Title :
Comment on `An Efficient Random Access Scheme for OFDMA Systems with Implicit Message Transmission´
Author :
Chia-Hung Wei ; Ping-Chen Lin ; Ray-Guang Cheng
Author_Institution :
Dept. of Electron. & Comput. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
In [1], the throughput and access delay performance of the RACH in an orthogonal frequency division multiple access (OFDMA) system is analyzed. However, the analysis of access delay is incorrect. This note corrects the original equations and results show that the new equations correct the non-negligible error of the average access delay under the uniform backoff policy.
Keywords :
data communication; frequency division multiple access; OFDMA system; RACH; access delay performance; efficient random access scheme; implicit message transmission; orthogonal frequency division multiple access system; random access channel; uniform backoff policy; Delay; Equations; Indexes; OFDM; Random variables; Throughput; Wireless communication; Access delay; binary exponential backoff; uniform backoff;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2012.112012.120872
