CN103312402A - Data transmission method with dynamic cell selection, user terminal and cell - Google Patents
Data transmission method with dynamic cell selection, user terminal and cell Download PDFInfo
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Abstract
The invention discloses a data transmission method with dynamic cell selection, a user terminal and a cell. The method comprises the following steps: a user receives physical downlink control channel information transmitted by a main service cell; the user receives data transmitted by an optimal data transmission cell and a demodulation reference signal (DMRS) generated by using the cellular identify of the main service cell according to the physical downlink control signal information; and the user demodulates the received data by using the DMRS of the main service cell. According to the data transmission method with dynamic cell selection, the user terminal and the cell disclosed by the invention, when data are transmitted to the user in optimal data transmission cell, the DMRS of the main service cell is used for transmitting and the user demodulates the received data by using the DMRS of the main service cell, so that the signaling process of informing the index information of the user optimal data transmission cell in an original control channel is reduced, the design flow of a downlink control signaling format is eliminated, and the overhead of control signaling is lowered.
Description
Technical field
The present invention relates to communication technical field, particularly, relate to data transmission method, user terminal and residential quarter that dynamic cell is selected.
Background technology
LTE-A (LTE-Advanced) system adopts OFDMA (Orthogonal Frequency Division Multiplexing Access, the multiple access access of OFDM) technology, user's information is carried on the mutually orthogonal different sub carrier in the residential quarter, thereby has avoided the interference of the multiple access between the user in the residential quarter.But OFDMA access mode itself does not possess the ability that suppresses presence of intercell interference, and the interference that therefore affects the LTE-A systematic function is mainly from neighbor cell, i.e. the interference of minizone.
In the conventional cellular systems of identical networking, the user of cell edge will be subject to the interference of neighbor cell signal, and these serious interference have limited service quality and the throughput of edge customer.If adjacent a plurality of residential quarters transmit to the user jointly by cooperating, interference signal is suppressed, just can effectively reduce presence of intercell interference, improve each user's signal received signal to noise ratio.
CoMP (Coordinated Multi Points, coordinate multipoint) transmission technology is according to sharing users data whether between the base station, be divided into JP (joint processing, Combined Treatment) and two types of CS/CB (Coordinated Scheduling/Beamforming, cooperative scheduling/beam shaping).Storage of subscriber data is at a plurality of Nodes of cooperation in the JP scheme, so again according to a plurality of nodes of cooperation whether simultaneously the transmission of participating user data be divided into JT (Joint transmission, unite transmission) and DCS (Dynamic cell selection, dynamic cell is selected).The some nodes of Dynamic Selection are as the sending node of user data in the cooperation cell set for the DCS scheme, and other nodes are the transmission of participating user data not.This scheme does not require that a plurality of cooperation cell send user data simultaneously, does not require the channel information of sharing between a plurality of residential quarters, and is more simple than the JT scheme.In the DCS scheme, generally can from cooperation cell set, select a residential quarter send data to the user, the cell information that network side need to be chosen to user notification.If changed by the residential quarter chosen, the cell information that need to choose to the new quilt of user notification of network side then.The cell information that network side all will be chosen to the new quilt of user notification in actual applications, may be changed by frequent occurrence by the residential quarter chosen, if then can increase signaling consumption at every turn.
Summary of the invention
The objective of the invention is the large defective of control signal expense for existing DCS scheme, propose data transmission method, user terminal and residential quarter that a kind of dynamic cell is selected.
For achieving the above object, according to an aspect of the present invention, the data transmission method that provides a kind of dynamic cell to select.
Data transmission method according to the dynamic cell of the embodiment of the invention is selected comprises:
The user receives the Physical Downlink Control Channel information that main Serving cell issues;
The user receives optimal data and sends the demodulated reference signal that the residential quarter data that send and the cell ID that uses main Serving cell generate according to Physical Downlink Control Channel information;
The data that the user uses the demodulated reference signal demodulation of main Serving cell to receive.
In technique scheme, also comprise receive the step of the Physical Downlink Control Channel information that main Serving cell issues the user before:
The received power of user's measuring reference signals obtains Reference Signal Received Power information and/or Reference Signal Received Quality information;
The user selects main Serving cell according to Reference Signal Received Power information and/or Reference Signal Received Quality information.
In technique scheme, before the step of the demodulated reference signal that the data that receive optimal data transmission residential quarter transmission and the cell ID that uses main Serving cell generate, also comprise:
The user measures the channel quality of each residential quarter in the coordinate multipoint cooperation set, selects optimal data to send the residential quarter, and reports optimal data to send index information and the channel quality information of residential quarter.
In technique scheme, the index information that optimal data sends the residential quarter is that optimal data sends the cell ID of residential quarter or according to the index information of the cooperation scenario definition of coordinate multipoint.
In technique scheme, user's measure channel quality, the step of selecting optimal data to send the residential quarter specifically comprises:
The user estimates the descending common reference channel of each residential quarter in the coordinate multipoint cooperation set, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter; Or,
The user estimates the descending common reference channel of each residential quarter in the coordinate multipoint cooperation set, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter.
In technique scheme, also comprise use the step of the data that the demodulated reference signal demodulation of main Serving cell receives the user before:
The user uses the sign of main Serving cell to generate demodulated reference signal, and the demodulated reference signal of generation is the demodulated reference signal of main Serving cell.
For achieving the above object, according to an aspect of the present invention, the data transmission method that provides another kind of dynamic cell to select.
Data transmission method according to the dynamic cell of the embodiment of the invention is selected comprises:
Main Serving cell receives index information and the channel quality information of the optimal data transmission residential quarter of reporting of user;
Main Serving cell notice optimal data sends the residential quarter and sends data to the user; Main Serving cell sends Physical Downlink Control Channel information to the user.
In technique scheme, do not comprise in the Physical Downlink Control Channel information that optimal data sends the index information of residential quarter.
In technique scheme, the index information that optimal data sends the residential quarter is that optimal data sends the sign of residential quarter or according to the index information of the cooperation scenario definition of coordinate multipoint.
In technique scheme, also comprise:
Distribute and the calculating pre-coding matrix by resource for the active user carries out for main Serving cell, and resource allocation information and pre-coding matrix are issued optimal data transmission residential quarter.
For achieving the above object, according to an aspect of the present invention, the data transmission method that provides another kind of dynamic cell to select.
Data transmission method according to the dynamic cell of the embodiment of the invention is selected comprises:
What optimal data sent that the residential quarter receives that main Serving cell sends sends the request of data to the user;
Optimal data sends the residential quarter sends data and demodulated reference signal from main Serving cell to the user.
In technique scheme, also comprised before optimal data sends the residential quarter sends data and the step of demodulated reference signal from main Serving cell to the user: optimal data sends the residential quarter and uses the sign of main Serving cell to generate demodulated reference signal, and the demodulated reference signal of generation is the demodulated reference signal of main Serving cell.
In technique scheme, before sending the residential quarter sends data and the step of demodulated reference signal from main Serving cell to the user, optimal data also comprises:
Optimal data sends the residential quarter and obtains resource allocation information and the pre-coding matrix that main Serving cell provides;
Optimal data sends the residential quarter and uses pre-coding matrix respectively the demodulated reference signal of data and main Serving cell to be weighted;
Optimal data sends the residential quarter and specifically comprises to the step that the user sends the demodulated reference signal of data and main Serving cell: optimal data sends the residential quarter and sends through the data after the pre-coding matrix weighting and the demodulated reference signal of main Serving cell in the resource of resource allocation information indication.
In technique scheme, after sending the step that the residential quarter receives the request that sends data to the user that main Serving cell sends, optimal data also comprises:
Optimal data sends the residential quarter and judges whether to reply that main Serving cell sends sends the request of data to the user;
If reply, then send acknowledge message to main Serving cell, otherwise, then send refuse information to main Serving cell.
For achieving the above object, according to another aspect of the present invention, the user terminal that provides a kind of dynamic cell to select.
User terminal according to the dynamic cell of the embodiment of the invention is selected comprises:
Information receiving module is used for receiving the Physical Downlink Control Channel information that main Serving cell issues;
Data reception module is used for according to Physical Downlink Control Channel information, receives optimal data and sends the demodulated reference signal that the residential quarter data that send and the cell ID that uses main Serving cell generate;
Data demodulation module is for the data of the demodulated reference signal demodulation reception of using main Serving cell.
In technique scheme, user terminal also comprises:
The information acquisition module for the received power of measuring reference signals, obtains Reference Signal Received Power information and/or Reference Signal Received Quality information;
Module is selected in the residential quarter, is used for according to Reference Signal Received Power information and/or Reference Signal Received Quality information, selects main Serving cell.
In technique scheme, user terminal also comprises:
Select reporting module, be used for measuring the channel quality of each residential quarter of coordinate multipoint cooperation set, select optimal data to send the residential quarter, and report optimal data to send index information and the channel quality information of residential quarter.
In technique scheme, select reporting module specifically to comprise:
The first chooser module is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter; Or,
The second chooser module is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter.
For achieving the above object, according to another aspect of the present invention, the main Serving cell that provides a kind of dynamic cell to select.
Main Serving cell according to the dynamic cell of the embodiment of the invention is selected comprises:
Information receiving module is for index information and the channel quality information of the optimal data transmission residential quarter that receives reporting of user;
The data notification module is used for notice optimal data transmission residential quarter and sends data to the user;
Information sending module is used for sending Physical Downlink Control Channel information to the user.
In technique scheme, main Serving cell also comprises:
The Distribution Calculation module is used to the active user to carry out resource distribution and calculating pre-coding matrix, and resource allocation information and pre-coding matrix are issued optimal data transmission residential quarter.
For achieving the above object, according to another aspect of the present invention, the optimal data that provides a kind of dynamic cell to select sends the residential quarter.
The optimal data of selecting according to the dynamic cell of the embodiment of the invention sends the residential quarter, comprising:
The request receiving module is used for receiving that main Serving cell sends sends the request of data to the user;
Data transmission blocks is for the demodulated reference signal that sends data and main Serving cell to the user.
In technique scheme, optimal data sends the residential quarter and also comprises:
The information acquisition module is used for obtaining resource allocation information and the pre-coding matrix that main Serving cell provides;
The matrix weighting block is used for using pre-coding matrix respectively the demodulated reference signal of data and main Serving cell to be weighted;
Described data transmission blocks, concrete being used for sends through the data after the pre-coding matrix weighting and the demodulated reference signal of main Serving cell in the resource of resource allocation information indication.In technique scheme, optimal data sends the residential quarter and also comprises:
Reply judge module, be used for judging whether replying that main Serving cell sends sends the request of data to the user;
Reply sending module, be used for the result whether basis replys, send message to main Serving cell: if reply, then send acknowledge message to main Serving cell, otherwise, then send refuse information to main Serving cell.
Data transmission method, user terminal and residential quarter that the dynamic cell of various embodiments of the present invention is selected, it is the DMRS of main Serving cell to the DMRS that the user sends that optimal data sends the residential quarter, the data that the user uses the DMRS demodulation of main Serving cell to receive, reduced the signaling procedure that to notify user's optimal data to send cell index information in the former control channel, remove the flow process of descending control signaling format design from, reduced the expense of control signal; For the user, it is transparent that data send, and is equal to from main serving BS receive data.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the data transmission method embodiment one that dynamic cell is selected according to the present invention;
Fig. 2 is the structural representation of the data transmission method embodiment two that dynamic cell is selected according to the present invention;
Fig. 3 is the flow chart of the data transmission method embodiment two that dynamic cell is selected according to the present invention;
Fig. 4 is the user terminal schematic diagram of selecting according to the dynamic cell of the embodiment of the invention;
Fig. 5 is the main Serving cell schematic diagram of selecting according to the dynamic cell of the embodiment of the invention;
Fig. 6 sends the residential quarter schematic diagram according to the optimal data that the dynamic cell of the embodiment of the invention is selected.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment of the method
The data transmission method that the inventive method embodiment one provides a kind of dynamic cell to select, as shown in Figure 1, the present embodiment comprises:
Step 102: user selection master Serving cell;
Step 104: the channel quality of each residential quarter in the cooperation of the user's periodic measurement CoMP set, select optimal data to send the residential quarter, and index information and the channel quality that optimal data sends the residential quarter reported main Serving cell;
Step 106: after one section delay, main Serving cell receives that the optimal data of reporting of user sends index information and the channel quality of residential quarter, the notice optimal data sends the residential quarter and sends data to the user, and send PDCCH (Physical Downlink Control Channel) information to the user, indication current time optimal data sends the index information of residential quarter, wherein, to notify the index information that sends the residential quarter to user's optimal data may not be the index information that optimal data that user self reports sends the residential quarter to main Serving cell;
Step 108: optimal data sends the residential quarter and uses the DMRS (Demodulation Reference Signals, demodulated reference signal) of self to send data to the user;
Step 110: the user uses optimal data to send the DMRS demodulating data of residential quarter.
The data transmission method that the dynamic cell of this method embodiment one is selected, control channel is sent by main Serving cell, and data channel sends the residential quarter by optimal data and sends, and has guaranteed the optimal transmission effect of transfer of data.
The data transmission method that the inventive method embodiment two provides another kind of dynamic cell to select, as shown in Figure 2, the overall thought of the present embodiment is: user's control channel is sent by main Serving cell, data channel sends residential quarter (being TPoptimal) by optimal data and sends, but DMRS still uses the sequence of main Serving cell
Therefore, concerning the user, the transmission of data is transparent, namely brings in from the user, can be understood as data and is still sent by main Serving cell.Among Fig. 2, the main Serving cell of UE1 is TP1, and it is TP2 that optimal data sends the residential quarter, and this user's DMRS selects the sequence of TP1 so
Same, the main Serving cell of UE2 is TP2, and it is TP1 that optimal data sends the residential quarter, and this user's DMRS selects the sequence of TP2 to be so
Need to prove, y can (N
x ID), wherein, y represents DMRS, and f is the ordinal function of the Serving cell x of independent variable N, and 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 (being cell ID).
As shown in Figure 3, the specific implementation flow process of the present embodiment is:
Step 202: user selection master Serving cell ServCell;
Particularly, the user is when carrying out residential quarter selection or gravity treatment, according to measured downlink reference signal received power, obtain 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=coefficient a * useful Reference Signal Received Power/all Reference Signal Received Power according to Reference Signal Received Power information and/or Reference Signal Received Quality information, is selected main Serving cell again;
Step 204: the user presses the channel quality that some cycles is measured each residential quarter in the CoMP cooperation set, select optimal data to send residential quarter (TPoptimal), and report optimal data to send index information (Index) and the channel quality information CQI (Channel quality indicator, CQI) of residential quarter to main Serving cell;
Need to prove, the Index of TPoptimal can be the cell ID of TPoptimal, also can be a kind of Index for the new definition of cooperation scene;
In step 204, the method for selecting optimal data to send the residential quarter according to channel quality includes but not limited to:
The channel gain method: the user estimates the descending common reference channel of each residential quarter in the CoMP cooperation set, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter;
The maximum method of throughput: the user estimates the descending common reference channel of each residential quarter in the CoMP cooperation set, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter; Wherein, this code book is for using under the codebook basedprecoding transmission mode precoding codebook set of system definition;
Step 206: main Serving cell is user assignment downlink resource, also definite pre-coding matrix;
Step 208: after the certain delay of main Serving cell experience receives that the optimal data that reports sends the Index of residential quarter (being TPoptimal), the notice optimal data sends the residential quarter and sends data to the user, and resource allocation information and pre-coding matrix are issued optimal data transmission residential quarter;
Need to prove, main Serving cell receives that the optimal data that reports sends residential quarter (being TPoptimal) and may be different transmission residential quarters from main Serving cell notice for the optimal data transmission residential quarter that the active user sends data in the step 208, main Serving cell can be revised or the optimal data of mistake reception reporting of user sends the residential quarter, and main Serving cell selects optimal data transmission residential quarter to send data for the active user according to the result who self measures or the demand of self again.
In step 208, can be that main Serving cell passes through X2 interface, the information notification optimal data is sent the residential quarter, also can transmit this information by central IWU (being used for a plurality of cooperation cell of unified management);
After step 210:TPoptimal obtains resource allocation information and pre-coding matrix, use pre-coding matrix respectively needs to be issued user's data and the DMRS weighting of main Serving cell, resource in the resource allocation information indication sends through the data after the pre-coding matrix weighting and the DMRS of main Serving cell, wherein, the DMRS of main Serving cell is the DMRS that TPoptimal utilizes the index information of main Serving cell to generate;
Step 212: main Serving cell sends PDCCH (physical downlink control channel, Physical Downlink Control Channel) for the user, and TPoptimal sends data for the user;
In step 212, TPoptimal sends in the data procedures for the user, and DMRS selects the sequence of main Serving cell
The index information that so just need not notify user's optimal data to send the residential quarter, the user only utilizes the DMRS of main Serving cell to get final product correct receive data.
Step 214: the user utilizes the DMRS of main Serving cell
Finish the reception of data channel; Particularly, after the user obtains the cell ID of main Serving cell, according to y=f (N
x ID) formula can calculate to get DMRS.That is, the user utilizes the cell ID of main Serving cell to generate DMRS, and the DMRS of generation is the DMRS of main Serving cell, the data that the user utilizes the DMRS demodulation TPoptimal of main Serving cell to send.
The data transmission method that the dynamic cell of this method embodiment two is selected is compared with embodiment of the method one, and its difference is, in step 212, the PDCCH that main Serving cell sends to the user needn't indicate optimal data to send the index information of residential quarter (1); (2) in step 210, optimal data sends the residential quarter and utilizes the cell ID of main Serving cell to generate DMRS, namely generates the DMRS of main Serving cell, and the DMRS that sends to the user is the DMRS of main Serving cell; (3) in step 214, the user uses the DMRS demodulating data according to the cell ID generation of main Serving cell.Need to prove, main Serving cell sends the step of PDCCH to the user, and main Serving cell notice optimal data sends the residential quarter and sends data and resource allocation information and pre-coding matrix issued between the step that optimal data sends the residential quarter to the user and do not have inevitable sequencing relation.
Can be found out by above-mentioned difference, the data transmission method that the dynamic cell of the present embodiment is selected, optimal data sends the residential quarter sends DMRS from the cell ID generation of data and the main Serving cell of use to the user, the data that the user uses the DMRS demodulation of main Serving cell to receive, reduced the signaling procedure that to notify user's optimal data to send cell index information in the former control channel, remove the flow process of descending control signaling format design from, reduced the expense of control signal; For the user, it is transparent that data send, and is equal to from main serving BS receive data.
For ease of the more thorough technical scheme of understanding the application of those skilled in the art, now said method embodiment two is further specified, shown in following embodiment of the method three, four, five, send cell side and be elaborated from user's side, main Serving cell side, optimal data respectively.
The data transmission method that the inventive method embodiment three provides another kind of dynamic cell to select, the present embodiment mainly comes the realization flow of illustration method with user's side, and the present embodiment comprises:
Step 302: the user measures the downlink reference signal received power, obtains Reference Signal Received Power information and/or Reference Signal Received Quality information, and according to Reference Signal Received Power information and/or Reference Signal Received Quality information, selects main Serving cell;
Step 304: the user measures the channel quality of each residential quarter in the CoMP cooperation set, select optimal data to send residential quarter (TPoptimal), and the index information (Index) from the residential quarter to main Serving cell and the channel quality information that report optimal data to send (are CQI, with MCS (Modulation and Coding Scheme, modulating-coding form) expression);
Need to prove, the Index of TPoptimal can be the cell ID of TPoptimal, also can be a kind of Index for the new definition of cooperation scene;
In step 304, the method for selecting optimal data to send the residential quarter according to channel quality comprises:
The channel gain method: the user estimates the descending common reference channel of each residential quarter in the CoMP cooperation set, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter;
The maximum method of throughput: the user estimates the descending common reference channel of each residential quarter in the CoMP cooperation set, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter;
Step 306: the user receives the PDCCH that main Serving cell sends, and obtains MCS grade and resource allocation conditions;
Step 308: the user receives the data that TPoptimal sends, and the data of using the DMRS demodulation of main Serving cell to receive, the DMRS of the main Serving cell DMRS that to be the user generate according to the cell ID of main Serving cell.In addition, the user receives the data that TPoptimal sends in the indicated resource of resource allocation information that PDCCH carries.
The data transmission method that the inventive method embodiment four provides another kind of dynamic cell to select, the present embodiment mainly comes the realization flow of illustration method with main Serving cell side, and the present embodiment comprises:
Step 402: main Serving cell sends public reference signal;
Step 404: main Serving cell receives index information (being Index) and the channel quality information CQI of the optimal data transmission residential quarter (being TPoptimal) of user feedback;
In step 404, before non-selected optimal data sent the residential quarter, above-mentioned CQI was the CQI of main Serving cell, and after selecting optimal data transmission residential quarter, above-mentioned CQI is the CQI that optimal data sends the residential quarter;
Step 406: distribute and the calculating pre-coding matrix by resource for the active user carries out for main Serving cell;
Step 408: main Serving cell notice TPoptimal sends data for the active user, and send resource allocation information and pre-coding matrix to the user, so that TPoptimal uses pre-coding matrix respectively needs to be issued user's data and the DMRS of main Serving cell is weighted, and the data after sending weighting to the user on the resource of resource allocation information indication and the DMRS of main Serving cell, wherein, the DMRS of main Serving cell is the DMRS that TPoptimal uses the index information of main Serving cell to generate;
Need to prove, the prerequisite that the present invention realizes is to be provided with collaborative network between a plurality of residential quarters, each cell ID of network side is known, therefore in step 408, when main Serving cell notice TPoptimal sends data for the active user, do not need the cell ID of main Serving cell is notified to TPoptimal;
Step 410: main Serving cell sends PDCCH to the user.
The data transmission method that the inventive method embodiment five provides another kind of dynamic cell to select, the present embodiment mainly send the realization flow that cell side is come illustration method with optimal data, and the present embodiment comprises:
Step 502: optimal data sends the residential quarter and sends public reference signal;
Step 504: what optimal data sent that the residential quarter receives autonomous Serving cell sends the request of data to the user;
Step 506: optimal data sends the residential quarter and judges whether to receive this data sending request according to self loading condition or network quality situation etc., for example, if self load is heavier, then receive data does not send request, if self load is lighter, then receive data sends request;
Step 508: optimal data sends the residential quarter and sends message authentication or refusal to main Serving cell;
Step 510: behind message authentication, optimal data sends the residential quarter and utilizes the ID of main Serving cell to generate the DMRS of main Serving cell, and sends the DMRS of data and main Serving cell to the user.
Need to prove, optimal data sends the residential quarter and sends before the DMRS of data and main Serving cell to the user, can obtain resource allocation information and pre-coding matrix that main Serving cell provides, and the use pre-coding matrix respectively needs is issued user's data and the DMRS of main Serving cell is weighted, afterwards, the data after sending weighting to the user on the resource of resource allocation information indication and the DMRS of main Serving cell.
Device embodiment
According to the embodiment of the invention, the user terminal that provides a kind of dynamic cell to select.As shown in Figure 4, the present embodiment comprises:
Information receiving module 11 is used for receiving the Physical Downlink Control Channel information that main Serving cell issues;
Data reception module 12 is used for according to Physical Downlink Control Channel information, receives optimal data and sends the demodulated reference signal that the residential quarter data that send and the cell ID that uses main Serving cell generate;
Data demodulation module 13 is for the data of the demodulated reference signal demodulation reception of using main Serving cell.
The present embodiment also comprises:
Information acquisition module 14 for the received power of measuring reference signals, obtains Reference Signal Received Power information and/or Reference Signal Received Quality information;
Module 15 is selected in the residential quarter, is used for according to Reference Signal Received Power information and/or Reference Signal Received Quality information, selects main Serving cell;
Select reporting module 16, be used for measuring the channel quality of each residential quarter of coordinate multipoint cooperation set, select optimal data to send the residential quarter, and report optimal data to send index information and the channel quality information of residential quarter.
Wherein: select reporting module 16 specifically to comprise:
The first chooser module 161 is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter; Or,
The second chooser module 162 is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter.
According to the embodiment of the invention, the main Serving cell that provides a kind of dynamic cell to select.As shown in Figure 5, the present embodiment comprises:
Information receiving module 21 is for index information and the channel quality information of the optimal data transmission residential quarter that receives reporting of user;
Data notification module 22 is used for notice optimal data transmission residential quarter and sends data to the user;
Information sending module 23 is used for sending Physical Downlink Control Channel information to the user.
The present embodiment also comprises:
Distribution Calculation module 24 is used to the active user to carry out resource distribution and calculating pre-coding matrix, and resource allocation information and pre-coding matrix are issued optimal data transmission residential quarter.
According to the embodiment of the invention, the optimal data that provides a kind of dynamic cell to select sends the residential quarter.As shown in Figure 6, the present embodiment comprises:
Request receiving module 31 is used for receiving that main Serving cell sends sends the request of data to the user;
Data transmission blocks 32 is for the demodulated reference signal that sends data and main Serving cell to the user.
Optimal data sends the residential quarter and also comprises:
Information acquisition module 35 is used for obtaining resource allocation information and the pre-coding matrix that main Serving cell provides;
Matrix weighting block 36 is used for using pre-coding matrix respectively the demodulated reference signal of data and main Serving cell to be weighted;
Data transmission blocks 32, concrete being used for sends through the data after the pre-coding matrix weighting and the demodulated reference signal of main Serving cell in the resource of resource allocation information indication; Reply judge module 33, be used for judging whether replying that main Serving cell sends sends the request of data to the user;
Reply sending module 34, be used for the result whether basis replys, send message to main Serving cell: if reply, then send acknowledge message to main Serving cell, otherwise, then send refuse information to main Serving cell.
The user terminal that the dynamic cell of above embodiment is selected, main Serving cell and optimal data send the residential quarter, optimal data sends the residential quarter when sending data to the user, use the DMRS of main Serving cell to send, the data that the user uses the DMRS demodulation of main Serving cell to receive, reduced the signaling procedure that to notify user's optimal data to send cell index information in the former control channel, remove the flow process of descending control signaling format design from, reduced the expense of control signal; For the user, it is transparent that data send, and is equal to from main serving BS receive data.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (23)
1. the data transmission method that dynamic cell is selected is characterized in that, comprising:
The user receives the Physical Downlink Control Channel information that main Serving cell issues;
The user receives optimal data and sends the demodulated reference signal that the residential quarter data that send and the cell ID that uses main Serving cell generate according to described Physical Downlink Control Channel information;
The data that the user uses the demodulated reference signal demodulation of main Serving cell to receive.
2. method according to claim 1 is characterized in that, also comprises receive the step of the Physical Downlink Control Channel information that main Serving cell issues described user before:
The received power of user's measuring reference signals obtains Reference Signal Received Power information and/or Reference Signal Received Quality information;
Described user selects main Serving cell according to Reference Signal Received Power information and/or Reference Signal Received Quality information.
3. method according to claim 1 is characterized in that, also comprises before the step of the demodulated reference signal that the data that receive optimal data transmission residential quarter transmission and the cell ID that uses main Serving cell generate:
The user measures the channel quality of each residential quarter in the coordinate multipoint cooperation set, selects optimal data to send the residential quarter, and reports optimal data to send index information and the channel quality information of residential quarter.
4. method according to claim 3 is characterized in that, the index information that described optimal data sends the residential quarter is that described optimal data sends the cell ID of residential quarter or according to the index information of the cooperation scenario definition of coordinate multipoint.
5. method according to claim 3 is characterized in that, user's measure channel quality, and the step of selecting optimal data to send the residential quarter specifically comprises:
The user estimates the descending common reference channel of each residential quarter in the coordinate multipoint cooperation set, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter; Or,
The user estimates the descending common reference channel of each residential quarter in the coordinate multipoint cooperation set, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter.
6. method according to claim 1 is characterized in that, also comprises use the step of the data that the demodulated reference signal demodulation of main Serving cell receives the user before:
The user uses the sign of main Serving cell to generate demodulated reference signal, and the demodulated reference signal of described generation is the demodulated reference signal of main Serving cell.
7. the data transmission method that dynamic cell is selected is characterized in that,
Main Serving cell receives index information and the channel quality information of the optimal data transmission residential quarter of reporting of user;
Described main Serving cell notice optimal data sends the residential quarter and sends data to the user;
Described main Serving cell sends Physical Downlink Control Channel information to the user.
8. method according to claim 7 is characterized in that, does not comprise in the described Physical Downlink Control Channel information that optimal data sends the index information of residential quarter.
9. method according to claim 8 is characterized in that, the index information that described optimal data sends the residential quarter is that described optimal data sends the sign of residential quarter or according to the index information of the cooperation scenario definition of coordinate multipoint.
10. according to claim 7,8 or 9 described methods, it is characterized in that, also comprise: distribute and calculate pre-coding matrix by resource for the active user carries out for described main Serving cell, resource allocation information and pre-coding matrix issued optimal data send the residential quarter.
11. the data transmission method that dynamic cell is selected is characterized in that, comprising:
What optimal data sent that the residential quarter receives that main Serving cell sends sends the request of data to the user;
Described optimal data sends the residential quarter sends data and demodulated reference signal from main Serving cell to the user.
12. method according to claim 11, it is characterized in that, also comprised before described optimal data sends the residential quarter sends data and the step of demodulated reference signal from main Serving cell to the user: described optimal data sends the residential quarter and uses the sign of main Serving cell to generate demodulated reference signal, and the demodulated reference signal of described generation is the demodulated reference signal of main Serving cell.
13. according to claim 11 or 12 described methods, it is characterized in that, before described optimal data sends the residential quarter sends data and the step of demodulated reference signal from main Serving cell to the user, also comprise:
Described optimal data sends the residential quarter and obtains resource allocation information and the pre-coding matrix that main Serving cell provides;
Described optimal data sends the residential quarter and uses pre-coding matrix respectively the demodulated reference signal of data and main Serving cell to be weighted;
Described optimal data sends the residential quarter and specifically comprises to the step that the user sends the demodulated reference signal of data and main Serving cell: described optimal data sends the residential quarter and sends through the data after the pre-coding matrix weighting and the demodulated reference signal of main Serving cell in the resource of resource allocation information indication.
14. according to claim 11 or 12 described methods, it is characterized in that, after optimal data sends the step that the residential quarter receives the request that sends data to the user that main Serving cell sends, also comprise:
Described optimal data sends the residential quarter and judges whether to reply that main Serving cell sends sends the request of data to the user;
If reply, then send acknowledge message to described main Serving cell, otherwise, then send refuse information to described main Serving cell.
15. the user terminal that dynamic cell is selected is characterized in that, comprising:
Information receiving module is used for receiving the Physical Downlink Control Channel information that main Serving cell issues;
Data reception module is used for according to described Physical Downlink Control Channel information, receives optimal data and sends the demodulated reference signal that the residential quarter data that send and the cell ID that uses main Serving cell generate;
Data demodulation module is for the data of the demodulated reference signal demodulation reception of using described main Serving cell.
16. user terminal according to claim 15 is characterized in that, also comprises:
The information acquisition module for the received power of measuring reference signals, obtains Reference Signal Received Power information and/or Reference Signal Received Quality information;
Module is selected in the residential quarter, is used for according to Reference Signal Received Power information and/or Reference Signal Received Quality information, selects main Serving cell.
17. user terminal according to claim 15 is characterized in that, also comprises:
Select reporting module, be used for measuring the channel quality of each residential quarter of coordinate multipoint cooperation set, select optimal data to send the residential quarter, and report optimal data to send index information and the channel quality information of residential quarter.
18. user terminal according to claim 17 is characterized in that, described selection reporting module specifically comprises:
The first chooser module is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, obtains the channel gain of each residential quarter, and the maximum residential quarter of selective channel gain is that optimal data sends the residential quarter; Or,
The second chooser module is used for estimating the coordinate multipoint cooperation and gathers the descending common reference channel of each residential quarter, travels through all code books, selects optimum code book for each residential quarter, and the residential quarter of selection throughput maximum is that optimal data sends the residential quarter.
19. the main Serving cell that dynamic cell is selected is characterized in that, comprising:
Information receiving module is for index information and the channel quality information of the optimal data transmission residential quarter that receives reporting of user;
The data notification module is used for notice optimal data transmission residential quarter and sends data to the user;
Information sending module is used for sending Physical Downlink Control Channel information to the user.
20. main Serving cell according to claim 19 is characterized in that, also comprises:
The Distribution Calculation module is used to the active user to carry out resource distribution and calculating pre-coding matrix, and resource allocation information and pre-coding matrix are issued optimal data transmission residential quarter.
21. the optimal data transmission residential quarter that dynamic cell is selected is characterized in that, comprising:
The request receiving module is used for receiving that main Serving cell sends sends the request of data to the user;
Data transmission blocks is for the demodulated reference signal that sends data and main Serving cell to the user.
22. optimal data according to claim 21 sends the residential quarter, it is characterized in that, also comprises:
The information acquisition module is used for obtaining resource allocation information and the pre-coding matrix that main Serving cell provides;
The matrix weighting block is used for using pre-coding matrix respectively the demodulated reference signal of data and main Serving cell to be weighted;
Described data transmission blocks, concrete being used for sends through the data after the pre-coding matrix weighting and the demodulated reference signal of main Serving cell in the resource of resource allocation information indication.
23. according to claim 21 or 22 described optimal data send residential quarters, it is characterized in that, also comprise:
Reply judge module, be used for judging whether replying that main Serving cell sends sends the request of data to the user;
Reply sending module, be used for the result whether basis replys, send message to main Serving cell: if reply, then send acknowledge message to described main Serving cell, otherwise, then send refuse information to described main Serving cell.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016070702A1 (en) * | 2014-11-06 | 2016-05-12 | 电信科学技术研究院 | Data channel scheduling method, device and system |
| CN107172635A (en) * | 2017-05-11 | 2017-09-15 | 中国联合网络通信集团有限公司 | The method and system of data transfer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20110223917A1 (en) * | 2008-11-04 | 2011-09-15 | Huawei Technologies Co., Ltd. | Method, apparatus and system for informing a serving cell handover |
| 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 |
-
2012
- 2012-03-16 CN CN201210071893.XA patent/CN103312402B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110223917A1 (en) * | 2008-11-04 | 2011-09-15 | Huawei Technologies Co., Ltd. | Method, apparatus and system for informing a serving cell handover |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016070702A1 (en) * | 2014-11-06 | 2016-05-12 | 电信科学技术研究院 | Data channel scheduling method, device and system |
| US10271344B2 (en) | 2014-11-06 | 2019-04-23 | China Academy Of Telecommunications Technology | Data channel scheduling method, device and system |
| CN107172635A (en) * | 2017-05-11 | 2017-09-15 | 中国联合网络通信集团有限公司 | The method and system of data transfer |
| CN107172635B (en) * | 2017-05-11 | 2019-11-26 | 中国联合网络通信集团有限公司 | The method and system of data transmission |
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|---|---|
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