Towards IPTV service discovery and selection in an IMS environment
- Authors: Tsietsi, Mosiuoa , Musvibe, Ray , Terzoli, Alfredo , Wells, George C
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430795 , vital:72716 , 10.1109/ICUMT.2010.5676637
- Description: The IP Multimedia Subsystem (IMS) is a telecommunication middleware architecture that behaves as a docking station for a wide range of mul-timedia services. Several so-called killer applications have been envi-sioned for this platform such as multimedia group communications and location based services (LBS), but one of the most common business cases for IMS remains IPTV (Internet Protocol TV). Several IMS stand-ards development bodies and non-IMS players have contributed knowledge to the topic of IPTV, and the mechanisms needed to support various IPTV services are well understood. In addition, there are exam-ples of researchers who have implemented IPTV services in their net-work testbeds. However, many of them do not make use of the full power of the specifications which describe the mechanisms of service discovery and service selection. These processes define support for customer device configuration, service personalisation and service se-lection in a multi-service provider ecosystem. This position paper pro-poses solutions to some of the open questions in this area and pro-vides an architecture for a testbed that properly supports service dis-covery and selection. An initial implementation addressing the topic of auto-configuration of IMS terminals for service discovery is also pre-sented.
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- Date Issued: 2010
Using an RTSP Proxy to implement the IPTV Media Function via a streaming server
- Authors: Shibeshi, Zelalem S , Terzoli, Alfredo , Bradshaw, Karen L
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429120 , vital:72561 , https://ieeexplore.ieee.org/abstract/document/5676629
- Description: Multimedia in IMS, including IPTV, is handled by a separate unit, the Media Function (MF), which is made up of Media Control and Media Delivery Functions (MCF and MDF). According to the different specifications of an IMS based IPTV architecture, the User Equipment (UE) is expected to use the RTSP protocol as a media control protocol to interact with the MCF, and gets delivery of media from the MDF using the RTP protocol. This generally means that the streaming session is initiated from the media controller on behalf of the user but the delivery of media is sent to the UE from the media deliverer (media server). Due to lack of free and open source Media Servers and on the contrary, the availability of free and open source Streaming Servers, the ideal choice for the delivery of media in multimedia services, including IPTV, by the research community are Streaming Servers. Nevertheless, because of denial of service attack and other issues, most streaming servers do not allow different locations for the session setup request and the delivery of media of the streaming session. This makes it difficult to have a separate media control unit for IPTV service in IMS, if one wants to use a streaming server as an MDF unit. For this purpose we propose another component (an RTSP proxy and relay unit) to be part of the IPTV Media Function (MF). The unit will be used to mediate between the MFC and MDF and will properly relay media control (RTSP) commands from the UE and MFC to the MDF and RTP packets from the MDF to the UE. This, we believe, will facilitate the development of an IPTV service using readily available open source streaming servers. In this paper we show how this RTSP proxy and relay unit can be integrated into the Media Function of the IPTV architecture to ease the media delivery process of IMS based IPTV service.
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- Date Issued: 2010
Using JAIN SLEE as an interaction and policy manager for enabler-based services in next generation networks
- Authors: Tsietsi, Mosiuoa , Terzoli, Alfredo , Wells, George C
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/431382 , vital:72770 , https://journals.pan.pl/dlibra/publication/100205/edition/86373/content
- Description: The IP Multimedia Subsystem is a telecommunications framework with a standard architecture for the provision of services. While the services themselves have not been standardised, standards do exist for basic technologies that can be re-used and aggregated in order to construct more complex services. These elements are called service capabilities by the 3GPP and service enablers by the OMA, both of which are repu-table standards bodies in this area. In order to provide re-usability, there is a need to manage access to the service capabilities. Also, in order to build complex services, there is a further need to be able to manage and coordinate the interactions that occur between service capabilities. The 3GPP and the OMA have separately defined network entities that are responsible for handling aspects of these requirements, and are known as a service capability interaction manager (SCIM) and a policy enforcer respectively. However, the internal structure of the SCIM and the policy enforcer have not been standardised by the relevant bodies. In addition, as the SCIM and the policy enforcer have been defined through complementary yet separate processes, there is an opportunity to unify efforts from both bodies. This paper builds on work and stand-ards defined by the bodies, and proposes the design of an interaction manager with features borrowed from both the SCIM and the policy en-forcer. To help validate the design, we have identified a platform known as JAIN SLEE which we believe conforms to the model proposed, and we discuss how JAIN SLEE can be used to implement our ideas.
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- Date Issued: 2010
Validation of growth zone deposition in otoliths of two large endemic cyprinids in Lake Gariep, South Africa
- Authors: Winker, A Henning , Ellender, Bruce R , Weyl, Olaf L F , Booth, Anthony J
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/446812 , vital:74562 , https://doi.org/10.1080/15627020.2010.11657263
- Description: We tested the hypothesis that growth zones in the astericus otoliths of smallmouth yellowfish (Labeobarbus aeneus) and Orange River mudfish (Labeo capensis) were deposited annually. Two methods, fluorochrome marking and edge analysis of otoliths were used. For fluorochrome marking, specimens of both species were injected with 60 mg/kg fish mass oxytetracycline hydrochloride (OTC) and released into large earthen ponds under ambient conditions adjacent to Lake Gariep. Twenty-three L. aeneus and one L. capensis were recaptured 10–14 months later. Edge analysis was based on the optical interpretation of L. aeneus (n = 342) and L. capensis (n = 512) otolith margins collected between November 2006 and May 2008 from Lake Gariep. The frequency distribution of opaque margins over time was fitted using a binomial periodic regression. The estimated cycle length was not significantly different from a hypothesized 12 months for both species. The number of growth zones distal to the OTC mark was consistent with findings from the edge analysis, providing evidence that growth zones in astericus otoliths of both species can be interpreted as annuli.
