CN109219141A - Method for transmitting signals and system in a kind of electric power terminal communication access net - Google Patents
Method for transmitting signals and system in a kind of electric power terminal communication access net Download PDFInfo
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- CN109219141A CN109219141A CN201710549947.1A CN201710549947A CN109219141A CN 109219141 A CN109219141 A CN 109219141A CN 201710549947 A CN201710549947 A CN 201710549947A CN 109219141 A CN109219141 A CN 109219141A
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- 238000004891 communication Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009826 distribution Methods 0.000 claims abstract description 41
- 238000012546 transfer Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
- 230000007774 longterm Effects 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 4
- 238000010606 normalization Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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Classifications
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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
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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- Engineering & Computer Science (AREA)
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Abstract
This application provides method for transmitting signals in a kind of electric power terminal communication access network, this method comprises: using subframe 0 and subframe 1 in the TD-LTE frame structure ascending-descending subframes distribution structure of storage to transmit when wireless base station is needed to wireless terminal transmission signal；When wireless terminal is needed to wireless base station signal, the subframe 2 in the TD-LTE frame structure ascending-descending subframes distribution structure of storage is used to transmit to subframe 9；Wherein, the TD-LTE frame structure ascending-descending subframes distribution structure of the storage is that subframe 0 is used for downlink transfer, and subframe 1 is transmitted for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.Based on same inventive concept, the application also proposes signal transmission system in a kind of electric power terminal communication access network, can add and improve uplink network handling capacity and reduce uplink network time delay, TD-LTE technology is made to be more applicable for electric power terminal communication access net.
Description
Technical field
The present invention relates to field of communication technology, in particular to method for transmitting signals in a kind of electric power terminal communication access network
And system.
Background technique
Intelligent distribution system is the hinge that contacts of electric power enterprise and power consumer, and terminal communication access net, which is used as, matches electricity consumption
The important bearer network of business covers power distribution automation, power information acquisition, electric car electric charging station, distribution transformer monitoring, intelligence
The demands business such as the area Neng Tai, distributed energy access.Construct framework rationally, reliable performance, safely controllable, moderate cost access
Concern of the net by electric power enterprise.
Data transmission between control centre and the network terminal can be realized mainly by wired and wireless telecommunication media.
Radio network technique includes: the technologies such as LTE, Mcwill, Wimax, it is contemplated that standardization level, technical maturity, industrial chain etc.
Factor, from the viewpoint of technology long term growth, using based on time-division long term evolution (Time Division Long Term,
TD-LTE) the electric power terminal communication access net of core technology will benefit from the industry development maturity of TD-LTE.LTE technology can be with
The advantages that providing big area coverage, high spectrum utilization, TD-LTE are realized by the way of uplink and downlink time division transmission
Duplex is more suitable for the case where data bandwidth in electric power terminal communication access net is small, and uplink and downlink flow can be adjusted flexibly.
TD-LTE technology in public network is mainly to design taking human as main terminal user, for taking human as main communication user
The demand of data transmission mainly comes from downlink, and therefore, the original intention of TD-LTE Technology design is divided more data frame structures
It is used in the transmission of downlink traffic.
Referring to table 1, table 1 is 3GPP standardizing body 7 kinds of available TD- specified in 36.211 standard agreement of TS
The distribution of LTE frame structure ascending-descending subframes.
Table 1
The downlink bandwidth demand of the terminal of most business is not high in electric power terminal communication access net, and uses telecommunications
The uplink service of great amount of terminals occupies the main flow of network in the business such as breath acquisition, therefore for electric power enterprise, TD-
When LTE technology is applied to electric power terminal communication access net, the network planning needs to distribute using reasonable uplink and downlink, to guarantee data
The capacity and real-time of transmission.
