Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/586500
Title: TiM: Fine-Grained Rate Adaptation in WLANs
Authors: Guanhua Wang;Shanfeng Zhang;Kaishun Wu;Qian Zhang;Lionel M. Ni
subject: Adapting Interpolation Rate,;Rate Adaptation;Modulation Scheme
Year: 2016
Publisher: IEEE
Abstract: Channel condition varies frequently in wireless networks. To achieve good performance, devices need rate adaptation. In rate adaptation, choosing proper modulation schemes based on channel conditions is vital to the transmission performance. However, due to the natural character of discrete modulation types and continuous varied link conditions, we cannot make a one-to-one mapping from modulation schemes to channel conditions. This matching gap causes either over-select or under-select modulation schemes which limits throughput performance. To fill-in the gap, we propose time-line modulation (TiM), a novel three-Dimensional modulation scheme by adding time dimension into current amplitude-phase domain schemes. With estimation of channel condition, TiM changes base-band data transmission time by artificially interpolating values between original data points without changing amplitude-phase domain modulation type. We implemented TiM on USRP2 and conducted comprehensive simulations. Results show that, compared with rate adaptation choosing from traditional modulation schemes, TiM can improve channel utilization up to 200 percent.
Description: 
URI: http://localhost/handle/Hannan/180242
http://localhost/handle/Hannan/586500
ISSN: 1536-1233
volume: 15
issue: 3
Appears in Collections:2016

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Title: TiM: Fine-Grained Rate Adaptation in WLANs
Authors: Guanhua Wang;Shanfeng Zhang;Kaishun Wu;Qian Zhang;Lionel M. Ni
subject: Adapting Interpolation Rate,;Rate Adaptation;Modulation Scheme
Year: 2016
Publisher: IEEE
Abstract: Channel condition varies frequently in wireless networks. To achieve good performance, devices need rate adaptation. In rate adaptation, choosing proper modulation schemes based on channel conditions is vital to the transmission performance. However, due to the natural character of discrete modulation types and continuous varied link conditions, we cannot make a one-to-one mapping from modulation schemes to channel conditions. This matching gap causes either over-select or under-select modulation schemes which limits throughput performance. To fill-in the gap, we propose time-line modulation (TiM), a novel three-Dimensional modulation scheme by adding time dimension into current amplitude-phase domain schemes. With estimation of channel condition, TiM changes base-band data transmission time by artificially interpolating values between original data points without changing amplitude-phase domain modulation type. We implemented TiM on USRP2 and conducted comprehensive simulations. Results show that, compared with rate adaptation choosing from traditional modulation schemes, TiM can improve channel utilization up to 200 percent.
Description: 
URI: http://localhost/handle/Hannan/180242
http://localhost/handle/Hannan/586500
ISSN: 1536-1233
volume: 15
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7084168.pdf2.16 MBAdobe PDFThumbnail
Preview File
Title: TiM: Fine-Grained Rate Adaptation in WLANs
Authors: Guanhua Wang;Shanfeng Zhang;Kaishun Wu;Qian Zhang;Lionel M. Ni
subject: Adapting Interpolation Rate,;Rate Adaptation;Modulation Scheme
Year: 2016
Publisher: IEEE
Abstract: Channel condition varies frequently in wireless networks. To achieve good performance, devices need rate adaptation. In rate adaptation, choosing proper modulation schemes based on channel conditions is vital to the transmission performance. However, due to the natural character of discrete modulation types and continuous varied link conditions, we cannot make a one-to-one mapping from modulation schemes to channel conditions. This matching gap causes either over-select or under-select modulation schemes which limits throughput performance. To fill-in the gap, we propose time-line modulation (TiM), a novel three-Dimensional modulation scheme by adding time dimension into current amplitude-phase domain schemes. With estimation of channel condition, TiM changes base-band data transmission time by artificially interpolating values between original data points without changing amplitude-phase domain modulation type. We implemented TiM on USRP2 and conducted comprehensive simulations. Results show that, compared with rate adaptation choosing from traditional modulation schemes, TiM can improve channel utilization up to 200 percent.
Description: 
URI: http://localhost/handle/Hannan/180242
http://localhost/handle/Hannan/586500
ISSN: 1536-1233
volume: 15
issue: 3
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7084168.pdf2.16 MBAdobe PDFThumbnail
Preview File