CN108989008A - Transmission method, device and the equipment of reference signal - Google Patents
Transmission method, device and the equipment of reference signal Download PDFInfo
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- CN108989008A CN108989008A CN201710435763.2A CN201710435763A CN108989008A CN 108989008 A CN108989008 A CN 108989008A CN 201710435763 A CN201710435763 A CN 201710435763A CN 108989008 A CN108989008 A CN 108989008A
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
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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
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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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
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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Abstract
The application provides the transmission method, device and equipment of a kind of reference signal, this method comprises: first network equipment is the second network equipments configuration reference signal resource, the reference signal resource includes at least one of time-domain resource, frequency domain resource, code domain resource and port information of the reference signal；The configuration information of the reference signal resource is sent to second network equipment by the first network equipment；The first network equipment sends the reference signal to second network equipment using the reference signal resource, since first network equipment can be the resources such as time-domain resource, frequency domain resource, code domain resource and the port information that the second network equipments configuration sends reference signal according to specific channel measurement demand in real time, different channels measurement demand adaptively can be met, and, configuration method is expansible, and flexibility is good.
Description
Technical field
This application involves the communication technology more particularly to a kind of transmission methods of reference signal, device and equipment.
Background technique
In a communications system, channel measurement is carried out usually using reference signal, the effect of different types of reference signal is not
Together.Wherein, a kind of reference signal for measure channel state information is referred to as channel state information reference signals (Channel
State Information Reference Signal, CSI-RS).In a communications system, user is existing to UE to big antenna
The demand that accurate channel state information (Channel State Information, CSI) under port number measures, also has
Fast beam is scanned to carry out the demand etc. of significant wave beam tube reason.
When UE needs measure the CSI under big antenna port number, it is ensured that the transmitting of the CSI-RS of each port
Power, then the CSI-RS of a port can be sent by one group of resource unit (Resource Element, RE) to increase
Transmission power, also, the CSI-RS of different ports can by code division multiplexing (Code Division Multiplexing,
CDM mode) is multiplexed on one group of identical RE.For example, R12 supports that CDM2, i.e., the CSI-RS of two ports are 2 by length
Orthogonal code be multiplexed on 2 RE, R13 supports CDM4, i.e., the orthogonal code that the CSI-RS of 4 ports is 4 by length is multiplexed 4
On a RE.Fig. 1 is that the CSI-RS of 16 ports uses the transmission schematic diagram of CDM2, and Fig. 2 is the CSI-RS of 12 ports using CDM2's
Schematic diagram is transmitted, as depicted in figs. 1 and 2, the port numbering of the CSI-RS of 16 ports is 0-15, the port of the CSI-RS of 12 ports
Number is 0-11, wherein is transmitted on two RE that subcarrier is identical, symbol is adjacent by the way of CDM2 every two port
CSI-RS, for example, the RE in Fig. 1 and Fig. 2 gather { 0,1 }, { 2,3 }, { 4,5 }, { 6,7 }, { 8,9 }, { 10,11 }, { 12,13 },
{ 14,15 } it is respectively used to every two port and carries out CSI-RS transmission.Fig. 3 is that the CSI-RS of 16 ports is illustrated using the transmission of CDM4
Figure, Fig. 4 are that the CSI-RS of 12 ports uses the transmission schematic diagram of CDM4, wherein are transmitted by the way of CDM4 every four ports
CSI-RS, as shown in Figure 3 and Figure 4, the set of female identical 4 RE of identifier word are passed by the way of CDM4 for every 4 ports
Defeated CSI-RS.
When UE needs fast beam to scan, transmits the resource unit of CSI-RS then and should be located at as far as possible and is less orthogonal
In frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol, such as transmit each
The resource unit restriction of CSI-RS is mapped in an OFDM symbol, by sending duplicate more parts on continuous multiple symbols
CSI-RS can realize UE in the fast beam scanning and detection of receiving side.
But in the prior art, base station is that the resource distribution of the CSI-RS of each UE distribution is fixed, i.e., for passing
The symbolic number of the resource unit of defeated CSI-RS, character position are fixed, and therefore, are surveyed for the different demands of user, such as CSI
Amount demand, fast beam scanning demand etc., UE can not be according to the different need of realization of the resource-adaptive for the CSI-RS that base station is distributed
It asks.
Summary of the invention
The application provides the transmission method, device and equipment of a kind of reference signal, and for solving, UE can not in the prior art
The problem of according to the different demands of the adaptive realization user of the resource distribution of the CSI-RS of base station distribution.
The application first aspect provides a kind of transmission method of reference signal, which comprises
First network equipment is the second network equipments configuration reference signal resource, and the reference signal resource includes the ginseng
Examine at least one of time-domain resource, frequency domain resource, code domain resource and the port information of signal；
The configuration information of the reference signal resource is sent to second network equipment by the first network equipment；
The first network equipment is sent using the reference signal resource to second network equipment described with reference to letter
Number.
In the above scheme, since first network equipment can be the second net according to specific channel measurement demand in real time
Network device configuration sends the resources such as time-domain resource, frequency domain resource, code domain resource and the port information of reference signal, can be adaptive
Meet different channels measurement demand, moreover, configuration method is expansible, flexibility is good.
Optionally, if the reference signal resource includes time-domain resource, the time-domain resource includes sending the reference
At least one of time quantum number and time quantum location information of signal.
Optionally, if the reference signal resource includes time-domain resource and frequency domain resource, when the reference letter of configuration
Number time quantum number when being greater than or equal to 2, at least exist port P the first reference signal resource and port P
Second reference signal resource, first reference signal resource are identical as there are at least one in second reference signal resource
Running time-frequency resource unit；Wherein, P is the positive integer more than or equal to 2.
Optionally, at least one is identical described for first reference signal resource and second reference signal resource
Orthogonal intersection mapping on running time-frequency resource unit is identical.
In the above scheme, first network equipment is that second network equipment dynamically distributes time domain according to channel measurement demand
Resource and frequency domain resource can satisfy the different channels measurement demand of user, moreover, may exist in different reference signal resources
The configuration of overlapping running time-frequency resource unit, overlapping running time-frequency resource unit is identical so that different users can be used it is identical
Running time-frequency resource unit improves the utilization rate of running time-frequency resource.
Optionally, if the reference signal resource includes code domain resource, the code domain resource includes the reference signal pair
At least one of length and mapping pattern of the orthogonal intersection answered.
Optionally, the code domain resource further include: every S time quantum of the reference signal in T time quantum
On code domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if the reference signal resource includes the port information, the port information is the reference signal
Port information on T time quantum, and the port information includes port of the reference signal on T time quantum
Port density, port mapping and port interval of several, the described reference signal on every S time quantum in T time quantum
At least one of；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
In the above scheme, first network equipment can also be the second network equipment dynamic configuration code domain resource and/or end
Message breath can be user's assigned references signal resource from different resource views so that reference signal resource scalability become it is strong,
Flexibly and easily.
Optionally, the configuration information of the reference signal resource is sent to second network by the first network equipment
Equipment, comprising:
The first network equipment is provided the reference signal by least one of high-level signaling and physical layer signaling
The configuration information in source is sent to second network equipment.
In the above scheme, first network equipment will be with reference to letter by least one of high-level signaling and physical layer signaling
The configuration information of number resource is sent to second network equipment, avoids and individually sends the configuration information of reference signal resource and occupy and pass
The case where defeated resource, saves transfer resource, to improve utilization ratio of transmission resources.
The application second aspect provides a kind of transmission method of reference signal, which comprises
Second network equipment receives the configuration information for the reference signal resource that first network equipment is sent；The reference signal
Resource includes at least one of time-domain resource, frequency domain resource, code domain resource and port information of the reference signal；
Second network equipment receives the ginseng that the first network equipment is sent according to the reference signal resource
Examine signal.
In the above scheme, since the reference signal resource for sending reference signal is that first network equipment can be according to specific
Channel measurement demand be in real time the second network equipments configuration, including send the time-domain resource of reference signal, frequency domain resource,
The resources such as code domain resource and port information adaptively can meet different channels measurement demand, moreover, configuration method can expand
Exhibition, flexibility are good.
Optionally, if the reference signal resource includes time-domain resource, the time-domain resource includes sending the reference
At least one of time quantum number and time quantum location information of signal.
Optionally, if the reference signal resource includes time-domain resource and frequency domain resource, when the reference letter of configuration
Number time quantum number when being greater than or equal to 2, at least exist port P the first reference signal resource and port P
Second reference signal resource, first reference signal resource are identical as there are at least one in second reference signal resource
Running time-frequency resource unit；Wherein, P is the positive integer more than or equal to 2.
Optionally, at least one is identical described for first reference signal resource and second reference signal resource
Orthogonal intersection mapping on running time-frequency resource unit is identical.
In the above scheme, first network equipment is that second network equipment dynamically distributes time domain according to channel measurement demand
Resource and frequency domain resource can satisfy the different channels measurement demand of user, moreover, may exist in different reference signal resources
The configuration of overlapping running time-frequency resource unit, overlapping running time-frequency resource unit is identical so that different users can be used it is identical
Running time-frequency resource unit improves the utilization rate of running time-frequency resource.
Optionally, if the reference signal resource includes code domain resource, the code domain resource includes the reference signal pair
At least one of length and mapping pattern of the orthogonal intersection answered.
Optionally, the code domain resource further include: every S time quantum of the reference signal in T time quantum
On code domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if the reference signal resource includes the port information, the port information is the reference signal
Port information on T time quantum, and the port information includes port of the reference signal on T time quantum
Port density, port mapping and port interval of several, the described reference signal on every S time quantum in T time quantum
At least one of；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
In the above scheme, first network equipment can also be the second network equipment dynamic configuration code domain resource and/or end
Message breath can be user's assigned references signal resource from different resource views so that reference signal resource scalability become it is strong,
Flexibly and easily.
The application third aspect provides a kind of transmitting device of reference signal, and described device is the first network equipment, described
Device includes:
Configuration module, for being the second network equipments configuration reference signal resource, the reference signal resource includes described
At least one of time-domain resource, frequency domain resource, code domain resource and port information of reference signal；
First sending module, for the configuration information of the reference signal resource to be sent to second network equipment；
Second sending module, it is described with reference to letter for being sent using the reference signal resource to second network equipment
Number.
Optionally, if the reference signal resource includes time-domain resource, the time-domain resource includes sending the reference
At least one of time quantum number and time quantum location information of signal.
Optionally, if the reference signal resource includes time-domain resource and frequency domain resource, when the reference letter of configuration
Number time quantum number when being greater than or equal to 2, at least exist port P the first reference signal resource and port P
Second reference signal resource, first reference signal resource are identical as there are at least one in second reference signal resource
Running time-frequency resource unit；Wherein, P is the positive integer more than or equal to 2.
Optionally, at least one is identical described for first reference signal resource and second reference signal resource
Orthogonal intersection mapping on running time-frequency resource unit is identical.
Optionally, if the reference signal resource includes code domain resource, the code domain resource includes the reference signal pair
At least one of length and mapping pattern of the orthogonal intersection answered.
Optionally, the code domain resource further include: every S time quantum of the reference signal in T time quantum
On code domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if the reference signal resource includes the port information, the port information is the reference signal
Port information on T time quantum, and the port information includes port of the reference signal on T time quantum
Port density, port mapping and port interval of several, the described reference signal on every S time quantum in T time quantum
At least one of；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, first sending module will specifically for passing through at least one of high-level signaling and physical layer signaling
The configuration information of the reference signal resource is sent to second network equipment.
What the implementation and beneficial effect and first aspect of the transmitting device for the reference signal that above scheme provides provided
The implementation of the transmission method of reference signal is similar with beneficial effect, and details are not described herein again.
