The Universal Mobile Telecommunication System

Chia, S.T.S.

doi:10.1109/35.210356

Cited by 83 publications

(19 citation statements)

References 9 publications

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“…The requirements of green cellular network can be fulfilled with the known cellular architectures (macro, micro, pico cells) led to the conception of the idea of a hierarchical cell structure [3], [4]. The key issue for this type of cell architecture is to apply multiple cell layers to each service area, with the size of each layered cell tailored to match the required traffic demand and environmental constraints ( Fig.…”

Section: Effects Of Joint Macrocell / Microcell and Residential Picocmentioning

confidence: 99%

Hybrid Spectral Efficient Cellular Network Deployment to Reduce RF Pollution

Katiyar¹,

Jain²,

Agrawal³

2012

IJCA

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As the mobile telecommunication systems are growing tremendously all over the world, the numbers of handheld and base stations are also rapidly growing and it became very popular to see these base stations distributed everywhere in the neighborhood and on roof tops which has caused a considerable amount of panic to the public in Palestine concerning wither the radiated electromagnetic fields from these base stations may cause any health effect or hazard. Recently UP High Court in India ordered for removal of BTS towers from residential area, it has created panic among cellular communication network designers too. Green cellular networks could be a solution for the above problem. This paper deals with green cellular networks with the help of multi-layer overlaid hierarchical structure (macro / micro / pico / femto cells). Macrocell for area coverage, micro for pedestrian and a slow moving traffic while pico for indoor use and femto for individual high capacity users. This could be the answer of the problem of energy conservation and enhancement of spectral density also.

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Section: Effects Of Joint Macrocell / Microcell and Residential Picocmentioning

confidence: 99%

Hybrid Spectral Efficient Cellular Network Deployment to Reduce RF Pollution

Katiyar¹,

Jain²,

Agrawal³

2012

IJCA

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“…For example, there exist four different QoS classes for UMTS (i.e. conversational, streaming, interactive, background) [4], three classes for DiffServ [15] (i.e. default, expedited forwarding and assured forwarding), and three classes for IntServ [16] (i.e.…”

Section: Existing Qos Mechanisms In Imsmentioning

confidence: 99%

“…Among these services, real-time multimedia streaming and multimedia messaging can be listed as the most promising ones, which are currently enabled by the emerging 3rd Generation (3G) nob bile technologies such as High-speed Downlink Packet Access (HSDPA) [2], Evolution-Data Optimized (1xEV-DO) [3] and Universal Mobile Telecommunications System (UMTS) [4].…”

Section: Introductionmentioning

confidence: 99%

Enhancing End-to-End QoS for Multimedia Streaming in IMS-Based Networks

Özçelebi

Radovanović

Chaudron

2007

2007 Second International Conference on Systems and Networks Communications (ICSNC 2007)

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Ozcelebi, T.; Radovanovic, I.; Chaudron, M.R.V. Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

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“…For example, there exist four different QoS classes within UMTS framework (i.e. conversational, streaming, interactive, background) [10], while there are only two QoS classes for Differentiated Services [11] (i.e. expedited forwarding and assured forwarding).…”

Section: Existing Qos Signalling Mechanisms For Imsmentioning

confidence: 99%

Real-Time Resource Availability Signalling in IMS-Based Networks

Özçelebi

Radovanović

Lukkien

2007

2007 International Conference on Wireless Communications, Networking and Mobile Computing

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The emerging converged IP Multimedia Subsystem (IMS) allows the use of unlicensed, nondedicated and nondeterministic computer access networks for delivering IP multimedia services. To provide end-to-end Quality-of-Service (QoS) over such networks combined with the IMS core network, for resource demanding real-time services, such as live multimedia services, is a serious challenge. The main problem is the variation of resource availability, both in the network and end devices, during a single multimedia session. One solution to this problem is adaptation of content and quality of the media according to availability of resources in both the end devices and network. However, this solution requires accurate and timely signalling of resource availability between communicating parties during a multimedia session. In this paper, we suggest how signalling can be done using the Session Initiation Protocol (SIP) which is the call session control protocol for IMS. The real-time availability of the network resources (e.g. bandwidth, buffer space) and the end-device resources (e.g. battery, CPU, memory, storage) during a session is monitored and communicated over the network by the resource managers implemented in the enddevices. Our solution does not require any modifications of the IMS architecture and can be implemented as a plug-in.

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The Universal Mobile Telecommunication System

Cited by 83 publications

References 9 publications

Hybrid Spectral Efficient Cellular Network Deployment to Reduce RF Pollution

Hybrid Spectral Efficient Cellular Network Deployment to Reduce RF Pollution

Enhancing End-to-End QoS for Multimedia Streaming in IMS-Based Networks

Real-Time Resource Availability Signalling in IMS-Based Networks

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