CN106330262A - Carrier aggregation-based power wireless communication system - Google Patents
Carrier aggregation-based power wireless communication system Download PDFInfo
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- CN106330262A CN106330262A CN201610793107.5A CN201610793107A CN106330262A CN 106330262 A CN106330262 A CN 106330262A CN 201610793107 A CN201610793107 A CN 201610793107A CN 106330262 A CN106330262 A CN 106330262A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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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
- H04B3/544—Setting up communications; Call and signalling arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
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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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Abstract
The present invention relates to a carrier aggregation-based power wireless communication system, belonging to the communication technology field of power systems. The carrier aggregation-based power wireless communication system fully uses existing power spectrum resources, and a specific power wireless communication system is constructed based on the carrier aggregation technology. The system comprises a core network device, a network management system, a base station, a terminal and other network element devices. The system relates to a flexible carrier aggregation technology with the uplink bandwidth and the downlink bandwidth flexibly allocated, an interference coordination technology, a massive user access technology and other advanced technologies, implements broadband service transmission in discrete narrowband spectrum, solves problems of low spectrum efficiency, low transmission rate, poor networking capability, poor real-time performance, low security and so on in the existing power system, and meets all actual demands of a smart distribution network communication system and a smart power grid communication system as much as possible.
Description
Technical field
The present invention relates to technical field of power system communication, be specifically related to a kind of electric power radio communication based on carrier aggregation
System.
Background technology
Intelligent grid is the new advancement that world today's power system development is changed, and our country also will build from chief creating
Newly, strong intelligent grid leading in the world is as developing goal.Intelligence adapted electricity is the important component part of intelligent grid, wherein
Communication system is then the important foundation realizing intelligent distribution network.In terms of adapted telecommunication, the wireline communication network such as optical fiber exists
Difficult wiring, diversion project amount is big, circuit is the most impaired, the problem such as irremovable；Power line carrier exist fluctuation of service, can
The problem such as poor by property, practical application effect is undesirable；And the public network radio communication that operator provides there is also lease expenses height, no
Can guarantee that the exclusivity of data channel, safety also places one's entire reliance upon service provider, it is impossible to guaranteed problem, based on this
The power distribution automation built and the development of power information acquisition system also receive serious impact.
Application content
In order to solve the above-mentioned problems in the prior art, this application provides a kind of electric power based on carrier aggregation without
Line communication system, this system includes communication terminal, base station, equipment of the core network and network management system；
Described terminal, base station and equipment of the core network are sequentially connected with, described network management system respectively with described terminal, base station and core
Heart net equipment connects.
Further, the mode of carrier aggregation between described terminal, base station, is used to carry out data transmission, including:
When carrying out data transmission, using each discrete channel as a member carrier, by multiple discontinuous distribution
Member carrier is polymerized to continuous print channel.
Further, described terminal includes communication terminal and power business terminal；
Described communication terminal is used for providing air interface, and based on described air interface connect described power business terminal and
Base station；
Described power business terminal is used for remote information collection and monitoring and scheduling.
Further, described air interface includes physical layer, data link layer and radio resource control,
Described physical layer is positioned at layer one, is used for providing physical channel resources；
Described data link layer is positioned at layer two, is used for setting up, safeguards, discharges wireless link, and transmits described radio chains
Data between road；
Described radio resource control, for setting up respective bearer network for different business and control data.
Further, the physical layer of described air interface uses the modulation technique of OFDMA, enters discrete frequency in frequency domain
Row resource and the division of user.
Further, the up channel between described terminal and base station is reserved one for sending terminal scheduling request
Control channel, if terminal needs to send data, then send dispatch request by reserved described control channel.
Further, the external interface of described equipment of the core network includes the interface between equipment of the core network and business main website,
Interface between described equipment of the core network and business main website uses standard LTE SGi interface to carry out the transmission of IP data.
Further, described equipment of the core network external interface includes the interface between described equipment of the core network and base station, institute
State the interface between equipment of the core network and base station and include chain of command interface and interface in the user plane；
Described chain of command interface is for transmitting the control signaling that RAB is set up, and chain of command interface is in application layer
Use S1 Application Protocol, use SCTP in transport layer；
Described interface in the user plane is for providing transmission path and the signaling information of user face tunnel management, and user data
Transmission, described interface in the user plane use GTP-U agreement.
Further, described electric power wireless communication system uses three layers of safe encryption system: the first safe floor is used for terminal
And signaling and the encryption and decryption of data between base station；Second safe floor is for signaling and the encryption and decryption of data between base station and core net；
3rd safe floor is for the encryption and decryption of data between terminal and equipment of the core network.
