CN102170685A - Energy-saving method of wireless communication system - Google Patents
Energy-saving method of wireless communication system Download PDFInfo
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- CN102170685A CN102170685A CN2011100935528A CN201110093552A CN102170685A CN 102170685 A CN102170685 A CN 102170685A CN 2011100935528 A CN2011100935528 A CN 2011100935528A CN 201110093552 A CN201110093552 A CN 201110093552A CN 102170685 A CN102170685 A CN 102170685A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an energy-saving method of a wireless communication system, and the method is designed for solving the problem that the coverage of base stations is non-overlapped in the deployment of the wireless communication system. The wireless communication system is not always in a full load operation state, and carriers from the base stations are in an idle state in much time, so that one certain carrier is dynamically turned on/off according the change of loads of the base stations in the energy-saving process to save the energy consumption of the base stations for the carrier, thus the low-carbon energy-saving purpose is achieved.
Description
Technical field
Patent of the present invention relates to wireless communication field, especially the power-saving technology aspect of wireless communication system.
Background technology
Over more than 200 year, along with going deep into of process of industrialization, a large amount of greenhouse gas mainly are the discharges of carbon dioxide, cause global temperature rising, weather to change, and this has been a undisputable fact.In May, 2008, Japanese Ministry of environment proposes " towards 12 action of low-carbon (LC) society ".12 action relate to dwelling house department, industrial department, traffic department, energy conversion department and relevant intersection department, each on obstacle and strategical decision thereof that all comprises following target, realizes target.The national strategy file of formal issue in British government on July 15th, 2009 " Britain's low-carbon (LC) conversion plan " by name proposes the year two thousand twenty the carbon emission amount is reduced 34% on the nineteen ninety basis, and its content relates to many aspects such as the energy, industry, traffic and house.Chinese Government promises to undertake that the year two thousand twenty per GDP carbon emission reduced 40% to 45% than 2005.Copenhagen weather summit in 2009 attempts to set up the global framework of a greenhouse gas emission, although various countries still wrestle on the reduction of discharging problem, the notion of " low-carbon (LC) " is rooted in the hearts of the people, and also is the road that the following mankind must walk.
Global information communication letter industry had been discharged about 7.5 hundred million tons of carbon dioxide altogether in 2009, the year power consumption of Communication in China industry surpasses 20,000,000,000 degree, the annual coal amount that consumes is about more than 6,750,000 tons, produce about 1,700 ten thousand tons of amount of carbon dioxide, global number of mobile phone users was expected to reach 5,000,000,000 in 2010, arrange net and the construction of next generation mobile communication make energy consumption aggravate more, the greenhouse gas emission of the mobile communications industry of bringing thus.Ministry of Industry and Information will advance communication operation enterprise energy management system construction, and actively distributed base station, communication network IPization are promoted in guiding, and base station standardized module or the like series of new techniques and new technology promote the raising of industry energy use efficiency.
The existing mobile communications system power-economizing method mainly contains and dispose to realize energy-conservationly by microcellulor, realizes energy-conservationly by adjusting the unactivated state timing, reaches energy-saving effect etc. by adjusting unused time length at interval.
Dispose to realize that by microcellulor method for saving energy considers in the mobile communication system 80% energy consumption at wireless access network, wherein energy consumption of base station is particularly crucial.Consider energy requirement, it is generally acknowledged, dispose highdensity network topology structure small-sized, low power base station and can bring powerful gain to system.In addition, because favourable path loss condition and shorter propagation distance, there is higher SINR in the zone that is covered by microcellulor.Selected suitable propagation model, base station type and power module etc. under the LTE system, by the simulating area power consumption, thus the relation optimization base station distance and the number of base stations of index such as total power consumption and number of base stations, base station distance.When guaranteeing certain regional systems throughput, can reduce the total power consumption of this area to greatest extent like this.
The above-mentioned deployment by microcellulor realizes that method for saving energy has following shortcoming.The first, need make large-scale adjustment to network design, should adjust the position of existing base station, increase new base station again.Implementation cost is too high, the energy-conservation income of bringing even can adjust the cost that network is paid less than us.The second, the deployment density of base station is high more, and the switching that the user is experienced in the process that moves increases, and the cutting off rate that brought also can increase, and influences user experience, and this is that we are unacceptable.
