CN102378373A - Control channel transmission and resource determination method, base station and terminal - Google Patents
Control channel transmission and resource determination method, base station and terminal Download PDFInfo
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- CN102378373A CN102378373A CN2010102561943A CN201010256194A CN102378373A CN 102378373 A CN102378373 A CN 102378373A CN 2010102561943 A CN2010102561943 A CN 2010102561943A CN 201010256194 A CN201010256194 A CN 201010256194A CN 102378373 A CN102378373 A CN 102378373A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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Abstract
The invention discloses a control channel resource transmission and configuration method, a base station and a terminal to improve the utilization ratio and the transmission efficiency of control channel resources. The method comprises the steps of: aiming at at least one downlink subframe, in the downlink subframe, instructing the base station to allocate one uplink control channel resource in an uplink control channel resource set to user equipment (UE) by a base station end, wherein the designated uplink control channel resource set comprises at least two types of uplink channel control resources and each type of uplink control channel resources correspond to one uplink control channel transmission format; transmitting a physical downlink control channel (PDCCH) in the at least one downlink subframe; and receiving uplink control signals fed back by the UE on the allocated uplink control channel resource. By adopting the technical scheme, the base station can well configure the uplink control channel resource used for transmitting the uplink control signals for the UE, resource are not required to be reserved in each uplink carrier for downlink carriers corresponding to the uplink carriers and therefore the utilization ratio and the transmission efficiency of the control channel resources are improved.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of control channel transmission and resource determining method, a kind of base station and a kind of user terminal.
Background technology
At present, in long-term evolution multi-carrier system, possibly there is the different user terminal of multiple polymerizing power; When using the spectrum aggregating technology, the base station is according to the polymerizing power of user terminal and concrete business demand, for user terminal disposes asymmetric carrier aggregation; Generally speaking, DL (Down Link, down link) carrier number is greater than UL (Up Link; Up link) carrier number; Therefore, if will support the asymmetric carrier aggregation of various ratios flexibly, then system need all be that each self-corresponding descending carrier is reserved certain feedback resources in each up-link carrier; So that user terminal is receiving the packet that the base station issues and is determining ACK (ACKnowledge Character; Acknowledge character) or during NACK (Negative ACKnowledgCharacter, NACK character), from the feedback resources that up-link carrier is reserved, chooses certain resource to base station feedback ACK or NACK.
In long-term evolution multi-carrier system,, generally all be to adopt HARQ (Hybrid Automatic Repeat reQuest mixes automatic repeat requests) technology to realize for improving reliability of data transmission.After descending HARQ function was opened, user terminal was deciphered the downlink data packet that receives, if decoding is correctly then passed through the up-link carrier reserved resource to base station feedback ACK; If decoding failure then passes through the up-link carrier reserved resource to base station feedback NACK, retransmit this downlink data packet with the request base station.After descending continuous dispatching service ending, the base station is sent the SPS resource to user terminal and is discharged indication, with informing user terminal delivery system all this time professional resources that are used for for its distribution; User terminal is correctly receiving after SPS resource that the base station issues discharges indication, to base station feedback ACK.
For long-term evolution multi-carrier system, for supporting that than LTE (Long Term Evolution, Long Term Evolution) the wideer system bandwidth of system, like the system bandwidth for support 100MHz, system can directly distribute the system bandwidth of 100MHz, and is as shown in Figure 1; Perhaps, as shown in Figure 2, with all or part of spectrum aggregating of distributing to other system, gather into the system bandwidth of 100MHz, to supply with long-term evolution multi-carrier system; Under this kind situation, the up-downgoing carrier wave can asymmetricly dispose in the system, can take the individual carrier wave of N (N >=1) like user terminal and carry out downlink transfer, takies the individual carrier wave of M (M >=1) and carries out uplink.