Further, described electric power wireless communication system uses interference coordination technique, and described interference coordination technique includes:
All of for each community subcarrier is divided into two groups, and one group is edge band, frequency band centered by a group；Wherein, institute
State marginal portion, edge band coverage cell, described center frequency-band coverage cell core；
According to presence of intercell interference, the edge band of community and the load of center frequency-band, adjust the edge band of community respectively
Maximum transmission power with center frequency-band.
Compared with the prior art, the having the beneficial effect that of the application
Discrete multicarrier, based on motility carrier aggregation technology, is integrated by the application, as a wider frequency
Bring use, transmit while realizing discrete frequency bands by unified Base-Band Processing, i.e. realize under discrete narrow band spectrum conditions
Broadband services is transmitted.Both meet power business demand in terms of bandwidth, improve again the utilization rate of frequency spectrum fragment.
The application can solve existing power communication system exist spectrum efficiency low, networking capability is weak, poor real, biography
Defeated speed is low, safety without ensureing, the problem such as operating capability is poor, power system capacity is little, realize joining in the way of power communication private network
The quick dependable communications of electricity system.
The application can promote the comprehensive service capability of intelligence adapted electrical network, supports power information collection, distribution certainly comprehensively
The power businesses such as dynamicization, negative control monitoring, video monitoring.
Accompanying drawing explanation
By the detailed description that non-limiting example is made made with reference to the following drawings of reading, other of the application
Feature, purpose and advantage will become more apparent upon:
The frame diagram of the electric power wireless communication system that Fig. 1 provides for the application；
Fig. 2 is the protocol stack architecture of the application base station and terminal room air interface；
The schematic diagram of the carrier aggregation technology that Fig. 3 is used by the application system；
Fig. 4 is the scheduling request resources configuration figure that in the application, mass users accesses design；
Fig. 5 is the basic principle schematic of interference coordination technique in the application；
Fig. 6 is the protocol stack structure of chain of command interface between equipment of the core network and base station in the application；
Fig. 7 is the protocol stack structure of interface in the user plane between equipment of the core network and base station in the application；
Fig. 8 is the protocol stack structure of SGi interface between equipment of the core network and power business main website in the application；
In accompanying drawing, same or analogous reference represents same or analogous parts.
Detailed description of the invention
Below in conjunction with the accompanying drawings the application is described in further detail.
In one typical configuration of the application, electric power wireless communication system based on carrier aggregation, as it is shown in figure 1, bag
Include terminal 1, base station 2, equipment of the core network 3 and network management system 4.
Terminal, base station and equipment of the core network are sequentially connected with, described network management system respectively with described terminal, base station and core net
Equipment connects.
Described terminal includes communication terminal and power business terminal；Wherein,
Described communication terminal is used for providing air interface, and based on described air interface connect described power business terminal and
Base station；
Described power business terminal is used for remote information collection and monitoring and scheduling.
Base station is for being responsible for the access procedure of wireless communication terminal, and communication terminal is carried out even by air interface and base station
Connect, wherein,
Described air interface includes physical layer, data link layer and radio resource control, wherein,
Described physical layer is positioned at layer one, is used for providing physical channel resources；
Described data link layer is positioned at layer two, is used for setting up, safeguards, discharges wireless link, and transmits described radio chains
Data between road；
Described radio resource control, for setting up respective bearer network for different service surface and chain of command data.
Further, the physical layer of described air interface uses the modulation technique of OFDMA, enters discrete frequency in frequency domain
Row resource and the division of user.
The air interface protocols framework of herein described system is as shown in Figure 2.
(1) physical layer (PHY)
Physical layer is positioned at layer one (L1), is responsible for providing physical channel resources.Physical layer uses modulation and the multiple access side of OFDM
Formula and the dual-mode of TDD, provide data transport service to high level.Physical layer is except needing to provide the data transmission of stability and high efficiency
Function, it has needed following functions:
The error detection of transmission channel also provides instruction to high level；
Rate-matched between transmission channel and the physical channel of coding；
The power of physical channel controls；
Cell searching and frequency and time synchronized；
Stochastic accessing and cell signal are measured.
(2) data link layer
Data link layer is positioned at layer two (L2), the basic function of data link layer be responsible for the foundation of wireless link, maintenance,
The transmitting of data between release and link.In the application system, data link layer includes three sublayers: media access
Key-course MAC, control sub layer of wireless link (RLC) and packet data convergence layer (PDCP).
MAC layer is firstly the need of the mapping completed from physical channel to logic channel.MAC layer also participates in the control of Stochastic accessing
System.Undertake the work such as the scheduling of up-downgoing physical resource, management HARQ process in the data transmission.MAC is passed through in the measurement of physical layer
Report.
