WO2011064513A1 - Procede et dispositif de reduction de la consommation electrique associee a une ligne de communication - Google Patents
Procede et dispositif de reduction de la consommation electrique associee a une ligne de communication Download PDFInfo
- Publication number
- WO2011064513A1 WO2011064513A1 PCT/FR2010/052561 FR2010052561W WO2011064513A1 WO 2011064513 A1 WO2011064513 A1 WO 2011064513A1 FR 2010052561 W FR2010052561 W FR 2010052561W WO 2011064513 A1 WO2011064513 A1 WO 2011064513A1
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- WIPO (PCT)
- Prior art keywords
- power
- carriers
- group
- carrier
- reducing
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Definitions
- the present invention relates to the field of communications, and more particularly to the electrical consumption of equipment associated with digital subscriber lines.
- DSL Digital Subscriber Line
- ADSL2 Analog Subscriber Line
- SDSL Symmetry Digital Subscriber Line
- VDSL evolutions for "Very hight bitrate Digital Subscriber Line”
- VDSL2 Very hight bitrate Digital Subscriber Line
- the ITU-T G.992.3 standard describes a mode, called L2 mode, to reduce the power of an ADSL2 line in the event of a drop in traffic. More precisely, this mode makes it possible to reduce the transmission power of a downlink signal, that is to say, in the central direction towards the customer's equipment, of a digital subscriber line.
- An ADSL2 line has a number of carriers for data transport. Some of these carriers are reserved for the upstream transport of data (from the customer to the central office). Others are reserved for the downstream transport of data (from the central office to the customer).
- each carrier When the traffic is large (mode L0), each carrier has a predetermined power required for the transport of the data.
- the power of each carrier is decreased by a predetermined number of decibels.
- a decrease of 10 dB can for example result in energy savings of 500 mW per ADSL2 line.
- this mode generates very large variations in noise power on the neighboring lines. These variations result in numerous disturbances such as signal losses, significant error rate, resynchronization. There is therefore a need for a low-power mode that does not disturb neighboring lines.
- the invention improves the situation.
- the invention relates to a method of reducing the power consumption associated with a communication line comprising a set of N predetermined power carriers able to transmit information to a reception device characterized in that it comprises the following steps:
- the determined volume is less than a predetermined threshold, allocating a power lower than the predetermined power to the carriers of the second group, the power of the carriers of the first group being maintained.
- the maintenance of at least one carrier with high power makes it possible to disturb the neighboring lines less during the change of mode, that is to say when switching from a mode to full power, where all the carriers have the predetermined power P, in a reduced power mode or when switching from a low power mode to a full power mode.
- the power allocated to the carriers of the second group is of a predetermined value.
- This embodiment has the advantage of being simple since it does not require calculation of power to be allocated.
- a carrier of the first group is between two carriers of the second group.
- This embodiment is simple to implement.
- the alternation of full power carriers and reduced power carriers allows a significant reduction in consumption.
- the disturbances on the neighboring lines are less than those caused by the L2 mode.
- the first group comprises at least one set of consecutive carriers.
- This mode makes it possible to further reduce disturbances on neighboring lines.
- the power allocated is a value between a predetermined minimum power value and the predetermined power.
- This mode makes it possible to further limit disturbances on neighboring lines while having a significant gain in consumption.
- the first group consists of a carrier.
- the set of carriers is an ordered set
- the second group comprises a first subgroup containing the carriers of a rank lower than the carrier of the first group and a second subgroup containing the carriers of higher rank.
- the invention relates to a computer program product comprising instructions for implementing the steps of the method of reducing the power consumption as described above, when it is loaded and executed by a processor.
- FIG. 1 illustrates the general context of the invention according to one embodiment
- FIG. 2 is a diagram illustrating a device for reducing power consumption according to a first embodiment
- FIG. 3 is a flowchart illustrating the various steps of a method for reducing the electrical consumption of the invention
- FIG. 4 is a diagram illustrating a first embodiment of the reduction method of the invention
- FIG. 5 is a diagram illustrating a second embodiment of the reduction method of the invention.