The application fourth aspect provides a kind of transmitting device of reference signal, and described device is second network equipment, described
Device includes:
First receiving module, the configuration information of the reference signal resource for receiving the transmission of first network equipment；The ginseng
Examine at least one of time-domain resource, frequency domain resource, code domain resource and the port information that signal resource includes the reference signal；
Second receiving module, for receiving the ginseng that the first network equipment is sent according to the reference signal resource
Examine signal.
Optionally, if the reference signal resource includes time-domain resource, the time-domain resource includes sending the reference
At least one of time quantum number and time quantum location information of signal.
Optionally, if the reference signal resource includes time-domain resource and frequency domain resource, when the reference letter of configuration
Number time quantum number when being greater than or equal to 2, at least exist port P the first reference signal resource and port P
Second reference signal resource, first reference signal resource are identical as there are at least one in second reference signal resource
Running time-frequency resource unit；Wherein, P is the positive integer more than or equal to 2.
Optionally, at least one is identical described for first reference signal resource and second reference signal resource
Orthogonal intersection mapping on running time-frequency resource unit is identical.
Optionally, if the reference signal resource includes code domain resource, the code domain resource includes the reference signal pair
At least one of length and mapping pattern of the orthogonal intersection answered.
Optionally, the code domain resource further include: every S time quantum of the reference signal in T time quantum
On code domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if the reference signal resource includes the port information, the port information is the reference signal
Port information on T time quantum, and the port information includes port of the reference signal on T time quantum
Port density, port mapping and port interval of several, the described reference signal on every S time quantum in T time quantum
At least one of；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
What the implementation and beneficial effect and second aspect of the transmitting device for the reference signal that above scheme provides provided
The implementation of the transmission method of reference signal is similar with beneficial effect, and details are not described herein again.
Detailed description of the invention
Fig. 1 is that the CSI-RS of 16 ports uses the transmission schematic diagram of CDM2；
Fig. 2 is that the CSI-RS of 12 ports uses the transmission schematic diagram of CDM2；
Fig. 3 is that the CSI-RS of 16 ports uses the transmission schematic diagram of CDM4；
Fig. 4 is that the CSI-RS of 12 ports uses the transmission schematic diagram of CDM4；
Fig. 5 is the application scenarios schematic diagram of the transmission method of reference information provided by the present application；
Fig. 6 is the transmission method flow chart for the reference signal that one embodiment of the application provides；
Fig. 7 a is the CDM type schematic diagram that one embodiment of the application provides；
Fig. 7 b is the CDM type schematic diagram that another embodiment of the application provides；
Fig. 7 c is the CDM type schematic diagram that the application another embodiment provides；
Fig. 8 is the transmission method flow chart for the reference signal that another embodiment of the application provides；
Fig. 9 is the transmitting device block diagram for the reference signal that one embodiment of the application provides；
Figure 10 is the transmitting device block diagram for the reference signal that another embodiment of the application provides；
Figure 11 is the transmission device block diagram for the reference signal that one embodiment of the application provides；
Figure 12 is the transmission device block diagram for the reference signal that another embodiment of the application provides.
Specific embodiment
The transmission method of reference signal provided by the present application is suitable for wireless communication system, such as long term evolution (Long Term
Evolution, LTE) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA)
System etc..Fig. 5 is the application scenarios schematic diagram of the transmission method of reference signal provided by the present application, as shown in figure 5, the scene packet
Include base station and user equipment (User Equipment, UE), wherein UE can be the equipment such as computer, mobile phone, tablet computer.Base
Standing and sending data to UE is downlink transfer, and it is uplink that UE, which sends data to base station,.
Fig. 6 is the transmission method flow chart for the reference signal that one embodiment of the application provides.What is involved is for the embodiment
The configuration information of reference signal resource is sent to second network equipment, and passed through by one network equipments configuration reference signal resource
The reference signal resource of configuration sends the process of reference signal to second network equipment, as shown in fig. 6, this method comprises:
Step 101, first network equipment are the second network equipments configuration reference signal resource, which includes
At least one of time-domain resource, frequency domain resource, code domain resource and port information of reference signal.
In the present embodiment, first network equipment can be base station, and second network equipment can be UE.In communication system
In, when needing to measure using reference signal, base station is UE configuration reference signal according to specific measurement demand in real time
Resource, for example, when UE needs to carry out CSI measurement based on reference signal, optionally, for carrying out the reference signal of CSI measurement
Port number at least more than be equal to 2.
Usually using different types of reference signal in communication system.A kind of reference signal is used for channel quality measurement, such as
Wireless resource management (Radio Resource Management, RRM) measurement of correlation, so as to realize user channel quality
Measurement and cell selection, switching, such reference signal is specifically such as cell specific reference signal (Cell-specific
Reference Signal, CRS).
Another kind of reference information is used for the measurement of channel state information, to realize the scheduling to terminal device.It is specific and
Speech, terminal device can be based on to channel state information reference signals (Channel State Information Reference
Signal, CSI-RS) channel quality measurement obtain channel state information (Channel State Information, CSI).
The reference signal for CSI measurement can be CSI-S.
For the transmission power of the CSI-RS of each port of guarantee, base station can configure the time-domain resource of 4 symbols for UE, that is, pass
The resource unit mapping of defeated each port CSI-RS is in 4 OFDM symbols；Alternatively, being passed when UE needs fast beam to scan
The resource unit restriction of defeated each port CSI-RS is mapped in an OFDM symbol.
Optionally, if reference signal resource includes time-domain resource, time-domain resource includes the time list for sending reference signal
At least one of first number and time quantum location information.Wherein, time quantum may include one or more OFDM symbols.Example
Such as, time-domain resource may include 2 time quantums, and each time quantum includes 2 OFDM symbols, the position of first time quantum
It sets and is encoded to 0,1, second the position encoded of time quantum is 2,3.Optionally, each time quantum can also only include 1
OFDM symbol.In addition, time quantum also may include one or more time slots.Time quantum can be in another embodiment
Including one or more subframes, it is not specifically limited here.
