Goodman, "Trends in Cellular and Cordless Communications," IEEE Communications Magazine, Vol. 29, No. 6, pp. 31-40, Jun. 1991.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... analog FM cellular mobile systems, b) use of such handsets, or lower power versions, in area outside or in buildings covered by smaller lower power cells (microcells) within an existing cellular system, c) use of high power digital pocket handsets in next generation digital cellular mobile systems[6]. 3. PCNs with some of the following alternatives: a) overlay wire, fiber or fixed radio interconnected networks with some type of radio access, b) low power radio access to local exchange company fixed copper and fiber distribution networks for third small, low power pocket voice and data sets, ....

Goodman, D.J. "Trends in cellular and cordless communications", IEEE Commun. Mag., pp.3140, June 1991.

.... used is deterministic (a policy such as TDMA could be used, for example) The reason for this choice is that most proposed standards for communication within a cell such as, the European standard (GSM) the North American standard (IS 54) and another PanEuropean standard (DECT) use TDMA (see [3]) 2.2 Some Examples of the Effects of Mobility Figure 2 illustrates a system in which cells c, c2, cs and ca contain mobiles that belong to . Thus (c, c2, cs, ca. Three types of moves are illustrated in the figure. In the first type of move, a MH moves from cell c into cell H. Cell H does not ....

David J. Goodman. Trends in cellular and cord- less communications. IEEE Communications Magazine, pages 31-40, June 1991.

....change is known as a handoff. In first generation cellular systems like the Advanced Mobile Phone System (AMPS) 1, 2] handoffs were relatively simple. Second generation cellular systems like the Global System for Mobile Communications (GSM) and the Personal Access Communication System (PACS) [2, 3] are superior to first generation ones in many ways, including the handoff algorithms used. More sophisticated signal processing and handoff decision procedures have been incorporated in these systems. The control decision structures have been improved so that in progressing from ....

D. J. Goodman, "Trends in Cellular and Cordless Communications, IEEE Commun. Mag., vol. 29, no. 6, June 1991, pp. 31--40.

....these proposals are the way location information is propagated in order to trace a moving host and how packets are forwarded to the current location of a mobile host. There are four common strategies proposed for finding the current location of a mobile host: broadcast [9] address consultant [1, 3], location cache [11, 14, 15, 16] and forwarding pointers [9, 10, 16] Broadcast is too expensive for frequent use in a large network, but selective broadcast in a given area is workable. An address consultant is a directory system central or distributed that holds the current location of ....

D. Goodman, "Trends in Cellular and Cordless Communications, " IEEE Communications Magazine, vol. 29, no. 6, pp. 31-40, June 1991.

....and load sharing jobs based on tickets and a mechanism of billing the clients using tickets has been discussed in Section 4. In Section 5, we present conclusions and suggestions for future work. 2 Background In order to support high data rates across networks, a micro cellular architecture [5,7] has been proposed. Kevin and Singh [10] proposed a three level hierarchical architecture for wireless networking in mobile computing. At the lowest layer is the MH, as shown in Figure 1, which communicates with the MSS node in each cell. The SH controls several MSSs. The SH is connected to the ....

Goodman, "Trends in Cellular and Cordless Communications," IEEE Communications Magazine, pp. 31-40, June 1991. 10

....formulation, and its implication in certain fading models highlighted. Broadcast fading channels will then be briefly mentioned. We shall pay special attention to cellular fading models, due to their ubiquitous global spread in current and future cellular based communications systems [44] [113], 170] and [273] Specific attention will be given to Wyner s model [331] and its fading variants [268] 255] focusing on the 2624 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 44, NO. 6, OCTOBER 1998 information theoretic aspects of channel accessing inter and intracell protocols such as ....

.... in reference to cellular communications (see [255] 108] and [158] 7) Cellular Fading Models: The rapidly emerging cellular communications spurred much theoretical research into fading channels, as the time varying fading response is the basic ingredient in different models of these systems [113], 44] 255] Numerous information theoretic studies of single cell models emerged in recent years in an effort to identify, via a simple tractable model, the basic dominating parameters and capture their effect on the ultimate achievable performance. Many of these models (see relevant ....

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D. J. Goodman, "Trends in cellular and cordless communications," IEEE Commun. Mag., pp. 31--40, June 1991.

