CN110690954A - Asymmetric hybrid duplex data transmission method and system - Google Patents
Asymmetric hybrid duplex data transmission method and system Download PDFInfo
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- CN110690954A CN110690954A CN201810731802.8A CN201810731802A CN110690954A CN 110690954 A CN110690954 A CN 110690954A CN 201810731802 A CN201810731802 A CN 201810731802A CN 110690954 A CN110690954 A CN 110690954A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001228 spectrum Methods 0.000 claims abstract description 109
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 61
- 230000006854 communication Effects 0.000 abstract description 18
- 238000004891 communication Methods 0.000 abstract description 18
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- 238000010586 diagram Methods 0.000 description 5
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- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
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- 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
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- 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
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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Abstract
The invention discloses an asymmetric hybrid duplex data transmission method and system, and belongs to the technical field of wireless communication. The method comprises the following steps: using the downlink unidirectional frequency spectrum to bear downlink service data; using a bidirectional spectrum to carry the combined data; the downlink unidirectional spectrum and the bidirectional spectrum are unpaired spectrums; the combined data includes uplink service data, uplink control data, and downlink control data. In the invention, duplex mixing is realized, and asymmetric requirements among uplink and downlink, wireless nodes and wireless terminals in wireless communication are met by asymmetry on frequency spectrum, bandwidth and duration adopted in service data transmission; meanwhile, the invention adopts the data transmission mode of asymmetric hybrid duplex, not only the engineering realization is simple, but also the transmission efficiency of the data is greatly improved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an asymmetric hybrid duplex data transmission method and system.
Background
Wireless Communication (Wireless Communication) is a Communication method that is carried out by wired Communication and exchanges information by utilizing the characteristic that an electromagnetic wave signal can propagate in a free space. I.e., information data is carried over the radio spectrum and exchanged between wireless nodes.
Currently, there are two forms of wireless communication, one is one-to-one, and one is one-to-many; one of the one-to-many is generally referred to as a wireless node or base station (hereinafter referred to as a wireless node), and the one-to-many is referred to as a terminal; in any form, signals of electromagnetic waves interfere with each other, so that a scheduling mechanism of electromagnetic waves, typically frequency division and time division, is required. Since in the one-to-many case, addressing of multiple terminals is involved, the scheduling mechanism is more complicated, and generally, control data is added in addition to traffic data to describe channel and traffic information, so as to ensure more reliable transmission of information.
In the technical field of wireless communication, a duplex communication mode is defined as a mode capable of bidirectional communication, and in a place where communication is realized on a physical bus topology, a full-duplex mode needs two connecting lines to respectively ensure that data can be transmitted in both directions. The duplex communication mode specifically includes Frequency Division duplex (FDD, Frequency Division duplex) and Time Division duplex (TDD, Time-Division duplex); frequency division duplex (fdd) uses a frequency-division bidirectional data technique to separate the transmitted and received signals, and the uplink and downlink segments are separated by a frequency offset (frequency offset); tdd refers to the technique of separating transmitted and received signals by time-division bidirectional data, and separating the uplink and downlink segments by different "time slots" (timeslots).
Further, frequency division duplexing has the following advantages: the device has higher efficiency and simpler spectrum planning, is more similar to the physical bus topology, and can be understood as forming physical uplink and downlink connection lines by different spectrums, so that the device cannot receive data transmitted by the device, and the transmitted and received data cannot influence each other. Time division duplexing has the following advantages: the corresponding bandwidth can be dynamically adjusted by reasonably allocating the used time slots, bearing the uplink data and the downlink data, and the requirement of multiple users can be met by reasonably allocating the time slots, so that the applicability is strong; however, due to the need for guard intervals and synchronization mechanisms, spectral efficiency is reduced and system complexity is increased.
With the continuous development of wireless communication technology, a duplex communication mode needs to bear more data types, and control data between a wireless node and a terminal is increased from original downlink service data from the wireless node to the terminal and uplink service data from the terminal to the wireless node; therefore, how to effectively exert the advantages of frequency division duplex and time division duplex, so as to better meet the development requirements of the current wireless communication technology, remains a matter of concern.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an asymmetric hybrid duplex data transmission method and system.
