1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Suggested changes for channel scan and scan related primitives]
Date Submitted: [March 2016]
Source: [Huan-Bang Li, Marco Hernandez, Igor Dotlic, and Ryu Miura] Company [NICT]
Address [3-4 Hikarino-oka, Yokosuka, Kanagawa, Japan]
Voice:[ ], FAX: [:[ ],
Re: [Contribution to 15.8 PAC draft]
Abstract: [Proposal of changes for channel scan and channel scan related primitives]
Purpose: [This document is to provide a MAC mechanism]
Notice: This document has been prepared to assist the IEEE P 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 P
Li, Hernandez, Dotlić, Miura (NICT)

2. Suggested changes for channel scan and scan related primitives
March, 2016
Li, Hernandez, Dotlić, Miura (NICT)

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The current structure of channel scan in the draft
Channel Scanning
General description
ED channel scan
Active and passive channel scan
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Discussion During the Teleconference on March 9
Active scan in 15.4 is used by a device to send beacon request for extracting the beacon from a coordinator.
Passive scan in 15.4 is used for extracting the beacon from a coordinator without transmitting beacon request.
In 15.8, the above functions are conducted with either synchronization procedure or discovery procedure. Some are not required functions.
Redundancy or overlap in functions
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Proposed Solutions (1)
Restrict the scanning procedure to only performing the function of finding proper channels. Leave other functions to synchronization and/or discovery procedures.
The restricted function can be done with ED channel scan.
Delete Active and passive channel scan
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Proposed Solutions (2)
Modify parameters of MLME-SCAN.request
Table 48—MLME-SCAN.request parameters
Property
Type
Valid range
Description
ScanType
Enumeration
ED, ACTIVE, PASS IVE.
Indicates the type of s can performed.
ChannelPage
Integer
Any valid channel p age as indicated in Table TBD
The channel page on w hich to perform the sca n.
ScanChannels
Array of integers
Any valid channel n umber as indicated in Table TBD
The channel numbers t o be scanned
ScanDuration
TBD
A value used to calcula te the length of time to spend scanning each c hannel for ED, active, a nd passive scans.
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Proposed Solutions (3)
Modify parameters of MLME-SCAN.confirm
Table 49—MLME-SCAN.confirm parameters
Property
Type
Valid range
Description
Status
Enumeration
SUCCESS, LIMIT_REAC HED, SCAN_IN_PROGRE SS, FRAME_TOO_LONG, INVALID_PARAMETER
The status of the scan request.
ScanType
ED, ACTIVE, PASSIVE
Indicates the type of scan performed
UnscannedCh annels
Array of integ ers
Any valid channel number as defined in Table TBD
A list of the channels given in the request which were not scanned. This parameter i s not valid for ED scans
ResultListSize
Integer
Implementation specific
The number of elements returned in EnergyDetectList.
EnergyDetect List
0 to 255 per element in th e array.
The list of energy measurements, one for each channel searched during an ED sca n. This parameter is null for active, passiv e scans.
DetectedCate gory
0 to 2
Categorization of energy detection with th e following values:
0: Category detection is not supported
1: UWB PHY detected
2: Non-UWB PHY signal source detected.
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Proposed Solutions (4)
ScanDuration in 15.4
Suggested ScanDuration for 15.8
an ED measurement for [aBaseSuperframeDuration × (2n + 1)], where n is the value of the ScanDuration parameter
an ED measurement for a length of five consecutive superframes.
This is the same length as defined condition for resynchronization
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Questions?
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