Service Mechanism Quality for Enhanced Mobile Multimedia Database Query Processing

2005 ◽  
pp. 619-623
Author(s):  
Yanpu Zhang ◽  
Zhengxin Chen
Keyword(s):  
Quality Of Service ◽  
Query Processing ◽  
Multimedia Databases ◽  
Multimedia Data ◽  
Multimedia Database ◽  
Mobile Multimedia ◽  
Object Relational ◽  
Novel Concept ◽  
Wireless Mobile

Among the challenges of multimedia and mobile computing, providing a mechanism for data retrieval in multimedia databases under wireless mobile environments is one of the most difficult issues (Shih, 2001). Up to now, the fundamental technologies that are specialized for wireless mobile, multimedia environments are not mature in object-oriented, object-relational, as well as relational databases (Hillborg, 2002; Ramakrishnan & Gehrke, 2003; Watson, 2004). An important issue is how to ensure quick query response for the users. If a user found out that the retrieved multimedia object is neither interesting nor useful after it is displayed, then the time and bandwidth used for transmitting the multimedia objects have already been wasted. In order to save precious time and expensive bandwidth, it could be a good idea to let users browse objects at an acceptable resolution without paying much attention to the details or at the limited device display capability. This article presents a novel concept to deal with this problem by making use the concept of quality of service (QoS) to achieve adaptive query processing. In general, traditional QoS management is defined as the necessary supervision and control to ensure that the desired quality of service properties are attained and sustained, which applies both to continuous media interactions and to discrete interactions (Chalmers & Sloman, 1999). QoS thus consists of a set of specific requirements for a particular service provided by a network to users. However, little work has been done in extending QoS principles to multimedia data management in wireless network environments.

Multimedia Databases and Data Management

2012 ◽  
pp. 1-11
Author(s):  
Shu-Ching Chen
Keyword(s):  
Data Management ◽  
Relevant Information ◽  
Multimedia Databases ◽  
Multimedia Data ◽  
Formal Structure ◽  
Multimedia Database ◽  
Storage Devices ◽  
Temporal Relationships ◽  
Spatio Temporal ◽  
Application Requirements

The exponential growth of the technological advancements has resulted in high-resolution devices, such as digital cameras, scanners, monitors, and printers, which enable the capturing and displaying of multimedia data in high-density storage devices. Furthermore, more and more applications need to live with multimedia data. However, the gap between the characteristics of various media types and the application requirements has created the need to develop advanced techniques for multimedia data management and the extraction of relevant information from multimedia databases. Though many research efforts have been devoted to the areas of multimedia databases and data management, it is still far from maturity. The purpose of this article is to discuss how the existing techniques, methodologies, and tools addressed relevant issues and challenges to enable a better understanding in multimedia databases and data management. The focuses include: (1) how to develop a formal structure that can be used to capture the distinguishing content of the media data in a multimedia database (MMDB) and to form an abstract space for the data to be queried; (2) how to develop advanced content analysis and retrieval techniques that can be used to bridge the gaps between the semantic meaning and low-level media characteristics to improve multimedia information retrieval; and (3) how to develop query mechanisms that can handle complex spatial, temporal, and/or spatio-temporal relationships of multimedia data to answer the imprecise and incomplete queries issued to an MMDB.

Research Challenges in Multimedia WiMAX

2011 ◽  
pp. 36-50
Author(s):  
Julio Aráuz
Keyword(s):  
Quality Of Service ◽  
Current Literature ◽  
Wireless Systems ◽  
Ieee 802.16 ◽  
Multimedia Data ◽  
Mobile Technologies ◽  
Mathematical Background ◽  
Research Areas ◽  
Research Challenges

On the stage of today’s communications world, broadband mobile technologies are a continuously flourishing trend. In this context, WiMAX, a technology based on the IEEE 802.16 standards, currently plays a noteworthy role. Throughout the chapter we survey current literature related to the delivery of multimedia data in WiMAX systems and, most importantly, identify research areas in which promising improvement opportunities exist. We start by portraying how both market and technical conditions have encouraged the adoption of WiMAX, and then, by building upon a fundamentals introduction, we focus on issues related to capacity and frame assembly. We also identify relevant aspects related to scheduling and mapping between user applications and WiMAX services. We close the chapter with a discussion on quality of service in wireless systems and visit the mathematical background of opportunistic scheduling for WiMAX.

