Standardization on Home NW in ITU-T T SG15

Transcription

1 S2-1. Standardization on Home NW in ITU-T T SG15 March 7, 2011 NTT Advanced Technology Corp. Yoshihiro Kondo Copyright 2010 NTT Advanced Technology Corporation

2 Outline Overview of Home NW in Q4/SG15 G.hn (G.9960, G.9961, G.9972) G.hnem (G.9955, G.9956) EMC related Issues Summary 1

3 Overview of Home NW in Q4/SG15 2

4 SG15 Study Group Structure SG15: Optical transport networks and access network infrastructures WP1/SG15 is developing Higher speed metallic and optical access technologies Home network technologies with energy management Q.1 Q.2 Q.4 Title WP1: Transport aspects of Access networks and home networking Coordination of Access Network Transport standards Optical systems for fibre access networks Transceivers for customer access and in-premises networking systems on metallic conductors WP2: Optical access/transport network technologies and physical infrastructures WP3: Transport network structures HN Architecture Study Items B-PON G-PON Point to Point ADSL, VDSL, HN systems (e.g., PLC) 3

5 Works in Progress Broad band home networking transceivers G.hn recommendations (G.9960, G.9961, G.9972) G.hn-mimo recommendation (G.9963) Narrow band home networking transceivers G.hnem recommendations (G.9955, G.9956) - Home networking Aspects on energy management Wireless narrow band transceivers G.wnb started at February 2011 SG15 meeting - Target for a wireless narrow band communication for Smart Home applications - Cooperation with ITU-R DSL related transceivers 4

6 Current Status of Home NW Related Recommendations in Q.4/SG15 G.hn Standardization work started in April, Basic Recommendations completed in June, 2010; G.9960, G.9961 and G.9972 G.hnem (narrowband OFDM power line communications transceivers) PHY consented in Feb G.hn-MIMO (MIMO transceivers over the three powerline conductors) in progress G.9960 G.9961 G.9972 Dec., 2008 Consent G.9960 Cor. G.9960 Amd. Oct., 2009 Approval Jan., 2010 Oct., 2009 Consent G.hnem Consent Jan., 2010 Consent Jan., 2010 Consent June, 2010 Approval Approval June, 2010 Approval G.9961 Cor.1 G.9961 Amd.1 June, 2010 Approval G.hn-MIMO Approval of Integrated version Feb., 2011 Consent Feb., 2011 Consent (Multicast, Neighboring Domain Interference Mitigation) Feb., 2011 PHY/ DLL Consent Interim SG15 SG15 5

7 G.hn (G.9960, G.9961, G.9972) 6

8 What is G.hn? Next Generation Home Networking Transceivers Recommendations OFDM modulation Transmission bit rate of 1 Gb/s QoS Necessary for triple-play residential services as well as business-type services delivered over xdsl, PON, or other access technologies System architecture, PHY, and DLL specification for wireline based networking transceivers Capable of operating over premises wiring including inside telephone wiring, coaxial cable, and power-line wiring Higher throughput and more reliability compared to existing technologies Wider bandwidth, Medium access base on MAP (Medium Access Plan), Efficient FEC, Retransmission MAP: periodic message transmitted by the domain master to indicate media access plan Security Mechanism AES128, P2P, advanced authentication and secure admission of nodes into a domain Migration path from existing technologies for power line medium G.9972(Co-existence of Home Networking implementations ) 7

9 Architecture Reference Model Domain contains nodes connected to the same medium. Nodes connected to different domains communicate via inter-domain bridges. Capable of supporting at least 32 registered nodes (optionally support up to 250) per domain. Scope limited to transceivers of all nodes including domain master. Any medium Alien domain Alien domain Any medium Bridge to alien domain (not in scope) Inter-domain bridge (logical function) Bridge to alien domain (not in scope) Inter-domain bridge (logical function) Inter-domain bridge (logical function) Domain 1 Node Node Domain 2 Node Node Domain S Node Node Node Domain Master Node Node Domain Master Node Domain Master Global Master (logical function) 8

