CN103607762A - Carrier wave based energy saving method for wireless communication system - Google Patents
Carrier wave based energy saving method for wireless communication system Download PDFInfo
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- CN103607762A CN103607762A CN201310651554.3A CN201310651554A CN103607762A CN 103607762 A CN103607762 A CN 103607762A CN 201310651554 A CN201310651554 A CN 201310651554A CN 103607762 A CN103607762 A CN 103607762A
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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 for an LTE (Long Term Evolution) communication system. According to the energy saving method, an application scene is a mature period of network deployment and particularly is a hotspot region of communication; the circumstances that a wireless communication system is not always in the state of full-load operation and a large number of base stations are in an idle state at the time of relatively low network load (e.g. nighttime) are taken into account; some base stations are dynamically opened/closed according to the load change of the base stations during energy saving, so that unnecessary power consumption is reduced, and then, the aims of low carbon and energy saving are 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
Now, global warming has become the severe challenge of the mankind's survival and development, is the theme of World Economics problem.Along with the continuous growth of population in the world, undying exploitation and the use of the energy, the ignorance to environment in economic development, causes the gas concentration lwevel in atmosphere to raise, and causes global warming and is on the rise.Under this background; " low-carbon economy " arises at the historic moment; people have provided clear and definite definition to low-carbon economy---under the guidance of sustainable development idea; by multiple means such as technological innovation, system innovation, industrial transformation, new energy developments; reduce as much as possible the high-carbon energy resource consumptions such as coal oil; less greenhouse gas emission, reaches a kind of economic development form of socio-economic development and ecological environmental protection doulbe-sides' victory.
The communications industry developing rapidly, green communications more become a very powerful and exceedingly arrogant focus, its major significance is energy-saving and emission-reduction, reduce energy consumption, efficiently utilize the energy, strengthening waste management, promotes resource to reclaim and renewable resource utilization, focus on the mixing together of industrial chain, the negative effect of environment is minimized.Green communications are important component parts of low-carbon economy development, are related to especially our sustainable development, are emphasis and direction that the current communications industry is built.
To existing mobile communication system power-economizing method, mainly contain by microcellulor and dispose and realize energy-conservationly, by adjusting unactivated state timing, realize energy-conservationly, by adjusting the length at unused time interval, reach energy-saving effect etc.
By microcellulor, disposed and realized energy-conservation method and consider in mobile communication system that 80% energy consumption is 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,, due to favourable path loss condition and shorter propagation distance, there is higher SINR in the region being covered by microcellulor.Selected suitable propagation model, base station type and power modules etc. under LTE system, by simulating area power consumption, thereby the relation of the indexs such as total power consumption and number of base stations, base station distance is optimized base station distance and number of base stations.When guaranteeing certain regional systems throughput, can reduce to greatest extent the total power consumption of this area like this.
Above-mentionedly by microcellulor, dispose and realize energy-conservation method and have following shortcoming.The first, need to make large-scale adjustment to network design, should adjust the position of existing base station, increase again new base station.Implementation cost is too high, and energy-conservation brought income even can be less than us and adjust the cost that network is paid.The second, the deployment density of base station is higher, and the switching that user experiences in mobile process increases, and the cutting off rate that brought also can increase, and affects user and experiences, and this is that we are unacceptable.
By adjusting unactivated state timing, reach energy-conservation method key and be when not having data to send or during reception, releasing network resources also makes travelling carriage enter resting state to reduce transmitting power.Because travelling carriage is not always under state of activation, just saved energy, but the reconstruction of a new session needs spended time, in order to make to re-establish the expense minimum of connection, when travelling carriage is during in resting state, with a limited power, carry out listening paging channel.Network is preserved the configuration information relevant with session simultaneously, does not just need again to consult and reconfigure like this information when re-establishing connection.Because the size of energy consumption depends on the time of travelling carriage in state of activation, travelling carriage is shorter in the time of state of activation, and energy consumption is just less.Configure a good timing length and not only can optimization energy utilance can also reduce to rebuild expense.Monitoring for state of activation can have been offered in the measurement by unactivated state timer and mobile terminal, and this technology relates to the conversion between various state machines.For LTE system, three kinds of Non-Access Stratum states have been defined: state of activation, idle condition, released state.User's power consumption in different conditions is different, minimum in the user emission power of idle and released state, but can increase reconstruction when this state enters state of activation, delays and rebuilds expense.By the selected suitable unactivated state timing length of suitable method, make travelling carriage the longest in the time of energy saver mode, between this index and reconstruction expense, do and coordinate simultaneously, in the hope of energy-conservation to greatest extent.
By adjustment unactivated state, reach energy-conservation scheme and have following shortcoming.The first, this energy-saving scheme is based on travelling carriage, and the energy-saving effect that can realize is not remarkable, and at present travelling carriage is for the power consumption of communicating by letter few, and main consumption in game waited aspect other; The second, it is also that LTE system institute is insupportable that the time delay that re-establishes connection that this method is brought extends.
In addition, also has the method that reaches energy-saving effect by adjusting the length at unused time interval
The method is that all information of transmission are divided into energy-conservation grade, and when energy-conservation grade starts, travelling carriage enters park mode to reduce transmitting power.The main purpose of the method is to make not have the time interval of transfer of data to maximize.Unused time interval is defined as at synchronization, all there is no the time of transfer of data in the dormant window of each different energy-conservation grades.This time interval is larger, means that travelling carriage is longer in the time of resting state, and the power consumption of system is just fewer 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 to emulation by Chinese remainder theorem like this, obtain the required time interval with the relation of parameters.By the balance to computation complexity and performance gain, selected suitable parameter, these parameters also can be according to the situation adaptively modifying of system reality.In order to be applicable to different rates business in LTE system, can define multiple different energy-conservation type, define again different energy-conservation grades in every type, then allow system to select adaptively according to actual needs.
By adjusting the length at unused time interval, reach energy-conservation method and have following shortcoming, 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 in a stable state.
Summary of the invention
The object 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 user is provided simultaneously, realize the target of energy-conservation, the low-carbon (LC) of wireless communication system.
In order to reach this object, the power-economizing method that the present invention proposes mainly comprises following methods:
1, base station collaboration technology
Nervous situation.
2, the network model of 48 base stations
According to 3GPPTR32.826v10.0.0, 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.Base station spacing is 1100m, and while studying the energy-saving scheme of base station, we ignore impact base station energy consumption being brought due to temperature.Because network capacity is to design according to the situation of network traffics maximum in a day, so the most of time network in a day is in undersaturated condition, and now all base station and carrier wave are all in opening, the energy now consuming is avoidable.What we will do is exactly according to the flow situation in network, is guaranteeing under the prerequisite that user experiences.Close dynamically/open carrier frequency, to fall low-energy-consumption.
3, adaptive load balancing
Load-balancing technique can guarantee that offered load reaches balanced between each wave band in base station, and static load balancing technology realizes by each is newly accessed terminal to be assigned on some carrier wave.But due to application data stream change sudden, static load balancing is realized load balancing in the short time again, therefore can not meet the needs of this patent.And adaptive load balancing technology makes Access Network form according to carrier load situation, terminal stream and terminal capability to each distributing carrier wave that accesses terminal.By adaptive load balancing, can guarantee in the process of base station energy-saving, user is in intercarrier switching uniform distribution load flexibly.
4, alien frequencies hard-switching technology
In the energy-conservation process of base station, can to carrier wave, carry out dynamic opening and closing according to the flow of base station, this just need to allow user switch at intercarrier.Alien frequencies hard-switching technology between multicarrier application is at present quite general, guarantees that strategy and the process of intercarrier switching robustness is the tactful expansion that soft handover is used in essence, just by suitable adjustment, solves the problem producing due to multicarrier.Alien frequencies hard-switching technology detailed process is as follows:
UE is operated in frequency F1, in MAHHO process, first by BS, initiates CFSRQM(candidate frequency search (CFS) request message parameter), band candidate frequency search parameter.
UE beams back CFSRSM(candidate frequency search (CFS) response message) confirm;
BS passes through CFSCNM (candidate frequency search (CFS) command messages) order UE according to the search parameter search frequency-selecting point F2 setting, and UE is when forwarding frequency F2 to, by contacting of interruption and frequency F1
UE is by CFSRPM(candidate frequency search (CFS) report message) search report result
BS is by GHDM(direct-cut operation) order MS to be switched to frequency F2
Accompanying drawing explanation
Fig. 1 is 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 β (the 0< α of himself capacity, β <=1), and in critical point place, frequently carry out the operation of On/Off for fear of base station and carrier frequency, our regulation is when load capacity is when α+γ, and base station/carrier frequency just can be opened again, avoids this ping-pong in handoff procedure of class.
