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From "Ting Peng" <>
Subject Blue Sky Distance Collaboration System-Wish to add
Date Tue, 24 Jul 2007 07:11:09 GMT
Hello, everyone!

Now, we are going to move our project "Blue Sky Distance Collaboration
System" to Apache Incubator for future development. Its aim is to make
people under the sky to communicate and share resources with each other more
easily. When, the system is employed, users can communicated via
audio/video(computer screen also included) and text at the same time.  In
other words, Multi-Object Mutlimedia capable makes the system more vivid and
glamorous. Cosmic Resource Share & Management System is also included. It
provides unique portal for users to share resources(such as multi-object
multimedia courseware).

Project Overview and Proposal Draft is attached below.

For this is our first candidate project to Apache Foundation. We are
grateful for your ideas!

Waiting for your advice!

Best Regards!

Ting Peng(
>From Xi'an Jiaotong University & IBM Open Technology Joint Develop Center

BSDCS(Blue Sky Distance Collaboration System) Overview

The Purpose of this document is to give you an overview of the Blue Sky
Distance Collaboration System Project from the now application and the
future extent's perspective. It will review some of the principles and
motivations behind the project, major application components, and a brief
explanation of the system's technical organization.
The descriptions of functionality in this document are meant to give you a
high level overview of the system. For more detailed information you can
look over the Feature List and related documents.

Blue Sky Distance Collaboration System (BSDCS) is a suite of distance
collaboration applications built on open source. It includes three
interrelated parts. Distance Collaboration System can synchronously live
broadcast and share of presider scenes, and offer real-time interaction
between presider and participants by means of text and audio/video stream.
And these can be improved in Distance Learning, Video Conference and Remote
Assistant areas. BSDCS also offers two media players (for Linux and Windows,
separately) and a resource share & management platform to support users of
difference institutions to share resources. And the platform can also be
used to share and manage other resource. So we want to extend BSDCS to such
a system that fully breakthroughs time and space limitation, offers
personalized and vivid interaction, makes the resource update, share and
manage easy.

Video and audio is essential in collaboration. Therefore, the main part of
the system is Video Conference system. So BSDCS puts forward Distance
Collaboration System. It can synchronously live broadcast and share of
real-time scenes, and offer real-time interaction between presiders and
participants by means of text and audio/video stream. In order to support
users watching historical collaboration(such as courseware) and sharing
resources from other institutions, BSDCS offers two media players (for Linux
and Windows, separately) and an  resource share & management platform. So
BSDCS fully breakthroughs time and space limitation, changes the model from
the "conference" to "collabortion", offers personalized service and vivid
interaction, makes  resource sharing  easy.

Major Application Components

CWPlayer is a media player designed for users to watch historical
collaboration(such as history video conference,courseware, etc). It  can
play not only  the local resources, but also resources from remote server.
Using this tool, office staffers can review conference even it's already
ended, students can review course after-school, teachers can evaluate the
course, and teaching management departments will be able to appraise
CWPlayer has multi-language versions, Simplified Chinese version and
Traditional Chinese version, English version is scheduled to release later.
It can be used under Windows 98/2000/XP.

XPlayer is a media player that supports multi-object multimedia application
consists of local media or streaming media. It supports asf, rm, mov and
other current mainstream media. In one word, it's a universal media player
for GNU/Linux platform. The player has two components, stand-alone
application and browser plug-in.

Collaboration Recording Tool
The history collaboration record consists of multiple scenes, which consists
of participants' audio, video and screen data. With this tool, we can store
the collaboration scenes as a courseware for later access and download. In
this way, we can increase the efficiency of  resource production and resolve
the problem of updates synchronization of  resources in distance
collaboration, video conference and e-learning radically.

Distance Collaboration System
Based on GNU/Linux platform and open source technology, Distance
Collaboration  System uses IP Network as platform of transmission. It is a
real time collaboration system. The system can synchronously live broadcast
and share of presiders' scene, and offer real-time the interaction between
presider and students by means of text and audio/video stream. So it also
can be used in Video Conference, Remote Assistant and so on
This system includes four parts:
1. Collaboration Service Center: Collaboration Service Center is the core of
the whole  System, and has also only one instance in the system. Its main
function: responds the requests of login of presider Unit、Student Unit and
MCU,sends command, controls group discussion, monitors the status message of
Presider Unit and Student Unit. Besides, the center also can monitor the
interactive message between presider and participants.
2. Multipoint Control Unit (MCU): There are two main functions of MCU,
including interactive control over video/audio (achieved by MC) and
video/audio data processing (achieved by MP). Multimedia Interactive Control
is the main function of MC. MC receives the interactive control messages
from the collaboration Service Center. With these messages, it can control
the MP to process and transmit audio/video data. It monitors the topological
structure of the links with other components and media stream processing and
transmitting. It can set the MCUs's ID, subnet address, the Collaboration
Service Center's IP, services ports and QoS parameters. In Collaboration
System, MP can transmit data without processing. It's important to multicast
data between subnets. With the feedback of MC and current network status, MP
can support QoS control over audio/video data transmitting automatically.
3. Presider Unit: it can automatically identify whether the video device is
connected. If the video device is connected, it will capture data from media
device, and through real-time encoding, transmit to MCU in the same subnet.
If there is a focused Participant unit, it will collect video/audio data of
the focused student unit through MCU in the same subnet. Teacher unit can
switch video data captured between camera and DV. Multimedia data
transmission quality between Presider Unit and MCU is guaranteed by dynamic
adaptive QoS control mechanism. During Presider's presentation, all
operations on screen of the presider can be transmitted to every participant
units in real-time. Presider unit captures and encodes screen, and then,
transmits to MCU of the same subnet. Supporting with the cross-segment
transmission of MCU distributed in each subnet, presider unit can transmit
the screen information to participant units. Participant units decode it and
then can view presider's screen information. However, participant units
cannot operate the screen data. Presider unit can chat with all of student
units through text interaction. All of participant units can see the
interactive content.
4. Participant Unit: Participant unit can auto detect current equipment
capability (for example it can detect the computer has video and audio
device or not); when participant unit as a focus one, it can capture video
and audio, then  encode them in real time and transmit them to DTU which
locate on presider unit network; participant unit can get presider's and
focus participant's (if we have it) multimedia data from DTU which locate on
itself network; The video/audio transmit quality between participant unit
and DTU can ensure by dynamic adaptive Qos-controls. Focus participant can
control bandwidth by QoS-control and MPEG4 compress parameters. If the
system is not in interactive mode, participants can receive presider's
video/audio. But when the system is in interactive mode, focus participant
send his/her video and audio to DTU, non-focus participant can get the data
and presider's video and audio data. Real-time decode screen information and
locate play back. So each participant unit can reproduce the presider's

