ASCII Text of SBP-2 Project Proposal

PJohansson at aol.com PJohansson at aol.com
Wed Oct 16 12:16:18 PDT 1996


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                      Project Proposal
                        For a New
                       X3 Standard
                  Serial Bus Protocol 2
                        (SBP-2)

                    November 7, 1996

1. IDENTIFICATION OF PROPOSED PROJECT

1.1 TITLE: Serial Bus Protocol 2 (SBP-2).

1.2 PROPOSER: X3T10.

1.3 DATE SUBMITTED: November 7, 1996

1.4 PROJECT TYPE: D

Development of a standard within an X3 Technical Committee.

2. JUSTIFICATION OF PROPOSED STANDARD

2.1 NEEDS:

The standardization of High Performance Serial Bus, IEEE Std 
1394-1995, has generated a requirement for a simple, 
flexible and command set independent transport protocol. The 
protocol should define mechanisms for the delivery of 
commands, data and status for High Performance Serial Bus 
devices.

A particular need to be addressed by the SBP-2 project is 
the definition of facilities to accommodate isochronous data 
streams.

2.2 RECOMMENDED SCOPE OF STANDARD:

The SBP-2 standard will define  transport layer protocols  
to take advantage of the continued evolution of the High 
Performance Serial Bus, IEEE Std 1394-1995.
Candidates for inclusion in the SBP-2 draft standard are:

  a) define a transport protocol that is independent of the 
     command set,
  b) develop functional specifications for SBP-2 high-
     availability factors, possibly in connection with yet 
     to be defined extensions to High Performance Serial Bus 
     transport media,
  c) provide functionality to incorporate the anticipated 
     inclusion of gigabit and greater transfer rates by High 
     Performance Serial Bus,
  d) insure SBP-2 compatibility for operations within a 
     group of High Performance Serial Buses connected by 
     bridges,
  e) provision of facilities to take advantage of the 
     isochronous data transfer capabilities of High 
     Performance Serial Bus, and
  f) other capabilities which fit within the general 
     application scope of High Performance Serial Bus that 
     may be proposed during the development phase by the 
     participants in the project.

2.3 EXISTING PRACTICE IN AREA OF PROPOSED STANDARD:

Serial Bus Protocol (X3.268-1995). Other X3T10 projects 
exist that define transport protocol(s) over different 
media, for example Fibre Channel and SSA.

2.4 EXPECTED STABILITY OF PROPOSED STANDARD WITH RESPECT TO 
    CURRENT AND POTENTIAL TECHNOLOGICAL ADVANCE:

The nature of the proposed project is to insure that SBP-2 
has an upward, highly compatible growth path. This will 
insure that investments in SBP-2 are provided with stability 
in the face of technological developments.

3. DESCRIPTION OF PROPOSED PROJECT:

3.1 TYPE OF DOCUMENT: Standard.

3.2 DEFINITION OF CONCEPTS AND SPECIAL TERMS: None.

3.3 EXPECTED RELATIONSHIP WITH APPROVED X3 REFERENCE MODELS:

The SBP-2 standard is intended for use in closed systems.

3.4 RECOMMENDED PROGRAM OF WORK:

The following program of work is planned for the SBP-2:
  a) solicit continuing participation by the current 
     membership of X3T10 through X3 procedures. Invite 
     comments and proposals from organizations that may have 
     a contribution to the SBP-2 standard,
  b) establish functional requirements for SBP-2,
  c) prepare a draft proposed standard based on proposals 
     submitted and other information gathered during the 
     initial investigation,
  d) consider the results of SBP-2 testing as may be 
     available to the committee through the voluntary 
     efforts of the X3T10 membership, and
  e) submit the draft proposed standard to X3 for further 
     processing.

3.5 RESOURCES - INDIVIDUALS AND ORGANIZATIONS COMPETENT IN 
    THE SUBJECT MATTER:

The current membership of X3T10 includes representatives 
|from all parts of the computer industry, from semiconductor 
chip manufacturers to large mainframe system manufacturers 
as well as government agencies. The members of X3T10 have 
expressed their desire to participate and cooperate in the 
development of this proposed standard.

There are sufficient resources to complete the development 
of this standard without delaying work on other projects.
High Performance Serial Bus has been adopted for use outside 
of the computer industry. X3T10 could benefit from contact 
with other groups that embody High Performance Serial Bus 
expertise. The 1394 Trade Association, which meets four 
times a year, is representative of the High Performance 
Serial Bus community and is an appropriate point of contact.

3.6 RECOMMENDED X3 DEVELOPMENT TECHNICAL COMMITTEE:

It is recommended that the development work be done in 
Technical Committee X3T10 which is responsible for 
developing lower-level interface standards.

3.7 ANTICIPATED FREQUENCY AND DURATION OF MEETINGS:

Technical Committee X3T10 meets bimonthly. Specific task ad 
hoc groups are called as may be required for one to three 
days between the regular meetings but their results are not 
binding.

3.8 TARGET DATE FOR dpANS TO X3: November, 1997.

3.9 ESTIMATED USEFUL LIFE OF STANDARD:

It is anticipated that this standard will have a life of 
five (5) years.

4. IMPLEMENTATION IMPACTS

4.1 IMPACT ON EXISTING USER PRACTICES AND INVESTMENTS:

The proposed SBP-2 standard will provide an evolutionary 
growth path to the existing practices and investments. It is 
likely that any isolated negative impacts would occur in any 
case through non-standard evolution or revolution.

4.2 IMPACT ON SUPPLIER PRODUCTS AND SUPPORT:

The proposed SBP-2 standard will provide an evolutionary 
growth path to the existing practices and investments. It is 
likely that any isolated negative impacts would occur in any 
case through non-standard evolution or revolution.

4.3 TECHNIQUES AND COSTS FOR COMPLIANCE VERIFICATION:

The committee will consider the results of SBP-2 testing as 
may be available to the committee through the voluntary 
efforts of the various participants in X3T10. With this 
method all costs are borne by the organizations of the 
various participants and have for the most part been mainly 
an adjunct of their normal development costs.

4.4 LEGAL CONSIDERATIONS:

There are no known legal considerations unique to SBP-2. A 
Call for Patents will be made.

5. CLOSELY RELATED STANDARDS ACTIVITIES

5.1 EXISTING X3 STANDARDS: None.

5.2 X3 STANDARDS DEVELOPMENT PROJECTS:

  BSR Number    Title                            Project

  X3.xxx-199x   SCSI-3 Fibre Channel Protocol    993D
  X3.268-1995   SCSI-3 Serial Bus Protocol       992D
  X3.xxx-199x   SCSI-3 Serial Storage Protocol

5.3 X3 STUDY GROUPS: None.

5.4 OTHER RELATED DOMESTIC STANDARDS EFFORTS:

  IEEE P1394a    High Performance Serial Bus (Supplement)
  IEEE P1394.1   High Performance Serial Bus Bridges
  IEEE P1394.2   High Performance Serial Bus
               (  Scalable Gigabit Extensions)

5.5 ISO/IEC JTC 1 STANDARDS DEVELOPMENT PROJECTS:

  CD xxxx-x      SCSI-3 Fibre Channel Protocol
  CD 9316-7      SCSI-3 Serial Bus Protocol
  CD xxxx-x      SCSI-3 Serial Storage Protocol

It is anticipated that SBP-2 will be proposed to 
JTC1/SC25/WG4.

5.6 OTHER RELATED INTERNATIONAL STANDARDS DEVELOPMENT 
    PROJECTS:

  ISO/IEC 1883,
  "Digital Interface for Consumer Audio/Video Equipment",
  proposed to IEC Technical Committee 84.

5.7 RECOMMENDATIONS FOR COORDINATING LIAISON: None.

5.8 RECOMMENDATIONS FOR CLOSE LIAISON:

Continue liaison with the IEEE Microprocessor Committee 
responsible for High Performance Serial Bus and its 
authorized Working Groups.

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