Reach the method for saving energy key and be when not having data to send or during reception by adjusting the unactivated state timing, releasing network resources also makes travelling carriage enter resting state to reduce transmitting power.Because travelling carriage is not always to be under the state of activation, just saved energy, but the reconstruction of a new session needs spended time, in order to make the expense minimum that rebulids connection, when travelling carriage is in resting state, come the listening paging channel with a limited power.Network is preserved the configuration information relevant with session simultaneously, does not just need to consult again and reconfigure information like this when rebuliding connection.Because the size of energy consumption depends on that travelling carriage is in the time of state of activation, it is short more that travelling carriage is in the time of state of activation, and energy consumption is just more little.Disposing a good timing length not only can optimize capacity usage ratio and can also reduce to rebuild expense.Offer on can the measurement by unactivated state timer and portable terminal for the monitoring of state of activation and to finish, this technology relates to the conversion between the various state machines.For the LTE system, three kinds of Non-Access Stratum states have been defined: state of activation, idle condition, released state.The user's power consumption that is in different conditions is different, and the user emission power that is in idle and released state is minimum, delays and rebuilds expense but can increase reconstruction when this state enters state of activation.By the selected suitable unactivated state of suitable method length regularly, it is the longest to make that travelling carriage is in time of energy saver mode, does coordination in this index between the expense with rebuilding simultaneously, in the hope of energy-conservation to greatest extent.
Reach energy-conservation scheme by the adjustment unactivated state following shortcoming is arranged.The first, this energy-saving scheme is based on travelling carriage, and the energy-saving effect that can realize is not remarkable, and the travelling carriage power consumption that is used to communicate by letter at present and few, and main consumption in recreation waited aspect other; The second, it also is that institute of LTE system is insupportable that the time delay that rebulids connection that this method is brought prolongs.
In addition, also have by adjusting the method that unused time length at interval reaches energy-saving effect
This method is that all information that will transmit are divided into energy-conservation grade, and when energy-conservation grade started, travelling carriage entered park mode to reduce transmitting power.The main purpose of this method is to make not have the maximization of the time interval of transfer of data.Unused time is defined as at interval at synchronization, does not all have the time of transfer of data in the dormant window of each different energy-conservation grades.This time interval is big more, and it is long more to mean that promptly travelling carriage is in time of resting state, and the power consumption of system is just few more like this.Three parameters of energy-conservation level setting: the initial frame number of initial dormant window, monitoring window, first dormant window.Can and improve algorithm and this be carried out emulation by Chinese remainder theorem like this, obtain the relation of institute seeking time interval with each parameter.By balance to computation complexity and performance gain, selected suitable parameters, these parameters also can be according to the situation adaptively modifying of system's reality.In order to be fit to different rates business in the LTE system, can define multiple different energy-conservation type, define different energy-conservation grades again in every type, allow system to select adaptively according to actual needs then.
Reach method for saving energy by the length of adjusting the unused time interval following shortcoming is arranged, algorithm complex is higher, especially for changeable wireless communication system, the variation of network can cause a series of changes of parameter, system takes carves adjustment self parameter to adapt to different professional qualification, is difficult to be in a stable status.
Summary of the invention
The objective of the invention is to propose a kind of energy-saving scheme of wireless communication system, efficiently solve the shortcoming of existing power-economizing method, can reduce the energy resource consumption of wireless communication system, the service quality that provides for the user is provided simultaneously, realize the target of energy-conservation, the low-carbon (LC) of wireless communication system.
In order to reach this purpose, the power-economizing method that the present invention proposes mainly comprises following method:
1, Multi-Carrier basestation
Multi-Carrier basestation is a kind of novel base station that mobile operator is introduced under the development trend of whole industry energy-saving and emission-reduction.The carrier number that Multi-Carrier basestation has veneer is more, and the characteristics that the capacity of base station is higher have reduced needed number of base stations in the network, and operator can come the corresponding carrier wave of open and close, flexible operation by software.And the more traditional base station volume of the volume of Multi-Carrier basestation has had significantly minimizing, has further alleviated the situation of machine room space anxiety.
