Download When WiMAX meets IMS TextStart WiMAX features wide coverage

When WiMAX meets IMS
TextStart
WiMAX features wide coverage, high bandwidth, easy deployment, and is applicable
to fixed, roaming, and mobile scenarios. WiMAX is one of the best existing high-speed
wireless broadband access technologies to cover areas not reached by wired broadband
access, plus offers radio access bearers (RAB) for various IP-based services.
As an internationally recognized and future-oriented core network architecture, the IP
Multimedia Subsystem - IMS is integrated with IT and communications functions to
help operators quickly provide abundant multimedia services. The IMS can be carried
over several broadband access technologies to provide an open service environment,
help operators to rapidly introduce new services, save operational costs, and lay a
foundation for FMC.
Being an industry-leading equipment vendor in the field of ALL IP transformation,
Huawei offers a complete product line from terminal to access network, core network,
service system, and BSS/OSS. Moreover, Huawei has in-depth WiMAX and IMS
convergence knowledge. Huawei' s WiMAX+IMS convergence solution incorporates
the advantages of WiMAX and IMS networks to provide rich service experiences for
subscribers.
WiMAX+IMS convergence solution
Most WiMAX operators today are newcomers who focus on Internet access and VoIP
services, and emphasize the need for reducing initial TCO and carrying out smooth
expansion based on service requirements. Huawei' s WiMAX+IMS convergence
solution is based on in-depth experience and a thorough understanding of operator
needs.
The solution optimizes and integrates WiMAX and IMS network architecture. Both the
CSN (Connection Service Network, including AAA, EMS, BSS/OSS, and DHCP/DNS)
of the WiMAX network and the core components of the IMS network are based on
advanced telecom computing architecture (ATCA), featuring high integration, fine
scalability, and high reliability.
Apart from the BTS, all of the components (GW, CSN, and networking equipment) on
the WiMAX network side are integrated into one cabinet, whereas all the components
on the IMS network side are configured in two cabinets. The BSS/OSS, EMS, and
DNS/DHCP can be shared between WiMAX and IMS networks.
According to actual network topology, the BSS/OSS of the existing network can be
connected and the existing DNS/DHCP can be reused. This helps operators to quickly
deploy a network and launch services, reducing the CAPEX. The solution further
reduces the OPEX with unified network management, a small floor space, and low
power consumption. Capacity for 50,000 subscribers with 1Gbit/s throughput at the
initial phase of network construction can be realized. When there are more than 50,000
subscribers, network capacity can be increased by adding subracks and gateways.
In later versions of the convergence solution, the integration will be further improved
with all the components integrated into one cabinet and the provision of Internet access
services; the solution also decreases CAPEX and OPEX, while offering even richer
multimedia services for subscribers.
Key features
Support network convergence
The WiMAX+IMS convergence solution supports SIM/USIM-based certification. In
the SIM/USIM-based certification solution, the WiMAX access certification adopts the
EAP-SIM and EAP-AKA, whereas the IMS access certification uses IMS-AKA.
Operators and subscribers only need to maintain the same certification indicator
(SIM/USIM). The SIM/USIM-based certification solution can reuse the existing
equipment (HLR/HSS) and operational processes, which proves to be particularly
suitable for mobile operators.
In the near future, the solution will support data center sharing. At that time, the
certifications among the AAA, HSS, and HLR will allow data sharing, and the
convergence between WiMAX+IMS+GSM and WiMAX+IMS+UMTS will be
complete.
For convergent charging, the convergence solution supports SCP-based pre-payment.
A subscriber can enjoy both Internet access services and VoIP services through the
AAA and IN interface and the operator has the convenience of convergent charging.
Later versions of this solution can support service flow-based charging rules through
PCC architecture. By transmitting the charging indicator between entities, the charging
correlation between the application level and the service flow level can be realized. The
correlated charges can then be sent to the billing center for convergent charging.
The Huawei WiMAX+IMS convergence solution supports the charging based on
traffic, duration, traffic+duration, and events. The flexible charging modes guarantee
charging policies from the technical support perspective.
In terms of convergence network management, the network equipment of WiMAX and
IMS can share the same EMS system. The EMS system supports standard northbound
interfaces for connecting the existing or the third-party NMS system.
Presently, Huawei' s iManager M2000 supports unified management of WiMAX and
IMS network equipment, and unified terminal maintenance. Soon, operators will be
also allocating dynamic services for terminals, upgrading batches of hardware and
software, monitoring and diagnosing status and performance, and managing the CPE
Intranet terminal equipment.
Provide E2E QoS assurance
The Huawei WiMAX+IMS convergence solution can provide end-to-end QoS
assurance and can deploy static QoS and dynamic QoS solutions in different phases
according to the QoS requirements for carried services.
The solution offers end-to-end QoS features for carried services. At the air interface on
the access side, the BS and MS support five types of priority services (UGS, ertPS, rtPS,
nrtPS, and BE) that are defined in the 802.16e standards. On the network side, the BS
and GW support the mapping between the priority of the air interface and that of the IP
bearer network (DSCP and 802 1p/Q), and then perform QoS classification and
labeling, traffic monitoring, traffic shaping, congestion avoidance, and congestion
management through the DiffServ model.
Currently, the solution supports static QoS. When terminals access the network, the
solution presets service flows to establish transmission channels for services and
guarantees end-to-end QoS. Because the static QoS solution does not impose high
requirements on the network and does not require the PCC architecture, it can quickly
support triple-play applications. However, due to the limited number of static service
flows, resources need to be reserved, causing relatively low resource usage.
The dynamic QoS solution is based on the PCC architecture of the WiMAX Forum. It
can dynamically set up, modify, and release relevant service flows according to
requirements, enhance resource usage and guarantee QoS for dynamic IMS services.
Furthermore, it can be correlated with the WiMAX bearer network charging and IMS
service network charging during the same session through the PCC architecture and
provide flexible charging policies.
Deliver abundant multimedia services
Huawei' s WiMAX+IMS helps operators to provide high-speed Internet access services
and abundant IMS services to end users at anytime and anywhere with any type of
terminal (mobile, fixed, PC etc.). Additionally, end users can freely customize or cancel
terminal services, personalized Ring Back Tone services, and Multimedia Messaging
services through the unified Web Portal on the Internet and cater to the interactive
services development trend.
VoIP service based on Huawei' s WiMAX+IMS enables subscribers to enjoy the same
service experiences as those using traditional communications technology. New
telecom services of high reliability, high security, and high quality can be introduced to
the Internet.
The convergent IP Centrex solution directly supports enterprise-level group services
such as group calling and web calling. For example, when a subscriber receives an
email through web calling and wants to call the sender, he or she only needs to click on
the Call button on the email toolbar.
The combination of WiMAX high-speed wireless broadband access and IMS
convergence features make applications of video services such as advertising, video
monitoring, and multimedia video conferencing much more convenient and wider in
scope.
Based on the Huawei voice call continuity (VCC) service and the subsequent
voice/video call continuity (V2CC) service, the convergence solution guarantees a
seamless switchover of voice, video and data services between the UMTS/GSM/PSTN
network and the WiMAX+IMS network. More importantly, services are not affected
during the switchover, and subscribers can make or receive cost-effective and
convenient calls.
Huawei is constantly striving to ramp up the development of WiMAX+IMS
convergence standards. Proposals pertaining to WiMAX+IMS convergence
solution-based P-CSCF detection processes, PCC architecture-based mobile
enhancement functions, static/dynamic preset flow handling processes, and the
charging correlation between the bearer network and the application layer have been
approved. Additionally, Huawei has applied for several patents on WiMAX+IMS
convergence.
In June 2007, Huawei established a demonstration center for its WiMAX +IMS
convergence solution to present services such as video calling and videoconferencing.
By doing so, Huawei has provided a genuine service experience platform for its
customers.
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