Mobile computing - what is mobile computing?

 

What is mobile computing?

Mobile computing is a new technology emerging with the improvement of cell verbal exchange, the Internet, database, allotted computing, and other technologies. Mobile computing technology will empower computers or other data keen terminal gadgets to acknowledge information transmission and asset partaking in a remote environment. Its role is to give valuable, precise, and opportune data to any client, whenever, anyplace. This will significantly impact the manner in which individuals live and work.

 

Basic concept

Mobile computing is an emerging technology that is interdisciplinary and covers a wide range.

In 2003, the "Centrino" mobile computing technology created by Intel Corporation is a mobile computing technology stage including another Pentium-M processor, Intel 855 chipset, and Intel PRO wireless network connection module. Open up a new milestone in the history of human computing development, bringing unprecedented freedom and computing experience to people's life and work. The application of this technology will also really improve the portability of mobile terminals, and then give birth to too many new functional design and application models. At the same time, the new mobile computing technology will bring new business opportunities to China's communications and computing industries. , will promote the emergence and development of new value chains.

Mobile computing uses various radio frequency (RF) technologies or cellular communication technologies to allow users to roam freely with their mobile computers, personal digital assistants (PDAs), BPs, and other telecommunications equipment. Mobile computer users with modems should also fall into this category, but they focus on wireless remote users. Mobile computer users rely on electronic messaging services to keep them connected to the office wherever they go. Some vendors, Microsoft, are making special interfaces to support mobile users. For example, when a mobile user moves from one place to another, the desktop arrangement and files opened in the last session will be restored as if the computer were never turned off.

The supposed mobile computing is quite to give top-notch data administrations (data capacity, question, computation, and so forth) to mobile users (including laptop computers, palmtop computers, mobile phones, pagers, and so on) disseminated in different locations. The designed database system can provide data services to various user terminal equipment safely, quickly, and effectively.

With the rapid development of semiconductor technology, the processing power and storage capacity of high-end mobile computers have allowed them to manage databases that were not long ago considered "hyper-scale", supporting some complex database management tasks, as shown in Fig. Show.

Mobile computing is a new type of technology that enables a computer or other information device to transmit data without being connected to a fixed physical connection. It is predicted that by 2002, 80% of business users will require a remote or mobile solution. The function of mobile computing is to interact with the central information system and share the computational pressure of the central information system so that useful, accurate, and timely information can be given to any client who needs it whenever and at any place.

"New workspace" refers to new supporting hardware expected by mobile workers because of business needs. The "New Workspace" arrangement upholds new end-user roles: Data Miner (the people who require broad and quick admittance to data); Job Owner (ie control of all errands in a "unit of work") engineering and technical personnel); and Mobile and Flexible Employee, i.e., workers whose work environments change oftentimes.

There are two categories of computing concerned with mobile properties - Mobile Computing and Mobile Computation. The former is concerned with computing on wireless network-based mobile devices (such as laptops, PDAs, etc.); while the latter is concerned with Web-based mobile programs, such as Applet and Agent, here we collectively refer to mobile computing. The communication characteristics of wireless networks and the natural distribution of the geographic location of the Web require computational mobility as an effective method to overcome or solve problems such as network bandwidth fluctuations, unstable connections, and long waiting times.

As the mobile computing market continues to expand, more and more thin clients and non-PC devices are joining the "new workspace" network, and many vendors are establishing a wider range of thin client standards, applications, and Basic software.

 

Core Technology

Processor - Mobile Computing

Single-core processor

The core (main die), also known as the core, is the most important part of the CPU. The raised chip in the center of the CPU is the core, which is manufactured from monocrystalline silicon by a certain production process. All kinds of CPU cores have a fixed logical structure, and logical units such as first-level cache, second-level cache, execution unit, instruction-level unit, and bus interface will have a scientific layout. A processor has only one logical core.

Single-core processor - Mobile Computing

Dual-core processor

Dual-core processors refer to the integration of two computing cores on one processor to increase computing power. The concept of "dual-core" was first proposed by IBM, HP, Sun, and other high-end server manufacturers that support RISC architecture. However, due to the high price and narrow application scope of RISC architecture servers, it has not attracted widespread attention.