2, the network model of 48 base stations
According to 3GPP TR 32.826v10.0.0, the research scene of this patent adopts the network design of 48 base stations, and there are 4 carrier wave sections each base station, and each carrier wave section is 5MHz.The base station spacing is 1100m, during the energy-saving scheme of research base station, we ignore since temperature to influence that base station energy consumption brought.Because being the situation according to network traffics maximum in a day, network capacity designs, so the most of time networks in a day are in undersaturated condition, and this moment, all base station and carrier waves all were in opening, and the energy that consume this moment is avoidable.What we will do is exactly according to the flow situation in the network, under the prerequisite that guarantees user experience.Close/open carrier frequency dynamically, to reduce energy consumption.
3, adaptive load balancing
Load-balancing technique can guarantee that offered load reaches balanced in the base station between each wave band, and the static load balancing technique realizes by each is newly accessed terminal to be assigned on some carrier wave.But because the application data stream variation is sudden, the static load equilibrium realizes load balancing in the short time again, therefore can not satisfy the needs of this patent.And the adaptive load balancing technology makes Access Network come to each distributing carrier wave that accesses terminal according to carrier load situation, terminal stream composition and terminal capability.By adaptive load balancing, can guarantee that in the process of base station energy-saving the user is in intercarrier switching and uniform distribution load flexibly.
4, carrier intelligent turn-offs technology
The telephone traffic of wireless network every day substantially all has two notions when busy, at 10 in the morning and afternoon can occur peak value basically at 7 in when busy, and telephone traffic reaches maximum during this moment busy, and other times (such as: the 0-8 point) telephone traffic is just lower.Wireless network generally will satisfy the demand of telephone traffic when doing when doing the carrier frequency configuration, so the utilance of carrier frequency can be lower when the spare time.The carrier intelligent technology of turn-offing has been utilized this characteristic of telephone traffic just, when certain carrier frequency not during traffic carried, can reach the purpose of energy-saving and emission-reduction by the power amplifier that turn-offs this carrier frequency.
In the control that carrier frequency intelligence is turn-offed, can control: the time that carrier frequency intelligence is turn-offed can be set on time dimension, open this function such as the 0-7 point of every day from time and two dimensions of telephone traffic; On the telephone traffic dimension, when the channel occupancy number of certain sub-district is lower than some values, select an idle carrier frequency to turn-off, when the channel occupancy number of certain sub-district is higher than some values, can open the carrier frequency of a shutoff.These two dimensions can singlely be used, and also can use simultaneously.
5, alien frequencies hard-switching technology
In the energy-conservation process of base station, can carry out dynamic opening and closing to carrier wave according to the flow of base station, this just need allow the user switch at intercarrier.Alien frequencies hard-switching technology between multicarrier application at present is quite general, guarantees that the strategy and the process of intercarrier switching robustness is the expansion of the employed strategy of soft handover in essence, just solves by suitable adjustment because the problem of multicarrier generation.Alien frequencies hard-switching technology detailed process is as follows:
UE is operated in frequency F1, in the MAHHO process, at first initiates CFSRQM (candidate frequency search (CFS) request message parameter) by BS, band candidate frequency search parameter.
UE beams back CFSRSM (candidate frequency search (CFS) response message) and confirms;
BS passes through CFSCNM (candidate frequency search (CFS) command messages) order UE according to the search parameter search frequency-selecting point F2 that sets, and UE is when forwarding frequency F2 to, with getting in touch of interruption and frequency F1
UE is by CFSRPM (candidate frequency search (CFS) report message) search report result
BS switches to frequency F2 by GHDM (direct-cut operation) order MS
Description of drawings
Fig. 1 is an energy-saving scheme particular flow sheet in the specific embodiment of the invention.
Embodiment
In carrying out energy-conservation process, we will guarantee that the load of a certain base station is no more than the α of himself capacity limitation, load on a certain carrier frequency is no more than the β (0＜α of himself capacity, β＜=1), and frequently carry out the operation of On/Off in critical point place for fear of base station and carrier frequency, our regulation is when load capacity during above α+γ, and base station/carrier frequency just can be opened once more, avoids this ping-pong in handoff procedure of class.
