CN106998311B - Reference signal transmission method and device, and base station - Google Patents
Reference signal transmission method and device, and base station Download PDFInfo
- Publication number
- CN106998311B CN106998311B CN201610048873.9A CN201610048873A CN106998311B CN 106998311 B CN106998311 B CN 106998311B CN 201610048873 A CN201610048873 A CN 201610048873A CN 106998311 B CN106998311 B CN 106998311B
- Authority
- CN
- China
- Prior art keywords
- reference signal
- ofdm symbol
- subframe
- common reference
- carrying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims description 2
- 230000006855 networking Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000013507 mapping Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 108010076504 Protein Sorting Signals Proteins 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- 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
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a reference signal transmission method, a device and a base station, wherein the method comprises the following steps: the common reference signal is carried on one Orthogonal Frequency Division Multiplexing (OFDM) symbol in a subframe for transmission, and only one OFDM symbol is used to carry the common reference signal in one subframe. Therefore, because the downlink common reference signal is only carried on one OFDM symbol in the subframe, the receiving terminal can finish receiving the downlink reference signal in the shortest time, thereby reducing the energy consumption; the technical scheme of the embodiment of the invention is suitable for three deployment scenes of NB-IOT, namely stand-alone, in-band and guard-band modes, thereby being convenient for forming a single solution and being more beneficial to the industrial scale development of the Internet of things.
Description
Technical Field
The present invention relates to a downlink reference signal transmission technology in a narrowband system, and in particular, to a reference signal transmission method and apparatus, and a base station.
Background
In the existing long Term Evolution (L TE, <tttranslation = 'L' &tttl <t/t >tong Term Evolution) system, the mapping manner of the downlink common reference signal is as shown in fig. 1, the resource block time frequency filled with oblique lines in fig. 1 is the carrying position of the downlink common reference signal, the downlink common reference signal is mapped at least on at least four Orthogonal Frequency Division Multiplexing (OFDM) symbols in one subframe, and the downlink common reference signal is also discontinuous in the frequency domain, whereas in the existing communication of the internet of Things, the downlink common reference signal carrying manner shown in fig. 1 is adopted, and since the technology of the Narrow-Band internet of Things (NB-IOT) is mainly for the application with large coverage, low cost and low power consumption, the power consumption requirement of the internet of Things is high, the battery terminal is generally required to be able to receive the common reference signal for more than 10 years, and therefore the terminal does not want to receive the common reference signal in a short time.
For a narrow-band system requiring large coverage, the narrow-band system is generally deployed in a lower frequency band, and the moving speed is lower, so that the coherence time is longer, namely, the channel is basically unchanged for a longer time, and the time domain interpolation by using a multi-symbol reference signal does not improve the channel estimation precision; in addition, the NB-IOT includes three deployment scenarios: stand-alone, in-band, guard-band, and operators in different areas have different spectrum resources, so that the deployment scenario of NB-IOT cannot be summarized. However, at present, there is no reference signal mapping method suitable for three deployment scenarios, which is not favorable for forming a single solution (single solution), and thus the industrial scale development of the internet of things is hindered.
The downlink common reference signal mapping mode of the existing L TE system is not an optimal choice for the narrowband system, and it requires that the terminal always receives the reference signal, and cannot meet the requirement of the narrowband terminal on ultra-low energy consumption.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention provide a reference signal transmission method and apparatus, and a base station.
A method of reference signal transmission, the method comprising:
and carrying the common reference signal on one orthogonal frequency division multiplexing OFDM symbol in the subframe for transmission.
In the embodiment of the present invention, the method further includes:
only one OFDM symbol is provided within one subframe to carry the common reference signal.
In the embodiment of the present invention, the method further includes:
the OFDM symbols carrying the common reference signal are located in the middle of the subframe.
In the embodiment of the present invention, the OFDM symbol carrying the common reference signal is at least one of the following symbols:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
In the embodiment of the invention, when the OFDM symbol carrying the common reference signal does not carry other signals, the common reference signal fills the whole OFDM symbol.
In the embodiment of the invention, when the common reference signal carried in the OFDM symbol collides with other signals, the other signals are carried on the corresponding time frequency resources collided on the OFDM symbol carrying the common reference signal.
In the embodiment of the present invention, the method further includes:
for different cells, randomly selecting one OFDM symbol from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal; or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
In the embodiment of the present invention, the method further includes:
and for different cells, setting the time-frequency resource sequence carrying the common reference signals on the OFDM symbols carrying the common reference signals according to the cell identification.
