Download e-book for kindle: All about Vertical Antennas by William I. Orr, Stuart D. Cowan

By William I. Orr, Stuart D. Cowan

ISBN-10: 0933616090

ISBN-13: 9780933616097

This authoritative guide covers the layout, building, set up, and operation of fifty two vertical antennas.

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2 Support of multimedia services The second significant element introduced by UMTS that pushes the requirement for a new radio interface technology further is the support of multimedia services. Multimedia is one of those terms that is never clearly and consistently defined. Here, and throughout this book, we define multimedia as a collection of data streams between the user and some other end user(s) or application(s). The data streams that comprise this multimedia connection will, in general, have differing QoS characteristics.

10 R99 network architecture. networks based on the Internet family of protocols are the most likely networks for the GGSN to connect to). The functions provided by the GGSN include tunnelling of the protocol data units (PDUs) to the UE via the SGSN, as well as managing address mapping between the external data networks and the addresses used between the UE and the PS domain. 10 and is common to both the CS domain and the PS domain. 1. The UTRAN comprises all of the fixed network entities that are required to operate and control the AS, such as one or more radio network subsystems (RNSs), which are conceptually similar to the base station system (BSS) in the GSM system.

G. medium access control (MAC), radio link control (RLC) and RRC). The RNC is responsible for radio resource management within the RNS, handover, radio bearer (RB) control and macro diversity between different Nodes B (this is usually referred to as soft-handover and is considered in more detail in the next chapter). The Node B is similar to the concept of the base transceiver station (BTS) in GSM except that it may include multiple carriers with multiple cells. In essence, the Node B represents base site equipment as a whole and could include a number of sectors and different frequencies.

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All about Vertical Antennas by William I. Orr, Stuart D. Cowan

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