CN110401520A - Demodulated reference signal configuration method, device, base station and user equipment - Google Patents
Demodulated reference signal configuration method, device, base station and user equipment Download PDFInfo
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- CN110401520A CN110401520A CN201910685389.0A CN201910685389A CN110401520A CN 110401520 A CN110401520 A CN 110401520A CN 201910685389 A CN201910685389 A CN 201910685389A CN 110401520 A CN110401520 A CN 110401520A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The embodiment of the present invention provides a kind of demodulated reference signal configuration method, device, base station and user equipment, this method comprises: after base station is by obtaining the second pilot density to the first DMRS progress automatic adjusument determined using unique pilot density and pilot frequency port mapping scheme, the signaling for carrying the second pilot density information is sent to user equipment, so that user equipment is based on second pilot density and obtains the 2nd DMRS, carries out carrying out channel estimation according to the 2nd DMRS and the downlink data sent to base station demodulates.During being somebody's turn to do, adaptive adjustment of the base station by the way that the first pilot density is incrementally increased or reduced reduces the expense of DMRS pilot tone to obtain the second pilot density to a certain extent.In addition, avoiding the drawbacks of cannot be considered in terms of the demodulation performance of low-density DMRS caused by pilot density and the DMRS of pilot frequency port mapping scheme sole mode configuration by adaptively adjusting pilot density.
Description
Technical field
The present embodiments relate to the communication technology more particularly to a kind of demodulated reference signal configuration method, device, base station and
User equipment.
Background technique
Currently, making single user multiple-input and multiple-output (Sing by disposing a large amount of antennas in base station side and user equipment side
User-Multiple Input Multiple Output, SU-MIMO) system formation higher-dimension input multi output (High
Dimensional Multiple Input Multiple Output, HD-MIMO) system.In HD-MIMO system, Yong Hushe
Reference signal (Reference Signal, RS) of the standby receiver based on precognition carries out channel estimation, and base to every antenna
In the downlink data that this reduction base station is sent.In a variety of RS, since the recovery of data channel places one's entire reliance upon demodulated reference signal
The estimation channel of (Demodulation Reference Signal, DMRS), therefore, DMRS estimate the accuracy logarithm of performance
Decisive role is played according to demodulation.
DMRS is the sequence for occupying certain frequency patterns, the pilot density of different DMRS, resource impact scheme, pilot tone end
At least one is different for mouth mapping scheme, and the channel estimation value obtained using different DMRS is also different.In the prior art, it adopts
The configuration of DMRS is carried out with pilot density and the unique mode of antenna terminal mapping scheme.Specifically, SU-MIMO maximum supports 8
The orthogonal DMRS multiplexing of layer, can the concurrent multiplexing 8 data transmission flowed.When the number of plies is 1 or 2, using code division multiplexing (Code
Division Multiplexing, CDM) mode orthogonalization DMRS signal, each resource block (Resource Block,
RB 12 resource units (Resource Element, RE) are occupied in)；DMRS RE distribution are as follows: frequency domain is the 2nd, the 7 of each RB
And on 12 subcarriers, time domain is on 6,7,13 and 14 symbols of each subframe, and every layer of DMRS pilot density is fixed as
3RE/RB, and pattern is mapped using identical pilot tone；And CDM+ frequency division multiplexing is used in the case where the number of plies is 3~8
The hybrid multiplex mode of (Frequency Division Multiplexing, FDM), occupies 24 RE altogether in each RB.
DMRS RE distribution are as follows: frequency domain be each RB the 1st, 2,6,7,11 and 12 subcarrier on, time domain be each subframe 6,7,
On 13 and 14 symbols, every layer of DMRS pilot density is also fixed to 3RE/RB, and maps pattern using identical pilot tone.It is connecing
When receiving end carries out DMRS channel estimation, the pilot density of 3RE/RB may be implemented more accurately to estimate.
However, to support more Stream Data Transmissions, being needed under HD-MIMO scene with the demand to mobile communication high capacity
The DMRS of higher order is supported to be multiplexed.To meet the pilot density of every layer of 3RE/RB, then DMRS needs to occupy a RB more
More RE largely increase the expense of DMRS pilot tone.
Summary of the invention
The embodiment of the present invention provides a kind of demodulated reference signal configuration method, device, base station and user equipment, by adaptive
The pilot density and mapping scheme of the adjustment DMRS answered is led with reducing DMRS while guaranteeing precision of channel estimation as much as possible
The expense of frequency.
First aspect, the embodiment of the present invention provide a kind of demodulated reference signal configuration method, comprising:
Base station is adjusted to obtain the second pilot density to corresponding first pilot density of the first demodulated reference signal DMRS,
First DMRS is that the base station is determined according to network configuration cases；
The base station sends the signaling for carrying the second pilot density information to user equipment, so that the user equipment
The 2nd DMRS is generated according to second pilot density and carries out channel estimation.
In the possible implementation of in the first aspect the first, the base station is to corresponding first pilot tone of the first DMRS
Density is adjusted to obtain the second pilot density, comprising:
The feedback information that the base station is fed back according to the user equipment, to the first pilot density of the first DMRS into
Row adjusts the second pilot density.
In the possible implementation of second in the first aspect, the base station is to corresponding first pilot tone of the first DMRS
The pilot density after being adjusted is adjusted in density, comprising:
The base station is adjusted to obtain according to hybrid automatic repeat-request to the first pilot density of the first DMRS
Second pilot density.