An apparatus for reference signal transmission, the apparatus comprising: bearing unit and transmission unit, wherein:
the bearing unit is used for bearing the common reference signal on one orthogonal frequency division multiplexing OFDM symbol in the subframe;
a transmission unit for transmitting the common reference signal using the OFDM symbol.
In this embodiment of the present invention, the carrying unit is further configured to carry the common reference signal by using only one OFDM symbol in one subframe.
In the embodiment of the invention, the OFDM symbol carrying the common reference signal is positioned in the middle of the subframe.
In the embodiment of the present invention, the OFDM symbol carrying the common reference signal is at least one of the following symbols:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
In this embodiment of the present invention, the carrying unit is further configured to fill the entire OFDM symbol with the common reference signal when no other signal is carried in the OFDM symbol carrying the common reference signal.
In the embodiment of the present invention, the carrying unit is further configured to, when the common reference signal carried in the OFDM symbol collides with another signal, carry the other signal on the time-frequency resource corresponding to the collision on the OFDM symbol carrying the common reference signal.
In this embodiment of the present invention, the bearing unit is further configured to:
for different cells, randomly selecting one OFDM symbol from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal; or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
In this embodiment of the present invention, the bearing unit is further configured to:
and for different cells, setting the time-frequency resource sequence carrying the common reference signals on the OFDM symbols carrying the common reference signals according to the cell identification.
A base station comprises the reference signal transmission device.
In the technical solution of the embodiment of the present invention, the common reference signal is carried on an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a subframe for transmission, and only one OFDM symbol is used in one subframe to carry the common reference signal. Therefore, because the downlink common reference signal is only carried on one OFDM symbol in the subframe, the receiving terminal can finish receiving the downlink reference signal in the shortest time, thereby reducing the energy consumption; the technical scheme of the embodiment of the invention is suitable for three deployment scenes of NB-IOT, namely stand-alone, in-band and guard-band modes, thereby being convenient for forming a single solution and being more beneficial to the industrial scale development of the Internet of things.
Drawings
Fig. 1 is a schematic diagram of a mapping manner of a downlink common reference signal in an L TE system;
fig. 2 is a flowchart illustrating a reference signal transmission method according to an embodiment of the invention;
FIGS. 3 a-3 c are diagrams illustrating time shifting of reference signals in different cells according to an embodiment of the present invention;
FIGS. 4 a-4 c are diagrams illustrating frequency shifts of reference signals in different cells according to embodiments of the present invention;
fig. 5 is a schematic structural diagram of a reference signal transmission apparatus according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
Fig. 2 is a schematic flow chart of a reference signal transmission method according to an embodiment of the present invention, and as shown in fig. 2, the reference signal transmission method according to the embodiment of the present invention includes the following steps:
In the embodiment of the invention, the common reference signal is a downlink common reference signal, and the downlink reference signal is received by the receiving terminal of the internet of things for channel estimation.
In the embodiment of the invention, only one OFDM symbol is arranged in one subframe to carry the common reference signal.
In the embodiment of the invention, the OFDM symbol carrying the common reference signal is positioned in the middle of the subframe. Therefore, after the receiving terminal of the Internet of things receives the downlink common reference signal, the estimated channel is more accurate.
In the embodiment of the present invention, the OFDM symbol carrying the common reference signal is at least one of the following symbols:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
In the embodiment of the invention, when the OFDM symbol carrying the common reference signal does not carry other signals, the common reference signal fills the whole OFDM symbol.
In the embodiment of the invention, when the common reference signal carried in the OFDM symbol collides with other signals, the other signals are carried on the corresponding time frequency resources collided on the OFDM symbol carrying the common reference signal.
In the embodiment of the present invention, the other signals include, but are not limited to, Control signals or Reference signals such as a Physical Downlink Control Channel (PDCCH), a Reference Signal (RS), a Physical Broadcast Channel (PBCH), a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel state Information Reference Signal (CSI-RS), and the like.
In the embodiment of the invention, for different cells, one OFDM symbol is randomly selected from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal.
The problem of adjacent cell interference is solved, and for each cell, one OFDM symbol can be randomly selected from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to bear the common reference signal.
