The TD-CDMA based UTRA TDD mode

Haardt, Martin; Klein, Axel; Koehn, R.; Oestreich, S.; Purat, M.; Sommer, V.; Ulrich, T.

doi:10.1109/49.864003

Cited by 142 publications

(49 citation statements)

References 12 publications

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“…Therefore, handoff in current UTRA-TDD standard usually means hard handoff [26]. To implement soft handoff in these networks, further research is necessary.…”

Section: Coordination In Soft Handoffmentioning

confidence: 99%

“…Obviously, the FDD systems are not very flexible to handle such asymmetry, and the system capacity is limited by the up, or downlink with a relatively larger load, resulting in a waste of the bandwidth. On the other hand, TDD has the ability to effectively handle asymmetry in the downlink and uplink, and is adopted in current third-generation standards, e.g., Universal Mobile Telecommunications System (UMTS) terrestrial radio access TDD (UTRA-TDD) [26], and time-division synchronous code-division multiple access (TD-SCDMA) [16].…”

Section: B Intercell Coordination In Tdd-cdmamentioning

confidence: 99%

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Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Jiang

Zhuang

Shen

et al. 2006

IEEE J. Select. Areas Commun.

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Abstract-One of the major challenges in supporting multimedia services over Internet protocol (IP)-based code-division multiple-access (CDMA) wireless networks is the quality-of-service (QoS) provisioning with efficient resource utilization. Compared with the circuit-switched voice service in the second-generation CDMA systems (i.e., IS-95), heterogeneous multimedia applications in future IP-based CDMA networks require more complex QoS provisioning and more sophisticated management of the scarce radio resources. This paper provides an overview of the CDMA-related QoS provisioning techniques in the avenues of packet scheduling, power allocation, and network coordination, summarizes state-of-the-art research results, and identifies further research issues.Index Terms-Code-division multiple-access (CDMA), intercell coordination, multimedia services, packet scheduling, power allocation, quality-of-service (QoS), soft handoff.

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“…Therefore, handoff in current UTRA-TDD standard usually means hard handoff [26]. To implement soft handoff in these networks, further research is necessary.…”

Section: Coordination In Soft Handoffmentioning

confidence: 99%

Section: B Intercell Coordination In Tdd-cdmamentioning

confidence: 99%

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Jiang

Zhuang

Shen

et al. 2006

IEEE J. Select. Areas Commun.

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“…Pure wideband CDMA uses frequency division duplex (FDD) to organize the uplink and downlink transmissions, while wideband TD-CDMA uses time division duplex (TDD). TDD mode is well-suited for indoor environments with high traffic density and applications with highly asymmetric traffic [13]. Wideband TD-CDMA mode resource units include both time slots in a frame and codes in a time slot due to slotted frame structure.…”

Section: Wcdma Mac Protocolsmentioning

confidence: 99%

A Survey On Mac Protocols For Wireless Multimedia Networks

Rao¹,

Chalam²,

Rao³

2011

IJCSES

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“…In the uplink however, the total interference slightly changes with fast channel fading due to the big number of transmitters. Moreover, the TDD mode is characterized by a channel reciprocity that can be used to perform open-loop power control algorithms [4]. The closed-loop power control algorithm is used after an initial phase that uses an open-loop power control algorithm [1].…”

Section: Introductionmentioning

confidence: 99%

Adaptive power control algorithm with stabilization zone for third generation mobile networks

Nasreddine¹,

Nuaymi²,

Lagrange³

2006

Ann. Telecommun.

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In this paper, we propose an evolution of adaptive power control algorithms for Universal Mobile Telecommunications System (UMTS). The proposed mechanism uses an adaptive power step to carry out with high fluctuations in the radio interface. Furthermore, we propose the integration of a stabilization zone where the transmitted power is kept constant to reduce oscillations around the target QoS level. In this algorithm, only the interpretation of power control feedback commands is ameliorated by adding some intelligence to mobiles and base stations. Moreover, the standardized radio interface protocol is used without modification. The algorithm can be used in both link directions of the Frequency Division Duplex (FDD) mode and in the downlink of the Time Division Duplex (TDD) mode, where closed-loop power control algorithms are used. Simulation results show that the proposed algorithm decreases the outage probability and reduces drastically the transmitted power, which are the main objectives of power control algorithms.

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The TD-CDMA based UTRA TDD mode

Cited by 142 publications

References 12 publications

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

A Survey On Mac Protocols For Wireless Multimedia Networks

Adaptive power control algorithm with stabilization zone for third generation mobile networks

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