CN105722016B - It is layered the cooperative control method of gateway and terminal transmission power in M2M network - Google Patents
It is layered the cooperative control method of gateway and terminal transmission power in M2M network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks
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Abstract
A kind of cooperative control method being layered gateway and terminal transmission power in M2M network is suitable for wireless communication field and uses.Wireless communication link is established using full duplex relaying transmission, obtains the channel state parameter of wireless M2M gatewayWith, obtain the channel state parameter of wireless M2M terminalWithThe channel gain in network is calculated afterwards, in the case where meeting the data throughout of each wireless M2M terminal, transmission power control parameter is calculated, to realize the cooperative control method of gateway and terminal transmission power.Terminal is effectively improved to gateway link and gateway to the signal power of base station link and interference noise power ratio i.e. Signal to Interference plus Noise Ratio, to minimize the energy consumption of M2M terminal, meet the minimal time delay requirement of M2M communication, and effectively improve the frequency spectrum resource utilization rate of cellular network.
Description
Technical field
The present invention relates to a kind of cooperative control method more particularly to a kind of Machine To Machine (Machine-to-Machine,
M2M) the cooperative control method for being layered gateway and terminal transmission power in M2M network that wireless communication field uses.
Background technique
Widespread deployment with mobile communications network in the whole world, wireless data service from traditional Human To Human (H2H,
Human to Human) it communicates to the extension of M2M communication field.The prototype of M2M communication be wireless sensor network (WSN,
Wireless Senor Network), refer in the case where no manual intervention, is carried out certainly between multiple network equipments or terminal
Main information exchange.M2M communication is mainly directed towards environment real time monitoring and controls the transmission of data, and application field covers industry
The multiple fields such as automation and intelligent city's power grid, medical treatment and emergency protection, it is Internet of Things (IoT, Internet
OfThings important component).In order to cope with the rapid growth of M2M data service, mobile communication standard tissue 3GPP
Have begun the M2M communication problem and its standardization effort under concern cellular mobile network framework.However, existing honeycomb is mobile
Communication standard (such as LTE and LTE-A) is directed to traditional H2H communication scheme, and M2M communication has very big compared with H2H is communicated
Difference, specifically include that
1) H2H communicates prevailing transmission phonetic image, the multi-medium datas such as video, and transmitted data amount is larger, and (tens MB are to several
GB etc.).M2M communication then prevailing transmission environmental monitoring and control data, volume of transmitted data it is relatively small (tens KB to several MB not
Deng)；High (the frequency for causing communication link to be teared down and built of the frequency is initiated in the but substantial amounts of M2M terminal, communication required by environmental monitoring
Rate is high), and the transmission for controlling data also has higher requirement to time delay；
2) H2H communication relies primarily on cellular downlink (from base station to user terminal) transmission data, under user terminal
Carry music, browsing webpage and video etc..M2M communication is mainly used for environment real time monitoring, therefore relies primarily on cellular uplink
(from M2M terminal to base station) transmission data.When a large amount of M2M terminals issue uplink transmission request to base station simultaneously, it is bound to
Network congestion can be caused；Further, since the volume of transmitted data of single M2M communication link is smaller, a large amount of M2M terminal is established to base
The uplink communication links stood undoubtedly will increase the transport overhead of link control and management information, cause networked communication resource that can not obtain
To effective use；
3) although H2H terminal has the shortcomings that energy consumption is high, battery durable ability is poor, but its battery can very easily charge and
Replacement.And M2M terminal is generally placed at environmental hazard or the unapproachable region of the mankind (such as field massif, underground coal mine
Deng), the work such as auxiliary environment monitoring and disaster alarm are seldom moved, and require to work in the case where unmanned intervene.Cause
This, saves particularly important for M2M terminal and the energy consumption of communication.
In order to cope with above-mentioned challenge brought by M2M communication, a kind of new network equipment, i.e. " M2M gateway " quilt in recent years
It is introduced into cellular network.One group of adjoining M2M terminal of geographical location forms one " M2M group " and by the same M2M net
Pass is managed, and M2M gateway is a part of network infrastructure, it is connected with base station by wireless channel, meanwhile, it can be with
The data that multiple M2M terminals generate are collected and cached, and base station will be forwarded in these data sets.The appearance of M2M gateway makes existing
There is cellular network to become a kind of network architecture of layering, i.e. the uplink of M2M terminal to base station is divided into two parts, including
" terminal to gateway link " and " gateway to base station link ", wherein gateway to base station link uses LTE/LTE-A standard, and
Terminal to gateway link can use LTE/LTE-A standard, or use other wireless network protocols, such as Wi-Fi and
Bluetooth etc..
In the M2M network of above-mentioned layering, need to solve gateway and the distribution of the frequency spectrum resource of multiple terminals in M2M group
Problem, the method that existing document mostly uses quadrature spectrum to be multiplexed solve the problems, such as this, such as:
Document 1:C.Y.Ho and C.-Y.Huang, " Energy-saving massive access control and
resource allocation schemes for M2M communications in OFDMA cellular
networks,”IEEE Commun.Lett.,vol.1,no.3,pp.209–211,2012.
