collision detection


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collision detection

[kə′lizh·ən di‚tek·shən]
(computer science)
A procedure in which a computer network senses a situation where two computer devices attempt to access the network at the same time and blocks the messages, requiring each device to resubmit its message at a randomly selected time.

collision detection

(networking)
A class of methods for sharing a data transmission medium in which hosts transmit as soon as they have data to send and then check to see whether their transmission has suffered a collision with another host's.

If a collision is detected then the data must be resent. The resending algorithm should try to minimise the chance that two hosts's data will repeatedly collide. For example, the CSMA/CD protocol used on Ethernet specifies that they should then wait for a random time before re-transmitting.

See also backoff.

This contrasts with slotted protocols and token passing.
References in periodicals archive ?
In Section 5, we compare our collision detection method with other widely used detection techniques under different intensity of noise and analyze our model, and the experiments as well as the comparisons are also shown.
The collision detection method is largely classified into a method of detecting all nodes of an object and a boundary deteciton method of an object represented by a bounding volume.
These three new types of collision space use different collision detection algorithms and different data structures.
According to our literature review, although research to date has explored a number of aspects of rear-end collision detection, the assumptions and test data used for such collision detection are different.
The rest of this paper is arranged as follows: Section 2 introduces the mathematical basis of the optimal collision avoidance planning, including the evaluation function, the calculation of the parameters of the evaluation function, the TRAC-IK inverse kinematics solver, and the collision detection method; Section 3 presents an overall framework of optimal collision avoidance planning based on trajectory evaluation; in Section 4, we set different evaluation functions of collision avoidance trajectory and test the optimal collision avoidance trajectory planning method proposed in this paper; Section 5 discusses the influence of the replanning time on the optimal trajectory and the statistical law of the parameters of the collision avoidance trajectory; this paper concludes in Section 6.
Inspections of the subway projects are mainly divided into two aspects: one is the single professional of collision detection which are collision detections on construction model and integrated pipelines, the other is overall professional model collision detection.
Table 1 summarizes the existing systems for collision detection and avoidance in airport environment with the details of various aspects such as flight phases covered, performance parameters and limitations.
A literature review of bounding volumes hierarchy focused on collision detection
Collision detection now works with all imported IFC MEP elements as well.
Silicon photonics could significantly increase the power and speed of machines such as supercomputers, data center servers and the specialized computers that direct autonomous cars and drones with collision detection. Eventually, the technology could reach home computers and mobile devices and improve applications from gaming to video streaming.
Nissan has said it hopes to introduce at least some autonomous driving technologies--such as self-parking cars and collision detection systems, to cars by 2016.
In 2010, it installed its first surface-mining CAS at Alcoa's Huntly bauxite mine in Western Australia, marking the company's introduction of a family of turnkey proximity and collision detection systems for the OEM and retrofit market.

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