外文翻譯---基于web服務(wù)的無(wú)線食品點(diǎn)菜系統(tǒng)-其他專業(yè)-文庫(kù)吧資料
2025-01-27 09:28本頁(yè)面
【正文】 h information. The convenience and powerful functionality offered by mobile devices such as PDAs, has encouraged many people to investigate the benefits of using them. Wireless and handheld devices abound as vendors pitch the mon themes of onetoone puting, instant munication and anytime, anywhere information access. While web services provide a technology for serviceoriented puting. Web services allow programs written in different languages on different platforms to municate with each other in a standard way . By integrating these technologies, consistent business models can be implemented on a broad array of devices: not just on mobile devices operating over mobile works, but also on servers and PCs connected to the Inter. The food ordering process in restaurants requires the coordination of simple tasks. Instruction flows mainly from customers to waiters then to kitchen and/or the bar staff, finally to the cashier . In a medium to large and busy restaurant this coordination is a challenge and requires an efficient ordering system. Errors in ordering processes lead to incorrect or out of sequence meal preparation or nonconsumable and results in added cost to the business. This paper presents an integration of wireless munication technologies and web services technologies to realize a wireless food ordering system. In this system, it implements wired and wireless data access to the servers and food ordering functions through both desktop PCs and mobile devices such as PDAs over a wired/wireless integrated local area work. The system is based on secure web service architecture and some security strategies to ensure mobile munication security are adopted. Web servicesbased wireless applications on mobile devices provide a means of convenience, improving efficiency and accuracy. II. W IRELESS LAN AND W EB SERVICES A. Wireless LAN A wireless LAN (WLAN, Wireless Local Area Network) is a flexible data munication system implemented as an extension to or as an alternative for, a wired LAN within a building or campus . Using electromagic waves, WLANs transmit and receive data over the air, minimizing the need for wired connections. Thus, WLANs bine data connectivity with user mobility, and, through simplified configuration, enable movable LANs. The IEEE group of standards specifies the technologies for wireless LANs. standards use the Ether protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing and include an encryption method, the Wired Equivalent Privacy algorithm. The , b, and g standards are the most mon for home wireless access points and large business wireless systems. A remote user can use WLAN to access the Inter through public access points (“hotspots”) provided by service providers. When in the office, they may access WLAN through wireless access points. In enterprise environments, WLANs are usually plemented by security mechanisms, such as VPN (Virtual Private Network). Over the last several years, WLANs have gained strong popularity in some markets, including the healthcare, retail, manufacturing, and academic areas. These industries have profited from the productivity gains
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