Multimedia Communication Systems into Two Architectural
Subsystems APPLICATION SUBSYSTEMS TRANSPORT SUBSYSTEMS
1. APPLICATION SUBSYSTEMS
1.1. COLLABORATIVE COMPUTING
Know as Computer Supported Cooperative Work(CSCW) Provides Network Connectivity and End-Point Integration Collaborative Dimensions Partitioned into Three Dimensional space with 3 Parameters
1. TIME
2. USER SCALE
3. CONTROL
TIME Synchronous - Happen at same TimesAsynchronous - do not happen at same time
USER SCALE SINGLE USER MULTIPLE USER Static- Pre – determined members in group members does not changeDynamic- group members can join or leave the activity at any timeHomogeneous- same characteristicsHeterogeneous- different characteristics
CONTROL Centralized- main manager who controls the team and team reports to himDistributed- every group members has control over his/her own task
DIMENSION OF COLLABORATIVE COMPUTING
GROUP COMMUNICATION ARCHITECTURE Group communication architecture consists of Support Model System Model Interface Model
• GROUP RENDEZVOUS Group rendezvous denotes a method which allow one to organize meetings, get information about the group, ongoing meetings etc., groups are static, dynamic, synchronous, asynchronous
• SHARED APPLICATION Shared application denotes techniques which allow one to replicate information to multiple users simultaneously.
• SHARED APPLICATION Shared application denotes techniques which allow one to replicate information to multiple users simultaneously.
TWO TYPE ARCHITECTURE
1. CENTRALIZED ARCHITECTURE
1. CENTRALIZED ARCHITECTURE
2. REPLICATED ARCHITECTURE
Centralized Architecture
Centralized Architecture
A single copy of shared application runs at one site Replicated Architecture A copy of the shared application runs locally at each site
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• CONFERENCING
This service provides the management of multiple users for communicating with each other using multiple media.
Conferencing two types
1. CENTRALIZED CONFERENCE CONTROL
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• CONFERENCING
This service provides the management of multiple users for communicating with each other using multiple media.
Conferencing two types
1. CENTRALIZED CONFERENCE CONTROL
2. DISTRIBUTED CONFERENCE CONTROL
Centralized Conference Control
Establishment of conference by an initiator and initiator selects the group of conference members.ADVANTAGE- Guarantees consistency of conference state DISADVANTAGE- New participant want to enter causes large delay
Distributed Conference Control
The initiator of the conference establishes a multicast space, with multicast entries for distribution of information to the conference participants and conference is established
Centralized Conference Control
Establishment of conference by an initiator and initiator selects the group of conference members.ADVANTAGE- Guarantees consistency of conference state DISADVANTAGE- New participant want to enter causes large delay
Distributed Conference Control
The initiator of the conference establishes a multicast space, with multicast entries for distribution of information to the conference participants and conference is established
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