CN107888253A - A kind of method of reduction CSI RS reference signal density - Google Patents
A kind of method of reduction CSI RS reference signal density Download PDFInfo
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- CN107888253A CN107888253A CN201610873022.8A CN201610873022A CN107888253A CN 107888253 A CN107888253 A CN 107888253A CN 201610873022 A CN201610873022 A CN 201610873022A CN 107888253 A CN107888253 A CN 107888253A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- 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
Abstract
The present invention proposes a kind of method of reduction CSI RS reference signal density, and methods described includes：CSI RS ports are in a PRB in each or multiple PRB, each or multiple PRB are referred to as a PRB resource group, and the offset information of the length information of PRB resource groups and the CSI RS ports in corresponding PRB resources group corresponding to the CSI RS ports is indicated in high-rise configuration information.The present invention can reduce CSI RS resources and send density, and to reduce the resource overhead of reference signal, the influence to agreement is smaller.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of method of reduction CSI-RS reference signal density.
Background technology
CSI-RS (the Channel-State Information-Reference that LTE is supported in LTE Rel-13 versions
Signal, channel state information reference signals) maximum port is 16 ports, its density is 1RE/RB/port, and each port takes
All of the port is included in a RE (Resource Element) in each RB (Resource Block), i.e., each PRB.
In LTE Rel-14 versions, research introduces the CSI-RS of { 20,24,28,32 } port, if it is close still to adopt original reference signal
Degree, then the RE number in a PRB shared by CSI-RS is maximum up to 32, that is, accounts for always can use the 25% of RE number.Consider
It is to punch to realize in PDSCH to the RE shared by CSI-RS, reference signal expense is big, will influence the transmission matter of data channel
Amount.So in 3GPP FD-MIMO problems, it is desirable to the density of reference signal is reduced, to save resource overhead.
Determine to reduce reference signal density using FDM (frequency division multiplexing) method at present, in Non-precoded CSI-RS
1/2 can be introduced in (non-precoded CSI-RS), less than 1/3, and is possible to introduce the density such as 2/3,3/4；
In a PRB during all of the port is only in per N number of PRB in Beamformed CSI-RS (beam forming CSI-RS) resource, its
Middle N can be 2 or more than 2.But there is presently no propose a kind of concrete methods of realizing for how reducing reference signal density.
The content of the invention
In order to solve the problems, such as background technology proposition, the present invention proposes a kind of frequency sweeping method and dress of wireless Mesh netword
Put, this method includes：
CSI-RS ports are in a PRB in each or multiple PRB, and each or multiple PRB are referred to as one
Individual PRB resources group, the length information of PRB resource groups corresponding to the CSI-RS ports and described is indicated in high-rise configuration information
Offset information of the CSI-RS ports in corresponding PRB resources group.
Preferably, the CSI-RS is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
With the biasing all same in corresponding PRB resources group, in high-rise configuration information CSI-RS-ConfigNZP-EMIMO or CSI-
In RS-ConfigNonPrecoded, increase a PRB resource group length information and an offset information, for all CSI-RS
Port.
Preferably, the CSI-RS is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
With the biasing all same in corresponding PRB resources group, in high-rise configuration information CSI-RS-ConfigNZP-EMIMO or CSI-
In RS-ConfigNonPrecoded, increase the index letter of the combination of an instruction PRB resource group length information and offset information
Breath, for all CSI-RS ports.
Preferably, the CSI-RS is non-precoded CSI-RS, in high-rise configuration information CSI-RS-ConfigNZP-
In EMIMO, individually increase the length information of its corresponding PRB resources group for each CSI-RS ports；In high-rise configuration information
In NZP-ResourceConfig, individually increase its offset information in corresponding PRB resources group for each CSI-RS ports.
Preferably, the CSI-RS is beam forming CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
With the biasing all same in corresponding PRB resources group, in high-rise configuration information CSI-RS-ConfigBeamformed, increase
Add a PRB resource group length information and an offset information, for all CSI-RS ports.
Preferably, the CSI-RS is beam forming CSI-RS, and all CSI-RS ports are inclined in the PRB resources group
All same is put, in high-rise configuration information CSI-RS-ConfigBeamformed, increases an instruction PRB resource groups length letter
The index information of the combination of breath and offset information, for all CSI-RS ports.
Preferably, the CSI-RS is beam forming CSI-RS, and all CSI-RS ports are inclined in the PRB resources group
All same is put, increases channelMeasRestriction letters in high-rise configuration information CSI-RS-ConfigBeamformed
The candidate item of breath, channelMeasRestriction are used for the combination for indicating PRB resource group length informations and offset information, and
And channelMeasRestriction represents 1 when being ON.
The present invention proposes specific high-level signaling collocation method, can reduce CSI-RS and send density, to reduce ginseng
The resource overhead of signal is examined, the influence to agreement is smaller, by eNB flexible configurations and can realize the transmission of a variety of different reference signals
Density, especially support that the different of different CSI-RS configurations resources send density and send PRB positions in non-precoded CSI-RS.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than
Whole embodiments；It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can
To be mutually combined.Based on the embodiment in the present invention, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of protection of the invention.
In the method for reduction CSI-RS reference signal density proposed by the present invention, for some CSI-RS port,
The port is in a PRB in each or multiple PRB, and each or multiple PRB are referred to as a PRB resource group, i.e., every
Individual PRB resources group only exists a CSI-RS, and PRB resources corresponding to the CSI-RS ports are indicated in high-rise configuration information
The length information and offset information of the CSI-RS ports in corresponding PRB resources group of group.
Embodiment 1
The CSI-RS of the present embodiment is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
With the biasing all same in corresponding PRB resources group, then can be in high-rise configuration information CSI-RS-ConfigNZP-
In EMIMO or CSI-RS-ConfigNonPrecoded, increase a PRB resource group length information and an offset information, use
In all CSI-RS ports.
Realization in high layer information CSI-RS-ConfigNZP-EMIMO is as follows：
Realization in high layer information CSI-RS-ConfigNonPrecoded is as follows：
Embodiment 2
The CSI-RS of the present embodiment is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
With the biasing all same in corresponding PRB resources group, can in high-rise configuration information CSI-RS-ConfigNZP-EMIMO or
In CSI-RS-ConfigNonPrecoded, increase the rope of the combination of an instruction PRB resource group length information and offset information
Fuse ceases, for all CSI-RS ports.
PRB resource group length can be obtained with the combination biased by following table：
| Index PCSI-RS | PRB resource group length | Biasing |
| 0–1 | 2 | PCSI-RS |
| 2–4 | 3 | PCSI-RS-2 |
| 5-8 | 4 | PCSI-RS-5 |
PCSI-RSSpan be expressed as 0~M-1, wherein M is the PRB resource group length sums of all permissions, i.e. upper table
Middle 2+3+4.
Index information can borrow the concept of channelMeasRestriction in beam forming CSI-RS, believe in high level
Ceasing increases the candidate item of channelMeasRestriction information in CSI-RS-ConfigBeamformed, type is
ENUMERATED (selects one) i.e. from candidate item.
Realization in high layer information CSI-RS-ConfigNZP-EMIMO is as follows：
Realization in high layer information CSI-RS-ConfigNonPrecoded is as follows：
Embodiment 3
The CSI-RS of the present embodiment is non-precoded CSI-RS, and non-precoded CSI-RS is by several 4 ports or 8 ends
Mouth CSI-RS configurations are polymerized, and the length of the PRB resource groups of each CSI-RS ports is incomplete same, then can be in high level
It is the length information and offset information that PRB resource groups are separately configured in each CSI-RS ports in configuration information.Specially：In high level
In configuration information CSI-RS-ConfigNZP-EMIMO, individually increase its corresponding PRB resources group for each CSI-RS ports
Length information；In high-rise configuration information NZP-ResourceConfig, individually increase it corresponding for each CSI-RS ports
PRB resource groups in offset information.Realize as follows：
Above-mentioned nzp-resourceConfigList is original field：
Embodiment 4
The CSI-RS of the present embodiment is beam forming CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports
, can be in high-rise configuration information CSI-RS-ConfigBeamformed with the biasing all same in corresponding PRB resources group
In, increase a PRB resource group length information and an offset information, for all CSI-RS ports.It is implemented as：
Embodiment 5
The CSI-RS of the present embodiment is beam forming CSI-RS, and all CSI-RS ports are inclined in the PRB resources group
All same is put, in high-rise configuration information CSI-RS-ConfigBeamformed, increases an instruction PRB resource groups length letter
The index information of the combination of breath and offset information, for all CSI-RS ports.It is implemented as：
Embodiment 6
The CSI-RS of the present embodiment is beam forming CSI-RS, and all CSI-RS ports are inclined in the PRB resources group
All same is put, increases channelMeasRestriction letters in high-rise configuration information CSI-RS-ConfigBeamformed
The candidate item (the originally only candidate of { ON }) of breath, channelMeasRestriction are used to indicate that PRB resource groups length is believed
The combination of breath and offset information, and 1 is represented when channelMeasRestriction is ON.It is implemented as：
PRB resource group length can use real with the combination of biasing with channelMeasRestriction corresponding relation
Apply the content in the form of example 2.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program
Upon execution, the step of execution includes above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (7)
- A kind of 1. method of reduction CSI-RS reference signal density, it is characterised in that methods described includes：CSI-RS ports are in a PRB in each or multiple PRB, and each or multiple PRB are referred to as a PRB Resource group, the length information of PRB resource groups and the CSI- corresponding to the CSI-RS ports are indicated in high-rise configuration information Offset information of the RS ports in corresponding PRB resources group.
- 2. according to the method for claim 1, it is characterised in that：The CSI-RS is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports and corresponding Biasing all same in PRB resource groups, in high-rise configuration information CSI-RS-ConfigNZP-EMIMO or CSI-RS- In ConfigNonPrecoded, increase a PRB resource group length information and an offset information, for all CSI-RS ends Mouthful.
- 3. according to the method for claim 1, it is characterised in that：The CSI-RS is non-precoded CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports and corresponding Biasing all same in PRB resource groups, in high-rise configuration information CSI-RS-ConfigNZP-EMIMO or CSI-RS- In ConfigNonPrecoded, increase the index information of the combination of an instruction PRB resource group length information and offset information, For all CSI-RS ports.
- 4. according to claim, the method described in 1, it is characterised in that：The CSI-RS is non-precoded CSI-RS, is each in high-rise configuration information CSI-RS-ConfigNZP-EMIMO CSI-RS ports individually increase the length information of its corresponding PRB resources group；In high-rise configuration information NZP- In ResourceConfig, individually increase its offset information in corresponding PRB resources group for each CSI-RS ports.
- 5. according to the method for claim 1, it is characterised in that：The CSI-RS is beam forming CSI-RS, the length of PRB resource groups corresponding to all CSI-RS ports and corresponding Biasing all same in PRB resource groups, in high-rise configuration information CSI-RS-ConfigBeamformed, increase a PRB moneys Source group length information and an offset information, for all CSI-RS ports.
- 6. according to the method for claim 1, it is characterised in that：The CSI-RS is beam forming CSI-RS, biasing all same of all CSI-RS ports in the PRB resources group, In high-rise configuration information CSI-RS-ConfigBeamformed, increase an instruction PRB resource group length information and offset information Combination index information, for all CSI-RS ports.
- 7. according to the method for claim 1, it is characterised in that：The CSI-RS is beam forming CSI-RS, biasing all same of all CSI-RS ports in the PRB resources group, Increase the candidate item of channelMeasRestriction information in high-rise configuration information CSI-RS-ConfigBeamformed, ChannelMeasRestriction is used for the combination for indicating PRB resource group length informations and offset information, and ChannelMeasRestriction represents 1 when being ON.
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| CN201610873022.8A CN107888253A (en) | 2016-09-30 | 2016-09-30 | A kind of method of reduction CSI RS reference signal density |
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| CN201610873022.8A CN107888253A (en) | 2016-09-30 | 2016-09-30 | A kind of method of reduction CSI RS reference signal density |
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| US20160112099A1 (en) * | 2013-05-30 | 2016-04-21 | Lg Electronicsinc. | Reference signals extension for massive mimo system |
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2016
- 2016-09-30 CN CN201610873022.8A patent/CN107888253A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150244508A1 (en) * | 2012-09-11 | 2015-08-27 | Lg Electronics Inc. | Method and apparatus for transmitting channel state information-reference signals in wireless communication system |
| CN103997722A (en) * | 2013-02-18 | 2014-08-20 | 中兴通讯股份有限公司 | Method and system for demodulation reference signal |
| US20160112099A1 (en) * | 2013-05-30 | 2016-04-21 | Lg Electronicsinc. | Reference signals extension for massive mimo system |
| CN105490787A (en) * | 2014-09-15 | 2016-04-13 | 中兴通讯股份有限公司 | Downlink pilot frequency transmission method, detection method, device, base station, and terminal |
Non-Patent Citations (1)
| Title |
|---|
| ZTE: "Enhancements on Beamformed CSI-RS", 《3GPP TSG RAN WG1 MEETING #84BIS R1-162346》 * |
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