In conjunction with the first or second of possible implementation of first aspect, first aspect, in the first aspect
The third possible implementation in, the base station is adjusted to obtain second to corresponding first pilot density of the first DMRS
After pilot density, further includes:
The base station determines the resource impact scheme and/or pilot tone of the 2nd DMRS according to second pilot density
Port mapping scheme；
The base station sends the resource impact scheme and/or pilot frequency port for carrying the 2nd DMRS to the user equipment
The signaling of mapping scheme information.
In conjunction with first aspect, first aspect the first, second or the third possible implementation, first
In 4th kind of possible implementation of a aspect, the base station sends to user equipment and carries the second pilot density information
Signaling, comprising:
The base station is to the user equipment via Physical Downlink Control Channel, Physical Broadcast Channel or high-level signaling mode
Send the signaling for carrying the second pilot density information.
The second aspect, the embodiment of the present invention provide a kind of demodulated reference signal configuration method, comprising:
User equipment receives the signaling for carrying the second pilot density information that base station is sent, and second pilot density is institute
State what corresponding first pilot density of the first demodulated reference signal DMRS was adjusted in base station, the first DMRS is institute
State what base station was determined according to network configuration cases；
The user equipment generates the 2nd DMRS according to second pilot density；
The user equipment carries out channel estimation according to the 2nd DMRS.
In the possible implementation of in the second aspect the first, second pilot density is the base station according to institute
The feedback information for stating user equipment feedback is adjusted to obtain to corresponding first pilot density of the first DMRS.
In the possible implementation of second in the second aspect, second pilot density is the base station according to mixed
It closes automatic repeat request corresponding first pilot density of the first DMRS is adjusted to obtain.
In conjunction with the first or second of possible implementation of the second aspect, the second aspect, in the second aspect
The third possible implementation in, the user equipment according to second pilot density generate the 2nd DMRS before, also
Include:
The user equipment according to second pilot density, determine the 2nd DMRS resource impact scheme and/or
Pilot frequency port mapping scheme.
In conjunction with the first or second of possible implementation of the second aspect, the second aspect, in the second aspect
The 4th kind of possible implementation in, the user equipment according to second pilot density generate the 2nd DMRS before, also
Include:
The user equipment receives the resource impact scheme and/or pilot tone for carrying the 2nd DMRS that the base station is sent
The signaling of port mapping scheme information.
In conjunction with the second aspect, the second aspect the first to any possible implementation in the 4th kind,
In 5th kind of possible implementation of two aspects, the user equipment receives the second pilot density of carrying letter that base station is sent
The signaling of breath, comprising:
The user equipment receives the base station via down control channel, Physical Broadcast Channel or in a manner of high-level signaling
The signaling of carrying the second pilot density information of transmission.
In terms of third, the embodiment of the present invention provides a kind of base station, comprising:
Adjustment module, for being adjusted to obtain second to corresponding first pilot density of the first demodulated reference signal DMRS
Pilot density, the first DMRS are that the base station is determined according to network configuration cases；
Sending module, for sending second pilot density for carrying the adjustment module and adjusting to user equipment
The signaling of information, so that the user equipment generates the 2nd DMRS according to second pilot density and carries out channel estimation.
In the possible implementation of in the third aspect the first, the adjustment module is specifically used for according to the use
The feedback information of family equipment feedback, is adjusted the second pilot density to the first pilot density of the first DMRS.
In the possible implementation of second in the third aspect, the adjustment module is specifically used for according to mixing certainly
Dynamic retransmission request, is adjusted to obtain the second pilot density to the first pilot density of the first DMRS.
The first in terms of in conjunction with third, in terms of third or second of possible implementation, in the third aspect
The third possible implementation in, the base station further include:
Determining module obtains for corresponding first pilot density of the first DMRS to be adjusted in the adjustment module
After two pilot densities, according to second pilot density, resource impact scheme and/or the pilot tone end of the 2nd DMRS are determined
Mouth mapping scheme；
The sending module is also used to send the resource impact scheme for carrying the 2nd DMRS to the user equipment
And/or the signaling of pilot frequency port mapping scheme information.
In conjunction in terms of third, third aspect the first, second or the third possible implementation, in third
In 4th kind of possible implementation of a aspect, the sending module is specifically used for the user equipment via under physics
Row control channel, Physical Broadcast Channel or high-level signaling mode send the signaling for carrying the second pilot density information.
4th aspect, the embodiment of the present invention provide a kind of user equipment, comprising:
Receiving module, the signaling of carrying the second pilot density information for receiving base station transmission, second pilot tone are close
It spends the base station corresponding first pilot density of the first demodulated reference signal DMRS is adjusted to obtain, described first
DMRS is that the base station is determined according to network configuration cases；
Generation module, second pilot density for being received according to the receiving module generate the 2nd DMRS；
Estimation module, the DMRS for being generated according to the generation module carry out channel estimation.
In the possible implementation of in the fourth aspect the first, second pilot density is the base station according to institute
The feedback information for stating user equipment feedback is adjusted to obtain to corresponding first pilot density of the first DMRS.
In the possible implementation of second in the fourth aspect, second pilot density is the base station according to mixed
It closes automatic repeat request corresponding first pilot density of the first DMRS is adjusted to obtain.
In conjunction with the first or second of possible implementation of the 4th aspect, the 4th aspect, in the fourth aspect
The third possible implementation in, the user equipment further include:
Determining module is used for before the generation module generates the 2nd DMRS according to second pilot density, according to
Second pilot density determines the resource impact scheme and/or pilot frequency port mapping scheme of the 2nd DMRS.
In conjunction with the first or second of possible implementation of the 4th aspect, the 4th aspect, in the fourth aspect
The 4th kind of possible implementation in, the receiving module is also used to close according to second pilot tone in the generation module
Before degree generates the 2nd DMRS, the resource impact scheme and/or pilot tone of carrying the 2nd DMRS that the base station is sent are received
The signaling of port mapping scheme information.
In conjunction with the 4th aspect, the 4th aspect the first to any possible implementation in the 4th kind, the
In 5th kind of possible implementation of four aspects, the receiving module is specifically used for wide via down control channel, physics
It broadcasts channel or receives the signaling for carrying the second pilot density information that the base station is sent in a manner of high-level signaling.
5th aspect, the embodiment of the present invention provide a kind of base station, comprising: processor and memory, the memory are deposited
Storage executes instruction, and when base station operation, communicates between the processor and the memory, described in the processor execution
It executes instruction so that the base station executes upper first aspect, first the first put to any possible reality in the 4th kind
Existing mode.
6th aspect, the embodiment of the present invention provide a kind of user equipment, comprising: processor and memory, the storage
Device storage executes instruction, and when user equipment operation, communicates between the processor and the memory, the processor
Executed instruction described in execution so that the user equipment execute upper the second aspect, the second aspect the first in the 5th kind
Any possible implementation.
The embodiment of the present invention provides a kind of demodulated reference signal configuration method, device, base station and user equipment, base station and passes through
Second is obtained to the first DMRS progress automatic adjusument determined using unique pilot density with pilot frequency port mapping scheme to lead
After frequent degree, the signaling for carrying the second pilot density information is sent to user equipment so that user equipment be based on this second
Pilot density obtains the 2nd DMRS, carries out carrying out channel estimation according to the 2nd DMRS and the downlink data sent to base station solves
It adjusts.Should during, base station is by adaptive adjustment that the first pilot density is incrementally increased or reduced to obtain second
Pilot density reduces the expense of DMRS pilot tone to a certain extent.In addition, avoiding leading by adaptively adjusting pilot density
It cannot be considered in terms of the demodulation performance of low-density DMRS caused by the DMRS that frequent degree and pilot frequency port mapping scheme sole mode configure
The drawbacks of.
Detailed description of the invention
Fig. 1 is the flow chart of demodulated reference signal configuration method embodiment one of the present invention；
Fig. 2 is the flow chart of demodulated reference signal configuration method embodiment two of the present invention；
Fig. 3 is the structural schematic diagram of demodulated reference signal configuration device embodiment one of the present invention；
Fig. 4 is the structural schematic diagram of demodulated reference signal configuration device embodiment two of the present invention；
Fig. 5 is the structural schematic diagram of demodulated reference signal configuration device embodiment three of the present invention；
Fig. 6 is the structural schematic diagram of demodulated reference signal configuration device example IV of the present invention；
Fig. 7 is the structural schematic diagram of base station embodiment of the present invention；
Fig. 8 is the structural schematic diagram of user equipment embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In general, DMRS and user data use identical pretreatment mode, have a characteristic that (1) user spy
Fixed (UE-specific's), i.e., the corresponding demodulated reference signal of each terminal data uses identical pre-coding matrix；
(2) from the point of view of network side, the DMRS of each layer transmission is mutually orthogonal；(3) DMRS is generally used to support beam forming and precoding
Technology, thus only sent on scheduled resource block, the quantity of transmission is related to the number of plies, it is corresponded with antenna port, and
Non-physical antenna number, the former is less than or equal to the latter, and the two is connected by layer mapping and precoding.When configuring DMRS,
It is in need of consideration because being known as pilot density, resource impact scheme, pilot frequency port mapping scheme and channel estimating performance etc..Its
In, pilot density referred to herein as: the resource element that DMRS is occupied on frequency domain in a resource block (Resource Block, RB)
The quantity of plain (Resource Element, RE), for example, if pilot density is 3, then it represents that DMRS is occupied on the frequency domain of a RB
3 RE, be represented by 3RE/RB；Resource impact scheme refers to specific position of the RE of DMRS occupancy on the running time-frequency resource of a RB
It sets, for example, it is assumed that DMRS occupies 12 RE, pilot density 3RE/RB, then it is each that its resource impact scheme, which can be frequency domain,
On the 2nd, 7 and 12 subcarrier of RB, time domain is on 6,7,13 and 14 symbols of each subframe；Pilot frequency port mapping scheme
Then refer to that DMRS port number distribution and multiplex strategy, it and the number of plies, the i.e. multiplexing order of DMRS and resource impact scheme are related.SU-
In MIMO, the channel estimation of DMRS will receive algorithm for estimating, channel conditions, the movement speed of user equipment and per stage DMRS
The influence of pilot density etc..In current standard, the downlink DMRS that base station is sent supports up to 8 layers of transmission, the time-frequency occupied
Resource is 24RE/RB, thus the pilot density of the DMRS of each port (Port) is 3RE/RB on frequency domain, at this point, user sets
For when carrying out DMRS channel estimation, the pilot density of 3RE/RB may be implemented more accurately to estimate.
However, in high-order SU-MIMO, it is desirable that the number of plies that DMRS is supported is higher, for example, it is desired to realize 24 layers of transmission.If
Reach the pilot density of existing every layer of 3RE/RB, DMRS needs to occupy 72 RE/RB, at this point, DMRS pilot-frequency expense will be high
Up to 43%.
In addition, in high-order SU-MIMO system, before other many factors suffered by DMRS channel estimation are changed
It puts, identical DMRS pilot density and pilot frequency port mapping scheme can also obtain different estimation performances.For example, due to
The pilot density of every layer of DMRS is greatly reduced, and the estimation performance of DMRS selects characteristic and related to channel time selectivity and channel frequency
Property is more sensitive.It, then can not be simultaneous according to unique pilot density and pilot frequency port mapping scheme in high fluxion DMRS multiplexing
The demodulation performance and level of overhead of low-density DMRS are cared for, system robustness is difficult to be guaranteed.For example, being selected in channel frequency serious
In ETU channel, the pilot density of 1RE/RB almost makes Wiener algorithm be difficult to restrain, and can only be close using the pilot tone of 2RE/RB
Degree could obtain acceptable DMRS estimation performance；And selected in minimum EPA channel in channel frequency, using identical channel
Under the premise of algorithm for estimating, the pilot density of 1RE/RB can obtain extraordinary performance, at this point, if also using leading for 2RE/RB
Frequent degree, it will largely waste of resource increases overhead.
In view of this, the embodiment of the present invention proposes that one kind is adaptively adjusted DMRS pilot density and pilot frequency port mapping side
The DMRS configuration method of case, to solve the DMRS of pilot density in the prior art and the configuration of pilot frequency port mapping scheme sole mode
The caused demodulation performance that cannot be considered in terms of low-density DMRS and the big drawback of expense.
Fig. 1 is the flow chart of demodulated reference signal configuration method embodiment one of the present invention.The executing subject of the present embodiment is
Base station needs dynamic to adjust the scene of DMRS pilot density when base station sends downlink data suitable for high-order SU-MIMO system.
Specifically, the present embodiment includes the following steps:
101, base station is adjusted to obtain the second pilot tone to corresponding first pilot density of the first demodulated reference signal DMRS
Density, the first DMRS are that base station is determined according to network configuration cases.
In this step, base station determines the first DMRS, this first according to network configuration cases, such as antenna number, transmission order
MDRS is the DMRS determined using unique pilot density and pilot frequency port mapping scheme.It is with pilot density 3RE/RB
Example, when transmitting the number of plies is 8, the pilot density of every layer of DMRS is 3RE/RB, and when transmitting the number of plies is 12 layers, every layer of DMRS's is led
Frequent degree is 2RE/RB, and when transmitting the number of plies is 24, the pilot density of every layer of DMRS is that 1RE/RB ... the process is equivalent to one
The process of a initialization.
After determining the first DMRS, the pilot density of the first DMRS of base station automatic adjusument is clear the following are describing
For the sake of, the pilot density for the first DMRS that initialization obtains is referred to as the first pilot density, the first pilot density will be adjusted
The pilot density obtained afterwards is referred to as the second pilot density.During adaptive adjustment, base station is by incrementally increasing or reducing the
One pilot density is to obtain the second pilot density, the pilot density of second pilot density and current high-order SU-MIMO system
It adapts to, meets the robust performance of high-order SU-MIMO system.
102, base station sends the signaling for carrying the second pilot density information to user equipment, so that user equipment is according to second
Pilot density generates the 2nd DMRS and carries out channel estimation.
After adaptively adjusting to the first pilot density and obtaining the second pilot density, base station is by the second pilot density information
Carrying is sent to user equipment in the signaling, so that user equipment is based on second pilot density and obtains the 2nd DMRS, carries out root
Channel estimation is carried out according to the 2nd DMRS and the downlink data sent to base station demodulates.Wherein, the second pilot density information can
Think the second pilot density or pilot density adjustment information, such as the incrementss or reduction amount of pilot density.
Demodulated reference signal configuration method provided in an embodiment of the present invention, base station pass through to using unique pilot density and leading
After the first DMRS progress automatic adjusument that frequency port mapping scheme is determined obtains the second pilot density, by the second pilot density
Information carrying is sent to user equipment in the signaling, so that user equipment is based on second pilot density and obtains the 2nd DMRS, into
Row carries out channel estimation according to the 2nd DMRS and the downlink data sent to base station demodulates.Should during, base station by pair
The adaptive adjustment that first pilot density is incrementally increased or reduced subtracts to a certain extent to obtain the second pilot density
The small expense of DMRS pilot tone.In addition, avoiding pilot density and pilot frequency port mapping scheme by adaptively adjusting pilot density
The drawbacks of cannot be considered in terms of the demodulation performance of low-density DMRS caused by the DMRS of sole mode configuration.
Optionally, in above-described embodiment one, the feedback information that base station can be fed back according to user equipment is corresponding to the first DMRS
The first pilot density the second pilot density is adjusted.
Specifically, base station based on the feedback module of user equipment feed back (feedback module of user equipment is anti-for synthesizing
Feedforward information, such as average speed) feedback information, it dynamically adjusts corresponding first pilot density of the first DMRS and is led to obtain second
Frequent degree, and the second pilot density establishes the pilot frequency port mapping scheme and/or resource impact scheme of the 2nd DMRS according to this.Its
In, feedback information includes but is not limited to the opposite average speed between base station and user equipment, the environmental information etc. of user equipment.Example
Such as, if opposite average speed is increased sharply or when environment becomes severe suddenly, base station needs positive adjustment pilot density to protect
Precision of channel estimation is demonstrate,proved to realize correct decoding；Conversely, it is close that base station reverse adjusts pilot tone if opposite average speed gradually becomes smaller
Degree, and new density establishes the pilot frequency port mapping and/or resource impact scheme of the 2nd DMRS according to this.Signaling is generated based on this；With
To indicate that receiving end pilot density changes.