Or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
For example, the cell ID may be modulo 3, and a corresponding OFDM symbol carrying the downlink common reference signal is selected for the cell according to the modulo result, for example, if modulo 0 is used, the downlink common reference signal is carried on the 7 th OFDM symbol of the subframe, if modulo 1 is used, the downlink common reference signal is carried on the 6 th OFDM symbol of the subframe, and if modulo 2 is used, the downlink common reference signal is carried on the 4 th OFDM symbol of the subframe. The method may also be another bearer, if the modulo is 0, the downlink common reference signal is carried on the 6 th OFDM symbol of the subframe, if the modulo is 1, the downlink common reference signal is carried on the 4 th OFDM symbol of the subframe, and if the modulo is 2, the downlink common reference signal is carried on the 7 th OFDM symbol of the subframe.
In the embodiment of the invention, for different cells, the time-frequency resource sequence for bearing the common reference signal is set on the OFDM symbol for bearing the common reference signal according to the cell identifier.
That is, for each reference signal on one OFDM symbol, the reference signals may be arranged in the frequency domain according to the identifier of each reference signal, for example, one Resource Element (RE) includes 12 subcarriers, each subcarrier carries a reference signal with a different identifier, and the different reference signals may be sorted according to the modulo result of the cell identifier and the setting number, so as to form a shift of the reference signal in the frequency domain. The setting number may be 3, 4, 5, etc. numbers.
After the downlink common reference signal is carried on the corresponding OFDM symbol on the subframe, the subframe is sent to the receiving terminal, and the receiving terminal receives the reference signal on the corresponding OFDM symbol and carries out channel estimation, thereby correctly demodulating the related data carried in the subframe.
The essence of the technical solution of the embodiments of the present invention is further clarified by specific examples below.
The embodiment of the invention provides a novel mapping scheme of a downlink common control channel suitable for three deployment modes (stand-alone, in-band and guard-band), so that a terminal side can receive downlink reference signals in as short a time as possible, and the energy consumption is reduced. The design idea is as follows:
in order to save electricity and avoid frequently sending the common reference signal in a short period, the time-frequency domain interval mapping mode shown in fig. 1 is not adopted, but the mode of mapping on one symbol is adopted;
considering that the IOT coherence time is long, the gain of the time domain interpolation channel estimation performance in one subframe (1ms) is limited, and only one symbol is reserved in each subframe to be used for sending a downlink common reference signal;
considering the optimal channel estimation performance within 1ms, the RS symbol is placed in the middle of a subframe and occupies the whole Resource Block (RB), so that the optimal channel estimation performance can be obtained;
considering that the control/reference signals such as PDCCH/RS/PBCH/PSS/SSS/CSI-RS and the like need to be avoided when coexisting with legacy L TE, when a downlink common reference signal of a narrowband system collides with the control/reference signals, the downlink common reference signal of the narrowband system needs to be knocked out, so that the downlink common reference signal needs higher frequency domain density to ensure that the robust performance is still maintained when part of REs are knocked out;
according to the above design principle, specific examples are as follows:
example one
The downlink common reference signal of the narrowband system adopts the mapping mode shown in fig. 3 a-3 c, and only one OFDM symbol is set in one subframe to carry the common reference signal; the OFDM symbols carrying the common reference signal are located as far as possible in the middle of the subframe. In this embodiment, the OFDM symbol carrying the common reference signal is at least one of the following symbols:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, and the 4 th OFDM symbol of the subframe are respectively shown in fig. 3a to fig. 3c, and in fig. 3, the time-frequency resource filled in the gray region is the downlink common reference signal.
In order to solve the problem of interference of adjacent cells, in the embodiment of the present invention, for different cells, one OFDM symbol is randomly selected from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe, and the 4 th OFDM symbol of the subframe to carry a common reference signal.
In order to solve the problem of neighboring cell interference, a cell ID mod3 may also be adopted, and time shift is introduced, as shown in fig. 3:
when cell-IDmod3 is 0, the common reference signal carrying mode shown in fig. 3a is employed.
When cell-IDmod3 is 1, the common reference signal carrying mode shown in fig. 3b is employed.
When cell-IDmod3 is 2, the common reference signal carrying mode shown in fig. 3c is employed.
Other carrying manners are also possible, if the modulus is 0, the common reference signal carrying mode shown in fig. 3b is adopted, if the modulus is 1, the common reference signal carrying mode shown in fig. 3c is adopted, and if the modulus is 2, the common reference signal carrying mode shown in fig. 3a is adopted. Or, if the modulus is 0, the common reference signal carrying mode shown in fig. 3c is adopted, if the modulus is 1, the common reference signal carrying mode shown in fig. 3a is adopted, and if the modulus is 2, the common reference signal carrying mode shown in fig. 3b is adopted.
