This chapter covers the problem of negotiation mechanism in IEEE 802.11-based ad hoc networking whose functioning components, being user devices or relay nodes over the wireless or Internet, interchange data using the classic MAC-DCF. In order to overcome the existing bottleneck of negotiation procedure in wireless ad hoc networks, we propose a new channel reservation scheme which basically helps to reduce the negotiation overheads and reduce the transmission delays without any extra bandwidth consumption. Then, the extended multi-channel CRF scheme for new multi-channel applications are discussed for shared controllability and increased multi-channel applications, each on separate frequencies. In order to solve the problem of access identification, a recent distributed channel reservation scheme is explained and reviewed where critical persistent problems such as hidden terminals and coexistence of control and data traffic on different frequency channels have been discussed in detail.

Chapter Contents:

• 13.1 Introduction
• 13.1.1 Medium access protocol
• 13.2 Channel reservation: Advantages and drawbacks
• 13.3 Distributed channel reservation without separate control and data channels
• 13.3.1 Single channel CRF
• 13.3.2 Multi-channel CRF
• 13.4 Performance evaluation
• 13.5 Distributed channel reservation with separate control and data channels
• 13.5.1 M-DQDC overview
• 13.5.2 Distributed queue
• 13.5.3 Negotiation
• 13.5.4 Post-backoff
• 13.6 Evaluation results
• 13.7 Further development
• 13.8 Conclusion
• References

Inspec keywords: electronic data interchange; telecommunication traffic; access protocols; relay networks (telecommunication); ad hoc networks; quality of service; wireless channels; delays; wireless LAN; Internet

Other keywords: MAC-DCF; distributed channel reservation MAC protocol; channel reservation scheme; relay node; data interchange; extended multichannel CRF scheme; Internet; dynamic wireless ad hoc network; frequency channel; data traffic; IEEE 802.11-based ad hoc networking; bandwidth consumption; transmission delay reduction; QoS improvement technique

Subjects: Local area networks; Protocols; Radio links and equipment; Computer communications; Protocols