CN106789116A - A kind of energy-saving scheduling method in NB IOT networks - Google Patents

A kind of energy-saving scheduling method in NB IOT networks Download PDF

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Publication number
CN106789116A
CN106789116A CN201710192845.9A CN201710192845A CN106789116A CN 106789116 A CN106789116 A CN 106789116A CN 201710192845 A CN201710192845 A CN 201710192845A CN 106789116 A CN106789116 A CN 106789116A
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alternate channel
channel
node
signal
represent
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CN106789116B (en
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张亚婷
刘雁飞
尚建荣
高敏
张薇薇
杨乐
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CERTUSNET Corp.
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Xian University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • 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
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses the energy-saving scheduling method in a kind of NB IOT networks, the present invention is during energy-saving distribution, it is preferential to attempt replacing the compensation of the node of main channel, if power conservation requirement can be reached, then continue to carry out signal transmission using main channel, if after compensation is replaced, can not still meet power conservation requirement, then scheduler module switches to the minimum alternate channel of load.

Description

A kind of energy-saving scheduling method in NB-IOT networks
Technical field
The present invention relates to the energy-saving scheduling method in NB-IOT communication technical fields, more particularly to a kind of NB-IOT networks.
Background technology
Internet of Things market potential is huge, will enter extensive eruptive growth.Current mass marketing day hastens towards saturation, Cause operator's profit increasing option, it would be highly desirable to seek new profit growth point, according to the address prediction of Mai Kenxi Deng Duojia mechanisms, Following 5-10 Internet of Things connection number and market scale will occur extensive eruptive growth.All things on earth interconnection has turned into global operation The grand strategy direction that business, science-and-technology enterprise and industry alliance are actively laid out.Current Cellular Networks covering the whole world 90% population, cover Cover the geographical position more than 50%.Based on existing cellular network, operator can provide a very competitive Internet of Things Network technology, is exactly NB-IoT.NB-IoT best suits LPWA class industry in aspect best performances such as covering, power consumption, cost, connection numbers Business demand.
NB-IoT possesses four characteristicses：One is wide covering, it will thus provide improved in-door covering, under same frequency range, NB- IoT expands 100 times than existing network gain 20dB, area coverage；Two is the ability for possessing support magnanimity connection, NB-IoT mono- Individual sector can support 100,000 connections, support the net of low latency sensitivity, ultralow equipment cost, low equipment power dissipation and optimization Network framework；Three is more low-power consumption, and the stand-by time of NB-IoT terminal modules is 10 years；Four is lower module cost, enterprise Single successive module expected from industry is no more than 5 dollars.
The Chinese patent of Application No. 201110093552.8 discloses a kind of power-economizing method of wireless communication system, for The scene that coverage in wireless communication system deployment between base station is not overlapped, it is contemplated that wireless communication system is not the moment In running at full capacity state, carrier wave many times of base station are at idle condition, according to base station during energy-conservation A certain Carrier Node, energy consumption of the saving base station on carrier wave, so as to reach low-carbon energy-saving are dynamically opened/closed in the change of load Purpose.But the method can be only applied to the energy-conservation of single base station, and adaptive load balancing technology is needed to use to carry out equally loaded, The base station of whole region cannot be directed to carries out the Energy Saving Control of macroscopic view.
In view of above-mentioned technological deficiency, creator of the present invention passes through prolonged research and practice obtains this creation finally.
The content of the invention
The invention aims to solve shortcoming present in prior art, and in a kind of NB-IOT networks for proposing Energy-saving scheduling method.
To achieve these goals, present invention employs following technical scheme, the energy-saving distribution in a kind of NB-IOT networks Method, including：
Step a, when main channel load exceedes threshold value or main channel communication failure, described main control module is first to master Each node is judged in passage, determines that load exceedes the node of threshold value；
Step b, after main channel determines the node that load exceedes threshold value, by node replacement request information transfer to dispatching mould Block；Described scheduler module compensates node and replaces first to load according to main channel more than the node of threshold value or communication failure The solicited message changed, makes control instruction；Described main channel control module completes node and replaces, and according to above-mentioned steps a, weight Newly detected；
Step c, main control module re-starts detection to the passage load and fault message after node replacement, if meeting negative Lotus demand, then send solicited message to described scheduler module, and described scheduler module sends confirmation to main control module； If being unsatisfactory for workload demand after detection, described main control module sends information to described scheduler module, performs step d；
Step d, described scheduler module obtains the information on load of all alternate channels, and carries out redundancy judgement, and selection is negative The minimum alternate channel of lotus；
Step e, main channel module is switched to selected alternate channel module by described scheduler module, then be optimal section Electric load passage.