 

The concept of "dual-core" that has gradually become popular recently mainly refers to the dual-core technology based on the X86 open architecture. In this regard, the leading manufacturers are mainly AMD and Intel. Among them, the two ideas are different. AMD was designed with multi-core support in mind from the start. All components are wired directly to the CPU, eliminating system architectural challenges and bottlenecks. Two processor cores are wired directly to the same core, and the cores communicate at chip speed, further reducing inter-processor latency. Intel, on the other hand, uses multiple cores to share the front-end bus. Experts believe that AMD's architecture is easier to implement dual-core or even multi-core, while Intel's architecture will encounter the bottleneck problem of multiple cores competing for bus resources.

From the perspective of dual-core technology itself, what exactly is dual-core? There is no doubt that dual cores should have two physical computing cores, and there is much to be done about the design and application of these two cores. According to the available information, AMD Opteron processors were designed with the addition of the second core in mind from the beginning. Both CPU cores use the same system request interface SRI, Hyper Transport technology, and memory controller, compatible with 90nm single-core processing 940-pin interface used by the device. Intel's dual cores, on the other hand, simply use two complete CPUs packaged together, wired to the same front-end bus. It can be said that AMD's solution is a true "dual-core", while Intel's solution is a "dual-core". It is conceivable that such two cores will definitely produce transport disputes and influence execution. Not only that, but it also lays a hidden danger for the integration of more cores in the future, because it will intensify the processor's contention for the front-end bus bandwidth and become a bottleneck for further developing framework execution, still up in the air by the engineering. Therefore, it can be stated that AMD’s technical structure has laid a solid foundation for the conclusion of dual-core and multi-core and multi-core. AMD direct-connect architecture (that is, the CPU core is directly connected to external I/O through Hyper Transport technology, not through the front-end bus) and integrated memory controller technology, so that each core has its high-speed cache available for use, all have their dedicated lane pass-through I/O, there is no resource contention problem, and it is easier to achieve dual-core and multi-core. In Intel, multiple cores share secondary caches and use front-end bus bars. When the number of cores increases and the processing power of the cores increases, just like the large communities developed in the suburbs of Beijing, multiple communities use the same urban expressway. There will be traffic jams.

HT technology is hyper-threading technology and a weapon that created a glorious era of PENTIUM 4. Although the fact that it was evaluated as a failed technology, it assumed a specific part in advancing P4. A dual-core processor is a brand-new processor category; HT technology is to implement two logical processors in the processor, which is to make full use of processor resources. Dual-core processors integrate two physical cores, which are dual-core processors in the actual sense. The HT technology quoted by Modern Computer magazine is like a chef who can cook vegetables with both hands at the same time, and puts one dish on the table at a time; while a dual-core processor is like two chefs cooking two dishes, and Bring two dishes to the table at the same time. Dual-core processor performance is better. From a technical point of view, the PENTIUM D 8XX series is not a dual-core processor in the actual sense, but the integration of two processors, but the PENTIUM D 9XX is a dual-core processor in the actual sense, and the K8 is a dual-core processor in the actual sense from the very beginning.

Dual-core processor - Mobile Computing

Dual-core dual-core

 

AMD and Intel's dual-core technologies are also physically very different. AMD makes two cores on one die (chip) and connects them through a direct-connected architecture, resulting in a higher level of integration. Intel encapsulates two cores on different Dies (chips) together, so some people call Intel's solution "dual-core" and think that AMD's solution is the real "dual-core". From the user's point of view, AMD's solution can make the pins, power consumption, and other indicators of dual-core CPU consistent with that of single-core CPU. Upgrading from single-core to dual-core does not require the replacement of a power supply, chipset, cooling system, and motherboard. Just need to refresh the BIOS software, which is extremely helpful to the speculation assurance of motherboard makers, computer manufacturers, and end clients. Customers can leverage their existing 90nm infrastructure and migrate to dual-core-based systems via BIOS changes.

Computer manufacturers can easily offer single-core and dual-core versions of the same hardware, enabling customers who want to improve performance while maintaining the stability of their IT environment to upgrade to dual-core without disrupting their business. In an environment with higher rack density, customers will experience dramatic improvements in system performance by migrating to dual-core while maintaining power and infrastructure investments. In the same system footprint, by using dual-core processors, customers will gain a higher level of computing power and performance.

Processors - Mobile Computing

Indicator technology

Mobile computing is the fusion of messaging technology and wireless communications. Companies like RAM Mobile Data have also joined, not only with the communication side but also with user interface support. Typical users include domain service experts who need technical information, insurance representatives who make estimates, and salespeople who need the information to make investment decisions. One way to obtain information is to simply connect to the company database and conduct real-time queries, reducing message transmission and telephone charges. The mobile user simply sends an e-mail message through a database query to the database server, which then generates a response and places the response in the mailbox that the user will query later.