M. Rahnema, "Overview of the GSM System and Protocol Architecture," IEEE Comm., Apr. 1993, pp. 92--100.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....payments on behalf of) parties not actually involved in the routing. A possible approach is to assume some degree of tamperproofness (as in [3] While it can be argued that [3] and other related approaches rely on a similar form of tamperproofness as is successfully provided by GSM SIM cards [20, 15], we mean that the latter provides portability of identity rather than security. This is because the SIM cards merely contain identifying information, and not accounting information, and an attacker cannot defraud others (whether other users or the operators) by modifying the functionality of ....

M. Rahnema, "Overview of the GSM system and protocol architecture," IEEE Communications Magazine, vol. 31, no. 4, April 1993, pp. 92--100.

....dedicated control channel) often referred as signaling channel . Of course there exist many other channels, which are also taken into account in our study, but these two and especially the SDCCH are the most important resources where the system relies in order to accommodate the users needs [1]. A new call cannot be initiated if SDCCH channels are not available and the same happens when SDCCHs are available but all TCHs are blocked. Thus we can say that blocking of these channels is a main performance indicator for an operational GSM network that may lead to severe bottlenecks if the ....

....say that blocking of these channels is a main performance indicator for an operational GSM network that may lead to severe bottlenecks if the phenomenon insists. Other performance indicators considered in this study are Throughput, Call Setup Success Rate (CSSR) and Handover Success Rate (HOSR) [1,2] Throughput is chosen in order to see the augmentation of the demand for services and channels in actual numbers, it is in other words an estimation of the congestion that may follow. Call Setup Success Rate and Handover Success Rate are chosen in order to appreciate the impact of ....

M. Rahnema, "Overview of the GSM System and Protocol Architecture", IEEE Communications Magazine, April 1993.

....for a rather low link speed; error losses, changing line rate and variable delays present additional challenges for an efficient data transport. The Global System for Mobile Communications (GSM) is a widely successful effort to build a W WAN system with millions of users in Europe and worldwide [20, 25]. GSM data, High Speed Circuit Switch Data (HSCSD) and General Packet Radio Service (GPRS) 4] are data transmission services offered by GSM. Many popular Internet applications including World Wide Web (WWW) File Transfer Protocol (FTP) and email require reliable data delivery over the network. ....

M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31(4):92--100, April 1993.

....error recovery and no variable delays on the link. Thus, different patterns of link errors is the only nondeterministic element in our environment. The Global System for Mobile Communication (GSM) is a widely successful effort to build a WWAN system with millions of users in Europe and worldwide [19, 24]. It maps well to our generic model shown in Figure 2. Mobile Fixed Host Host = Inte Wireless Last hop Link Router Figure 2: Network Architecture. 3 Problem Description In this section we outline the specific problems of TCP over wireless links we focus on in the rest of the thesis. ....

M. Rahnema. Overview of the GSM system and protocol architec- ture. IEEE Communications Magazine, 31:92-100, April 1993.

....is the only non deterministic element in our environment. We now discuss how existing wireless networks can be mapped to our generic model. The Global System for Mobile Communications (GSM) is a widely successful effort to build a WWAN system with millions of users in Europe and worldwide [MP92, Rah93] GSM data, High Speed Circuit Switch Data (HSCSD) Mobile Last hop Wireless Internet Host Link Router Fixed Host Figure 2: Network Architecture. Internet BTS BSC A MS BTS SGSN GGSN HOST Figure 3: GPRS Data Transmission Path. and General Packet Radio Service (GPRS) BW97] are ....

M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31(4):92--100, April 1993.

....for reliable transmission. GSM uses a combination of Forward Error Correction (FEC) data and retransmission of lost or damaged blocks to ensure data is transported reliability across a wireless link. Blocks are interleaved over a number of timeslots to further reduce the impact of block erasure [Rahnema93]. Because link layer protocols run beneath IPSEC, they have no effect on its operation. The link layer neither knows nor cares what data its frames are carrying, plaintext or ciphertext. Link layer reliability therefore does not have the same negative effects on end to end security as network or ....

M. Rahnema. Overview of the GSM System and Protocol Architecture. IEEE Commucation Magazine, 31(4) pp.92---100, April 1993.

....of GPRS strongly focused on the development of a service which would overcome these drawbacks of a wireless Internet access. GPRS is much better suited for data transfer intensive applications such as Web browsing, email, and database queries than the connection oriented GSM ( MoPa92] [Rahn93]) data service. The improvements are gained from the provision of a packet oriented data service for GSM, which, compared to the GSM data service, 1. allows reduced connection set up times and high transfer speeds, 2. provides an eOEcient usage of radio link resources, 3. supports within the ....