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- Date Issued: 2010
Academic Practices and Reasoning: APR 122
- Authors: Scott, R , Blatchford, M
- Date: 2010-01
- Language: English
- Type: Examination paper
- Identifier: vital:18236 , http://hdl.handle.net/10353/d1011228
- Description: Academic Practices and Reasoning: APR 122, Jan/Feb supplementary examination 2010.
- Full Text: false
- Date Issued: 2010-01
Computer Graphics: CSC 521
- Authors: Chadwick, J , Vogts, D
- Date: 2010-01
- Language: English
- Type: Examination paper
- Identifier: vital:17755 , http://hdl.handle.net/10353/d1010264
- Description: Computer Graphics: CSC 521, Aegrotat examinations January 2010.
- Full Text: false
- Date Issued: 2010-01
Inorganic Chemistry: CHE 502
- Authors: Ajibade, P A , Purcell, W
- Date: 2010-01
- Subjects: Chemistry, Inorganic
- Language: English
- Type: Examination paper
- Identifier: vital:17808 , http://hdl.handle.net/10353/d1010360
- Description: Inorganic Chemistry: CHE 502, Aegrotat examination January 2010.
- Full Text: false
- Date Issued: 2010-01
Measure and Integration Theory (Mathematics Honours): MAT 508
- Authors: Makamba, B B , Murali, V
- Date: 2010-01
- Language: English
- Type: Examination paper
- Identifier: vital:17594 , http://hdl.handle.net/10353/d1009968
- Description: Measure and Integration Theory (Mathematics Honours): MAT 508, degree examination January 2010.
- Full Text: false
- Date Issued: 2010-01
Physical Chemistry 3: PAC 324
- Authors: Sadimenko, A , Purcell, W
- Date: 2010-01
- Language: English
- Type: Examination paper
- Identifier: vital:17810 , http://hdl.handle.net/10353/d1010362
- Description: Physical Chemistry 3: PAC 324, supplementary examination January 2010.
- Full Text: false
- Date Issued: 2010-01
Technology for Educators: EDT 221
- Authors: Vye, Z , Tyilo, P N
- Date: 2010-01
- Subjects: Education
- Language: English
- Type: Examination paper
- Identifier: vital:17293 , http://hdl.handle.net/10353/d1010116
- Description: Supplementary examination on Technology for Educators: EDT 221, January 2010.
- Full Text: false
- Date Issued: 2010-01
Academic Practices and Reasoning: APR 122
- Authors: Scott, R , Blatchford, M
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:18273 , http://hdl.handle.net/10353/d1011269
- Description: Academic Practices and Reasoning: APR 122, examination November 2009.
- Full Text: false
- Date Issued: 2009-11
Advanced Business Management: BEC 503
- Authors: Jordaan, B.D , Roberts-Lombard, M
- Date: 2009-11
- Subjects: Advanced Business Management
- Language: English
- Type: Examination paper
- Identifier: vital:17452 , http://hdl.handle.net/10353/d1010266
- Description: Advanced Business Management: BEC 503, November 2009.
- Full Text: false
- Date Issued: 2009-11
Advanced Criminal Law: LCP 422 & 422E
- Authors: Maseti, Z M , Anderson, A
- Date: 2009-11
- Subjects: Criminal law
- Language: English
- Type: Examination paper
- Identifier: vital:17388 , http://hdl.handle.net/10353/d1009856
- Description: Advanced Criminal Law: LCP 422 & 422E,November Examination Paper 2009
- Full Text: false
- Date Issued: 2009-11
Advanced Financial Management: BEC 504
- Authors: Fatoki, O O , Tait, M
- Date: 2009-11
- Subjects: Advanced Financial Management
- Language: English
- Type: Examination paper
- Identifier: vital:17453 , http://hdl.handle.net/10353/d1010267
- Description: Advanced Financial Management: BEC 504, November 2009.
- Full Text: false
- Date Issued: 2009-11
Applied Agricultural Biometry: AGB 321
- Authors: Odeyemi, A , Tyler, J
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:11974 , http://hdl.handle.net/10353/d1010338
- Description: Applied Agricultural Biometry: AGB 321, degree examination November 2009.
- Full Text: false
- Date Issued: 2009-11
Data Structures & Algorithms: CSC 223
- Authors: Chadwick, J , Sibanda, K
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:17774 , http://hdl.handle.net/10353/d1010314
- Description: Data Structures & Algorithms: CSC 223, Supplementary examinations November 2009.
- Full Text: false
- Date Issued: 2009-11
Elementary Computer programming: CSC 121
- Authors: Chadwick, J , Ntuli, S
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:17772 , http://hdl.handle.net/10353/d1010312
- Description: Elementary Computer Programming: CSC 121, degree examination November 2009.
- Full Text: false
- Date Issued: 2009-11
Introduction to Networks: CSC 323
Law of Contract B: LPC 222E
- Authors: Maree, D A , Zondeki, T
- Date: 2009-11
- Subjects: Contracts -- Law and legislation
- Language: English
- Type: Examination paper
- Identifier: vital:17392 , http://hdl.handle.net/10353/d1009863
- Description: Law of Contract B: LPC 222E, November Examination Paper 2009
- Full Text: false
- Date Issued: 2009-11