| Presentation | 2002/11/15 Random Access Channel Transmission Utilizing Soft-Combining of Retransmitted Message Packets for Broadband Multicarrier/DS-CDMA Yousuke Iizuka, Motohiro Tanno, Mamoru Sawahashi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes an efficient random access channel (RACH) transmission method that utilizes soft-combining of retransmitted message data packets according to the Quality of Service (QoS) requirements transmitted by preamble in the reverse link broadband multicarrier/DS-CDMA(MC/DS-CDMA). In the proposed scheme, the relative transmission power of a message data packet from that of a successfully detected preamble for non-real time (NRT) traffic data is significantly reduced by soft-combining several retransmitted message data packets thanks to time diversity since the delay requirement is relaxed. Meanwhile, for real time (RT) traffic data, the relative transmission power of the message data packet from that of the detected preamble is increased so as to reduce the packet error rate with a limited number of retransmissions. Simulation results elucidate that the total required average received signal energy per bit-to-background noise power spectrum density ratio (E_b/N_0) for error-free transmission with time diversity for NRT traffic data is reduced by approximately 2.4 dB compared to that for RT traffic data in a 12-path fading channel with exponential distribution at the fading maximum Doppler frequency off_D = 20 Hz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | broadband packet wireless access / reverse link / MC/DS-CDMA / random access / QoS control / packet combining |
| Paper # | RCS2002-195 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2002/11/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Random Access Channel Transmission Utilizing Soft-Combining of Retransmitted Message Packets for Broadband Multicarrier/DS-CDMA |
| Sub Title (in English) | |
| Keyword(1) | broadband packet wireless access |
| Keyword(2) | reverse link |
| Keyword(3) | MC/DS-CDMA |
| Keyword(4) | random access |
| Keyword(5) | QoS control |
| Keyword(6) | packet combining |
| 1st Author's Name | Yousuke Iizuka |
| 1st Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc.() |
| 2nd Author's Name | Motohiro Tanno |
| 2nd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 3rd Author's Name | Mamoru Sawahashi |
| 3rd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| Date | 2002/11/15 |
| Paper # | RCS2002-195 |
| Volume (vol) | vol.102 |
| Number (no) | 465 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |