Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Fast Uplink Channel Allocation] Date Submitted: [January 14, 2008] Source: [Yongsun Kim, Wooyong Lee, Jinkyeong Kim, Kyeongpyo Kim, Hyoungjin Kwon] Company: [Electronics and Telecommunications Research Institute(ETRI)] Address: [ETRI, 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-700, Republic of Korea] Voice: [], FAX: [], E-Mail: [doori@etri.re.kr, wylee@etri.re.kr, jkkim@etri.re.kr, kpkim@etri.re.kr, kwonjin@etri.re.kr] Re: [] Abstract: [Descriptionon Fast Uplink Channel Allocation scheme] Purpose: [To be considered in IEEE 802.15.3c standard] 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. ETRI

2. Video streaming is asymmetric point-to-point application in that the source (DVD player, set top box and so on) tends to transmit video streaming data to the sink (flat TV) one-sidedly. In this case, it is difficult for the sink to transmit control signals, ACK or user data to the sources immediately. Vertical blanking interval (VBI) is long enough but not frequently exists while horizontal blanking interval (HBI) is too short but frequently exists. For immediate uplink usage, we want to propose fast uplink channel allocation scheme to use aggregated HBIs. For example, the figure below shows one HBI is not enough for RF switching from TX to RX or RX to TX. (Sink) (Source) Why Fast Uplink Channel Allocation? ETRI

3. Various Hsync and Vsync ETRI

4. Transmission in video signals • In general mode of video transmission systems, horizontal blanking interval and active video line come alternatively. • In aggregation mode, we aggregate numbers of horizontal blanking intervals (HBI) and active lines (AL). (Before combined AL) (After combined AL) ETRI

5. FUCA MAP and Control Frame Format • Position of combined HBI • “0” : Before combined AL/ “1” : After combined AL • Attribute of HBI • “0” : No auxiliary data/ “1” : Auxiliary data • Maximum number of aggregated HBI : 8 FUCA MAP Format FUCA Control Frame Format ETRI

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8. Example of Aggregation Mode (1/4) • In case, there is no auxiliary data in any horizontal blanking intervals. • We can use combined HBI for transmitting uplink control/data. Pos : 0 Number of Aggregated Data : 5 HBI OA : E1-E2-E3-E4-E5 ETRI

9. Example of Aggregation Mode (2/4) • In case, there is one horizontal blanking interval that has auxiliary data. • We can also use combined HBI for transmitting uplink control/data. Pos : 0 Number of Aggregated Data : 5 HBI OA : E1-E2-E4-E5-A3 ETRI

10. Example of Aggregation Mode (3/4) • It is same to last slide but combined HBI comes after combined AL. • We can also use combined HBI for transmitting uplink control/data. Pos : 1 Number of Aggregated Data : 5 HBI OA : A3-E1-E2-E4-E5 ETRI

11. Example of Aggregation Mode (4/4) • In case, there are three horizontal blanking intervals that have auxiliary data. • So we can not use combined HBI for transmitting uplink control/data because that is too short. Pos : 0 Number of Aggregated Data : 5 HBI OA : E1-E4-A2-A3-A5 In case of 1080p ETRI

12. Benefit of PHY Transmission Using Aggregation • Generally, PHY transmits MAC MPDU with Preamble. • If we do not aggregate auxiliary data together, we need to transmit 3 PHY frames as shown below. • If we do aggregate auxiliary data together, we transmit only one PHY frame as shown below. So the transmission efficiency is increased compared to the case above. ETRI