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Multi-channel can increase the network throughput, but require new method to allocate channels. This paper proposes a new multi-channel method which utilizes multi-channel to transmitting data simultaneously. The method is based on contention graph and allocate channel with maximal clique and adapted to static wireless networks. Simulation results show that this method improves the packet delivery ratio of the link significantly.

Wireless protocols, for IEEE802.11a, provide multiple none-overlapping channels. In this paper, we present an integrated metric routing protocol for multi-channel network, called IMR. The metric of this protocol composes the channel status and node status. Simulation results show that this protocol improves network average throughput and decrease end to end delay efficiently.

Increasing throughput of wireless network is a challenging problem. This paper proposes a new MAC protocol named simple single radio multi-channel protocol (SSMP) which utilizes multi-channel to transmitting data simultaneously. Using SSMP each node has own channel status table (CST). The node selects transmitting channel with CST. Simulation results show that SSMP improves network throughput and decrease end to end delay efficiently.

The MAC layer of IEEE 802.11 standard for WLAN uses CSMA/CA protocol with binary exponential backoff. The protocol adopts a contention window with fixed minimum window size, leading to a low utilization level of channel resource. In this paper, we propose an adaptive binary exponential backoff scheme. Using this scheme the node dynamically adjust contention window according to the probability of successful transmitting. Analysis and simulation results show that compared to the traditional backoff scheme, the proposed adaptive binary exponential backoff scheme outperforms in terms of average network throughput and end-to-end delay.

Targeting the quantum communication network based on entangled states, a network model is proposed. According to the model, the quantum channel establishing rate of basic links is then analyzed. For different quantum channel establishment methods, the quantum channel establishing rates of long relay links are also analyzed. Then the quantum channel establishing rates corresponding to the point-by-point method and segmentation method are calculated. Finally, the quantum channel establishing rate between two arbitrary points in a large-scale quantum entanglement communication network is analyzed based on the percolation model. The quantum channel establishing rate in a quantum communication network of n nodes is Ω (1/n).

The two well-known on-demand protocols for ad hoc networks - DSR and AODV show degraded performance with traffic load increase. In this paper, we propose a traffic-balanced scheme, called TB scheme, to solve this problem. The TB scheme adopts MAC layer information for routing decisions. It avoids involving heavy loaded nodes in a new route and thus balances network traffic. Simulation results show that the new scheme significantly improves DSR and AODV's performance under heavy load conditions.

A concept of wireless ad hoc quantum communication network is proposed and a routing protocol is designed for wireless quantum communicaiton network with complex structure. The routing protocol is on-demand and the routing metric is based on the number of entangled particle pairs. The node that wants to send information carried by quantum state can initiate a route request and establishment procedure. The destination node chooses path by the routing metric and sends route reply message along the selected path. During the information transmission, if the quantum channel or the wirless channel between any neighbors in the selected path is broken, a route discovery process is reinitiated to set up a new route. Nodes in the selected path use a both-end approximation algorithm to establish a quantum channel. After the quantum channel is established, the quantum state is transferred by quantum teleportation and the information transfer between any two nodes in wireless ad hoc quantum communication network is finished.