Concrete implementing procedure is as follows:
1. when the load of network is during lower than 3 β of peak value, can close 1/4th base station, utilize adaptive load balancing technology that the user who is closed on base station is switched on the base station of residue 3/4ths, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station;
2. when the load of network is during lower than 2 β of peak value, can close 1/2nd base station, utilize adaptive load balancing technology that the user who is closed on base station is switched on the base station of residue 1/2nd, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station;
3. when the load of network is during lower than the β of peak value, can close 3/4ths base station, utilize adaptive load balancing technology that the user who is closed on base station is switched on the base station of residue 1/4th, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station;
4. when the load flow of network rises to β+γ from β, whole network need be opened 2/4ths base station, and utilize adaptive load balancing technology by the user assignment by base station to the base station of opening, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station;
5. when the load flow of network rises to 2 β+2 γ from 2 β, whole network need be opened 3/4ths base station, and utilize adaptive load balancing technology by the user assignment by base station to the base station of opening, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station;
6. when the load flow of network rises to 3 β+3 γ from 3 β, whole network need be opened whole base stations, and utilize adaptive load balancing technology by the user assignment by base station to the base station of opening, need to guarantee user's speech quality on the one hand, guarantee that on the other hand user is uniformly distributed as much as possible on base station.
The above; be only preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, any people who is familiar with this technology is in the disclosed technical scope of the present invention; the variation that can expect easily or replacement, within all should being encompassed in 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. the wireless communication system energy-saving scheme based on carrier wave, its feature comprises the following steps:
A. the load information of base station statistics, and the deployment topologies relation of base station;
B. according to the loading condition of base station, judge needed number of base stations;
If C. closed certain base station, operation adaptive load balancing technology, will close on the base station that user on base station and load transfer to unlatching, and proof load is distributing equilibrium on each base station.
If D. opened certain base station, operation adaptive load balancing technology, by being distributed in each base station of Load Balanced, proof load is distributing equilibrium on each base station.
2. according to the desired a kind of wireless communication system energy-saving scheme based on carrier wave of right 1, it is characterized in that, in step B, judge the needed minimum number of base stations of network, need to carry out following steps
When the load of network is during lower than 3 β of peak value, can close 1/4th base station;
When the load of network is during lower than 2 β of peak value, can close 1/2nd base station;
When the load of network is during lower than the β of peak value, can close 3/4ths base station
When the load flow of network rises to β+γ from β, whole network need be opened 2/4ths base station;
When the load flow of network rises to 2 β+2 γ from 2 β, whole network need be opened 3/4ths base station;
When the load flow of network rises to 3 β+3 γ from 3 β, whole network need be opened whole base stations.
3. according to the desired a kind of wireless communication system energy-saving scheme based on carrier wave of right 1, it is characterized in that step C, adaptive load balancing is further comprising the steps:
When the number of base stations of opening in network reduces, adaptive load balancing technology can receive user according to the load on the base station in opening still and the mutual alignment between user and base station, guarantees the equilibrium of load on user's speech quality and base station.
When the number of base stations of opening in network increases, adaptive load balancing technology can receive user according to the mutual alignment between the load on base station and user and base station, the equilibrium of load on assurance user's speech quality and base station.
4. according to the desired a kind of wireless communication system energy-saving scheme based on carrier wave of right 1, it is characterized in that step C, intercarrier handoff technique further comprises following steps:
UE is operated in frequency F1, in MAHHO process, first by BS, initiates CFSRQM(candidate frequency search (CFS) request message parameter), band candidate frequency search parameter.
UE beams back CFSRSM(candidate frequency search (CFS) response message) confirm;
BS passes through CFSCNM (candidate frequency search (CFS) command messages) order UE according to the search parameter search frequency-selecting point F2 setting, and UE is when forwarding frequency F2 to, by contacting of interruption and frequency F1
UE is by CFSRPM(candidate frequency search (CFS) report message) search report result
BS is by GHDM(direct-cut operation) order MS to be switched to frequency F2.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112367697A (en) * | 2020-12-01 | 2021-02-12 | 中国联合网络通信集团有限公司 | Base station energy saving method and device |
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| CN102340825A (en) * | 2011-08-12 | 2012-02-01 | 中国科学技术大学 | Load-transfer-based energy-saving control method and system for mobile communication system |
| 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 |
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| CN101217824A (en) * | 2008-01-07 | 2008-07-09 | 华为技术有限公司 | Wireless network switching system and its switching method |
| CN102170685A (en) * | 2011-04-14 | 2011-08-31 | 北京邮电大学 | Energy-saving method of wireless communication system |
| CN102340825A (en) * | 2011-08-12 | 2012-02-01 | 中国科学技术大学 | Load-transfer-based energy-saving control method and system for mobile communication system |
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Cited By (2)
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Application publication date: 20140226 |