Further, if reference signal resource includes time-domain resource and frequency domain resource, when the reference signal of configuration when
Between unit number when being greater than or equal to 2, at least there is the first reference signal resource of port P and the second ginseng of a port P
Signal resource is examined, there are at least one identical running time-frequency resource lists with the second reference signal resource for the first reference signal resource
Member；Wherein, P is the positive integer more than or equal to 2.That is, at least there are two ends P in the time quantum of the reference signal of configuration
Running time-frequency resource in the reference signal resource configuration of mouth overlaps, i.e., the reference signal resource configuration of two ports P
In some running time-frequency resource unit be identical.Optionally, however not excluded that have in the reference signal resource configuration for having the T port P
Portion of time frequency resources unit be it is identical, T is positive integer greater than 2 here.
In the present embodiment, time-domain resource is to send the OFDM symbol of reference signal, and frequency domain resource is to send reference signal
Subcarrier, running time-frequency resource unit is the resource unit being made of time-domain OFDM symbol and subcarrier, as shown in Figs 1-4, one
Time-domain OFDM symbol and a subcarrier constitute a resource unit, and the running time-frequency resource unit of a reference signal may include one
A or multiple such resource units.If the time quantum number for sending reference signal is greater than or equal to 2, at least there is a base station
For the second reference signal resource of the port P that the first reference signal resource of the port P of UE configuration and a base station are UE configuration
Between there is overlapping running time-frequency resource unit, for example, time quantum number is 4, P=2, base station is the first ginseng of 2 ports of UE configuration
The running time-frequency resource cell encoding for examining signal resource is 0,1, and the running time-frequency resource cell encoding of the second reference signal resource is 1,2, then
The running time-frequency resource unit that first reference signal resource and the second reference signal resource share is 1.
Still further, the first reference signal resource is with the second reference signal resource at least one identical running time-frequency resource
Orthogonal intersection mapping on unit is identical.
Wherein, orthogonal intersection mapping includes CDM dimension and CDM type, and CDM dimension is the corresponding orthogonal intersection of CDM
Length, CDM type indicate orthogonal intersection mapping mode, the first reference signal resource and the second reference signal resource are upper
The CDM dimension and CDM type for stating the orthogonal intersection on identical running time-frequency resource unit are all identical.Fig. 7 a, Fig. 7 b, Fig. 7 c
Other CDM types can also be arranged in respectively 3 kinds of CDM types according to demand.Wherein, four running time-frequency resource lists in Fig. 7 a
Member occupies a time quantum, may be defined as CDM Class1；Four running time-frequency resource units in Fig. 7 b occupy two time quantums,
It may be defined as CDM type 2；Four running time-frequency resource units of Fig. 7 c occupy four time quantums, may be defined as CDM type 3.When for
Raising sweep speed needs using single time quantum come when sending reference signal, can be considered as CDM Class1, when
When needing to send reference signal using multiple time quantums to increase transmission power, it may be considered that use CDM type 2 or CDM
Type 3.
Optionally, in the present embodiment, base station can be that (N is by the N that occupies of reference signal resource of UE configuration according to base station
More than or equal to 1 integer) minimum particle size of time quantum is shared to determine CDM dimension and CDM class present in a time quantum
Type.For example, when the reference signal resource of base station configuration occupies 4 time quantums, when time quantum shared in 4 time quantums
Minimum particle size be 1 when, CDM Class1 as shown in Figure 7a is used uniformly on this 4 time quantums, when shared time quantum
Minimum particle size be 2 when, be used uniformly CDM type 2 as shown in Figure 7b on this 4 time quantums.
Optionally, in the present embodiment, the N (N that base station can also be occupied according to base station for the reference signal resource of UE configuration
For the integer more than or equal to 1) the user sharing situation of each time quantum in a time quantum, it determines in N number of time quantum
The orthogonal intersection of each time quantum maps, for example, the reference signal resource of base station configuration occupies 4 time quantums, first
A time quantum and second time quantum are shared by other users, then on first time quantum and second time quantum
It is all made of CDM Class1 as shown in Figure 7a, and in the third time quantum that do not shared by other users and the 4th time
CDM type 2 as shown in Figure 7b is configured on unit.
Optionally, if reference signal resource includes code domain resource, code domain resource includes the corresponding orthogonal spectrum expansion of reference signal
At least one of length and mapping pattern of code.
In the present embodiment, for mapping pattern for indicating CDM dimension and CDM type, base station can be a reference signal
One configured in multiple candidate mappings patterns is used as practical mapping pattern.For example, base station configures reference signal in 4 time lists
When practical mapping pattern in member, candidate mapping pattern may include: 1+1+2,2+2,2+1+1,1+1+1+1,1+2+1,
In, 1+1+2 is represented using CDM Class1 on first time quantum and second time quantum, and in third time list
CDM type 2 is used on member and the 4th time quantum；1+2+1 is represented in first time quantum and the 4th time quantum
It is upper to use CDM Class1, and CDM type 2 is used on second time quantum and third time quantum, and so on.Base station
It can determine reference signal resource on each time quantum by the situation that other users are shared with specific reference to each time quantum
Mapping pattern.
Optionally, base station can be notified the candidate mappings pattern by least one of high-level signaling and physical layer signaling
To user equipment.
Further, in the present embodiment, code domain resource further include: when every S in T time quantum of reference signal
Between code domain resource on unit；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
In the present embodiment, code domain resource includes the code domain resource on one or more time quantums.For example, T=12, S
=4, base station is including 12 time quantums in the reference signal resource of reference signal configuration, and every 4 time quantums are multiplexed with one
Group transfer resource is used for transmission reference signal, then code domain resource includes the code domain resource on every 4 time quantums.Alternatively, for example,
T=4, S=2, base station are in the reference signal resource of reference signal configuration including 4 time quantums, every 2 time quantums multiplexing
Be used for transmission reference signal for one group of transfer resource, then code domain resource include code domain resource on every 2 time quantums alternatively,
For example, T=4, S=1, base station is in the reference signal resource of reference signal configuration including 4 time quantums, every 1 time list
Member is that one group of transfer resource is used for transmission reference signal, then code domain resource includes the code domain resource on every 1 time quantum.