Document 2:C.Zhang, G.Ge, J.Li and Y.Hu, " Performance analysis for mobile-
relay-based M2M two-way AF relaying in N Nakagami-m fading,”IET Electronics
Letters,vol.49,no.5,pp.344-346,Feb.2013.
Document 3:F.Gong, J.Ge, N.Zhang, " SER analysis of the mobile-relay-based M2M
communication over double Nakagami-mfading channels,”IEEE Commun.Lett.,
vol.15,no.1,pp.34-36,Jan.2011.
Document 4: Zhang Guopeng, Li Ao, Du Yao, Zhou Kai, Lin Yude, Jin Wenbin are embedded in high energy efficiency in the cellular network of M2M
Power and slot allocation method, application number 201510624229, applying date 2015.9.25, application for a patent for invention；
In above-mentioned document 1 into document 4, difference is assigned (i.e. in terminal to gateway link and gateway to base station link
It is orthogonal) frequency spectrum resource, wherein document 1 and 2 use frequency division multiplexing method, and document 3 and 4 item use time division multiplexing
Method.Although the method for quadrature spectrum multiplexing will not cause terminal to gateway link and gateway to the total channel of base station link
Transmission interference, but will be greatly reduced the utilization rate of network spectrum resource.It is well known that frequency spectrum resource scarcity is Next generation cellular
One of the Major Systems bottleneck that mobile network faces.In addition, document 4 is using common H2H user terminal as the relaying of M2M communication
Node is only applicable to the small-scale M2M communication environment (the number of terminals < 10 in M2M group) such as family or office, since H2H is used
The calculated performance of family terminal can not cope with the extensive M2M communication (terminal in M2M group far away from dedicated M2M gateway
Number) demand.
Summary of the invention
Shortcoming in view of the above technology provides the terminal in a kind of permission M2M group to gateway link and gateway
To base station link in same frequency range concurrently-transmitted data, and for terminal in M2M group and the collaboration control of the transmission power of gateway
Make the cooperative control method of gateway and terminal transmission power in the layering M2M network of nonopiate spectrum reuse.
To realize the above-mentioned technical purpose, the Collaborative Control for being layered gateway and terminal transmission power in M2M network of the invention
Method constitutes layering M2M network using M2M network system, and the M2M network system includes base station and wireless M2M group, institute
It states wireless M2M group to be made of wireless M2M gateway and a wireless M2M terminal of K (K >=1), each wireless M2M terminal is equipped with one
Branch antenna is respectively provided with signal transmitting and received two antennas for signal on wireless M2M gateway, wherein wireless
M2M gateway is wireless mobile apparatus, and wireless M2M gateway is the relaying section of information connection between K wireless M2M terminals and base station
Point, between wireless M2M gateway and wireless M2M terminal use when, frequency domain full-duplex data relaying technique, allow M2M gateway and appoint
One M2M terminal is in same frequency range concurrently-transmitted data, it is characterised in that the Collaborative Control side of the gateway and terminal transmission power
Steps are as follows for method:
A. starting M2M network system construction is layered M2M network: establishing wireless M2M gateway using control information transmission channel
Link between base station, is K wireless M2M terminal definitions tag numbers in M2M group, and K wireless M2M terminals pass through bee
Nest network-based control information transmission channel (SDCCH, Stand-Alone Dedicated Control Channel) is to wireless
M2M gateway sends data transfer request；After wireless M2M gateway receives the data transfer request message that wireless M2M terminal issues
Solicited message is forwarded to base station by SDCCH channel；Base station according to received in preset cooler cycle time institute whether there is or not
After line M2M gateway data transmits solicited message, the data that K channel is used for transmission K M2M terminal, base station are distributed for M2M gateway
It is each channel order number that total channel, which is divided into after K channel, and base station believes K distribution channel information using SDCCH
Road feeds back to wireless M2M gateway and is forwarded to K M2M terminal, i.e., i-th of channel distribution is carried out data to i-th of M2M terminal
Transmission；
B. according to LTE/LTE-A cellular network radio link control (RLC, Radio LinkControl), Mei Gewu
Line M2M terminal establishes wireless communication link by distributed channel and wireless M2M gateway, and wireless M2M gateway and base station are established
Wireless communication link；
C. the CPICH Common Pilot Channel (CPICH, Common PilotChannel) that wireless M2M gateway is provided by LTE network
And Dedicated Physical Control Channel (DPCCH, Dedicated Physical Control Channel) obtains its own and base
Active channel state parameter h between standingG,BAnd hG,G, each channel that wirelessly M2M terminal is obtained itself by SDCCH channel
State parameter hi,GAnd hi,B, and wireless M2M gateway, h are fed back to after enclosing itself number labeli,BIt is M2M terminal itself and base station
The channel state parameter of working channel, hi,GIt is that each wireless M2M terminal obtains its own and wireless M2M gateway working channel
Channel status；
D. wireless M2M gateway calculates channel gain parameter: due between wireless M2M gateway and wireless M2M terminal with parallel
The mode of transmitting carries out radio broadcasting, and the data that the transmitting of wireless M2M terminal can receive wireless M2M gateway to base station cause total letter
Road interference, therefore the link between wireless M2M terminal and base station be can be regarded as into an interfering link, wireless M2M gateway benefit
With formula:Calculate the channel gain γ of interfering link between any i-th wireless M2M terminal and base stationI, B, benefit
With formula:Calculate the channel gain γ of interfering link between i-th of wireless M2M terminal and wireless M2M gatewayi,G,
Utilize formulaCalculate the channel gain γ between wireless M2M gateway and base stationG,B, utilize formula
It calculates the transmitting antenna of wireless M2M gateway itself and receives the channel gain γ between electric wireS,I, n in formulaBIt is base station receiver
Noise coefficient, nGIt is the noise coefficient of M2M gateway receiver, hS,IIt is channel coefficients of the M2M net transmitter to receiver；
E. wireless M2M gateway passes through the channel state parameter h that line M2M terminal is fed backi,GAnd hi,B, utilize formula: Calculate transmission power parameter required for i-th of wireless M2M terminal of control
Wireless M2M gateway utilizes formula:It calculates and controls wireless M2M
The transmission power parameter of gateway itselfWireless M2M gateway uses powerThe data of i-th of wireless M2M terminal are relayed, in formulaNeed the bit data transmitted to base station for i-th of M2M terminal in transmission cycle T, w be distribute to i-th (i=1,2 ...,
K) the transmission bandwidth of a M2M terminal；
F. wireless M2M gateway passes through judgement: when the actual emission power of i-th of wireless M2M terminalIt is wireless with i-th
The specified maximum transmission power P of M2M terminalMRelationship beAnd the actual emission power parameter of wireless M2M gateway
It is the specified maximum transmission power P of data for relaying i-th of wireless M2M terminal with wireless M2M gatewayGRelationship beWhen,
Then the optimum transmission power of i-th of wireless M2M terminal is arranged in wireless M2M gatewayI-th of wireless M2M of setting relaying is whole
The optimum transmission power of end dataOtherwise, whenOrWhen, then wireless M2M gateway setting i-th
The optimum transmission power of a wireless M2M terminal isThe optimal transmitting function of i-th of wireless M2M terminal data of relaying is set
Rate is
G. wireless M2M gateway is successively directed to each wireless M2M terminal repetition step f and obtains all K wireless M2M terminals
Optimal power control strategyAnd by optimal power control strategyIt is anti-respectively
All wireless M2M terminals of corresponding number of feeding are to complete primary wireless M2M gateway and wireless M2M terminal transmission power
Collaborative Control process；
H. step a is repeated as needed starts next data transfer cycle.
Management node of the wireless M2M gateway as wireless M2M group is responsible for collecting all wireless in group
The data transfer request message of M2M terminal is simultaneously forwarded to base station, is finally each wireless M2M terminal distribution transmission channel by base station,
The allocation result first gives wireless M2M gateway by base station feedback, then feeds back to each wireless M2M terminal by wireless M2M gateway.
For the layering M2M network in LTE/LTE-A cellular network, each data transmission channel is that 1 bandwidth is
Orthogonal frequency division multiplexing (OFDMA, Orthogonal Frequency Division Multiple Access) sub- load of 180KHz
Wave, any i-th of wireless M2M terminal distributes 1 channel for data transmission by system in system；Wireless M2M gateway can be in K
Data are sended and received simultaneously on a channel, specially wireless M2M gateway is using full duplex relaying agreement in i-th of wireless M2M
Received on the channel of terminal works its data and by the data on the same channel Parallel transmutation to base station.
Preset data transmission cycle T, transmission cycle T are that the real-time demand of wireless M2M transmission services adjusts, if each
M2M terminal needs to complete the transmission of at least 10Kb data in every 1 second, then data transfer cycle T is set to 1 second, described any
The data throughout that i-th of wireless M2M terminal obtains in data transfer cycle T are as follows:, nothing
The data throughout obtained on line M2M gateway and the channel of i-th of wireless M2M terminal works are as follows:
The layering M2M network system meets the handling capacity of any i-th wireless M2M terminal under the premise of energy consumption is the smallest
DemandAnd maximum delay restricted T, optimal mathematical modeling are as follows:
Constraint condition:
Wireless M2M gateway obtains the parameter for controlling wireless M2M terminal and wireless M2M gateway own transmission powerWith
When the parameter of any i-th wireless M2M terminalOr parameterWhen, show given delay constraint
T and specified maximum transmission power constrain PMAnd PG, then there is no energy consumption it is the smallest under the premise of to meet any i-th wireless M2M whole
The throughput demand at endAnd the optimal mathematical modeling of maximum delay restricted T, i.e., the data transmission of i-th wireless M2M terminal
DemandIt can not be met by system in the data transfer cycle, therefore, wireless M2M gateway is optimal by i-th wireless M2M terminal
Transmission power is set asIt will be set as the optimum transmission power for relaying i-th of wireless M2M terminal data
Achieve the purpose that i-th of wireless M2M terminal is delayed to carry out data transmission.