In order to promote the allocation proportion of uplink traffic in network, a kind of method of frame structure design is provided in existing realization,
There is defined the special frame structure M that a kind of whole subframes are used to uplink, general frame structure specified in table 1 is N.By
All subframes are used to uplink in special frame structure, and no subframe can be used for transmitting down channel.But communication system
General Downlink Control Information must be guaranteed transmit in system.Therefore, in order to guarantee downstream data channel and control channel
Special frames M and general frame N are used alternatingly normal transmission.But also to a certain extent due to the combined use of two kinds of frame structures
The complexity used is increased, and the sending cycle of down control channel also accordingly increases in general frame.
Summary of the invention
In view of this, the application provides method for transmitting signals and system in a kind of electric power terminal communication access network, it can
Add and improve uplink network handling capacity and reduce uplink network time delay, TD-LTE technology is made to be more applicable for electric power terminal communication
Access net.
In order to solve the above technical problems, the technical solution of the application is achieved in that
Method for transmitting signals in a kind of electric power terminal communication access network, this method comprises:
When wireless base station is needed to wireless terminal transmission signal, the TD-LTE frame structure ascending-descending subframes of storage is used to distribute
Subframe 0 and subframe 1 in structure are transmitted；
When wireless terminal is needed to wireless base station signal, the TD-LTE frame structure ascending-descending subframes of storage is used to distribute
Subframe 2 in structure is transmitted to subframe 9；
Wherein, the TD-LTE frame structure ascending-descending subframes distribution structure of the storage is that subframe 0 is used for downlink transfer, subframe
1 transmits for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.
Signal transmission system in a kind of electric power terminal communication access network, which includes: wireless base station and wireless terminal；
The wireless base station, when for needing to wireless terminal transmission signal, above and below the TD-LTE frame structure of storage
Subframe 0 and subframe 1 in row subframe distribution structure are transmitted；
The wireless terminal, when for needing to wireless base station signal, above and below the TD-LTE frame structure of storage
Subframe 2 in row subframe distribution structure is transmitted to subframe 9；Wherein, the TD-LTE frame structure ascending-descending subframes distribution of the storage
Structure is that subframe 0 is used for downlink transfer, and subframe 1 is transmitted for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.
As can be seen from the above technical solution, according to the service traffics characteristic distributions now netted with electricity consumption in the application, to realize
A kind of frame structure of signal transmission configuration in electric power terminal communication access net based on TD-LTE, for meeting uplink service flow
Greater than the business characteristic of downlink business flow, this frame structure is not necessarily to be used in combination with the general frame structure in public telecommunication network,
Relative to the TD-LTE frame in public telecommunication network, the frame structure that the application proposes increases ascending-descending subframes ratio, improves uplink
Network throughput and uplink network time delay is reduced, TD-LTE technology is made to be more applicable for electric power terminal communication access net.
Detailed description of the invention
Fig. 1 is transport stream signal journey schematic diagram in electric power terminal communication access network in the embodiment of the present application；
Fig. 2 be provided in the embodiment of the present application compare comparison diagram with the ascending-descending subframes of existing TD-LTE frame structure；
Fig. 3 is comparing with the normalization uplink throughput of existing TD-LTE frame structure of providing in the embodiment of the present application
Figure；
Fig. 4 is the normalization time delay comparison diagram with existing TD-LTE frame structure provided in the embodiment of the present application；
Fig. 5 is the sync interval comparison diagram with existing TD-LTE frame structure provided in the embodiment of the present application；
Fig. 6 is the system schematic for being applied to above-mentioned technology in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
Method for transmitting signals in a kind of electric power terminal communication access network is provided in the embodiment of the present application, according to existing with electricity consumption
The service traffics characteristic distributions of net, to realize that the signal transmission configuration in the electric power terminal communication access net based on TD-LTE is a kind of
Frame structure, the business characteristic for being greater than downlink business flow for meeting uplink service flow, this frame structure is not necessarily to and common electrical
General frame structure in letter net is used in combination, and relative to the TD-LTE frame in public telecommunication network, the frame structure that the application proposes adds
Big ascending-descending subframes ratios, improve uplink network handling capacity and reduce uplink network time delay, keep TD-LTE technology more suitable
For electric power terminal communication access net.
