Submiss ion Doc: IEEE 802.15-09-0536-00- 004e July 2009 Wun-Cheol Jeong et al. Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Networks (WPANs) Submission Title: [MAC channel diversity over PHY-FH] Date Submitted: [July 14, 2009] Source: [Wun-Cheol Jeong, Chang-Sub Shin, Anseok Lee, Seong-Soon Joo] Address [] Voice:[+82-42-860-5104], FAX: [], E-Mail:[[email protected]] Re: [IEEE P802.15.4e] Abstract: [This document proposes MAC-FH over PHY-FH.] Purpose: [Discussion in 802.15.4e Task Group] Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
Transcript
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 1
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Abstract: [This document proposes MAC-FH over PHY-FH.]
Purpose: [Discussion in 802.15.4e Task Group]
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
MAC Channel Diversity vs PHY-FH• MAC channel diversity:
– Channel Adaptation: • Switch channels if necessary.
– Channel Hopping:• Switch (hop) channels over predefined pattern.
– A PPDU stays in a channel at least one slot duration.
• PHY-FH– Switch channels during Tx of PPDU.
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 6
Channel Hopping
Illustration of Channel Hopping over EGTS multi-superframe structure
Time
Channel CAP CFP
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 7
MAC-FH vs PHY-FH
Slot nSlot n-1Slot n-2 Slot n+1 Slot n+2
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Sub Slot nSub Slot n-1Sub Slot n-2 Sub Slot n+1 Sub Slot n+2
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PPDU
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Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 8
MAC Channel Diversity vs PHY-FH• If PHY-FH generates set of physical channels for
Tx of a PPDU, say length of m, MAC shall see m orthogonal logical channels.
• Same channel diversity can be applied using these logical channels to obtain diversity gain.
• Set of PHY-FH sequences can be generated by LUT method or pseudo random method like polynomial-based generator (or other method that PHY suggests). However, logical channel shall indicate unique set of physical channels.
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 9
MAC Channel Diversity vs PHY-FH• Cooperation between MAC Channel Diversity
and PHY-FH:– MAC Channel Diversity shall manage
communication channel using logical channel, not physical channels.
– MAC shall set logical channel numbers to PHY for channels to be used for Tx of a PPDU.
– Generate PHY-FH sequence based on logical channel number.
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 10
MAC Channel Diversity vs PHY-FH• Logical Channel: A channel seen at
MAC layer. It may consist of set of physical channels.
• For frequency hopping, 15.4-2006 MAC sublayer have to use two primitives at every time slot for frequency hopping.
– First, change the currentChannel using PLME-SET.request– Second, transmit data using PD-DATA.request
• Propose adding new parameter of PD-DATA.request primitve for frequency hopping
PLME-SET.request(channel)PD-DATA.request(data)
PD-DATA.request(channel, data)
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 13
Suggestion for supporting PHY-FH
• Primitives– PD-DATA.request (
hoppingMode,
logicalChannelNum,
psduLength,
psdu
)
Name Type Range Description
hoppingMode Boolean True or False Indication of whether the PHY sublayer has Hoppingenabled.A value of TRUE indicates that hopping is enabled, whilea value of FALSE indicates that hopping is disabled and logicalChannelNum is ignored.
logicalChannelNum Integer ? The logical channel number of phy hopping sequenceThis value is set by MAC sublayer at every MAC time slot
Submission
Doc: IEEE 802.15-09-0536-00-004eJuly 2009
Wun-Cheol Jeong et al.Slide 14
Suggestion for supporting PHY-FH• PHY PIB
• New Channel page and channel number need to be defined for TG4g PHY
Attribute Type Range Description
phyHoppingMode Boolean True or False
Indication of whether the PHY sublayer has Hoppingenabled.A value of TRUE indicates that hopping is enabled, whilea value of FALSE indicates that hopping is disabled.
