CN106817209B - For implementing the method and device thereof of downlink transfer in millimeter-wave systems - Google Patents
For implementing the method and device thereof of downlink transfer in millimeter-wave systems Download PDFInfo
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- CN106817209B CN106817209B CN201510862211.0A CN201510862211A CN106817209B CN 106817209 B CN106817209 B CN 106817209B CN 201510862211 A CN201510862211 A CN 201510862211A CN 106817209 B CN106817209 B CN 106817209B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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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Abstract
Embodiment of the disclosure discloses a kind of method and device thereof for being used to implement downlink transfer in the base station end of millimeter-wave systems, this method comprises: determining downlink reference signal for each user terminal；One is distributed for implementing the port of downlink transfer for the downlink reference signal of each user terminal；Downlink reference signal corresponding to each port is mapped at least one resource element；Corresponding downlink reference signal is sent at least one described resource element.A kind of method and device thereof for being used to implement downlink transfer in the user terminal of millimeter-wave systems are also disclosed in embodiment of the disclosure, this method comprises: obtaining downlink reference signal from least one resource element in resource subregion；Physical Downlink Control Channel and/or physical down data channel are demodulated with the downlink reference signal.
Description
Technical field
Embodiment of the disclosure is related to wireless communication field, and in particular, to one kind is in millimeter-wave systems for implementing
The method and device thereof of downlink transfer.
Background technique
The target of 5G physical layer is to provide preferable property on data transfer rate and delay in the case where reducing cost and power consumption
Energy.In order to reach next-generation mobile cellular communication standard gigabits/second data rate request, it is a kind of selection be using milli
Available bandwidth in meter wave frequency band.In millimeter wave frequency band, there are some unfavorable propagation characteristics in wireless channel for work, including
Strong path loss, atmosphere and rainwater absorb, and the low diffraction and obstacle around roadblock penetrate.
For the propagation characteristic for overcoming these unfavorable, an important skill that big array and narrow beam are transmitted as data
Art.However, under millimeter wave channel circumstance, the side of the transmission about down control channel and the channel measurement for data channel
Case is still blank.In 4G LTE/LTE-A, implement channel measurement and demodulation physical down control based on non-precoded CRS
Channel (PDCCH) processed, however LTE is reused in millimeter-wave systems due to the characteristic of the above millimeter wave channel for millimeter wave
The transmission plan of control channel is unable to satisfy the requirement of signal-to-noise ratio and signal covering.
Therefore, in the present invention, we are based on being used for the broadband of down control channel or narrow in millimeter-wave communication system
The characteristics of band user's DRS (Dedicated Reference Signal), recommend several new transmission plans.Furthermore we prefer that scheme be not limited only to downlink
The transmission of control channel, based on the beam forming for using same wideband or narrowband data transmission can also by it is proposed that side
Case is supported.This simplifies the designs of reference signal for this programme, and save the signaling overheads of reference signal.It is examined for concise
Consider, in invention later is introduced, we mainly introduce the transmission of down control channel, with existing LET/LTE-A downlink control
The transmission of channel processed is compared, and the transmission of control channel influences bigger.
Summary of the invention
For this purpose, the first aspect of the disclosure provide it is a kind of in the base station end of millimeter-wave systems for implementing downlink transfer
Method, comprising: determine downlink reference signal for each user terminal；A use is distributed for the downlink reference signal of each user terminal
In the port for implementing downlink transfer；Downlink reference signal corresponding to each port is mapped at least one resource element；
Corresponding downlink reference signal is sent at least one described resource element.
In one embodiment, downlink reference signal corresponding to each port is mapped at least one resource element
The step of specifically include: downlink reference signal corresponding to the first quantity port is respectively mapped to first quantity and is provided
On source element.
In one embodiment, downlink reference signal corresponding to each port is mapped at least one resource element
The step of specifically include: downlink reference signal corresponding to the first quantity port is combined, and maps to described
On one quantity resource element, wherein downlink reference signal corresponding to first quantity port passes through orthogonal covering code
To prevent the interference between downlink reference signal.
In one embodiment, downlink reference signal corresponding to each port is mapped at least one resource element
The step of specifically include: based on power limit, determine that a resource element can be supported the maximum quantity of downlink reference signal；
Downlink reference signal corresponding to second quantity port maps on a resource element, wherein second quantity be less than etc.
In the maximum quantity.
In one embodiment, the type of the downlink reference signal is broadband user's DRS (Dedicated Reference Signal).
In one embodiment, the type of the downlink reference signal is narrow-band user DRS (Dedicated Reference Signal).
In one embodiment, when the base station need after subframe in the first user terminal send physical down control
When at least one in channel processed, physical down data channel, a position is sent to first user terminal in current subframe
Instruction information is set, in subframe later, to control for demodulating the physical down for indicating to first user terminal
The position of at least one resource element corresponding to the downlink reference signal of at least one of channel, physical down data channel
It sets and the position of resource subregion；Physical Downlink Control Channel, the physical down of subframe after described in being wherein used to send
The resource element of at least one of data channel is located in the resource subregion；When the base station do not need after son
When sending Physical Downlink Control Channel, at least one in physical down data channel to the first user terminal in frame, in current son
A removing, which is sent, to first user terminal in frame indicates information.Range (that is: the current subframe of subframe after described in wherein
Which subframe later), it can be by loading the control signaling informing user terminal of the position indication information or passing through physics
Layer signaling or high-level signaling are informed in advance to user terminal.
In one embodiment, when current subframe be base station end it is first or after break or lose in the data transmission for the first time to
When first user terminal sends Physical Downlink Control Channel, at least one in physical down data channel, with first user
At least one corresponding resource element of the port at end is allocated in shared resource subregion；Wherein, the shared resource
Position of the subregion in resource block is preset, and is present in given sub-frame.
In one embodiment, described to share when the downlink reference signal is used to demodulate Physical Downlink Control Channel
Resource subregion in include resource element for sending the Physical Downlink Control Channel；When the downlink reference signal is used
It include for sending in the shared resource subregion when demodulating Physical Downlink Control Channel and physical down data channel
The resource element of the Physical Downlink Control Channel and resource element for sending the physical down data channel；Wherein,
The downlink reference signal in the shared resource subregion is that user is dedicated or the non-wave beam forming of cell-specific
Or wave beam forming.
In one embodiment, when confirming that Physical Downlink Control Channel is lost, base station retransmits the position indication information.
Wherein, by receiving the NACK signaling of user terminal, or it is overtime based on transmission generation, to confirm that Physical Downlink Control Channel is lost
It loses.
The second aspect of the disclosure provides a kind of side for being used to implement downlink transfer in the user terminal of millimeter-wave systems
Method, comprising: obtain downlink reference signal from least one resource element in resource subregion；With the downlink reference signal
Demodulate Physical Downlink Control Channel and/or physical down data channel.
In one embodiment, the step of downlink reference signal is obtained from least one resource element in resource subregion
Suddenly it specifically includes: for the first time to the user terminal after current subframe is first base station end or disconnected in the data transmission or loss
When sending Physical Downlink Control Channel, at least one in physical down data channel: by blind examination, from shared resource sub-district
The downlink reference signal of the corresponding user terminal is obtained at least one resource element in domain；Wherein, the shared resource
Position of the subregion in the resource block is fixed；Or it is obtained in current subframe from the broadcast singal of the base station end
The location information of resource element corresponding to downlink reference signal obtains the descending reference letter of current subframe based on the location information
Number.
In one embodiment, position indication information is received in current subframe, the position indication information is used to indicate,
In subframe later, for demodulating under at least one of the Physical Downlink Control Channel, physical down data channel
The position of at least one resource element corresponding to row reference signal and the position of resource subregion；Wherein for send it is described it
The resource element of at least one of the Physical Downlink Control Channel of subframe afterwards, physical down data channel is located at the resource
In subregion.
In one embodiment, it when receiving position indication information failure in current subframe, is sent to base station end
NACK signaling, to be not properly received the position indication information to base station end instruction；And/or in current subframe
When receiving position indication information success, ACK signaling is sent to base station end, to have correctly received institute to base station end instruction
State position indication information.
In one embodiment, the position indication information is implemented to encode by the coding mode of strong robustness, to protect
Demonstrate,proving the position indication information can correctly be transmitted with particular probability.
The third aspect of the disclosure provides a kind of dress for being used to implement downlink transfer in the base station end of millimeter-wave systems
It sets, comprising: determination unit, for determining downlink reference signal for each user terminal；Allocation unit, for for each user terminal
Downlink reference signal distributes one for implementing the port of downlink transfer；Map unit, under corresponding to each port
Row reference signal is mapped at least one resource element；Transmitting unit, for being sent at least one described resource element
Corresponding downlink reference signal.
The fourth aspect of the disclosure provides a kind of dress for being used to implement downlink transfer in the user terminal of millimeter-wave systems
It sets, comprising: receiving unit, for obtaining downlink reference signal from least one resource element in resource subregion；Demodulation
Unit, for demodulating Physical Downlink Control Channel and/or physical down data channel with the downlink reference signal.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the disclosure is other
Feature, objects and advantages will become more apparent:
Fig. 1 shows the resource of broadband user's DRS (Dedicated Reference Signal) of the control channel of one embodiment according to the disclosure
Elemental partition schematic diagram；
Fig. 2 shows the resources according to the narrow-band user DRS (Dedicated Reference Signal) of the control channel of one embodiment of the disclosure
Elemental partition schematic diagram；
Fig. 3 shows the money of the narrow-band user DRS (Dedicated Reference Signal) of control channel according to another embodiment of the present disclosure
Source element distributes schematic diagram；
Under Fig. 4 is shown according to one embodiment of the disclosure in the base station end of micron millimeter-wave systems for implementing
The method flow diagram of row transmission；
Under Fig. 5 is shown according to one embodiment of the disclosure in the user terminal of micron millimeter-wave systems for implementing
The method flow diagram of row transmission；
Under Fig. 6 is shown according to one embodiment of the disclosure in the base station end of micron millimeter-wave systems for implementing
The apparatus module figure of row transmission；And
Under Fig. 7 is shown according to one embodiment of the disclosure in the user terminal of micron millimeter-wave systems for implementing
The apparatus module figure of row transmission.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of disclosure a part.Institute
The specific embodiment that can be realized the disclosure has been illustrated by way of example in attached attached drawing.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the disclosure.It is appreciated that can use other under the premise of without departing from the scope of the present disclosure
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
Scope of disclosure is defined by the claims appended hereto.In addition, although the step of method is described in specification in a particular order
Suddenly, but this does not require that or implies must execute these operations in this particular order, or have to carry out whole institutes
The operation shown just is able to achieve desired as a result, on the contrary, the step of describing can change and execute sequence.Additionally or alternatively, may be used
To omit certain steps, multiple steps are merged into a step and are executed, and/or a step is decomposed into multiple steps and is held
Row.
We combine Fig. 1-3 simply to introduce inventive concept of the invention first.Fig. 1-3 respectively illustrates resource area
Schematic diagram, the horizontal axis in the region indicates time domain, and the longitudinal axis indicates frequency, can be used for implementing downlink wherein each grid is one
The resource element of transmission.
In the present invention, we prefer that following two is used for the dedicated ginseng of user of down control channel and downstream data channel
Examine the design of signal: 1. broadband user's DRS (Dedicated Reference Signal)s, 2. narrow-band user DRS (Dedicated Reference Signal)s.
It, can be by up channel measurement and in advance based on the intercommunity of downstream transmission channel in the two schemes
Result is estimated to calculate the precoding of downlink reference signal.Therefore we prefer that scheme be mainly used in time division multiplex system.Such as
Mentioned by many technical papers or report, time division multiplexing has many advantages millimeter-wave systems.It is discussed in past 5G
In meeting, most companies includes that Huawei, Nokia etc. all have agreed to and agree: at least being disposed in millimeter-wave systems
First stage, time division multiplexing is preferential for millimeter-wave systems.Uplink channel estimation based on the detecting to uplink reference signals,
For example, the interception reference signal in LTE system.Before Physical Downlink Control Channel is decoded, it can simply implement uplink and detect
Listen the original allocation of the resource of reference signal and circular shift information.Then the re-optimization after decoding Physical Downlink Control Channel
Configuration.
1. the transmission plan of broadband user's DRS (Dedicated Reference Signal)
From the name of broadband user's DRS (Dedicated Reference Signal) it is found that these reference signals are covered on entire frequency band.For with
The port at family end, beam-forming weights are identical in entire wave band.Downlink reference signal after beam forming can be mapped
Into different resource element.For example, a port, which distributes a resource element or multiple downlink reference signals, to be mapped to
It (however due to power limit, is allowed to pass in a resource element in the resource element of one implementable more reference signal transmission
The quantity of defeated downlink reference signal should be also properly restrained).In addition, for user terminal, in Physical Downlink Control Channel quilt
Before decoding, the assigned port number of user terminal and user terminal, which are configured to the information such as which port and should inform, gives the user
End.
As shown in Figure 1, by different beamforming vectors, Physical Downlink Control Channel and insertion to different user end
Downlink reference signal implement precoding.We these reference signal after being pre-coded is referred to as user's DRS (Dedicated Reference Signal).With
The advantages of family DRS (Dedicated Reference Signal), is that the power for sending reference signal is more concentrated, the interference to the reference signal at other users end
It is smaller.
There is shown herein the distribution of the resource element of three kinds of broadband user's DRS (Dedicated Reference Signal)s (or mapping) schemes.
A) in a kind of mode, a specific resource element can be distributed for the downlink reference signal after each precoding
To carry out downlink transfer.