Optionally, in above-described embodiment one, base station can be according to hybrid automatic repeat-request (Hybrid Automatic
Repeat Request, HARQ), corresponding first pilot density of the first DMRS is adjusted to obtain the second pilot density.
Specifically, system default base station one data grouping packet of every transmission is with regard to temporary in automatic repeat request stop-and-wait
Stop, waits the confirmation message of user equipment.When data packet reaches user equipment, error detection is carried out to it, if receiving correctly,
Confirmation (ACK) signal is returned to, mistake, which then returns, does not confirm (NACK) signal.The estimation performance of user equipment reflects to a certain extent
In ACK/NACK information, if what user equipment fed back always is NACK signal, base station forward direction adjusts pilot density to be promoted
Precision of channel estimation, on the contrary pilot density can be suitably reduced to improve throughput of system.
Optionally, in above-described embodiment one, base station is adjusted to obtain to corresponding first pilot density of the first DMRS
After second pilot density, the resource impact scheme and/or pilot frequency port of the 2nd DMRS can be determined according to second pilot density
Mapping scheme.Then, the resource impact scheme and/or pilot frequency port mapping scheme letter for carrying the 2nd DMRS are sent to user equipment
The signaling of breath.
Specifically, base station can directly determine out the relevant information of the 2nd DMRS, such as the second pilot density, resource impact side
Case and pilot frequency port mapping scheme etc., and the relevant information of the 2nd DMRS determined is sent to user equipment, so that user
Equipment restores the 2nd DMRS according to the second pilot density, resource impact scheme, pilot frequency port mapping scheme etc., and according to
Two DMRS carry out channel estimation, demodulate to the downlink data of base station transmission.
Optionally, in above-described embodiment one, base station can be generated in advance pilot density, resource impact scheme, pilot frequency port and reflect
The corresponding relationship between scheme three is penetrated, and assigns call number for each corresponding relationship to provide index.In this way, base station
After determining the second pilot density, it can determine that the second pilot density is corresponding according to second pilot density and call number
Resource impact scheme and pilot frequency port mapping scheme.Then, by the second pilot density, resource corresponding with the second pilot density
Mapping scheme and pilot frequency port mapping scheme are sent to user equipment；Alternatively, it is close pilot tone can also to be generated in advance on user equipment
Degree, resource impact scheme, the corresponding relationship between pilot frequency port mapping scheme three, and index is assigned for each corresponding relationship
Number to provide index.In this way, which base station is set determining the second pilot density and second pilot density is sent to user
After standby, user equipment can determine the corresponding resource impact of the second pilot density according to second pilot density and call number
Scheme and pilot frequency port mapping scheme.
Optionally, in above-described embodiment one, base station can will carry the signaling of the second pilot density information via physical down
Control channel (Physical Downlink Control Channel, PDCCH), Physical Broadcast Channel (Physical
Broadcast Channel, PBCH) or high-level signaling be sent to user equipment.When base station needs to correspond to the second pilot density
Resource impact scheme and pilot frequency port mapping scheme when being also sent to user equipment, carry the related signaling of those the 2nd DMRS
It can be sent via PDCCH, PBCH or high-level signaling.
Optionally, in above-described embodiment one, it is contemplated that backward compatibility, for a RB, can by time domain the 6th, 7,
13,12 subcarriers on 14 symbols are for sending DMRS.
Fig. 2 is the flow chart of demodulated reference signal configuration method embodiment two of the present invention.The executing subject of the present embodiment is
User equipment needs dynamic adjustment DMRS pilot density when base station sends downlink data suitable for high-order SU-MIMO system
Scene.Specifically, the present embodiment includes the following steps:
201, user equipment receives the signaling for carrying the second pilot density information that base station is sent, and the second pilot density is base
It stands and corresponding first pilot density of the first demodulated reference signal DMRS is adjusted, the first DMRS is base station according to net
What network configuring condition determined.
In this step, the associated description in relation to the first pilot density, the second pilot density information can be found in above-mentioned Fig. 1 step
101, details are not described herein again.
202, user equipment generates the 2nd DMRS according to the second pilot density.
In this step, user equipment obtains the 2nd DMRS based on the second pilot density that base station is sent.
Optionally, in this step, if base station only sends the second pilot density to user equipment, at this point, user equipment is based on
Second pilot density determines resource impact scheme corresponding with second pilot density and pilot frequency port mapping scheme etc., so
Afterwards, it is generated according to the second pilot density, resource impact scheme corresponding with second pilot density and pilot frequency port mapping scheme
2nd DMRS.
Optionally, in this step, if base station other than the second pilot density is sent to user equipment, also send with this
The corresponding resource impact scheme of two pilot densities and pilot frequency port mapping scheme are to user equipment, at this point, the direct root of user equipment
Second is generated according to the second pilot density, resource impact scheme corresponding with second pilot density and pilot frequency port mapping scheme
DMRS。
Optionally, pilot density, resource impact scheme, pilot frequency port can be previously stored in this step, on user equipment
Corresponding relationship between mapping scheme three, and call number is assigned for each corresponding relationship to provide index.In this way, with
Family equipment after receiving the signaling of carrying the second pilot density information of base station transmission, can according to second pilot density and
Call number determines the corresponding resource impact scheme of the second pilot density and pilot frequency port mapping scheme.Then, it is led according to second
Frequent degree, resource impact scheme corresponding with second pilot density and pilot frequency port mapping scheme generate the 2nd DMRS.
