Moving Away from Collision Avoidance: Aborting Collisions in Wireless Networks
نویسندگان
چکیده
Wireless networks are founded on the principles of collision avoidance. This paper makes an attempt to detect and abort collisions in wireless networks. Briefly, the receiver uses physical layer information to detect collisions, and immediately notifies the transmitter to abort transmission. The collision notification consists of a unique signature, sent on the same frequency channel as the data. The transmitter uses a second listener antenna to discern this notification through signature correlation. The transmitter aborts, freeing the channel for other productive transmissions. We call this Carrier Sense Multiple Access with Collision Notification (CSMA/CN). Early results from a small USRP/GNURadio testbed confirm the feasibility and performance gains with CSMA/CN.
منابع مشابه
An Information-Communication System for Early Warning and Collision Avoidance in Road Traffic
The presented system takes the advantage of information-communication technology, ICT and introduces wireless networks’ methodology into vehicles and road infrastructure for a significant enhancement of road traffic safety. Warning signals are transmitted to the back of column of vehicles and it enables the distant drivers to stop in time or to make such operation automatically. Largescale simu...
متن کاملOptimizing the Redundancy in Wireless Networks Using Chorus
A wireless network sees an explosive growth in past few decades, making adhoc networks as a part of life. In large scale wireless networks information is transmitted in multihop fashion. Multihop may be exist all the time due unavailibity of links which causes delay, a significant issue. Broadcasting is fundamental operation in wireless networks which experiences problems like congestion, colli...
متن کاملBeacon Frame Collision Avoidance Scheduling in Cluster-tree Wireless Sensor Networks
In beacon-enabled mode, beacon collision is a significant problem for the scalability of cluster-tree wireless sensor networks. In this paper, multichannel window scheduling (MCWS) is proposed to prevent beacon collisions and provide scalability. It enables large-scale wireless sensor networks based on a cluster tree to be scalable and effectively constructed.
متن کاملWireless with Collision Avoidance ( CSMA - CA )
The most popular strategies for dealing with packet collisions at the Medium Access Control (MAC) layer in distributed wireless networks use a combination of carrier sensing and collision avoidance. When the collision avoidance strategy fails such schemes cannot detect collisions, and corrupted data frames are still transmitted in their entirety, thereby wasting the channel bandwidth and signif...
متن کاملProposed ST-Slotted-CS-ALOHA Protocol for Time Saving and Collision Avoidance
Time Saving and energy consumption has become a vital issue that attracts the attention of researchers in Underwater Wireless Sensor Networks (UWSNs) fields. According to that, there is a strong need to improve MAC protocols performance in UWSNs, particularly enhancing the effectiveness of ALOHA Protocol. In this paper, a time-saving Aloha protocol with slotted carrier sense proposed which we c...
متن کامل