Concrete implementing procedure is as follows:
1. when the load flow of base station is lower than 3 β of peak value, the carrier frequency of a certain minimum load is closed in this base station, the user who utilizes the adaptive load balancing technology will be closed on the carrier frequency switches in other three carrier frequency, and guarantees that the load on these three carrier frequency is basic identical;
2. when the load of base station is lower than 2 β of peak value, keeping two loads opens than high carrier frequency, close two other carrier frequency, the user who utilizes the adaptive load balancing technology will be closed on the carrier frequency switches in all the other two carrier frequency, and guarantees that the load on these two carrier frequency is basic identical;
3. when the load of base station is lower than the β of peak value, this base station the highest carrier frequency of load is held open, closes all the other carrier frequency, utilize the adaptive load balancing technology that the user on all the other carrier frequency is switched on this carrier frequency;
When the load flow of base station when β rises to β+γ, the base station is opened a carrier frequency again, the user who utilizes the adaptive load balancing technology will enliven in the carrier frequency is distributed in these two carrier frequency uniformly, guarantees that the load on two carrier frequency is basic identical;
When the load flow of base station when 2 β rise to 2 β+2 γ and go up, the base station need be opened a carrier frequency again, utilizes the adaptive load balancing technology that the user on original two movable carrier frequency sections is transferred on the carrier frequency of new unlatching;
When the load flow of base station when 3 β rise to 3 β+3 γ and go up, all carrier frequency are opened in the base station, utilize the adaptive load balancing technology will load in four carrier frequency sections and evenly distribute.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. wireless communication system energy-saving scheme, its feature may further comprise the steps:
A. the load information of base station statistics, and the flow distribution information on each carrier wave;
B. judge needed carrier number according to the loading condition of base station;
If C. closed certain carrier wave, operation adaptive load balancing technology will be closed user on the carrier wave and load transfer on the carrier wave section of opening, and proof load is distributing equilibrium on each carrier wave section.
If D. opened certain carrier wave, operation adaptive load balancing technology is distributed to the base station load in each carrier wave uniformly, and proof load is distributing equilibrium on each carrier wave.
2. according to right 1 desired a kind of wireless communication system energy-saving scheme, it is characterized in that, judge among the step B and need carry out following steps by the needed minimum carrier number in base station
When the load of base station was lower than 3 β of peak value, the base station needed 3 and enlivens carrier wave;
When the load of base station was lower than 2 β of peak value, the base station needed 2 and enlivens carrier wave;
When the load of base station was lower than the β of peak value, the base station only needed 1 to enliven carrier wave;
When the load flow of base station when β rises to β+γ, the enlivening carrier number and need rise to 2 of base station;
When the load flow of base station when 2 β rise to 2 β+2 γ and go up, the enlivening carrier number and need rise to 3 of base station;
When the load flow of base station when 3 β rise to 3 β+3 γ and go up, the enlivening carrier number and need rise to 4 of base station.
3. according to right 1 desired a kind of wireless communication system energy-saving scheme, it is characterized in that step C, adaptive load balancing further may further comprise the steps:
When the enlivening carrier number and reduce of base station, the adaptive load balancing technology can receive the user according to the loading condition on the still active carrier wave, guarantees to enliven the load Distribution equilibrium on the carrier wave.
When the enlivening carrier number and increase of base station, the adaptive load balancing technology can be distributed to the base station load on each carrier wave uniformly according to the load state of current base station.
4. according to right 1 desired a kind of wireless communication system energy-saving scheme, it is characterized in that step C, the intercarrier handoff technique further comprises following steps:
UE is operated in frequency F1, in the MAHHO process, at first initiates CFSRQM (candidate frequency search (CFS) request message parameter) by BS, band candidate frequency search parameter.