- FIG. 6 is a diagram illustrating a third embodiment of the reduction method of the invention.
- Figure 1 is a diagram illustrating the general context of the invention according to one embodiment.
- a DSLAM (for Digital Subscriber Line Access Multiplexer) E installed for example in the premises of a switch, is able to receive information from an R network, such as for example the Internet, via a communication line.
- R network such as for example the Internet
- LR of a first type and retransmit to a subscriber terminal TA, TAi, TA 2 , ... TA k via a communication line LA, LAj, LA 2 , ... LA k of a second type .
- the LR type communication line is for example an Ethernet link.
- the communication lines LA, LA t , LA 2 , ... LA k of the second type are for example ADSL2 lines.
- the DSLAM E is also able to transmit information from one of the subscriber terminals TA, TAi, TA 2 , ... TA k via a communication line LA, LAi, LA 2 ... LA k of the second type towards the network via the first type LR communication line.
- the communication line LA conventionally comprises a predetermined number of carriers.
- M carriers are reserved for the upstream transport of information, that is to say from the subscriber terminal TA to DSLAM E and N carriers Li, L 2 , ... L N are reserved the downstream transport of information, that is from DSLAM E to the subscriber terminal TA.
- the lines LAj, LA 2 , ... LA k represent lines close to the line LA.
- the DSLAM E also comprises a device D for reducing the power consumption suitable for implementing a method of reducing the power consumption according to the invention.
- the reduction device D comprises in particular a processing unit 20 equipped with a microprocessor, a read-only memory ROM and a RAM RAM 40.
- the ROM 30 includes registers storing a PG computer program including program instructions adapted to implement implement a method of reducing the power consumption according to the invention as described in the following description.
- the reduction device D also comprises a group determination module DGR, a traffic calculation module TRA and an ATP power allocation module.
- a predetermined power P has been assigned to each carrier L 1 , L 2 , ... LN of the set N.
- the power allocated to a carrier corresponds to the maximum bit rate of the carrier. carrier, that is to say a maximum number of information that can be transmitted in a unit of time determined.
- the group determination module DGR determines, on the one hand, a first group G1 of carriers of the N carriers and, on the other hand, a second group G2 of carriers of the N carriers.
- the groups G 1 and G 2 are distinct groups, that is to say that a carrier of all the N carriers can not belong to the first group and the second group.
- the carriers of the set N are distributed between the first group G1 and the second group G2.
- the first group consists of carrier NI Fi, F2, ... Fj ... F N i and the second group consists of N2 carriers Hi, H 2 , ... H j . .. ⁇ 2 ⁇
- the traffic calculation module TRA determines the downstream traffic of the communication line LA, that is to say the volume of information V received per unit of time, to be transmitted to the terminal.
- TA subscriber via the N carriers of the LA communication line.
- Step E2 is followed by a step E3 during which the volume of information V is compared with a predetermined threshold volume VM.
- the step E2 is repeated. If the information volume V is greater than the threshold volume VM, the step E2 is repeated. If the information volume V is less than the threshold volume VM, the power allocation module ATP assigns, during a step E4, a reduced power Pmj to each carrier H j of the second group G2. The reduced power Pmj allocated to the carrier H j is a power value less than the power P allocated to each carrier during the previous step E0.
- the power of the carriers F, of the first group G1 is not modified.
- step E4 is preceded by a step (not referenced in the figure) in which a request for speed reduction agreement is sent to the subscriber terminal TA and a response containing an acceptance or a refusal from the subscriber is received in return.
- Step E4 is performed if the customer's response contains an acceptance. In the case where the response received is a refusal or in the case where no response is received, step E4 is not performed and the process stops.
- Step E4 is followed by a step E5 during which the volume of information V received per unit of time is again determined and compared with a second predetermined threshold volume Vmax.
- the volume of information is greater than a second predetermined threshold volume Vmax, the power allocated to each carrier Hj of the second group is again the maximum power.
- the first group determined during the group determination step E1 comprises the carriers Fi, F 2 . . .FN I.
- the first carrier Fj of the first group G1 is chosen randomly.
- the carrier Fi is selected according to a variable parameter over time, for example according to a parameter of the clock type.
- the first carrier Fi is the carrier Li whose index i is a predetermined number, for example a different number assigned to each communication line LA t , LA 2 , ....
- a gap between two consecutive carriers of the first group G1 is also determined.
- the space between two consecutive carriers of the first group G1 is a number X of carriers.
- the carrier F 2 is determined so that X carrier separates it from the carrier
- the carrier Fj is determined so that X carriers separates it from the carrier Fj_i.
- the group G2 is composed of the carriers of the set of N carriers L
- step E4 the power allocated to each carrier in group G2 is a predetermined power Pmin.
- Pmin is the predetermined power P minus a predetermined value Y.
- the configuration of this mode can be described by the formula: X% YZ where X represents the space between two carriers of the first group G1, Y represents the power reduction for the carriers of the second group G2 and Z represents the index of the carrier corresponding to the first carrier F ⁇ .
- FIG. 4 illustrates an example in which the first carrier Fi is the carrier of index 3 and in which the space X between two consecutive carriers of the first group is 5.
- the carriers of the first group G1 determined in the step E1 are consecutive carrier groups of spaced apart B carrying the second group G2.
- the position of the first carrier varies randomly or according to a variable parameter.
- the reduced power Pmin allocated during step E4 to the carriers of the second group is an identical power for all the carriers.
- the reduced power Pmin corresponds to the predetermined power P minus a fixed value Y.
- B% YZ% T where B represents the space between two carrier sequences of the first group G1, Y represents the power reduction for the carriers of the second group G2, Z represents the beginning of the slot, that is to say the carrier index corresponding to the first carrier F
- the first group G1 determined during the step E2 comprises a single carrier F1 corresponding to the carrier Ls of rank S and the second group G2 comprising the (N-1) carriers not belonging to the group G1.
- the group G2 comprises two subgroups: a first subgroup G21 comprises the carriers Li of rank i less than the rank S of the carrier F1 and a second subgroup G22 comprising the carriers Lj of rank j greater than the rank S of the carrier F1 first group Gl.
- the reduced power allocated in step E4 to the carriers of the second group is a variable power depending on the rank of the carriers.
- the reduced power allocated to the first carrier of the first subgroup G21 is a predetermined power Pi ra j n corresponding to the predetermined power P minus a value Q.
- the reduced power allocated to the other carriers of the first subgroup G21 is a power determined according to a linear distribution between the power P i mi and the power P. As illustrated in FIG. 6, the power of a carrier Li of rank i of the first subgroup G21 is greater than the power of the preceding carrier Lj_i of rank i-1 and smaller than the power of the following carrier Lj + i of rank i + 1.
- the power allocated to the last carrier of the second subgroup G22 is a predetermined power P2min corresponding to the predetermined power P minus a value W.
- the power allocated to the other carriers of the second subgroup G22 is a power determined according to a linear distribution between the power P and P 2m j n .
- the power of a carrier Lj of rank j of the second subgroup G22 is less than the power of the previous carrier L j -i and greater than the power of the next carrier L j + i.
- the configuration of this mode can be described by the formula: Q% S% W where Q represents the power reduction on the first carrier of the second group G2, S represents the rank of the carrier Fi of the first group and W represents the decrease power on the last carrier of the second group G2.
