CN107248905A - A kind of up DMRS transmission methods of multiuser MIMO - Google Patents
A kind of up DMRS transmission methods of multiuser MIMO Download PDFInfo
- Publication number
- CN107248905A CN107248905A CN201610172036.7A CN201610172036A CN107248905A CN 107248905 A CN107248905 A CN 107248905A CN 201610172036 A CN201610172036 A CN 201610172036A CN 107248905 A CN107248905 A CN 107248905A
- Authority
- CN
- China
- Prior art keywords
- dmrs
- bandwidth
- frequency domain
- data
- domain positions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 125000004122 cyclic group Chemical group 0.000 claims description 7
- 230000011664 signaling Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
-
- 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
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes a kind of up DMRS transmission methods of multiuser MIMO, including：It is the multiple user configuring identical DMRS bandwidth and identical DMRS frequency domain positions when the frequency domain resource of multiple users is overlapping, the identical DMRS frequency domain positions cover all data bandwidths of the multiple user.
Description
Technical field
The present invention relates to the up DMRS transmission methods in LTE communication field, more particularly to a kind of multiuser MIMO.
Background technology
In existing LTE system, DMRS (demodulated reference signals, Demodulation Reference Signals) it is the reference symbol demodulated for data, the DMRS sequences of same UE different port use the ZC sequences of different cyclic shifts, its bandwidth is consistent with the data bandwidth transmitted by UE, therefore difference UE DMRS sequences have different length, it can cause larger interference because the cross correlation of different length ZC sequences is poor, therefore when the bandwidth of two users is differed when being uplink multi-users MIMO.The orthogonal code that OCC is 2 is introduced in order to solve this problem, it is allowed to which still subcarrier has the UE of overlapping dislocation while orthogonal transmission for most 2 difference DMRS bandwidth or identical DMRS bandwidth in LTE R10 versions.
In FDMIMO, because base station end has more dual-mode antennas, more users will be supported to carry out MU-MIMO transmission simultaneously, and R10 versions at most allow 2 UE orthogonal transmission DMRS under the DMRS bandwidth overlays of part, or allow multiple UE to carry out MUMIMO scheduling in the case where DMRS bandwidth and frequency domain position are identical (now difference UE can be distinguished by different cyclic shifts), MUMIMO scheduling is so significantly limit, systemic loss of energy can be caused.
Based on this, in UE parts, it is necessary to propose a kind of to support more users quantity while carrying out the method for up DMRS transmission during DMRS bandwidth overlays.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of up DMRS transmission methods of multiuser MIMO, and this method includes：
It is the multiple user configuring identical DMRS bandwidth and identical DMRS frequency domain positions when the frequency domain resource of multiple users is overlapping, the identical DMRS frequency domain positions cover all data bandwidths of the multiple user.
It is preferred that, the identical DMRS bandwidth is the minimum length for meeting all data bandwidths that the identical DMRS frequency domain positions cover the multiple user.
It is preferred that, the above method also includes：Power Control is carried out to up DMRS transmission.The Power Control can be：Base station indicates the difference of DMRS transmit powers and data sending power, and UE indicates to adjust DMRS transmit powers according to described.
In above-mentioned all methods, distinguished between same UE different port by the different cyclic shifts of DMRS sequences.
In the case of User Part bandwidth overlay in being transmitted in uplink multi-users, the up supported numbers of users of DMRS are extended, and then make it that orthogonal DMRS port number is also extended, it can preferably support the MU-MIMO transmission of multi-user.
Brief description of the drawings
Fig. 1 is position and the length schematic diagram of each DMRS sequences in the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the 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 be mutually combined.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
UE transmission DMRS bandwidth is consistent with the data bandwidth transmitted by UE in existing LTE technologies, and DMRS bandwidth need not be separately configured.And in the embodiment of the present invention, when there is k UE to have overlapping in the scheduling resource of frequency domain, in order to ensure that the DMRS between UE is orthogonal, base station will be wherein each UE separate configurations DMRS bandwidth, and the DMRS bandwidth and DMRS frequency domain position all sames configured for all k UE, DMRS frequency domain positions cover the bandwidth that all k UE transmit data.This way relieves DMRS bandwidth and limited with data bandwidth identical, because each UE DMRS series lengths are identical, therefore can support multiple users while carrying out up DMRS transmission.
