tailieunhanh - AD HOC NETWORKS Technologies and Protocols phần 2

bạn áp dụng lại hình ảnh đã lưu File1 và khởi động lại máy chủ. Bạn cố gắng để đăng nhập vào các tên miền bằng cách sử dụng thông tin tên miền. Tuy nhiên, bạn không thành công. Bạn cần phải đăng nhập vào File1 và thiết lập lại thành viên phạm vi của nó. | 6 Ad Hoc Networks in the overall wireless network classification Most researchers will view ad hoc wireless networks as a special subset of wireless networks. In fact the ad hoc radio technology and most of the MAC technology will be driven by the advancements in infrastructure wireless networks. The unique design features on ad hoc nets marking a departure from the former are in the network and transport protocol areas routing multicast ad hoc TCP and streaming etc . Another important family of ad hoc networks the sensor networks can in turn be viewed as a subset of ad hoc networks. There are differences however. At the physical MAC and network layers the major innovations and unique features of sensor nets which set them apart from conventional ad hoc networks are the miniaturization the embedding in the application contexts and the compliance with extreme energy constraints. At the application layer the most unique and novel feature of sensor nets is undoubtedly the integration of transport and in-network processing of the sensed data. Ad Hoc Network Applications Identifying the emerging commercial applications of the ad hoc network technology has always been an elusive proposition at best. Of the three above mentioned wireless technologies - cellular telephony wireless Internet and ad hoc networks - it is indeed the ad hoc network technology that has been the slowest to materialize at least in the commercial domain. This is quite surprising since the concept of ad hoc wireless networking was born in the early 70 s just months after the successful deployment of the Arpanet when the military discover the potential of wireless packet switching. Packet radio systems were deployed much earlier than any cellular and wireless LAN technology. The old folks may still remember that when Bob Metcalf Xerox Park came up with the Ethernet in 1976 the word spread that this was one ingenious way to demonstrate packet radio technology on a cable Why so slow a progress in .