[map] On The Spectrum Availability, The Impact Of Mobile Tv Solutions - Mobile Tv, Spectrum,

Of: William Jones, Chief Operating Officer Dr

Of: William Jones, Chief Operating Officer Dr. IPWireless

The mobile operators for non-voice revenue growth, the end user of the range of advanced multimedia applications and business demand is also growing rapidly. Those expected from other sources of revenue growth operators can download games, applications, and track and so on have been successful. Mobile TV provides a potentially profitable business, this is the current number of operators to consider.

Currently, 3G operators (such as the UK's Vodafone) is based on the existing WCDMA network to broadcast mobile TV transmissions. However, as more users switch to 3G, the existence of the risk of network congestion. It encourages the industry to actively seek alternative technologies to meet the new requirements, carriers now have begun to DVB-H system as a possible solution to test. And Qualcomm are also constantly developing its MediaFLO technology to make it a solution, is now the United States carriers that use this system.

While the two technologies can meet the technical requirements for sending mobile TV, but mobile operators, the commercialization of each technology there shortcomings. Both systems require operators to cooperate with third parties to use their spectrum, and the need for additional infrastructure expansion. In addition, there are many mobile broadcast spectrum-related issues can be resolved.

The limited spectrum available Spectrum is a very valuable resource. The limited available spectrum and the growing needs of the user throughput force people to seek the highest possible from the technical spectrum efficiency. Thus, the lower spectrum efficiency technology will be eliminated, replaced by update, bandwidth-efficient technologies. For example, in radio and television applications, analogue technology replaced by digital technology. However, in many of these in the development process, the old technology out of a process, which, in the new technology before fully replace the old technology, old technology occupied spectrum resources for new technology is unavailable.

Figure: Available in different parts of spectrum allocation

The limited available spectrum resources of yet another effect is that when the spectrum in the open market with the availability, the spectrum will have a high potential value. For example, in 2001 Britain's first IMT-20003G license auction of around 40 million. Obtain 3G licenses operators can use the dual-mode and single frequency TDD FDD mode. This reflects the two technologies within the 3GPP synchronous development and standardization. In addition, the first IMT-2000 spectrum allocation in many European and Asian countries have been coordinated.

In the application of wireless spectrum allocation of the benefits of technology transfer is effective in non-symmetric uplink and downlink data rates, such as time division duplex uplink and downlink communications. This is because to change the uplink and downlink transmission between the switching point, so that the downlink data rate higher than the uplink rate. Therefore, operators of spectrum allocation for broadcast content to mobile users.

In addition, regional coordination in various geographic spectrum also allows operators to bulk purchases of equipment, access to economies of scale advantage of that. Likewise also enables users to roam between multiple areas. Currently, many operators already have or be able to use the Spectrum.

UTRA TDD advantage Clearly, the mobile user to send broadcast content, IMT-2000 spectrum allocation to provide a lot of possibilities. However, for content broadcasting technology also need to meet certain requirements. For example, to make this broadcast for operators and content providers is feasible and cost effective in the business availability, price and quality and so on, and use other technologies (such as DVB-H and MediaFLO) provided Compared to similar businesses competitive.

Business availability, the target user base for a successful mobile broadcast should be easy to use. This means that the business in its coverage area to ensure a lower break rate. In addition, from a business perspective, the next few years, mobile radio business environment will become an arena, it is bound with other technologies to provide business competition. Similarly, relative to the broadband Internet access, users usually do not want to pay for broadcast content. Together these factors requires that mobile broadcasting technology to meet the low cost terminal and infrastructure requirements, while operating expenses or the cost of sending the content should be low.

Digital satellite and through terrestrial broadcast technology, users expect content in broadcasting have a better choice. Although the change from fixed to mobile technical difficulties exist, but the user's expectations have been identified, and they can not tolerate poor service quality. In the fierce competition in the mobile environment, not just the number of requests for similar high-quality broadcast channels, also called the move to achieve the same quality of services. To meet these expectations, the typical mobile radio spectrum efficiency technology goal is to 1bps/Hz, and in 95% of the coverage area to provide consistent quality of service.

Recently announced a solution to business UMTSTD-CDMA performance advantages of the program and the newly defined standard of multimedia broadcast and multicast (MBMS) the combination sixth edition, as opposed to alternative mobile TV solutions, the program operators to offer a great strategy, performance and economic advantages. TD-CDMA or UTRATDD achieve standardization in 3GPP, and WCDMA (also known as UTRAFDD) to achieve a high degree of coordination. This technique can be used to effectively send the mobile broadcast content.

As part of 3GPP standard, TD-CDMA for IMT-2000 standard to consider the spectrum allocation. 2GHz frequency in the vicinity of the deployment of mobile broadcast most of the general use of cellular topology, and independent of the underlying technology. With this in mind, the use of standardized cellular technology to send mobile broadcast content of these bands makes sense. Although the model using 3GPP UTRAFDD

to send content to mobile users is feasible, but it positioned symmetrical operations, using a dedicated signaling vector. With the popularization of technology, therefore, in the uplink and downlink traffic will exist on a large number of non-symmetry of the spectrum and low efficiency, the network will soon enter the overload condition.

The UTRA TDD, a key advantage is that with the existing UTRAFDD highly coordinated. This means that equipment and software to share network infrastructure, that 3G operators can use existing equipment for UTRATDD UTRAFDD cellular station broadcasting services, such as total

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