203, user equipment carries out channel estimation according to the 2nd DMRS.
In this step, user equipment carries out channel estimation according to the 2nd DMRS and the downlink data sent to base station solves
It adjusts.
Demodulated reference signal configuration method provided in an embodiment of the present invention, user equipment receive the carrying second that base station is sent
The signaling of pilot density information, second pilot density are base station to true using unique pilot density and pilot frequency port mapping scheme
The first DMRS made carries out what automatic adjusument obtained, and then, user equipment is based on second pilot density and obtains second
DMRS, carries out carrying out channel estimation according to the 2nd DMRS and the downlink data sent to base station demodulates.During being somebody's turn to do, second
Pilot density is that the adaptive adjustment that base station is incrementally increased or reduced to the first pilot density obtains, to a certain extent
Reduce the expense of DMRS pilot tone.In addition, avoiding pilot density and pilot frequency port mapping side by adaptively adjusting pilot density
The drawbacks of cannot be considered in terms of the demodulation performance of low-density DMRS caused by the DMRS of case sole mode configuration.
Optionally, in above-described embodiment two, the second pilot density is, for example, the feedback letter that base station is fed back according to user equipment
Breath is adjusted to obtain to corresponding first pilot density of the first DMRS.
Optionally, in above-described embodiment two, the second pilot density be, for example, base station according to hybrid automatic repeat-request to
Corresponding first pilot density of one DMRS is adjusted to obtain.
Optionally, in above-described embodiment two, user equipment can carry the via receptions such as PDCCH, PBCH or high-level signalings
The signaling of two pilot density information.
Optionally, in above-described embodiment two, it is contemplated that backward compatibility, for a RB, can by time domain the 6th, 7,
13,12 subcarriers on 14 symbols are for receiving DMRS.
Fig. 3 is the structural schematic diagram of demodulated reference signal configuration device embodiment one of the present invention.Solution provided in this embodiment
Adjusting reference signal configuration device is Installation practice corresponding with Fig. 1 embodiment of the present invention, and specific implementation process is no longer superfluous herein
It states.Specifically, demodulated reference signal configuration device 100 provided in this embodiment includes:
Adjustment module 11 obtains for corresponding first pilot density of the first demodulated reference signal DMRS to be adjusted
Two pilot densities, the first DMRS are that the demodulated reference signal configuration device is determined according to network configuration cases；
Sending module 12, for sending second pilot tone for carrying the adjusting of adjustment module 11 and obtaining to user equipment
The signaling of density information is estimated so that the user equipment generates the 2nd DMRS and carry out channel according to second pilot density
Meter.
Demodulated reference signal configuration device provided in an embodiment of the present invention, by using unique pilot density and pilot tone end
After the first DMRS progress automatic adjusument that mouth mapping scheme is determined obtains the second pilot density, by the second pilot density information
Carrying is sent to user equipment in the signaling, so that user equipment is based on second pilot density and obtains the 2nd DMRS, carries out root
Channel estimation is carried out according to the 2nd DMRS and the downlink data sent to demodulated reference signal configuration device demodulates.The process
In, demodulated reference signal configuration device by the first pilot density is incrementally increased or is reduced it is adaptive adjustment to
To the second pilot density, the expense of DMRS pilot tone is reduced to a certain extent.In addition, by adaptively adjusting pilot density,
It cannot be considered in terms of the solution of low-density DMRS caused by the DMRS for avoiding pilot density and pilot frequency port mapping scheme sole mode from configuring
The drawbacks of tonality energy.
Optionally, in an embodiment of the present invention, adjustment module 11, it is anti-specifically for being fed back according to the user equipment
The second pilot density is adjusted to the first pilot density of the first DMRS in feedforward information.
Optionally, in an embodiment of the present invention, the adjustment module 11, specifically for being asked according to mixed automatic retransfer
It asks, the first pilot density of the first DMRS is adjusted to obtain the second pilot density.
Fig. 4 is the structural schematic diagram of demodulated reference signal configuration device embodiment two of the present invention.As shown in figure 4, this implementation
The demodulated reference signal configuration device 100 of example is on the basis of Fig. 3 structure, further, further includes:
Determining module 13, for corresponding first pilot density of the oneth DMRS to be adjusted in the adjustment module 11
To after the second pilot density, according to second pilot density, determines the resource impact scheme of the 2nd DMRS and/or lead
Frequency port mapping scheme；
The sending module 12, be also used to the user equipment send carry the 2nd DMRS resource impact scheme and/
Or the signaling of pilot frequency port mapping scheme information.
Optionally, in an embodiment of the present invention, the sending module 12 is specifically used for the user equipment via object
Reason down control channel, Physical Broadcast Channel or high-level signaling mode send the signaling for carrying the second pilot density information.
Fig. 5 is the structural schematic diagram of demodulated reference signal configuration device embodiment three of the present invention.Solution provided in this embodiment
Adjusting reference signal configuration device is Installation practice corresponding with Fig. 2 embodiment of the present invention, and specific implementation process is no longer superfluous herein
It states.Specifically, demodulated reference signal configuration device 200 provided in this embodiment includes:
Receiving module 21, the signaling of carrying the second pilot density information for receiving base station transmission, second pilot tone
The density base station is adjusted to obtain to corresponding first pilot density of the first demodulated reference signal DMRS, and described first
DMRS is that the base station is determined according to network configuration cases；
Generation module 22, second pilot density for being received according to the receiving module 21 generate second
DMRS；
Estimation module 23, the DMRS for being generated according to the generation module 22 carry out channel estimation.
