CN101488832A - Channel detecting and processing method, terminal and base station - Google Patents
Channel detecting and processing method, terminal and base station Download PDFInfo
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- CN101488832A CN101488832A CNA2009100052255A CN200910005225A CN101488832A CN 101488832 A CN101488832 A CN 101488832A CN A2009100052255 A CNA2009100052255 A CN A2009100052255A CN 200910005225 A CN200910005225 A CN 200910005225A CN 101488832 A CN101488832 A CN 101488832A
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Abstract
The present invention provides a channel detecting and processing method, terminal and base station, wherein, the channel detecting method comprises that: the terminal acquires index information from the base station, wherein, the index information is preset by the base station for indicating downlink component carrier wave numbers occupied by the PDSCH for the terminal scheduling in the downlink chain; the terminal detects the corresponding PDSCH on the downlink component carrier wave, the detected downlink component carrier wave numbers and the downlink component carrier wave numbers indicated by the index information are compared; if the detected downlink component carrier wave numbers are not equal to the downlink component carrier wave numbers indicated by the index information, so that the terminal can not feedback the reply message. According to the invention, the loss of the transmission data can be avoided, and the transmission quality of the communication system can be improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of Channel Detection and processing method, terminal, base station.
Background technology
At senior international mobile communication (International MobileTelecommunications-Advanced, abbreviate IMT-Advanced as) in the system, can realize the high-speed transfer of data, and has a bigger power system capacity, under the situation about move at low speed, focus covering, the peak rate of IMT-Advanced system can reach 1Gbit/s, and under the situation that high-speed mobile, wide area cover, the peak rate of IMT-Advanced system can reach 100Mbit/s.
In order to satisfy (the International TelecommunicationUnion-Advanced of senior International Telecommunications Union, abbreviate ITU-Advanced as) requirement, as Long Term Evolution (Long Term Evolution, abbreviate LTE as) senior Long Term Evolution (the Long Term Evolution Advanced of evolution standard, abbreviating LTE-Advanced as) system need support bigger system bandwidth (reaching as high as 100MHz), and need the existing standard of backward compatibility LTE.On the basis of prior LTE system, the bandwidth of LTE system can be merged and obtain bigger bandwidth, this technology is called carrier aggregation (carrieraggregation, abbreviate CA as) technology, the availability of frequency spectrum, alleviation frequency spectrum resource that this technology can improve the IMT-Advance system are in short supply, and then optimize the utilization of frequency spectrum resource.
After the LTE-Advance system adopts carrier aggregation technology, can come transmitting downlink data by a plurality of downlink component carriers of dynamic dispatching (component carrier), wherein, each downlink component carrier can carry Physical Downlink Shared Channel (Physical Downlink SharedChannel, abbreviate PDSCH as) and Physical Downlink Control Channel (Physical DownlinkControl Channel, abbreviate PDCCH as), PDSCH and PDCCH are corresponding one by one.Wherein, PDSCH is used to carry the downlink data that the base station sends to the user; PDCCH is used for carrying and resolves this downlink data configuration information needed.For each downlink component carrier, in data transmission procedure, the base station can be carried on downlink data and the configuration information corresponding with this downlink data among PDSCH and the PDCCH respectively and send to the user, and the user detects downlink data among the PDSCH by reading configuration information among the PDCCH.If the configuration information on certain PDCCH is lost, then terminal can not read the downlink data on the PDSCH of this PDCCH correspondence, can not feed back yet and mix automatic repeat requests (HybridAutomatic Repeat Request abbreviates HARQ as) information.