....an object that stores the identification of the overloaded processors. During distributed diagnosis of a global problem in the network, this object is read extensively, whereas at other times it is mainly written. Other examples of logical interconnections represented by a tree can be found in [Goodman 1991; Imielinski and Badrinath 1992] Complex object distribution. Observe that adaptive replication can also be used for determining complex object distribution. Complex object distribution is the problem of establishing how a complex object is partitioned replicated in a computer network, i.e. ....

Goodman, D. 1991. Trends in cellular and cordless communications. IEEE Communications Magazine, 31--40.

....data, are presented first. The PRMA with some modifications was also simulated for variable bit rate video transmission. Packet Reservation Multiple Access The PRMA protocol was initially proposed for terrestrial microcellular networks where it exhibits very interesting features such as [ 7] [8], 9] management of voice and data traffics for future multimedia applications, compatibility with the ATM standard, high efficiency expressed by a high multiplexing gain value, dynamic PRMA carrier allocation to cells, transparent behaviour with respect to user mobility. The satellite segment ....

D. J. Goodman, "Trends in Cellular and Cordless Communications", IEEE Comm. Mag., Vol. 29, pp. 31 - 40, June 1991.

....dissertation : 3 2.1 The CCITT ATM cell format (from [Hayter 93] 7 2.2 Simplified architecture of GSM PLMN system (from [Steele 92] 12 2. 3 Architecture of the WINLAB Cellular Packet Switch (from [Goodman 91b] 13 2.4 Wireless addition to the ATM protocol stack (from [Raychaudhuri 94] 18 3.1 Minimum hop tree for the network interface p : 30 3.2 Minimum hop trees in a partitioned network : 37 3.3 Network with single ....

....like GSM in Western Europe. Although the second generation cellular networks provide high capacity and improved support for mobility, the difference in standard prevents the mobile users from roaming between the countries with heterogeneous cellular approaches. The vision of the Third Generation [Goodman 91b] is a unified wireless access to the advanced information services. The third generation network subscribers are also expected to be able to handle the multimedia traffic in a location independent manner. This new Personal Communication Networks (PCNs) will merge the separate first and second ....

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D. J. Goodman, "Trends in Cellular and Cordless Communications," IEEE Communication Magazine, June 1991, pp. 31-40.

....access to the same wireless medium using frequency division, time division, and code division. Even if fixed channel assignment is dominant in the present implementations, packet oriented techniques are getting increasing attention for the definition of the third generation wireless networks [1]. The intrinsic advantages of packet multiplexing are those well known in wired networks. First, packetized voice can exploit speech on off activity to improve bandwidth efficiency by performing multiplexing at the talkspurt level. Second, the packet multiplexing technique results very ....

D.J. Goodman, "Trends in cellular and cordless communications ", IEEE Comm. Mag., vol. 29, pp. 31-40, Jun. 1991.

....personal communications. The high capacity, required on the radio interface to support a high penetration in densely populated urban areas, can be obtained only through an effective use of the available bandwidth. This is one of the major challenges that face third generation mobile systems [1, 2]. The present mobile radio systems organize the serviced area into cells [3, 4] Each cell is served by a Base Station (BS) which represents the interface to the fixed network. Mobile Stations (MS) are assigned to a cell according to their geographical position and communicate to the BS via a ....

D.J. Goodman, "Trends in cellular and cordless communications", IEEE Comm. Mag., vol. 29, pp. 31-40, Jun. 1991.

.... conditional mean (that is, MMSE) estimators are mentioned in the concluding chapter, as a recommendation for further work indeed, a number of promising results have already been obtained using such estimators, which unfortunately were unable to be included in the thesis (see chapter 7) Goodman [92] predicted that in third generation PCS PCN, subscribers . will use the same terminals indoors and outdoors, in suburban and rural areas, and in crowded cities. The wireless terminal will function well in a fixed position or moving at hundreds of kilometres per hour on a high speed train. More ....

.... a mobile radio channel will vary from just a few Hz or less, due (say) to trees blowing in the wind when the receiver is stationary [117] to up to several hundred, possibly even 500 Hz with carrier frequencies around 2 GHz and (say) a user located on a high speed train moving at hundreds of kmph [51, 92]. The LOS or specular signal Doppler frequency also takes on values over the entire range of the Doppler spread. Similarly, even with the (reasonable) assumption that coarse AGC in the receiver front end will accommodate the distance dependent variations of the received (diffuse) signal local ....

