TY - GEN
T1 - RACH performance improvement with randomized access preamble
AU - Zhou, Lei
AU - Yao, Yu Dong
AU - Heffes, Harry
AU - Zhang, Ruifeng
PY - 2002
Y1 - 2002
N2 - An improved random access channel (RACH) scheme is proposed. The scheme randomizes the access preamble sequences by modulating random numbers chosen by accessing users. The random number is sent back from a base station together with an acknowledgment sequence, again through modulation. Only the users whose access preamble is acknowledged and random number coincides the one sent back together with the acknowledgment get access to the message channel. This way, the probability of collisions is greatly reduced. Since the length of preamble and acknowledgment sequences allows modulations of quite large random numbers, the probability of two or more users happen to choose the same access preamble signature and the same modulated random number is practically negligible. It is shown in the simulation that the proposed scheme offers better performance than another improved packet access scheme common packet channel (CPCH).
AB - An improved random access channel (RACH) scheme is proposed. The scheme randomizes the access preamble sequences by modulating random numbers chosen by accessing users. The random number is sent back from a base station together with an acknowledgment sequence, again through modulation. Only the users whose access preamble is acknowledged and random number coincides the one sent back together with the acknowledgment get access to the message channel. This way, the probability of collisions is greatly reduced. Since the length of preamble and acknowledgment sequences allows modulations of quite large random numbers, the probability of two or more users happen to choose the same access preamble signature and the same modulated random number is practically negligible. It is shown in the simulation that the proposed scheme offers better performance than another improved packet access scheme common packet channel (CPCH).
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M3 - Conference contribution
AN - SCOPUS:0141621170
SN - 7505377027
T3 - Proceedings of the International Conference on Telecommunications
SP - 312
EP - 316
BT - Proceedings of the International Conference on Telecommunications
A2 - Yuan'an, L.
A2 - Yuan'an, L.
T2 - Proceedings of the International Conference on Telecommunications 2002
Y2 - 23 June 2002 through 26 June 2002
ER -