In actual mechanical process, in order to improve system's coverage rate, the user can be by carrying out logical AND (AND) operation to a plurality of HARQ information, promptly, HARQ-ACK information to the PDSCH correspondence on a plurality of downlink component carriers is bound (Bundling), feedback information after the binding is returned at predetermined Physical Uplink Control Channel (PhysicalDownlink Control Channel, abbreviate PUCCH as) on, PDSCH's on PUCCH that should be predetermined and the downlink component carrier is corresponding, in addition, should predetermined PUCCH be consensus by base station and terminal, the base station be detected this predetermined PUCCH, just can know that terminal detects the situation of PDSCH.If the configuration information among the PDCCH of the PDSCH correspondence on certain downlink component carrier is lost, then UE can not detect the downlink data on this PDSCH, correspondingly, do not have feedback information yet, will produce a problem like this: if terminal to the detection of the PDSCH on other downlink component carriers all be correct (be that each HARQ information is ACK (Acknowledgement, correctly reply), then pass through behind these feedback informations Bundling, UE will feeding back ACK message to predetermined PUCCH, and the base station since detected be ACK message, think that then terminal has correctly detected all PDSCH, and can the downlink data of losing on the downlink component carrier not retransmitted, thereby cause losing of corresponding data, influenced the transmission quality of communication system significantly.
Summary of the invention
Can't correctly feed back whether to have detected the base station to whole PDSCH of its configuration and the problem that the corresponding data that causes is lost at above-mentioned UE, for this reason, the present invention aims to provide a kind of improved Channel Detection and processing scheme, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, a kind of channel detection method is provided, being applied to terminal is that PDSCH detects to Physical Downlink Shared Channel, wherein, terminal according to PDSCH corresponding physical down control channel be that configuration information among the PDCCH detects the last carrying of PDSCH current data to PDSCH.
Channel detection method according to the present invention comprises: terminal is obtained the index information from the base station, and wherein, index information is set in advance by the base station, is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling; Terminal detects the PDSCH on the corresponding downstream component carrier according to configuration information, and the number of the downlink component carrier of the number of detected downlink component carrier and index information indication is compared; If the number of detected downlink component carrier is not equal to the number of the downlink component carrier of index information indication, terminal feeding back response information not then.
Wherein, index information is carried at and sends to terminal in the configuration information.
And, the bit number N that index information takies
DAIDetermine by following formula, that is,
Wherein, N is the downlink component carrier number in the system, and N is the natural number more than or equal to 1,
Represent to round up operation.
Preferably, index information takies 2 bits.
In addition, if the number of detected downlink component carrier equals the number of the downlink component carrier of index information indication, and the PDSCH institute data carried by data on each downlink component carrier that detects all detects correctly, then terminal correct response message of feedback on predetermined PUCCH.
If the number of detected downlink component carrier equals the downlink component carrier number of index information indication, and the institute of the PDSCH on the downlink component carrier that detects data carried by data does not all detect correct, then terminal feedback error response message on predetermined PUCCH.
Further, response message is detected in the base station on predetermined PUCCH, if do not detect any response message or detect error response message, then the base station resends current data; If detect correct response message, then the base station sends other data.
To achieve these goals, according to a further aspect in the invention, provide a kind of processing method of Channel Detection.
Processing method according to Channel Detection of the present invention comprises: the base station is provided with index information, and index information sent to terminal, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling, and the last carrying of PDSCH need send to the current data of terminal; The base station is detected predetermined PUCCH, if do not detect response message on predetermined PUCCH, then resends current data.
In addition, if base station detected response message on predetermined PUCCH is correct response message, then the base station sends other data; If base station detected response message on predetermined PUCCH is an error response message, then the base station resends current data.
To achieve these goals, according to another aspect of the invention, provide a kind of base station.
Base station according to the present invention comprises: module is set, is used to be provided with index information, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling; First sending module, the index information that is used for to the module setting to be set sends to terminal.
Preferably, above-mentioned base station also comprises: second sending module, be used for sending current data to terminal, and wherein, current data is carried on the PDSCH; Detection module is used for predetermined PUCCH is detected; Scheduler module, being used in the detected response message of detection module is that error response message or detection module do not detect under the situation of response message, dispatches second sending module and resends current data; In the detected response message of detection module is under the situation of correct response message, dispatches second sending module and sends new data.
To achieve these goals, according to also one side of the present invention, provide a kind of terminal.