In the embodiment of the invention, when the common reference signal carried in the OFDM symbol collides with other signals, the other signals are carried on the corresponding time frequency resources collided on the OFDM symbol carrying the common reference signal.
In the embodiment of the present invention, the other signals include, but are not limited to, Control signals or Reference signals such as a Physical Downlink Control Channel (PDCCH), a Reference Signal (RS), a Physical Broadcast Channel (PBCH), a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel state Information Reference Signal (CSI-RS), and the like.
Example two
The mapping manner of fig. 4 a-4 c is still adopted for the downlink common reference signal of the narrowband system.
In order to solve the problem of adjacent cell interference, common reference signal sequence shift is introduced, that is, the identification sequences of the carried common reference signals are different for different cells.
In the embodiment of the invention, for different cells, the time-frequency resource sequence for bearing the common reference signal is set on the OFDM symbol for bearing the common reference signal according to the cell identifier.
That is, for each reference signal on one OFDM symbol, the reference signals may be arranged in the frequency domain according to the identifier of each reference signal, for example, one Resource Element (RE) includes 12 subcarriers, each subcarrier carries a reference signal with a different identifier, and the different reference signals may be sorted according to the modulo result of the cell identifier and the setting number, so as to form a shift of the reference signal in the frequency domain. The setting number may be 3, 4, 5, etc. numbers.
For example, the sequence shift carrying the common reference signal is determined as the result of modulo 3 with the cell identity:
when cell-IDmod3 is 0, the common reference signal carrying mode shown in fig. 4a is employed.
When cell-IDmod3 is 1, the common reference signal carrying mode shown in fig. 4b is employed.
When cell-IDmod3 is 2, the common reference signal carrying mode shown in fig. 4c is employed.
Other carrying manners are also possible, if the modulus is 0, the common reference signal carrying mode shown in fig. 4b is adopted, if the modulus is 1, the common reference signal carrying mode shown in fig. 4c is adopted, and if the modulus is 2, the common reference signal carrying mode shown in fig. 4a is adopted. Or, if the modulus is 0, the common reference signal carrying mode shown in fig. 4c is adopted, if the modulus is 1, the common reference signal carrying mode shown in fig. 4a is adopted, and if the modulus is 2, the common reference signal carrying mode shown in fig. 4b is adopted. In fig. 4, the time-frequency resource filled in the gray area is the downlink common reference signal.
The number of the common reference signal sequence shifts may also be more than 3, for example, 4 or 5, and at this time, the modulo operation number of the cell identifier also needs to be updated to 4 or 5, and so on, so that the sequence shifted reference signal corresponding to each cell identifier can be determined.
In the embodiment of the invention, when the common reference signal carried in the OFDM symbol collides with other signals, the other signals are carried on the corresponding time frequency resources collided on the OFDM symbol carrying the common reference signal.
In the embodiment of the present invention, the other signals include, but are not limited to, Control signals or Reference signals such as a Physical Downlink Control Channel (PDCCH), a Reference Signal (RS), a Physical Broadcast Channel (PBCH), a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel state Information Reference Signal (CSI-RS), and the like.
Those skilled in the art will understand that the reference signal carrying manners described in the first embodiment and the second embodiment of the present invention can be used in combination. The combination mode is easy to think, and the embodiment of the invention is not further described.
Fig. 5 is a schematic structural diagram of a reference signal transmission apparatus according to an embodiment of the present invention, and as shown in fig. 5, the reference signal transmission apparatus according to the embodiment of the present invention includes: a carrying unit 50 and a transmission unit 51, wherein:
a carrying unit 50, configured to carry a common reference signal on one orthogonal frequency division multiplexing OFDM symbol in a subframe;
a transmission unit 51 for transmitting the common reference signal using OFDM symbols.
In this embodiment of the present invention, the carrying unit 50 is further configured to carry the common reference signal by using only one OFDM symbol in one subframe.
In the embodiment of the invention, the OFDM symbol carrying the common reference signal is positioned in the middle of the subframe.
In the embodiment of the present invention, the OFDM symbol carrying the common reference signal is at least one of the following symbols:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
In this embodiment of the present invention, the carrying unit 50 is further configured to fill the entire OFDM symbol with the common reference signal when no other signal is carried in the OFDM symbol carrying the common reference signal.