In a first aspect, the present invention provides an asymmetric hybrid duplex data transmission method, including:
using the downlink unidirectional frequency spectrum to bear downlink service data;
using a bidirectional spectrum to carry the combined data;
the downlink unidirectional spectrum and the bidirectional spectrum are unpaired spectrums; the combined data includes uplink service data, uplink control data, and downlink control data.
Optionally, the unpaired spectrum includes: one or more of the downlink unidirectional spectrum and one of the bidirectional spectrum, the downlink unidirectional spectrum having a different bandwidth than the bidirectional spectrum.
Optionally, the using the bidirectional spectrum to carry the combined data specifically includes:
and respectively bearing uplink service data, uplink control data and downlink control data in different time slots by using the bidirectional frequency spectrum.
Optionally, the using the bidirectional spectrum to respectively carry the uplink service data, the uplink control data, and the downlink control data in different time slots specifically includes:
and using the bidirectional frequency spectrum to bear uplink service data in an uplink service time slot, bear uplink control data in an uplink control time slot and bear downlink control data in a downlink control time slot.
Optionally, the method further includes:
configuring a downlink service channel in the downlink frequency spectrum, and configuring a bidirectional mixed channel in the bidirectional frequency spectrum;
correspondingly, the control data comprises: information of channels and information of traffic data.
In a second aspect, the present invention provides an asymmetric hybrid duplex data transmission system, including: a wireless node, one or more wireless terminals located within the coverage area of said wireless node;
the wireless node is used for using a downlink unidirectional frequency spectrum to carry downlink service data and using a bidirectional frequency spectrum to carry downlink control data;
and the wireless terminal is used for using the bidirectional frequency spectrum to carry uplink service data and/or uplink control data.
Optionally, the wireless node is specifically configured to use one or more downlink unidirectional frequency spectrums to carry downlink service data, and use one bidirectional frequency spectrum to carry downlink control data;
optionally, the wireless terminal is specifically configured to use the one bidirectional spectrum to carry uplink service data and/or uplink control data;
wherein the bandwidth of the downlink unidirectional spectrum is different from the bandwidth of the bidirectional spectrum.
The invention has the advantages that:
in the invention, at least one unidirectional frequency spectrum is adopted to bear downlink service data in a frequency division mode, and one bidirectional frequency spectrum is adopted to bear uplink service data, uplink control data and downlink control data in a time division mode, so that duplex mixing is realized, and asymmetric requirements among uplink and downlink, wireless nodes and wireless terminals in wireless communication are met by asymmetry on frequency spectrum, bandwidth and duration adopted in service data transmission; meanwhile, the invention adopts the data transmission mode of asymmetric hybrid duplex, not only the engineering realization is simple, but also the transmission efficiency of the data is greatly improved, the addressing requirement caused by the uncertainty of the number of the wireless terminals is met, and the convenient management of multiple terminals is realized.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic diagram of an asymmetric hybrid duplex data transmission system according to the present invention;
fig. 2 is a flow chart of an asymmetric hybrid duplex data transmission method provided by the present invention;
fig. 3 is a schematic diagram of an asymmetric hybrid duplex data transmission process according to the present invention;
fig. 4 is a schematic diagram of a transmission process of downlink service data provided by the present invention;
fig. 5 is a schematic diagram of a transmission process of uplink service data and uplink control data provided by the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, an asymmetric hybrid duplex data transmission system is provided, as shown in fig. 1, including: a wireless node, one or more wireless terminals located within a coverage area of the wireless node, wherein:
the wireless node is used for bearing downlink service data by using a downlink unidirectional frequency spectrum and bearing downlink control data by using a bidirectional frequency spectrum;
and the wireless terminal is used for bearing uplink service data and/or uplink control data by using the bidirectional frequency spectrum.
The data transmitted by the wireless node to the wireless terminal is downlink data, and the data transmitted by the wireless terminal to the wireless node is uplink data.
It should be noted that fig. 1 is only for illustration and not for limitation, i.e. the number of wireless terminals is not limited to 10.
According to an embodiment of the present invention, the wireless node is specifically configured to: one or more downlink unidirectional frequency spectrums are used for bearing downlink service data, and one bidirectional frequency spectrum is used for bearing downlink control data; the wireless terminal is specifically configured to: and carrying uplink service data and/or uplink control data by using the bidirectional frequency spectrum in which the wireless node is positioned.