Optionally, if reference signal resource includes port information, port information is reference signal on T time quantum
Port information, and port information includes port number of the reference signal on T time quantum, reference signal in T time quantum
In every S time quantum at least one of port density, port mapping and port interval；Wherein, S be more than or equal to
1 is less than or equal to the positive integer of T.
In the present embodiment, port information includes all port informations of the reference signal on T time quantum,
In, reference signal indicates send reference using how many a ports on T time quantum in the port number on T time quantum
Signal, port density can reduce for 1RE/RB/port, (1/2) RE/RB/port etc., lesser port density with reference to letter
Number expense.Port mapping includes the preferential port assignment mode of frequency domain and the preferential port assignment mode of time domain, and frequency domain is preferential
Port assignment mode first mapped in frequency domain when refer to port mapping, then when domain mapping, the preferential port of time domain
When the method for salary distribution refers to port mapping first when domain mapping, then mapped in frequency domain, for example, reference of base station configuration is believed
Number resource occupies 4 time quantums, according to the preferential port assignment mode of frequency domain, then by N number of reference signal Port Priority point
In the frequency domain resource for fitting over 1 time quantum, then reallocate on multiple time quantums.According to the preferential port of time domain point
With mode, then then the distribution of N number of reference signal Port Priority is reallocated on 4 time quantums the more of 1 time quantum
In a frequency domain resource.
The resource unit number being divided between port between two adjacent ports of transmission of reference signals, for example, if adjacent two
There are 2 resource units between a port, be then divided into 2 between port, if there are 4 resource units between two adjacent ports, between port
It is divided into 4.Large port interval is suitable for the demand of fast beam scanning, and miniature antenna interval is suitable for accurate channel quality measurement
Demand, for example, UE1 exists shared with other UE on the 1st time quantum in 4 time quantums, and other UE have fastly
The demand of fast scanning beam, then base station configuration UE 1 is divided into large port interval between the port on the 1st time quantum.
The configuration information of reference signal resource is sent to second network equipment by step 102, first network equipment.
In the present embodiment, the configuration information of reference signal resource may include time-domain resource information, frequency domain resource information,
At least one of code domain resource information and port information information, time-domain resource information include the number of time quantum, position letter
The number of OFDM symbol etc. that breath, each time quantum include, frequency domain resource information may include subcarrier number, subcarrier
Coding etc., code domain resource information include length and mapping pattern type of orthogonal intersection etc., and port information includes port number, end
The information such as mouth density, port mapping and port interval.
Optionally, the configuration information of reference signal resource is sent to second network equipment by first network equipment, comprising: the
The configuration information of reference signal resource is sent to by one network equipment by least one of high-level signaling and physical layer signaling
Second network equipment.
In the present embodiment, first network equipment the configuration information of reference signal resource can be added to high-level signaling or
Second network equipment is sent in physical layer signaling, for example, base station passes through Downlink Control Information (Downlink Control
Information, DCI) configuration information of reference signal resource is sent to UE.
Step 103, first network equipment send reference signal to second network equipment using reference signal resource.
In the present embodiment, first network equipment is sent to second network equipment using the reference signal resource of configuration and is referred to
Signal, so that second network equipment carries out channel measurement using the reference signal.
The transmission method of reference signal provided by the embodiments of the present application, first network equipment are the second network equipments configuration ginseng
Signal resource is examined, the configuration information of reference signal resource is sent to second network equipment, and using reference signal resource to the
Two network equipments send reference signal, and first network equipment can be the second network according to specific channel measurement demand in real time
Device configuration sends the resources such as time-domain resource, frequency domain resource, code domain resource and the port information of reference signal, can be adaptive
Meet different channels measurement demand, moreover, configuration method is expansible, flexibility is good.
Fig. 8 is the transmission method flow chart for the reference signal that another embodiment of the application provides.The embodiment is shown in Fig. 6
The method of embodiment corresponding second network equipment side matches confidence what is involved is second network equipment reception reference signal resource
Breath receives the process for the reference signal that first network equipment is sent according to reference signal resource, as shown in figure 8, this method comprises:
Step 201, second network equipment receive the configuration information for the reference signal resource that first network equipment is sent；With reference to
Signal resource includes at least one of time-domain resource, frequency domain resource, code domain resource and port information of reference signal.
In the present embodiment, the detailed description of reference signal resource can refer to the detailed description in embodiment illustrated in fig. 6, this
Place repeats no more.
Step 201, the second network equipment receive first network according to the configuration information of the reference signal resource received and set
The reference signal that preparation is sent.
The transmission method for the reference signal that the embodiment of the present disclosure provides, second network equipment receive first network equipment and send
Reference signal resource configuration information, according to the configuration information of the reference signal resource received receive first network equipment hair
The reference signal sent according to specific channel measurement demand is since reference signal resource is by first network equipment in real time
The resource of two network equipments configurations receives reference signal according to the reference signal resource, adaptively can meet different channels
Measurement demand, moreover, the configuration method is expansible, flexibility is good.
Fig. 9 is the transmitting device block diagram for the reference signal that one embodiment of the application provides.The transmitting device of the reference signal
For first network equipment, as shown in figure 9, the device includes configuration module 11, the first sending module 12 and the second sending module 13.
Configuration module 11 is used to be the second network equipments configuration reference signal resource, and reference signal resource includes the time domain money of reference signal
At least one of source, frequency domain resource, code domain resource and port information.First sending module 12 is used for reference signal resource
Configuration information is sent to second network equipment.Second sending module 13 is used to send out using reference signal resource to second network equipment
Send reference signal.
Optionally, if reference signal resource includes time-domain resource, time-domain resource includes the time list for sending reference signal
At least one of first number and time quantum location information.