The utility model has the advantages that the M2M cellular network architecture of control method of the invention for layering, it is whole to be suitable for extensive M2M
The data at end are transmitted, and transmission is transmitted using full duplex relaying, allow terminal in M2M group to gateway link and gateway to base
It stands link concurrently-transmitted data in same frequency range, effectively improves the frequency spectrum resource utilization rate of cellular network；By adjusting transmitting
Power can be effectively improved terminal to gateway link and gateway to the signal power of base station link and interference noise power ratio
That is Signal to Interference plus Noise Ratio, thus the minimal time delay requirement for minimizing the energy consumption of M2M terminal, meeting M2M communication.
Detailed description of the invention
Fig. 1 is layering M2M beehive network system composition schematic diagram of the invention；
Fig. 2 is transmission channel and transmission power distribution schematic diagram of the invention；
Fig. 3 is that the propagation delay time demand of wireless M2M terminal of the invention is satisfied the schematic diagram of probability；
Fig. 4 is all wireless M2M terminal transmission energy consumption schematic diagram of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is done further with reference to the accompanying drawing
Detailed description.
As shown in Figure 1, in layering M2M network of the invention gateway and terminal transmission power cooperative control method,
It is preferably compatible with extensive M2M communication in cellular mobile network, introduces a kind of new network equipment " M2M gateway ", divides to be formed
The cellular network architecture of layer；Layering M2M network is constituted using M2M network system, the M2M network system includes base station and nothing
Line M2M group, the wireless M2M group are made of wireless M2M gateway and a wireless M2M terminal of K (K >=1), each wireless M2M
Terminal is equipped with an antenna, and signal transmitting and received two days for signal are respectively provided on wireless M2M gateway
Line, wherein wireless M2M gateway is wireless mobile apparatus, and wireless M2M gateway is that information connects between K wireless M2M terminals and base station
The relay node connect, between wireless M2M gateway and wireless M2M terminal use when, frequency domain full-duplex data relaying technique, allow
M2M gateway and any M2M terminal in same frequency range concurrently-transmitted data,
Wireless M2M gateway is connected by the wireless channel wireless M2M terminal adjoining with base station and one group of geographical location,
It is responsible for the wireless M2M terminal that management is connected, and the data for collecting, caching wireless M2M terminal generation again will be in these data sets
It is forwarded to base station, base station, M2M gateway and K wireless M2M terminals constitute the overall network equipment of system, and wireless M2M gateway is made
For the relay node between the wireless M2M terminals of K and base station, when use, frequency domain full-duplex data relaying technique, allow wireless
M2M gateway and any M2M terminal are in same frequency range concurrently-transmitted data；Wireless M2M gateway uses frequency division multiple access (FDMA) technology
Media access contorl is carried out to K wireless M2M terminals, the occupied spectral bandwidth of system is indicated with W (unit Hz), with T (unit
S) data transfer cycle (i.e. the period of network system frequency spectrum resource distribution and transmission power control) of wireless M2M group is indicated,
In any data transfer cycle T, network system distributes to the transmission bandwidth of i-th (i=1,2 ..., K) a wireless M2M terminal
For w=W/K (unit Hz), wireless M2M gateway and K M2M terminal when, frequency domain resource allocation model it is as shown in Figure 2；With
hi,GIt indicates the channel coefficients between i-th of wireless M2M terminal and M2M gateway, uses hi,BIndicate i-th of wireless M2M terminal and base
Channel coefficients between standing, use hG,BIt indicates the channel coefficients between wireless M2M gateway and base station, uses hG,GIndicate wireless M2M net
Channel coefficients between the transmitting antenna and reception electric wire of pass, use nBThe additive white Gaussian noise for indicating base station receiver, uses nGTable
Show the additive white Gaussian noise of wireless M2M gateway, it is assumed that all channel coefficients and receiver noise are kept in T in network system
It is constant；In any data transfer cycle T, i-th of wireless M2M terminal needs to transmit to base stationBit data, as relaying
Node, on the one hand data that wireless M2M gateway needs to receive K wireless M2M terminals are (totalBit), it is another
Aspect is needed this LGBit data is forwarded to base station；WithThe transmission power for indicating i-th of wireless M2M terminal, uses PMIt indicates
I-th of wireless available maximum transmission power of M2M terminal；WithIndicate that wireless M2M gateway is the number for relaying i-th of M2M terminal
According to used transmission power, P is usedGIndicate that wireless M2M gateway is the available emission maximum of data for relaying i-th of M2M terminal
Power；It is as follows to the transmission power cooperative control method process of wireless M2M gateway and K wireless M2M terminals in system:
A. starting M2M network system construction is layered M2M network: establishing wireless M2M gateway using control information transmission channel
Link between base station, is K wireless M2M terminal definitions tag numbers in M2M group, and K wireless M2M terminals pass through bee
Nest network-based control information transmission channel (SDCCH, Stand-Alone Dedicated Control Channel) is to wireless