Further, in above-mentioned steps a, described main control module is sampled by each node to carrier signal And judge, in sampling, continuous N is taken every time1In the individual cycle, sample M1It is secondary, an instantaneous value i is taken within each cycle, according to following Formula carries out calculating Im,
In formula, Im0kRepresent in N1Electric current average amplitude in the individual cycle, ImRepresent and calculate gained current amplitude, N1Represent every Sub-sampling cycle, M1Sampling number of times is represented, w represents signal transmission frequencies, and θ represents initial phase angle, between 0-30 °；K and j tables Show sequence number；
The threshold range I of current amplitude is provided with described main control module1~I2, through the above-mentioned electricity being calculated Stream amplitude ImJudge it whether in predetermined threshold value I1~I2In the range of, if so, then concluding that the current loading of node exceedes threshold value or event Barrier is present, if it is not, then re-start sampling judging.
Further, in above-mentioned steps d, scheduler module includes comparing unit, and described comparing unit is according to following Formula calculates the registration P that the second alternate channel gathers numerical value to the first alternate channel21；
The electric current and voltage signal gathered using alternate channel are judged；
In formula, P21(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that first is standby logical respectively Voltage signal, the current signal of road collection, u2And i2Voltage signal, the electric current letter of the second alternate channel collection are represented respectively Number, T represents mean square deviation computing, and I and I' represent integral operation；
Signal registration P of second alternate channel to the first alternate channel21Calculated according to the following equation；
In formula, M represents sampling group number, and j represents sequence number, P1j(u1,i1) represent described in every group of signal that second is standby logical Signal registration of the road to the first alternate channel.
Further, described comparing unit calculates the 3rd alternate channel and the first alternate channel is gathered according to the following equation The registration P of numerical value31, in the present embodiment, the electric current and voltage signal gathered using alternate channel are judged；
In formula, P31(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that first is standby logical respectively Voltage signal, the current signal of road collection, u3And i3Voltage signal, the electric current letter of the second alternate channel collection are represented respectively Number, T represents mean square deviation computing, and I and I' represent integral operation.
Further, NB-IOT network systems include：Based on the main channel of the NB-IOT transmitting base stations in coverage, hair Base station is penetrated by main channel to terminal transmission NB-IOT signal messages；Based on the standby of the NB-IOT transmitting base stations in coverage Passage group, including based in normal condition, with identical signal intensity, tranmitting frequency and same load first is standby logical Road, the second alternate channel and the 3rd alternate channel；
Also include the strong main control module for being monitored and dispatching of load and signal transmission to each node in main channel.
The present invention, of the invention during energy-saving distribution compared with prior art, preferential to attempt to the node of main channel Compensation is replaced, if power conservation requirement can be reached, continues to carry out signal transmission using main channel, if after compensation is replaced, still can not Meet power conservation requirement, then scheduler module switches to the minimum alternate channel of load.
The present invention carries out macro-control by scheduler module to NB-IOT networks, realizes dual energy-conservation.
Brief description of the drawings
Fig. 1 is the functional block diagram of the energy-conserving scheduling system in NB-IOT networks of the invention；
Fig. 2 is the functional block diagram of the node of the main channel in NB-IOT networks of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
Refer to shown in Fig. 1, it is the functional block diagram of the energy-conserving scheduling system in NB-IOT networks of the invention, the present invention Embodiment is based on NB-IOT networks, and communication range is covered by NB-IOT transmitting base stations.
The NB-IOT network systems of the present embodiment include：
Based on the main channel of the NB-IOT transmitting base stations in coverage, transmitting base station is by main channel to terminal transmission NB-IOT signal messages；
Based on the alternate channel group of the NB-IOT transmitting base stations in coverage, including based in normal condition, have First alternate channel of identical signal intensity, tranmitting frequency and same load, the second alternate channel and the 3rd alternate channel.
Also include the strong main control module for being monitored and dispatching of load and signal transmission to each node in main channel；
The first control module that the load of the first alternate channel is monitored and is dispatched；
The second control module that the load of the second alternate channel is monitored and is dispatched；
The 3rd control module that the load of the 3rd alternate channel is monitored and is dispatched.
Also include carrying out the data of main control module, the first control module, the second control module and the 3rd control module Treatment, the scheduler module being controlled to the node in each passage and main channel.
In embodiments of the present invention, described main channel is the main thoroughfare in transmitting base station coverage, in positive normal open Under letter situation, carried out data transmission by the main thoroughfare；When main channel failure is run into or main channel load is too high, it is necessary to Switch to alternate channel；But, in order to save the energy ezpenditure in NB-IOT network systems, in switching channel, first to main channel Interior malfunctioning node or high energy consumption node compensates node switching.
Incorporated by reference to shown in Fig. 2, the main channel of the present embodiment, including multinode, when there is high energy consumption or failure in node A, It is preferential to attempt to handoff to compensation node K.When compensation node K can not meet energy consumption or main channel can not meet communicating requirement, Switch to alternate channel.