- the rank of the carrier of the first group G1 is 66. This index corresponds to a carrier frequency of 284.625 kHz. Tests have shown that this configuration gives the best results in terms of reducing power consumption and reducing the impact on neighboring lines.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080053893.6A CN102630375B (zh) | 2009-11-30 | 2010-11-29 | 用于减少与通信线相关联的电力消耗的方法和装置 |
EP10807449.3A EP2507962B1 (fr) | 2009-11-30 | 2010-11-29 | Procédé et dispositif de réduction de la consommation électrique associée a une ligne de communication |
US13/512,763 US9083493B2 (en) | 2009-11-30 | 2010-11-29 | Method and a device for reducing the electricity consumption associated with a communications line |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0958494 | 2009-11-30 | ||
FR0958494 | 2009-11-30 |
Publications (1)
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WO2011064513A1 true WO2011064513A1 (fr) | 2011-06-03 |
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PCT/FR2010/052561 WO2011064513A1 (fr) | 2009-11-30 | 2010-11-29 | Procede et dispositif de reduction de la consommation electrique associee a une ligne de communication |
Country Status (4)
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US (1) | US9083493B2 (fr) |
EP (1) | EP2507962B1 (fr) |
CN (1) | CN102630375B (fr) |
WO (1) | WO2011064513A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013004319A1 (fr) * | 2011-07-05 | 2013-01-10 | Sony Corporation | Modem de communication sur ligne électrique, système de communication sur ligne électrique et procédé de communication sur ligne électrique |
US8844817B2 (en) | 2013-01-05 | 2014-09-30 | Otter Products, Llc | Electronic device case for mobile point of sale |
US10164468B2 (en) | 2015-06-16 | 2018-12-25 | Otter Products, Llc | Protective cover with wireless charging feature |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6259746B1 (en) * | 1998-01-14 | 2001-07-10 | Motorola Inc. | Method for allocating data and power in a discrete multi-tone communication system |
US20050213405A1 (en) * | 2004-03-29 | 2005-09-29 | Stmicroelectronics Ltd. | Power save mode transition using loading translation function |
EP1998524A1 (fr) * | 2006-03-09 | 2008-12-03 | Huawei Technologies Co., Ltd. | Procédé et dispositif d'économie d'énergie dans des lignes d'abonné numériques |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100790114B1 (ko) * | 2002-03-16 | 2007-12-31 | 삼성전자주식회사 | 직교주파수 분할다중 접속 시스템에서 적응적 파일럿반송파 할당 방법 및 장치 |
CN100512251C (zh) * | 2005-02-06 | 2009-07-08 | 华为技术有限公司 | 一种降低adsl线路发送功率的方法 |
US8204100B2 (en) * | 2009-01-15 | 2012-06-19 | Lantiq Deutschland Gmbh | Methods and apparatuses for data transmission |
-
2010
- 2010-11-29 US US13/512,763 patent/US9083493B2/en active Active
- 2010-11-29 WO PCT/FR2010/052561 patent/WO2011064513A1/fr active Application Filing
- 2010-11-29 CN CN201080053893.6A patent/CN102630375B/zh active Active
- 2010-11-29 EP EP10807449.3A patent/EP2507962B1/fr active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6259746B1 (en) * | 1998-01-14 | 2001-07-10 | Motorola Inc. | Method for allocating data and power in a discrete multi-tone communication system |
US20050213405A1 (en) * | 2004-03-29 | 2005-09-29 | Stmicroelectronics Ltd. | Power save mode transition using loading translation function |
EP1998524A1 (fr) * | 2006-03-09 | 2008-12-03 | Huawei Technologies Co., Ltd. | Procédé et dispositif d'économie d'énergie dans des lignes d'abonné numériques |
Also Published As
Publication number | Publication date |
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CN102630375B (zh) | 2015-08-19 |
EP2507962B1 (fr) | 2017-08-30 |
EP2507962A1 (fr) | 2012-10-10 |
CN102630375A (zh) | 2012-08-08 |
US20120319467A1 (en) | 2012-12-20 |
US9083493B2 (en) | 2015-07-14 |
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