In this embodiment of the present invention, the carrying unit 50 is further configured to, when the common reference signal carried in the OFDM symbol collides with another signal, carry the other signal on the time-frequency resource corresponding to the collision on the OFDM symbol carrying the common reference signal.
In this embodiment of the present invention, the bearing unit 50 is further configured to:
for different cells, randomly selecting one OFDM symbol from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal; or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
In this embodiment of the present invention, the bearing unit 50 is further configured to:
and for different cells, setting the time-frequency resource sequence carrying the common reference signals on the OFDM symbols carrying the common reference signals according to the cell identification.
It should be understood by those skilled in the art that the implementation functions of each unit in the reference signal transmission apparatus shown in fig. 5 can be understood by referring to the related description of the aforementioned reference signal transmission method.
The embodiment of the invention also discloses a base station, which comprises the reference signal transmission device shown in figure 5.
The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
In the embodiments provided in the present invention, it should be understood that the disclosed method and intelligent device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (13)
1. A reference signal transmission method is applied to a narrowband Internet of things, and comprises the following steps:
carrying a common reference signal on an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a subframe for transmission;
only one OFDM symbol is arranged in one subframe to carry a common reference signal;
the OFDM symbols carrying the common reference signal are located in the middle of the subframe.
2. The reference signal transmission method according to claim 1,
the OFDM symbol carrying the common reference signal is one of the following:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
3. The reference signal transmission method according to claim 1,
when the OFDM symbol carrying the common reference signal does not carry other signals, the common reference signal fills the whole OFDM symbol.
4. The reference signal transmission method according to claim 3,
and when the common reference signal carried in the OFDM symbol collides with other signals, carrying the other signals on corresponding time-frequency resources collided on the OFDM symbol carrying the common reference signal.
5. The method for reference signal transmission according to claim 2, wherein the method further comprises:
for different cells, randomly selecting one OFDM symbol from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal; or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
6. The method for reference signal transmission according to claim 2, wherein the method further comprises:
and for different cells, setting the time-frequency resource sequence carrying the common reference signals on the OFDM symbols carrying the common reference signals according to the cell identification.
7. The utility model provides a reference signal transmission device which characterized in that is applied to the narrowband thing networking, the device includes: bearing unit and transmission unit, wherein:
the device comprises a bearing unit, a receiving unit and a processing unit, wherein the bearing unit is used for bearing a common reference signal on one Orthogonal Frequency Division Multiplexing (OFDM) symbol in a subframe, only one OFDM symbol is used for bearing the common reference signal in one subframe, and the OFDM symbol bearing the common reference signal is positioned in the middle of the subframe;
a transmission unit for transmitting the common reference signal using the OFDM symbol.
8. The reference signal transmission apparatus according to claim 7,
the OFDM symbol carrying the common reference signal is one of the following:
the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe, the 4 th OFDM symbol of the subframe.
9. The reference signal transmission apparatus according to claim 7,
the carrying unit is further configured to fill the entire OFDM symbol with the common reference signal when no other signal is carried in the OFDM symbol carrying the common reference signal.
10. The reference signal transmission apparatus according to claim 9,
the carrying unit is further configured to, when the common reference signal carried in the OFDM symbol collides with another signal, carry the other signal on the time-frequency resource corresponding to the collision on the OFDM symbol carrying the common reference signal.
11. The apparatus for reference signal transmission according to claim 8, wherein the bearer unit is further configured to:
for different cells, randomly selecting one OFDM symbol from the 7 th OFDM symbol of a subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe to carry a common reference signal; or,
and for different cells, selecting an OFDM symbol carrying the common reference signal for each cell in the 7 th OFDM symbol of the subframe, the 6 th OFDM symbol of the subframe and the 4 th OFDM symbol of the subframe according to the cell identification.
12. The apparatus for reference signal transmission according to claim 8, wherein the bearer unit is further configured to:
and for different cells, setting the time-frequency resource sequence carrying the common reference signals on the OFDM symbols carrying the common reference signals according to the cell identification.
