Applying ATM to mobile infrastructure networks

Nakamura, Hiromitsu; Tsuboya, Hisakazu; Nakano, Miyoko; Nakajima, A.

doi:10.1109/35.649329

Cited by 22 publications

(11 citation statements)

References 4 publications

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“…Alternative ATM or IP based solutions to this problem can also be discussed, see e.g. [16]. One important fact is, however, that the 16 kbps limit will be exceeded already by the introduction of two coding schemes (CS3 and CS4) in GPRS, which have a maximal bit rate per traffic channel of 22.8 kbps.…”

Section: Effects On the Gsm System Architecturementioning

confidence: 99%

EDGE: enhanced data rates for GSM and TDMA/136 evolution

et al. 1999

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Two of the major second generation standards, GSM and TDMA/136 1 , have built the foundation to offer a common global radio access for data services. Through use of a common physical layer, EDGE (Enhanced Data rates for GSM and TDMA/136 Evolution), both standards will have the same evolutionary path towards providing third-generation services.EDGE is currently subject to standardization in TIA TR45.3 and ETSI SMG, a process which will be finalized in the end of 1999. Compared to the existing data services in GSM and TDMA/136, EDGE will provide significantly higher user bit rates and spectral efficiency. EDGE can be introduced in these systems in a smooth way, using existing frequency plans of already deployed networks. This paper gives the rationale behind the development of the EDGE concept, presents the EDGE technology and addresses performance by means of system simulations.1. TDMA/136 is also known as D-AMPS and IS-136.

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Section: Effects On the Gsm System Architecturementioning

confidence: 99%

EDGE: enhanced data rates for GSM and TDMA/136 evolution

et al. 1999

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“…In fact, despite the advent of the Internet, the increasing demand for distributed multimedia services in the last few years has favoured the use of ATM as a basic technology in broadband networks. ATM will be gradually introduced into mobile systems and it will eventually replace the STM-based technology of traditional transit networks where PCM coding is widely used today [14][15]. In this scenario, therefore, although transcoding between VBR and PCM in all radio parts of the core network will be required as long as the traditional way of implementing voice services through 64 kbit/s PCM encoded signals transported by timeslot-based networks is dominant, this cost is going to be broken down in the long term, as penetration of ATM increases.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, even in the short term, transcoding can effectively be bypassed in specific domains like wireless ATM networks or user access environments with a huge presence of localized traffic [15]. As the above scenario can be realistically foreseen in the near future, it is crucial to analyze the impact of multimode VBR speech coding on the quality of service provided by a wireless/wired ATM network.…”

Section: Introductionmentioning

confidence: 99%

“…According to the selected coding mode, therefore, each speech source emits a variable number of packets every 10 ms, as indicated in the VR-CELP specification [13]; in our scenario, we chose a fixed 8-bits packet length so that the maximum packetization delay is 20 ms, even in the case of the lowest bit rate. We also assume that, in order to exploit the output ATM link capacity, in the base station a number of packets carrying voice signals of different calls for the same destination is multiplexed to be conveyed in the same ATM cell payload [15][16].…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis of an ATM multiplexer loaded with VBR traffic generated by multimode speech coders

Beritelli

Lombardo

Palazzo

et al. 1999

IEEE J. Select. Areas Commun.

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Multimode coders are able to exploit the different characteristics of the speech waveform and to take into account the different peculiarities of background noise, thus allowing improvements in both signal reconstruction and network offered load. In this context the Variable Rate CELP (VR-CELP) coding, that is, a multimode VBR coding based on the Code Excited Linear Prediction technique, has been introduced in literature and is currently being considered for use in various applications, especially in the third generation UMTS cellular systems. The target of the paper is to introduce an efficient and accurate framework allowing a network designer to analyze the impact of multimode VBR speech coding on the quality of service provided by a wireless/wired ATM network. In order to capture the coder output characteristics, we propose to model a VR-CELP voice source by using a switched batch Bernoulli process (SBBP). More specifically, three models are introduced and compared in terms of accuracy and simplicity in determining network performance. As a result of the comparison, a four-state model has been chosen as the best trade-off. The model is then used to analytically derive the loss probability and the jitter probability density function of an ATM multiplexer loaded by a number of VR-CELP sources. Finally, the proposed paradigm has been assessed in a case study where we demonstrate that, for a given output ATM link capacity and for a number of telecommunication services involving voice transmission, VR-CELP coding performs better than traditional ON-OFF coding.

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“…Recently, the performance of AAL2 has been evaluated using computer simulation [4], [5] and simple experiments [6]. The AAL2 protocol parameters have been roughly analyzed [ 2 ] , [3], and the effectiveness of bit dropping has been analyzed [7], [18].…”

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confidence: 99%

Bandwidth management for AAL2 in UBR VCs

Saitō

IEEE ATM Workshop '99 Proceedings (Cat. No. 99TH8462)

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Applying ATM to mobile infrastructure networks

Cited by 22 publications

References 4 publications

EDGE: enhanced data rates for GSM and TDMA/136 evolution

EDGE: enhanced data rates for GSM and TDMA/136 evolution

Performance analysis of an ATM multiplexer loaded with VBR traffic generated by multimode speech coders

Bandwidth management for AAL2 in UBR VCs

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