It b) in a further mode of operation, can be the downlink reference signal after each precoding as shown in Fig. 1 (left part)
The resource of a resource element size is distributed, multiple downlink reference signals are combined, then usually by multiple resource elements
Transmit the multiple downlink reference signals combined, wherein by just between the multiple downlink reference signals combined
Overlay code (OCC) is handed over to eliminate the interference between corresponding ports.Due to distributing a resource element for each downlink reference signal
The resource of size, it may be assumed that it is equivalent to each downlink reference signal and occupies a resource element, therefore, compared with first way, under
Row reference signal implements transmission again after combining can obtain the average value that downlink reference signal measures on multiple resources.
C) in a further mode of operation, as shown in Fig. 1 (right part), multiple downlink reference signals can be in the same resource
It is sent in a manner of spatial reuse in element.Due in identical resource element, downlink reference signal after precoding it
Between be it is mutually orthogonal, therefore each user terminal can correctly from the resource element receive be directed toward their own reference believe
Number.In this approach, resource element can support that the quantity of downlink reference signal is limited by power requirement.
In these modes, the facilities of the port for distributing to each user terminal, base station can be in access procedure
Middle notice is to each user terminal, later if desired, the setting can be modified, and notifies to each user terminal.
In transmission, downlink reference signal implements transmission using the resource element being individually assigned to.
2. the transmission plan of narrow-band user DRS (Dedicated Reference Signal)
For narrowband systems, Physical Downlink Control Channel and physical down data channel can pass through different descending references
Signal demodulates, and can also be demodulated by identical downlink reference signal.Therefore, for both of these case, narrow-band user is special
There is two ways with the transmission plan of reference signal.
1) in a kind of mode, as shown in Fig. 2, Physical Downlink Control Channel and physical down data channel pass through difference
Downlink reference signal demodulate.The Physical Downlink Control Channel of subframe and the descending reference for demodulating the Physical Downlink Control Channel
Signal is arranged in a resource subregion.In user terminal and the first access procedure of base station end, different user end/user
Group Physical Downlink Control Channel corresponding to position of the resource element in resource area can notify in the following manner to
Each user terminal: 1. pass through broadcast system information；2. a public resource subregion is set, so that each user terminal is in the son
The respective downlink reference signal of blind examination in region, the region can be fixed resource block either center resources block, this is public
Resource subregion in given sub-frame, which can be each subframe, be also possible to by predetermined configurations or given
The selected subframe of time domain sequence, for example, first subframe in even subframe or every 5 subframes.The reference signal in the region can
To be: user is dedicated or the non-wave beam forming of cell-specific or wave beam forming, wherein the proprietary non-wave beam forming of cell
Reference signal be most viable.
After obtaining initial resource sub-district domain information, user terminal can be found respectively each user terminal in this region
Control signaling.Wherein, if base station also needs to send Physical Downlink Control Channel to user terminal in subframe later,
After also having in control signaling in current subframe subframe (such as: next subframe or under several subframes) physical down
The location information of resource subregion where control channel and corresponding downlink reference signal.It is wrapped in resource sub-window position information
Include the starting point and size of resource subregion.If base station does not need to send physical down control to user terminal in subframe later
Channel processed, then have removings an instruction information in control signaling in current subframe, to indicate that base station will not be later
Physical Downlink Control Channel is sent to the user terminal in subframe.The range of subframe after described in wherein is (that is: after current subframe
Which subframe), can inform user terminal or by physical layer letter by loading the control signaling of the position indication information
It enables or high-level signaling is informed in advance to user terminal.
In this approach, the mode of downlink reference signal distribution resource element can be in broadband user's DRS (Dedicated Reference Signal)
Any one of three kinds of modes introduced, it may be assumed that each downlink reference signal is believed using a resource element, multiple descending references
Number a resource element is used using multiple resource elements or multiple downlink reference signals.
2) in a further mode of operation, as shown in figure 3, Physical Downlink Control Channel and physical down data channel pass through it is identical
Downlink reference signal demodulate.Physical Downlink Control Channel, the physical down data channel of subframe, and demodulate the physics
The downlink reference signal of down control channel and physical down data channel is arranged in a resource subregion.In user terminal
In the first access procedure of base station end, different user end/user group Physical Downlink Control Channel and physical down data letter
Position of the resource element corresponding to road in resource area can be notified in the following manner to each user terminal: 1. by wide
Broadcast system information；2. a public resource subregion is set, it, should for each respective downlink reference signal of user terminal blind examination
Region can be fixed resource block either center resources block.For the public resource subregion in given sub-frame, this is specified
Subframe can be each subframe, be also possible to the subframe selected by predetermined configurations or given time domain sequence, for example, even number is sub
First subframe in frame or every 5 subframes.The reference signal in the region may is that user is dedicated or cell-specific
Non- wave beam forming or wave beam forming, wherein the reference signal of the proprietary non-wave beam forming of cell is most viable.
After obtaining initial resource sub-district domain information, user terminal can be found respectively each user terminal in this region
Control signaling or downlink data.Wherein, if base station also needs to send physical down control to user terminal in subframe later
Channel and/or physical down data channel processed, then the son after having in control signaling or downlink data in current subframe
Resource subregion where the Physical Downlink Control Channel and/or physical down data channel of frame and corresponding downlink reference signal
Location information.It include the starting point and size of resource subregion in resource sub-window position information.If base station does not need
Physical Downlink Control Channel and/or physical down data channel are sent to user terminal in subframe later, then in current subframe
Control signaling in there is removings to indicate information, to indicate that base station will not be in subframe later to user terminal transmission object
Manage down control channel and/or physical down data channel.
Equally, in this approach, the mode of downlink reference signal distribution resource element can be broadband user's dedicated reference
Any one of three kinds of modes described in signal, it may be assumed that each downlink reference signal uses a resource element, multiple downlinks
Reference signal uses a resource element using multiple resource elements or multiple downlink reference signals.
Conceived based on foregoing invention, method flow and device of the invention will be discussed in detail in we in conjunction with Fig. 4-7 below.
Firstly, as shown in figs. 4 and 6, we introduce in base station end for implementing the method and device thereof of downlink transfer.In
It is used to implement the device 600 of downlink transfer in the base station end of millimeter-wave systems to include: the first receiving unit 601, determination unit
602, allocation unit 603, map unit 604, the first transmission unit 605.Each unit in the device 600 can be respectively by reality
The hardware module and/or logic circuit of existing corresponding function are constituted, wherein the connection relationship between unit is as shown in Figure 6.
In step S401, base station is that each user terminal determines downlink reference signal.
Specifically, when base station will send Physical Downlink Control Channel and/or physical down data channel to user terminal, the
One receiving unit 601 receives the uplink reference signals of each user terminal and is sent in determination unit 602.Determination unit 602 is right
The uplink reference signals of each user terminal measure analysis, and the intercommunity based on downstream transmission channel, are tied according to analysis
Fruit calculates the precoding of the downlink reference signal of each user terminal, to determine final descending reference letter for each user terminal
Number.Wherein, the type of the downlink reference signal can be broadband user's DRS (Dedicated Reference Signal) or narrow-band user dedicated reference
Signal.Broadband user's DRS (Dedicated Reference Signal) refers to that reference signal is transmitted on Whole frequency band and (that is: is just passed at interval of a frequency range
It is defeated) user's DRS (Dedicated Reference Signal).And narrow-band user DRS (Dedicated Reference Signal) refers to that reference signal is passed in specific resources region
Defeated user's DRS (Dedicated Reference Signal)
In step S402, base station is that the downlink reference signal of each user terminal distributes one for implementing downlink transfer
Port.
Specifically, allocation unit 603 is that each user terminal distributes a specific port, each port includes multiple days
Line.Base station end sends downlink data or signaling to corresponding user terminal using the mutiple antennas of the port.
In step S403, downlink reference signal corresponding to each port is mapped at least one resource element by base station
On.
Specifically, the downlink reference signal of user terminal needs usually to be sent to user terminal, map unit 604 using resource element
Downlink reference signal corresponding to each port (that is, each user terminal) is mapped at least one resource element, to make
Obtaining each port can use corresponding resource element transmission downlink reference signal.Need to confirm in mapping process mapping mode and
Mapping position, concrete scheme are as follows:
1. specific mapping mode has following three kinds:
1) downlink reference signal corresponding to the first quantity port is respectively mapped to the first quantity resource element
On element.If there is the downlink reference signal of 4 ports needs to transmit, then the downlink reference signal of each port occupies a money
Source element.
2) downlink reference signal corresponding to the first quantity port is combined, and maps to first quantity
On a resource element, wherein downlink reference signal corresponding to first quantity port is prevented by orthogonal covering code
Interference between downlink reference signal.Referring to Fig. 1 (left part), for example, the downlink reference signal if there is 4 ports needs
Transmission forms this 4 downlink reference signals the signal of one occupancy, 4 resource elements, wherein the descending reference letter of 4 ports
Using orthogonal covering code to prevent mutual interference between number.
3) downlink reference signal corresponding to the second quantity port is mapped on a resource element.It is (right referring to Fig. 1
Side section), by the quantity for the downlink reference signal that can be sent simultaneously on each resource element be by power limit,
The quantity of downstream parameter signal on resource element is no more than the maximum quantity that it can bear.
2. since downlink reference signal be used to demodulate Physical Downlink Control Channel and/or demodulation physical down data letter
Road.Therefore, in order to guarantee the validity demodulated, downlink reference signal mapped resource element must be controlled with physical down to be believed
Road and/or physical down data channel mapped resource element are in same resource subregion.