According to the embodiment of the invention, the bandwidths of the downlink unidirectional spectrum and the bidirectional spectrum are different; the bandwidths of the downlink unidirectional spectrum and the bidirectional spectrum can be set according to requirements.
According to an embodiment of the present invention, there is also provided an asymmetric hybrid duplex data transmission method applicable to the asymmetric hybrid duplex data transmission system, as shown in fig. 2, including:
step 101: using the downlink unidirectional frequency spectrum to bear downlink service data;
step 102: using a bidirectional frequency spectrum to carry combined data, wherein the combined data comprises uplink service data, uplink control data and downlink control data;
the downlink unidirectional spectrum and the bidirectional spectrum are unpaired spectrums; specifically, the unpaired spectrum includes one or more downlink unidirectional spectrums and one bidirectional spectrum, and the bandwidths of the downlink unidirectional spectrums and the bidirectional spectrum are different.
It should be noted that, the execution order of step 101 and step 102 may be interchanged, and may also be executed simultaneously.
In the invention, at least one unidirectional frequency spectrum is adopted, a frequency division mode is adopted to bear downlink service data, the requirement of high flow rate of the wireless communication downlink service data is met with higher efficiency, and the number of the unidirectional frequency spectrum can be set according to the actual requirement; and one bidirectional frequency spectrum is adopted, and a time division mode is adopted to bear uplink service data and bidirectional control data, so that the requirement of the uplink service data of multiple wireless terminals is met with higher flexibility, and the requirement of the control data of multiple types and multiple wireless terminals is met. Namely, the problem of unbalanced data transmission at present is solved by a hybrid duplex data transmission mode.
According to an embodiment of the invention, the method further comprises:
configuring a downlink service channel in a downlink frequency spectrum and configuring a bidirectional mixed channel in a bidirectional frequency spectrum;
correspondingly, the control data includes: channel information, service data information, and the like; the channel information includes, but is not limited to, spectrum information, and the service data information includes, but is not limited to, a type and a processing manner of the service data.
The asymmetry advantage is embodied in the use of a plurality of unidirectional frequency spectrums, and also embodied in that each corresponding downlink service channel adopts a single channel coding and modulation technology, so that the frequency spectrum efficiency and the error correction capability can be effectively improved, and the data transmission rate can be favorably improved.
According to the embodiment of the present invention, the step 102 uses a bidirectional spectrum to carry the combined data, specifically:
and respectively bearing uplink service data, uplink control data and downlink control data in different time slots by using the bidirectional frequency spectrum.
More specifically, using the bidirectional spectrum to respectively carry the uplink service data, the uplink control data and the downlink control data at different time slots includes: and using the bidirectional frequency spectrum to bear uplink service data in an uplink service time slot, bear uplink control data in an uplink control time slot and bear downlink control data in a downlink control time slot.
In the invention, the uplink service data, the downlink control data and the uplink control data are respectively transmitted by different time slots through the bidirectional frequency spectrum and the time division technology, thereby not only meeting the addressing requirement caused by the uncertainty of the number of the terminals, but also meeting the scheduling requirement caused by different control data modes, and being beneficial to improving the addressing capability of the system.
Further, an overall schematic diagram of an asymmetric hybrid duplex data transmission process in the present invention is shown in fig. 3, where n downlink traffic channels and a bidirectional hybrid channel are configured between a wireless node and n wireless terminals, where a bandwidth of a spectrum corresponding to each channel can be set according to requirements, for example, a bandwidth of spectrum 1 is 702MHz ~ MHz, a bandwidth of spectrum 2 is 670MHz ~ 678MHz …, and a bandwidth of spectrum 0 is 750MHz ~ MHz, the wireless node uses spectrum 1 to carry downlink traffic data 1, sends the downlink traffic data 1 to the corresponding wireless terminal 1 through downlink traffic channel 1, uses spectrum 2 to carry downlink traffic data 2, sends the downlink traffic data n to the corresponding wireless terminal 2 … through downlink traffic channel 2, uses spectrum n to carry downlink traffic data, sends the downlink traffic data to the corresponding wireless terminal n through downlink traffic channel n, and carries uplink traffic data between the wireless node and each wireless terminal through spectrum 0 in an uplink traffic time slot, carries uplink control data in the uplink control time slot, carries downlink control data in the downlink control time slot, and carries uplink traffic data and bidirectional control data through the bidirectional hybrid channel.