M2M gateway sends data transfer request；After wireless M2M gateway receives the data transfer request message that wireless M2M terminal issues
Solicited message is forwarded to base station by SDCCH channel；Base station according to received in preset cooler cycle time institute whether there is or not
After line M2M gateway data transmits solicited message, the data that K channel is used for transmission K M2M terminal, base station are distributed for M2M gateway
It is each channel order number that total channel, which is divided into after K channel, and base station believes K distribution channel information using SDCCH
Road feeds back to wireless M2M gateway and is forwarded to K M2M terminal, i.e., i-th of channel distribution is carried out data to i-th of M2M terminal
Transmission；
B. according to LTE/LTE-A cellular network radio link control (RLC, Radio LinkControl), Mei Gewu
Line M2M terminal establishes wireless communication link by distributed channel and wireless M2M gateway, and wireless M2M gateway and base station are established
Wireless communication link；
C. CPICH Common Pilot Channel (CPICH, the Common Pilot that wireless M2M gateway is provided by LTE network
Channel) and Dedicated Physical Control Channel (DPCCH, Dedicated Physical Control Channel) obtains it
Itself active channel state parameter h between base stationG,BAnd hG,G, each wireless M2M terminal is obtained itself by SDCCH channel
The channel state parameter h takeni,GAnd hi,B, and wireless M2M gateway, h are fed back to after enclosing itself number labeli,BM2M terminal from
The channel state parameter of body and base station operation channel, hi,GIt is that each wireless M2M terminal obtains its own and wireless M2M gateway work
Make the channel status of channel；
D. wireless M2M gateway calculates channel gain parameter: due between wireless M2M gateway and wireless M2M terminal with parallel
The mode of transmitting carries out radio broadcasting, and the data that the transmitting of wireless M2M terminal can receive wireless M2M gateway to base station cause total letter
Road interference, therefore the link between wireless M2M terminal and base station be can be regarded as into an interfering link, wireless M2M gateway benefit
With formula:Calculate the channel gain γ of interfering link between any i-th wireless M2M terminal and base stationI, B, benefit
With formula:Calculate the channel gain γ of interfering link between i-th of wireless M2M terminal and wireless M2M gatewayi,G,
Utilize formulaCalculate the channel gain γ between wireless M2M gateway and base stationG,B, utilize formula
It calculates the transmitting antenna of wireless M2M gateway itself and receives the channel gain γ between electric wireS,I, n in formulaBIt is base station receiver
Noise coefficient, nGIt is the noise coefficient of M2M gateway receiver, hS,IIt is channel coefficients of the M2M net transmitter to receiver；
E. wireless M2M gateway passes through the channel state parameter h that line M2M terminal is fed backi,GAnd hi,B, utilize formula: Calculate transmission power parameter required for i-th of wireless M2M terminal of control
Wireless M2M gateway utilizes formula:It is wireless to calculate control
The transmission power parameter of M2M gateway itselfWireless M2M gateway uses powerThe data of i-th of wireless M2M terminal are relayed,
In formulaNeed the bit data transmitted to base station for i-th of M2M terminal in transmission cycle T, w be distribute to i-th (i=1,
2 ..., K) a M2M terminal transmission bandwidth；
F. wireless M2M gateway passes through judgement: when the actual emission power of i-th of wireless M2M terminalIt is wireless with i-th
The specified maximum transmission power P of M2M terminalMRelationship beAnd the actual emission power parameter of wireless M2M gateway
It is the specified maximum transmission power P of data for relaying i-th of wireless M2M terminal with wireless M2M gatewayGRelationship beWhen,
Then the optimum transmission power of i-th of wireless M2M terminal is arranged in wireless M2M gatewayI-th of wireless M2M of setting relaying is whole
The optimum transmission power of end dataOtherwise, whenOrWhen, then wireless M2M gateway setting i-th
The optimum transmission power of a wireless M2M terminal isThe optimal transmitting function of i-th of wireless M2M terminal data of relaying is set
Rate is
G. wireless M2M gateway is successively directed to each wireless M2M terminal repetition step f and obtains all K wireless M2M terminals
Optimal power control strategyAnd by optimal power control strategyIt is anti-respectively
All wireless M2M terminals of corresponding number of feeding are to complete primary wireless M2M gateway and wireless M2M terminal transmission power
Collaborative Control process；
H. step a is repeated as needed starts next data transfer cycle.
Management node of the wireless M2M gateway as wireless M2M group is responsible for collecting all wireless in group
The data transfer request message of M2M terminal is simultaneously forwarded to base station, is finally each wireless M2M terminal distribution transmission channel by base station,
The allocation result first gives wireless M2M gateway by base station feedback, then feeds back to each wireless M2M terminal by wireless M2M gateway；
For the layering M2M network in LTE/LTE-A cellular network, each data transmission channel is that 1 bandwidth is
Orthogonal frequency division multiplexing (OFDMA, Orthogonal Frequency Division Multiple Access) sub- load of 180KHz
Wave, any i-th of wireless M2M terminal distributes 1 channel for data transmission by system in system；Wireless M2M gateway can be in K
Data are sended and received simultaneously on a channel, specially wireless M2M gateway is using full duplex relaying agreement in i-th of wireless M2M
Received on the channel of terminal works its data and by the data on the same channel Parallel transmutation to base station.
