Distributed code assignments for CDMA Packet Radio Network
IEEE/ACM Transactions on Networking (TON)
On the self-similar nature of Ethernet traffic (extended version)
IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
Analysis of TCP performance over mobile ad hoc networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
An unslotted multichannel channel-access protocol for distributed direct-sequence networks
Mobile Networks and Applications
Antennas and Propagation for Wireless Communication Systems
Antennas and Propagation for Wireless Communication Systems
Wireless LAN Standards and Applications
Wireless LAN Standards and Applications
Principles of Wireless Networks: A Unified Approach
Principles of Wireless Networks: A Unified Approach
Minimal CDMA Recoding Strategies in Power-Controlled Ad-Hoc Wireless Networks
IPDPS '01 Proceedings of the 15th International Parallel & Distributed Processing Symposium
CDMA-based MAC protocol for wireless ad hoc networks
Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computing
Theoretical Maximum Throughput of IEEE 802.11 and its Applications
NCA '03 Proceedings of the Second IEEE International Symposium on Network Computing and Applications
ISPAN '00 Proceedings of the 2000 International Symposium on Parallel Architectures, Algorithms and Networks
Scalability of routing methods in ad hoc networks
Performance Evaluation - Performance 2005
On the effect of traffic models to the performance of ad hoc network
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume I
Node density and connectivity properties of the random waypoint model
Computer Communications
Distributed resource allocation for DS-CDMA-based multimedia ad hoc wireless LANs
IEEE Journal on Selected Areas in Communications
Scalable routing strategies for ad hoc wireless networks
IEEE Journal on Selected Areas in Communications
MVDR-based smart antenna MAC for MANETs
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
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Random access schemes operate typically on a contention based common channel, which brings problems with increasing traffic load. These problems are emphasized in a multi-hop wireless ad hoc network environment. Efficient collision avoidance methods are needed, but they also tend to decrease the spatial capacity of the network. With CDMA (Code Division Multiple Access), it is possible to make multiple simultaneous co-located successful transmissions and thus increase network capacity within the limits of multiple access interference (MAI). Bi-code channel access (BCCA) is a method to apply CDMA in ad hoc networking, providing also a common access channel for network connectivity maintenance and self-configuration. With BCCA, collisions are rare, and thus, more straightforward medium access control (MAC) methods can be used. A MAC solution designed especially for BCCA (BC-MAC) and ad hoc networking increases the efficiency of the channel usage. As BCCA is based on receiver code CDMA, the spreading code of the next hop node is needed. A novel network layer spreading code distribution (NSCD) method is proposed for this purpose. The spreading codes are distributed within routing protocol control packets at the route establishment phase. A detailed study on the performance behavior of different methods is provided. Also, interesting aspects considering the ad hoc network operation are discussed. Instead of the widely used unrealistic cut propagation model, a propagation model with realistic MAI calculation is used in this study. It is shown that the use of NSCD increases the network control load only slightly, and that the performance is practically the same as it is with the assumption of known spreading codes. BCCA with its dedicated MAC and NSCD clearly outperforms commonly used methods (like IEEE 802.11) and yet is easy to implement, robust for design parameters under different conditions while maintaining the original idea of ad hoc networking.