CN105827277A - Broadband power line communication cross layer dynamic spectrum allocation method - Google Patents
Broadband power line communication cross layer dynamic spectrum allocation method Download PDFInfo
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- 238000001228 spectrum Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 238000012546 transfer Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000006855 networking Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000010606 normalization Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0004—Modulated-carrier systems using wavelets
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- 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
- H04L41/08—Configuration management of networks or network elements
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- 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
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a broadband power line communication cross layer dynamic spectrum allocation method. The system according to the method comprises user nodes and available subcarriers which are arranged in a broadband power line network. All the subcarriers are allocated according to the comprehensive link indexes of each user node in the broadband power line communication network, and the node of the maximum comprehensive link indexes acquires the subcarriers. Then the comprehensive link indexes including the number of neighbor nodes, the data packet transmission requirements, data packet average waiting time and the underlying channel characteristics of each user node are considered across layers, and dynamic spectrum allocation of broadband power line communication is realized across layers based on the comprehensive link indexes so that the overall transmission efficiency of the network is enabled to be optimal. The method is reasonable in design, dynamic spectrum allocation of broadband power line communication is realized across layers based on the comprehensive link indexes by facing the common lumped type communication scene in broadband power line communication so that the requirements of practicality and high efficiency of broadband power line communication can be met.
Description
Technical field
The present invention relates to electronic information technical field, particularly to broadband power line communication field, more particularly, to a kind of broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index.
Background technology
Development and the further in-depth of power system reform along with the strong intelligent grid of China, can be widely applied to Smart Home, Intellisense and the broadband power line communication in intelligent communication field such as automatic demand response, four table collection are copied, receive industrial quarters pursue with the consistent of academia with its high-transmission efficiency, the low advantage such as cost that realize.
Complicated, changeable power line channel environment is still the key factor affecting broadband power line communication transmission quality, and therefore dynamic frequency spectrum deployment (DSM) is used widely in broadband power line communication.The dynamic frequency spectrum deployment algorithm used in existing broadband power line communication, or there is higher algorithm complex, it is achieved cost is of a relatively high；Consider the most merely channel condition, and then ignore the lifting of the network overall transfer efficiency can brought at cross-layer visual angle.
Given this, the present invention devises a kind of broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index, reasonable in design, the lump type communication scenes generally existed in broadband power line communication, based on a kind of integrated link index, realize the cross-layer dynamic frequency spectrum deployment of broadband power line communication, meet practicality and the high efficiency demand of broadband power line communication；The broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index carried, cannot be only used for broadband power line communication category, apply also for other communication networks promote the transmission performance of network, such as Wireless Personal Network, Zigbee communication etc..
Summary of the invention
The technical problem to be solved in the present invention is to overcome drawbacks described above, a kind of broadband power line communication cross-layer method for allocating dynamic frequency spectrums is provided, reasonable in design, the lump type communication scenes generally existed in broadband power line communication, based on a kind of integrated link index, realize the cross-layer dynamic frequency spectrum deployment of broadband power line communication, meet practicality and the high efficiency demand of broadband power line communication；The broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index carried, cannot be only used for broadband power line communication category, apply also for other communication networks promote the transmission performance of network, such as Wireless Personal Network, Zigbee communication etc., have good practicality and promotional value.
For solving the problems referred to above, the technical solution adopted in the present invention is:
Broadband power line communication cross-layer method for allocating dynamic frequency spectrums, it is characterized in that: including being arranged in broadband power line network has user node and available subcarrier, the most each subcarrier is allocated according to the integrated link index of each user node in broadband power line communication network, the node of integrated link index maximum obtains this subcarrier, then cross-layer considers the neighbor node quantity of each user node, packet transmission demand, the integrated link index of packet average latency and the bottom characteristic of channel, and the dynamic frequency spectrum deployment of broadband power line communication is realized based on this integrated link index cross-layer, the overall transfer efficiency making network reaches optimum.
As the technical scheme of a kind of optimization, use the neighbor node number of each nodes records in communication topology, indirectly indicate the relaying busy extent that this node is possible.
As the technical scheme of a kind of optimization, in description a period of time, the average degree of the data packet services demand of each node, is the short time average of the product of node data bag bag length and packet priority weight.
As the technical scheme of a kind of optimization, the meansigma methods of the service latency of each node data bag in a period of time, is that the time parameter of node quality-of-service describes.
As the technical scheme of a kind of optimization, if there being N number of user node in broadband power line network, available subcarrier number is K, then subcarrier k distributes to its signal to noise ratio when node n carries out data transmission and is represented by σ k, n, DSM algorithm maximized for conventional rate, its object function is:
R is transfer rate；
On the basis of taking into account cross-layer thought and algorithm implementation complexity, formulating integrated link index S is neighbor node quantity, packet transmission demand, packet average latency and the function of bottom signal-to-noise characteristic, then the object function of cross-layer DSM is:
Wherein, mnFor the neighbor node quantity of user n, being the neighbor node number of each nodes records in the communication topology of networking formation, it indicates the relaying busy extent that this node is possible indirectly；lnIdentify the packet transmission demand of nearest a period of time interior nodes n, with the node data long d of bag bagnWith data priority weighting wnThe time average of product represent:
ln=avg [dn*wn]；
Tn is the statistical value of Time Service quality, the i.e. average latency of packet in node n nearest a period of time；σ k, n are signal to noise ratio；
For making the node that busy extent is higher can obtain relatively many available subcarriers with high probability, cater to the transmission demand of packet in network simultaneously, and making the Time Service quality of network entirety and communication transmission quality be met, integrated link index can use the form of the finger scalar parameter sum of each finger scalar multiplication or Weight to realize.
Owing to have employed technique scheme, compared with prior art, the present invention is reasonable in design, the lump type communication scenes generally existed in broadband power line communication, based on a kind of integrated link index, realize the cross-layer dynamic frequency spectrum deployment of broadband power line communication, meet practicality and the high efficiency demand of broadband power line communication；The broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index carried, cannot be only used for broadband power line communication category, apply also for other communication networks promote the transmission performance of network, such as Wireless Personal Network, Zigbee communication etc., have good practicality and promotional value.
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings simultaneously.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention application scenarios example in actual broadband power line communication network.
Fig. 2 is that the cross-layer dynamic frequency spectrum deployment of inventive embodiments contrasts with conventional dynamic frequency spectrum distribution normalization transfer rate in actual broadband power line communication network.
Fig. 3 is the cross-layer dynamic frequency spectrum deployment normalization average waiting duration contrast with conventional dynamic frequency spectrum distribution packet in actual broadband power line communication network of inventive embodiments.
Detailed description of the invention
Embodiment:
A kind of broadband power line communication cross-layer method for allocating dynamic frequency spectrums, it is characterized in that: including being arranged in broadband power line network has user node and available subcarrier, the most each subcarrier is allocated according to the integrated link index of each user node in broadband power line communication network, the node of integrated link index maximum obtains this subcarrier, then cross-layer considers the neighbor node quantity of each user node, packet transmission demand, the integrated link index of packet average latency and the bottom characteristic of channel, and the dynamic frequency spectrum deployment of broadband power line communication is realized based on this integrated link index cross-layer, the overall transfer efficiency making network reaches optimum.
Use the neighbor node number of each nodes records in communication topology, indirectly indicate the relaying busy extent that this node is possible.In description a period of time, the average degree of the data packet services demand of each node, is the short time average of the product of node data bag bag length and packet priority weight.The meansigma methods of the service latency of each node data bag in a period of time, is that the time parameter of node quality-of-service describes.
The most just as a example by broadband power line communication system based on OFDM, elaborate the broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index of the present invention.
If there being N number of user node in broadband power line network, available subcarrier number is K, then subcarrier k distributes to its signal to noise ratio when node n carries out data transmission and is represented by σ k, n, DSM algorithm maximized for conventional rate, and its object function is:
R is transfer rate.
On the basis of taking into account cross-layer thought and algorithm implementation complexity, formulating integrated link index S is neighbor node quantity, packet transmission demand, packet average latency and the function of bottom signal-to-noise characteristic, then the object function of cross-layer DSM is:
Wherein, mnFor the neighbor node quantity of user n, being the neighbor node number of each nodes records in the communication topology of networking formation, it indicates the relaying busy extent that this node is possible indirectly；lnIdentify the packet transmission demand of nearest a period of time interior nodes n, with the node data long d of bag bagnWith data priority weighting wnThe time average of product represent:
ln=avg [dn*wn]；
Tn is the statistical value of Time Service quality, the i.e. average latency of packet in node n nearest a period of time；σ k, n are signal to noise ratio.
For making the node that busy extent is higher can obtain relatively many available subcarriers with high probability, cater to the transmission demand of packet in network simultaneously, and making the Time Service quality of network entirety and communication transmission quality be met, integrated link index can use the form of the finger scalar parameter sum of each finger scalar multiplication or Weight to realize.
As shown in table 1, for the false code realizing flow process of the embodiment of the present invention.Vector P is for storing the allocation result of cross-layer DSM, it may be assumed that subcarrier k distributes to user n=P (k).
Table 1 realizes the false code of flow process for the embodiment of the present invention.
As it is shown in figure 1, be embodiment of the present invention application scenarios example in actual broadband power line communication network.This embodiment realizes based on concrete broadband power line communication network topology, the channel of actual measurement and noise characteristic.Cross-layer dynamic frequency spectrum deployment (DSM) method that the present invention is carried by this embodiment, performance comparison is carried out with traditional speed maximized dynamic frequency spectrum deployment (DSM) method, analogue system realizes based on Homplug protocol parameter, enumerate major parameter: it is 256 that Fourier transformation is counted, counting of Cyclic Prefix (CP) is 172, raised cosine roll off overlap counts 8, sampling clock 50MHz, the maximum duration 5.12 μ s of effective data packets.