Preset data transmission cycle T, transmission cycle T are that the real-time demand of wireless M2M transmission services adjusts, if each
M2M terminal needs to complete the transmission of at least 10Kb data in every 1 second, then data transfer cycle T is set to 1 second, described any
The data throughout that i-th of wireless M2M terminal obtains in data transfer cycle T are as follows:, nothing
The data throughout obtained on line M2M gateway and the channel of i-th of wireless M2M terminal works are as follows:
The layering M2M network system meets the handling capacity of any i-th wireless M2M terminal under the premise of energy consumption is the smallest
DemandAnd maximum delay restricted T, optimal mathematical modeling are as follows:
Constraint condition:
Wireless M2M gateway obtains the parameter for controlling wireless M2M terminal and wireless M2M gateway own transmission powerWith
When the parameter of any i-th wireless M2M terminalOr parameterWhen, show given delay constraint
T and specified maximum transmission power constrain PMAnd PG, then there is no energy consumption it is the smallest under the premise of to meet any i-th wireless M2M whole
The throughput demand at endAnd the optimal mathematical modeling of maximum delay restricted T, i.e., the data transmission of i-th wireless M2M terminal
DemandCan not be met by system in the data transfer cycle, therefore, wireless M2M gateway by i-th of wireless M2M terminal most
Excellent transmission power is set asIt will be set as the optimum transmission power for relaying i-th of wireless M2M terminal dataAchieve the purpose that i-th of wireless M2M terminal is delayed to carry out data transmission.
Specific embodiment and its performance evaluation is described below: the layering M2M cellular system structural representation provided referring to Fig.1
Figure, make following system parameter setting: the wireless M2M group in system shares 20 wireless M2M terminals, and wireless M2M communication is allowed
Largest data transfer time delay (i.e. the frequency spectrum of system, transmission power resource allocation cycle) be T=1s, the occupied bandwidth of system
For W=180 × K=180 × 20=3.6KHz, the receiver noise variance of base station and wireless M2M gateway is 10-7；Base station and nothing
The distance of line M2M gateway changes at random between 500m and 1000m, each wireless M2M terminal at a distance from wireless M2M gateway
50m to changing at random between 100m, the large scale path fading 0.097/d of each channel3.76, wherein d is transmitter and receiver
The distance between；The maximum transmission power of M2M gateway is PG=24dBmW, the maximum transmission power of each M2M terminal are PM=
14dBmW.In emulation experiment, in each data transfer cycle T, the data throughout demand of each M2M terminal is from 10Kbits
Increase to 130Kbits, the self-interference link channel gain value of M2M gateway is set as γSI={ 0dB, 5dB, 10dB, 15dB }, and
With perfect condition γSI=0 (self-interference is not present i.e. between the transmitting antenna and receiving antenna of M2M gateway) is joined as optimal performance
According to.
As shown in figure 3, being continuously increased with wireless M2M terminal data throughput demand, using proposed by the invention
The propagation delay time of frequency spectrum resource distribution and power control scheme, each wireless M2M terminal is satisfied the schematic diagram of probability, with wireless
M2M terminal data throughput demand is continuously increased, and the probability that the propagation delay time of each wireless M2M terminal is satisfied constantly drops
It is low, when the self-interference link channel gain of M2M gateway is limited in γSIWhen≤5dB or less, using scheme proposed by the invention
It is capable of the propagation delay time requirement for meeting wireless M2M terminal of higher degree.
As shown in figure 4, being continuously increased with wireless M2M terminal data throughput demands, using proposed by the invention
Frequency spectrum resource distribution and power control scheme show that all wireless M2M terminal completes data transmission consumption energy, with wireless M2M
Terminal data throughput demand is continuously increased, and is completed energy consumed by total data transmission and is continuously increased, when wireless M2M net
The self-interference link channel gain of pass is limited in γSIWhen≤5dB or less, connect using the energy consumption of scheme proposed by the invention
It is bordering on system optimal performance (i.e. γSI=0 System performance profiles).