Quality of Service Architectures

2008 ◽  
pp. 425-431
Author(s):  
Christos Bouras ◽  
Apostolos Gkamas ◽  
Dimitris Primpas ◽  
Kostas Stamos
Keyword(s):  
Quality Of Service ◽  
Ip Networks ◽  
Multimedia Data ◽  
Network Resource ◽  
Internet Applications ◽  
Service Guarantees ◽  
Data Flows ◽  
Almost All ◽  
Speed And Accuracy

IP networks are built around the idea of best effort networking, which makes no guarantees regarding the delivery, speed, and accuracy of the transmitted data. While this model is suitable for a large number of applications, and works well for almost all applications when the network load is low (and therefore there is no congestion), there are two main factors that lead to the need for an additional capability of quality of service guarantees. One is the fact that an increasing number of Internet applications are related to real-time and other multimedia data, which have greater service requirements in order to be satisfying to the user. The other is that Internet usage is steadily increasing, and although the network infrastructure is also updated often, it is not always certain that network resource offerings will be ahead of usage demand. In order to deal with this situation, IETF has developed two architectures in order to enable QoS-based handling of data flows in IP networks. This article describes and compares these two architectures.

Multimedia Databases and Data Management

2010 ◽  
Vol 1 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Shu-Ching Chen
Keyword(s):  
Data Management ◽  
Relevant Information ◽  
Multimedia Databases ◽  
Multimedia Data ◽  
Formal Structure ◽  
Multimedia Database ◽  
Storage Devices ◽  
The Media ◽  
Spatio Temporal ◽  
Application Requirements

The exponential growth of the technological advancements has resulted in high-resolution devices, such as digital cameras, scanners, monitors, and printers, which enable the capturing and displaying of multimedia data in high-density storage devices. Furthermore, more and more applications need to live with multimedia data. However, the gap between the characteristics of various media types and the application requirements has created the need to develop advanced techniques for multimedia data management and the extraction of relevant information from multimedia databases. Though many research efforts have been devoted to the areas of multimedia databases and data management, it is still far from maturity. The purpose of this article is to discuss how the existing techniques, methodologies, and tools addressed relevant issues and challenges to enable a better understanding in multimedia databases and data management. The focuses include: (1) how to develop a formal structure that can be used to capture the distinguishing content of the media data in a multimedia database (MMDB) and to form an abstract space for the data to be queried; (2) how to develop advanced content analysis and retrieval techniques that can be used to bridge the gaps between the semantic meaning and low-level media characteristics to improve multimedia information retrieval; and (3) how to develop query mechanisms that can handle complex spatial, temporal, and/or spatio-temporal relationships of multimedia data to answer the imprecise and incomplete queries issued to an MMDB.

Multicast of Multimedia Data

2008 ◽  
pp. 1781-1788
Author(s):  
Christos Bouras ◽  
Apostolos Gkamas ◽  
Dimitris Primpas ◽  
Kostas Stamos
Keyword(s):  
Quality Of Service ◽  
Real Time ◽  
Heterogeneous Network ◽  
Multimedia Data ◽  
The Other ◽  
The Internet ◽  
Service Guarantees ◽  
Tcp Friendly ◽  
Real Time Applications

The heterogeneous network environment that Internet provides to real time applications as well as the lack of sufficient QoS (Quality of Service) guarantees, many times forces applications to embody adaptation schemes in order to work efficiently. In addition, any application that transmits data over the Internet should have a friendly behaviour towards the other flows that coexist in today’s Internet and especially towards the TCP flows that comprise the majority of flows. We define as TCP friendly flow, a flow that consumes no more bandwidth than a TCP connection, which is traversing the same path with that flow (Pandhye 1999).

Sign in / Sign up

Export Citation Format

Share Document