The process of the NB-IOT network energy-saving dispatching methods of the embodiment of the present invention is：
Step a, when main channel load exceedes threshold value or main channel communication failure, described main control module is first to master Each node is judged in passage, determines that load exceedes the node of threshold value.
Described main control module is sampled and judged by each node to carrier signal, in sampling, is taken every time Continuous N1In the individual cycle, sample M1It is secondary, an instantaneous value i is taken within each cycle, carry out calculating I according to the following equationm,
In formula, Im0kRepresent in N1Electric current average amplitude in the individual cycle, ImRepresent and calculate gained current amplitude, N1Represent every Sub-sampling cycle, M1Sampling number of times is represented, w represents signal transmission frequencies, and θ represents initial phase angle, between 0-30 °；K and j tables Show sequence number.
The threshold range I of current amplitude is provided with described main control module1~I2, through the above-mentioned electricity being calculated Stream amplitude ImJudge it whether in predetermined threshold value I1~I2In the range of, if so, then concluding that the current loading of node exceedes threshold value or event Barrier is present, if it is not, then re-start sampling judging.
Step b, after main channel determines the node that load exceedes threshold value, by node replacement request information transfer to dispatching mould Block；Described scheduler module compensates node and replaces first to load according to main channel more than the node of threshold value or communication failure The solicited message changed, makes control instruction；Described main channel control module completes node and replaces, and according to above-mentioned steps a, weight Newly detected.
Step c, main control module re-starts detection to the passage load and fault message after node replacement, if meeting negative Lotus demand, then send solicited message to described scheduler module, and described scheduler module sends confirmation to main control module； If being unsatisfactory for workload demand after detection, described main control module sends information to described scheduler module, performs step d.
Step d, described scheduler module obtains the information on load of all alternate channels, and carries out redundancy judgement, and selection is negative The minimum alternate channel of lotus.Include comparing unit in scheduler module, described comparing unit calculates second according to the following equation Alternate channel gathers the registration P of numerical value to the first alternate channel21, in the present embodiment, using alternate channel gather electric current and Voltage signal is judged；
In formula, P21(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that first is standby logical respectively Voltage signal, the current signal of road collection, u2And i2Voltage signal, the electric current letter of the second alternate channel collection are represented respectively Number, T represents mean square deviation computing, and I and I' represent integral operation；
Signal registration P of second alternate channel to the first alternate channel21Calculated according to the following equation；
In formula, M represents sampling group number, and j represents sequence number, P1j(u1,i1) represent described in every group of signal that second is standby logical Signal registration of the road to the first alternate channel.
Described comparing unit calculates the weight that the 3rd alternate channel gathers numerical value to the first alternate channel according to the following equation Right P31, in the present embodiment, the electric current and voltage signal gathered using alternate channel are judged；
In formula, P31(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that first is standby logical respectively Voltage signal, the current signal of road collection, u3And i3Voltage signal, the electric current letter of the second alternate channel collection are represented respectively Number, T represents mean square deviation computing, and I and I' represent integral operation；
Described comparing unit calculates the weight that the second alternate channel gathers numerical value to the 3rd alternate channel according to the following equation Right P23, in the present embodiment, the electric current and voltage signal gathered using alternate channel are judged；
In formula, P23(u3,i3) represent the registration of every group of electric current and voltage signal, u3And i3Represent that first is standby logical respectively Voltage signal, the current signal of road collection, u2And i2Voltage signal, the electric current letter of the second alternate channel collection are represented respectively Number, T represents mean square deviation computing, and I and I' represent integral operation；
The comparing unit calculates signal registration P of second alternate channel to the first alternate channel21, the 3rd alternate channel To the signal registration P of the first alternate channel31, signal registration P of the 3rd alternate channel to the second alternate channel32。
The alternate channel that the reckling of the absolute value of the difference according to each coincidence angle value is directed to is selected standby logical Road.
If P21、P31Difference absolute value reckling, then the first alternate channel is selected alternate channel.
Step e, main channel module is switched to selected alternate channel module by described scheduler module, then be optimal section Electric load passage.
The present invention is preferential to attempt replacing the compensation of the node of main channel during energy-saving distribution, if section can be reached Can require, then continue to carry out signal transmission using main channel, if after compensation is replaced, can not still meet power conservation requirement, then dispatch mould Block switches to the minimum alternate channel of load.
The present invention carries out macro-control by scheduler module to NB-IOT networks, realizes dual energy-conservation.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.