D.J. Goodman, "Trends in Cellular and Cordless Communications", IEEE Communications Magazine, vol. 28, pp. 31--40, June, 1991.

....from 15 c minute to 60 c minute. We now describe the general communication architecture for personal communications network (PCN) The assumed architecture in this paper, with the understanding that it is still far from being final, is based on the existing structure of cellular telephone networks [19]. The system configuration of a fixed cellular network consists of fixed information network extended with wireless network elements. These elements include, wireless terminals, base stations, and switches. The whole geographic area is partitioned into cells. Each cell is covered by a base ....

....A wants to establish the location of B; should A search the whole network or should A only look at pre defined locations Should B inform anybody about his or her moves One such method is described below. It corresponds to how location management is performed in the current cellular architectures[19]. It is also closely related to the way mobility is proposed to be handled over the Internet [15] Assume that each user is attached to a home location server that always knows his current address. When a user moves, he informs his home location server about his new address. To send a message ....

David J. Goodman, "Trends in Cellular and Cordless Communications," IEEE Communications Magazine, June 1991.

....system with base stations and switching software. We will assume the availability of a small portable low powered terminal with limited memory (say 8 16MB) which can be switched on and off by software (to minimize power consumption) of the network. The allocated bandwidth of radio spectrum[13] in North America includes frequencies between 870 890 kHz (from base station to mobile) and 825 845 kHz (from mobile to base) This bandwidth is subdivided into 666 channels which are shared and reused among base stations which are sufficiently far apart. Currently the average size of a cell is ....

....paging actions. Usually there is a limited number of paging channels and if all of them are busy we have to wait. This blocking effect has to be treated as part of the general problem of dynamic resource allocation in the cellular network some of these problems are currently being addressed in [13]. 6 Related Work Cellular technology is rapidly gaining public acceptance. Wireless computing and access to information in a wireless network will soon follow. The research work described in this paper is, to our knowledge, one of the few efforts that is addressing issues of information access ....

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David J. Goodman, "Trends in Cellular and Cordless Communications" IEEE Communications Magazine June 1991.

....areas) the placement of the base station became very difficult, yielding unacceptable quality of service in terms of voice quality and blocking rate. To meet the increasing demand, the increase in quality, and the enlarged range of applications, new second generation cellular systems are emerging [1]. In particular, this generation is characterized by digital speech transmission. Meanwhile, researchers are increasingly devoting attention to the third generation of wireless communication systems. These networks are expected to merge the first and second generation of cellular telephony, as ....

....services such as paging, dispatch, public safety, and wireless LAN. In particular, wireless terminals should be provided with BISDN capabilities. It is hoped that the third generation of systems will conform a worldwide standard instead of the current incompatible second generation systems [1]. Roughly speaking, the purpose of the wireless communication devices is to provide (wireless) access to the worldwide public switched telecommunication network (PSTN) To this aim, a scarce portion of the spectrum is allocated and the space is divided into cells, each of them having a (radio) ....

D. J. Goodman, "Trends in cellular and cordless communications," IEEE Communications Mag., pp. 31--40, June 1991.

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Goodman, "Trends in Cellular and Cordless Communications," IEEE Communications Magazine, Vol. 29, No. 6, pp. 31-40, Jun. 1991.

No context found.

D. J. Goodman, "Trends in cellular and cordless communications," IEEE Communications Magazine, vol. 29, no. 6, pp. 31--40, June 1991.

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D.J. Goodman, "Trends in Cellular and Cordless Communications", IEEE Commun. Mag., June 1991, pp. 31-40.

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D. J. Goodman, "Trends in cellular and cordless communications," IEEE Commun. Mag., pp. 31--40, June 1991.

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D. J. Goodman, "Trends in Cellular and Cordless Communications," IEEE Communication Magazine, June, 1991.

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D. Goodman, Trends in Cellular and Cordless Communications, IEEE Commun. Mag., Feb. 1991.

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D. Goodman, "Trends in Cellular and Cordless Communications", IEEE Commun. Mag., Feb. 1991.

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D.J. Goodman, "Trends in cellular and cordless communications, " IEEE Commun. Mag., vol. 29, pp. 31-40, Jun. 1991.

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Goodman, D. J., "Trends in Cellular and Cordless Communications," IEEE Communications Magazine, (June 1991), pp. 31-40.

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D.J.Goodman, "Trends in cellular and cordless communications," IEEE Comm. Mag., June 1991, pp.31-40.

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