1、 ETSI TR 102 494 V1.1.1 (2005-06)Technical Report PowerLine Telecommunications (PLT)Technical requirements for In-House PLC modemsETSI ETSI TR 102 494 V1.1.1 (2005-06) 2 Reference DTR/PLT-00017 Keywords modem, powerline, transmission ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANC
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6、uction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Memb
7、ers. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 102 494 V1.1.1 (2005-06) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 5 2 References 5 3 Definitions, symbols and abbreviations .5 3.1 Def
8、initions5 3.2 Symbols5 3.3 Abbreviations .5 4 Application requirements .6 4.1 Outlook on applications6 4.2 Supported bit rates6 5 Physical (PHY) layer requirements7 5.1 Frequency usage.7 5.2 Notching of frequencies .7 5.3 Power Spectral Density (PSD) .7 5.4 Dynamic allocation of resources (time, fre
9、quency, power) according to throughput demands7 6 Medium Access Control (MAC) layer requirements .7 6.1 Common features of 802 7 6.2 Quality of Service (QoS)8 6.3 Privacy and encryption.8 7 Interfacing requirements.8 8 Environmental requirements 8 8.1 Power consumption 8 9 System requirements 8 Hist
10、ory 9 ETSI ETSI TR 102 494 V1.1.1 (2005-06) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be fo
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12、the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. F
13、oreword This Technical Report (TR) has been produced by ETSI Technical Committee Powerline Telecommunications (PLT). The present document outlines the PLT In-house modem requirements. Introduction The present document gives a list of requirements that shall be specified in an ETSI PLT modems standar
14、d. As this understanding develops during the writing of the actual standards, the present document is likely to require change. Therefore, it should be treated as a living document rather than a definitive text. The requirements shall be for PLT Modems to be specified by ETSI PLT. These requirements
15、 should be used as guidelines for the In Home PLT Modem specification. ETSI ETSI TR 102 494 V1.1.1 (2005-06) 5 1 Scope The present document includes Technical requirements of In Home PLT modems, PHY and MAC. For instance, data rate(s), BER, repeating functionality, latency, jitter, encryption, synch
16、ronization, etc. requirements will be defined. Modems build for In home LAN applications within private networks shall support this requirements. The present document does not specify Consumer Premises Equipment of access use. 2 References For the purposes of this Technical Report (TR) the following
17、 references apply: 1 ETSI TR 102 269: “PowerLine Telecommunications (PLT); Hidden Node review and statistical analysis“. 2 ETSI TR 102 049: “PowerLine Telecommunications (PLT); Quality of Service (QoS) requirements for in-house systems“. 3 Definitions, symbols and abbreviations 3.1 Definitions For t
18、he purposes of the present document, the following terms and definitions apply: streaming data: continuously stream data EXAMPLE: A MPEG2 Transport stream. NOTE: Applications like video surveillance or video downloads shall not be implemented as streaming data. 3.2 Symbols For the purposes of the pr
19、esent document, the following symbols apply: f frequency t time 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: BER Bit Error Rate FEC Forward Error Correction IP Internet Protocol MAC Medium Access Control Mbps Mega bits per second PC Personal Computer
20、PDA Personal Digital Assistance PHY PHYsical PLT PowerLine Transmission PSD Power Spectral Density QoS Quality of Service TCP Transmission Control Protocol UDP User Data Protocol WWW World Wide Web ETSI ETSI TR 102 494 V1.1.1 (2005-06) 6 4 Application requirements 4.1 Outlook on applications AP www
21、Home Server / Gateway Surveillance Camera Audio Networked PC Networked Display Wireless Interaction Figure 1: PLT application scenarios To enable real broadband throughput for “room to room“ connectivity, an in-home backbone that connects individual devices or clusters in the house without any insta
22、llation effort is desirable. PLT fulfils these requirements: Modern modulation techniques enable the power network to transport high data rate services. Figure1 shows applications that will be possible with a PLT in-home backbone. All consumer electronic devices that are connected to the mains are e
23、quipped with a PLT modem. Wireless devices like PDAs communicate via an access point to the PLT network. Storage devices and the Internet gateway may be located in the house. Video services coming from door or baby watch cameras are available on all displays. Speakers no longer need dedicated audio
24、cables. 4.2 Supported bit rates Bit rates required here shall be reached in typical private homes, in a living unit. Minimum 20 Mbps average data rate as Data Payload on application layer (UDP/TCP): tData Payloadheader Data Payloadheader Figure 2: Phy bitstream - System shall provide the desired bit
25、 rate for 98 % of all connections (statistic based on TR 102 269 1). - Additional repeaters are acceptable in multi (more then 2) level houses. ETSI ETSI TR 102 494 V1.1.1 (2005-06) 7 Data rate shall be scalable to higher values: - A minimum of 70 Mbps (on application layer combined up- and downstre
26、am) if physical resources allow this (supported for 50 % of all possible connections, same statistics than above). 5 Physical (PHY) layer requirements 5.1 Frequency usage f/MHzRange BRange APSD10030.Frequency range A: 1,605 MHz to 30 MHz recommended. Frequency range B: 30 MHz optional. Figure 3: Fre
27、quency usage 5.2 Notching of frequencies Dynamic Notching as intended to be specified by the ETSI PLT PSD Mask work item, being the objective to prevent harmful interference to radio services. 5.3 Power Spectral Density (PSD) This depends on ongoing regulatory discussion. 5.4 Dynamic allocation of r
28、esources (time, frequency, power) according to throughput demands Any communication demands an amount of space within the cube of time, frequency and power. Only the desired volume of the whole cube of resource shall be allocated. A negative example would be, if the full frequency span were used all
29、 the time with maximum PSD just to indicate, that the modem is in operation, without transporting any data. 6 Medium Access Control (MAC) layer requirements 6.1 Common features of 802 Frame delimiting and recognition. Addressing of destination stations (both as individual stations and as groups of s
30、tations). Conveyance of source-station addressing information. ETSI ETSI TR 102 494 V1.1.1 (2005-06) 8 Protection against errors, generally by means of generating and checking frame check sequences. Control of access to the physical transmission medium. 6.2 Quality of Service (QoS) Support QoS accor
31、ding to TR 102 049 2 (Jitter and Latency): BER shall be specified application dependant (look in table of TR 102 049 2). Synchronicity or the Bus Clock (for e.g. Dolby Home Theatre, Stereo applications) shall provide a accuracy of signals (Jitter) 20s. Guaranteed bit rate for video and audio streami
32、ng data with BER better than 10E-10 after FEC. Automatic retransmission of erroneous packets for asynchronous traffic. Support for broadcast traffic. Recovery time after stream interruption: 500ms. 6.3 Privacy and encryption Data encryption on MAC layer to avoid data interception by neighbour. 7 Int
33、erfacing requirements Internal interface to application: Support for IP protocols. Bridging: IEEE802.1 and IEEE802.2. 8 Environmental requirements 8.1 Power consumption Node shut-down function. Node wake-up function. 9 System requirements System shall include concepts that allow backward compatibili
34、ty to future (next generation) In Home ETSI Powerline Standards. Upgrading of the system to higher data rates shall be possible. Network shall be scalable to future (higher) data rates backward compatible. Therefore a data rate negotiation is needed. System shall be interoperable with access PLT Mod
35、ems defined by ETSI based on a fair sharing of the medium resources in time, frequency and power. The system shall implement the coexistence mechanism to be specified by the ETSI PLT “Coexistence“ work items. ETSI ETSI TR 102 494 V1.1.1 (2005-06) 9 History Document history V1.1.1 June 2005 Publication
