CN102318399B - Enable the user terminal correctly method of demodulating data and network entity - Google Patents
Enable the user terminal correctly method of demodulating data and network entity Download PDFInfo
- Publication number
- CN102318399B CN102318399B CN200980156972.7A CN200980156972A CN102318399B CN 102318399 B CN102318399 B CN 102318399B CN 200980156972 A CN200980156972 A CN 200980156972A CN 102318399 B CN102318399 B CN 102318399B
- Authority
- CN
- China
- Prior art keywords
- channel
- user terminal
- data
- estimation
- aggregate
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/38—Reselection control by fixed network equipment
- H04W36/385—Reselection control by fixed network equipment of the core network
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and network entity for the data that enable user terminal correctly demodulate reception in mobile communication system.In the present invention, the data are sent by second channel or are sent by the first channel and second channel, and the user terminal can only obtain first channel estimation or the aggregate channel of the first channel and second channel estimates that methods described includes：Before the data are sent by second channel, to market demand puppet channel precoding, so that the user terminal can use the first channel estimation or the aggregate channel of the first channel and second channel to estimate, correctly demodulate the data of reception.It is not necessary according to the invention that making any change to user terminal, it is possible to enable user terminal using the channel estimation that can be obtained, correctly demodulate the data of reception.
Description
Technical field
The present invention relates to the communications field, more particularly, the present invention relate to make user terminal in mobile communication system
Method and the network entity of the data of reception can correctly be demodulated.
Background technology
Relaying is considered as one of key technology in the Long Term Evolution project (LTE-A) in evolution.In 3GPP RAN1#
(hold in March, 2009) in 56bis meetings, had agreed to Type II relaying, and Type II relaying has been write into standard
(R1-091632).Type II relaying framework is defined as：
1. Type II relaying should not have single cell ID, and therefore not produce any new cell；
2. Type II relaying to version 8 user terminal (UE) relay data, and be able to can be relayed from version 8UE's
Data；
3. at least version 8UE should not recognize the presence of Type II relaying.
LTE cell specific reference signals (CRS) can be regarded as the designator of LTE physical-layer cell identities.In LTE specification
Defined in 510 CRS sequences, corresponding to 510 different cell identities." Type II relaying should not have individually sentence
Cell ID, and therefore do not produce any new cell " it is meant that CRS of the Type II via node (RN) without its own.Change sentence
Talk about, Type II via node does not send CRS, or the CRS that transmission eNB (NB in evolution) associated there sends is identical
CRS.
For version 8UE, in order to implement downstream modulation, need to obtain down channel estimation by CRS.However,
As via node (RN) does not send the CRS of their own, therefore obtain downlink data despite from RN, but UE must use from
The CRS of corresponding eNB is obtaining eNB → UE channel estimations, and using eNB → UE channel estimations, demodulates and obtain down from RN
Row data.It is eNB → UE channel estimations due to obtained, and eNB → UE channels and the RN → UE for being used for sending downlink data
Channel is differed, and UE is demodulated to the downlink data from RN using eNB → UE channel estimations, will be possible to lose
Very.Consideration the following two kinds situation：
1.RN does not send CRS：
As shown in Fig. 1 (a), RN101 does not send CRS, but transmission data (as shown by the solid line) between UE103, and corresponds to
ENB102 send CRS (shown in dotted line), but do not transmit data between UE103.Correspondingly, UE103 is received from eNB102
CBS, for carrying out channel estimation, and from RN101 receiving datas.It is eNB → UE channel estimations due to obtained, and the eNB →
UE channels are likely to be differed with the RN → UE channels for sending downlink data, and UE103 is estimated using eNB → UE channels
Count to be demodulated the downlink data from RN101, distortion will be possible to.
2.RN sends CRS identicals CRS sent with corresponding eNB：
As shown in Fig. 1 (b), RN101 and corresponding eNB102 sends identical CRS (shown in dotted line), and RN101
Transmission data (as shown by the solid line) also between UE103.Correspondingly, UE103 is from RN101 receiving datas, and from RN101 and
ENB102 receives CRS.Now, UE103 obtains eNB → UE and NB → UE by the combination CRS received from eNB102 and RN101
Aggregate channel estimate.It is that aggregate channel is estimated due to obtained, having very much with the RN → UE channels for sending downlink data can
Can differ, UE103 estimates to be demodulated the downlink data from RN101 using aggregate channel, will be possible to
Distortion.
Accordingly, it would be desirable to a kind of scheme, it is not necessary to make any change to user terminal, it is possible to user terminal is used
The channel estimation that can be obtained, correctly demodulates the data of reception.
Content of the invention
According to an aspect of the present invention, it is proposed that one kind is used for enabling user terminal correct in mobile communication system
The method of the data that ground demodulation is received, wherein described data are sent by second channel or are sent out by the first channel and second channel
Send, and the user terminal can only obtain first channel estimation or the aggregate channel of the first channel and second channel is estimated
Meter, methods described include：Before the data are sent by second channel, to market demand puppet channel precoding, so as to
The user terminal is estimated, correctly using the aggregate channel of the first channel estimation or the first channel and second channel
The data that demodulation is received.
According to another aspect of the invention, it is proposed that a kind of for enabling user terminal correct in mobile communication system
The network entity of the data that ground demodulation is received, wherein described data are sent by second channel or by the first channel and the second letter
Road sends, and the user terminal can only obtain the aggregate channel of first channel estimation or the first channel and second channel
Estimate, the network entity includes：Pseudo- channel pre-coding apparatus, for before the data are sent by second channel, to institute
Market demand puppet channel precoding is stated, so that the user terminal can use the first channel estimation or the first channel and the
The aggregate channel estimation of two channels, correctly demodulates the data of reception.
It is not necessary according to the invention that making any change to user terminal, it is possible to which user terminal is used can obtain
The channel estimation for obtaining, correctly demodulates the data of reception.
Description of the drawings
By the explanation below in conjunction with accompanying drawing, and with the more comprehensively understanding to the present invention, other objects of the present invention
Will become clearer from effect and it can be readily appreciated that wherein：
Fig. 1 schematically shows the example of the environment that the present invention can be implemented within；
Fig. 2 is schematically shown according to the present invention for enabling user terminal in mobile communication system correctly
The block diagram of the network entity of the data that demodulation is received.
In all of above-mentioned accompanying drawing, identical label is represented with identical, similar or corresponding feature or function.
Specific embodiment
The specific embodiment of the present invention described in detail below.In the following description, in will be in conjunction with support Type II
After GSM describing the present invention.
However, it should be appreciated by those skilled in the art, the invention is not restricted to this, the present invention is applied to any other shifting
Dynamic communication system, in the GSM, data are sent by second channel or by the first channel and second channel
Send, and user terminal can only obtain first channel estimation or the aggregate channel of the first channel and second channel is estimated.
For example, in an embodiment of the invention, first channel is first base station to the descending of user terminal
Channel, the second channel are down channel of second base station to user terminal.
Again for example, in the further embodiment of the present invention, the GSM supports relaying, first letter
Road is down channel of the base station to user terminal, and the second channel is descending letter of the corresponding via node to user terminal
Road.
The core concept of the present invention is before data are sent by second channel, prelists to market demand puppet channel
Code, so that user terminal can use the first channel estimation or the aggregate channel of the first channel and second channel to estimate, just
The data of reception really are demodulated.
In Type II relaying framework definition, in order to cell edge throughput strengthens, RN does not send eNB associated there
CRS, but in order to cover extension, RN must send CRS identicals CRS that eNB associated there sends.
(1) cell edge throughput strengthens：
As shown in Fig. 1 (a), in order to cell edge throughput strengthens, using relaying.Wherein UE103 be located at eNB102 and
Under the covering of RN101.UE103 directly can receive control signal and CRS (shown in dotted line) from eNB102.RN101 need not
Send CRS.Transmission data (as shown by the solid line) between RN101 and UE103.Therefore, UE103 receives CRS from eNB102 and is used for believing
Road is estimated, and obtains data from RN101.
AssumeENB → UE channel estimations (the first channel estimation, eNB → UE are the first channel) are represented,Expression RN →
UE channel estimations (second channel estimates that RN → UE is second channel).
In this case, RN101 to the pseudo- channel precoding of the market demand isWhereinRepresent institute
State the inverse of second channel estimation.
As eNB102 sends CRS to UE103.Therefore, UE103 is obtained in that the first channel estimation.That is,
UE103 is obtained in thatTherefore, UE103 can pass through to control link,Notify to eNB102, and eNB102 can lead to
Control link is crossed,Notify to RN101.
AndCan so obtain, RN101 can obtain UE → RN channel estimations, and using channel heterogeneite, obtain RN
→ UE channel estimations, that is,
More specifically, it is assumed that in RN101, before not applying pseudo- channel precoding, signal to be sent is s, then application
The signal s ' sent to UE103 after pseudo- channel precoding is expressed as：
The signal obtained at so UE103 can be expressed as：
Wherein n represents noise.
As noted previously, as UE103 is obtained in thatTherefore, UE103 can correctly demodulate the signal r of reception, and
Primary signal s is obtained, that is, is usedIt is multiplied by r, it is possible to obtain s.
S can be matrix, and representing has the situation of many transmission antennas and/or reception antenna, and this
In the case of, the first channel and second channel include many subchannels, i.e. each transmission antenna is to including between each reception antenna
One subchannel；Certainly,S can also be single value, represent the situation of single antenna.
(2) extension is covered：
As shown in Fig. 1 (b), in order to cover extension, using relaying.UE103 can receive CRS (such as dotted line institute from eNB102
Show).In addition, RN101 is also required that sends CRS identicals CRS (shown in dotted line) sent with eNB.Additionally, RN101 and UE103
Between transmit data (as shown by the solid line).Therefore, UE103 receives combination CRS from eNB102 and RN101 and estimates for aggregate channel
Meter, and from RN101 receiving datas.
Here, using hypothesis described above and symbol.
In this case, RN101 to the pseudo- channel precoding of the market demand isWherein
Represent that the second channel is estimated inverse.
As eNB102 and RN101 send identical CRS to UE103.Therefore, UE103 be obtained in that the first channel and
The aggregate channel of second channel is estimated.That is, UE103 is obtained in thatTherefore, UE103 can pass through Quality Initiative
Road,Notify to eNB102, and eNB102 can pass through to control link,Notify to RN101.
AndCan so obtain, RN101 can obtain UE → RN channel estimations, and using channel heterogeneite, obtain RN
→ UE channel estimations, that is,
More specifically, it is assumed that in RN101, before not applying pseudo- channel precoding, signal to be sent is s, then application
The signal s ' sent to UE103 after pseudo- channel precoding is expressed as：
The signal obtained at so UE103 can be expressed as：
Wherein n represents noise.
As noted previously, as UE103 is obtained in thatTherefore, UE103 can correctly demodulate the signal r of reception,
And obtain primary signal s, that is, useIt is multiplied by r, it is possible to obtain s.
(3) cooperating relay
In this case, as shown in Fig. 1 (c), UE103 can receive CRS (shown in dotted line) from eNB102.And RN101
CRS is not sent.Additionally, transmission identical data (as shown by the solid line) between RN101 and eNB102 and UE103, to realize radio frequency
RF portfolio premiums.Therefore, UE103 receives CRS from eNB102 is used for channel estimation, and from RN101 and eNB102 receiving datas.
Here, using hypothesis described above and symbol.
In this case, RN101 to the pseudo- channel precoding of the market demand isWhereinRepresent institute
State the inverse of second channel estimation.
As eNB102 sends CRS to UE103.Therefore, UE103 is obtained in that the first channel estimation.That is,
UE103 is obtained in thatTherefore, UE103 can pass through to control link,Notify to eNB102, and eNB102 can be with
By controlling link,Notify to RN101.
AndCan so obtain, RN101 can obtain UE → RN channel estimations, and using channel heterogeneite, obtain RN
→ UE channel estimations, that is,
More specifically, it is assumed that in RN101, before not applying pseudo- channel precoding, signal to be sent is s, then application
The signal s ' sent to UE103 after pseudo- channel precoding is expressed as：
And in eNB102, it is not necessary to before transmitting data to market demand puppet channel precoding.
The signal obtained at so UE103 can be expressed as：
Wherein n represents noise, and α, β are the power factors of eNB102 and RN101.
As noted previously, as UE103 is obtained in thatTherefore, UE103 can correctly demodulate the signal r of reception, and
Primary signal s is obtained, that is, is usedIt is multiplied by r, it is possible to obtain s.
Fig. 2 is schematically shown according to the present invention for enabling user terminal in mobile communication system correctly
The block diagram of the network entity of the data that demodulation is received, wherein described data are sent by second channel or by the first channel and the
Two channels send, and the user terminal can only obtain the combination of first channel estimation or the first channel and second channel
Channel estimation.
As shown in Fig. 2 the network entity 200 includes pseudo- channel pre-coding apparatus 210, for being sent by second channel
Before the data, to market demand puppet channel precoding, so that the user terminal can be estimated using the first channel
The aggregate channel estimation of meter or the first channel and second channel, correctly demodulates the data of reception.
In an embodiment of the invention, also include obtaining device 220, estimate for obtaining the second channel.
For example, if the second channel is down channel, then can first obtain the up channel corresponding with the down channel
Channel estimation, and using channel heterogeneite, obtain the second channel and estimate.
In an embodiment of the invention, wherein described user terminal can only obtain first channel estimation, with
And include to the market demand to market demand puppet channel precodingWhereinRepresent first channel
Estimate, andRepresent that the second channel is estimated inverse.
In yet another embodiment of the present invention, wherein described user terminal can only obtain first channel and second
The aggregate channel of channel is estimated, and includes to the market demand to market demand puppet channel precodingWhereinRepresent that first channel and the aggregate channel of second channel are estimated, andRepresent
It is inverse that the second channel is estimated.
In an embodiment of the invention, first channel is down channel of the first base station to user terminal,
The second channel is down channel of second base station to user terminal.
In the further embodiment of the present invention, the GSM supports relaying, and first channel is base
Stand the down channel of user terminal, the second channel is down channel of the corresponding via node to user terminal.
In the further embodiment of the present invention, the wherein GSM supports Type II relaying, described the
One channel is down channel of the base station in 3GPP LTE-A to user terminal, and the second channel is that corresponding via node is arrived
The down channel of user terminal.
In the further embodiment of the present invention, wherein described first channel and second channel include many subchannels.
For example, in the case of having many transmission antennas and/or reception antenna, the first channel and second channel include many subchannels i.e.
Each transmission antenna between each reception antenna include a subchannel
In the further embodiment of the present invention, wherein the network entity is the mobile communication system for supporting Type II relaying
Via node in system.
It should be noted that in order that the present invention is easier to understand, above description is eliminated for those skilled in the art
For be known and for the present invention more specifically some ins and outs for being likely necessary of realization.
The purpose for providing the specification of the present invention is illustrated that and is described, rather than is used for exhaustive or is limited the invention to
For disclosed form.For one of ordinary skill in the art, many modifications and changes will be apparent from.
Therefore, it is the principle and its practical application in order to preferably explain the present invention to select and describe embodiment, and makes
Those of ordinary skill in the art understand that, on the premise of without departing from essence of the present invention, all modifications and change are each fallen within by right
Require within limited protection scope of the present invention.
Claims (11)
1. a kind of method of the data for enabling user terminal correctly demodulate reception in mobile communication system, wherein institute
State data to be sent to the user terminal by second channel or be sent to user's end by the first channel and second channel
End, and the user terminal can only obtain the first channel estimation or the aggregate channel of the first channel and second channel is estimated, institute
The method of stating includes：
Obtain second channel to estimate；
Sending the data by second channel to before the user terminal, to market demand puppet channel precoding, from
And the user terminal is estimated using the aggregate channel of the first channel estimation or the first channel and second channel, correctly
The data that ground demodulation is received；
Wherein include to market demand puppet channel precoding：
When the user terminal can only obtain first channel estimation, to the market demandWhereinTable
Show first channel estimation, andRepresent that the second channel is estimated inverse；Or
In the aggregate channel estimation that the user terminal can only obtain first channel and second channel, should to the data
WithWhereinRepresent that first channel and the aggregate channel of second channel are estimated, andTable
Show that the second channel is estimated inverse.
2. method according to claim 1, wherein described first channel is down channel of the first base station to user terminal,
The second channel is down channel of second base station to user terminal.
3. method according to claim 1, wherein described GSM support relaying, and first channel is base station
To the down channel of user terminal, the second channel is down channel of the corresponding via node to user terminal.
4. method according to claim 3, wherein described GSM support Type II relaying, first channel
It is down channel of the base station in 3GPP LTE-A to user terminal, the second channel is corresponding via node to user's end
The down channel at end.
5. method according to claim 1, wherein described first channel and second channel include many subchannels.
6. a kind of network entity of the data for enabling user terminal correctly demodulate reception in mobile communication system, its
Described in data the user terminal is sent to by second channel or the use is sent to by the first channel and second channel
Family terminal, and the user terminal can only obtain the first channel estimation or the aggregate channel of the first channel and second channel is estimated
Meter, the network entity include：
Device is obtained, for obtaining second channel estimation；
Pseudo- channel pre-coding apparatus, for sending the data to before the user terminal, to the number by second channel
According to the pseudo- channel precoding of application, so that the user terminal can use the first channel estimation or the first channel and the second letter
The aggregate channel estimation in road, correctly demodulates the data of reception；
Wherein, include to market demand puppet channel precoding：
When the user terminal can only obtain first channel estimation, to the market demandWhereinTable
Show first channel estimation, andRepresent that the second channel is estimated inverse；Or
In the aggregate channel estimation that the user terminal can only obtain first channel and second channel, should to the data
WithWhereinRepresent that first channel and the aggregate channel of second channel are estimated, andTable
Show that the second channel is estimated inverse.
7. network entity according to claim 6, wherein described first channel is first base station to the descending of user terminal
Channel, the second channel are down channel of second base station to user terminal.
8. network entity according to claim 6, wherein described GSM support that relaying, first channel are
Down channel of the base station to user terminal, the second channel are down channel of the corresponding via node to user terminal.
9. network entity according to claim 8, wherein described GSM support Type II relaying, described first
Channel is down channel of the base station in 3GPP LTE-A to user terminal, and the second channel is corresponding via node to using
The down channel of family terminal.
10. network entity according to claim 6, wherein described first channel and second channel include many subchannels.
11. network entities according to claim 6, the wherein network entity are the mobile communication systems for supporting Type II relaying
Via node in system.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/000464 WO2010124420A1 (en) | 2009-04-28 | 2009-04-28 | Method and network entity for enabling user terminals to demodulate data correctly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102318399A CN102318399A (en) | 2012-01-11 |
| CN102318399B true CN102318399B (en) | 2017-03-15 |
Family
ID=43031643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980156972.7A Active CN102318399B (en) | 2009-04-28 | 2009-04-28 | Enable the user terminal correctly method of demodulating data and network entity |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102318399B (en) |
| WO (1) | WO2010124420A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1883178A2 (en) * | 2006-07-28 | 2008-01-30 | Nortel Networks Limited | Space time block code communications with co-operative relays |
| CN101359950A (en) * | 2008-09-03 | 2009-02-04 | 中国科学技术大学 | Multi-antenna relay transmission method based on singular value decomposition close-to zero beam forming |
| CN101557249A (en) * | 2008-04-07 | 2009-10-14 | 上海贝尔阿尔卡特股份有限公司 | Method and device for controlling cooperative transmission of downlink signal in wireless communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141171B (en) * | 2006-09-08 | 2011-07-06 | 华为技术有限公司 | Radio communication device, system and method |
-
2009
- 2009-04-28 CN CN200980156972.7A patent/CN102318399B/en active Active
- 2009-04-28 WO PCT/CN2009/000464 patent/WO2010124420A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1883178A2 (en) * | 2006-07-28 | 2008-01-30 | Nortel Networks Limited | Space time block code communications with co-operative relays |
| CN101557249A (en) * | 2008-04-07 | 2009-10-14 | 上海贝尔阿尔卡特股份有限公司 | Method and device for controlling cooperative transmission of downlink signal in wireless communication system |
| CN101359950A (en) * | 2008-09-03 | 2009-02-04 | 中国科学技术大学 | Multi-antenna relay transmission method based on singular value decomposition close-to zero beam forming |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010124420A1 (en) | 2010-11-04 |
| CN102318399A (en) | 2012-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11916831B2 (en) | System for transmitting reference signal with information on state of channel | |
| JP6469786B2 (en) | Apparatus and method for supporting higher order multi-user multiple-input multiple-output operation for wireless communication systems | |
| US10886958B2 (en) | Over-the-air signal assisted interference cancellation or suppression | |
| US11071107B2 (en) | Control channel architecture with control information distributed over multiple subframes on different carriers | |
| KR101701899B1 (en) | 8-transmit antenna reference signal design for downlink communications in a wireless system | |
| US9065527B2 (en) | Relay station, base station and communication method | |
| US9071322B2 (en) | Enabling downlink transparent relay in a wireless communications network | |
| US20090207761A1 (en) | Fdd inband backhauling and method thereof | |
| CN104378148A (en) | Current device to device and cellular communication method and system | |
| CN102055689B (en) | Method, system and equipment for transmitting demodulation pilot frequency and demodulating channel on backhaul link | |
| CN102204136B (en) | Relay techniques suitable for user equipment in downlink | |
| KR101457707B1 (en) | Method for relaying of relay having multiple antenna in wireless communication system | |
| US8811517B2 (en) | Wireless communication system for a high-speed object that moves on a fixed path | |
| US20150341134A1 (en) | Signal processing apparatus and method | |
| CN102318399B (en) | Enable the user terminal correctly method of demodulating data and network entity | |
| CN108023720B (en) | Method and device for sending and obtaining reference signals | |
| CN115987361A (en) | Base band unit and method thereof and method of radio unit | |
| EP3307006A1 (en) | Signal transmission and demodulation method, device, and system | |
| CN104768166A (en) | Antenna calibration device and method applied to coordinated multiple-point transmission | |
| CN103428680A (en) | Method and device for enabling subordination base station to provide service | |
| CN117856839A (en) | Method and device for data transmission | |
| KR101434456B1 (en) | Filter-and-Forward transparent relay design method for QoS maximization in OFDM systems | |
| CN102449967A (en) | Mobile communication system and data transmission method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Pudong Jinqiao Ning Road, Shanghai, No. 388 Patentee after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong Jinqiao Ning Road, Shanghai, No. 388 Patentee before: Shanghai Alcatel-Lucent Co., Ltd. |