to individual. Further, there seems to be significant differences in the perception of ethics among males and females. According to Adam (2000), male and female judgment is most often influenced by their personal values and whether an action is considered legal. Woodcock (2002) conducted a study on ethical perceptions among 405 male and female students from universities, technical colleges, and schools in North-Eastern Australia and found significant differences in some ethical situations between males and females. This article presents common issues and dilemmas that confront IT professionals, students, and the general community. In particular, it presents gender differences in perceptions of ethics and legalities in IT and highlights the different ethical perceptions of male and female students. These insights are particularly significant as the ethical beliefs and perceptions that students have may influence their ethical behaviors during their working careers.

In this chapter the authors explore and describe the role of the innovating firm in relation to the standards making process of Wireless-Local Area Networks, and in particular the link between NCR and its corporate successors in the creation of the IEEE 802.11 standard, which is at the basis of the global success of Wi-Fi. Their focus is the leadership role assumed by NCR c.s. responsible for the initiation and creation of an open standard for Wireless-LANs.