The resources are managed by various components of a resource management sub system in a network multimedia system. The main goal of resource management is to supply guaranteed delivery of multimedia data. to try to to so three actions are used:
1) To order an allocate resources, during multimedia call establishment so traffic can flow in line with the QOS specification.
2) To provide resource according to the QOS specification.
3) To adopt to resources changes during on going multimedia data processing.
Resource management subsystem includes resource manager at the hosts similarly as at the network nodes. Resource management protocols are used to exchange information among the available resources.
1) Special purpose protocol approach:
It is also known as the internet paradigm. This approach is to design various special purpose protocols on top of internet protocol IP for different classes of application, for example TCP‟s special purpose protocol for reliable data communication where as UDP is for unreliable data communication and RTP is for audio and video transport.
2) General purpose protocol approach:
The general purpose protocol approach is to provide a set of service that the user can pick and use, for example: XTP where the user can select a way two way or three way handling for connection setup and release etc.
a more realistic and flexible approach may be to develop application tailored protocols that are customized for specific types of services, such as transferring voice, video, texts and image data.
1. Corresponding storage media:the storage media can be both computer integrated components and external devices in MNBMS.
2. It support descriptive query.
3. It must have device independent interface.
4. It also must support independent data format interface.
5. It must have view specific and simultaneous data access that is same multimedia data can be accessed even simultaneously through different queries by several applications.
6. It must be manage large amounts of data.
7. It must have relational consistency of data management.
8. It must support real time data transfer.
2) To provide resource according to the QOS specification.
3) To adopt to resources changes during on going multimedia data processing.
Resource management subsystem includes resource manager at the hosts similarly as at the network nodes. Resource management protocols are used to exchange information among the available resources.
Trends in collaborative computing:
Multimedia networked application such as tele- medicine, tele-working, virtual collaborative space, distributed simulation and tele actions are new application demands for collaborative computing.
Future collaborative computing will incorporate a number of people (possibly, unknown) at geographically distributed sites, using a variety of application from different application domains, with the heterogeneity, interoperability issues needs to be satisfied.Trends in transport subsystem:
The trends in transport system can be given in two topics.1) Special purpose protocol approach:
It is also known as the internet paradigm. This approach is to design various special purpose protocols on top of internet protocol IP for different classes of application, for example TCP‟s special purpose protocol for reliable data communication where as UDP is for unreliable data communication and RTP is for audio and video transport.
2) General purpose protocol approach:
The general purpose protocol approach is to provide a set of service that the user can pick and use, for example: XTP where the user can select a way two way or three way handling for connection setup and release etc.
a more realistic and flexible approach may be to develop application tailored protocols that are customized for specific types of services, such as transferring voice, video, texts and image data.
Multimedia database management systems (MDBMS):
Mdbms systems are database system, where besides text and other discrete data, audio and video information will also be stored, manipulated and retrieved. To support this functionality, MMDB (multimedia database) system requires a proper storage technology and a proper file system so that external devices can be accessed easily through up file directory. The measure characteristics of MDBMS can be given as below:1. Corresponding storage media:the storage media can be both computer integrated components and external devices in MNBMS.
2. It support descriptive query.
3. It must have device independent interface.
4. It also must support independent data format interface.
5. It must have view specific and simultaneous data access that is same multimedia data can be accessed even simultaneously through different queries by several applications.
6. It must be manage large amounts of data.
7. It must have relational consistency of data management.
8. It must support real time data transfer.
9. It should support the long time transactions i.e. the long time transaction must be reliable etc.