The function of rlc layer is completed by RLC entity.RLC provides 3 kinds of transmission modes: transparent mode, Unacknowledged Mode and confirmation
Pattern.The function of RLC is mainly and data carries out packet transmission and restructuring reception, provides the function of ARQ in acknowledged mode.
The function of PDCP layer includes header-compressed, to the encryption of user face data and deciphering and to chain of command data
Integrity protection and checking.
(3) radio resource control (RRC)
RRC agreement is responsible for wireless heterogeneous networks, and its function includes: the broadcast of system information；Company between base station and UE
Connect control；Carrying is set up, is discharged and configure；Cell measurement, community selects and gravity treatment.RRC also participates in controlling data ciphering and deciphering,
The work of data integrity protection.
The mode using carrier aggregation between terminal, base station carries out data transmission, including:
When carrying out data transmission, using each discrete channel as a member carrier, by multiple discontinuous distribution
Member carrier is polymerized to continuous print channel.
During carrying out data transmission between terminal and base station use carrier aggregation, carrier aggregation signal as it is shown on figure 3,
Carrier aggregation technology refers to, for discrete available multiple broadbands or narrowband slice, multiple continuous or discrete carrier are aggregated in one
Rise, form a more wide spectrum.Both can meet in power business demand in terms of bandwidth, frequency spectrum fragment can have been improved again
Utilization rate.
In order to meet the motility of system, the application supports asymmetric carrier aggregation, i.e. downlink and up-link is gathered
The component carrier number closed can be different.The most just can be according to different user's requests and the network planning, by integrating component
Carrier wave spread spectrum bandwidth neatly, thus reach to increase the uplink/downlink message transmission rate of user, reduce propagation delay time, increase
The effect of strong Consumer's Experience.
Carrier aggregation includes following scene: adjacent carrier aggregation (Intraband Contiguous CA), frequency band in frequency band
The outer non-conterminous carrier aggregation (outband of interior non-conterminous carrier aggregation (Intraband Non-contiguous CA), frequency band
Non-contiguous CA).The scene of the application system support belong to frequency band in non-conterminous carrier aggregation.The application is used
Carrier aggregation technology in, mainly follow following principle:
(1), after polymerization carrier wave, all parameters visible to upper strata, setting and service condition are completely transparent to upper strata.To entering
The polymerization of row discrete carrier and continuous carrier polymerization will use same subsequent treatment mode.
(2) terminal with carrier aggregation capacity supports dividing of asymmetric carrier aggregation, i.e. downlink and up-link
Amount carrier number can be different.
(3) down control channel design: in Downlink Control Information, increase carrier wave indicates sets up physical down
Carrier wave and the corresponding relation of discrete available subcarrier, and notify terminal by Downlink Control Information.
(4) carrier wave combined with interference management information uses management: in heterogeneous network, the disturbed condition of different carrier
Difference, therefore carry out discrete frequency polymerization time, will organically combine with interference management, select uplink and downlink communication can carrier wave
Communicate.
The feature that adapted electricity wireless communication system business is complicated, terminal is widely distributed and density is big, determines base station institute energy
Enough terminal quantities accommodated are considerably beyond the requirement of general communication system.For this problem, the application system uses magnanimity
User accesses design, including
In up channel between described terminal and base station, reserved one for sending the control channel of terminal scheduling request,
If terminal needs to send data, then send dispatch request by reserved described control channel.
Mass users access is designed as each terminal and has reserved the up control channel dispatch request for terminal
(SR), it is ensured that each terminal has the ability of active reporting and full duplex, when terminal has data to send when, it is possible to logical
Crossing pre-assigned this and control channel transmission dispatch request, SR resource distribution is as shown in Figure 4.Take such mode, permissible
Ensureing on the premise of mass users, balance controls the relation of the resource shared by channel and scheduling delay, thus realizes end
The fast dispatch of end.
In existing system, in each community, the frequency spectrum of distribution is orthogonal sub-carrier resources.This orthogonal subcarrier
Resource distribution mode can ensure that to the differentiation of user the inter-user interference in same community reaches the least, so that can ignore,
Therefore the interference suffered by intra-cell users is essentially from neighbor cell.In order to solve this problem, the application system uses interference
Coordination technique, described interference coordination technique includes:
All of for each community subcarrier is divided into two groups, and one group is edge band, frequency band centered by a group；Wherein, institute
State marginal portion, edge band coverage cell, described center frequency-band coverage cell core；
According to presence of intercell interference, the edge band of community and the load of center frequency-band, adjust the edge band of community respectively
Maximum transmission power with center frequency-band.