It should be noted that each channel may correspond to one spectrum, or may correspond to a plurality of spectrums, and may be set according to needs.
Specifically, as shown in fig. 4, after processing the downlink service data from the internet by the baseband unit and the radio frequency unit of the wireless node, the wireless node sends the downlink service data to the terminal 1 ~ terminal 10 in the coverage area of the wireless node through the downlink service channel and the corresponding spectrum 1 and spectrum 2, and after processing the downlink service data by the radio frequency unit and the baseband unit of the wireless terminal, transmits the data to the application unit of the wireless terminal to complete the transmission of the downlink service data.
According to an embodiment of the invention, the method further comprises: the wireless terminal adopts a bidirectional frequency spectrum to bear uplink service data and uplink control data, and transmits the uplink service data to the outside through a bidirectional mixed channel;
specifically, the bidirectional hybrid channel matches information such as a channel and a terminal according to channel information, terminal information, uplink service data information and the like contained in the uplink control data, reasonably allocates an uplink service time slot, and completes the transmission of uplink service data to the outside by the terminal; thereby transmitting outward while avoiding and reducing collisions.
In the invention, at least one unidirectional frequency spectrum is adopted to bear downlink service data in a frequency division mode, and one bidirectional frequency spectrum is adopted to bear uplink service data, uplink control data and downlink control data in a time division mode, so that duplex mixing is realized, and asymmetric requirements among uplink and downlink, wireless nodes and wireless terminals in wireless communication are met by asymmetry on frequency spectrum, bandwidth and duration adopted in service data transmission; meanwhile, the invention adopts the data transmission mode of asymmetric hybrid duplex, not only the engineering realization is simple, but also the transmission efficiency of the data is greatly improved, the addressing requirement caused by the uncertainty of the number of the wireless terminals is met, and the convenient management of multiple terminals is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An asymmetric hybrid duplex data transmission method, comprising:
using the downlink unidirectional frequency spectrum to bear downlink service data;
using a bidirectional spectrum to carry the combined data;
the downlink unidirectional spectrum and the bidirectional spectrum are unpaired spectrums; the combined data includes uplink service data, uplink control data, and downlink control data.
2. The method of claim 1, wherein the unpaired spectrum comprises:
one or more of the downstream unidirectional spectrum, and one of the bidirectional spectrum;
the bandwidth of the downlink unidirectional spectrum is different from that of the bidirectional spectrum.
3. The method according to claim 1, wherein the using the bidirectional spectrum to carry the combined data specifically is:
and respectively bearing uplink service data, uplink control data and downlink control data in different time slots by using the bidirectional frequency spectrum.
4. The method according to claim 3, wherein the using the bidirectional spectrum respectively carries uplink service data, uplink control data, and downlink control data in different timeslots, specifically:
and using the bidirectional frequency spectrum to bear uplink service data in an uplink service time slot, bear uplink control data in an uplink control time slot and bear downlink control data in a downlink control time slot.
5. The method of claim 1, further comprising:
configuring a downlink service channel in the downlink frequency spectrum, and configuring a bidirectional mixed channel in the bidirectional frequency spectrum;
the control data includes: information of channels and information of traffic data.
6. An asymmetric hybrid duplex data transmission system, comprising: a wireless node, one or more wireless terminals located within the coverage area of said wireless node;
the wireless node is used for using a downlink unidirectional frequency spectrum to carry downlink service data and using a bidirectional frequency spectrum to carry downlink control data;
and the wireless terminal is used for using the bidirectional frequency spectrum to carry uplink service data and/or uplink control data.
7. The system of claim 6,
the wireless node is specifically configured to use one or more downlink unidirectional frequency spectrums to carry downlink service data, and use one bidirectional frequency spectrum to carry downlink control data;
the wireless terminal is specifically configured to use the one bidirectional spectrum to carry uplink service data and/or uplink control data;
wherein the bandwidth of the downlink unidirectional spectrum is different from the bandwidth of the bidirectional spectrum.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112486955A (en) * | 2020-12-04 | 2021-03-12 | 高慧军 | Data maintenance method based on big data and artificial intelligence and big data platform |
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Application publication date: 20200114 |