13. A base station, characterized in that it comprises the reference signal transmission device of any one of claims 7 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048873.9A CN106998311B (en) | 2016-01-25 | 2016-01-25 | Reference signal transmission method and device, and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048873.9A CN106998311B (en) | 2016-01-25 | 2016-01-25 | Reference signal transmission method and device, and base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106998311A CN106998311A (en) | 2017-08-01 |
| CN106998311B true CN106998311B (en) | 2020-08-04 |
Family
ID=59428684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610048873.9A Active CN106998311B (en) | 2016-01-25 | 2016-01-25 | Reference signal transmission method and device, and base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106998311B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011771B (en) * | 2018-01-05 | 2020-07-10 | 中国移动通信有限公司研究院 | Information transmission method, base station and network management unit |
| CN110139247B (en) * | 2018-02-08 | 2024-04-12 | 北京三星通信技术研究有限公司 | Method and equipment for transmitting physical channel |
| CN110519792B (en) * | 2019-10-11 | 2023-03-28 | 芯翼信息科技(上海)有限公司 | Method for identifying mobile scene of terminal and related equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621492A (en) * | 2009-08-14 | 2010-01-06 | 中兴通讯股份有限公司 | Resource determining method of special demodulation data reference signal |
| CN102036301A (en) * | 2009-09-29 | 2011-04-27 | 中兴通讯股份有限公司 | Method and device for transmitting downlink demodulation reference signals of relay link and relay system |
| CN102088434A (en) * | 2009-12-04 | 2011-06-08 | 中兴通讯股份有限公司 | Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices |
| CN102223604A (en) * | 2010-04-16 | 2011-10-19 | 中兴通讯股份有限公司 | Subframe configuring method and system |
| CN105229938A (en) * | 2013-04-14 | 2016-01-06 | Lg电子株式会社 | Control the method and apparatus of monitoring sequential in a wireless communication system |
-
2016
- 2016-01-25 CN CN201610048873.9A patent/CN106998311B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621492A (en) * | 2009-08-14 | 2010-01-06 | 中兴通讯股份有限公司 | Resource determining method of special demodulation data reference signal |
| CN102036301A (en) * | 2009-09-29 | 2011-04-27 | 中兴通讯股份有限公司 | Method and device for transmitting downlink demodulation reference signals of relay link and relay system |
| CN102088434A (en) * | 2009-12-04 | 2011-06-08 | 中兴通讯股份有限公司 | Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices |
| CN102223604A (en) * | 2010-04-16 | 2011-10-19 | 中兴通讯股份有限公司 | Subframe configuring method and system |
| CN105229938A (en) * | 2013-04-14 | 2016-01-06 | Lg电子株式会社 | Control the method and apparatus of monitoring sequential in a wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106998311A (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112073167B (en) | Transmission method, receiving method, base station and user equipment of synchronous signal block | |
| EP3741073B1 (en) | Methods, infrastructure equipment and communications device | |
| CN102422663B (en) | Method and apparatus for transmitting positioning reference signal in wireless communication system | |
| CN102265680B (en) | Base station device, mobile station device, communication system, and communication method | |
| CN102356680B (en) | Method for transmitting location based service -reference signal in wireless communication system and apparatus therefor | |
| CN109565879B (en) | Carrier configuration for random access | |
| CN103686985B (en) | Method for discovering equipment and device for device-to-device communication | |
| US20170265156A1 (en) | Method and apparatus for synchronization operation in cellular internet of things networks | |
| CN108696384B (en) | Narrowband Internet of things access method and user equipment | |
| EP2893750B1 (en) | Communications device and method | |
| CN101933372B (en) | Method for performing ranging in wireless communication system supporting two wireless communication schemes | |
| CN102118868A (en) | Mapping method and system of cell resources in cooperative measurement set during multipoint cooperative transmission | |
| CN108810934B (en) | Method for transmitting and receiving common control information, base station, terminal and storage medium | |
| JP2013504922A (en) | Method and apparatus for transmitting and receiving signals in a communication system | |
| CN110546990B (en) | Indicating method, device, equipment and storage medium for rate matching | |
| EP2893751B1 (en) | Mobile communications system, network element and method | |
| CN111837353A (en) | Method and apparatus for transmitting and receiving positioning reference signal in wireless communication system | |
| CN106877984B (en) | A kind of method and apparatus in narrowband wireless transmission | |
| CN106413109B (en) | Method and device for transmitting signal by using unauthorized carrier | |
| CN108476127A (en) | Implicit derivation Frequency Synchronization is distributed according to DMRS | |
| CN114268530B (en) | Signal sending and receiving method, terminal and device | |
| CN105101429A (en) | D2D (Device-to-Device) resource allocation method, network equipment and user equipment | |
| WO2020063950A1 (en) | Method and device for processing interference, storage medium and electronic device | |
| CN106998311B (en) | Reference signal transmission method and device, and base station | |
| CN115397006A (en) | Narrowband Internet of things access method and user equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |