CN106330789A - Multi-user superposition transmission-based physical multicast channel (PMCH) transmission method and device - Google Patents
Multi-user superposition transmission-based physical multicast channel (PMCH) transmission method and device Download PDFInfo
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Abstract
The present invention discloses a multi-user superposition transmission-based PMCH transmission method and device. The method comprises the steps of using a user equipment (UE) to receive a second reference signal and the second information in a step 1 and to receive a first reference signal and the first information in a step 2; wherein the time frequency resource occupied by the first information and the time frequency resource occupied by the second information are all or partially overlapped, the time frequency resource occupied by the first information and the time frequency resource occupied by the second reference signal are orthogonal, and the time frequency resource occupied by the second information and the time frequency resource occupied by the second reference signal are orthogonal; the time frequency resource occupied by the first reference signal is occupied by the second reference signal, and the second reference signal is an multicast broadcast single frequency network (MBSFN) reference signal (RS). According to the present invention, the interference between the reference signals correlated with the first and second information is reduced, the additional resource elements (RE) are not occupied, and the transmission efficiency is improved.
Description
Technical field
The present invention relates to the transmission plan of multi-casting communication in wireless communication system, particularly relate to pin
To MUST (Multi User Superposition Transmission, multi-user's superposed transmission)
Multicast transmission method and device.
Background technology
Traditional 3GPP (3rd Generation Partner Project, third generation affiliate
Project) in cellular system, the downstream wireless signals of multi-user is by { TDM (Time Division
Multiplexing, time division multiplex), FDM (Frequency Division Multiplexing,
Frequency division multiplexing), CDM (Code Division Multiplexing, code division multiplexing) in one
Plant or various ways realizes.3GPP R (Release, version) 13 introduces one newly
Research topic (RP-150496)-descending MUST, i.e. utilize the different of transmit power to distinguish two
The downstream wireless signals of individual user.Said two user generally includes a nearly user (i.e. distance base
Stand near) and a remote user (i.e. distance base station is remote), base station is the first signal for nearly user
Distribute relatively low transmit power, be that the secondary signal for remote user distributes higher transmission merit simultaneously
Rate.Remote user directly demodulates secondary signal (will the first signal work as noise processed), and closely user
First demodulate secondary signal and (possess lower path loss in view of nearly user user farther out, decoding
Successfully probability is the highest), the interference then removing secondary signal from reception signal is remained
Signal, obtains the first signal to residual signal decoding, here it is SIC (Successive
Interference Cancellation, successive interference cancellation) algorithm.In order to perform SIC, closely
User needs to obtain the first signal and the schedule information-of secondary signal and remote user has only to obtain the
The schedule information of binary signal.
It should be noted that the specific implementation of above-mentioned SIC algorithm is by UE (User
Equipment, subscriber equipment) manufacturer determines voluntarily.And as the replacement of a kind of SIC or benefit
Filling scheme, nearly UE (or remote UE) can use IRC (Interference Rejection
Combining, AF panel merges) algorithm carries out whitening operation to the wireless signal of superposition, with
Improve receptivity.IRC algorithm does not require that UE correct decoding disturbs wireless signal, it is only necessary to estimate
The channel parameter of interference wireless signal.
Two kinds are used for defined in traditional LTE (Long Term Evolution, Long Term Evolution)
The physical layer channel of transmission data, i.e. PDSCH (Physical Downlink Shared Channel,
Physical Downlink Control Channel) PMCH (Physical Multicast Channel, believe by physical multicast
Road).The former is mainly used in the transmission of mode of unicast, and the latter is mainly used in the transmission of multicast.
The transmission channel that PMCH maps is MCH (Multicast Channel, Multicast Channel).At 3GPP
In RAN1#81 meeting, some companies propose two PMCH being applied to MUST be overlapped mutually
Between.
