Presentation	2003/8/15 Experiments on Reservation-Based Packet Transmission in Reverse Link CDMA Broadband Wireless Access Controlling Transmission-Power of Data Packet According to QoS Requirements Shingo Suwa, Motohiro Tanno, Kenichi Higuchi, Mamoru Sawahashi,
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Abstract(in English)	This paper proposed an efficient reservation-based packet transmission method, which adaptively controls the transmission-power offset Δ_ and the power ratio of pilot channel to data channel according to the Quality of Service (QoS) requirements transmitted by reservation packet and experimentally presents packet error rate (PER) performance in the reverse link for CDMA broadband wireless access. Experimental results using the CDMA transceiver with a 40-MHz bandwidth in the reverse link elucidated that when Δ_ is set to -2 dB, the total required average received signal energy per bit-to-background noise power spectrum density ratio (E_b/N_o) for satisfying error-free reception assuming non-real time traffic data was reduced by approximately 3 dB by applying Chase combining to the data packet compared to that with a constant Δ_ without retransmission in a four-path Rayleigh fading channel with the fading maximum Doppler frequency of 20 Hz. Furthermore, it was confirmed that in real time traffic data, for which the delay requirement was rigid, the required average residual packet error rate was achieved by controlling Δ_ according to the maximum allowable number of retransmissions, I.e., a few, within the delay requirement of each traffic data type.
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Keyword(in English)	broadband wireless access / reverse link / reservation packet / QoS control / packet combining
Paper #	RCS2003-127
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Committee	RCS
Conference Date	2003/8/15(1days)
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Paper Information
Registration To	Radio Communication Systems (RCS)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Experiments on Reservation-Based Packet Transmission in Reverse Link CDMA Broadband Wireless Access Controlling Transmission-Power of Data Packet According to QoS Requirements
Sub Title (in English)
Keyword(1)	broadband wireless access
Keyword(2)	reverse link
Keyword(3)	reservation packet
Keyword(4)	QoS control
Keyword(5)	packet combining
1st Author's Name	Shingo Suwa
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	Kenichi Higuchi
3rd Author's Affiliation	Wireless Laboratories, NTT DoCoMo, Inc.
4th Author's Name	Mamoru Sawahashi
4th Author's Affiliation	Wireless Laboratories, NTT DoCoMo, Inc.
Date	2003/8/15
Paper #	RCS2003-127
Volume (vol)	vol.103
Number (no)	254
Page	pp.pp.-
#Pages	6
Date of Issue