SIP-based Presence and Messaging Services in Wireless Networks - PowerPoint PPT Presentation

1 / 15
About This Presentation
Title:

SIP-based Presence and Messaging Services in Wireless Networks

Description:

Services in Wireless Networks Markus Isom ki Nokia Outline Current advances in wireless terminal capabilities Specific aspects of wireless terminals Roadmap of SIP ... – PowerPoint PPT presentation

Number of Views:54
Avg rating:3.0/5.0
Slides: 16
Provided by: Marku57
Category:

less

Transcript and Presenter's Notes

Title: SIP-based Presence and Messaging Services in Wireless Networks


1
SIP-based Presence and Messaging Services in
Wireless Networks
  • Markus Isomäki
  • Nokia

2
Outline
  • Current advances in wireless terminal
    capabilities
  • Specific aspects of wireless terminals
  • Roadmap of SIP services in wireless terminals
  • Standardization status and estimates for
    presence, messaging and chat
  • IETF SIMPLE, SIPPING and SIP
  • 3GPP Release 6

3
What Is Happening With Wireless Terminals During
2003
  • Large colour displays
  • Graphics, pictures, video, more advanced UIs
  • Digital cameras
  • Enable Messaging (currently MMS) Presence with
    images
  • Personal/shared photo albums
  • Video cameras
  • Near-real time streaming
  • Messaging with video clips (large size!)
  • Enhanced data rates
  • GPRS available in most new models
  • WCDMA during 2003 with 100 kbps

4
Wireless Terminals Other Key Aspects
  • Standardized/Open APIs
  • Java, Symbian
  • Downloadable applications
  • Games etc.
  • Specialization
  • Different models are good for different
    applications
  • Multi-terminal ownership and use
  • This will set demands on protocols
  • Combined use with laptops fixed PCs

5
Available Protocols and Services
  • MMS
  • Camera phones with GPRS taking off
  • Wireless Village
  • The first wave of Instant Messaging, Presence,
    Chat
  • E-mail
  • WAP/Web browsers
  • Near real-time audio/video streaming, evolving
    toward RTSP
  • Many nice downloadable applications with
    proprietary protocols
  • IM Presence
  • Games
  • But there are still limitations
  • Updating software is a major headache still in
    the future - Unlike in the PC world, the first
    software version MUST work and interoperate
  • Interoperable products require good and mature
    standards!

6
Special Aspects of Wireless Terminals
  • Limited bandwith
  • Applications will work, but response times may
    become frustratingly long if protocols are not
    done right
  • Signaling Compression (SigComp) and RTP/UDP/IP
    header compression (RoHC)can deal with protocol
    overhead
  • Protocols should be designed to send only changed
    data, not always the full state
  • User interface
  • Displays are still relatively small, not many
    concurrent windows
  • Relatively difficult to type phonebook becomes
    an essential aid
  • It is necessary to integrate all aspects of the
    application into a single coherent UI using
    browser for application data configuration not
    very handy

7
SIP in Wireless Terminals
  • It will be one of the main protocols in IP-based
    terminals
  • Important to have open APIs for developers
  • The first phase (2003-2005) will be mainly
    non-real-time services
  • Presence
  • Instant messaging
  • Multi-party Chat
  • Setting up sessions for near-real-time voice,
    video and games
  • After that (2005-gt) strict real-time applications
    will follow
  • Voice
  • Video
  • Multimedia conferencing
  • Application sharing?

8
Standardization Status
  • IETF
  • Main source of the protocol specifications
  • SIMPLE WG Presence, Instant Messaging, Data
    Manipulation
  • SIPPING WG Conferencing
  • SIP WG Approving the SIP extensions
  • 3GPP
  • Ahead of IETF in requirement setting
  • Makes protocol profiles of IETF RFCs for IMS
    architecture
  • Presence
  • IMS Messaging Evolution
  • IMS Group Management
  • OMA
  • IMPS WG
  • Working on SIP/SIMPLE, but unclear what the scope
    of that work will be vs. IETF and 3GPP
  • Interoperability between SIP/SIMPLE and Wireless
    Village

9
IETF SIMPLE/SIPPING Main Ongoing Issues 1/2
  • Presence Publication
  • SIP-based method selected
  • New requirements coming from multi-terminal use
    cases
  • For instance overriding the information published
    by another terminal
  • Presence Information Document format extensions
  • Media capabilities express preference/support
    for voice, video, IM etc.
  • Proposal to re-use SIP Callee Capabilities exists
  • Carrying multimedia content images, logos
  • Presence event filtering
  • Will be on SIMPLE WG charter
  • Filtering will be event package specific, generic
    solution too complex
  • Rules on triggering and content
  • Instant Messaging sessions
  • Proposals about the transport protocol have
    varied through the last year, hopefully stable now

10
IETF SIMPLE/SIPPING Main Ongoing Issues 2/2
  • Presence list
  • Messaging enhancements
  • Requirements draft just published
  • Still open whether all the features feasible with
    SIP
  • Storage retrieval, conference invitations,
    group messaging, etc.
  • Conference Policy Control Protocol
  • Creating Conferences and setting up conference
    parameters
  • Invitation list, access lists, participant rights
  • This is essential already for the multi-party
    chat service
  • Data manipulation
  • Requirements draft exist in SIMPLE WG
  • -gt Next page

11
IETF SIMPLE Data Manipulation
  • Standardized protocol to configure application
    settings
  • This could be done with a Web/WAP browser, but it
    would be clumsy in wireless terminals
  • Management of presence and messaging lists
  • CREATE list, DELETE list, ADD entry, REMOVE entry
  • Management of presence authorization policies
  • Logic which determines which lists/groups are
    able to see what information
  • Can be a simple scripting language
  • Could be fixed without possibility to change
  • Management of those lists (e.g. block, allow,
    private)
  • Similar to presence and messaging list management
  • Must work in an environment where multiple
    clients manage the same data
  • Atomicity of operations
  • Notification of changes, synchronization
  • ACAP and SOAP with SIP notifications proposed as
    potential solutions

12
Example Presence Scenario
13
3GPP Release 6 - Related Work Items
  • Presence
  • Requirements stable
  • Architecture and protocol selections mainly done,
    authorization and list management not specified
    yet
  • Mapping of IETF solutions to IMS Stage-3
    specifications ongoing, protocol requirements
    submitted to the IETF
  • Official 3GPP Completion target 06/2003
  • IMS Messaging Evolution
  • Immediate, deferred delivery and session based
    messaging
  • Requirements stable
  • Architecture and protocol selection work done
  • Immediate -gt SIP MESSAGE
  • Deferred Delivery -gt MMS
  • Session based -gt SIP messaging sessions
  • Official 3GPP Completion target 09/2003
  • IMS Group Management
  • Requirements stable
  • Should be harmonized with IETF data manipulation
    and conference control work
  • Official 3GPP Completion target 09/2003

14
3GPP IP Multimedia Subsystem Release 6
Presence Messaging Conferencing
Data Manipulation Conference Control
Sh
APSE
HSS
Cx
ISC
Diameter
Gm
Mw
Mw
P-CSCF
S-CSCF
I-CSCF
Compression
COPS for Policy Control
WCDMA EDGE GPRS
Go
MGCF/BGCF
GGSN
GPRS Core
PSTN
Visited Domain
Home Domain
15
Conclusions
  • Basic SIP specifications from the IETF and 3GPP
    Release 5 IMS are stable and ready to result in
    interoperable products
  • Presence, Messaging, Chat and Session setup for
    non-real-time applications are the first uses of
    SIP in wireless terminals
  • Many more standards (RFC, 3GPP TS) still needed
    to assure interoperability with all advanced
    features
  • SIP PUBLISH
  • Instant messaging sessions
  • Data Manipulation protocol (especially important
    for wireless!)
  • Conference Policy Control Protocol
  • Target is to get the standards complete during
    2003 to allow mass-market deployment during 2004!
Write a Comment
User Comments (0)
About PowerShow.com