UE beams back CFSRSM (candidate frequency search (CFS) response message) and confirms;
BS passes through CFSCNM (candidate frequency search (CFS) command messages) order UE according to the search parameter search frequency-selecting point F2 that sets, and UE is when forwarding frequency F2 to, with getting in touch of interruption and frequency F1
UE is by CFSRPM (candidate frequency search (CFS) report message) search report result
BS switches to frequency F2 by GHDM (direct-cut operation) order MS.
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| CN102333358A (en) * | 2011-10-13 | 2012-01-25 | 中兴通讯股份有限公司 | Base station controller and carrier frequency opening method and device |
| CN102625337A (en) * | 2012-03-08 | 2012-08-01 | 北京邮电大学 | System and method for autonomous energy-saving management of wireless access network |
| CN102711182A (en) * | 2012-06-05 | 2012-10-03 | 中国联合网络通信集团有限公司 | Traffic balance and energy-saving control method, realizing method and realizing device |
| CN102883419A (en) * | 2012-09-20 | 2013-01-16 | 中国联合网络通信集团有限公司 | Energy consumption control method and base station |
| CN103024880A (en) * | 2011-09-28 | 2013-04-03 | 普天信息技术研究院有限公司 | Energy saving method and system of cell |
| CN103379644A (en) * | 2012-04-13 | 2013-10-30 | 中国移动通信集团公司 | Carrier wave scheduling method and system |
| CN103607762A (en) * | 2013-12-04 | 2014-02-26 | 北京邮电大学 | Carrier wave based energy saving method for wireless communication system |
| CN104080155A (en) * | 2013-03-28 | 2014-10-01 | 电信科学技术研究院 | Cell energy-saving and energy-saving compensation methods and equipment |
| CN103916261B (en) * | 2013-01-09 | 2019-03-01 | 华为技术有限公司 | Determine the method and control device for entering the quantity of network equipment of energy-saving mode |
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| CN103024880A (en) * | 2011-09-28 | 2013-04-03 | 普天信息技术研究院有限公司 | Energy saving method and system of cell |
| CN102333358A (en) * | 2011-10-13 | 2012-01-25 | 中兴通讯股份有限公司 | Base station controller and carrier frequency opening method and device |
| WO2013053231A1 (en) * | 2011-10-13 | 2013-04-18 | 中兴通讯股份有限公司 | Base station controller and carrier opening method and device |
| CN102625337A (en) * | 2012-03-08 | 2012-08-01 | 北京邮电大学 | System and method for autonomous energy-saving management of wireless access network |
| CN102625337B (en) * | 2012-03-08 | 2014-08-20 | 北京邮电大学 | System and method for autonomous energy-saving management of wireless access network |
| CN103379644A (en) * | 2012-04-13 | 2013-10-30 | 中国移动通信集团公司 | Carrier wave scheduling method and system |
| CN103379644B (en) * | 2012-04-13 | 2017-03-22 | 中国移动通信集团公司 | Carrier wave scheduling method and system |
| CN102711182B (en) * | 2012-06-05 | 2016-09-21 | 中国联合网络通信集团有限公司 | Traffic balancing and energy-saving control method, implementation method and device |
| CN102711182A (en) * | 2012-06-05 | 2012-10-03 | 中国联合网络通信集团有限公司 | Traffic balance and energy-saving control method, realizing method and realizing device |
| CN102883419A (en) * | 2012-09-20 | 2013-01-16 | 中国联合网络通信集团有限公司 | Energy consumption control method and base station |
| CN103916261B (en) * | 2013-01-09 | 2019-03-01 | 华为技术有限公司 | Determine the method and control device for entering the quantity of network equipment of energy-saving mode |
| CN104080155A (en) * | 2013-03-28 | 2014-10-01 | 电信科学技术研究院 | Cell energy-saving and energy-saving compensation methods and equipment |
| CN103607762A (en) * | 2013-12-04 | 2014-02-26 | 北京邮电大学 | Carrier wave based energy saving method for wireless communication system |
| CN114900841A (en) * | 2022-03-11 | 2022-08-12 | 西南科技大学 | Site selection method of communication station and communication device |
| CN114900841B (en) * | 2022-03-11 | 2023-06-09 | 西南科技大学 | Site selection method of communication site and communication device |
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Application publication date: 20110831 |