Electric power terminal communication access net is made of the wireless network based on improved TD-LTE in the embodiment of the present application.It is based on
The wireless terminal stationary distribution of TD-LTE technology is improved in each network node of electric power terminal communication access net, i.e. wireless terminal
For the network node in electric power terminal communication access net；It the position of wireless base station can be with the change in electric power terminal communication access net
Plant location is identical, can also be different.It mainly include that power business is periodically supervised between each network node and base station control center
Survey the data traffic with sudden order.
TD-LTE frame structure ascending-descending subframes distribution structure is configured in wireless base station side in advance in the embodiment of the present application, and is deposited
Storage；
TD-LTE frame structure ascending-descending subframes distribution structure can be locally configured for wireless terminal；Also it can receive base
Synchronous TD-LTE frame structure ascending-descending subframes distribution structure of standing simultaneously stores.
As long as guaranteeing that wireless terminal and wireless base station two sides are stored with same TD-LTE frame structure ascending-descending subframes distribution knot
Structure is not limited to specific implementation.
The TD-LTE frame structure ascending-descending subframes distribution structure provided in the embodiment of the present application are as follows: subframe 0 is passed for downlink
Defeated, subframe 1 is transmitted for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.
Here special subframe is with as defined in TD-LTE standard agreement, including downlink guides time slot DwPTS, downstream-to-upstream
Protection interval GP and downlink guide time slot UpPTS.
Referring to table 2, table 2 is TD-LTE frame structure ascending-descending subframes distribution structure schematic diagram in the embodiment of the present application.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U | U | U | U | U | U | U | U |
Table 2
The number of sub-frame of uplink and downlink subframe ratio is 4:1 in the frame structure schematic table provided in table 2.Compared in table 1
More available subframe is used for uplink by 7 kinds of ascending-descending subframes distribution structures of TD-LTE, this frame structure.
It is described in detail in the embodiment of the present application with reference to the accompanying drawing and realizes signal transmission in electric power terminal communication access network
Process.
It is transport stream signal journey schematic diagram in electric power terminal communication access network in the embodiment of the present application referring to Fig. 1, Fig. 1.
Specific steps are as follows:
Step 101, when wireless base station is needed to wireless terminal transmission signal, the TD-LTE frame structure uplink and downlink of storage is used
Subframe 0 and subframe 1 in subframe distribution structure are transmitted.
Step 102, when wireless terminal is needed to wireless base station signal, the TD-LTE frame structure uplink and downlink of storage is used
Subframe 2 in subframe distribution structure is transmitted to subframe 9.
Downlink transfer secondary synchronization signal in subframe 0 and subframe 5, subframe 1 are provided in 36.211 standard agreement of TS for TD-LTE
With downlink transfer primary synchronization signal in subframe 6.In this frame structure provided by the present application, when subframe 5 and subframe 6 are used for
After uplink, the subframe 5 of script and the function of the synchronization signal in subframe 6 can be by being based on orthogonal frequency division multiplexing
The mode of (Orthogonal Frequency Division Multiplexing, OFDM) symbol cyclic prefix carries out downlink biography
The transmission of defeated secondary synchronization signal and primary synchronization signal；0 downlink transfer secondary synchronization signal of subframe can also be used only；Using only subframe
1 downlink transfer primary synchronization signal.
Data channel and the format of control channel remain unchanged in frame structure in the embodiment of the present application.
Referring to fig. 2, Fig. 2 is comparing with the ascending-descending subframes of existing TD-LTE frame structure of providing in the embodiment of the present application
Than figure.
Referring to Fig. 3, Fig. 3 is handling up with the normalization uplink of existing TD-LTE frame structure of providing in the embodiment of the present application
Measure comparison diagram.
Referring to fig. 4, Fig. 4 is comparing with the normalization time delay of existing TD-LTE frame structure of providing in the embodiment of the present application
Figure.