Claims (5)

1. the energy-saving scheduling method in a kind of NB-IOT networks, it is characterised in that including：
Step a, when main channel load exceedes threshold value or main channel communication failure, described main control module is first to main channel Interior each node judged, determines that load exceedes the node of threshold value；
Step b, after main channel determines the node that load exceedes threshold value, by node replacement request information transfer to scheduler module；Institute The scheduler module stated compensates node replacement first according to the node that main channel exceedes threshold value or communication failure to load Solicited message, makes control instruction；Described main channel control module completes node and replaces, and according to above-mentioned steps a, enters again Row detection；
Step c, main control module re-starts detection to the passage load and fault message after node replacement, if meeting load need Ask, then send solicited message to described scheduler module, described scheduler module sends confirmation to main control module；If inspection Workload demand is unsatisfactory for after survey, then described main control module sends information to described scheduler module, performs step d；
Step d, described scheduler module obtains the information on load of all alternate channels, and carries out redundancy judgement, and selection load is most Low alternate channel；
Main channel module is switched to selected alternate channel module by step e, described scheduler module, then for optimal economize on electricity is negative Lotus passage.
2. the energy-saving scheduling method in NB-IOT networks according to claim 1, it is characterised in that in above-mentioned steps a, Described main control module is sampled and judged by each node to carrier signal, in sampling, continuous N is taken every time1 In the individual cycle, sample M1It is secondary, an instantaneous value i is taken within each cycle, carry out calculating I according to the following equationm,
I m = Σ k = 1 N 1 Σ j = 1 M 1 3 × I m 0 k × s i n ( w t + θ ) N 1 M 1 - - - ( 1 )
In formula, Im0kRepresent in N1Electric current average amplitude in the individual cycle, ImRepresent and calculate gained current amplitude, N1Expression takes every time Sample cycle, M1Sampling number of times is represented, w represents signal transmission frequencies, and θ represents initial phase angle, between 0-30 °；K and j represent sequence Number；
The threshold range I of current amplitude is provided with described main control module1~I2, through the above-mentioned electric current width being calculated Value ImJudge it whether in predetermined threshold value I1~I2In the range of, if so, then concluding that the current loading of node is deposited more than threshold value or failure If it is not, then re-start sampling judging.
3. the energy-saving scheduling method in NB-IOT networks according to claim 1, it is characterised in that in above-mentioned steps d, Scheduler module includes comparing unit, and it is standby to first logical that described comparing unit calculates the second alternate channel according to the following equation Road gathers the registration P of numerical value21；
The electric current and voltage signal gathered using alternate channel are judged；
P 21 ( u 1 , i 1 ) = Σ u 2 , i 2 ( T ( u 2 , i 2 ) * I ′ ( u 1 + u 2 , i 1 + i 2 ) ) Σ u 2 , i 2 T ( u 2 , i 2 ) 2 * Σ u 2 , i 2 I ( u 1 + u 2 , i 1 + i 2 ) 2 - - - ( 2 )
In formula, P21(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that the first alternate channel is adopted respectively The voltage signal of collection, current signal, u2And i2Voltage signal, the current signal of the second alternate channel collection, T are represented respectively Mean square deviation computing is represented, I and I' represent integral operation；
Signal registration P of second alternate channel to the first alternate channel21Calculated according to the following equation；
P 21 ( u , i ) = Σ j = 1 M P 1 j ( u 1 , i 1 ) M - - - ( 3 )
In formula, M represents sampling group number, and j represents sequence number, P1j(u1,i1) represent that the second alternate channel is to the described in every group of signal The signal registration of one alternate channel.
4. the energy-saving scheduling method in NB-IOT networks according to claim 3, it is characterised in that described comparing unit The registration P that the 3rd alternate channel gathers numerical value to the first alternate channel is calculated according to the following equation31, in the present embodiment, use The electric current and voltage signal of alternate channel collection are judged；
P 31 ( u 1 , i 1 ) = Σ u 3 , i 3 ( T ( u 3 , i 3 ) * I ′ ( u 1 + u 3 , i 1 + i 3 ) ) Σ u 3 , i 3 T ( u 3 , i 3 ) 2 * Σ u 3 , i 3 I ( u 1 + u 3 , i 1 + i 3 ) 2 - - - ( 4 )
In formula, P31(u1,i1) represent the registration of every group of electric current and voltage signal, u1And i1Represent that the first alternate channel is adopted respectively The voltage signal of collection, current signal, u3And i3Voltage signal, the current signal of the second alternate channel collection, T are represented respectively Mean square deviation computing is represented, I and I' represent integral operation.
5. the energy-saving scheduling method in NB-IOT networks according to claim 1, it is characterised in that NB-IOT network systems Including：
Based on the main channel of the NB-IOT transmitting base stations in coverage, transmitting base station is by main channel to terminal transmission NB-IOT Signal message；Based on the alternate channel group of the NB-IOT transmitting base stations in coverage, including based in normal condition, have First alternate channel of identical signal intensity, tranmitting frequency and same load, the second alternate channel and the 3rd alternate channel；
Also include the strong main control module for being monitored and dispatching of load and signal transmission to each node in main channel.
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