Terminal according to the present invention comprises: receiver module, be used to receive the configuration information of the PDCCH that the base station sends and the index information that the base station is provided with, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling; Detection module is used for according to the configuration information that receiver module receives the PDSCH on the PDCCH corresponding downstream component carrier being detected; Comparison module is used for the number of the downlink component carrier of the number of detected downlink component carrier and index information indication is compared; Responder module is used for feeding back response information to predetermined PUCCH.
Preferably, above-mentioned terminal also comprises: control module, be used for comparative result scheduling responder module according to comparison module, equal for the number of detected downlink component carrier in the result of comparison module under the situation of number of downlink component carrier of index information indication, if the whole PDSCH institute data carried by data that detects all detects correctly, then dispatch responder module and feed back correct response message, otherwise, scheduling responder module feedback error response message; Be not equal under the situation of number of downlink component carrier of index information indication the decapacitation responder module for the number of detected downlink component carrier in the result of comparison module.
By means of technique scheme one of at least, the present invention is by setting in advance index information and sending to terminal, make terminal the number of detected PDSCH can be compared with the number of the PDSCH of index information indication, according to comparative result to feedback information to predetermined PUCCH, overcome UE of the prior art and can't correctly feed back whether to have detected the base station to whole PDSCH of its configuration and the problem that the corresponding data that causes is lost, and then can avoid transmitting losing of data, can improve the transmission quality of communication system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the data configuration information dropout of the part carrier wave in the correlation technique;
Fig. 2 is the flow chart according to the processing method of the Channel Detection of the inventive method embodiment one;
Fig. 3 is the flow chart according to the channel detection method of the inventive method embodiment two;
Fig. 4 is the flow chart according to the inventive method embodiment one and two Channel Detection scheme;
Fig. 5 is the schematic diagram according to the data configuration information dropout of the part carrier wave of the embodiment of the invention;
Fig. 6 is the block diagram according to the base station of apparatus of the present invention embodiment one;
Fig. 7 is the block diagram according to the terminal of apparatus of the present invention embodiment two.
Embodiment
Functional overview
When being the data configuration information dropout of the part carrier wave in the correlation technique, adopts Fig. 1 the schematic diagram of Bundling feedback method, as shown in Figure 1, the configuration information of the PDCCH of the PDSCH correspondence on the component carrier 4 is lost, therefore UE only detects the PDSCH data on component carrier 1, component carrier 2 and the component carrier 3, according to testing result, be ACK for the HARQ message of three PDSCH.Because UE does not detect the configuration information on the component carrier 4, UE will think does not have downlink data to send on this component carrier 4, therefore, UE is to component carrier 1, HARQ message on component carrier 2 and the component carrier 3 carries out obtaining ACK message behind the Bundling, UE feeding back ACK message to predetermined PUCCH (can be and component carrier 1, component carrier 2, any one correspondence among the PDSCH on the component carrier 3) on, because the base station is detected to be ACK message, then the base station just can not retransmit the data of losing, that is, can not resend data on the component carrier 4.
By above-mentioned process shown in Figure 1, as can be seen, when the configuration information of the PDCCH on certain downlink component carrier is lost, user terminal (User Equipment, abbreviate UE as) just can the PDSCH of this PDCCH correspondence not detected, do not have any feedback information yet, if this moment, UE is correct detection to the PDSCH on other downlink component carriers, then the feedback information of UE after to feedback information Bundling is ACK, that is to say, UE the information on the predetermined PUCCH of feeding back to does not correctly reflect the detection case of UE, and the base station thinks that terminal has correctly detected all PDSCH because detected feedback information is ACK, therefore associative operations such as data re-transmission can not carried out in the base station, have caused losing of downlink data.
