IMT-2000 standards: network aspects

Pandya, Raj; Grillo, D.; Lycksell, E.; Mieybegue, P.; Okinaka, Hideo; Yabusaki, M.

doi:10.1109/98.612274

Cited by 76 publications

(25 citation statements)

References 2 publications

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“…is the probability that an incoming call arrives when the MT is in state for a given number of states . It is computed by (18) where is the steady-state probability as in (7) and is the mean residence time in state that is obtained as (19) In this expression, is the number of cells included in ring and is the Laplace transform of the cell residence time in (11).…”

Section: Macrocell-to-microcell Tier Roaming Probabilitymentioning

confidence: 99%

“…UTURE wireless networks are envisioned as seamless worldwide radio systems, including diverse network backbones ranging from high-capacity picocell networks to terrestrial micro and macro networks as well as large satellite systems [1], [8], [19]. The increasing demands for heterogeneous services necessitate high-quality location management that allows the personal communication service (PCS) networks to locate mobile users roaming across different systems.…”

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confidence: 99%

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A dynamic location management scheme for next-generation multitier PCS systems

Akyildiz

Wang

2002

IEEE Trans. Wireless Commun.

219

100

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Abstract-Global wireless networks enable mobile users to communicate regardless of their locations. One of the most important issues is location management in a highly dynamic environment because mobile users may roam between different wireless systems, network operators, and geographical regions. In this paper, a location-tracking mechanism is introduced that consists of intersystem location updates and intersystem paging. Intersystem update is implemented by using the concept of boundary location area, which is determined by a dynamic location update policy in which the velocity and the quality of service are taken into account on a per-user basis. Also, intersystem paging is based on the concept of boundary location register, which is used to maintain the records of mobile users crossing the boundary of systems. This mechanism not only reduces location-tracking costs, but also significantly decreases call-loss rates and average-paging delays. The performance evaluation of the proposed schemes is provided to demonstrate their effectiveness in multitier personal communication systems.

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Section: Macrocell-to-microcell Tier Roaming Probabilitymentioning

confidence: 99%

mentioning

confidence: 99%

A dynamic location management scheme for next-generation multitier PCS systems

Akyildiz

Wang

2002

IEEE Trans. Wireless Commun.

219

100

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“…Given the success of digital cellular networks, it is inevitable that future wireless services will support Internet Protocol (IP)-based multimedia applications [1], [2]. Typical applications include mobile internet access, mobile videoconferencing, streaming video/audio, distance learning, e-commerce, entertainment, etc.…”

Section: Introductionmentioning

confidence: 99%

An improved UDP protocol for video transmission over Internet-to-wireless networks

Zheng¹,

Boyce²

2001

IEEE Trans. Multimedia

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Packet video will become a significant portion of emerging and future wireless/Internet traffic. However, network congestion and wireless channel error yields tremendous packet loss and degraded video quality. In this paper, we propose a new complete user datagram protocol (CUDP), which utilizes channel error information obtained from the physical and link layers to assist error recovery at the packet level. We propose several maximal distance separable (MDS) code-based packet level error control coding schemes and derive analytical formulas to estimate the equivalent video frame loss for different versions of user datagram protocol (UDP). We validate the proposed packet coding and CUDP protocol using MPEG-coded video under various Internet packet loss and wireless channel profiles. Theoretic and simulation results show that the video quality can be substantially improved by utilizing the frame error information at UDP and application layer.

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“…UMTS is based on the WCDMA (Wideband Code Division Multiple Access) air interface, providing simultaneous support for a wide range of services with different characteristics on a common 5 MHz carrier. The 3rd Generation Partnership Project (3GPP) standardization committee has also released a specification on MAC protocol [3,29,30]. In this specification, the MAC architecture, channel structures, services, and MAC functions are defined.…”

Section: Introductionmentioning

confidence: 99%