a reference architecture for all ip wireless networks itsumo group [email protected] an...
TRANSCRIPT
allip_ref.ppt – 2
The Objective
Propose – a reference architecture for all IP wireless networks, and
– an architecture for interworking of the proposed reference model with the existing wireless/wireline infrastructure.
allip_ref.ppt – 3
Reference Architecture of All IP Wireless Networks
Signaling &ControlVisiting Network Signaling &
Control
Wireline IP backbone network
BSC BS
BS
Home Network MRC
Internet
Regional IP network Regional IP
network
BS
BS BSC
MRC
Signaling &Control
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Network Elements
Mobile Station (MS)– User terminal
– Adaptive software radios, i.e., full flexibility in the frequency band
– Signaling entity
Base Station (BS)– Adaptive software remote multiplexer/demultiplexer
– Essentially a MAC layer repeater
Base Station Controller (BSC)– A multi-port bridge (or Switch) with an IP interface to MRC
– Interacts with the network control and management system (via the MRC) to control and manage base stations.
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Network Elements
Mobile Routing Center (MRC)– An IP Router
– Default router of all MSs behind it
– May also include BSC functions
Signaling & Control– connection management
– means of interaction between users and network control system, and among network control entities
– MAAAQ, i.e., Mobility management, Authentication, Authorization, and Accounting (AAA), and QoS management
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Interworking with today’s Mobile Telephony & PSTN
1G/2G
Access
PSTN
1G/2GAccess
3GAccess
IWUALL-IP
Signaling & Control
WG2 TG
Wireline IP backbone
3GAccess
WG3WG3
3GAccess
3G Circuit & Packet 3G Circuit & Packet
3G Packet only
PSTN & 1G/2G Signaling & Control
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Merits of the ArchitecturePros & Cons
Pros
Preserves incumbent providers’ investments in theircurrent infrastructure.
Allows for a gradual and economical migration towardsAll IP wireless networks because it minimizes themigration cost.
Allows interworking of the old & new
Cons
Requires interworking of the old & the new Proliferation of interworking units and gateways May degrade the end-to-end performance (e.g., delay,
utilization, etc.)
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Summary & Open Issues
Summary– Proposed a reference model for All IP wireless networks and its
interworking with existing infrastructure for review, enhancement, and adoption
in 3GPP2.
Open Issues– The exact functions of IP-centric BS, BSC, MRC, and signaling and
control
– The exact functions WG2 and WG3