Demodulated reference signal configuration device provided in an embodiment of the present invention receives the second pilot density of carrying that base station is sent
The signaling of information, second pilot density are base station to the determined using unique pilot density and pilot frequency port mapping scheme
One DMRS carries out automatic adjusument and obtains, and then, demodulated reference signal configuration device is based on second pilot density and obtains the
Two DMRS, carry out carrying out channel estimation according to the 2nd DMRS and the downlink data sent to base station demodulates.During being somebody's turn to do, the
Two pilot densities are that the adaptive adjustment that base station is incrementally increased or reduced to the first pilot density obtains, to a certain degree
On reduce the expense of DMRS pilot tone.In addition, avoiding pilot density and pilot frequency port from mapping by adaptively adjusting pilot density
The drawbacks of cannot be considered in terms of the demodulation performance of low-density DMRS caused by the DMRS of scheme sole mode configuration.
Optionally, in an embodiment of the present invention, second pilot density is the base station according to the demodulation reference
The feedback information of signal configuration device feedback is adjusted to obtain to corresponding first pilot density of the first DMRS.
Optionally, in an embodiment of the present invention, second pilot density is the base station according to mixed automatic retransfer
Request is adjusted to obtain to corresponding first pilot density of the first DMRS.
Fig. 6 is the structural schematic diagram of demodulated reference signal configuration device example IV of the present invention.As shown in fig. 6, this implementation
The demodulated reference signal configuration device 200 of example is on the basis of Fig. 5 structure, further, further includes:
Determining module 24 is used for before the generation module 22 generates the 2nd DMRS according to second pilot density,
According to second pilot density, the resource impact scheme and/or pilot frequency port mapping scheme of the 2nd DMRS are determined.
Optionally, in an embodiment of the present invention, the receiving module 21 is also used in the generation module 22 according to institute
Before stating the 2nd DMRS of the second pilot density generation, the resource impact side for carrying the 2nd DMRS that the base station is sent is received
The signaling of case and/or pilot frequency port mapping scheme information.
Optionally, in an embodiment of the present invention, the receiving module 21 is specifically used for via down control channel, object
Reason broadcast channel or the signaling that carrying the second pilot density information that the base station is sent is received in a manner of high-level signaling.
Fig. 7 is the structural schematic diagram of base station embodiment of the present invention.As shown in fig. 7, base station 300 provided in this embodiment, packet
It includes: processor 31 and memory 32.Base station 300 can also include transmitter 33, receiver 34.Transmitter 33 and receiver 34 can
To be connected with processor 31.Wherein, transmitter 33 is for sending data or information, receiver 34 for receiving data or information,
The storage of memory 32 executes instruction, and when base station 300 is run, communicates between processor 31 and memory 32, processor 31 calls
Executing instruction in memory 32, for executing embodiment of the method shown in Fig. 1, it is similar that the realization principle and technical effect are similar, herein
It repeats no more.
Fig. 8 is the structural schematic diagram of user equipment embodiment of the present invention.As shown in figure 8, user provided in this embodiment sets
Standby 400, comprising: processor 41 and memory 42.User equipment 400 can also include transmitter 43, receiver 44.Transmitter 43
It can be connected with processor 41 with receiver 44.Wherein, transmitter 43 is for sending data or information, and receiver 44 is for receiving
Data or information, the storage of memory 42 execute instruction, and when user equipment 400 is run, lead between processor 41 and memory 42
Letter, processor 41 calls executing instruction in memory 42, for executing embodiment of the method shown in Fig. 2, realization principle and skill
Art effect is similar, and details are not described herein again.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (23)
1. a kind of demodulated reference signal configuration method characterized by comprising
User equipment receives the signaling of the information of carrying second pilot density from base station, and second pilot density is
Corresponding first pilot density of first demodulated reference signal DMRS is adjusted to obtain, the first DMRS is to be matched according to network
Set what situation determined；
The user equipment is based on second pilot density and obtains the 2nd DMRS.
2. the method according to claim 1, wherein the method also includes:
The user equipment sends feedback information to base station.
3. according to the method described in claim 2, it is characterized in that,
Second pilot density is to be adjusted to obtain to corresponding first pilot density of the first demodulated reference signal DMRS, packet
It includes:
Second pilot density be according to feedback information to corresponding first pilot density of the first demodulated reference signal DMRS into
Row is adjusted and is obtained.
4. described in any item methods according to claim 1~3, which is characterized in that the method also includes:
The signaling of the resource impact scheme of carrying twoth DMRS of the user equipment reception from base station, described second
The resource impact scheme of DMRS is determined according to second pilot density.
5. method according to any one of claims 1 to 4, which is characterized in that the method also includes:
The user equipment receives the signaling of the pilot frequency port mapping scheme information of carrying the 2nd DMRS from base station, institute
The pilot frequency port mapping scheme for stating the 2nd DMRS is determined according to second pilot density.
6. described in any item methods according to claim 1~5, which is characterized in that the user equipment is received from base station
Carry the signaling of the information of second pilot density, comprising:
The user equipment is received via Physical Downlink Control Channel, Physical Broadcast Channel or high-level signaling mode from base station
Carry the signaling of the information of second pilot density.
7. described in any item methods according to claim 1~6, which is characterized in that
The user equipment carries out channel estimation according to the 2nd DMRS.
