A DECISION-TREE APPROACH TO ANALYZING CHANNEL ALLOCATION ALGORITHMS FOR TWO-TIER WIRELESS LOCAL LOOPS

A wireless local loop (WLL) uses radio signals to connect customer premise equipment (CPE) to a public switched telephone network (PSTN). It has the potential to help the telephony providers overcome the “last mile” problem in delivering telephony services. A typical WLL consists of a base station controller (BSC), a base station (BS), and subscriber terminals (STs). A WLL can be single-tier, two-tier, or threetier, based on the configuration of the cells within it. There are numerous channel allocation algorithms for two-tier WLLs. These algorithms include no repacking, always repacking, repacking on demand— random, repacking on demand—least load, and repacking on demand—subscriber terminal. This paper provides a decision-tree approach to analyzing these channel allocation algorithms for designing two-tier WLLs. The generated decision-trees can not only help us understand these channel allocation algorithms better, but can also serve as a basis for constructing simulation models and eventually implementing simulation programs for the purpose of comparing the performance of the different network designs

The Digital Divide… Teach A Man To Fish!

Recently Kim Hak-Su, Executive Secretary of the United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP) that co-organized the regional conference together with the Japanese Government and other collaborators, acknowledged that more work is needed. The Tokyo Declaration is directional , he said. We need more meetings

Promoting Competition in Telecommunications

There is a growing recognition of the importance of competition for the success of market economies, and of the need for government action both to maintain competition and to regulate industries where competition remains limited. In the area of telecommunications, upon which I shall focus today, we have seen examples where privatization has not delivered on its promises: in some cases access in certain vital areas has actually been reduced. Competition and regulatory policy are vital for a market economy. The fundamental theorems of welfare economics, assume that both private property and competitive markets exist in the economy. Until recently, however, emphasis was placed almost exclusively on creating private property, and privatization of public assets. A well designed privatization, where there is a good regulatory framework in place, can raise enormous revenues and at the same time increase services and lower prices.market economies; government; competition; regulate industries; telecommunications

Base station transceiver design in a digital wireless local loop system

During the past ten years the mobile radio communications industry has significantly grown. The miniaturization technologies have allowed smaller and smaller portable terminal radio equipment. People throughout the world have been adhering to the wireless communications methods and services mainly of the public cellular mobile network. The digital cellular mobile networks already implemented all over the world such as for instance, the GSM, PDC and IS-95 provide a very low bit rate which is inefficient for data and video services. Higher bit rate mobile networks are now under research and development. This paper describes a base station transceiver for a higher bit rate digital wireless local loop communications syste

Overview: Pipelines of the Skies

Advances in fixed satellite technology are enabling oil and gas concerns to enhance the efficiency of offshore operations with cost-effective voice and data network solutions

It is time to use the Ku-band in Indonesia

Satellite Communications Systems are infrastructures that can be used for broadband multimedia applications. In the communication satellite field, the C-band (4-6 GHz) frequencies have been used since the beginning and are now saturated. The Ku-band (11-18 GHz) has been used also for communication satellite systems, because with this frequency a bigger bandwidth can be applied. The Ku-band has other advantages, such as avoidance of interference with terrestrial microwave systems that often use the C-band frequency. However, for Indonesia, the use of the Ku-band needs a thorough examination because frequencies above 10 GHz are vulnerable to rain, especially heavy rain that often occurs in Indonesia. This article examines the possibility of using the Ku-band for satellite communication systems in Indonesia

Cho kosoku hikari kukan tsushin shisutemu ni okeru denpa tokusei no kenkyu

制度:新 ; 文部省報告番号:甲2361号 ; 学位の種類:博士(国際情報通信学) ; 授与年月日:2007/2/7 ; 早大学位記番号:新443

The race for telecoms infrastructure investment with bypass: Can access regulation achieve the first best?

We analyze the impact of mandatory access on the infrastructure investments of two competing communications networks, and show that for low (high) access charges ?rms wait (preempt each other). Contrary to previous results, under preemption a higher access charge can delay ?rst investment. While ?rst-best investment cannot be achieved with a ?xed access tari¤, simple instruments such as banning access in the future, or granting access holidays right after investment, can improve e¢ ciency. The former forces investment when it would happen too late, while the latter allows for lower access charges in order to delay the second investment when it would happen too early.

CARTELS, MEDIA AND TELECOMMUNICATIONS - THE RAPIDLY CHANGING FACE OF AUSTRALIAN COMPETITION REGULATION

[Australia’s Trade Practices Act is a piece of legislation that is constantly evolving to deal with the constantly evolving processes and practices of business – good and bad. Regardless of whether the country’s main tele- communications company, Telstra is privatised, or whether we get one or a hundred new TV channels or even abandon our TV sets for computer screens, the Trade Practices Act will continue, as it has done now for 30 years, to evolve with the economy to continue to protect and promote com- petition for the good of the Australian people.]