Further, if reference signal resource includes time-domain resource and frequency domain resource, when the reference signal of configuration when
Between unit number when being greater than or equal to 2, at least there is the first reference signal resource of port P and the second ginseng of a port P
Signal resource is examined, there are at least one identical running time-frequency resource lists with the second reference signal resource for the first reference signal resource
Member；Wherein, P is the positive integer more than or equal to 2.
Still further, the first reference signal resource is with the second reference signal resource at least one identical running time-frequency resource
Orthogonal intersection mapping on unit is identical.
That is, the orthogonal intersection mapping on the corresponding running time-frequency resource unit of the first reference signal resource is with second with reference to letter
Orthogonal intersection on number corresponding running time-frequency resource unit of resource is mapped in the running time-frequency resource list of two reference signal resources overlapping
It is identical in member.Optionally, if reference signal resource includes code domain resource, code domain resource includes that reference signal is corresponding orthogonal
At least one of length and mapping pattern of spreading code.
Further, code domain resource further include: code of the reference signal on every S time quantum in T time quantum
Domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if reference signal resource includes port information, port information is reference signal on T time quantum
Port information, and port information includes port number of the reference signal on T time quantum, reference signal in T time quantum
In every S time quantum at least one of port density, port mapping and port interval；Wherein, S be more than or equal to
1 is less than or equal to the positive integer of T.
Optionally, the first sending module 12 is specifically used for join by least one of high-level signaling and physical layer signaling
The configuration information for examining signal resource is sent to second network equipment.
The transmitting device of the reference signal provided in the present embodiment can be used for executing in aforementioned embodiment illustrated in fig. 6
Technical solution, implementing principle and technical effect are similar with embodiment of the method, and details are not described herein.
Figure 10 is the transmitting device block diagram for the reference signal that another embodiment of the application provides.As shown in Figure 10, the device
Including the first receiving module 21 and the second receiving module 22.First receiving module 21 is used to receive the ginseng of first network equipment transmission
Examine the configuration information of signal resource；Reference signal resource includes time-domain resource, frequency domain resource, code domain resource and the end of reference signal
At least one of message breath.Second receiving module 22 is used to receive the ginseng that first network equipment is sent according to reference signal resource
Examine signal.
Optionally, if reference signal resource includes time-domain resource, time-domain resource includes the time list for sending reference signal
At least one of first number and time quantum location information.
Further, if reference signal resource includes time-domain resource and frequency domain resource, when the reference signal of configuration when
Between unit number when being greater than or equal to 2, at least there is the first reference signal resource of port P and the second ginseng of a port P
Signal resource is examined, there are at least one identical running time-frequency resource lists with the second reference signal resource for the first reference signal resource
Member；Wherein, P is the positive integer more than or equal to 2.
Still further, the first reference signal resource is with the second reference signal resource at least one identical running time-frequency resource
Orthogonal intersection mapping on unit is identical.
Optionally, if reference signal resource includes code domain resource, code domain resource includes the corresponding orthogonal spectrum expansion of reference signal
At least one of length and mapping pattern of code.
Further, code domain resource further include: code of the reference signal on every S time quantum in T time quantum
Domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if reference signal resource includes port information, port information is reference signal on T time quantum
Port information, and port information includes port number of the reference signal on T time quantum, reference signal in T time quantum
In every S time quantum at least one of port density, port mapping and port interval；Wherein, S be more than or equal to
1 is less than or equal to the positive integer of T.
The transmitting device of the reference signal provided in the present embodiment can be used for executing in aforementioned embodiment illustrated in fig. 8
Technical solution, implementing principle and technical effect are similar with embodiment of the method, and details are not described herein.
Figure 11 is the transmission device block diagram for the reference signal that one embodiment of the application provides.As shown in figure 11, the equipment packet
Include processor 31 and transmitter 32.Processor 31 is used to be the second network equipments configuration reference signal resource, reference signal resource
At least one of time-domain resource, frequency domain resource, code domain resource and port information including reference signal.Transmitter 32 is used for will
The configuration information of reference signal resource is sent to second network equipment, and is sent using reference signal resource to second network equipment
Reference signal.
Optionally, if reference signal resource includes time-domain resource, time-domain resource includes the time list for sending reference signal
At least one of first number and time quantum location information.
Further, if reference signal resource includes time-domain resource and frequency domain resource, when the reference signal of configuration when
Between unit number when being greater than or equal to 2, at least there is the first reference signal resource of port P and the second ginseng of a port P
Signal resource is examined, there are at least one identical running time-frequency resource lists with the second reference signal resource for the first reference signal resource
Member；Wherein, P is the positive integer more than or equal to 2.
Still further, the first reference signal resource is with the second reference signal resource at least one identical running time-frequency resource
Orthogonal intersection mapping on unit is identical.
Optionally, if reference signal resource includes code domain resource, code domain resource includes the corresponding orthogonal spectrum expansion of reference signal
At least one of length and mapping pattern of code.
Further, code domain resource further include: code of the reference signal on every S time quantum in T time quantum
Domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if reference signal resource includes port information, port information is reference signal on T time quantum
Port information, and port information includes port number of the reference signal on T time quantum, reference signal in T time quantum
In every S time quantum at least one of port density, port mapping and port interval；Wherein, S be more than or equal to
1 is less than or equal to the positive integer of T.
Optionally, the configuration information of reference signal resource is sent to second network equipment by transmitter 32, comprising: transmitter
The configuration information of reference signal resource is sent to the second network by least one of high-level signaling and physical layer signaling by 32
Equipment.
The transmission device of the reference signal provided in the present embodiment can be used for executing in aforementioned embodiment illustrated in fig. 6
Technical solution, implementing principle and technical effect are similar with embodiment of the method, and details are not described herein.
Figure 12 is the transmission device block diagram for the reference signal that another embodiment of the application provides.As shown in figure 12, the equipment
Including processor 41 and receiver 42.Processor 41 controls and receives device 42 and receives the reference signal resource that first network equipment is sent
Configuration information；And the reference signal that first network equipment is sent is received according to reference signal resource；Reference signal resource includes
At least one of time-domain resource, frequency domain resource, code domain resource and port information of reference signal.
