By Benny Bing
This ebook discusses the layout, functionality and implementation of entry protocols with emphasis on how such protocols can successfully aid disparate periods of multimedia site visitors. those protocols are deployed or experimented in numerous broadband instant environments resembling instant ATM, satellite tv for pc networks, cellular mobile and private verbal exchange platforms, instant neighborhood loops, instant neighborhood sector networks, and others. in addition to a complete creation and survey to the evolution of entry protocols, a number of the most popular subject matters of present curiosity are lined. those contain:
- Connection keep watch over and QoS provisioning.
- site visitors load balancing strategies.
- advancements in complicated CDMA/TDMA/OFDM platforms.
- foreign standardization efforts (e.g., 3G, IMT 2000).
- rising broadband instant entry (e.g., instant ATM, satellite tv for pc ATM, high-speed instant LANs).
- the total layout, functionality research, simulation and protocol verification of a generalized broadband a number of entry protocol.
whereas engineering points are mentioned, the emphasis is at the actual knowing of entry protocols, from uncomplicated proposals to the most recent techniques. Mathematical therapy is saved to a minimal, and such a lot of the basic suggestions are defined in accordance with instinct and insights, supplemented by way of a variety of illustrative figures. moreover, those thoughts are expressed succinctly and concisely. anywhere attainable, very important references that make significant contributions to the box are integrated for readers to enquire additional. most modern updates and precious internet assets are published on the book's internet website.
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Additional resources for Broadband Wireless Access
For example, lower frequencies tend to penetrate objects better while high frequency signals encounter greater attenuation. 1 Received Power Characteristics For line-of-sight distances in the vicinity of the receiving antenna, signal attenuation is close to free space. This means that the received signal power decreases with the square of the distance between the transmitter and receiver. For instance, the signal strength at 2 m is a quarter of that at 1 m. 4). 2 High Frequency Propagation A high operating frequency implies an abundance of bandwidth.
1 Inter-cell versus Intracell Handoff When the user crosses two adjacent radio cells, an intercell handoff is required so that an acceptable link quality for the connection can be maintained. Sometimes an intracell handoff is desirable when the link with the serving base station is affected by excessive interference, while another link with the same base station can provide better quality. , AMPS). With NCHO, the link quality is monitored only by base stations. The handoff decision is made under the centralized control of a mobile telephone switching office (MTSO).
29, No. 11, November 1991, pp. 42 – 46. , Rappaport, T. , Wireless Personal Communications: Research Developments, Kluwer Academic Publishers, 1995. , “Antennas and Propagation for Wireless Communications”, Proceedings of the 46th IEEE Vehicular Technology Conference, 1996, pp. 1 – 5. , Salz, J. , “The Impact of Antenna Diversity on the Capacity of Wireless Communication Systems”, IEEE Transactions on Communications, Vol. 42, No. 2/3/4, February/March/April 1994, pp. 1740 – 1750. This page intentionally left blank Chapter 2 WIRELESS ACCESS PROTOCOL DESIGN The basic element of a wireless access protocol is to allow a large group of uncoordinated users to share the same communications resource in a mutually cooperative and efficient manner.