The 3GPP proposal for IMT-2000

Chaudhury, P.; Mohr, W.; Onoe, S.

doi:10.1109/35.809388

Cited by 150 publications

(48 citation statements)

References 6 publications

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“…In our investigations, we will consider the TC code ( ), proposed in [38], [39]. However, the more complex ( ) code [108] was proposed by UMTS to be employed in the 3G mobile communication systems [1], [72], [109]. The ( ) code is also interesting, since it is expected to provide further significant coding gains over that of the ( ) and ( ) code.…”

Section: Tablementioning

confidence: 99%

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Space-time codes and concatenated channel codes for wireless communications

Liew¹,

Hanzo²

2002

Proc. IEEE

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Section: Tablementioning

confidence: 99%

“…The third-generation (3G) mobile communications standards [1] are expected to provide a wide range of user services, spanning from voice to high-rate data services, supporting rates of at least 144 kb/s in vehicular, 384 kb/s in outdoor-to-indoor, and 2 Mb/s in indoor as well as picocellular applications [1].…”

Section: Introductionmentioning

confidence: 99%

Space-time codes and concatenated channel codes for wireless communications

Liew¹,

Hanzo²

2002

Proc. IEEE

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“…With the evolution of mobile communication, the types of services have been evolved from voice service to multimedia [1,2]. As a large number of bandwidths are required for multimedia services for wireless cellular networks, the most important issue is to support QoS for subscribers.…”

Section: Introductionmentioning

confidence: 99%

A Novel Call Admission Control Policy Using Mobility Prediction and Throttle Mechanism for Supporting QoS in Wireless Cellular Networks

Lee

Chang

et al. 2011

Journal of Control Science and Engineering

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The decision of call admission becomes an important work owing to the scarce wireless spectrum for wireless cellular networks. If there exists adequate information for call admission control (CAC) schemes, the terms of quality of service (QoS), such as call dropping probability (CDP), call blocking probability (CBP), and system utilization, will be kept in a certain acceptable level. Therefore, a prediction system which can predict most information, such as system utilization and CDP, in advance with a novel data mining technique and a distributed CAC scheme is presented in this paper. Based on the prediction results and the bandwidth consumption of adjacent cells, the proposed CAC scheme is able to decide to admit a new call. The throttle flag that can indicate the usage of current cell is proposed to prevent the newly admitted call request from being blocked in adjacent cells if handoff is needed. The simulation results show that the proposed CAC scheme can maintain the CDP below a predefined threshold, and the CBP is also lower than the cluster prediction and traditional guard channel policies.

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“…There are two main objectives when employing AQAM, namely counteracting the effects of time-variant channel quality fluctuations and the effects of the time-variant interference load imposed by the time-variant number of variable-rate users supported. 2 The various scenarios and channel conditions investigated were identical to those of the previous section except for the application of AQAM [15]. Since, in the previous section, an increased network capacity was achieved due to using independent UL and DL beamforming, this procedure was invoked in these simulations.…”

Section: Performance Of Adaptive Arrays and Adaptive Modulation Imentioning

confidence: 99%

Adaptive Beamforming and Adaptive Modulation-Assisted Network Performance of Multiuser Detection-Aided FDD and TDD CDMA Systems

Blogh

Hanzo

2007

IEEE Trans. Veh. Technol.

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Abstract-The network performance of a frequency division duplex and time division duplex (TDD) code division multiple access (CDMA)-based system is investigated using system parameters similar to those of the Universal Mobile Telecommunication System. The new call blocking and call dropping probabilities, the probability of low-quality access, and the required average transmit power are quantified both with and without adaptive antenna arrays (AAAs), as well as when subjected to shadow fading. In some of the scenarios investigated, the system's user capacity is doubled with the advent of adaptive antennas. The employment of adaptive modulation techniques in conjunction with AAAs resulted in further significant network capacity gains. This is particularly so in the context of TDD CDMA, where the system's capacity becomes poor without adaptive antennas and adaptive modulation owing to the high base station (BS) to BS interference inflicted as a consequence of potentially using all time slots in both the uplink and downlink of the emerging wireless Internet.Index Terms-Adaptive beamforming, adaptive modulation, code division multiple access (CDMA) systems, Universal Mobile Telecommunication System Terrestrial Radio Access (UTRA), wireless network performance.

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The 3GPP proposal for IMT-2000

Cited by 150 publications

References 6 publications

Space-time codes and concatenated channel codes for wireless communications

Space-time codes and concatenated channel codes for wireless communications

A Novel Call Admission Control Policy Using Mobility Prediction and Throttle Mechanism for Supporting QoS in Wireless Cellular Networks

Adaptive Beamforming and Adaptive Modulation-Assisted Network Performance of Multiuser Detection-Aided FDD and TDD CDMA Systems

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