Also, next generation 4G wireless technologies (see Chapter 23) are evolving toward OFDMA and IP-based networks as they are ideal for delivering cost-effective high-speed wireless data services. WiMAX can be used in disaster recovery scenes where the wired networks have broken down. It aims to provide business and consumer broadband service on the scale of the metropolitan area network (MAN). Philippe Desfray, Gilbert Raymond, in Modeling Enterprise Architecture with TOGAF, 2014. We will cover the system and technology architectures with more detail in subsequent chapters, where they are more appropriately addressed. All rights reserved. A channel quality indicator (CQI) channel is used to provide channel state information from the user terminals to the BS scheduler. Technology & Architecture. It enables the migration problems that can arise between the different steps of the IS evolution path to be studied earlier. The frame duration is 5 ms. Each frame has 48 OFDM symbols with 44 OFDM symbols available for data transmission. Just as buildings are structures made for people to live in and look at, enterprises are structures made by people for people as a space for interactions and transactions. With its large range and high transmission rate, WiMAX can serve as a backbone for 802.11 hotspots for connecting to the Internet. What many teams don’t know is that the opposing team may install a backdoor or other tool that allows access to the compromised system. It contains the core architectural artifacts created during a project. In information systems, applications architecture or application architecture is one of several architecture domains that form the pillars of an enterprise architecture (EA).. An applications architecture describes the behavior of applications used in a business, focused on how they interact with each other and with users. Its components are generally acquired in the marketplace and can be assembled and configured to constitute the enterprise’s technological infrastructure. In this process, the intruder may erase log files, remove IDs, stop backup systems, and more. Support for QPSK, 16-QAM, and 64-QAM are mandatory in the downlink with mobile WiMAX. The WiMAX specification improves upon many of the limitations of the Wi-Fi standard (802.11b) by providing increased bandwidth and stronger encryption. Mobile devices connected directly can achieve a range of 4 to 6 miles, because mobility makes links vulnerable. The two primary deliverables from this grouping are: Architectures: design and implementation of the technology and product architectures, Operations: operating, monitoring, and tuning the BI environment. Flexible key management schemes assure that security is maintained during handoff. The PHY design for the 2–11 GHz range (both licensed and unlicensed bands) is more complex because of interference. The 802.16 PHY supports TDD and full and half duplex FDD operations; however, the initial release of mobile WiMAX only supports TDD. This technique optimizes the use of spectrum resources and enhances indoor coverage by assigning a robust scheme to vulnerable links. Jiang Zemin, in On the Development of China's Information Technology Industry, 2010. This blurs the initial distinction and allows for widespread adoption of WiMAX based mesh networks and promises widespread WiMAX adoption. Based on these review points, if you need to: Standardize your infrastructure technology architecture, Standardize your application architecture, Show results within 12 months from an EA program, Control scope and resource commitments carefully. Enterprise-level technology architectures ensure that the enterprise is developing the right applications on the right platforms to maintain the competitive edge that they are striving for. The inclusion of multi-input multi-out (MIMO) antenna techniques along with flexible sub-channelization schemes, advanced coding and modulation all enable the mobile WiMAX technology to support peak downlink data rates of 63 Mbps per sector and peak uplink data rates of up to 28 Mbps per sector in a 10 MHz channel. These passwords are frequently stored near their computer system. This group manages the enterprise’s infrastructure such as networks, hardware (servers, PCs, tablets), storage, and databases. WiMAX can typically support data rates from 500 kbps to 2 Mbps. With administrator rights, the intruder can change the system configuration or read, delete, or modify software applications and data. Release 1 of mobile WiMAX will cover 5, 7, 8.75, and 10 MHz channel bandwidths for licensed worldwide spectrum allocations in 2.3 GHz, 2.5 GHz, 3.3 GHz, and 3.5 GHz frequency bands. Technology architecture associates application components from application architecture with technology components representing software and hardware components. The 802.16 MAC protocol is connection-oriented and performs link adaptation and ARQ functions to maintain target bit error rate while maximizing the data throughput. With these data infrastructure mechanisms in place, the architectures have a chance of surviving the onslaught of the chaos brought about by changing priorities, strategic advantage, and just plain emergencies. Table 21.19. It defines service flows which can map to DiffServ code points or MPLS flow labels that enable end-to-end IP based QoS. Because every organization has a unique technology architecture, the actual process used by the opposing team to attack information systems will vary. WiMAX is an advanced technology solution based on an open standard, designed to meet the need for very high speed wide area Internet access, and to do so in a low-cost, flexible way. Mobile WiMAX systems offer scalability in both radio access technology and network architecture, thus providing a great deal of flexibility in network deployment options and service offerings. architecture: In information technology, especially computers and more recently networks, architecture is a term applied to both the process and the outcome of thinking out and specifying the overall structure, logical components, and the logical interrelationships of a computer , its operating system, a network , or other conception. Other improvements for mobile devices include a real-time polling service to provide QoS, HARQ scheme to retransmit erroneous packets, and private key management schemes to help with the distribution of encryption keys. This does not mean that system performance will also stop growing, but that the means of achieving it will rely on other innovations through alternative device technologies, architectures, and even paradigms.