Interference coordination technique is illustrated as it is shown in figure 5, all of subcarrier is divided into two groups in each community, and one group is referred to as limit
Edge frequency band, another group is referred to as center frequency-band.Often group subcarrier is respectively provided with corresponding maximum transmission power.Edge band is used for covering
Lid cell edge part, and center frequency-band may be used for center of housing estate part, the edge band of neighbor cell is mutually orthogonal.
Can reach to reduce descending interference further by arranging the maximum transmission power ratio between edge band and center frequency-band
Purpose.
All of terminal is also classified into two classes, Cell Edge User and Cell Center User by interference coordination technique.Edge is used
Family can only use edge band, and central user can use whole band resource (center frequency-band and edge band).
In the application of interference coordination technique, the change of band resource distribution and parameter is mainly by following approach:
1) adaptive frequency of edge band divides
Border band portions with static configuration, such as can arrange the resource of 1/3 for edge band, the frequency of cell edge
Rate multiplexing factor is 3.But this configuration can also be semi-static or dynamic, say, that the configuration of edge band is by adjacent
Can adjust after the coordination of community, with reply bursty traffic or throughput demand in specific cell.
2) transmitting power ratio is adjusted
In order to suppress the presence of intercell interference of Cell Edge User, then it is necessary to reduce the transmitting power of Cell Center User,
Slightly improving the transmitting power of Cell Edge User simultaneously, can significantly improve cell-edge performance, cell throughout is only simultaneously
It is slightly to decline.Cell Center User can be at adjacent several minizones or whole network with the power of Cell Edge User ratio
Middle adjustment, such as, when cell edge load weight, it is possible to reduce power ratio is to suppress the interference from intra-cell users.
3) decision rule of Cell Edge User is adjusted
It is intended to be categorized as user Cell Edge User and little by the premise of interference coordination technique suppression presence of intercell interference
District center user.The decision rule of user's classification can carry out adaptive adjustment according to the distribution of certain intra-cell traffic.Such as,
If cell edge load is than center of housing estate load weight, then can properly increase decision threshold, to reduce Cell Edge User
Number.Base station can according to the information of this community of reporting of user and adjacent cell measurement judge this community of user distance and
The how far of adjacent cell, adjudicates and distinguishes edge customer and central user with this.
Equipment of the core network is responsible for terminal authentication, IP address of terminal management, mobile management etc., is directly connected to power business master
Stand.By equipment of the core network, power business terminal can the merit such as data acquisition, video monitoring, dispatch control, emergency repair
Energy.
Equipment of the core network external interface mainly includes connecing between the interface between base station and core net and core net and main website
Mouthful.
Wherein, the interface between base station and equipment of the core network includes chain of command interface and interface in the user plane two parts.Chain of command
Interface is mainly used in transmitting RAB and sets up relevant control signaling；Interface in the user plane is mainly used in providing path and use
The signaling information of face, family tunnel management, and the transmission of user data.
Chain of command interface uses S1 Application Protocol (S1Application Protocol, S1-AP) in application layer, in transmission
Layer uses SCTP (Stream Control Transmission Protocol, SCTP), is used for transmitting access
S1-AP message between net and core net.The protocol stack of chain of command interface is as shown in Figure 6.
Interface in the user plane uses GTP-U agreement, carries out the tunnel transmission of message between base station and core net.User face disappears
Breath includes the signaling message of user data, path and the tunnel management of user face etc..The protocol stack of interface in the user plane is as shown in Figure 7.
Use standard LTE SGi interface between equipment of the core network and power business main website, be used for the transmission of IP data.
The protocol stack of SGi interface is as shown in Figure 8.
The network management system i.e. network management unit of system, mainly includes two parts content: network status monitoring and equipment are transported
Dimension.Existing electrical management information is merged by this network management system support, and can utilize various multimedia means, GIS technology,
Complete unified integrated multimedia dispatching and command system.Function specifically includes:
1. Dispatch and Command Center's (Combat Command System and video wall, GIS information show).
2. on-the-spot commanding dispatching system (vehicle-mounted emergency base station, inserting of satellite system, Vehicle mounted station, colony terminal, movement
Video monitoring etc.).
3. videophone dispatching patcher (including wired and wireless videophone).
4. monitoring system.For integrated management, including configuration management, fault management, safety management, performance management, software
The Operation and Maintenance functions such as management, Topology Management, it is possible to maximally utilise Internet resources, cut operating costs.