3. being pointed out that when downlink reference signal is narrow-band user DRS (Dedicated Reference Signal), due in each subframe
In, the position of the resource subregion where downlink reference signal and Physical Downlink Control Channel and/or physical down data channel
It is unfixed.Therefore, for narrow-band user DRS (Dedicated Reference Signal), resource subregion where the resource element of mapping
Position needs to be notified to user terminal.
In one embodiment, as shown in Fig. 2, when downlink reference signal is narrow-band user DRS (Dedicated Reference Signal), and under
When row reference signal is used for the case where demodulating Physical Downlink Control Channel:
Base station sends Physical Downlink Control Channel to user terminal for the first time after breaking or losing for the first time or in the data transmission
When, the downlink reference signal for demodulating the Physical Downlink Control Channel is mapped to resource element in public resource subregion
On.Then base station can inform the position of the user terminal resource element by broadcast message, or inform in advance the user terminal public affairs
The position of total resource subregion, to allow user terminal, blind examination goes out the downlink reference signal in this region.
Furthermore when base station needs to send Physical Downlink Control Channel to user terminal in subframe later, in current subframe
In, base station sends a position indication information to the user terminal, in subframe later, to use for indicating to the user terminal
The position of at least one resource element corresponding to the downlink reference signal for demodulating the Physical Downlink Control Channel and should
The position of resource subregion where downlink reference signal；The physical down control letter of subframe after described in being wherein used to send
The resource element in road also is located in the resource subregion.
When base station does not need to send Physical Downlink Control Channel to user terminal in subframe later, in current subframe
A removing is sent to the user terminal and indicates information, and physical down will not be sent to the user terminal in subframe later with instruction
Control channel.
In one embodiment, as shown in figure 3, when downlink reference signal is narrow-band user DRS (Dedicated Reference Signal), and under
When row reference signal be used to demodulate the case where Physical Downlink Control Channel and physical down data channel:
Base station sends Physical Downlink Control Channel to user terminal for the first time after breaking or losing for the first time or in the data transmission
When with physical down data channel, the downlink reference signal quilt of the Physical Downlink Control Channel and physical down data channel is demodulated
It maps on the resource element in public resource subregion.Then base station can inform the user terminal resource by broadcast message
The position of element, or inform in advance the position of the user terminal public resource subregion, thus allow user terminal in this region
Blind examination goes out the downlink reference signal.
Furthermore when base station need after subframe in user terminal send Physical Downlink Control Channel and physical down number
It is believed that in current subframe, base station sends a position indication information to the user terminal, for referring to the user terminal when road
Show, in subframe later, the descending reference for demodulating the Physical Downlink Control Channel and physical down data channel is believed
The position of resource subregion where the position of at least one resource element corresponding to number and the downlink reference signal；Wherein
For send it is described after the Physical Downlink Control Channel of subframe and the resource element of physical down data channel also be located at institute
It states in resource subregion.When base station do not need after subframe in user terminal send Physical Downlink Control Channel, under physics
When row data channel, a removing is sent to the user terminal in current subframe and indicates information, it will not be in son later with instruction
Physical Downlink Control Channel, physical down data channel are sent to the user terminal in frame.
In step s 404, base station is sent and is provided at least one described resource element by the first transmission unit 605
The corresponding downlink reference signal of source element.
Hereinafter, as shown in Fig. 5 and Fig. 7, we introduce in user terminal for implementing the method and device thereof of downlink transfer.In milli
Device 700 in the base station end of metric wave system for implementing downlink transfer include: the second receiving unit 701, demodulating unit 702,
Acknowledgement unit 703, the second transmission unit 704.Each unit in the device 700 can be respectively by the hardware of realization corresponding function
Module and/or logic circuit are constituted, wherein the connection relationship between unit is as shown in Figure 7.
In step S501, user terminal passes through the second receiving unit 701 from least one resource element in resource subregion
Downlink reference signal is obtained on element.
Specifically, for the first time to the user after current subframe is first base station end or disconnected in the data transmission or loss
When end sends Physical Downlink Control Channel, at least one in physical down data channel: 1) user terminal is by blind examination, from sharing
Resource subregion at least one resource element on obtain the downlink reference signal of the corresponding user terminal；Wherein, described
Position of the shared resource subregion in the resource block is fixed and is informed in advance to user terminal；Or 2) from institute
The location information for obtaining resource element corresponding to downlink reference signal in current subframe in the broadcast singal of base station end is stated, is based on
The downlink reference signal of location information acquisition current subframe.
If current subframe is not that base station end is first or disconnected in the data transmission or loss is later for the first time to the user terminal
When sending Physical Downlink Control Channel, at least one in physical down data channel: obtaining position in previous subframe and refer to
Show information, the position indication information is used to indicate, in current subframe, for demodulating the Physical Downlink Control Channel, object
Manage position and the resource of at least one resource element corresponding to the downlink reference signal of at least one of downstream data channel
The position of subregion.
