CN103312402B - Data transmission method, user terminal and the community that dynamic cell selects - Google Patents
Data transmission method, user terminal and the community that dynamic cell selects Download PDFInfo
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Abstract
The invention discloses data transmission method, user terminal and community that a kind of dynamic cell selects, wherein, the method includes: user receives the Physical Downlink Control Channel information that main Serving cell issues；User, according to Physical Downlink Control Channel information, receives optimal data and sends the community data sent and the demodulated reference signal using the cell ID of main Serving cell to generate；User uses the data that the demodulated reference signal demodulation of main Serving cell receives.Data transmission method, user terminal and the community that the dynamic cell of the present invention selects, optimal data sends community when sending data to user, the DMRS using main Serving cell sends, user uses the data that the DMRS demodulation of main Serving cell receives, decrease and former control channel needs notify the signaling procedure that user's optimal data sends cell index information, eliminate the flow process of descending control signaling format design, reduce the expense controlling signaling.
Description
Technical field
The present invention relates to communication technical field, in particular it relates to the transmission side data that dynamic cell selects
Method, user terminal and community.
Background technology
LTE-A (LTE-Advanced) system uses OFDMA (Orthogonal Frequency Division
Multiplexing Access, the multiple access of OFDM accesses) technology, the information of intra-cell users is held
It is loaded in mutually orthogonal different sub carrier, thus avoids the multi-access inference between intra-cell users.But,
OFDMA access mode itself does not possess the ability of suppression presence of intercell interference, therefore affects LTE-A
The interference of systematic function is essentially from the interference of neighbor cell, i.e. minizone.
In the conventional cellular systems of identical networking, the user of cell edge is by by neighbor cell signal
Interference, these serious interference limit service quality and the handling capacity of edge customer.If adjacent is multiple
Signal is launched to user jointly by cooperation in community, is suppressed by interference signal, it is possible to effectively drop
Low presence of intercell interference, improves the signal received signal to noise ratio of each user.
CoMP (Coordinated Multi Points, coordinate multipoint) transmission technology according between base station is
No shared user data, is divided into JP (joint processing, Combined Treatment) and CS/CB (Coordinated
Scheduling/Beamforming, cooperative scheduling/beam shaping) two types.User data in JP scheme
It is stored at multiple nodes of cooperation, then whether simultaneously participate in number of users according to multiple nodes of cooperation again
According to transmission be divided into JT (Joint transmission, combine transmission) and DCS (Dynamic cell selection,
Dynamic cell selects).DCS scheme dynamically selects some node as number of users in cooperation cell is gathered
According to sending node, other nodes are not involved in the transmission of user data.The program does not require that multiple cooperation is little
District sends user data simultaneously, it is not required that share the channel information between multiple communities, compared to JT scheme
The most simple.In DCS scheme, typically can select from cooperation cell is gathered a community to
User sends data, and network side needs to inform the user the cell information being selected to.If be selected to is little
District changes, then network side needs to inform the user the new cell information being selected to.Apply in reality
In, the community being selected to may frequently change, if network side to inform the user newly every time
The cell information being selected to, then can increase signaling consumption.
Summary of the invention
It is an object of the invention to the defect that signaling consumption is big that controls for existing DCS scheme, proposition one
Plant data transmission method, user terminal and community that dynamic cell selects.
For achieving the above object, according to an aspect of the invention, it is provided a kind of dynamic cell selects
Data transmission method.
The data transmission method that dynamic cell according to embodiments of the present invention selects, including:
User receives the Physical Downlink Control Channel information that main Serving cell issues；
User, according to Physical Downlink Control Channel information, receives optimal data and sends the data that community sends
With the demodulated reference signal using the cell ID of main Serving cell to generate；
User uses the data that the demodulated reference signal demodulation of main Serving cell receives.
In technique scheme, receive, user, the Physical Downlink Control Channel that main Serving cell issues
Also include before the step of information:
The reception power of user's measuring reference signals, it is thus achieved that Reference Signal Received Power information and/or reference
Signal receiving quality information；
User, according to Reference Signal Received Power information and/or Reference Signal Received Quality information, selects main
Serving cell.
In technique scheme, send, receiving optimal data, data and the main clothes of use that community sends
Also include before the step of the demodulated reference signal that the cell ID of business community generates:
User measures the channel quality of coordinate multipoint cooperation set Zhong Ge community, selects optimal data to send
Community, and report optimal data to send index information and the channel quality information of community.
In technique scheme, it is that optimal data transmission is little that optimal data sends the index information of community
The cell ID in district or the index information of the cooperation scene definition according to coordinate multipoint.
In technique scheme, user measures channel quality, selects optimal data to send the step of community
Suddenly specifically include:
User estimates the descending common reference channel of coordinate multipoint cooperation set Zhong Ge community, obtains each
The channel gain of community, and the community selecting channel gain maximum is that optimal data sends community；Or,
User estimates the descending common reference channel of coordinate multipoint cooperation set Zhong Ge community, travels through institute
There is code book, select optimum code book for each community, and the community selecting handling capacity maximum is optimum number
According to sending community.
In technique scheme, the demodulated reference signal demodulation of main Serving cell is used to receive user
Data step before also include:
User uses the mark of main Serving cell to generate demodulated reference signal, the demodulated reference signal of generation
It it is the demodulated reference signal of main Serving cell.
For achieving the above object, according to an aspect of the invention, it is provided another kind of dynamic cell is selected
The data transmission method selected.
The data transmission method that dynamic cell according to embodiments of the present invention selects, including:
The optimal data of main cell receiver reporting of user sends index information and the channel matter of community
Amount information；
Main Serving cell notice optimal data sends community and sends data to user；Main Serving cell to
Family sends Physical Downlink Control Channel information.
In technique scheme, Physical Downlink Control Channel information not including, optimal data sends
The index information of community.
In technique scheme, it is that optimal data transmission is little that optimal data sends the index information of community
The mark in district or the index information of the cooperation scene definition according to coordinate multipoint.
In technique scheme, also include:
Main Serving cell is that active user carries out resource distribution and calculates pre-coding matrix, resource is distributed
Information and pre-coding matrix are issued optimal data and are sent community.
For achieving the above object, according to an aspect of the invention, it is provided another kind of dynamic cell is selected
The data transmission method selected.
The data transmission method that dynamic cell according to embodiments of the present invention selects, including:
Optimal data sends community and receives the request sending data to user that main Serving cell sends；
Optimal data sends community and sends data and the demodulated reference signal of main Serving cell to user.
In technique scheme, send data in optimal data transmission community to user and main service is little
Also include before the step of the demodulated reference signal in district: optimal data sends community and uses main Serving cell
Mark generate demodulated reference signal, the demodulated reference signal of generation is the demodulation reference of main Serving cell
Signal.
In technique scheme, send data in optimal data transmission community to user and main service is little
Also include before the step of the demodulated reference signal in district:
Optimal data sends community and obtains resource allocation information and the precoding square that main Serving cell provides
Battle array；
Optimal data sends community and uses pre-coding matrix respectively to data and the demodulation of main Serving cell
Reference signal is weighted；
Optimal data transmission community sends the demodulated reference signal of data and main Serving cell to user
Step specifically includes: optimal data sends community and sends process in the resource that resource allocation information indicates
Data after pre-coding matrix weighting and the demodulated reference signal of main Serving cell.
In technique scheme, optimal data send community receive main Serving cell send to
Also include after the step of the request that family sends data:
Optimal data sends community and judges whether that what the main Serving cell of response sent sends data to user
Request；
If response, then send to main Serving cell and confirm message, otherwise, then send out to main Serving cell
Send refuse information.
For achieving the above object, according to another aspect of the present invention, it is provided that the choosing of a kind of dynamic cell
The user terminal selected.
The user terminal that dynamic cell according to embodiments of the present invention selects, including:
Information receiving module, for receiving the Physical Downlink Control Channel information that main Serving cell issues；
Data reception module, for according to Physical Downlink Control Channel information, receives optimal data and sends
The data that community sends and the demodulated reference signal using the cell ID of main Serving cell to generate；
Data demodulation module, for the number using the demodulated reference signal demodulation of main Serving cell to receive
According to.
In technique scheme, user terminal also includes:
Information acquisition module, for the reception power of measuring reference signals, it is thus achieved that reference signal receives merit
Rate information and/or Reference Signal Received Quality information；
Cell selection module, for receiving matter according to Reference Signal Received Power information and/or reference signal
Amount information, selects main Serving cell.
In technique scheme, user terminal also includes:
Select reporting module, for measuring the channel quality of coordinate multipoint cooperation set Zhong Ge community, choosing
Select optimal data and send community, and report optimal data to send index information and the channel quality letter of community
Breath.
In technique scheme, reporting module is selected to specifically include:
First selects submodule, for estimating the descending public of coordinate multipoint cooperation set Zhong Ge community
Reference channel, obtains the channel gain of each community, and the community selecting channel gain maximum is optimum number
According to sending community；Or,
Second selects submodule, for estimating the descending public of coordinate multipoint cooperation set Zhong Ge community
Reference channel, travels through all code books, selects optimum code book for each community, and selects handling capacity
Big community is that optimal data sends community.
For achieving the above object, according to another aspect of the present invention, it is provided that the choosing of a kind of dynamic cell
The main Serving cell selected.
The main Serving cell that dynamic cell according to embodiments of the present invention selects, including:
Information receiving module, sends the index information of community for receiving the optimal data of reporting of user
And channel quality information；
Data notification module, is used for notifying that optimal data sends community and sends data to user；
Information sending module, for sending Physical Downlink Control Channel information to user.
In technique scheme, main Serving cell also includes:
Distribution computing module, for carrying out resource distribution for active user and calculating pre-coding matrix, will
Resource allocation information and pre-coding matrix are issued optimal data and are sent community.
For achieving the above object, according to another aspect of the present invention, it is provided that the choosing of a kind of dynamic cell
The optimal data selected sends community.
The optimal data that dynamic cell according to embodiments of the present invention selects sends community, including:
Request receiver module, for receiving the request sending data to user that main Serving cell sends；
Data transmission blocks, for sending data and the demodulated reference signal of main Serving cell to user.
In technique scheme, optimal data sends community and also includes:
Information acquisition module, for obtaining resource allocation information and the precoding square that main Serving cell provides
Battle array；
Matrix weights module, for using pre-coding matrix respectively to data and the demodulation of main Serving cell
Reference signal is weighted；
Described data transmission blocks, passes through specifically for sending in the resource that resource allocation information indicates
Data after pre-coding matrix weighting and the demodulated reference signal of main Serving cell.In technique scheme
In, optimal data sends community and also includes:
Response judge module, for judging whether that what the main Serving cell of response sent sends data to user
Request；
Response sending module, for according to whether the result of response, sends message to main Serving cell:
If response, then send to main Serving cell and confirm message, otherwise, then send to main Serving cell and refuse
Message absolutely.
Data transmission method, user terminal and the community that the dynamic cell of various embodiments of the present invention selects,
Optimal data sends the DMRS that community is main Serving cell to the DMRS that user sends, and user makes
Demodulate the data received with the DMRS of main Serving cell, decrease in former control channel and need to notify user
Optimal data sends the signaling procedure of cell index information, eliminates descending control signaling format design
Flow process, reduces the expense controlling signaling；For a user, it is transparent that data send, equivalent
In receiving data from main serving BS.
Other features and advantages of the present invention will illustrate in the following description, and, partly from
Description becomes apparent, or understands by implementing the present invention.The purpose of the present invention and its
His advantage can be by knot specifically noted in the description write, claims and accompanying drawing
Structure realizes and obtains.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, with
Embodiments of the invention are used for explaining the present invention together, are not intended that limitation of the present invention.At accompanying drawing
In:
Fig. 1 is the flow chart of the data transmission method embodiment one selected according to dynamic cell of the present invention；
Fig. 2 is the structural representation of the data transmission method embodiment two selected according to dynamic cell of the present invention
Figure；
Fig. 3 is the flow chart of the data transmission method embodiment two selected according to dynamic cell of the present invention；
Fig. 4 is the user terminal schematic diagram that the dynamic cell according to the embodiment of the present invention selects；
Fig. 5 is the main Serving cell schematic diagram that the dynamic cell according to the embodiment of the present invention selects；
Fig. 6 is that the optimal data that the dynamic cell according to the embodiment of the present invention selects sends community signal
Figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated, it will be appreciated that this place is retouched
The preferred embodiment stated is merely to illustrate and explains the present invention, is not intended to limit the present invention.
Embodiment of the method
The inventive method embodiment one provides the data transmission method that a kind of dynamic cell selects, such as figure
Shown in 1, the present embodiment includes:
Step 102: user selects main Serving cell；
Step 104: the channel quality of the cooperation set Zhong Ge community of user periodic measurement CoMP, choosing
Select optimal data and send community, and optimal data is sent the index information of community and channel quality reports
Main Serving cell；
Step 106: after postponing at one section, main Serving cell receives the optimal data of reporting of user and sends little
The index information in district and channel quality, notice optimal data sends community and sends data to user, and to
Family sends PDCCH (Physical Downlink Control Channel) information, and instruction current time optimal data sends community
Index information, wherein, main Serving cell notify to user optimal data send community index information
It is not necessarily the index information of the optimal data transmission community that user self reports；
Step 108: optimal data sends community and uses DMRS (the Demodulation Reference of self
Signals, demodulated reference signal) send data to user；
Step 110: user uses optimal data to send the DMRS demodulating data of community.
The data transmission method that the dynamic cell of this method embodiment one selects, controls channel by main service
Community sends, and data channel is sent community by optimal data and sends, it is ensured that the optimum biography of data transmission
Defeated effect.
The inventive method embodiment two provides the data transmission method that another kind of dynamic cell selects, as
Shown in Fig. 2, the overall thought of the present embodiment is: the control channel of user is sent by main Serving cell,
Data channel is sent community (i.e. TPoptimal) by optimal data and sends, but DMRS still uses
The sequence of main Serving cell
Therefore, for user, the transmission of data is transparent,
I.e. it can be understood as data are still sent by main Serving cell from the point of view of user side.In Fig. 2, UE1's
Main Serving cell is TP1, and it is TP2 that optimal data sends community, then the DMRS of this user selects
The sequence of TP1
Same, the main Serving cell of UE2 is TP2, and optimal data sends little
District is TP1, then the sequence of the DMRS selection TP2 of this user is
It should be noted that y can (Nx ID), wherein, y represents the clothes that DMRS, f are independent variable N
The ordinal function of business cell x, the subscript x of N represents the Serving cell title of f function, and subscript ID represents
The cell ID of Serving cell x；That is, DMRS is the function of cell ID (i.e. cell ID).
As it is shown on figure 3, the flow process that implements of the present embodiment is:
Step 202: user selects main Serving cell ServCell；
Specifically, user is when carrying out community selection or gravity treatment, according to measured downlink reference signal
Receive power, it is thus achieved that Reference Signal Received Power (RSRP, reference signal received power,
Reference Signal Received Power) information and/or Reference Signal Received Quality (RSRQ, reference signal
Received quality, Reference Signal Received Quality) information, wherein, Reference Signal Received Quality=be
Number a × useful Reference Signal Received Power/all Reference Signal Received Power, connect further according to reference signal
Receive power information and/or Reference Signal Received Quality information, select main Serving cell；
Step 204: user presses some cycles and measures the channel quality of CoMP cooperation set Zhong Ge community,
Select optimal data to send community (TPoptimal), and report optimal data to send to main Serving cell
The index information (Index) of community and channel quality information CQI (Channel quality indicator,
CQI)；
It should be noted that the Index of TPoptimal can be the cell ID of TPoptimal, also
Can be a kind of Index newly defined for cooperation scene；
In step 204, according to channel quality select optimal data send community method include but not
It is limited to:
Channel gain method: user estimates the descending common reference letter of CoMP cooperation set Zhong Ge community
Road, obtains the channel gain of each community, and the community selecting channel gain maximum is that optimal data sends
Community；
Handling capacity rule for the treatment of: user estimates the descending common reference of CoMP cooperation set Zhong Ge community
Channel, travels through all code books, selects optimum code book for each community, and selects handling capacity maximum
Community be optimal data send community；Wherein, this code book is for using codebook based
Under precoding transmission mode, the precoding codebook set of system definition；
Step 206: main Serving cell is user's allocation of downlink resource and determines pre-coding matrix；
Step 208: the certain delay of main Serving cell experience receives the optimal data transmission community reported (i.e.
TPoptimal), after Index, notice optimal data sends community and sends data to user, and will money
Source distribution information and pre-coding matrix are issued optimal data and are sent community；
It should be noted that main Serving cell receives the optimal data transmission community reported in step 208
The optimal data that (i.e. TPoptimal) sends data with main Serving cell notice for active user sends
Community may be different transmission community, and main Serving cell can be revised or garbled-reception reporting of user
Optimal data send community, result that main Serving cell is measured or the demand of self further according to self
Selecting optimal data to send community is that active user sends data.
In a step 208, can be that main Serving cell passes through X2 interface, by information notification optimum number
According to sending community, it is also possible to turned by central authorities' IWU (being used for being managed collectively multiple cooperation cell)
Send out this information；
After step 210:TPoptimal obtains resource allocation information and pre-coding matrix, use precoding
Matrix to needing to issue the DMRS weighting of the data of user and main Serving cell, distributes in resource respectively
The data after pre-coding matrix weights and main Serving cell is sent in the resource of information instruction
DMRS, wherein, the DMRS of main Serving cell is the index that TPoptimal utilizes main Serving cell
The DMRS that information generates；
Step 212: main Serving cell is that user sends PDCCH (physical downlink control
Channel, Physical Downlink Control Channel), TPoptimal is that user sends data；
In the step 212, TPoptimal is that user sends in data procedures, and DMRS selects main clothes
The sequence of business community
Thus need not notify that user's optimal data sends the index letter of community
Breath, user only utilizes the DMRS of main Serving cell can be properly received data.
Step 214: user utilizes the DMRS of main Serving cell
Complete connecing of data channel
Receive；Specifically, after user obtains the cell ID of main Serving cell, according to y=f (Nx ID) formula can
To calculate to obtain DMRS.That is, user utilizes the cell ID of main Serving cell to generate DMRS, generation
DMRS is the DMRS of main Serving cell, and user utilizes the DMRS of main Serving cell to demodulate
The data that TPoptimal sends.
The data transmission method that the dynamic cell of this method embodiment two selects, with embodiment of the method one phase
Ratio, its difference is, (1) in the step 212, the PDCCH that main Serving cell sends to user
Do not necessarily indicate that optimal data sends the index information of community；(2) in step 210, optimal data
Sending community utilizes the cell ID of main Serving cell to generate DMRS, i.e. generates main Serving cell
DMRS, is the DMRS of main Serving cell to the DMRS of user's transmission；(3) in step 214
In, user uses the DMRS demodulating data that the cell ID according to main Serving cell generates.Need
Bright, main Serving cell sends the step of PDCCH to user, with main Serving cell notice optimum
Data send community and send data to user and resource allocation information and pre-coding matrix are issued optimum
The sequencing relation of certainty is not had between the step of data transmission community.
By above-mentioned difference it can be seen that the data transmission method that selects of the dynamic cell of the present embodiment,
Excellent data send community and send data to user and use the cell ID of main Serving cell to generate
DMRS, user uses the data that the DMRS demodulation of main Serving cell receives, and decreases former control and believes
Road needs notify the signaling procedure that user's optimal data sends cell index information, eliminate descending control
The flow process of signaling format design, reduces the expense controlling signaling；For a user, data send
It is transparent, is equal to receive data from main serving BS.
For ease of the technical scheme of those skilled in the art more thorough explanation the application, existing to upper
State embodiment of the method two to be further described, as shown in following embodiment of the method three, four, five,
Respectively from user side, main Serving cell side, optimal data send cell side be described in detail.
The inventive method embodiment three provides the data transmission method that another kind of dynamic cell selects, this
Embodiment mainly carrys out the flow process that realizes of illustration method with user side, and the present embodiment includes:
Step 302: user measures downlink reference signal and receives power, it is thus achieved that Reference Signal Received Power
Information and/or Reference Signal Received Quality information, and according to Reference Signal Received Power information and/or ginseng
Examine signal receiving quality information, select main Serving cell；
Step 304: user measures the channel quality of CoMP cooperation set Zhong Ge community, selects optimum
Data send community (TPoptimal), and report optimal data to send the rope of community to main Serving cell
(i.e. CQI, with MCS (Modulation and Coding for fuse breath (Index) and channel quality information
Scheme, modulating-coding form) represent)；
It should be noted that the Index of TPoptimal can be the cell ID of TPoptimal, it is possible to
To be a kind of Index newly defined for cooperation scene；
In step 304, the method selecting optimal data to send community according to channel quality includes:
Channel gain method: user estimates the descending common reference letter of CoMP cooperation set Zhong Ge community
Road, obtains the channel gain of each community, and the community selecting channel gain maximum is that optimal data sends
Community；
Handling capacity rule for the treatment of: user estimates the descending common reference of CoMP cooperation set Zhong Ge community
Channel, travels through all code books, selects optimum code book for each community, and selects handling capacity maximum
Community is that optimal data sends community；
Step 306: user receives the PDCCH that main Serving cell sends, obtains MCS grade and money
Source distribution condition；
Step 308: user receives the data that TPoptimal sends, and uses main Serving cell
DMRS demodulates the data received, and the DMRS of main Serving cell is that user is according to main Serving cell
Cell ID generate DMRS.It addition, the resource allocation information indication that user carries at PDCCH
The data that TPoptimal sends are received in the resource shown.
The inventive method embodiment four provides the data transmission method that another kind of dynamic cell selects, this
Embodiment mainly carrys out the flow process that realizes of illustration method with main Serving cell side, and the present embodiment includes:
Step 402: main Serving cell sends public reference signal；
Step 404: the optimal data of main cell receiver user feedback sends community (i.e.
TPoptimal) index information (i.e. Index) and channel quality information CQI；
In step 404, before non-selected optimal data sends community, above-mentioned CQI is main service
The CQI of community, after selecting optimal data to send community, above-mentioned CQI is that optimal data transmission is little
The CQI in district；
Step 406: main Serving cell is that active user carries out resource distribution and calculates pre-coding matrix；
Step 408: main Serving cell notice TPoptimal is that active user sends data, and to
Family sends resource allocation information and pre-coding matrix, so that TPoptimal uses pre-coding matrix respectively
To needing the DMRS issuing the data of user and main Serving cell to be weighted, and at resource distribution letter
Data after user sends weighting and the DMRS of main Serving cell in the resource of breath instruction, wherein,
The DMRS of main Serving cell is that TPoptimal uses the index information of main Serving cell to generate
DMRS；
It should be noted that the premise that the present invention realizes is to be provided with collaborative network, net between multiple community
Each cell ID of network side be all it is known that therefore in a step 408, main Serving cell notice TPoptimal
When sending data for active user, be not required to notify the cell ID of main Serving cell to
TPoptimal；
Step 410: main Serving cell sends PDCCH to user.
The inventive method embodiment five provides the data transmission method that another kind of dynamic cell selects, this
Embodiment mainly sends cell side with optimal data and comes the flow process that realizes of illustration method, the present embodiment bag
Include:
Step 502: optimal data sends community and sends public reference signal；
Step 504: optimal data send community receive come autonomous Serving cell send data to user
Request；
Step 506: optimal data sends community according to self loading condition or network quality situation etc.
Judge whether to receive this data sending request, such as, if own load is heavier, the most do not receive data
Send request, if own load is relatively light, then receive data sending request；
Step 508: optimal data sends community and sends message authentication or refusal to main Serving cell；
Step 510: after message authentication, optimal data sends community and utilizes the ID of main Serving cell raw
Become the DMRS of main Serving cell, and send data and the DMRS of main Serving cell to user.
It should be noted that optimal data sends community sends data and main Serving cell to user
Before DMRS, it is possible to obtain the resource allocation information of main Serving cell offer and pre-coding matrix, and
Use pre-coding matrix respectively to needing the DMRS issuing the data of user and main Serving cell to carry out
Weighting, afterwards, the data after user sends weighting and master in the resource of resource allocation information instruction
The DMRS of Serving cell.
Device embodiment
According to embodiments of the present invention, it is provided that the user terminal that a kind of dynamic cell selects.Such as Fig. 4 institute
Showing, the present embodiment includes:
Information receiving module 11, for receiving the Physical Downlink Control Channel letter that main Serving cell issues
Breath；
Data reception module 12, for according to Physical Downlink Control Channel information, receives optimal data and sends out
The data sending community to send and the demodulated reference signal using the cell ID of main Serving cell to generate；
Data demodulation module 13, for the number using the demodulated reference signal demodulation of main Serving cell to receive
According to.
The present embodiment also includes:
Information acquisition module 14, for the reception power of measuring reference signals, it is thus achieved that reference signal receives
Power information and/or Reference Signal Received Quality information；
Cell selection module 15, for connecing according to Reference Signal Received Power information and/or reference signal
Receive quality information, select main Serving cell；
Select reporting module 16, for measuring the channel quality of coordinate multipoint cooperation set Zhong Ge community,
Select optimal data to send community, and report optimal data to send index information and the channel quality of community
Information.
Wherein: select reporting module 16 to specifically include:
First selects submodule 161, for estimating the descending of coordinate multipoint cooperation set Zhong Ge community
Common reference channel, obtains the channel gain of each community, and the community selecting channel gain maximum is
Excellent data send community；Or,
Second selects submodule 162, for estimating the descending of coordinate multipoint cooperation set Zhong Ge community
Common reference channel, travels through all code books, selects optimum code book for each community, and selects to handle up
The community of amount maximum is that optimal data sends community.
According to embodiments of the present invention, it is provided that the main Serving cell that a kind of dynamic cell selects.Such as Fig. 5
Shown in, the present embodiment includes:
Information receiving module 21, sends the index letter of community for receiving the optimal data of reporting of user
Breath and channel quality information；
Data notification module 22, is used for notifying that optimal data sends community and sends data to user；
Information sending module 23, for sending Physical Downlink Control Channel information to user.
The present embodiment also includes:
Distribution computing module 24, for carrying out resource distribution for active user and calculating pre-coding matrix,
Resource allocation information and pre-coding matrix are issued optimal data and sends community.
According to embodiments of the present invention, it is provided that the optimal data that a kind of dynamic cell selects sends community.
As shown in Figure 6, the present embodiment includes:
Request receiver module 31, for receive main Serving cell send to user send data please
Ask；
Data transmission blocks 32, for sending the demodulation of data and main Serving cell with reference to letter to user
Number.
Optimal data sends community and also includes:
Information acquisition module 35, for obtaining resource allocation information and the precoding that main Serving cell provides
Matrix；
Matrix weights module 36, for using pre-coding matrix respectively to data and the solution of main Serving cell
Tune reference signal is weighted；
Data transmission blocks 32, specifically for sending through pre-in the resource that resource allocation information indicates
Data after encoder matrix weighting and the demodulated reference signal of main Serving cell；Response judge module 33,
For judging whether the request sending data to user that the main Serving cell of response sends；
Response sending module 34, for according to whether the result of response, sends message to main Serving cell:
If response, then send to main Serving cell and confirm message, otherwise, then send to main Serving cell and refuse
Message absolutely.
The user terminal that the dynamic cell of above example selects, main Serving cell and optimal data send
Community, optimal data transmission community, when sending data to user, uses the DMRS of main Serving cell
Sending, user uses the data that the DMRS demodulation of main Serving cell receives, and decreases former control channel
Middle need notify that user's optimal data sends the signaling procedure of cell index information, eliminate descending control and believe
Make the flow process of format design, reduce the expense controlling signaling；For a user, data send and are
Transparent, it is equal to receive data from main serving BS.
One of ordinary skill in the art will appreciate that: realize all or part of step of said method embodiment
Suddenly can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer
In read/write memory medium, this program upon execution, performs to include the step of said method embodiment；
And aforesaid storage medium includes: ROM, RAM, magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, it is not used to
Limit the present invention, although the present invention being described in detail with reference to previous embodiment, for ability
For the technical staff in territory, the technical scheme described in foregoing embodiments still can be repaiied by it
Change, or wherein portion of techniques feature is carried out equivalent.All the spirit and principles in the present invention it
In, any modification, equivalent substitution and improvement etc. made, should be included in protection scope of the present invention
Within.
Claims (18)
1. the data transmission method that a dynamic cell selects, it is characterised in that including:
User receives the Physical Downlink Control Channel information that main Serving cell issues；
User, according to described Physical Downlink Control Channel information, receives optimal data and sends what community sent
The demodulated reference signal that the cell ID of data and the main Serving cell of use generates；
User uses the data that the demodulated reference signal demodulation of main Serving cell receives；
Described user receive the Physical Downlink Control Channel information that main Serving cell issues step it
Before also include:
The reception power of user's measuring reference signals, it is thus achieved that Reference Signal Received Power information and/or reference
Signal receiving quality information；
Described user is according to Reference Signal Received Power information and/or Reference Signal Received Quality information, choosing
Select main Serving cell；
The data that community sends and the cell ID using main Serving cell is sent receiving optimal data
Also include before the step of the demodulated reference signal generated:
User measures the channel quality of coordinate multipoint cooperation set Zhong Ge community, selects optimal data to send
Community, and report optimal data to send index information and the channel quality information of community.
Method the most according to claim 1, it is characterised in that described optimal data sends community
Index information be that described optimal data sends the cell ID of community or according to the cooperation of coordinate multipoint
The index information of scene definition.
Method the most according to claim 1, it is characterised in that user measures channel quality, choosing
The step selecting optimal data transmission community specifically includes:
User estimates the descending common reference channel of coordinate multipoint cooperation set Zhong Ge community, obtains each
The channel gain of community, and the community selecting channel gain maximum is that optimal data sends community；Or,
User estimates the descending common reference channel of coordinate multipoint cooperation set Zhong Ge community, travels through institute
There is code book, select optimum code book for each community, and the community selecting handling capacity maximum is optimum number
According to sending community.
Method the most according to claim 1, it is characterised in that use main Serving cell user
Demodulated reference signal demodulation receive data step before also include:
User uses the mark of main Serving cell to generate demodulated reference signal, the demodulation reference of described generation
Signal is the demodulated reference signal of main Serving cell.
5. the data transmission method that a dynamic cell selects, it is characterised in that
The optimal data of main cell receiver reporting of user sends index information and the channel matter of community
Amount information；
Described main Serving cell notice optimal data sends community and sends data to user；
Described main Serving cell sends Physical Downlink Control Channel information to user, for user according to
Described Physical Downlink Control Channel information, receives optimal data and sends the data of community transmission and use main
The demodulated reference signal that the cell ID of Serving cell generates, and use the demodulation reference of main Serving cell
The data that signal demodulation receives；
Described Physical Downlink Control Channel information not including, optimal data sends the index letter of community
Breath；
Described main Serving cell is according to Reference Signal Received Power information and/or Reference Signal Received Quality
Information selects；
Described optimal data sends community and presses the letter of some cycles measurement CoMP cooperation set Zhong Ge community
Road quality selects.
Method the most according to claim 5, it is characterised in that described optimal data sends community
Index information be that described optimal data sends the mark of community or according to the cooperation scene of coordinate multipoint
The index information of definition.
7. according to the method described in claim 5 or 6, it is characterised in that also include: described main clothes
Business community is that active user carries out resource distribution and calculates pre-coding matrix, by resource allocation information with pre-
Encoder matrix is issued optimal data and is sent community.
8. the data transmission method that a dynamic cell selects, it is characterised in that including:
Optimal data sends community and receives the request sending data to user that main Serving cell sends；
Described optimal data sends community and sends the demodulation of data and main Serving cell with reference to letter to user
Number；
Send community in described optimal data and send the demodulation reference of data and main Serving cell to user
Also include before the step of signal: described optimal data sends community and uses the mark life of main Serving cell
Becoming demodulated reference signal, the demodulated reference signal of described generation is that the demodulation of main Serving cell is with reference to letter
Number；
Described main Serving cell is according to Reference Signal Received Power information and/or Reference Signal Received Quality
Information selects；
Described optimal data sends community and presses the letter of some cycles measurement CoMP cooperation set Zhong Ge community
Road quality selects.
Method the most according to claim 8, it is characterised in that send little in described optimal data
Also include before the step of the demodulated reference signal that district sends data and main Serving cell to user:
Described optimal data sends community and obtains the resource allocation information of main Serving cell offer and prelist
Code matrix；
Described optimal data sends community and uses pre-coding matrix respectively to data and main Serving cell
Demodulated reference signal is weighted；
Described optimal data sends community and sends the demodulation of data and main Serving cell with reference to letter to user
Number step specifically include: described optimal data send community in the resource that resource allocation information indicates
Send the data after pre-coding matrix weights and the demodulated reference signal of main Serving cell.
Method the most according to claim 8, it is characterised in that send community in optimal data
Also include after receiving the step of the request sending data to user that main Serving cell sends:
Described optimal data send that community judges whether that response main Serving cell sends to user's transmission
The request of data；
If response, then send to described main Serving cell and confirm message, otherwise, then to described main clothes
Business community sends refuse information.
The user terminal that 11. 1 kinds of dynamic cells select, it is characterised in that including:
Information receiving module, for receiving the Physical Downlink Control Channel information that main Serving cell issues；
Data reception module, for according to described Physical Downlink Control Channel information, receives optimal data
Send the community data sent and the demodulated reference signal using the cell ID of main Serving cell to generate；
Data demodulation module, for using the demodulated reference signal demodulation of described main Serving cell to receive
Data；
Described main Serving cell is according to Reference Signal Received Power information and/or Reference Signal Received Quality
Information selects；
Described optimal data sends community and presses the letter of some cycles measurement CoMP cooperation set Zhong Ge community
Road quality selects.
12. user terminals according to claim 11, it is characterised in that also include:
Information acquisition module, for the reception power of measuring reference signals, it is thus achieved that reference signal receives merit
Rate information and/or Reference Signal Received Quality information；
Cell selection module, for receiving matter according to Reference Signal Received Power information and/or reference signal
Amount information, selects main Serving cell.
13. user terminals according to claim 11, it is characterised in that also include:
Select reporting module, for measuring the channel quality of coordinate multipoint cooperation set Zhong Ge community, choosing
Select optimal data and send community, and report optimal data to send index information and the channel quality letter of community
Breath.
14. user terminals according to claim 13, it is characterised in that described selection reports
Module specifically includes:
First selects submodule, for estimating the descending public of coordinate multipoint cooperation set Zhong Ge community
Reference channel, obtains the channel gain of each community, and the community selecting channel gain maximum is optimum number
According to sending community；Or,
Second selects submodule, for estimating the descending public of coordinate multipoint cooperation set Zhong Ge community
Reference channel, travels through all code books, selects optimum code book for each community, and selects handling capacity
Big community is that optimal data sends community.
The main Serving cell that 15. 1 kinds of dynamic cells select, it is characterised in that including:
Information receiving module, sends the index information of community for receiving the optimal data of reporting of user
And channel quality information；
Data notification module, is used for notifying that optimal data sends community and sends data to user；
Information sending module, for sending Physical Downlink Control Channel information to user；
Also include:
Distribution computing module, for carrying out resource distribution for active user and calculating pre-coding matrix, will
Resource allocation information and pre-coding matrix are issued optimal data and are sent community；
Described main Serving cell is according to Reference Signal Received Power information and/or Reference Signal Received Quality
Information selects；
Described optimal data sends community user and presses some cycles measurement CoMP cooperation set Zhong Ge community
Channel quality select.
The optimal data transmission community that 16. 1 kinds of dynamic cells select, it is characterised in that including:
Request receiver module, for receiving the request sending data to user that main Serving cell sends；
Data transmission blocks, for sending data and the demodulated reference signal of main Serving cell to user；
Described main Serving cell is according to Reference Signal Received Power information and/or Reference Signal Received Quality
Information selects；
Described optimal data sends community and presses the letter of some cycles measurement CoMP cooperation set Zhong Ge community
Road quality selects；
Described demodulated reference signal is the mark that described optimal data sends the main Serving cell of community use
Generating, the demodulated reference signal of described generation is the demodulated reference signal of main Serving cell.
17. optimal data according to claim 16 send community, it is characterised in that also wrap
Include:
Information acquisition module, for obtaining resource allocation information and the precoding square that main Serving cell provides
Battle array；
Matrix weights module, for using pre-coding matrix respectively to data and the demodulation of main Serving cell
Reference signal is weighted；
Described data transmission blocks, passes through specifically for sending in the resource that resource allocation information indicates
Data after pre-coding matrix weighting and the demodulated reference signal of main Serving cell.
18. send community according to the optimal data described in claim 16 or 17, it is characterised in that
Also include:
Response judge module, for judging whether that what the main Serving cell of response sent sends data to user
Request；
Response sending module, for according to whether the result of response, sends message to main Serving cell:
If response, then send to described main Serving cell and confirm message, otherwise, then little to described main service
District sends refuse information.
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| CN105636222B (en) | 2014-11-06 | 2019-04-02 | 电信科学技术研究院 | A kind of data channel scheduling method, apparatus and system |
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| CN101895940A (en) * | 2010-07-26 | 2010-11-24 | 北京邮电大学 | Method for distributing resources between main service cell and coordinate cells |
| CN102378242A (en) * | 2010-08-10 | 2012-03-14 | 中兴通讯股份有限公司 | Method and device for generating optimal cell list during carrier aggregation switching |
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| CN101895940A (en) * | 2010-07-26 | 2010-11-24 | 北京邮电大学 | Method for distributing resources between main service cell and coordinate cells |
| CN102378242A (en) * | 2010-08-10 | 2012-03-14 | 中兴通讯股份有限公司 | Method and device for generating optimal cell list during carrier aggregation switching |
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