Referring to Fig. 5, Fig. 5 is comparing with the sync interval of existing TD-LTE frame structure of providing in the embodiment of the present application
Figure.
Fig. 2 into Fig. 5, from ascending-descending subframes than, uplink throughput, delay performance and sync interval in terms of incite somebody to action this respectively
Structure that frame structure, special frames and the general frame proposed in application embodiment is used alternatingly and general frame structure these three frame knots
Different performance between structure is compared.
M of the Fig. 2 into Fig. 5 indicates the number of special frames, and N indicates that general frame (is that subframe ratio is with uplink-downlink configuration structure 0
For the general frame of 2:3) number, New represents the improvement frame structure proposed in the embodiment of the present application, and Normal indicates general
TD-LTE frame structure.
Comparison is normalized using the handling capacity of general frame structure and time delay as benchmark in Fig. 3 and Fig. 4.Unit in Fig. 5
For number of subframes.
The frame structure proposed by the application it can be seen from Fig. 2 to Fig. 5 has in ascending-descending subframes ratio, handling capacity, time delay
Have compared to general frame structure better performance.When use ratio of the special frame number M to general frame number N is smaller, Wen Zhongti
Frame structure out can have the structure better performance being used alternatingly compared to special frames and general frame.
Fig. 2 is into Fig. 4, when general frame number is 1, if special frame number is less than or equal to 2, and the frame structure that proposes in text
With compared to combined frames better performance；When general frame number is 3, if special frame number is less than or equal to 4, proposed in text
Frame structure, which has, compares combined frames better performance；When general frame number is 5, if special frame number is less than or equal to 6, Wen Zhong
The frame structure of proposition, which has, compares combined frames better performance.
Ordinate is number of subframes in Fig. 5, as seen from Figure 5, in the frame structure that the application proposes in downlink subframe
The sync interval period extends 5 subframes, but the structure (N being used alternatingly compared to special frames and general frame compared to general frame structure
For=1), with the increase of M, the sync interval period can be continuously increased, but the sync interval week of the frame structure of the application proposition
Phase can then keep a lesser fixed value.
Based on same inventive concept, the application also provides signal transmission system in a kind of electric power terminal communication access network
System.Referring to Fig. 6, Fig. 6 is the system schematic for being applied to above-mentioned technology in the embodiment of the present application.The system includes: wireless base station
601 and wireless terminal 602；
Wireless base station 601 uses the TD-LTE frame structure uplink and downlink of storage when for needing to wireless terminal transmission signal
Subframe 0 and subframe 1 in subframe distribution structure are transmitted；
Wireless terminal 602 uses the TD-LTE frame structure uplink and downlink of storage when for needing to wireless base station signal
Subframe 2 in subframe distribution structure is transmitted to subframe 9；Wherein, the TD-LTE frame structure ascending-descending subframes of the storage distribute knot
Structure is that subframe 0 is used for downlink transfer, and subframe 1 is transmitted for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.
Preferably,
Wireless base station 601, the mode based on OFDM symbol cyclic prefix that is further used for carry out the auxiliary synchronous letter of downlink transfer
Number and primary synchronization signal transmission.
Preferably,
Wireless base station 601 is further used for using 0 downlink transfer secondary synchronization signal of subframe；Use 1 downlink transfer master of subframe
Synchronization signal.
Preferably,
The TD-LTE frame structure ascending-descending subframes distribution structure of wireless base station 601, storage is locally configured；
The TD-LTE frame structure ascending-descending subframes distribution structure of wireless terminal 602, storage is locally configured, or receives
The TD-LTE frame structure ascending-descending subframes distribution structure of base station synchronization.
Preferably,
The position of wireless base station 601 is identical as the power transformation station location in electric power terminal communication access net；
Wireless terminal 602 is the network node in electric power terminal communication access net.