Claims (6)
1. the cooperative control method of gateway and terminal transmission power, is constituted using M2M network system and is divided in a kind of layering M2M network
Layer M2M network, the M2M network system includes base station and wireless M2M group, and the wireless M2M group is by wireless M2M gateway
And K, K >=1 is wireless, and M2M terminal forms, and each wireless M2M terminal is equipped with an antenna, is respectively equipped on wireless M2M gateway
For signal transmitting and for received two antennas of signal, wherein wireless M2M gateway is wireless mobile apparatus, wireless M2M
Gateway is the relay node of information connection between K wireless M2M terminals and base station, between wireless M2M gateway and wireless M2M terminal
Using when, frequency domain full-duplex data relaying technique, allow M2M gateway and any M2M terminal in same frequency range concurrently-transmitted data,
It is characterized in that steps are as follows for the cooperative control method of the gateway and terminal transmission power:
A. starting M2M network system construction is layered M2M network: establishing wireless M2M gateway and base using control information transmission channel
Link between standing, is K wireless M2M terminal definitions tag numbers in M2M group, and K wireless M2M terminals pass through Cellular Networks
The control information transmission channel (SDCCH, Stand-Alone Dedicated Control Channel) of network is to wireless M2M net
It closes and sends data transfer request；Wireless M2M gateway will request after receiving the data transfer request message that wireless M2M terminal issues
Information is forwarded to base station by SDCCH channel；Base station is according to all wireless M2M nets received in preset cooler cycle time
After closing data transfer request message, the data that K channel is used for transmission K M2M terminal are distributed for M2M gateway, base station will always believe
Road is each channel order number after being divided into K channel, and K distribution channel information is utilized SDCCH channel feedback by base station
To wireless M2M gateway and it is forwarded to K M2M terminal, i.e., is carried out data transmission i-th of channel distribution to i-th of M2M terminal；
B. each wireless according to LTE/LTE-A cellular network radio link control (RLC, Radio Link Control)
M2M terminal establishes wireless communication link by distributed channel and wireless M2M gateway, and nothing is established in wireless M2M gateway and base station
Line communication link；
C. the CPICH Common Pilot Channel (CPICH, Common Pilot Channel) that wireless M2M gateway is provided by LTE network with
And Dedicated Physical Control Channel (DPCCH, Dedicated Physical Control Channel) obtains its own and base station
Between active channel state parameter hG, BAnd hG, G, each channel shape that wirelessly M2M terminal itself will be obtained by SDCCH channel
State parameter hI, GAnd hI, B, and wireless M2M gateway, h are fed back to after enclosing itself number labelI, BIt is M2M terminal itself and base station work
Make the channel state parameter of channel, hI, GIt is the letter that each wireless M2M terminal obtains its own and wireless M2M gateway working channel
Road state；
D. wireless M2M gateway calculates channel gain parameter: due between wireless M2M gateway and wireless M2M terminal with transmitted in parallel
Mode carry out radio broadcasting, the data that the transmitting of wireless M2M terminal can receive wireless M2M gateway to base station cause total channel dry
It disturbs, therefore the link between wireless M2M terminal and base station be can be regarded as into an interfering link, wireless M2M gateway utilizes public affairs
Formula:Calculate the channel gain γ of interfering link between any i-th wireless M2M terminal and base stationI, B, utilize public affairs
Formula:Calculate the channel gain γ of interfering link between i-th of wireless M2M terminal and wireless M2M gatewayI, G, utilize
FormulaCalculate the channel gain γ between wireless M2M gateway and base stationG, B, utilize formulaCalculate nothing
Channel gain γ between the transmitting antenna and reception electric wire of line M2M gateway itselfS,I, n in formulaBIt is the noise of base station receiver
Coefficient, nGIt is the noise coefficient of M2M gateway receiver, hS, IIt is channel coefficients of the M2M net transmitter to receiver；
E. wireless M2M gateway passes through the channel state parameter h that line M2M terminal is fed backI, GAnd hI, B, utilize formula: Calculate transmission power parameter required for i-th of wireless M2M terminal of control
Wireless M2M gateway utilizes formula:It calculates and controls wireless M2M gateway
The transmission power parameter of itselfWireless M2M gateway uses powerThe data of i-th of wireless M2M terminal are relayed, in formula
The bit data transmitted to base station is needed for i-th of M2M terminal in transmission cycle T, w is to distribute to i-th (i=1,2 ..., K)
The transmission bandwidth of a M2M terminal；
F. wireless M2M gateway passes through judgement: when the actual emission power of i-th of wireless M2M terminalIt is whole with i-th of wireless M2M
Hold specified maximum transmission power PMRelationship beAnd the actual emission power parameter of wireless M2M gatewayWith nothing
Line M2M gateway is the specified maximum transmission power P of data for relaying i-th of wireless M2M terminalGRelationship beWhen, then without
The optimum transmission power of i-th of wireless M2M terminal is arranged in line M2M gatewaySetting i-th of wireless M2M number of terminals of relaying
According to optimum transmission powerOtherwise, whenOrWhen, then i-th of nothing is arranged in wireless M2M gateway
The optimum transmission power of line M2M terminal isBe arranged relaying i-th of wireless M2M terminal data optimum transmission power be
G. wireless M2M gateway is successively directed to each wireless M2M terminal repetition step f and obtains the optimal of all K wireless M2M terminals
Power control strategyAnd by optimal power control strategyIt feeds back to respectively
All wireless M2M terminals of corresponding number are to complete once the wirelessly collaboration of M2M gateway and wireless M2M terminal transmission power