Rahnema, M., Overview of the GSM System and Protocol Architecture. IEEE Communication Magazine, 31(4), pp. 92-100, April 1993.

....very low transmission rates. Moreover the system utilization was extremely ine# cient (only one voice call in over 200 kHz) Rising demands for better services led to deployment of second generation standards. 1.2. 2 Second generation wireless system The second generation wireless systems [5, 6, 7] are characterized by digital airinterface technology. They also started to o#er data services along with voice and is presently the most widely deployed system. Table 1.1 provides a comparative study of the various 2G based systems currently in operation. The second generation 4 Network ....

M. Rahnema, "Overview of the GSM System and Protocol Architecture," IEEE Communications Magazine, vol. 31, pp. 92--100, Apr. 1993.

....and thus inspect the e ect of congestion and congestion based losses at a network node. allocation delay transmission delay propagation delay error delay INPUT QUEUE LSB LRB LINK Reassembly Fragmentation Figure 3: The channel model. Some link protocols (e.g. Radio Link Control (RLC) [23] in GSM) fragment PDUs of the upper protocol layer as a part of internal operation. The fragmentation unit before the link and the reassembly unit after the link allow to logically fragment the data packet into smaller pieces for the purpose of the di erent events performed during the emulations. ....

M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31:92-100, April 1993.

....cellular networks (3 to 4 times with their sample parameters) because of the smaller cell size and higher device density. Hierarchical mobility management schemes have been proposed to reduce signaling load in these connectionoriented networks. The Global System for Mobile Communications (GSM) [30] and IS 41 [12] cellular standards use Home Location Registers (HLR) and Visitor Location Registers (VLR) to implement mobile registration and tracking. Xie and Goodman [38] propose using a gateway VLR to limit mobility management traffic to the metropolitan area where a mobile currently resides. ....

M. Rahnema, Overview of the GSM system and protocol architecture, IEEE Commun. 31(4) (April 1993).

....of Wide Area Multi Link PPP (WAMP) for CDPD modems under both Constant Bit Rate (CBR) and TCP loads. 1 Introduction A large number of wide area wireless access network (WWAN) technologies have recently emerged, including Metricom s Ricochet Packet Radio network, Global System Mobile (GSM) [13], IS 95 [10] and Cellular Digital Packet Data (CDPD) 15] The defining characteristic of WWANs is their use of a shared channel with long and variable round trip times (RTTs) typically on the order of 500ms, coupled with a relatively low and variable bandwidth (usually in the tens of Kb s) ....

M. RAHNEMA. An Overview of the GSM System and Protocol Architecture. IEEE Communications Magazine: 31, April 1993.

....Each mobile entity is assigned both a network zone and a home which becomes permanently responsible for the mobile entity. This home database is in charge of keeping the current location of the mobile entity up to date and handles location requests. This approach has been used for example with GSM [20] and Mobile IP [16] The second approach is the tree structured hierarchical scheme. In this scheme, the network is subdivided into domains that are aggregated into larger, nonoverlapping domains. Each domain is represented by a node in the tree. The root node represents the entire network. This ....

M. Rahnema. "Overview of the GSM System and Protocol Architecture." IEEE Commun. Mag., 31(4):92--100, Apr. 1993.

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M. Rahnema, "Overview of the GSM System and Protocol Architecture," IEEE Comm., Apr. 1993, pp. 92--100.

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M. Rahnema, "Overview of the GSM System and Protocol Architecture," IEEE Comm., Apr. 1993, pp. 92--100.

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M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31(3):92--100, Apr 1993.

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M. Rahnema, "Overview of the GSM system and protocol architecture," IEEE Communications Magazine, Vol. 31, No. 4, pp. 92-100, April 1993.

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Rahnema M. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, vol. 31, pages 92-100, April 1993.

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M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31:92100, April 1993.

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M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31(4):92--100, April 1993.

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Rahnema, M., "Overview of the GSM system and protocol architecture," IEEE Communications Magazine, vol. 31, pp 92-100, April 1993.

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M. Rahnema. Overview of the GSM system and protocol architecture. IEEE Communications Magazine, 31:92100, April 1993.

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M. Rahnema, "Overview of the gsm system and protocol architecture," in IEEE Communications, vol. 31. April 1993.

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M. RAHNEMA, "An overview of the GSM system and protocol architecture," IEEE Communications Magazine, vol. 31, 1993.

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M. Rahnema, "Overview of the GSM Systems and Protocol Architecture," IEEE Communications Magazine, vol. 31, no. 4, April 1993, pp. 92-100.

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Rahnema, M., "Overview of the GSM system and protocol architecture," IEEE Communications Magazine, vol. 31, pp 92-100, April 1993.

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