DocumentCode :
3559041
Title :
Communication Through Jamming Over a Slotted ALOHA Channel
Author :
Bhadra, Sandeep ; Bodas, Shreeshankar ; Shakkottai, Sanjay ; Vishwanath, Sriram
Author_Institution :
DSPS R&D, Texas Instrum., Dallas, TX
Volume :
54
Issue :
11
fYear :
2008
Firstpage :
5257
Lastpage :
5262
Abstract :
This correspondence derives bounds on the jamming capacity of a slotted ALOHA system. A system with n legitimate users, each with a Bernoulli arrival process is considered. Packets are temporarily stored at the corresponding user queues, and a slotted ALOHA strategy is used for packet transmissions over the shared channel. The scenario considered is that of a pair of illegitimate users that jam legitimate transmissions in order to communicate over the slotted ALOHA channel. Jamming leads to binary signaling between the illegitimate users, with packet collisions due to legitimate users treated as (multiplicative) noise in this channel. Further, the queueing dynamics at the legitimate users stochastically couples the jamming strategy used by the illegitimate users and the channel evolution. By considering various independent and identically distributed (i.i.d.) jamming strategies, achievable jamming rates over the slotted ALOHA channel are derived. Further, an upper bound on the jamming capacity over the class of all ergodic jamming policies is derived. These bounds are shown to be tight in the limit where the offered system load approaches unity.
Keywords :
access protocols; jamming; channel evolution; ergodic jamming policies; illegitimate users; jamming capacity; jamming strategies; slotted ALOHA channel; system load; Additive noise; Australia; Broadcasting; Couplings; Covariance matrix; Degradation; Feedback; Information theory; Interference; Jamming; ALOHA; covert channel; independent and identically distributed (i.i.d.) coding strategies;
fLanguage :
English
Journal_Title :
Information Theory, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9448
Type :
jour
DOI :
10.1109/TIT.2008.929965
Filename :
4655433
Link To Document :
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