DocumentCode :
762858
Title :
On the Economic Aspects of Downlink Scheduling in DS-CDMA Systems: Base-Station Density Perspective
Author :
Kim, Seong-Lyun ; Baek, Hyun-Mi
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Volume :
55
Issue :
5
fYear :
2006
Firstpage :
1594
Lastpage :
1602
Abstract :
Wireless systems have evolved into supporting nonreal-time data services. However, as the data rates for the services increase, the number of base stations per service area needs to expand, which leads to a high degree of base-station density. On the other hand, the so-called best effort resource management has been extensively studied for nonreal-time data services. One example of such efforts can be found in packet scheduling. The purpose of this paper is to investigate the economic impact of the downlink scheduling in terms of the base-station density. To this end, equations that can calculate the base-station density for the given quality of service (QoS) requirements such as outage probabilities, average data rates, and target Eb/Io were derived. Under specific QoS requirements on Rayleigh-fading channel environments, it is found that the one-by-one downlink scheduling (round-robin) requires about 50%-60% of the base stations required by the conventional simultaneous transmission. It was also found that this impact is almost the same as simply doubling the spectrum bandwidth for the simultaneous transmission. The base-station density is directly related to the infrastructure cost and thus may be translated into service prices. Therefore, the analysis in this paper provides a new insight into an economic aspect; how much the service prices for downloading the nonreal-time data would decrease with the introduction of packet scheduling in the code division multiple access downlink
Keywords :
Rayleigh channels; code division multiple access; data communication; quality of service; radio networks; scheduling; spread spectrum communication; telecommunication network management; DS-CDMA systems; Rayleigh-fading channel; average data rates; base-station density perspective; best effort resource management; code division multiple access downlink; economic aspects; nonreal-time data services; one-by-one downlink scheduling; outage probability; packet scheduling; quality of service requirements; round-robin downlink scheduling; service prices; simultaneous transmission; spectrum bandwidth; wireless systems; Base stations; Downlink; Environmental economics; Equations; Multiaccess communication; Probability; Quality of service; Rayleigh channels; Resource management; Scheduling algorithm; Base-station density; cellular radio system; direct-sequence code division multiple access (DS-CDMA); downlink; high data rate (HDR); high-speed downlink packet access (HSDPA); one by one; outage probability; packet scheduling;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2006.878602
Filename :
1703961
Link To Document :
بازگشت