1. Mobicents
Diameter
Progress,
Use
Cases
and
Roadmap
Alexandre
Mendonça
&
Bartosz
Baranowski
8th
December
2011
@
Sochi,
RU

2. Agenda
• Overview
• IntroducKon
to
Diameter
• Architecture
• Use
Cases
• Roadmap
• 2010/2011
Roadmap
Review
• Community
• Overview
• Releases
• Roadmap
• 2011/2012
Roadmap
Preview
• Releases

3. Introduction
to
Diameter
• Born
as
the
Next
GeneraKon
AAA
Protocol
to
replace
RADIUS
• ..but
much
more
than
just
that,
being
widely
used
for
several
other
purposes
• Base
protocol
defines
the
message
format,
peer
connecKon
related
operaKons
and
basics
for
AccounKng
and
AuthenKcaKon/AuthorizaKon
• Base
(or
any
other
ApplicaKon)
is
easily
extended
by
adding
new
messages
and/or
AVPs
• So
easy
everybody
is
having
their
own
customized
ApplicaKons,
with
barely
no
standard
ApplicaKons
usage
• Byte-­‐oriented
messages,
consisKng
of
header
and
payload
(AXribute-­‐Value-­‐Pair,
AVPs)

4. Architecture:
Overview

5. Architecture:
HA/FT
Cache
Session-­‐Id:
1
Type:
X
…Data…
Session-­‐Id:
2
Type:
Y
…Data…
Session-­‐Id:
3
Type:
X
…Data…
…
Node
1
Supports
X
&
Y
Node
2
Supports
Y
…

6. Architecture:
HA/FT
• Selected
Session
Data
is
replicated
to
cache
a_er
processing
the
received
iniKal
Request
• At
any
Kme,
any
node
can
pick
and
resume
any
session,
by
invoking
proper
method
in
stack
for
reconstrucKng
session
locally
• Ideally
allow
by
configuraKon
to
prefer
to
choose
the
node(s)
which
already
have
session
locally
• Once
session
is
reconstructed,
session
data
is
kept
locally
to
avoid
the
overhead
of
recreaKng
it
every
Kme
• Once
session
is
terminated,
all
nodes
are
noKfied
and
clear
their
local
session
data

7. Use
Cases:
Online
Charging

8. Roadmap:
2010/11
Review
• “Improve
Stability
and
Performance”
• Jenkins
soak
test
job
running
weekly
at
750
requests/second
for
2.5
hours
in
Mobicents
JAIN
SLEE
• Total
of
7.000.000
Requests,
usually
with
no
missed
requests.
• Last
year
Performance
goal
was
set
to
1000
requests/second.
Got
up
to
9000
requests/second
!
• Using
an
iMac
Core
2
Duo
@
3.06
GHz
/
4GB
RAM,
no
special
setup.
• Eventually
with
a
beXer
setup,
the
numbers
may
go
quite
higher.
150
800
9000
0
5000
10000
Requests/s
2009
2010
2011

9. Roadmap:
2010/11
Review
• “Support
more
applicaKons,
by
request”
• Added
support
for
Gx,
Gq’,
Rx,
S6a
ApplicaKons
• ContribuKons
included
Diameter
Stack
support
and
JAIN
SLEE
Resource
Adaptors
as
well
• All
of
them
were
contributed
by
community
users
• Some
were
only
parKally
developed,
to
fit
the
users
needs…
we
implemented
the
remaining
• Gx
was
a
collaboraKve
contribuKon
between
two
different
users,
from
Free
Mobile
and
Smilescom
• Great
to
see
community
work
together!
• All
were
reviewed,
fixed
and,
when
possible,
sent
back
to
the
authors
for
validaKon
in
their
working
environment

10. Roadmap:
2010/11
Review
• “Support
of
other
funcKonal
nodes
besides
client
and
server:
Redirect,
Relay
and
Proxy”
• Redirect
and
Relay
support
integrated
into
stack
• Proxy
support
through
applicaKon
• Already
tested
and
used
(with
bugs
found)
by
community
users
(from
Free
Mobile)
• “Extend
testsuite”
• Greatly
increased
the
testsuite
for
both
Diameter
Stack,
Diameter
RAs
and
funcKonal
tests
for
replicaKon
scenarios
• Currently
Diameter
Testsuite
contains
594
JUnit
tests,
and
increase
of
100%
from
last
year.