Electric power wireless communication system described herein, uses three layers of safe encryption system, and wherein, the first safe floor is used for
Signaling and the encryption and decryption of data between terminal and base station；Second safe floor is for signaling and data between base station and equipment of the core network
Encryption and decryption；3rd safe floor is for the encryption and decryption of data between terminal and equipment of the core network.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit herein or basic feature, it is possible to realize the application in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present application is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the application.Should not be considered as limiting involved claim by any reference in claim.This
Outward, it is clear that " including ", a word was not excluded for other unit or step, and odd number is not excluded for plural number.In device claim, statement is multiple
Unit or device can also be realized by software or hardware by a unit or device.The first, the second word such as grade is used for table
Show title, and be not offered as any specific order.
Claims (10)
1. an electric power wireless communication system based on carrier aggregation, it is characterised in that described system includes terminal, base station, core
Heart net equipment and network management system, described terminal, base station and equipment of the core network be sequentially connected with, described network management system respectively with described end
End, base station and equipment of the core network connect, and use the mode of carrier aggregation to carry out data transmission between wherein said terminal, base station.
2. electric power wireless communication system as claimed in claim 1, it is characterised in that use carrier wave between described terminal, base station
The mode of polymerization carries out data transmission, including:
When carrying out data transmission, using each discrete channel as a member carrier, by the member of multiple discontinuous distribution
Carrier wave is polymerized to continuous print channel.
3. electric power wireless communication system as claimed in claim 1, it is characterised in that described terminal includes communication terminal and electric power
Service terminal；Wherein,
Described communication terminal is used for providing air interface, and connects described power business terminal and base based on described air interface
Stand；
Described power business terminal is used for remote information collection and monitoring and scheduling.
4. electric power wireless communication system as claimed in claim 3, it is characterised in that described air interface includes physical layer, number
According to link layer and radio resource control, wherein,
Described physical layer is positioned at layer one, is used for providing physical channel resources；
Described data link layer is positioned at layer two, is used for setting up, safeguards, discharges wireless link, and transmit described wireless link it
Between data；
Described radio resource control, for setting up respective bearer network for different service surface and chain of command data.
5. electric power wireless communication system as claimed in claim 4, it is characterised in that the physical layer of described air interface uses
The modulation technique of OFDMA, carries out the division of resource and user in frequency domain to discrete frequency.
6. electric power wireless communication system as claimed in claim 1, it is characterised in that up between described terminal and base station
In channel, reserved one for sending the control channel of terminal scheduling request, if terminal needs to send data, then by reserved
Described control channel sends dispatch request.
7. electric power wireless communication system as claimed in claim 1, it is characterised in that the external interface bag of described equipment of the core network
Including the interface between equipment of the core network and power business main website, the interface between described equipment of the core network and power business main website is adopted
The transmission of IP data is carried out with standard LTE SGi interface.
8. electric power wireless communication system as claimed in claim 1, it is characterised in that described equipment of the core network external interface includes
Interface between described equipment of the core network and base station, the interface between described equipment of the core network and base station include chain of command interface and
Interface in the user plane；Wherein,
Described chain of command interface is for transmitting the control signaling that RAB is set up, and chain of command interface uses in application layer
S1 Application Protocol, uses SCTP in transport layer；
Described interface in the user plane is for providing transmission path and the signaling information of user face tunnel management, and the biography of user data
Defeated, described interface in the user plane uses GTP-U agreement.
9. electric power wireless communication system as claimed in claim 1, it is characterised in that described system uses three layers of safety to add dense body
System, wherein, the first safe floor is for signaling and the encryption and decryption of data between terminal and base station；Second safe floor is used for base station and core
Heart net equipment room signaling and the encryption and decryption of data；3rd safe floor is for the encryption and decryption of data between terminal and equipment of the core network.
10. electric power wireless communication system as claimed in claim 1, it is characterised in that described system have employed interference coordination skill
Art, described interference coordination technique includes:
All of for each community subcarrier is divided into two groups, and one group is edge band, frequency band centered by a group；Wherein, described limit
Marginal portion, edge frequency band coverage cell, described center frequency-band coverage cell core；
According to presence of intercell interference, the edge band of community and the load of center frequency-band, adjust respectively community edge band and in
The maximum transmission power of heart frequency band.
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| CN109275190A (en) * | 2017-07-17 | 2019-01-25 | 华为技术有限公司 | A kind of communication means and device |
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| CN113517911A (en) * | 2021-07-22 | 2021-10-19 | 南京信息工程大学滨江学院 | Power line communication system and communication method based on multi-carrier aggregation technology |
| CN115002909A (en) * | 2022-04-29 | 2022-09-02 | 国网智能电网研究院有限公司 | Interference coordination method and device for transmission equipment Internet of things and electronic equipment |
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