The broadband power line communication network that the present invention manages towards lump type, the integrated link index cross-layer formulated considers the neighbor node quantity of each user node, packet transmission demand, packet average latency and the bottom characteristic of channel, wherein, the neighbor node quantity of each user node uses the neighbor node number of each nodes records in communication topology, this parameter indicates the relaying busy extent that this node is possible indirectly, it is ensured that the node that busy extent is high obtains more available subcarrier；In packet transmission requirement description nearest a period of time, the average degree of the data packet services demand of each node, is the short time average of the product of node data bag bag length and packet priority weight；The packet average latency, the meansigma methods of the service latency of each node data bag in identifying nearest a period of time, is that the time parameter of node quality-of-service describes；The bottom characteristic of channel is then to utilize the signal to noise ratio of two-way channel between communication user node and central coordinator, portrays the communication transmission quality of bottom.
As shown in Figure 2, cross-layer dynamic frequency spectrum deployment (DSM) method for the embodiment of the present invention contrasts with tradition DSM method transmission performance in actual broadband power line communication network, and cross-layer dynamic frequency spectrum deployment (DSM) method of the embodiment of the present invention can make broadband power line network obtain high normalization transfer rate.
As shown in Figure 3, cross-layer dynamic frequency spectrum deployment (DSM) for the embodiment of the present invention contrasts with conventional dynamic frequency spectrum distribution (DSM) normalization average waiting duration of packet in actual broadband power line communication network, and the cross-layer method for allocating dynamic frequency spectrums of the embodiment of the present invention has lower packet normalization average waiting duration.
The present invention is reasonable in design, the lump type communication scenes generally existed in broadband power line communication, based on a kind of integrated link index, it is achieved the cross-layer dynamic frequency spectrum deployment of broadband power line communication, meets practicality and the high efficiency demand of broadband power line communication；The broadband power line communication cross-layer method for allocating dynamic frequency spectrums based on integrated link index carried, cannot be only used for broadband power line communication category, apply also for other communication networks promote the transmission performance of network, such as Wireless Personal Network, Zigbee communication etc., have good practicality and promotional value.
The present invention is not limited to above-mentioned preferred implementation, and anyone should learn the structure change made under the enlightenment of the present invention, every have with the present invention same or like as technical scheme, belong to protection scope of the present invention.
Claims (5)
1. broadband power line communication cross-layer method for allocating dynamic frequency spectrums, it is characterized in that: including being arranged in broadband power line network has user node and available subcarrier, the most each subcarrier is allocated according to the integrated link index of each user node in broadband power line communication network, the node of integrated link index maximum obtains this subcarrier, then cross-layer considers the neighbor node quantity of each user node, packet transmission demand, the integrated link index of packet average latency and the bottom characteristic of channel, and the dynamic frequency spectrum deployment of broadband power line communication is realized based on this integrated link index cross-layer, the overall transfer efficiency making network reaches optimum.
Broadband power line communication cross-layer method for allocating dynamic frequency spectrums the most according to claim 1, it is characterised in that: use the neighbor node number of each nodes records in communication topology, indirectly indicate the relaying busy extent that this node is possible.
Broadband power line communication cross-layer method for allocating dynamic frequency spectrums the most according to claim 1, it is characterized in that: the average degree of the data packet services demand of each node in description a period of time, is the short time average of the product of node data bag bag length and packet priority weight.
Broadband power line communication cross-layer method for allocating dynamic frequency spectrums the most according to claim 3, it is characterised in that: the meansigma methods of the service latency of each node data bag in a period of time, is that the time parameter of node quality-of-service describes.
Broadband power line communication cross-layer method for allocating dynamic frequency spectrums the most according to claim 3, it is characterized in that: set and broadband power line network has N number of user node, available subcarrier number is K, then subcarrier k distributes to its signal to noise ratio when node n carries out data transmission and is represented by σ k, n, DSM algorithm maximized for conventional rate, its object function is:
R is transfer rate；
On the basis of taking into account cross-layer thought and algorithm implementation complexity, formulating integrated link index S is neighbor node quantity, packet transmission demand, packet average latency and the function of bottom signal-to-noise characteristic, then the object function of cross-layer DSM is:
Wherein, mnFor the neighbor node quantity of user n, being the neighbor node number of each nodes records in the communication topology of networking formation, it indicates the relaying busy extent that this node is possible indirectly；lnIdentify the packet transmission demand of nearest a period of time interior nodes n, with the node data long d of bag bagnWith data priority weighting wnThe time average of product represent:
ln=avg [dn*wn]；
Tn is the statistical value of Time Service quality, the i.e. average latency of packet in node n nearest a period of time；σ k, n are signal to noise ratio；
For making the node that busy extent is higher can obtain relatively many available subcarriers with high probability, cater to the transmission demand of packet in network simultaneously, and making the Time Service quality of network entirety and communication transmission quality be met, integrated link index can use the form of the finger scalar parameter sum of each finger scalar multiplication or Weight to realize.
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Cited By (2)
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| CN106921413A (en) * | 2017-04-26 | 2017-07-04 | 哈尔滨工业大学 | Performance optimization method of low-voltage power line communication LAN based on dynamic game |
| CN110839255A (en) * | 2019-04-26 | 2020-02-25 | 南京航空航天大学 | A method for calculating the average waiting time of users in the communication service mode of forwarding data through relays |
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Application publication date: 20160803 |