Optionally, if reference signal resource includes time-domain resource, time-domain resource includes the time list for sending reference signal
At least one of first number and time quantum location information.
Further, if reference signal resource includes time-domain resource and frequency domain resource, when the reference signal of configuration when
Between unit number when being greater than or equal to 2, at least there is the first reference signal resource of port P and the second ginseng of a port P
Signal resource is examined, there are at least one identical running time-frequency resource lists with the second reference signal resource for the first reference signal resource
Member；Wherein, P is the positive integer more than or equal to 2.
Still further, the first reference signal resource is with the second reference signal resource at least one identical running time-frequency resource
Orthogonal intersection mapping on unit is identical.
Optionally, if reference signal resource includes code domain resource, code domain resource includes the corresponding orthogonal spectrum expansion of reference signal
At least one of length and mapping pattern of code.
Further, code domain resource further include: code of the reference signal on every S time quantum in T time quantum
Domain resource；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
Optionally, if reference signal resource includes port information, port information is reference signal on T time quantum
Port information, and port information includes port number of the reference signal on T time quantum, reference signal in T time quantum
In every S time quantum at least one of port density, port mapping and port interval；Wherein, S be more than or equal to
1 is less than or equal to the positive integer of T.
The transmission device of the reference signal provided in the present embodiment can be used for executing in aforementioned embodiment illustrated in fig. 8
Technical solution, implementing principle and technical effect are similar with embodiment of the method, and details are not described herein.
The application also provides a kind of readable storage medium storing program for executing, and instruction is stored in readable storage medium storing program for executing, when hair reference signal
When at least one processor of transmission device executes the instruction, the transmission device of reference signal executes any of the above-described embodiment of the method
The transmission method of the reference signal of middle offer.
The application also provides a kind of program product, which includes instruction, which is stored in readable storage medium storing program for executing
In.At least one processor for sending out the transmission device of reference signal can read the instruction from readable storage medium storing program for executing, and executing should
Instruction is so that the transmission device of hair hair reference signal implements the transmission method of the reference signal provided in either method embodiment.
Reference signal transmission device in the specific implementation, it should be understood that processor can be central processing unit (English
Text: Central Processing Unit, referred to as: CPU), it can also be other general processors, digital signal processor (English
Text: Digital Signal Processor, referred to as: DSP), specific integrated circuit (English: Application Specific
Integrated Circuit, referred to as: ASIC) etc..General processor can be microprocessor or the processor is also possible to
Any conventional processor etc..Hardware processor can be embodied directly in conjunction with the step of method disclosed in the present application to have executed
At, or in processor hardware and software module combination execute completion.
Realizing all or part of the steps of above-mentioned each method embodiment, this can be accomplished by hardware associated with program instructions.
Program above-mentioned can store in a readable access to memory.When being executed, execute includes above-mentioned each method embodiment to the program
The step of；And memory (storage medium) above-mentioned include: read-only memory (English: read-only memory, abbreviation:
ROM), RAM, flash memory, hard disk, solid state hard disk, tape (English: magnetic tape), floppy disk (English: floppy
Disk), CD (English: optical disc) and any combination thereof.
Claims (30)
1. a kind of transmission method of reference signal, which is characterized in that the described method includes:
First network equipment is the second network equipments configuration reference signal resource, and the reference signal resource includes described with reference to letter
Number at least one of time-domain resource, frequency domain resource, code domain resource and port information；
The configuration information of the reference signal resource is sent to second network equipment by the first network equipment；
The first network equipment sends the reference signal to second network equipment using the reference signal resource.
2. the method according to claim 1, wherein if the reference signal resource includes time-domain resource, institute
Stating time-domain resource includes sending at least one of time quantum number and time quantum location information of the reference signal.
3. according to the method described in claim 2, it is characterized in that, if the reference signal resource includes time-domain resource and frequency domain
Resource at least has the first of a port P then when the time quantum number of the reference signal of configuration is greater than or equal to 2
Second reference signal resource of reference signal resource and a port P, first reference signal resource and second reference
There are at least one identical running time-frequency resource units in signal resource；Wherein, P is the positive integer more than or equal to 2.
4. according to the method described in claim 3, it is characterized in that, first reference signal resource and described second is with reference to letter
The orthogonal intersection mapping of number resource at least one described identical running time-frequency resource unit is identical.
5. described the method according to claim 1, wherein if the reference signal resource includes code domain resource
Code domain resource includes at least one of length and mapping pattern of the corresponding orthogonal intersection of the reference signal.
6. according to the method described in claim 5, it is characterized in that, the code domain resource further include: the reference signal is at T
The code domain resource on every S time quantum in time quantum；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
7. the method according to claim 1, wherein if the reference signal resource includes the port information,
The port information is port information of the reference signal on T time quantum, and the port information includes the ginseng
Signal is examined in the port number, the reference signal on T time quantum on every S time quantum in T time quantum
At least one of port density, port mapping and port interval；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
8. the method according to claim 1, wherein the first network equipment is by the reference signal resource
Configuration information is sent to second network equipment, comprising:
The first network equipment passes through at least one of high-level signaling and physical layer signaling for the reference signal resource
Configuration information is sent to second network equipment.
9. a kind of transmission method of reference signal, which is characterized in that the described method includes:
Second network equipment receives the configuration information for the reference signal resource that first network equipment is sent；The reference signal resource
At least one of time-domain resource, frequency domain resource, code domain resource and port information including the reference signal；
Second network equipment, which receives the reference that the first network equipment is sent according to the reference signal resource, to be believed
Number.
10. according to the method described in claim 9, it is characterized in that, if the reference signal resource includes time-domain resource, institute
Stating time-domain resource includes sending at least one of time quantum number and time quantum location information of the reference signal.
11. according to the method described in claim 10, it is characterized in that, if the reference signal resource includes time-domain resource and frequency
At least there is the of port P then when the time quantum number of the reference signal of configuration is greater than or equal to 2 in domain resource
Second reference signal resource of one reference signal resource and a port P, first reference signal resource and second ginseng
Examine in signal resource that there are at least one identical running time-frequency resource units；Wherein, P is the positive integer more than or equal to 2.
