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:[+81 468475104], FAX: [:[+81 468475431], E-Mail:[lee@nict.go.jp] 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 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. Li, Hernandez, Dotlić, Miura (NICT)

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

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> The current structure of channel scan in the draft 5.1.2.1 Channel Scanning 5.1.2.1.1 General description 5.1.2.1.2 ED channel scan 5.1.2.1.3 Active and passive channel scan <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> 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 <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> 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 5.1.2.1.3 Active and passive channel scan <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> 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. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> 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. <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> 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 <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Questions? <author>, <company>