Transcript No Slide Title

“Giving Voice to 4G”
Gartner Dataquest
Akshay Sharma
Research Director
Feb. 2009
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Panel
Akshay Sharma (Moderator)
Research Director - Carrier Network Infrastructure, Converged Infrastructure
Gartner
Kevin Mitchell
Director, Solutions Marketing
Acme Packet
Jeff Thompson
CEO
Towerstream
Payam Maveddat
Vice President of PLM and Marketing
Mavenir Systems, Inc.
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Comments
In the US: both AT&T and Verizon own parts of the 700 Mhz spectrum and have
committed to LTE.
According to: http://www.dailywireless.org/2008/12/10/verizon-lte-next-year/
Verizon will deploy a Femtocell LTE trial by year end,
“We expect that LTE will actually be in service somewhere here in the U.S.
probably this time next year,” said Dick Lynch, executive vice president and
chief technology officer of Verizon Communications “
CLEAR – Xohm – ClearWire: VoIP over WiMAX
Light Reading - VOIP - Clearwire Breaks Into VOIP Market - Telecom ...
Jan 22, 2008 ... Using Nortel servers, Clearwire is now offering VOIP services
over its own network infrastructure.
www.lightreading.com/document.asp?doc_id=143670
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Issues with VoIP over Mobile WiMAX?
Mobile WiMAX supports a Break-then-Make
handoff approach. Make-Before-Break is optional
 QoS metrics are granular. SLA, Quality of
Experience metrics at the end-2-end App-level
needed
 Inter-ASN roaming needs definition
 What about roaming across Carrier-managed
Spectrum and Enterprise-managed Unlicensed
Spectrum ?
 Devices ? Now Nortel, ALU have slowed R&D
 Coverage / Capacity / etc.

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But VoIP over Fixed WiMAX is Good
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VoIP
IMS ?
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Verizon IMS Architecture
Subscriber
Data
Subscriber
Data
Subscriber
Data
AS
AS
AS
Shared
Billing
Services
Access
Network
#1
UE
Decomposed
Access
Functions
UE
Access
Network
#2
Subscribers
to Verizon
IMS-based
Services
Network
Policy
Policy and
QoS
Control
…
Subscriber
Data
AS
Shared
Media
Resources
Service Orchestration
Session
Management
Verizon
IP/MPLS
Network
Network
Routing
Decomposed
Access
Functions
VoIP
Peering
Partner’s
Network
Subscriber
Data
Transit Routing
Decomposed
Access
Functions
Wholesale Customers
IMS
“Core”
MGCF
IM-MGW
IM-MGW
PSTN
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Newer Opportunities for LTE and IMS
Sector Peak Data Rate
HSPA+
LTE
Uplink @ 5MHz
11Mbps
22Mbps
Downlink @ 5MHz
R.7 22/28Mbps
R.8
42Mbps
43Mbps
Uplink @ 20MHz
NA
86Mbps
Downlink @ 20MHz
NA
173Mbps
LTE has functions such as:
The MME (Mobility Management Entity) supporting intra-RAN mobility
and handovers.
IMS supports the VCC supporting seamless handoffs across access
methods such as WiFi, 2G, 3G, and fixed access.
 with likely sporadic LTE deployments, the IMS VCC supporting
seamless handoffs to WiFi, 2G, and 3G radio access networks is likely
required
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Newer Opportunities for LTE and IMS
LTE has functions such as:
LTE has defined the Serving Gateway (S-GW) and the PDN Gateway (PGW). The S-GW and P-GW are core network functions for the LTE Radio
Access Network based access. They both act as the Policy Enforcement
Points (PEP) for dynamic QoS and policies.
IMS supports a Policy Decision Function (PDF) which can be within the
CSCF that manages the QoS over the media plane, whereby IMS
supports the Common Open Policy Service (COPS) protocol for policy
control over Quality of Service (QoS) signaling protocols.
LTE supports both the S-GW and P-GW having Diameter interfaces to
control the Policy and Charging Enforcement Function (PCEF) within the
S-GW and P-GW functions.
IMS supports the Diameter interface as well.
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Newer Opportunities for LTE/WiMAX and IMS
LTE/WiMAX will require regulatory features such as Legal Intercept and
Emergency Services for multimedia in both the wireless and wireline
space, along with Mobile IP solutions (Foreign Agent and Home Agent)
LTE/WiMAX will require carrier hosted solutions that promise future
convergence with VoIP, IPTV, with Presence and Location-based
services, which IMS: IP Multimedia Subsystems coupled with
applications servers can provide.
Additionally LTE/WiMAX will require the following which are provided by
IMS applications servers:
ENUM
User authentication
Peer-to-peer video sharing
Voice call continuity to alternate access methods
Push to talk
Rich Communication Suite
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Panel Questions
-What are the architecture and infrastructure choices for incumbent and
greenfield mobile operators for voice services?
-Where should service providers locate session-oriented service
delivery intelligence and control—in the core or the edge? What’s right
and wrong about each approach?
-What are the requirements for secure and interoperable wireless
services? Does IMS deliver all that's necessary? What additional issues
must be considered for FMC and blended wireless-wireline access
networks?
-What are the optimal technology choices relative to product availability,
cost, functionality and scalability in terms of performance and capacity?
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