1 / 14

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

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)‏ Submission Title: [Common Mode Signaling (CMS) for Intersystem Coexistence Enhancement] Date Submitted: [8 March 2009]

candida
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Shu Kato Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)‏ Submission Title: [Common Mode Signaling (CMS) for Intersystem Coexistence Enhancement] Date Submitted: [8 March 2009] Source: [S. Kato, C.S. Sum, T. Baykas, Z. Lan, J. Wang, R. Funada, M.A. Rahman, C.W. Pyo, H. Harada, I. Lakkisa,] Company [NICT, Tensorcoma] Address [3-4, Hikarino-oka, Yokosuka, 239-0847, Japan] Voice: [], FAX: [+81-46-847-5440], E-Mail: [shu.kato@nict.go.jp] Re: [] Abstract: [Intersystem coexistence enhancement by using common mode signaling ] Purpose: [This document provides a solution for intersystem coexistence] 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.

  2. Shu Kato High Level Summary • The Common Mode Signaling (CMS): specified to enhance intersystem coexistence in the IEEE 802.15.3c (TG3c) system design by transmitting and receiving a specific frame (synch frame) with much higher detection capability than “energy detection” in very low C/N environments • The outline of this document: • Two important items for coexistence • Overview on TG3c system design • The importance of intersystem coexistence • What is CMS • How does CMS enhance intersystem coexistence • CMS frame format • Design specifications of CMS • CMS performances • TG3c-Tgad coexistence using CMS

  3. Shu Kato Two Important Items for Coexistence • Channelization i. The same channelization: must for better coexistence of multiple systems in the same frequency band ii. 802.15.3c adopts a channelization of “4 channels over 9 GHz” and this has been accepted by WirelessHD and adopted by ECMA as well – better to use the same channelization as specified by TG3c • “In-use channel “ detection capability i. Proposing “in-use channel detection by a specific frame transmission and detection” – Common Mode Signaling (CMS) transmission and reception ii. “In-use channel detection” by CMS transmission and reception: much better sensitivity than “energy detection”

  4. TG3c Channel Plan 2160 MHz 1728 MHz 120 MHz 240 MHz 1 2 3 4 57 58 59 60 61 62 63 64 65 66 fGHz • Support Cell phone XTAL: 19.2 MHz & 26 MHz & Other High frequency XTALs: 54MHz, 60MHz, 108MHz, … • Balanced margins to 57/66 GHz & Good roll-off factor • Supports Multiple PLL Architectures with the Cell phone XTAL • Dual PLL: High frequency PLL that generates carrier frequencies • Low frequency PLL that generates ADC/DAC & ASIC frequencies 4 4

  5. Common Mode Signaling (Simple Single Carrier bridging different air interfaces) • All PNC capable devices regardless PHY, shall support CMS, Synch frame transmission and reception capability • CMS: to enhance coexistence of different air interfaces which will be best suite to separate market segments • CMS: simple single carrier (p/2 BPSK with Reed Solomon as FEC) for robust and longer transmission range Common Mode Signaling Single Carrier PNC (DEVs) OFDM (PNC) CMS: Single Carrier Beacon (p/2 BPSK with RS as FEC)

  6. Shu Kato Overview on TG3c System Design • One unified MAC • Three PHYs optimized for respective and specific market segments • Single carrier (SC) PHY • low complexity, low power consumption and low cost • handheld mobile applications • High speed interface (HSI) PHY - OFDM • low latency bi-directional data communications • PC peripherals • AV PHY - OFDM • optimized for high speed uncompressed video transmission • Audio/visual consumer electronics (CE) applications

  7. Shu Kato The Importance of Intersystem Coexistence • Multiple PHY modes are specified in the TG3c system to address respective application and market segments • If these PHY modes do not recognize each other, they may interfere mutually and the overall performance will be degraded • All PHY modes compliant to the TG3c system design shall not interfere with each other • CMS is a signaling scheme specified to facilitate enhanced intersystem coexistence within the TG3c system

  8. Shu Kato What is CMS • CMS is a low data rate single carrier (SC) signal specified for intersystem coexistence purposes • The CMS is used for SC PHY transmission of • Beacon frame and sync frame • Command frame and training sequence in beam forming • Several rules are specified for the usage of CMS to enhance intersystem coexistence

  9. Shu Kato How does CMS enhance Intersystem Coexistence • The below rules on CMS usage are specified in the TG3c draft: • An AV or an HSI PNC shall send a CMS sync frame in every superframe • An AV or an HSI PNC shall be able to receive the CMS sync frame • An SC PNC shall send CMS beacon in every superframe • All SC DEV shall be able to send and receive signal in CMS • The specified rules indicate that all PHY modes are able to communicate with / detect each other using a commonly supported signaling scheme • Any new PNC seeking to start a piconet, shall initially perform channel scan. Upon receiving CMS beacon/sync frame from an already-active PNC, this new PNC will be aware of its existence and shall avoid interfering signal transmission

  10. Shu Kato CMS frame format CES 6 repetition of Golay code length 512 + Golay code length 128 SFD 4 repetition of Golay code length 512 RS parity bits 16 octets HCS 2 octets MAC header 10 octets Payload Frame header PHY preamble PHY header 5 octets SYNC 128 repetition of Golay code length 128 SYNC – Synchronization SFD – Start frame delimiter CES – Channel estimation sequence HCS – Header check sequence RS – Reed-Solomon

  11. Shu Kato Design specifications of CMS • Preamble • Total duration ~12.6us: SYNC ~9.5us, SFD ~1.2us, CES ~1.9us • Spreading: 128 • Modulation: p/2-shift BPSK • Header • Forward error correction: Reed-Solomon (33,17) • Spreading: 64 • Modulation: p/2-shift BPSK • Header rate: 12.3 Mbps • Payload • Forward error correction: Reed-Solomon (255,239) • Spreading: 64 • Modulation: p/2-shift BPSK • Data rate: 25.3 Mbps

  12. Shu Kato CMS Performance The CMS is capable of achieving transmission range of 32.8m in AWGN channel and 10.3m in residential NLOS environment (CM2.3)

  13. Shu Kato TG3c-TGad Coexistence using CMS • The intersystem coexistence using CMS has the potential to be extended beyond coexistence for multiple PHY modes within TG3c system • Other systems occupying the same frequency band (e.g. TGad system) may also utilize the CMS to further enhance the coexistence capability for a more harmonized communication environment

  14. Shu Kato Conclusion • The enhanced intersystem coexistence mechanism using CMS in TG3c system is described • CMS realizes intersystem co-existence much better than the conventional detect and avoid (DAA) technology based on energy detection • CMS is a good candidate for harmonized multiple system coexistence in the same frequency band, 60 GHz

More Related