CN110049540B - User terminal cooperation and power distribution method in smart home - Google Patents

User terminal cooperation and power distribution method in smart home Download PDF

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CN110049540B
CN110049540B CN201810042143.7A CN201810042143A CN110049540B CN 110049540 B CN110049540 B CN 110049540B CN 201810042143 A CN201810042143 A CN 201810042143A CN 110049540 B CN110049540 B CN 110049540B
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user terminal
calculating
intelligent
smart device
power
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CN110049540A (en
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汪莹
刘紫健
施展
亢中苗
陈辉煌
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Electric Power Dispatch Control Center of Guangdong Power Grid Co Ltd
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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
    • 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
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a user terminal cooperation and power distribution method in an intelligent home, which comprises the following steps: s1, calculating power gain between a user terminal i and an intelligent device j; s2, calculating a signal to interference plus noise ratio between the user terminal i and the intelligent equipment j; s3, calculating an available rate between the user terminal i and the intelligent equipment j; s4, calculating a network utility function; s5, calculating the optimal cooperation number between the user terminal i and the intelligent equipment j; and S6, calculating the minimum transmitting power of the user terminal i. According to the invention, by researching user cooperation and power distribution based on the intelligent home communication system, load balance constraint, energy collection, user quality service (QoS) requirement and energy efficiency are comprehensively considered, the optimal cooperation number between the user terminal and the intelligent equipment and the minimum transmitting power of the user terminal are obtained, so that the parallel transmission opportunities among all nodes in the network are properly and fully used, and the capacity of the intelligent home network is improved.