In conclusion the application passes through according to the service traffics characteristic distributions now netted with electricity consumption, TD-LTE is based on to realize
Electric power terminal communication access net in a kind of frame structure of signal transmission configuration, for meeting uplink service flow greater than lower industry
The business characteristic of business flow, this frame structure with the general frame structure in public telecommunication network without being used in combination, relative to public
TD-LTE frame in telecommunications network, the frame structure that the application proposes increase ascending-descending subframes ratio, improve uplink network handling capacity
With reduce uplink network time delay, so that TD-LTE technology is more applicable for electric power terminal communication access net.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (10)
1. method for transmitting signals in a kind of electric power terminal communication access network, which is characterized in that this method comprises:
When wireless base station is needed to wireless terminal transmission signal, the time-division long term evolution TD-LTE frame structure uplink and downlink of storage is used
Subframe 0 and subframe 1 in subframe distribution structure are transmitted；
When wireless terminal is needed to wireless base station signal, the TD-LTE frame structure ascending-descending subframes distribution structure of storage is used
In subframe 2 to subframe 9 transmit；
Wherein, the TD-LTE frame structure ascending-descending subframes distribution structure of the storage is that subframe 0 is used for downlink transfer, and subframe 1 is used
It is transmitted in downlink or special subframe, subframe 2 to subframe 9 is used for uplink.
2. the method according to claim 1, wherein the method further includes:
Mode based on orthogonal frequency division multiplex OFDM symbol cyclic prefix carries out downlink transfer secondary synchronization signal and primary synchronization signal
Transmission.
3. the method according to claim 1, wherein the method further includes:
Use 0 downlink transfer secondary synchronization signal of subframe；
Use 1 downlink transfer primary synchronization signal of subframe.
4. the method according to claim 1, wherein
The TD-LTE frame structure ascending-descending subframes distribution structure of the wireless base station storage is locally configured；
The TD-LTE frame structure ascending-descending subframes distribution structure of the wireless terminal storage is locally configured, or receives base station
Synchronous TD-LTE frame structure ascending-descending subframes distribution structure.
5. method according to claim 1-4, which is characterized in that
The position of the wireless base station is identical as the power transformation station location in electric power terminal communication access net, or different；
The wireless terminal is the network node in electric power terminal communication access net.
6. signal transmission system in a kind of electric power terminal communication access network, which is characterized in that the system include: wireless base station and
Wireless terminal；
The wireless base station uses the time-division long term evolution TD-LTE frame of storage when for needing to wireless terminal transmission signal
Subframe 0 and subframe 1 in structure ascending-descending subframes distribution structure are transmitted；
The wireless terminal when for needing to wireless base station signal, uses TD-LTE frame structure uplink and downlink of storage
Subframe 2 in frame distribution structure is transmitted to subframe 9；Wherein, the TD-LTE frame structure ascending-descending subframes distribution structure of the storage
It is used for downlink transfer for subframe 0, subframe 1 to be transmitted for downlink or special subframe, and subframe 2 to subframe 9 is used for uplink.
7. system according to claim 6, which is characterized in that
The wireless base station is further used for the mode based on orthogonal frequency division multiplex OFDM symbol cyclic prefix and carries out downlink transfer
The transmission of secondary synchronization signal and primary synchronization signal.
8. system according to claim 6, which is characterized in that
The wireless base station is further used for using 0 downlink transfer secondary synchronization signal of subframe；Using subframe, 1 downlink transfer master is same
Walk signal.
9. system according to claim 1, which is characterized in that
The TD-LTE frame structure ascending-descending subframes distribution structure of the wireless base station, storage is locally configured；
The TD-LTE frame structure ascending-descending subframes distribution structure of the wireless terminal, storage is locally configured, or receives base
It stands synchronous TD-LTE frame structure ascending-descending subframes distribution structure.
10. according to the described in any item systems of claim 6-9, which is characterized in that
The position of the wireless base station is identical as the power transformation station location in electric power terminal communication access net；
The wireless terminal is the network node in electric power terminal communication access net.
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Application publication date: 20190115 |