As shown in Figure 1, assuming that base station scheduled UE1, UE2, UE3 simultaneously, they partly overlap in the scheduling bandwidth of frequency domain, the length for the DMRS pilot frequency sequences that this 3 UE are sent is respectively N1, N2, N3, because DMRS sequence lengths are different, the DMRS pilot tones that this 3 UE are sent are non-orthogonal, have very big inter-user interference.It is that each UE configures identical DMRS sequence lengths N4 and identical frequency domain position to solve base station in this problem, the present embodiment, wherein N4 is the minimum length for the data bandwidth for covering this 3 UE.Distinguished in the present embodiment between same UE different port still through the different cyclic shifts of DMRS sequences, so base station will also configure each UE DMRS cyclic shifts CS1, CS, CS3.
In the present invention, because DMRS frequency domain positions cover all overlapping UE data bandwidth, therefore UE DMRS bandwidth is naturally larger than data bandwidth, user needs to be more than data power in the pilot power of time domain, it is not problem that less UE, which is lost, for upward signal in this, because he can have enough power to send the pilot tone of large bandwidth, but for larger UE is lost in upward signal, it is possible to data division bandwidth and is exactly its maximum transmit power, the pilot tone of so bigger bandwidth does not have then enough power to send out, certainly this can be avoided by BS scheduling strategy, it can also to be still able to continue to send upward signal during power limited by carrying out pilot tone Power Control simultaneously, the Power Control of pilot tone may also reach up the purpose for the time-domain signal power that balance UE is sent.
The idiographic flow of the present embodiment is as follows：
(1) base station scheduling UE data resources position, and the following information of UE is notified by downlink signaling：Position and bandwidth, DMRS length and position, the cyclic shift of used DMRS sequences, other data demodulation relevant information shared by data.Base station extra increase DMRS power indication fields also in downlink signaling, are used to refer to the difference of DMRS transmit powers and data sending power, and the signaling can be dynamic configuration or be semi-statically configured.
(2) UE sends upstream data according to the BS data resources indicated, DMRS is sent according to the BS pilot frequency informations indicated, while adjusting DMRS transmit powers according to DMRS power indication field.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, and foregoing program can be stored in a computer read/write memory medium, and the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are 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 can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a kind of up DMRS transmission methods of multiuser MIMO, it is characterised in that methods described bag
Include：
When the frequency domain resource of multiple users is overlapping, be the multiple user configuring identical DMRS bandwidth and
Identical DMRS frequency domain positions, the identical DMRS frequency domain positions cover the institute of the multiple user
There is data bandwidth.
2. according to the method described in claim 1, it is characterised in that：
The identical DMRS bandwidth be meet the identical DMRS frequency domain positions cover it is the multiple
The minimum length of all data bandwidths of user.
3. according to the method described in claim 1, it is characterised in that methods described also includes：
Power Control is carried out to up DMRS transmission.
4. according to the method described in claim 1, it is characterised in that the Power Control is specially：
Base station indicates the difference of DMRS transmit powers and data sending power, and UE indicates to adjust according to described
DMRS transmit powers.
5. the method according to Claims 1 to 4 any one, it is characterised in that：
Distinguished between same UE different port by the different cyclic shifts of DMRS sequences.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172036.7A CN107248905A (en) | 2016-03-24 | 2016-03-24 | A kind of up DMRS transmission methods of multiuser MIMO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172036.7A CN107248905A (en) | 2016-03-24 | 2016-03-24 | A kind of up DMRS transmission methods of multiuser MIMO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107248905A true CN107248905A (en) | 2017-10-13 |
Family
ID=60016087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610172036.7A Withdrawn CN107248905A (en) | 2016-03-24 | 2016-03-24 | A kind of up DMRS transmission methods of multiuser MIMO |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107248905A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110830195A (en) * | 2018-08-09 | 2020-02-21 | 华为技术有限公司 | Information processing method and communication device |
| WO2021244083A1 (en) * | 2020-06-03 | 2021-12-09 | 中兴通讯股份有限公司 | Dmrs allocating method, nr base station, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170343A (en) * | 2006-02-06 | 2011-08-31 | 华为技术有限公司 | Uplink multi-user pilot frequency method for reducing interference among cells |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
| CN103973392A (en) * | 2013-01-24 | 2014-08-06 | 中兴通讯股份有限公司 | Parameter sending method and device and uplink demodulation reference signal emission method and device |
| CN103974418A (en) * | 2013-01-24 | 2014-08-06 | 中兴通讯股份有限公司 | DMRS processing method and device |
| CN104105120A (en) * | 2013-04-08 | 2014-10-15 | 中兴通讯股份有限公司 | Interference measuring method, network side equipment and terminal equipment |
-
2016
- 2016-03-24 CN CN201610172036.7A patent/CN107248905A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170343A (en) * | 2006-02-06 | 2011-08-31 | 华为技术有限公司 | Uplink multi-user pilot frequency method for reducing interference among cells |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
| CN103973392A (en) * | 2013-01-24 | 2014-08-06 | 中兴通讯股份有限公司 | Parameter sending method and device and uplink demodulation reference signal emission method and device |
| CN103974418A (en) * | 2013-01-24 | 2014-08-06 | 中兴通讯股份有限公司 | DMRS processing method and device |
| CN104105120A (en) * | 2013-04-08 | 2014-10-15 | 中兴通讯股份有限公司 | Interference measuring method, network side equipment and terminal equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110830195A (en) * | 2018-08-09 | 2020-02-21 | 华为技术有限公司 | Information processing method and communication device |
| CN110830195B (en) * | 2018-08-09 | 2021-10-01 | 华为技术有限公司 | Information processing method and communication device |
| US11848808B2 (en) | 2018-08-09 | 2023-12-19 | Huawei Technologies Co., Ltd. | Information processing method and communications apparatus |
| WO2021244083A1 (en) * | 2020-06-03 | 2021-12-09 | 中兴通讯股份有限公司 | Dmrs allocating method, nr base station, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102817704B1 (en) | Method for indicating reference signal configuration information, base station, and terminal | |
| CN110536450B (en) | A data transmission method, device, transmission receiving node, terminal and medium | |
| US12328161B2 (en) | Methods and devices for feeding back and configuring pilot parameters, user terminal and base station | |
| CN107040354B (en) | Uplink DMRS configuration method, network element, uplink DMRS transmission method and device | |
| JP6599474B2 (en) | DMRS based DL for low latency | |
| CN108631987B (en) | Reference signal processing method and device | |
| JP6655251B2 (en) | How to send a reference signal | |
| CN102811107B (en) | Pilot frequency sequence collocation method and the network equipment | |
| JP2022003808A (en) | Method for adapting density of reference signal for demodulation | |
| CN103959872B (en) | The mapping method and device of the search space of down control channel | |
| CN108112076B (en) | Method and device for configuring uplink signals | |
| US10581640B2 (en) | Channel estimation method, reference signal sending method, apparatus, and system | |
| WO2018141108A1 (en) | Low peak-to-average power ratio precoded reference signal design for multiple-input, multiple-output transmissions | |
| CN106922207A (en) | Downlink channel estimation method, device and communication system based on sounding reference signal | |
| CN102202409A (en) | Method for determining reference symbol | |
| US20140355559A1 (en) | Control channel resource transmission method, base station and user equipment | |
| CN110249682B (en) | Method and apparatus for resource management of long-term evolution and coexistence of new radio systems | |
| US20220123894A1 (en) | Methods and apparatuses for determining a phase tracking reference signal configuration parameter | |
| CN103188799A (en) | Sending method, detecting method and detecting device of control signaling | |
| KR20220130107A (en) | Method for Unified Uplink and Downlink Beam Indication | |
| CN110475348B (en) | Method and device for transmitting PUCCH and readable storage medium | |
| CN109863713A (en) | Data communication apparatus, data communication system and method using reference symbols | |
| CN107248905A (en) | A kind of up DMRS transmission methods of multiuser MIMO | |
| CN105144601A (en) | Channel quality indication feedback method, resource scheduling information sending method and device | |
| CN108631835A (en) | A kind of signaling indication method and device of transmission mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171013 |