In step S502, demodulating unit 702 demodulates Physical Downlink Control Channel and/or object with the downlink reference signal
Manage downstream data channel.
In addition, if further including step S503 when receiving position indication information failure in current subframe.In step
In S503, NACK signaling is sent to base station end, to be not properly received the position indication information to base station end instruction.
It further include step S503 ' when receiving position indication information success in current subframe.In step S503 ', Xiang Ji
Stand end send ACK signaling, with to the base station end instruction have correctly received the position indication information
Although the exemplary device 600 and device 700 are illustrated in figs. 6 and 7, the one of the explanation of Fig. 6 and 7
A or multiple units can be merged, separate, rearrange, omit, remove and/or be implemented in any way.Further,
Exemplary each unit can be realized by any combination of hardware, software, firmware and/or hardware, software and/or firmware.More
Normally, any one of exemplary said units can be by one or more circuits, programmable processor, dedicated integrated
Circuit (ASIC), programmable logic device (PLD) and/or field programmable logic device (FPLD) etc. are realized.
It is obvious to a person skilled in the art that the present disclosure is not limited to the details of above-mentioned exemplary embodiment, Er Qie
Without departing substantially from the disclosure spirit or essential attributes in the case where, can realize embodiment of the disclosure in other specific forms.
Therefore, in any case, the present embodiments are to be considered as illustrative and not restrictive.In addition, it will be evident that " packet
Include " word is not excluded for other elements and steps, and wording "one" be not excluded for plural number.That states in device claim is multiple
Element also can be implemented by one element.The first, the second equal words are used to indicate names, and are not offered as any specific suitable
Sequence.
Claims (12)
1. a kind of method for being used to implement downlink transfer in the base station end of millimeter-wave systems, comprising:
Downlink reference signal is determined for each user terminal；
One is distributed for implementing the port of downlink transfer for the downlink reference signal of each user terminal；
Downlink reference signal corresponding to each port is mapped at least one resource element；
Corresponding downlink reference signal is sent at least one described resource element；
Wherein the step that downlink reference signal corresponding to each port is mapped at least one resource element is specifically included:
Downlink reference signal corresponding to first quantity port is combined, and maps to the first quantity resource element
On, wherein downlink reference signal corresponding to first quantity port prevents descending reference from believing by orthogonal covering code
Interference between number；Or
Based on power limit, determine that a resource element can be supported the maximum quantity of downlink reference signal；The second quantity
Downlink reference signal corresponding to port maps on a resource element, wherein second quantity is less than or equal to the maximum
Quantity.
2. according to the method described in claim 1, wherein the type of the downlink reference signal is broadband user's dedicated reference letter
Number.
3. according to the method described in claim 1, wherein the type of the downlink reference signal is narrow-band user dedicated reference letter
Number.
4. according to the method described in claim 3, wherein further include,
When the base station need after subframe in the first user terminal send Physical Downlink Control Channel, physical down data
When at least one in channel, send a position indication information to first user terminal in current subframe, with for
The first user terminal instruction, in subframe later, for demodulating the Physical Downlink Control Channel, physical down data letter
The position of at least one resource element corresponding to the downlink reference signal at least one of road and the position of resource subregion
It sets；Wherein for send it is described after the Physical Downlink Control Channel of subframe, at least one of physical down data channel
Resource element be located in the resource subregion；
When the base station do not need after subframe in the first user terminal send Physical Downlink Control Channel, physical down number
It is believed that sending removings an instruction information to first user terminal in current subframe when at least one in road；
The range of subframe after wherein described, the control signaling by loading the position indication information inform user terminal or
Person is informed in advance by physical layer signaling or high-level signaling to user terminal.
5. according to the method described in claim 3, wherein further including
Physics is sent to the first user terminal for the first time after current subframe is first base station end or disconnected in the data transmission or loss
When at least one in down control channel, physical down data channel, it is corresponding with the port of first user terminal extremely
A few resource element is allocated in shared resource subregion；
Wherein, position of the shared resource subregion in resource block is preset, and is present in given sub-frame.
6. according to the method described in claim 5, wherein
When the downlink reference signal is for when demodulating Physical Downlink Control Channel, including using in the shared resource subregion
In the resource element for sending the Physical Downlink Control Channel；
It is described shared when the downlink reference signal is used to demodulate Physical Downlink Control Channel and physical down data channel
It include resource element for sending the Physical Downlink Control Channel and for sending the physical down in resource subregion
The resource element of data channel；
Wherein, the downlink reference signal in the shared resource subregion is that user is dedicated or cell-specific
Non- wave beam forming or wave beam forming.