Control flow；
H. step a is repeated as needed starts next data transfer cycle.
2. being layered the cooperative control method of gateway and terminal transmission power in M2M network according to claim 1, feature exists
In: management node of the wireless M2M gateway as wireless M2M group is responsible for collecting all wireless M2M terminals in group
Data transfer request message and be forwarded to base station, finally by base station be each wireless M2M terminal distribution transmission channel, optimal power
Control strategyWireless M2M gateway first is given by base station feedback, then each nothing is fed back to by wireless M2M gateway
Line M2M terminal.
3. being layered the cooperative control method of gateway and terminal transmission power in M2M network according to claim 1, feature exists
In: the layering M2M network in LTE/LTE-A cellular network, each data transmission channel be 1 bandwidth be 180KHz just
Frequency division multiplexing (OFDMA, Orthogonal Frequency Division Multiple Access) subcarrier is handed over, in system
Any i-th of wireless M2M terminal is distributed 1 channel by system and is transmitted for data；Wireless M2M gateway can be on K channel
Data are sended and received simultaneously, specially wireless M2M gateway is using full duplex relaying agreement in i-th of wireless M2M terminal works
Channel on receive its data and by the data on the same channel Parallel transmutation to base station.
4. being layered the cooperative control method of gateway and terminal transmission power in M2M network according to claim 1, feature exists
In: preset data transmission cycle T, transmission cycle T are that the real-time demand of wireless M2M transmission services adjusts, if each M2M is whole
End needs to complete the transmission of at least 10Kb data in every 1 second, then data transfer cycle T is set to 1 second, described to pass in any data
The data throughout that i-th of wireless M2M terminal obtains in defeated cycle T are as follows:Wireless M2M net
Close the data throughout obtained on the channel with i-th of wireless M2M terminal works are as follows: Formula
In:It indicates the transmission power of i-th of M2M terminal, usesIndicate that M2M gateway is made by the data of i-th of M2M terminal of relaying
Transmission power.
5. the cooperative control methods of gateway and terminal transmission power, special according to claim 1 or in the 4 layering M2M networks
Sign is: the layering M2M network system meets the handling capacity of any i-th wireless M2M terminal under the premise of energy consumption is the smallest
DemandAnd maximum delay restricted T, optimal mathematical modeling are as follows:
Constraint condition:
Wireless M2M gateway obtains the parameter for controlling wireless M2M terminal and wireless M2M gateway own transmission powerWith
6. being layered the cooperative control method of gateway and terminal transmission power in M2M network according to claim 4, feature exists
In: when the parameter of any i-th wireless M2M terminalOr parameterWhen, show given delay constraint T and
Specified maximum transmission power constrains PMAnd PG, then there is no energy consumption it is the smallest under the premise of meet any i-th wireless M2M terminal
Throughput demandAnd the optimal mathematical modeling of maximum delay restricted T, i.e., the data transfer demands of i-th wireless M2M terminalIt can not be met by system in the data transfer cycle, therefore, wireless M2M gateway is by the optimal transmitting of i-th of wireless M2M terminal
Power setting isIt will be set as the optimum transmission power for relaying i-th of wireless M2M terminal dataReach
The purpose for delaying i-th of wireless M2M terminal to carry out data transmission.
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| CN106209316B (en) * | 2016-07-12 | 2019-01-29 | 东南大学 | A kind of multi-user test method in M2M communication based on CDMA |
| CN106533496B (en) * | 2016-12-30 | 2019-07-23 | 西安交通大学 | A kind of unreliable relaying duplex communication method based on interference cooperation |
| CN110546958B (en) * | 2017-05-18 | 2022-01-11 | 驾优科技公司 | Apparatus, system and method for wireless multilink vehicle communication |
| CN107484111B (en) * | 2017-08-29 | 2021-05-11 | 重庆邮电大学 | M2M communication network association and power distribution algorithm |
| CN108282762B (en) * | 2018-01-30 | 2020-06-26 | 中国人民解放军陆军工程大学 | LTE-A network large-scale M2M communication uplink data transmission method |
| CN108712755B (en) * | 2018-05-18 | 2021-02-26 | 浙江工业大学 | Non-orthogonal access uplink transmission time optimization method based on deep reinforcement learning |
| CN111667381B (en) * | 2020-06-17 | 2023-02-24 | 南方电网科学研究院有限责任公司 | Power transmission line corridor communication coverage and data transmission method |
| CN112152685B (en) * | 2020-09-28 | 2022-02-01 | 展讯通信（上海）有限公司 | Site, AP, channel state information feedback, beam forming method and storage medium |
| CN117896810B (en) * | 2024-03-15 | 2024-05-07 | 江苏中濠建设工程有限公司 | Automatic energy-saving control system and method for intelligent building network equipment |
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