Description

User terminal cooperation and power distribution method in smart home
Technical Field
The invention relates to the technical field of communication, in particular to a user terminal cooperation and power distribution method in an intelligent home.
Background
The intelligent home is also called as an intelligent home, which is a living environment with a home as a platform and an intelligent home system, and integrates facilities related to home life by utilizing a comprehensive wiring technology, a network communication technology, a safety precaution technology, an automatic control technology and an audio and video technology. Generally speaking, it is an efficient management system for household facilities and family schedule affairs. In the intelligent home control system, the problems of troublesome wiring of a wired network, more network nodes, huge number of used cables and the like can be solved by adopting a wireless network technology, the communication characteristics of simplicity, flexibility, modularization, expansibility and independence of a home network are better met, and the application of the wireless network technology to the home network has become a mainstream trend.
At present, parallel transmission opportunities among all nodes in a network are not fully used, the capacity of an intelligent home network is insufficient, and a new user cooperation and power distribution mechanism is fundamentally lacked.
Disclosure of Invention
The invention provides a user cooperation and power distribution method in an intelligent home, aiming at overcoming the problem of insufficient utilization of a parallel transmission opportunity in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
A user terminal cooperation and power distribution method in smart home comprises the following steps:
s1, calculating power gain between a user terminal i and an intelligent device j;
s2, calculating a signal to interference plus noise ratio between the user terminal i and the intelligent equipment j;
s3, calculating an available rate between the user terminal i and the intelligent equipment j;
s4, calculating a network utility function;
s5, calculating the optimal cooperation number between the user terminal i and the intelligent equipment j;
and S6, calculating the minimum transmitting power of the user terminal i.
Preferably, said step S1 is for calculating g representing a power gain between the user terminal i and the smart device jijThe following formula is adopted:
Figure GDA0003207729530000021
wherein
Figure GDA0003207729530000022
For transmission between a user terminal i and a smart device jThe gain of the antenna is increased by the gain of the antenna,
Figure GDA0003207729530000023
for the acceptance antenna gain between the user terminal i and the smart device j,
Figure GDA0003207729530000027
is a wavelength, dijThe distance between the user terminal i and the intelligent device j is d0 is a reference distance, and eta is a path loss parameter (eta belongs to [2, 6 ]])。
Preferably, in step S2, to calculate the signal-to-interference-plus-noise ratio between the user terminal i and the smart device j, the following formula is adopted:
Figure GDA0003207729530000024
wherein the SINRijFor the signal to interference plus noise ratio, p, between the user terminal i and the smart device j ijIs the transmission power between the user terminal i and the smart device j, W is defined as the system bandwidth, σ2Is additive white gaussian noise.
Preferably, in step S3, in order to calculate the rate between the user terminal i and the smart device j, a shannon formula is utilized:
Figure GDA0003207729530000025
wherein C isijFor the rate, K, between user terminal i and smart device jjIs the total number of user terminals, SINR, cooperating with the intelligent device jijIs the signal to interference-to-white ratio, so that each user terminal can receive 1/K of the total frequency band availablej。
Preferably, the step S4 is performed according to the speed C between the user terminal i and the smart device jijAnd calculating a network utility function by power consumption, and adopting the following formula:
Figure GDA0003207729530000026
wherein D represents the total network utility of the system, CijFor the rate between the user terminal i and the smart device j, to simplify the complexity of the constructed function, log (throughput)/power consumption is used as the network utility function; based on the characteristics of a log function, when a log (throughput)/power consumption definition cooperation rule is used, more users in the intelligent home are cooperated with the intelligent equipment; thus, load balancing and energy efficiency of the system can be achieved.
Preferably, in step S5, in order to calculate the optimal number of cooperations between the user terminal i and the smart device j, the following formula is adopted through lagrangian dual decomposition:
Figure GDA0003207729530000031
Wherein KjRepresents an optimal coordination scheme for calculating the number of user terminals i coordinated with the smart device j, and μ represents the lagrangian multiplier.
Preferably, said step S6, in order to calculate the minimum available transmit power of the ue i, adopts the following formula:
Figure GDA0003207729530000032
Figure GDA0003207729530000033
wherein
Figure GDA0003207729530000034
Indicating the minimum transmit power of the user, gijFor the power gain between the user terminal I and the smart device j, Ii，jRepresenting the maximum value of interference between the smart devices and Rt representing the lowest Qos requirement of the user.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the invention, based on the user cooperation and power distribution in the intelligent household communication system, the load balance constraint, the energy collection, the user quality service (QoS) requirement and the energy efficiency are comprehensively considered, the optimal cooperation number between the user terminal and the intelligent equipment and the minimum transmitting power of the user terminal are obtained, and the intelligent equipment in the communication system adjusts the number of the user terminals cooperating with the intelligent equipment; the user terminal increases the transmitting power if necessary according to the actual condition of the communication system, enhances the signal strength between the user terminal and the intelligent equipment, improves the efficiency of the multi-equipment parallel transmission opportunity, and increases the capacity of the intelligent home network.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a user terminal coordination and power distribution method in an intelligent home.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
A method for user terminal cooperation and power distribution in smart homes, as shown in FIG. 1, includes the following steps:
s1, calculating power gain between a user terminal i and an intelligent device j;
s2, calculating a signal to interference plus noise ratio between the user terminal i and the intelligent equipment j;
s3, calculating an available rate between the user terminal i and the intelligent equipment j;
S4, calculating a network utility function;
s5, calculating the optimal cooperation number between the user terminal i and the intelligent equipment j;
and S6, calculating the minimum transmitting power of the user terminal i.
In the present embodiment, step S1 is performed to calculate a parameter g representing the power gain between the user terminal i and the smart device jijThe following formula is adopted:
Figure GDA0003207729530000041
wherein
Figure GDA0003207729530000042
For the transmission antenna gain between the user terminal i and the smart device j,
Figure GDA0003207729530000043
for the acceptance antenna gain between the user terminal i and the smart device j,
Figure GDA0003207729530000045
is a wavelength, dijIs the separation distance, d, between the user terminal i and the intelligent device j0Is a reference distance, and eta is a path loss parameter (eta is equal to [2, 6 ]])。
In this embodiment, in step S2, to calculate the signal-to-interference-plus-noise ratio between the user terminal i and the smart device j, the following formula is adopted:
Figure GDA0003207729530000044
wherein the SINRijFor the signal to interference plus noise ratio, p, between the user terminal i and the smart device jijIs the transmission power between the user terminal i and the smart device j, W is defined as the system bandwidth, σ2Is additive white gaussian noise.
In this embodiment, in step S3, in order to calculate the velocity between the user terminal i and the smart device j, shannon formula is utilized:
Figure GDA0003207729530000051
wherein C isijFor the rate, K, between user terminal i and smart device j jIs the total number of user terminals, SINR, cooperating with the intelligent device jijIs the signal to interference-to-white ratio, so that each user terminal can receive 1/K of the total frequency band availablej。
In the present embodiment, step S4 passes through the rate C between the user terminal i and the smart device jijAnd calculating a network utility function by power consumption, and adopting the following formula:
Figure GDA0003207729530000052
wherein D represents the total network utility of the system, CijFor the rate between the user terminal i and the smart device j, to simplify the complexity of the constructed function, log (throughput)/power consumption is used as the network utility function; based on the characteristics of a log function, when a log (throughput)/power consumption definition cooperation rule is used, more users in the intelligent home are cooperated with the intelligent equipment; thus, load balancing and energy efficiency of the system can be achieved.
In this embodiment, in step S5, in order to calculate the optimal number of cooperations between the user terminal i and the smart device j, the following formula is adopted through lagrangian dual decomposition:
Figure GDA0003207729530000053
wherein KjRepresents an optimal coordination scheme for calculating the number of user terminals i coordinated with the smart device j, and μ represents the lagrangian multiplier.
In this embodiment, step S6 is to calculate the minimum available transmit power of the ue i, using the following formula:
Figure GDA0003207729530000054
Figure GDA0003207729530000055
Wherein
Figure GDA0003207729530000056
Indicating the minimum transmit power of the user, gijFor the power gain between the user terminal I and the smart device j, Ii，jRepresenting the maximum value of interference between the smart devices and Rt representing the lowest Qos requirement of the user. By updating the transmit power variable, the net power consumption value also changes. Thus, user coordination schemes may be affected by controlling power variables. By updating the power control formula to achieve convergence, the communication system can achieve a near-optimal load balancing state.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (1)