Resource Share & Management Platform
The Resource Share & Management Platform use distributed storage; system
inventory management strategy provides users with centralized retrieval
services. The main meaning of the project is to build the platform for
resource share & management on Linux, to provide users with transparent
service of resource access, standardized  resource description, unified
interface and flexible security control mechanism, to make an expandable
system, to support the dynamic accession of heterogeneous resource and to
achieve rapid retrieval and positioning.
Resource Management System consists of a number of resources sites. Each
resource site in the system is a node of Wide Area Network and they store
the physical resources. Resources can be visited and shared between the
nodes, and the information description of resource is released through the
regular register to center of service and management to register for
And the distributed storage of resources is provided by the system, has
effectively solved the problem of the storage of massive resources, while
improving the overall system reliability. Through the support from the
cluster of WASCE, it provides effectively supports for the needs of
large-scale users visit.
The center of service and management keep the latest resource index of the
system,to realize the visits and the sharing of resources system in
different  resource sites. The system simultaneously manages and updates the
resource index of different sites through maintaining an inventory system.
To provide users with a powerful portal so as to the user retrieve the
resource by the portal and to realize rapid inquiry in different resource
site, on the purpose of sharing resources. When the user needs to access a
resource, the catalog system provides a redirect function.

BSDCS Proposal(Blue Sky Distant Collaboration System,BSDCS)

This proposal outlines the creation of a new, top-level Blue Sky Distant
Collaboration Environment(BSDCS) within the Apache Software Foundation.

The Blue Sky  Distance Collaboration System Project is an open source cosmic
distance collaboration project. By open source distance collaboration
software we mean: Open Source Collaboration Player, Open Source
Collaboration Recording Tool, Open Source Distance Collaboration System,
Open Source Resources Sharing and Management Platform. And BSDCS can be
extended in such parts as Video Conference, E-Learning, Remote Assistant and
so on.

The maintainers of BSDCS interested in joining the Apache Software
Foundation for several reasons:
* The legal umbrella. There are no outstanding legal issues with BSDCS, but
the protection that Apache affords is valuable to the developers' peace of
mind as their project grows. It is a benefit for both contributors and
end-users to have a trusted entity involved with this aspect of the
* Resolve current potential licensing issues with copyright license
assignment and patent license grants that are addressed in the Apache
2.0license, but not in the MIT license. We had considered making this
independently earlier this year.
* Increase public awareness of BSDCS and of the application of Apache
licensing to business application level software. Lately the news is full of
companies that are using a dual-license (GPL and commercial) model for
enterprise software and BSDCS working with Apache opens an opportunity to
strengthen what we feel is a much higher value way of doing things for both
contributors and users.
* Help the project attract contributors and service providers to attract
clients who would feel more comfortable with the licensing coming through a
well known and established organization like Apache.


BSDCS has striven to foster a diverse community that is open to everyone. It
is released under a non-reciprocal license to encourage the maximum possible
adoption by all potential users and developers. The BSDCS community
encourages suggestions and contributions from any potential user and

BSDCS was originally created by Qinghua Zheng and Jun Liu in September 2005.
The BSDCS development is being done at XJTU-IBM Open Technology and
Application Joint Develop Center, more than 20 developers are involved. The
BSDCS community is a healthy meritocracy with plenty of developers.

BSDCS is both a set of flexible, extensible applications such as "Distance
Collaboration System", "Collaboration player", "Collaboration recording
tool", "Resources Sharing and Management Platform " and so on, designed by
engineers and educators with years of experience in the problem domain, as
well as a framework that makes it possible to create new applications that
exist with others.

Initial Source
BSDCS was developed by more than 20 developers at XJTU-IBM Open Technology
and Application Joint Develop Center.

Resources to be Created
User, Dev, and Announce mailing lists. Copy current subversion code, and
create a commits mailing list. Create Wiki.
Avoiding the Warning Signs

Orphaned products:
The initial committers have a long-term interest in use and maintenance of
the code.

Inexperience with Open Source:
The developers use a number of other open source projects within BSDCS, and
are interested in how best to make open source work with their project,

A Fascination with the Apache Brand:
The developers of BSDCS have been quite successful on their own and could
continue on that path with no problems at all. They are interested in
joining the ASF in order to increase their contacts and visibility in the
open source world.
* Qinghua Zheng
* Jun Liu
* Shan Jiang
* Bo Dong
* Yang Wu
* Ting Peng
* Wei Dong
* Liyuan Dong
* Weimei Lv
* Jie Lin
* Jingjing Gao
* Fan Zhang
* Dong Yang

Proposed Apache Sponsor

Incubator PMC

* <Add later>

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