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Chapter 13: Hybrid Wireless Networks

Introduction Next-Generation Hybrid

Wireless Architectures Routing in Hybrid Wireless

Networks

Pricing in Multi-hop Wireless Networks

Power Control Schemes in Hybrid Wireless Networks

Load balancing in Hybrid Wireless Networks

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Introduction Next-generation wireless systems are expected to support a wide range of

advanced services:• Support both data and voice traffic

• Cellular systems:

• 1G focused on efficient frequency usage for voice transmission.

• 2G focuses on efficient spectrum usage for voice transmission.

• 3G focuses on efficient data traffic.

• Hybrid wireless network architectures combine multi-hop radio relaying and infrastructure support to provide high-capacity wireless networks.

Next-generation hybrid wireless architectures• Multi-hop cellular network (MCN)

• Integrated cellular and ad hoc replaying system (iCAR)

• Hybrid wireless network (HWN)

• Self-organization packet radio networks with overlay (SOPRANO)

• Multi-power architecture for cellular networks (MuPAC)

• Throughput enhanced wireless in local loop (TWiLL)

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Classification of Hybrid Architecures

Systems with host-cum-relay (host-Cumulative-relay) stations• The dedicated relay stations do not originate data traffic on their own and

assist in forwarding on behalf of the sender.

• Single-Mode systems: MHs operate only multi-hop mode.

• Multi-Mode Systems: the mobile hosts act either in single-hop mode or in multi-hop mode depending on the architecture.

• High-mobility systems

• Limited-mobility systems Systems with dedicated relay stations

• Dedicated relay stations are used for relaying data traffic.

• Single-mode systems

• Multi-mode systems