11. Roadmap:
2010/11
Review
• Some
shortcomings:
• Missed
the
goal
to
support
TLS
/
IPSec
• Failed
the
“More
Examples”
target
• Mainly,
no
B2BUA
integraKon
example
with
JAIN
SLEE
or
SIP
Servlets
• Projected
Roadmap
not
followed
• More
1.3.x
releases,
less
1.4.x
releases
• Haven’t
yet
reached
the
1.4.0.FINAL
release
• No
pluggable
Diameter
Load
Balancing
algorithms
and
no
integraKon
with
Mobicents
Load
Balancer
• No
improvement
on
DocumentaKon
regarding
development
with
stack
• No
progress
on
JAIN
SLEE
HSS
work
or
SIP
Presence
integraKon

12. Diameter
Charging
Server
• Standalone
applicaKon,
started
as
a
test
project
for
our
own
tesKng,
Diameter
Charging
Server
Simulator
• Made
source
and
binary
available
to
public
for
using
with
Mobicents
SIP
Servlets
Ro
(Online
Charging)
Example
• 600
Downloads
for
the
first
version
(since
May
2010).
It’s
now
deprecated
and
not
available
for
download
• Updated
at
May
2011
with
some
scenario
improvements
and
some
fixes
requested
by
community
• 300
Downloads
for
the
new
version
so
far
• Migrated
to
JAIN
SLEE
as
for
a
requested
customized
development,
but
with
public
availability
in
mind
• Not
yet
available
for
public.
To
be
soon.

13. Community:
Overview
• Growing
User
Base
• Increasing
traffic
on
public
mailing
list
• Over
40
User
Reported
Issues
from
11
different
users/companies
• Last
year
we
had
12
issues
reported
by
2
users
• Many
small
patches
submiXed
by
users
• Several
users/companies
using
Mobicents
Diameter
for
Interoperability
TesKng
(IOT)
successfully
and
contribuKng
components
(not
all
complete):
• Rx
ApplicaKon
Stack
Support
and
Resource
Adaptors
• Gx
ApplicaKon
Stack
Support
and
Resource
Adaptors
• Gq’
ApplicaKon
Stack
Support
and
Resource
Adaptors
• S6a
ApplicaKon
Stack
Support
and
Resource
Adaptors

14. Community:
Releases
Compliance,
Performance
&
Stability
Enhancements
• Improved
Online/Offline
Charging
API
• 1000+
requests/second
• 7x
Performance
Improvement:
7000+
Requests/second
• Gx
ApplicaKon
Support
• DicKonary/Validator
available
to
applicaKons
• Performance
Improvement:
~8500
Requests/second
• Improved
Cluster
Support
(Fine
Graining
Replicated
Data)
• Reworked
DicKonary/Validator
Format
• Gq’
ApplicaKon
Support
• Diameter
Agent
Support
• Extended
testsuite
(100+
JUnit
Tests
added)
• Rx
ApplicaKon
Support
• Improved
ApplicaKon
Session
Management

15. Community:
Overview
• 2300
downloads
since
last
year
1.3.2.FINAL
1.3.3.FINAL
1.4.0.BETA1
1.4.0.BETA2
1.4.0.CR1

16. Roadmap:
2011/12
Preview
• No
major
concerns
with
stack
performance,
good
enough!
• Try
to
improve
the
performance
os
SLEE
RAs,
which
is
not
so
good
• Support
TLS
and
IPSec
security
• Integrate
with
Mobicents
Load
Balancer
• Create
integraKon
example
with
B2BUA
both
for
JAIN
SLEE
and
MSS,
in
single
node
and
clustered
environment
• Improve
Agent
support,
integraKng
proxy
as
stack
feature
instead
of
support
through
applicaKon
• Support
SCTP
transport

17. Roadmap:
Releases
• 1.4.0.CR2
_
December
2011
• Diameter
S6a
Support
(Stack
and
JAIN
SLEE)
• Diameter
Agent
ConfiguraKon
• 1.4.0.FINAL
_
March
2012
• IPSec/TLS
Support
• Stack
Development
DocumentaKon
• 1.4.1.FINAL
_
June
2012
• Integrate
with
Mobicents
Load
Balancer
• IntegraKon
with
JAIN
SLEE
B2BUA
(eventually
MSS
too)
• 1.4.2.FINAL
_
September
2012
• Pluggable
Diameter
Load
Balancing
algorithms
• HSS

18. Questions?