Summary of the invention
Inventor is found by research, when MUST is applied to a PMCH and two PMCH,
One typical application scenarios is: a MBSFN (Multicast Broadcast corresponding for PMCH
Single Frequency Network, multicast broadcast single frequency network) region (Area) be more greatly
Sent by more community, and the 2nd PMCH is sent by less community.Inventor is by research
If it has furthermore been found that the channel of a PMCH and the 2nd PMCH estimates it is based on identical MBSFN
RS (Reference Signal, reference signal)-sent by described more community.One
Potential problem is, the wireless communication that the 2nd PMCH that target UE of the 2nd PMCH is estimated is experienced
Bigger error may be there is in the channel parameter in road.
For the problems referred to above, the invention provides solution.It should be noted that do not conflicting
In the case of, the embodiment in the UE of the application and the feature in embodiment may apply in base station,
Vice versa.Further, in the case of not conflicting, in embodiments herein and embodiment
Feature can arbitrarily be mutually combined.
The invention discloses a kind of method in UE supporting multi-user's superposition, wherein, including such as
Lower step:
-step A. receives the second reference signal and the second information
-step B. receives the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.
As an embodiment, according to the second reference signal, described UE determines that the second information is experienced
The channel parameter of wireless channel.As an embodiment, the first reference signal is outside MBSFN
Reference signal.As an embodiment, the second information is transmitted on PMCH.As a reality
Executing example, the first information transmits on PMCH.As an embodiment, described orthogonal refer to not
Overlapping.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
-step B1. determines the letter of wireless channel that the first information experienced according to the first reference signal
Road parameter.
Wherein, the RE (Resource Element, resource particle) shared by the first reference signal
It is divided into positive integer RE group.In each RE group, the modulation symbol sequence of the first reference signal
The modulation symbol sequence of row and the second reference signal is orthogonal, and described RE group includes L RE,
Described modulation symbol sequence includes that L modulation symbol, described L modulation symbol are mapped in institute respectively
Stating in L RE, described L is positive integer.
Said method guarantees orthogonal in each RE group of the first reference signal and the second reference signal
Property, it is to avoid second reference signal interference to the first reference signal.In addition, it is contemplated that the first ginseng
Examine the transmission number of cells less (i.e. maximum multipath time delay is less) of signal, estimate for channel with RE group
The smallest particles degree of meter can't substantially reduce the performance that channel is estimated.
As an embodiment, the transmission antenna port of the first information and the transmission of the first reference signal
Antenna port is identical, and all transmission communities of the first information and all transmissions of the first reference signal are little
District is identical.As an embodiment, the RE shared by the first reference signal and the second reference signal
Shared RE is the most overlapping.As an embodiment, the first reference signal take each
PRB (Physical Resource Element, Physical Resource Block) is interior to (Pair), and first
RE shared by reference signal and the RE shared by the second reference signal is identical.As described
One embodiment of step A1, described UE performs channel estimating operation based on the first reference signal,
Obtain described channel parameter.As an embodiment, described L is 2.As an embodiment,
Described RE group is by being positioned at an OFDM (Orthogonal Frequency Division
Multiplexing, OFDM) L adjacent RE composition on symbol.As one
Individual embodiment, described channel parameter is channel impulse response.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
-step B2. determines the letter of wireless channel that the first information experienced according to the first reference signal
Road parameter.
Wherein, the first reference signal at a PRB to the interior part occupied in available RE, institute
State available RE be MBSFN RS in one PRB to the interior all RE taken.
(the first reference signal and the second reference signal) this side of design intuitively completely overlapped
Case is compared, and above-mentioned aspect alleviates the interference to the second reference signal of first reference signal.First ginseng
Examine the density of RE shared by signal less than the RE shared by the second reference signal (i.e. MBSFN RS)
Density.Transmission number of cells in view of the first reference signal is less, and above-mentioned aspect can't be bright
Aobvious reduction channel estimating performance based on the first reference signal.
As an embodiment, in step B2, described UE is first from the first reference signal institute
The wireless signal received on the running time-frequency resource taken eliminates the interference of the second reference signal, then
The first wireless signal is utilized to perform channel estimating operation.As an embodiment, the first reference signal
It is identical at each shared PRB to interior pattern.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
According to the first reference signal and the second reference signal ,-step B3. determines that the first information is experienced
The channel parameter of wireless channel.
Wherein, the first reference signal be CRS (Cell specific Reference Signal, little
District's specific reference signals), the first information and the second reference signal are sent by identical antenna port.
As an embodiment, the first reference signal and the first information by and only by same service
Community sends.As an embodiment, in described step B3, described UE is according to the first reference letter
Number determine the statistical property of the wireless channel that the first information experienced, then according to described statistical property
Second reference signal is performed channel and estimates the channel of the wireless channel determining that the first information experienced
Parameter.Described statistical property include in { maximum Doppler frequency offset, maximum multipath time delay } at least it
One.
The essence of above-mentioned aspect is, UE obtains (being likely to of the first information according to the first reference signal
One) send community channel statistic, obtain the second information according to the second reference signal
(being likely to multiple) sends the channel parameter of the channel of the superposition of community, utilizes described statistics spy
Property recover from the channel parameter of the channel of described superposition the first information send community channel
Parameter.Above-mentioned aspect makes the first information and the identical MBSFN RS of the second information sharing for believing
Road is estimated, it is to avoid the interference to the second reference signal of first reference signal, ensure that simultaneously based on
The performance that the channel of the first reference signal is estimated.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A0. receives the first signaling, and the first signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the first reference signal.
As an embodiment, the first signaling is RRC (Radio Resource Control, nothing
Line resources control) layer signaling.As an embodiment, the described physics for carrying the first information
The RE mapping mode of layer channel reuses the RE mapping mode of PMCH.As an embodiment, institute
State ratio less than 0dB.As an embodiment, described ratio is not equal to 0dB.As a reality
Executing example, the first signaling instruction is for carrying EPRE (the Energy Per of the physical layer channel of the first information
Resource Element, every resource units energy) and the ratio of EPRE of the first reference signal.
As an embodiment, the EPRE and the EPRE of the first reference signal of the first signaling instruction first information
Between difference.As an embodiment, described transmit power is linear value, and described relation is ratio
Value.Last night one embodiment, described transmit power is dB or dBm, and described relation is difference.
As an embodiment, the first reference signal is CRS, the first reference signal.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A1. receives the second signaling, and (Identifier knows the second signaling instruction the oneth ID
Alias).
Wherein, an ID is used for the initialization of the maker of the RS sequence of the first reference signal, the
One ID is nonnegative integer, and an ID is that community is specific.
As an embodiment, an ID is that community is specific, and the i.e. the oneth ID is for single little
District (rather than MBSFN region) is by separate configurations.As an embodiment, an ID is
The community physics ID sending community of the first information.As an embodiment, an ID is different
In the nonnegative integer of the 2nd ID, the 2nd ID be by high-level signaling configure for the second reference signal
The initialized nonnegative integer of maker of RS sequence.As an embodiment, the first reference
The RS sequence of signal is pseudo-random sequence.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A2. receives the 3rd signaling, and the 3rd signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the second reference signal.
The invention discloses a kind of method in base station supporting multi-user's superposed transmission, wherein, bag
Include following steps:
-step A. sends the second reference signal and the second information
-step B. sends the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
-step B1. uses identical antenna port to send the first reference signal and the first information.
Wherein, the RE shared by the first reference signal is divided into positive integer RE group.Each
In RE group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal
Being orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol
Number, described L modulation symbol is mapped in described L RE respectively, and described L is positive integer.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
-step B2. uses identical antenna port to send the first reference signal and the first information.
Wherein, the first reference signal at a PRB to the interior part occupied in available RE, institute
State available RE be MBSFN RS in one PRB to the interior all RE taken.
Concrete, according to an aspect of the present invention, it is characterised in that described step B also includes
Following steps:
-step B3. uses identical antenna port to send the second reference signal and the first information.
Wherein, the first reference signal is CRS.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A0. sends the first signaling, and the first signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the first reference signal.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A1. sends the second signaling, the second signaling instruction the oneth ID.
Wherein, an ID is used for the initialization of the maker of the RS sequence of the first reference signal, the
One ID is nonnegative integer, and an ID is that community is specific.
Concrete, according to an aspect of the present invention, it is characterised in that described step A also includes
Following steps:
-step A2. sends the 3rd signaling, and the 3rd signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the second reference signal.
The invention discloses a kind of subscriber equipment supporting multi-user's superposed transmission, wherein, including such as
Lower module:
First module: for receiving the second reference signal and the second information
Second module: for receiving the first reference signal and the first information.According to { first with reference to letter
Number, the second reference signal at least the first reference signal to determine that the first information is experienced wireless
The channel parameter of channel.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.First reference signal is one below:
-. the RE shared by the first reference signal is divided into positive integer RE group.At each RE
In group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are
Orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol,
Described L modulation symbol is mapped in described L RE respectively, and described L is positive integer；
-. the first reference signal at a PRB to the interior part occupied in available RE, described
Available RE be MBSFN RS in one PRB to the interior all RE taken；
-.CRS。
The invention discloses a kind of base station equipment supporting multi-user's superposed transmission, wherein, including as follows
Module:
First module: for sending the second reference signal and the second information
Second module: for sending the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.First reference signal is one below:
-. the RE shared by the first reference signal is divided into positive integer RE group.At each RE
In group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are
Orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol,
Described L modulation symbol is mapped in described L RE respectively, and described L is positive integer；
-. the first reference signal at a PRB to the interior part occupied in available RE, described
Available RE be MBSFN RS in one PRB to the interior all RE taken；
-.CRS。
Comparing existing public technology, the present invention has a following technical advantage:
-. reduce the interference between the reference signal associated by the first information and the second information
-. (substantially) do not reduce the performance of the channel estimation for the first information
-. the reference signal associated by the first information and the second information is reused shared by MBSFN RS
RE, is not take up extra RE, improves efficiency of transmission.
Accompanying drawing explanation
The detailed description that non-limiting example is made made with reference to the following drawings by reading, this
The other features, objects and advantages of invention will become more apparent:
Fig. 1 shows the flow chart of downlink transfer according to an embodiment of the invention；
Fig. 2 shows the first reference signal according to an embodiment of the invention and the second reference signal
Schematic diagram orthogonal in being maintained at RE group；
Fig. 3 shows that the first reference signal according to an embodiment of the invention is the schematic diagram of CRS；
Fig. 4 shows that the first reference signal according to an embodiment of the invention takies part MBSFN
The schematic diagram of RS resource；
Fig. 5 shows the structured flowchart of the processing means in UE according to an embodiment of the invention；
Fig. 6 shows the structural frames of the processing means in base station according to an embodiment of the invention
Figure；
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in further detail, needs explanation
It is that, in the case of not conflicting, the feature in embodiments herein and embodiment can be the most mutual
Combination.
Embodiment 1
Embodiment 1 illustrates the flow chart of downlink transfer, as shown in Figure 1.In accompanying drawing 1, base station
N2 is the maintenance base station of the Serving cell of UE U1, and N3 (i.e. other base stations) represents outside the N2 of base station
One or more base station, wherein the step in square frame F1 is optional step.
ForUE U1, receive the first signaling in step slo；Receive second in step s 11
Information and the second reference signal, determine, according to the second reference signal, the wireless communication that the second information is experienced
The channel parameter in road；Receive the first information and the first reference signal in step s 12, according to the
One reference signal, the second reference signal } at least the first reference signal determine first information institute warp
The channel parameter of the wireless channel gone through.
ForBase station N2, step S20 sends the first signaling；Use identical in the step s 21
Antenna port sends the second information and the second reference signal；The first information and the is sent in step S22
One reference signal.
ForN3, use identical antenna port to send the second information and the second ginseng in step S31
Examine signal.
In embodiment 1, the running time-frequency resource shared by the first information and the time-frequency shared by the second information
Resource is all or part of overlapping, and the running time-frequency resource and second shared by the first information is with reference to letter
Number shared running time-frequency resource is orthogonal, and the running time-frequency resource and second that the second information takies is with reference to letter
Number running time-frequency resource taken is orthogonal.Running time-frequency resource shared by first reference signal is by the second ginseng
Examine shared by signal.Second reference signal is MBSFN RS.First signaling instruction is for carrying first
The transmit power of the physical layer channel of information and the relation of the transmit power of the first reference signal.
As the sub-embodiment 1 of embodiment 1, the first information transmits on a PMCH, the second letter
Breath transmits on the 2nd PMCH.The EPRE and first of the first signaling instruction the oneth PMCH is with reference to letter
Number the ratio of EPRE.
Embodiment 2
Embodiment 2 illustrates the first reference signal and the second reference signal is maintained at orthogonal showing in RE group
It is intended to, as shown in Figure 2.Accompanying drawing 2 illustrates a PRB to internal resource distribution, thin frame
Blank lattice be allocated to the first information and the RE of the second information, the blank lattice of thick frame is
Distribute to PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel)
RE, oblique line fill lattice be the RE shared by the first reference signal and the second reference signal, hand over
The lattice that cross wires is filled is the RE that CRS takies.
In embodiment 2, the first reference signal is distributed in multiple PRB to upper, wherein at each PRB
To upper, the RE shared by the first reference signal and the second reference signal is completely superposed.At each
PRB is to interior, and the RE shared by the first reference signal is divided into 6 RE groups.In each RE group
In, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are just
Handing over, described RE group includes 3 RE, and described modulation symbol sequence includes 3 modulation symbols,
Described 3 modulation symbols are mapped in described 3 RE respectively.In accompanying drawing 2, identify identical number
3 RE of word belong to same RE group.
As the sub-embodiment 1 of embodiment 2, the second reference signal is in three modulation of given RE group
Symbol is respectively as follows:First reference signal is corresponding described given RE group
Three modulation symbols are respectively as follows:Wherein θ1, θ2, θ3It is respectively greater than
-π and less than or equal to π.
Embodiment 3
Embodiment 3 illustrates the schematic diagram that the first reference signal is CRS, as shown in Figure 3.Accompanying drawing
3 illustrate a PRB distributes internal resource, and the blank lattice of thin frame is allocated to first
Information and the RE of the second information, the blank lattice of thick frame is allocated to the RE of PDCCH, and oblique line is filled out
The lattice filled is the RE shared by the second reference signal, and the lattice that backslash is filled is CRS port
0 RE taken, the lattice that reticule is filled is the RE shared by the first reference signal i.e. CRS
Port 1.
In embodiment 3, target UE of the first information is according to the first reference signal and the second reference signal
Determine the channel parameter of the wireless channel that the first information experienced.The transmission community of the first information uses
Identical antenna port sends the first information and the second reference signal.First reference signal is by the first letter
The transmission community of breath is sent.
As the sub-embodiment 1 of embodiment 3, above-mentioned target UE determines according to the first reference signal
The maximum multipath time delay of the wireless channel that one information is experienced, then performs letter to the second reference signal
The channel impulse response of time domain is estimated to obtain in road, intercepts institute from the channel impulse response of described time domain
State the channel parameter of the wireless channel that the tap in maximum multipath time delay is experienced as the first information.
As the sub-embodiment 2 of embodiment 3, the transmission community of the first information send the 3rd signaling to
Target UE of the first information.3rd signaling instruction is for carrying sending out of the physical layer channel of the first information
Send the relation of the transmit power of power and the second reference signal.
Embodiment 4
Embodiment 4 illustrates the first reference signal and takies the schematic diagram of part MBSFN RS resource, as attached
Shown in Fig. 4.
Accompanying drawing 4 illustrates a PRB to internal resource distribution, and the blank lattice of thin frame is point
The dispensing first information and the RE of the second information, the lattice that reticule is filled is allocated to the RE of PDCCH,
The blank lattice of thick frame is the RE that the first reference signal takies, and the lattice that oblique line is filled is second
RE shared by reference signal, the lattice that backslash is filled is the RE that CRS takies.
In embodiment 4, target UE of the first information determines first information institute according to the first reference signal
The channel parameter of the wireless channel of experience.The community that sends of the first information uses identical antenna port
Send the first information and the first reference signal.
As the sub-embodiment 1 of embodiment 4, the transmission community of the first information sends the second signaling,
Second signaling instruction the oneth ID.Wherein, an ID is for the life of the RS sequence of the first reference signal
The initialization grown up to be a useful person, an ID is nonnegative integer, and an ID is that community is specific.First reference
The RS sequence of signal is pseudo-random sequence.
As a sub-embodiment of an ID, an ID is the little of the transmission community of the first information
District physics ID, the first information is only sent by a Serving cell.
Embodiment 5
Embodiment 5 illustrates the structured flowchart of the processing means in a UE, as shown in Figure 5.Attached
In Fig. 5, UE processing means 200 is mainly made up of receiver module 201 and receiver module 202.
Receiver module 201 is for receiving the second reference signal and the second information.Receiver module 202 is used
In receiving the first reference signal and the first information.According to { the first reference signal, the second reference signal }
In at least the first reference signal determine the channel parameter of wireless channel that the first information experienced.
In embodiment 5, the running time-frequency resource shared by the first information and the time-frequency shared by the second information
Resource is all or part of overlapping, and the running time-frequency resource and second shared by the first information is with reference to letter
Number shared running time-frequency resource is orthogonal, and the running time-frequency resource and second that the second information takies is with reference to letter
Number running time-frequency resource taken is orthogonal.Running time-frequency resource shared by first reference signal is by the second ginseng
Examine shared by signal.Second reference signal is MBSFN RS.
As the sub-embodiment 1 of embodiment 5, receiver module 202 is additionally operable to according to the first reference signal
Determine the channel parameter of the wireless channel that the first information experienced.RE shared by first reference signal
It is divided into positive integer RE group.In each RE group, the modulation symbol sequence of the first reference signal
The modulation symbol sequence of row and the second reference signal is orthogonal, and described RE group includes L RE,
Described modulation symbol sequence includes that L modulation symbol, described L modulation symbol are mapped in institute respectively
Stating in L RE, described L is positive integer.
As a sub-embodiment of the sub-embodiment 1 of embodiment 5, receiver module 202 uses as follows
The channel parameter of the wireless channel that the method calculating first information is experienced:
-. the wireless signal received on each (shared by the first reference signal) RE is multiplied by
The conjugation of the one corresponding modulation symbol of reference signal obtains aiming symbol, by each described RE group
Described aiming symbol be added the available reference signal that obtains, perform for described available reference signal
Channel is estimated to obtain above-mentioned channel parameter.
Aforesaid operations eliminates most (if not all) in described available reference signal
The interference of the second reference signal.
As the sub-embodiment 2 of embodiment 5, receiver module 202 is additionally operable to according to the first reference signal
Determine the channel parameter of the wireless channel that the first information experienced.First reference signal is at a PRB
Internally occupying the part in available RE, described available RE is that MBSFN RS is in one
PRB is to the interior all RE taken.
As the sub-embodiment 3 of embodiment 5, receiver module 202 be additionally operable to according to the first reference signal and
Second reference signal determines the channel parameter of the wireless channel that the first information experienced.Wherein, first
Reference signal is CRS, and the first information and the second reference signal are sent by identical antenna port.
Embodiment 6
Embodiment 6 illustrates the structured flowchart of the processing means in a base station, as shown in Figure 6.
In accompanying drawing 6, base station processing means 300 is mainly made up of sending module 301 and sending module 302.
Sending module 301 is for sending the second reference signal and the second information.Sending module 302 is used
In sending the first reference signal and the first information.
In embodiment 6, the running time-frequency resource shared by the first information and the time-frequency shared by the second information
Resource is all or part of overlapping, and the running time-frequency resource and second shared by the first information is with reference to letter
Number shared running time-frequency resource is orthogonal, and the running time-frequency resource and second that the second information takies is with reference to letter
Number running time-frequency resource taken is orthogonal.Running time-frequency resource shared by first reference signal is by the second ginseng
Examine shared by signal.Second reference signal is MBSFN RS.First reference signal is one below:
-. the RE shared by the first reference signal is divided into positive integer RE group.At each RE
In group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are
Orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol,
Described L modulation symbol is mapped in described L RE respectively, and described L is positive integer；
-. the first reference signal at a PRB to the interior part occupied in available RE, described
Available RE be MBSFN RS in one PRB to the interior all RE taken；
-.CRS。
Upload at PMCH respectively as the sub-embodiment 1 of embodiment 6, the first information and the second information
Defeated.
As the sub-embodiment 2 of embodiment 6, the first information occupies of whole system bandwidth
Point, the second information occupies whole system bandwidth.
As the sub-embodiment 3 of embodiment 6, except the base station belonging to processing means 300, also has it
His base station also sends the second information and the second reference signal.
One of ordinary skill in the art will appreciate that all or part of step in said method is permissible
Instructing related hardware by program to complete, described program can be stored in computer-readable storage medium
In matter, such as read only memory, hard disk or CD etc..Optionally, above-described embodiment whole or
Part steps can also use one or more integrated circuit to realize.Accordingly, above-mentioned enforcement
Each modular unit in example, can use example, in hardware to realize, it is also possible to by software function module
Form realizes, and the application is not limited to the combination of the software and hardware of any particular form.In the present invention
UE include but not limited to the Wireless Telecom Equipments such as mobile phone, panel computer, notebook, card of surfing Internet.
Base station in the present invention includes but not limited to macrocell base stations, microcell base station, Home eNodeB, in
Continue the Wireless Telecom Equipments such as base station.
The above, only presently preferred embodiments of the present invention, it is not intended to limit the present invention's
Protection domain.All within the spirit and principles in the present invention, any amendment made, equivalent,
Improve, should be included within the scope of the present invention.
Claims (16)
1. support the method in the UE of multi-user's superposed transmission, wherein, comprise the steps:
-step A. receives the second reference signal and the second information
-step B. receives the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.
Method the most according to claim 1, it is characterised in that described step B also include as
Lower step:
-step B1. determines the letter of wireless channel that the first information experienced according to the first reference signal
Road parameter.
Wherein, the RE shared by the first reference signal is divided into positive integer RE group.Each
In RE group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal
Being orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol
Number, described L modulation symbol is mapped in described L RE respectively, and described L is positive integer.
Method the most according to claim 1, it is characterised in that described step B also include as
Lower step:
-step B2. determines the letter of wireless channel that the first information experienced according to the first reference signal
Road parameter.
Wherein, the first reference signal at a PRB to the interior part occupied in available RE, institute
State available RE be MBSFN RS in one PRB to the interior all RE taken.
Method the most according to claim 1, it is characterised in that described step B also include as
Lower step:
According to the first reference signal and the second reference signal ,-step B3. determines that the first information is experienced
The channel parameter of wireless channel.
Wherein, the first reference signal is CRS, and the first information and the second reference signal are by identical sky
Line cap sends.
5. the method according to claim 2, described in 3, it is characterised in that described step A is also wrapped
Include following steps:
-step A0. receives the first signaling, and the first signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the first reference signal.
6. the method according to claim 2, described in 3, it is characterised in that described step A is also wrapped
Include following steps:
-step A1. receives the second signaling, the second signaling instruction the oneth ID.
Wherein, an ID is used for the initialization of the maker of the RS sequence of the first reference signal, the
One ID is nonnegative integer, and an ID is that community is specific.
Method the most according to claim 4, it is characterised in that described step A also include as
Lower step:
-step A2. receives the 3rd signaling, and the 3rd signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the second reference signal.
8. support the method in the base station of multi-user's superposed transmission, wherein, including walking as follows
Rapid:
-step A. sends the second reference signal and the second information
-step B. sends the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.
Method the most according to claim 8, it is characterised in that described step B also include as
Lower step:
-step B1. uses identical antenna port to send the first reference signal and the first information.
Wherein, the RE shared by the first reference signal is divided into positive integer RE group.Each
In RE group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal
Being orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol
Number, described L modulation symbol is mapped in described L RE respectively, and described L is positive integer.
Method the most according to claim 8, it is characterised in that described step B also includes
Following steps:
-step B2. uses identical antenna port to send the first reference signal and the first information.
Wherein, the first reference signal at a PRB to the interior part occupied in available RE, institute
State available RE be MBSFN RS in one PRB to the interior all RE taken.
11. methods according to claim 8, it is characterised in that described step B also includes
Following steps:
-step B3. uses identical antenna port to send the second reference signal and the first information.
Wherein, the first reference signal is CRS.
12. according to claim 9, the method described in 10, it is characterised in that described step A is also
Comprise the steps:
-step A0. sends the first signaling, and the first signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the first reference signal.
13. according to claim 9, the method described in 10, it is characterised in that described step A is also
Comprise the steps:
-step A1. sends the second signaling, the second signaling instruction the oneth ID.
Wherein, an ID is used for the initialization of the maker of the RS sequence of the first reference signal, the
One ID is nonnegative integer, and an ID is that community is specific.
14. methods according to claim 11, it is characterised in that described step A is also wrapped
Include following steps:
-step A2. sends the 3rd signaling, and the 3rd signaling instruction is for carrying the physics of the first information
The transmit power of layer channel and the relation of the transmit power of the second reference signal.
15. 1 kinds of subscriber equipmenies supporting multi-user's superposed transmission, wherein, including such as lower module:
First module: for receiving the second reference signal and the second information
Second module: for receiving the first reference signal and the first information.According to { first with reference to letter
Number, the second reference signal at least the first reference signal to determine that the first information is experienced wireless
The channel parameter of channel.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.First reference signal is one below:
-. the RE shared by the first reference signal is divided into positive integer RE group.At each RE
In group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are
Orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol,
Described L modulation symbol is mapped in described L RE respectively, and described L is positive integer；
-. the first reference signal at a PRB to the interior part occupied in available RE, described
Available RE be MBSFN RS in one PRB to the interior all RE taken；
-.CRS。
16. 1 kinds of base station equipments supporting multi-user's superposed transmission, wherein, including such as lower module:
First module: for sending the second reference signal and the second information
Second module: for sending the first reference signal and the first information.
Wherein, the running time-frequency resource shared by the first information and the running time-frequency resource shared by the second information are
All or part of overlapping, shared by running time-frequency resource shared by the first information and the second reference signal
Running time-frequency resource be orthogonal, running time-frequency resource and the second reference signal that the second information takies take
Running time-frequency resource be orthogonal.Running time-frequency resource shared by first reference signal is by the second reference signal
Shared.Second reference signal is MBSFN RS.First reference signal is one below:
-. the RE shared by the first reference signal is divided into positive integer RE group.At each RE
In group, the modulation symbol sequence of the first reference signal and the modulation symbol sequence of the second reference signal are
Orthogonal, described RE group includes that L RE, described modulation symbol sequence include L modulation symbol,
Described L modulation symbol is mapped in described L RE respectively, and described L is positive integer；
-. the first reference signal at a PRB to the interior part occupied in available RE, described
Available RE be MBSFN RS in one PRB to the interior all RE taken；
-.CRS。
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