8. a kind of demodulated reference signal configuration method characterized by comprising
User equipment receive the DMRS from base station relevant information, the relevant information of the DMRS be used to indicate pilot density,
At least one of resource impact scheme, pilot frequency port mapping scheme；
The user equipment obtains DMRS based on the relevant information of the DMRS.
9. according to the method described in claim 8, it is characterized in that, the method also includes:
The user equipment sends feedback information to base station.
10. according to the method described in claim 9, it is characterized in that,
The relevant information of the DMRS is determined according to the feedback information.
11. according to any method of claim 8-10, which is characterized in that
The user equipment receives the relevant information of the DMRS from base station, comprising:
The user equipment is received via Physical Downlink Control Channel, Physical Broadcast Channel or high-level signaling mode from base station
The relevant information of the DMRS.
12. a kind of communication device characterized by comprising
Receiving module, the signaling of the information for receiving carrying second pilot density from base station, second pilot tone
Density is to be adjusted to obtain to corresponding first pilot density of the first demodulated reference signal DMRS, according to the first DMRS
What network configuration cases determined；
Generation module, for obtaining the 2nd DMRS based on second pilot density.
13. device according to claim 12, which is characterized in that it further include sending module,
The sending module, for sending feedback information to base station.
14. device according to claim 12, which is characterized in that
Second pilot density be according to feedback information to corresponding first pilot density of the first demodulated reference signal DMRS into
Row is adjusted and is obtained.
15. 2~14 described in any item devices according to claim 1, which is characterized in that the receiving module, which is also used to receive, to be come
From the signaling of the resource impact scheme of carrying the 2nd DMRS of base station, the resource impact scheme of the 2nd DMRS is basis
What second pilot density determined.
16. 2~15 described in any item devices according to claim 1, which is characterized in that
The receiving module is also used to receive the pilot frequency port mapping scheme information of carrying the 2nd DMRS from base station
Signaling, the pilot frequency port mapping scheme of the 2nd DMRS are determined according to second pilot density.
17. 2~16 described in any item devices according to claim 1, which is characterized in that the receiving module is specifically via physics
Down control channel, Physical Broadcast Channel or high-level signaling mode receive the letter of carrying second pilot density from base station
The signaling of breath.
18. 2~17 described in any item devices according to claim 1, which is characterized in that it further include estimation module,
The estimation module, for carrying out channel estimation according to the 2nd DMRS.
19. a kind of communication device, comprising:
Receiving module, for receiving the relevant information of the DMRS from base station, the relevant information of the DMRS is used to indicate pilot tone
At least one of density, resource impact scheme, pilot frequency port mapping scheme；
Generation module obtains DMRS for the relevant information based on the DMRS.
20. device according to claim 19, which is characterized in that described device further include:
Sending module, for sending feedback information to base station.
21. device according to claim 20, which is characterized in that
The relevant information of the DMRS is determined according to the feedback information.
22. any device of 9-21 according to claim 1, which is characterized in that
The receiving module, for receiving and coming from via Physical Downlink Control Channel, Physical Broadcast Channel or high-level signaling mode
The relevant information of the DMRS of base station.
23. a kind of communication device characterized by comprising processor and memory, the memory storage execute instruction, when
It when the communication device is run, communicates between the processor and the memory, is executed instruction described in the processor execution
So that the communication device executes device as claimed in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910685389.0A CN110401520B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/077161 WO2015168940A1 (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
| CN201480078083.4A CN106233766B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
| CN201910685389.0A CN110401520B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
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| CN201480078083.4A Division CN106233766B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
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| CN201910685426.8A Active CN110460417B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
| CN201910685389.0A Active CN110401520B (en) | 2014-05-09 | 2014-05-09 | Demodulation reference signal configuration method and device, base station and user equipment |
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| CN111669263A (en) * | 2020-05-19 | 2020-09-15 | 武汉领芯智能科技有限公司 | DMRS (demodulation reference signal) configuration method, device and terminal in 5G communication |
| CN114696971A (en) * | 2020-12-25 | 2022-07-01 | 维沃移动通信有限公司 | Pilot frequency transmission method, device, equipment and storage medium |
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| WO2017166248A1 (en) * | 2016-03-31 | 2017-10-05 | Lenovo Innovations Limited (Hong Kong) | Triggering transmissions using location information |
| CN112600658B (en) | 2016-07-28 | 2022-11-04 | Oppo广东移动通信有限公司 | Method for transmitting pilot signal, terminal equipment and network side equipment |
| WO2018058555A1 (en) | 2016-09-30 | 2018-04-05 | Qualcomm Incorporated | Comb adaptation for interlaced fdm dmrs |
| CN108282275B (en) * | 2017-01-06 | 2021-09-14 | 华为技术有限公司 | Data transmission method and device |
| US10897287B2 (en) * | 2017-05-15 | 2021-01-19 | Futurewei Technologies, Inc. | System and method for spatial quasi-co-location (SQCL) similar angle precoding (SAP) |
| WO2019047090A1 (en) * | 2017-09-07 | 2019-03-14 | 南通朗恒通信技术有限公司 | Method and apparatus for wireless communication in user device and base station |
| CN110890948B (en) * | 2018-09-07 | 2023-03-31 | 中国移动通信有限公司研究院 | Transmission method of demodulation reference signal, network side equipment and user equipment |
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Also Published As
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| CN106233766A (en) | 2016-12-14 |
| CN106233766B (en) | 2021-02-23 |
| CN110401520B (en) | 2020-10-16 |
| CN110460417A (en) | 2019-11-15 |
| WO2015168940A1 (en) | 2015-11-12 |
| CN110460417B (en) | 2020-10-27 |
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