hidden flag - ορισμός. Τι είναι το hidden flag
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Τι (ποιος) είναι hidden flag - ορισμός

PROBLEM IN WIRELESS NETWORKING
Hidden Terminal Problem; Hidden terminal; Hidden terminal problem; Hidden station problem; Hidden node; Wireless hidden node problem

hidden flag      
(scientific computation) An extra option added to a routine without changing the calling sequence. For example, instead of adding an explicit input variable to instruct a routine to give extra diagnostic output, the programmer might just add a test for some otherwise meaningless feature of the existing inputs, such as a negative mass. The use of hidden flags can make a program very hard to debug and understand, but is all too common wherever programs are hacked in a hurry. [Jargon File] (1994-11-24)
Hidden profile         
Hidden profile problem; Hidden profiles
A hidden profile is a paradigm that occurs in the process of group decision making. It is found in a situation when part of some information is shared among group members (i.
Hidden mother photography         
PHOTOGRAPHY GENRE
Hidden mother; Hidden mothers; Hidden mother photograph
Hidden mother photography is a genre of photography common in the Victorian era in which young children were photographed with their mother present but hidden in the photograph. It arose from the need to keep children still while the photograph was taken due to the long exposure times of early cameras.

Βικιπαίδεια

Hidden node problem

In wireless networking, the hidden node problem or hidden terminal problem occurs when a node can communicate with a wireless access point (AP), but cannot directly communicate with other nodes that are communicating with that AP. This leads to difficulties in medium access control sublayer since multiple nodes can send data packets to the AP simultaneously, which creates interference at the AP resulting in no packet getting through.

Although some loss of packets is normal in wireless networking, and the higher layers will resend them, if one of the nodes is transferring a lot of large packets over a long period, the other node may get very little goodput.

Practical protocol solutions exist to the hidden node problem. For example, Request To Send/Clear To Send (RTS/CTS) mechanisms where nodes send short packets to request permission of the access point to send longer data packets. Because responses from the AP are seen by all the nodes, the nodes can synchronize their transmissions to not interfere. However, the mechanism introduces latency, and the overhead can often be greater than the cost, particularly for short data packets.