12. according to the method for claim 11, which is characterized in that first reference signal resource and second reference
Orthogonal intersection mapping of the signal resource at least one described identical running time-frequency resource unit is identical.
13. described according to the method described in claim 9, it is characterized in that, if the reference signal resource includes code domain resource
Code domain resource includes at least one of length and mapping pattern of the corresponding orthogonal intersection of the reference signal.
14. according to the method for claim 13, which is characterized in that the code domain resource further include: the reference signal is in T
The code domain resource on every S time quantum in a time quantum；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
15. according to the method described in claim 9, it is characterized in that, if the reference signal resource includes the port information,
The port information is port information of the reference signal on T time quantum, and the port information includes the ginseng
Signal is examined in the port number, the reference signal on T time quantum on every S time quantum in T time quantum
At least one of port density, port mapping and port interval；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
16. a kind of transmitting device of reference signal, which is characterized in that described device is the first network equipment, and described device includes:
Configuration module, for being the second network equipments configuration reference signal resource, the reference signal resource includes the reference
At least one of time-domain resource, frequency domain resource, code domain resource and port information of signal；
First sending module, for the configuration information of the reference signal resource to be sent to second network equipment；
Second sending module, for sending the reference signal to second network equipment using the reference signal resource.
17. device according to claim 16, which is characterized in that if the reference signal resource includes time-domain resource,
The time-domain resource includes sending at least one of time quantum number and time quantum location information of the reference signal.
18. device according to claim 17, which is characterized in that if the reference signal resource includes time-domain resource and frequency
At least there is the of port P then when the time quantum number of the reference signal of configuration is greater than or equal to 2 in domain resource
Second reference signal resource of one reference signal resource and a port P, first reference signal resource and second ginseng
Examine in signal resource that there are at least one identical running time-frequency resource units；Wherein, P is the positive integer more than or equal to 2.
19. device according to claim 18, which is characterized in that first reference signal resource and second reference
Orthogonal intersection mapping of the signal resource at least one described identical running time-frequency resource unit is identical.
20. device according to claim 16, which is characterized in that if the reference signal resource includes code domain resource, institute
State at least one of length and the mapping pattern that code domain resource includes the corresponding orthogonal intersection of the reference signal.
21. device according to claim 20, which is characterized in that the code domain resource further include: the reference signal is in T
The code domain resource on every S time quantum in a time quantum；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
22. device according to claim 16, which is characterized in that if the reference signal resource includes the port letter
Breath, the port information is port information of the reference signal on T time quantum, and the port information includes described
Reference signal is in the port number, the reference signal on T time quantum on every S time quantum in T time quantum
At least one of port density, port mapping and port interval；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
23. device according to claim 16, which is characterized in that first sending module is specifically used for through high-rise letter
The configuration information of the reference signal resource is sent to second network equipment by least one of order and physical layer signaling.
24. a kind of transmitting device of reference signal, which is characterized in that described device is second network equipment, and described device includes:
First receiving module, the configuration information of the reference signal resource for receiving the transmission of first network equipment；The reference letter
Number resource includes at least one of time-domain resource, frequency domain resource, code domain resource and port information of the reference signal；
Second receiving module is believed for receiving the reference that the first network equipment is sent according to the reference signal resource
Number.
25. device according to claim 24, which is characterized in that if the reference signal resource includes time-domain resource,
The time-domain resource includes sending at least one of time quantum number and time quantum location information of the reference signal.
26. device according to claim 25, which is characterized in that if the reference signal resource includes time-domain resource and frequency
At least there is the of port P then when the time quantum number of the reference signal of configuration is greater than or equal to 2 in domain resource
Second reference signal resource of one reference signal resource and a port P, first reference signal resource and second ginseng
Examine in signal resource that there are at least one identical running time-frequency resource units；Wherein, P is the positive integer more than or equal to 2.
27. device according to claim 26, which is characterized in that first reference signal resource and second reference
Orthogonal intersection mapping of the signal resource at least one described identical running time-frequency resource unit is identical.
28. device according to claim 24, which is characterized in that if the reference signal resource includes code domain resource, institute
State at least one of length and the mapping pattern that code domain resource includes the corresponding orthogonal intersection of the reference signal.
29. device according to claim 28, which is characterized in that the code domain resource further include: the reference signal is in T
The code domain resource on every S time quantum in a time quantum；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
30. device according to claim 24, which is characterized in that if the reference signal resource includes the port letter
Breath, the port information is port information of the reference signal on T time quantum, and the port information includes described
Reference signal is in the port number, the reference signal on T time quantum on every S time quantum in T time quantum
At least one of port density, port mapping and port interval；Wherein, S is the positive integer for being less than or equal to T more than or equal to 1.
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| CN201710435763.2A CN108989008B (en) | 2017-06-05 | 2017-06-05 | Transmission method, device and equipment of reference signal |
| PCT/CN2018/089262 WO2018223891A1 (en) | 2017-06-05 | 2018-05-31 | Reference signal transmission method, apparatus and device |
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| CN201710435763.2A CN108989008B (en) | 2017-06-05 | 2017-06-05 | Transmission method, device and equipment of reference signal |
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| WO2021139833A1 (en) * | 2020-01-09 | 2021-07-15 | 展讯通信（上海）有限公司 | Reference signal determination method and apparatus, electronic device, and storage medium |
| CN112075049A (en) * | 2020-08-06 | 2020-12-11 | 北京小米移动软件有限公司 | Reference signal configuration and receiving method and device, network equipment, user equipment and storage medium |
| CN112075049B (en) * | 2020-08-06 | 2023-10-03 | 北京小米移动软件有限公司 | Method and device for configuring and receiving reference signals, network equipment, user equipment and storage medium |
Also Published As
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| CN108989008B (en) | 2021-12-14 |
| WO2018223891A1 (en) | 2018-12-13 |
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