10 G.hn Protocol reference model With the different configuration settings, PCS and PMA have the same functionality over different media In PMD, OFDM modulation is used with optimized configuration parameters for different media. PMD may include medium-dependent adaptors for different media, including frequency shifting for passband transmission. Interface with the application entity Data rate adaptation Responsible for establishing, managing, resetting and terminating all connections of the node Specified in G.9961 Medium access control Data rate adaptation MPDU Encapsulation into the PHY frame Specified in G.9960 PHY frame encoding PHY frame modulation/ demodulation using OFDM 9

11 G.hn Bandplans Bandplan for JAPAN RF bandplan - coax; Annex C (Fc = 400 MHz-2900 MHz, step 50MHz) 200 MHz-RF Fc 1024(# of sub carriers) X Baseband bandplan (power line) 25MHz-B (# of sub carriers) Deletion of 100MHz Bandplan (Passband) Deletion of 100MHz Bandplan (Passband) Low complexity mode (Used for Smart Grid application) Reference: G.hn: The New ITU-T Home Networking Standard, IEEE Commun. Mag., October

12 Coexistence G.9972 specifies a coexistence mechanism for home networking transceivers capable of operating over powerline wiring Inter-System Protocol (ISP) allows for the power line medium to be shared between Coexisting Systems in TDM, FDM, or both. ISP supports coexistence between up to four non-interoperable Coexisting Systems. IEEE 1901 Access System IEEE 1901 in-home System (HD-PLC based) IEEE 1901 In-home System (HomePlug based) G.hn Based System G.9972 defines ISP related specifications Allocation of resources to each Coexisting System Start-up, synchronization and resynchronization procedures 11

13 G.hnem (G.9955, G.9956) 12

14 What is G.hnem? PHY and DLL Specifications for narrowband OFDM power line communications transceivers over frequencies below 500 khz. Supports indoor and outdoor communications over low voltages lines and medium voltages lines. G.hnem addresses the following applications: Grid to utility meter applications Advanced metering infrastructure (AMI) Electric vehicle to charging station scenarios Home automation scenarios Home area networking (HAN) communications scenario Other Smart Grid applications G.hnem PHY (G.9955) specifies Section 1 in the Main body: Network architecture and reference models Section 7 in the Main body: Physical layer (PHY) specification Annex A: G3 Power Line Communications PHY Annex B: PRIME Power Line Communications PHY Annex C: Mode of operation charging electrical vehicles Annex D: FCC Extension to G3 Annex A 13

15 HAN based on G.hnem Home area networking (HAN) communications scenario Contains G.hnem domain Contains an alien domain Non-G.hnem narrow band NW Alien domains bridged to the G.hnem domains using L3 bridges Nodes in the G.hnem domain include: EVSE (Electric Vehicle Supply Equipment) In-home energy management system (EMS) Smart Appliance PCT (Programmable Control Thermostat)

16 Table 7-19/G.9955 Parameters for CENELEC-A bandplan Notation F START F END Value khz khz Note Lowest frequency of CENELEC-A bandplan (subcarrier number 23) Highest frequency of CENELEC-A bandplan (subcarrier number 58) Table 7-20/G.9955 Parameters for CENELEC-B bandplan Notation F START F END G.hnem: Bandplans (1/2) Value khz khz Note Lowest frequency of CENELEC-B bandplan (subcarrier number 63) Highest frequency of CENELEC-B bandplan (subcarrier number 79) Table 7-21/G.9955 Parameters for CENELEC-CD bandplan Notation F START F END Value 125 khz khz Note Lowest frequency of CENELEC-CD bandplan (subcarrier number 80) Highest frequency of CENELEC-CD bandplan (subcarrier number 92)

17 Table 7-YY/G.9955 Parameters for FCC-1 bandplan Notation F START F END Value khz khz Note Lowest frequency of FCC bandplan (subcarrier number 11) Highest frequency of FCC bandplan (subcarrier number 44) Table 7-XX/G.9955 Parameters for FCC-2 bandplan Notation F START F END G.hnem: Bandplans (2/2) Table 7-23/G.9955 Parameters for FCC bandplan Notation F START F END Value khz khz Value 150 khz khz Note Lowest frequency of FCC bandplan (subcarrier number 11) Highest frequency of FCC bandplan (subcarrier number 153) Note Lowest frequency of FCC bandplan (subcarrier number 48) Highest frequency of FCC bandplan (subcarrier number 153)

18 EMC Related Issues 17

19 Modifications in the Approved G.9960 at the SG15 in June, 2010 Resolutions agreed for EMC issues of G.9960 over PLC Deletion of 100 MHz bandplan (for passband) As for 100 MHz bandplan (for baseband), from 80 to 100 MHz band masked as a default configuration. PSD measurement clarified (rms based, not quasi-peak) As for 50 MHz bandplan (for baseband) and 100 MHz bandplan (for baseband), max transmission power reduced from 22.5 dbm to 20 dbm. For International amateur radio bands, frequency range considered broaden from 0 to 100M Hz. (Prior to this modification, range considered was from 0 to 30 MHz.) In the Appendix, the following information added: International broadcast bands Aeronautical mobile bands Radio astronomy bands Agreed to develop dynamic notching capability 18

20 G.hn Annex C Specifications for the usage in Japan All nodes over power lines shall comply with national regulations in Japan [Radio Regulatory Laws enforcement regulations] the frequency band that one can use without any license is restricted to between 2 MHz and 30 MHz the interference level due to power-line communication is also restricted Through experiments and evaluations, Japan set these regulations that are not the same as the description of the usage of powerline communications is only limited inside buildings and not allowed outside buildings 19

21 The latest liaison from ITU-R Latest Liaison from ITU-R Source: ITU-R WP1A PLT Rapporteur Group Output from the meeting held in January 2011 Impact of PLT Systems on Radiocommunication systems operating in the VHF and UHF bands above 80 MHZ preliminary draft new Report ITU R [PLT + 80 MHZ] agreed in this Rapporteur Group. This document includes the followings; Descriptions of services in the range of MHz band Detailed explanations for notching Several PSD mask control tools specified in G.hn According to the liaison, this document will be updated so as to include further necessary information. Invitation to the joint meeting for ITU-R WP 1A meeting in May There is a plan to have a joint session during the week of May 23 when Q4/SG15 has a Rapporteur meeting. PLT workshop on May 27, 2011 at Geneva - ITU Forum on Technical Compatibility between Power Line Telecommunication systems (PLT) and Radiocommunication Services 20

22 Transmit power control in G.9960 Tools to control transmit power of G.hn devices (nodes) in the network (domain). Allow a node to meet various regulations (e.g., CISPR, CENELEC) as well as power consumption requirements (e.g., European Code of Conduct). The upper effective frequency limit in G set to 80 MHz (aligned with Report ITU-R SM. 2158). The toolkit in principle also applicable to prevent or eliminate interference, if frequencies above 80 MHz are used A node is not allowed to transmit signals above the transmit PSD mask (TxPSD). 21

23 Tools of setting the transmit PSD mask (TxPSD) Limit PSD Mask (LPM): PSD mask defined for each bandplan LPM defines the absolute PSD limit that reflects the maximum allowable limit Regional PSD Mask (RPM): PSD mask defined for each bandplan for each region Sub-carrier Mask (SM): Masked bands defined for a given LPM or RPM SM denotes frequency notching. The domain master can specify up to 32 masked bands. PSD Shaping Mask (PSM): PSD breakpoints defined for a given LPM or RPM The domain master can specify up to 32 PSD breakpoints International Amateur Radio Bands The domain master can notch one or more of the Amateur Radio bands in 0 to 100 MHz range. PSD ceiling PSD ceiling (PSDC) denotes the ceiling of the PSD value applied to signals transmitted between nodes. 22

24 Transmit PSD mask and PSD ceiling The transmit PSD mask (TxPSD) is constructed by several toolkits as shown below. 23

25 Summary Overview of Home NW in Q4/SG15 G.hn, G.hnem, G.hn-mimo, G.wnb G.hn (G.9960, G.9961, G.9972) Architecture, Reference model, Bandplans, Coexistence G.hnem (G.9955, G.9956) Application to HAN, Bandplans EMC related Issues Liaisons from ITU-R, Annex C for Japanese case, Preliminary draft new report ITU-R [PLT + 80 MHz], Tools for transmit power control in G