Based on this, the invention provides a kind of Channel Detection scheme, by setting in advance index information (can be called the downstream arrangements index information), and send to terminal, make in the down link of number and index information indication of the downlink component carrier that terminal can be shared with the PDSCH that detects to be that the number of the shared downlink component carrier of the PDSCH of terminal scheduling is compared, according to the comparative result feedback information, particularly, when the number of the downlink component carrier that detects in terminal is not equal to the number of downlink component carrier of index information indication, terminal is not to predetermined PUCCH feedback information, if the base station does not detect any information on predetermined PUCCH, represent that then this terminal does not detect all PDSCH, that is to say, exist the configuration information of a PUCCH to lose at least, therefore, the base station will resend data and give terminal.The present invention can reflect correctly that terminal detects the situation of PDSCH, that is to say, correctly reflects the situation whether configuration information of PDCCH is lost, and has avoided causing owing to omission PDSCH in the prior art problem of loss of data.
For the ease of understanding the embodiment of the invention, before the explanation embodiment of the invention, at first the operation principle to downlink data transmission describes.
When the base station when terminal sends downlink data, transmitting downlink data can be come by a plurality of downlink component carriers of dynamic dispatching (component carrier) in the base station, wherein, each downlink component carrier can carry PDSCH and PDCCH, PDSCH and PDCCH are corresponding one by one.Wherein, PDSCH is used to carry the downlink data that the base station sends to the user, and PDCCH is used for carrying and resolves this downlink data configuration information needed.For each downlink component carrier, in data transmission procedure, the base station can be carried on downlink data and the configuration information corresponding with this downlink data among PDSCH and the PDCCH respectively and send to the user, the user detects downlink data among the PDSCH by reading configuration information among the PDCCH, wherein, configuration information comprises the information such as Resource Block at the separating of data on the PDSCH/coded system, data place.
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.Need to prove that if do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
Method embodiment one
According to the embodiment of the invention, a kind of processing method of Channel Detection is provided, preferably be applied to the base station, to solve the problems of the prior art.
Fig. 2 is the flow chart according to the processing method of the Channel Detection of the embodiment of the invention, and as shown in Figure 2, this processing method comprises following flow process (step 202-step 204).
Step 202, the base station is provided with index information, and index information is sent to terminal, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling, that is, and and the number of the downlink component carrier that the PDSCH of carrying current data transmission is shared.Preferably, this index information can be carried in the configuration information of the PDCCH on each downlink component carrier, and like this, terminal just can be known the number of the PDSCH that needs detection when receiving the configuration information of at least one PDCCH.Because PDSCH of carrying on the downlink component carrier, then above-mentioned index information also can be used for indicating the number of down link for the PDSCH of terminal scheduling, below if not otherwise specified, the number of PDSCH just is equivalent to carry the number of the downlink component carrier of PDSCH.
Step 204, the base station is detected predetermined PUCCH, if do not detect response message on predetermined PUCCH, then resends current data.The predetermined PUCCH here is consistent with predetermined PUCCH definition of the prior art, that is, and and with the corresponding PUCCH of certain PDSCH in the step 202.
By above-mentioned steps 202, the base station is provided with index information according to a plurality of PDSCH that are used to carry data of configuration, and this index information is notified to terminal, make terminal can know the number of the PDSCH that needs detection, thereby can avoid the problem that causes loss of data owing to omission PDSCH of the prior art.
The bit number that above-mentioned index information takies is used N
DAIExpression is an example with the LTE-Advance system, if the downlink component carrier number in the LTE-Advance system is N, then N
DAICan determine by following formula:
Wherein, N is the downlink component carrier number in the system, and N is the natural number more than or equal to 1,
Represent to round up operation.Preferably, this N
DAICan be 2.Table 1 shows N
DAIWhen being 2 bits, the corresponding relation of the number of the PDSCH that different index informations and the transmission of the current data of its indication are shared.As shown in table 1, wherein, index information " 00 ", the number of the PDSCH that the current data transmission of indication is shared is 1, index information " 01 ", and the number of the PDSCH that the current data transmission of indication is shared is 2, index information " 10 ", the number of the PDSCH that the current data transmission of indication is shared is 3, index information " 11 ", and the number of the PDSCH that the current data transmission of indication is shared is 4.