1. A user terminal cooperation and power distribution method in smart home is characterized by comprising the following steps:
s1, calculating power gain between a user terminal i and an intelligent device j;
s2, calculating a signal to interference plus noise ratio between the user terminal i and the intelligent equipment j;
s3, calculating an available rate between the user terminal i and the intelligent equipment j;
s4, calculating a network utility function;
s5, calculating the optimal cooperation number between the user terminal i and the intelligent equipment j;
s6, calculating the minimum transmitting power of the user terminal i;
said step S1 is intended to calculate g representing the power gain between the user terminal i and the smart device jijThe following formula is adopted:
Figure FDA0003207729520000011
wherein
Figure FDA0003207729520000012
For the transmission antenna gain between the user terminal i and the smart device j,
Figure FDA0003207729520000013
for the acceptance antenna gain between the user terminal i and the smart device j,
Figure FDA0003207729520000014
is a wavelength, dijIs the separation distance, d, between the user terminal i and the intelligent device j0Is a reference distance, and eta is a path loss parameter (eta is equal to [2,6 ]])；
In step S2, to calculate the signal-to-interference-plus-noise ratio between the user terminal i and the smart device j, the following formula is adopted:
Figure FDA0003207729520000015
wherein the SINRijFor the signal to interference plus noise ratio, p, between the user terminal i and the smart device jijIs a user terminal Transmission power between i and smart device j, W being defined as system bandwidth, σ2Is additive white gaussian noise;
in step S3, in order to calculate the rate between the user terminal i and the smart device j, a shannon formula is used:
Figure FDA0003207729520000016
wherein C isijFor the rate, K, between user terminal i and smart device jjIs the total number of user terminals, SINR, cooperating with the intelligent device jijIs the signal to interference-to-white ratio, so that each user terminal can receive 1/K of the total frequency band availablej；
The step S4 is performed according to the speed C between the user terminal i and the intelligent device jijAnd calculating a network utility function by power consumption, and adopting the following formula:
Figure FDA0003207729520000021
wherein D represents the total network utility of the system, CijTaking log (throughput)/power consumption as a network utility function for the rate between the user terminal i and the intelligent device j;
in step S5, in order to calculate the optimal number of cooperations between the user terminal i and the smart device j, the following formula is adopted through lagrangian dual decomposition:
Figure FDA0003207729520000022
wherein KjRepresenting an optimal cooperation scheme for calculating the number of user terminals i cooperating with the intelligent device j, wherein mu represents a Lagrange multiplier;
in step S6, in order to calculate the minimum available transmit power of the ue i, the following formula is adopted:
Figure FDA0003207729520000023
Figure FDA0003207729520000024
Wherein
Figure FDA0003207729520000025
Indicating the minimum transmit power of the user, gijFor the power gain between the user terminal I and the smart device j, IijRepresenting the maximum value of interference between the smart devices and Rt representing the lowest Qos requirement of the user.
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