7. a kind of method for being used to implement downlink transfer in the user terminal of millimeter-wave systems, comprising:
Downlink reference signal is obtained from least one resource element in resource subregion；
Physical Downlink Control Channel and/or physical down data channel are demodulated with the downlink reference signal；
The step of downlink reference signal is wherein obtained from least one resource element in resource subregion specifically includes: when working as
Preceding subframe is that base station end is first or disconnected in the data transmission or loss sends physical down control to the user terminal for the first time later
When at least one in channel, physical down data channel:
By blind examination, the downlink of the corresponding user terminal is obtained from least one resource element in shared resource subregion
Reference signal；Wherein, position of the shared resource subregion in the resource block is fixed；Or
From the position for obtaining resource element corresponding to downlink reference signal in current subframe in the broadcast singal of the base station end
Information obtains the downlink reference signal of current subframe based on the location information.
8. according to the method described in claim 7, further include:
Position indication information is received in current subframe, the position indication information is used to indicate, and in subframe later, is used for
It demodulates corresponding to the downlink reference signal of at least one of the Physical Downlink Control Channel, physical down data channel extremely
The position of a few resource element and the position of resource subregion；The physical down control of subframe after described in being wherein used to send
The resource element of at least one of channel processed, physical down data channel is located in the resource subregion.
9. according to the method described in claim 8, further include:
When receiving position indication information failure in current subframe, NACK signaling is sent to base station end, with to the base
End instruction of standing is not properly received the position indication information；And/or
When receiving position indication information success in current subframe, ACK signaling is sent to base station end, with to the base station
End instruction has correctly received the position indication information.
10. according to the method described in claim 8, further include:
The position indication information is implemented to encode by the coding mode of strong robustness, to guarantee the position indication information energy
It is correctly transmitted with particular probability.
11. a kind of device for being used to implement downlink transfer in the base station end of millimeter-wave systems, comprising:
Determination unit, for determining downlink reference signal for each user terminal；
Allocation unit distributes one for implementing the port of downlink transfer for the downlink reference signal for each user terminal；
Map unit, for downlink reference signal corresponding to each port to be mapped at least one resource element；
Transmitting unit, for sending corresponding downlink reference signal at least one described resource element；
Wherein the map unit is specifically used for: downlink reference signal corresponding to the first quantity port is combined,
And map on the first quantity resource element, wherein downlink reference signal corresponding to first quantity port is logical
Orthogonal covering code is crossed to prevent the interference between downlink reference signal；Or
Based on power limit, determine that a resource element can be supported the maximum quantity of downlink reference signal；The second quantity
Downlink reference signal corresponding to port maps on a resource element, wherein second quantity is less than or equal to the maximum
Quantity.
12. a kind of device for being used to implement downlink transfer in the user terminal of millimeter-wave systems, comprising:
Receiving unit, for obtaining downlink reference signal from least one resource element in resource subregion；
Demodulating unit, for demodulating Physical Downlink Control Channel and/or physical down data channel with the downlink reference signal；
Wherein the receiving unit is specifically used for after current subframe is first base station end or disconnected in the data transmission or loss
When sending Physical Downlink Control Channel, at least one in physical down data channel to the user terminal for the first time:
By blind examination, the downlink of the corresponding user terminal is obtained from least one resource element in shared resource subregion
Reference signal；Wherein, position of the shared resource subregion in the resource block is fixed；Or
From the position for obtaining resource element corresponding to downlink reference signal in current subframe in the broadcast singal of the base station end
Information obtains the downlink reference signal of current subframe based on the location information.
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| CN103312649A (en) * | 2012-03-16 | 2013-09-18 | 华为终端有限公司 | Method for transmitting descending control signal, base station and user equipment |
| CN103503394A (en) * | 2012-09-14 | 2014-01-08 | 华为终端有限公司 | Method and device for enhancing mapping between downlink control channel resource and antenna port |
| CN104054280A (en) * | 2012-01-18 | 2014-09-17 | Lg电子株式会社 | Method and apparatus for enhanced control channel-based operation in wireless communication system |
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| CN101771444A (en) * | 2009-01-06 | 2010-07-07 | 大唐移动通信设备有限公司 | Method for setting reference signals in multi-antenna system and base station |
| CN104054280A (en) * | 2012-01-18 | 2014-09-17 | Lg电子株式会社 | Method and apparatus for enhanced control channel-based operation in wireless communication system |
| CN103312649A (en) * | 2012-03-16 | 2013-09-18 | 华为终端有限公司 | Method for transmitting descending control signal, base station and user equipment |
| CN103503394A (en) * | 2012-09-14 | 2014-01-08 | 华为终端有限公司 | Method and device for enhancing mapping between downlink control channel resource and antenna port |
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