Table 1
| Index information | The number of the shared downlink component carrier of PDSCH |
| 0，0 | 1 |
| 0，1 | 2 |
| 1，0 | 3 |
| 1，1 | 4 |
Need to prove, above-mentioned table 1 just schematically shows a kind of relation of the number of the shared downlink component carrier of the PDSCH of index information and its indication, be not limited to the corresponding relation shown in the table 1, following table 2 shows the another kind of corresponding relation of the number of the shared downlink component carrier of the PDSCH of index information and its indication.
Table 2
| Index information | The number of the shared downlink component carrier of PDSCH |
| 0，0 | 1 or 5 or 9 |
| 0，1 | 2 or 6 |
| 1，0 | 3 or 7 |
| 1，1 | 0 or 4 or 8 |
Method embodiment two
According to the embodiment of the invention, a kind of channel detection method is provided, has been applied to the scene that terminal detects PDSCH, wherein, terminal detects PDSCH according to the configuration information among the PDCCH corresponding with PDSCH, and carrying need send to the current data of terminal on PDSCH.Fig. 3 is the flow chart according to the channel detection method of present embodiment, and as shown in Figure 3, this method comprises the steps (step 302-step 306).
Step 304, terminal detects the PDSCH on the corresponding downstream component carrier according to the configuration information among the PDCCH, and the number of the downlink component carrier of the index information indication of the number of detected downlink component carrier and step 302 is compared.
Step 306, if the number of detected downlink component carrier is not equal to the number of the downlink component carrier of index information indication, that is to say, terminal is PDSCH of omission at least, at this moment, terminal is not fed back any message to predetermined PUCCH, any response message that any message here refers to (comprising ACK (Acknowledgement) and NACK (Negative Acknowledgement)).
The base station is detected predetermined PUCCH, for step 306, if the base station does not detect any response message, shows that then terminal does not detect all PDSCH that terminal is given in configuration, and at this moment, the base station resends current data to terminal.
In specific implementation process, if the number of the detected downlink component carrier of terminal equals the number of the downlink component carrier of index information indication, that is to say that terminal does not have omission PDSCH, at this moment, terminal comprises following two kinds for the situation of predetermined PUCCH feedback:
Situation one: terminal all is correct to the detection of whole PDSCH, and according to Bundling mode of the prior art, terminal feeding back ACK message is to predetermined PUCCH.The base station is gone up predetermined PUCCH and is detected, and detected information is ACK message, just think terminal correctly detected the PDSCH of promising its configuration, then, the base station sends other new datas;
Situation two: terminal is wrong to the detection of a PDSCH at least, and according to Bundling mode of the prior art, terminal feedback NACK message is to predetermined PUCCH.The base station is gone up predetermined PUCCH and is detected, and detected information is NACK message, will resend current data to terminal, detects PDSCH again for terminal.
For the situation in situation two and the above-mentioned steps 306, the base station can resend current data, and in the present invention, at these two kinds of different situations, the mode that the base station resends current data can be identical, also can be different, the invention is not restricted to this.
(be called downstream arrangements index (downlink assignmentindex in this example with LTE-Advance system, above-mentioned index information below, abbreviate DAI as) information) to be used for indicating the number of the shared downlink component carrier of PDSCH and configuration information that this index information is carried at PDCCH to send to terminal be example, describe the embodiment of the invention in detail, following DAI information is passed through
Represent.
Receive the PDCCH of each downlink component carrier as UE after, by in the configuration information among the PDCCH
Know the number of the downlink component carrier that the PDSCH that is configured is shared.Suppose, the UE actual detected to the number of PDSCH be
If
Represent that then UE has detected all PDSCH that are configured, that is to say that the configuration information that does not have a PDCCH on the downlink component carrier is lost and the problem of the PDSCH omission that causes, for above-mentioned situation one, terminal is to predetermined PDCCH feeding back ACK message; If
Represent that then UE does not detect all PDSCH that are configured, that is to say, at least exist the configuration information of PDCCH corresponding on the downlink component carrier to lose, at this moment, terminal is not fed back any response message to predetermined PUCCH, and the base station is when detecting predetermined PUCCH, if do not detect any response message like this, then carry out associative operations such as data re-transmission, so just avoided the problem of losing of downlink data effectively.
Fig. 4 is the flow chart according to said method embodiment one and two Channel Detection scheme, and as shown in Figure 4, this Channel Detection scheme comprises the steps (step 402-step 406):
Step 402, base station be according to schedule information, for each UE carries out the PDSCH scheduling of resource of downlink component carrier, and with the configuration information of the corresponding PDCCH of PDSCH in add DAI information, this DAI information is used to indicate the number of the shared downlink component carrier of PDSCH;
Step 404, UE detects corresponding PDSCH according to the configuration information of PDCCH, and according to the DAI information in the configuration information, feed back NACK message or ACK message or do not feed back any response message to predetermined PUCCH, this step is corresponding to above-mentioned steps 304 and step 306;
Step 406, the base station judges whether to retransmit current data or sends new data according to the testing result to predetermined PUCCH, if detect NACK message or do not detect any message, then retransmits current data, if detect ACK message, then send new data.Particularly, the detailed description to this step 406 can repeat no more here with reference to above-mentioned description to Fig. 3.
Fig. 5 is the schematic diagram according to the channel detection method of the embodiment of the invention.The downlink bandwidth of supposing the LTE-Advanced system is 80MHz, is polymerized by the downlink component carrier of 4 20MHz, is used for the PDSCH transmission for four downlink component carriers of certain UE configuration in actual disposition.As shown in Figure 5, according to table 1, add the DAI information of dibit in the configuration information in the pairing PDCCH of the PDSCH of each downlink component carrier, owing to be used for the PDSCH transmission for UE has disposed four descending carriers, then this moment, the DAI bit information was " 11 ", and four PDSCH on the downlink component carrier are dispatched in expression altogether.
Among Fig. 5, the UE actual detected to the PDSCH number of downlink component carrier be 3 (PDSCH on component carrier 1, component carrier 2 and the component carrier 3), that is,
And according to the DAI information on component carrier 1, component carrier 2 and the component carrier 3, can know
Because
Then terminal can learn that the configuration information that has the PDCCH on the downlink component carrier is lost and the situation of the PDSCH omission that causes, therefore, UE do not feed back any message to predetermined PUCCH (this predetermined PUCCH can be with component carrier 1, component carrier 2 and component carrier 3 on PDSCH in any one is corresponding) on, so that the base station such as retransmits at associative operation after detecting predetermined PUCCH, so just avoided the problem of loss of data effectively.
Need to prove that for convenience of description, above-mentioned form with step has illustrated and described the technical scheme of method embodiment of the present invention, the above-mentioned step that illustrates can be carried out in the computer system such as a set of computer-executable instructions.Though in the description process, provided logical order, in some cases, can carry out step shown or that describe with the order that is different from herein.
Device embodiment one
According to the embodiment of the invention, a kind of base station is provided, preferentially be used for realizing the processing method of the Channel Detection of said method embodiment one, Fig. 6 is the block diagram of this base station, as shown in Figure 6, this base station comprises: module 60, first sending module 62, second sending module 64, receiver module 66 and scheduler module 68 are set, below each module are described in detail.
Module 60 is set, is used to be provided with index information, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling, perhaps is used to indicate the number of the shared PDSCH of current data transmission; First sending module 62 is connected to module 60 is set, and the index information that is used for to module 60 settings to be set sends to terminal; Second sending module 64 is used for sending current data to terminal, and wherein, current data is carried on the PDSCH; Detection module 66 is used for predetermined PUCCH (PDSCH on the PUCCH that this is predetermined and the downlink component carrier is corresponding) is detected; Scheduler module 68, be connected to the detection module 66 and second sending module 64, be used for second sending module 64 is dispatched, particularly, according to detection module 66 detected response messages second sending module 64 is dispatched, wherein, if detection module 66 detects NACK message or do not detect any response message, then dispatch second sending module 64 and resend current data; If detection module 66 detects ACK message, then dispatch second sending module 64 and send new data.
In specific implementation process, above-mentioned first sending module 62 and second sending module 64 can be unified setting, be used to send index information and data, the description of the index information in the present embodiment and the implementation of above-mentioned each module can be repeated no more here with reference to said method embodiment one.
By above description as can be seen, by module 60 is set index information is set, and this index information is sent to terminal by first sending module 62, make that terminal can be according to index information, judge whether the situation of omission PDSCH, thereby can avoid terminal of the prior art under the situation of omission PDSCH, cause the problem of loss of data to predetermined PUCCH feeding back ACK message, and then can improve the transmission quality of communication system.
Device embodiment two
According to the embodiment of the invention, a kind of terminal is provided, preferentially be used for realizing the method for the Channel Detection of said method embodiment two, Fig. 7 is the block diagram of this terminal, as shown in Figure 7, this terminal comprises: receiver module 70, detection module 72 comparison modules 74, responder module 76 and control module are described in detail each module below 78.
Receiver module 70, be used to receive the configuration information of the PDCCH that the base station sends and the index information that the base station is provided with, wherein, index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling, perhaps is used for the number of the shared PDSCH of current data transmission; Detection module 72 is connected to receiver module 70, is used for according to the configuration information that receiver module 70 receives the PDSCH on the downlink component carrier of PDCCH correspondence being detected; Comparison module 74, be connected to detection module 72 and receiver module 70, the number that is used for the downlink component carrier (perhaps PDSCH) of index information indication that the number of detection module 72 detected downlink component carriers (perhaps PDSCH) and receiver module 70 are received compares; Responder module 76 is used for feeding back response information to predetermined PUCCH (PDSCH on the PUCCH that this is predetermined and the downlink component carrier is corresponding); Control module 78, be connected to comparison module 74 and responder module 76, be used for comparative result according to comparison module 74, enable or decapacitation responder module 76, particularly, if being the number of detected downlink component carrier (perhaps PDSCH), the comparative result of comparison module 74 is not equal to the number of the downlink component carrier (perhaps PDSCH) of index information indication, then do not carry out responder module 76, if being the number of detected downlink component carrier (perhaps PDSCH), the comparative result of comparison module 74 equals the number of the downlink component carrier (perhaps PDSCH) of index information indication, scheduling responder module 76, in terminal the whole PDSCH institute data carried by data that detects is all detected under the correct situation, responder module 76 feeding back ACK message are to predetermined PUCCH, otherwise responder module 76 feedback NACK message are to predetermined PUCCH.
In specific implementation process, the description of the index information in the present embodiment and the implementation of above-mentioned each module can be repeated no more here with reference to said method embodiment two.
By above description as can be seen, present embodiment can avoid terminal of the prior art under the situation of omission PDSCH, causes the problem of loss of data to predetermined PUCCH feeding back ACK message, and then can improve the transmission quality of communication system.
In sum, by setting in advance index information, and send to terminal, make the number of the downlink component carrier (perhaps PDSCH) that terminal can be indicated the number of the downlink component carrier (perhaps PDSCH) that detects and index information compare, according to comparative result to predetermined PUCCH feedback information, by the present invention can correctly detect terminal whether omission PDSCH, thereby can avoid the problem that causes loss of data owing to omission PDSCH of the prior art, and then can avoid losing of downlink data, can improve the transmission quality of communication system.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. channel detection method, being applied to terminal is that PDSCH detects to Physical Downlink Shared Channel, wherein, described terminal according to described PDSCH corresponding physical down control channel be that configuration information among the PDCCH detects described PDSCH, described PDSCH goes up the carrying current data, it is characterized in that described method comprises:
Terminal is obtained the index information from the base station, and wherein, described index information is set in advance by described base station, is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of described terminal scheduling;
Described terminal detects the PDSCH on the corresponding downstream component carrier according to described configuration information, and the number of the downlink component carrier of the number of detected downlink component carrier and the indication of described index information is compared;
If the number of described detected downlink component carrier is not equal to the number of the downlink component carrier of described index information indication, then described terminal is feeding back response information not.
2. method according to claim 1 is characterized in that, described index information is carried at and sends to described terminal in the described configuration information.
3. method according to claim 1 is characterized in that, determines the bit number N that described index information takies by following formula
DAI:
Wherein, N is the downlink component carrier number in the system, and N is the natural number more than or equal to 1,
Represent to round up operation.
4. method according to claim 1 is characterized in that, described index information takies 2 bits.
5. method according to claim 1, it is characterized in that, if the number of described detected downlink component carrier equals the number of the downlink component carrier of described index information indication, and the PDSCH institute data carried by data on each downlink component carrier that detects all detects correctly, and then described terminal is the correct response message of feedback on predetermined PUCCH.
6. method according to claim 1, it is characterized in that, if the number of described detected downlink component carrier equals the downlink component carrier number of described index information indication, and the institute of the PDSCH on the downlink component carrier that detects data carried by data does not all detect correct, and then described terminal is the feedback error response message on predetermined PUCCH.
7. according to each described method of claim 1 to 6, it is characterized in that, response message is detected in described base station on described predetermined PUCCH, if do not detect any response message or detect error response message, then described base station resends described current data; If detect correct response message, then described base station sends other data.
8. the processing method of a Channel Detection is characterized in that, described method comprises:
The base station is provided with index information, and described index information sent to terminal, wherein, described index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of described terminal scheduling, and described PDSCH goes up the current data that carrying need send to terminal;
Described base station is detected predetermined PUCCH, if do not detect response message on described predetermined PUCCH, then resends described current data.
9. method according to claim 8 is characterized in that, it is one of following that described method also comprises:
If described base station detected response message on described predetermined PUCCH is correct response message, then described base station sends other data;
If described base station detected response message on described predetermined PUCCH is an error response message, then described base station resends described current data.
10. a base station is characterized in that, comprising:
Module is set, is used to be provided with index information, wherein, described index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of terminal scheduling;
First sending module is used for the described index information that the module setting is set is sent to terminal.
11. base station according to claim 10 is characterized in that, described base station also comprises:
Second sending module is used for sending current data to described terminal, and wherein, described current data is carried on the described PDSCH;
Detection module is used for predetermined PUCCH is detected;
Scheduler module, being used in the detected response message of described detection module is that error response message or described detection module do not detect under the situation of response message, dispatches described second sending module and resends described current data; In the detected response message of described detection module is under the situation of correct response message, dispatches described second sending module and sends new data.
12. a terminal is characterized in that, comprising:
Receiver module is used to receive the configuration information of the PDCCH that the base station sends and the index information that the base station is provided with, and wherein, described index information is used for indicating the number of down link for the shared downlink component carrier of the PDSCH of described terminal scheduling;
Detection module is used for according to the described configuration information that described receiver module receives the PDSCH on the described PDCCH corresponding downstream component carrier being detected;
Comparison module is used for the number of the downlink component carrier of the number of detected downlink component carrier and the indication of described index information is compared;
Responder module is used for feeding back response information to predetermined PUCCH.
13. terminal according to claim 12 is characterized in that, described terminal also comprises:
Control module, be used for dispatching described responder module according to the comparative result of described comparison module, equal for the number of detected downlink component carrier in the result of described comparison module under the situation of number of downlink component carrier of described index information indication, if the whole PDSCH institute data carried by data that detects all detects correctly, then dispatch described responder module and feed back correct response message, otherwise, dispatch described responder module feedback error response message; Be not equal under the situation of number of downlink component carrier of described index information indication the described responder module of decapacitation for the number of detected downlink component carrier in the result of described comparison module.
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