At present; Standardization effort has been accomplished the feedback scheme of middle ACK of LTE system (like Rel-8) or NACK basically; To each work carrier wave, define descending control signaling, downlink data, upstream control signaling and upstream data and transmission relation each other respectively; The transmission data are following with the control means of signaling in the LTE system:
To FDD (Frequency Division Duplexing, FDD) system, Fig. 3 A, Fig. 3 B are respectively the structural representation that the FDD system carries out downlink transfer, uplink; Among Fig. 3 B, the marginal zone of upstream control signaling band occupancy, and transmit through the frequency hopping mode, promptly in two time slots in a sub-frame of uplink, adopt different frequency range transmission upstream control signaling; This kind transmission means; Owing to can't dynamically know the quantity that needs the control channel of carrying in the sub-frame of uplink; Therefore, need in sub-frame of uplink, reserve certain resource and be used for the ascending control channel transmission, like the reserved resource among Fig. 3 B (with the zone of oblique line filling).
To TDD (Time Division Duplexing; Time division duplex) system; Fig. 4 carries out the structural representation of up-downgoing transmission for the TDD system; In like manner, reserve certain resource in the sub-frame of uplink in the TDD system and be used for the ascending control channel transmission, the zone of reserved resource for filling with oblique line among the figure.
In the prior art; ACK or NACK feedback for dynamic dispatching; PDCCH (the Physical Downlink Control Channel of user terminal from receiving; Physical downlink control channel) numbering of the pairing CCE of descending control signaling (Control Channel Element, control channel element) (is used n in
CCEExpression), from up-link carrier, determine the numbering of the resource that is used for feeding back ACK or NACK in the reserved resource and (use n
ANExpression), utilize the n that is numbered that determines again
ANResource to base station feedback ACK or NACK; Be in the prior art, each PDCCH all corresponding an available uplink control channel resource.
Adopt the ACK of prior art or the transmission means of NACK, owing to need in each up-link carrier, reserve the resource that is used for feeding back ACK or NACK for its corresponding descending carrier, because in system.The quantity of user terminal and number of carriers are all huger; There is bigger channel resource waste in the up-link carrier; Serious also may causing do not have uplink resources available to carry out transfer of data; Therefore, adopt the method for salary distribution of the control channel resource of prior art, have the problem that the channel resource waste is big, the channel resource utilance is lower and efficiency of transmission is lower.
Summary of the invention
The present invention provides a kind of control channel transmission and resource determining method, base station and terminal, to improve the utilance and the efficiency of transmission of control channel resource.
A kind of control channel transmission and resource determining method comprise:
The base station is at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Downlink physical control channel PDCCH is transmitted in the base station in said at least one descending sub frame;
The base station receives the uplink control signal of said UE feedback on the uplink control channel resource that distributes.
A kind of control channel transmission and resource determining method comprise:
User terminal UE receives physical downlink control channel PDCCH at least one descending sub frame that the base station issues; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Said UE chooses the uplink control channel resource that is used for the feeding back uplink control signal in the indicated uplink control channel resource of said at least one descending sub frame;
Said UE is the feeding back uplink control signal in the uplink control channel resource of choosing.
A kind of base station comprises:
Resource configuration unit; Be used at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Transmit-Receive Unit is used at said at least one descending sub frame transmission downlink physical control channel PDCCH; And, be used on the uplink control channel resource that distributes, receiving the uplink control signal that said UE feeds back.
A kind of user terminal comprises:
Transmit-Receive Unit; At least one descending sub frame that is used for issuing in the base station receives physical downlink control channel PDCCH; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; And, be used for confirming the uplink control channel resource feeding back uplink control signal of unit selection in resource;
Resource is confirmed the unit, is used for choosing the ascending control channel money that is used for the feeding back uplink control signal at the indicated uplink control channel resource of said at least one descending sub frame.
In the embodiment of the invention; To at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; Downlink physical control channel PDCCH is transmitted in the base station in said at least one descending sub frame; The base station receives the uplink control signal of said UE feedback on the uplink control channel resource that distributes.Adopt technical scheme of the present invention; Because the uplink control channel resource that is used for the feeding back uplink control signal is specified for user terminal in advance in the base station; Therefore; Need in each up-link carrier, not reserve the feedback resources that is used for the feeding back uplink control signal, therefore, improve the utilance and the efficiency of transmission of control channel resource for its corresponding descending carrier.
Description of drawings
Fig. 1 is system's broadband sketch map of single-frequency spectral system in the prior art;
Fig. 2 is the sketch map of the up-downgoing transmission of prior art intermediate frequency spectrum paradigmatic system;
Fig. 3 A, Fig. 3 B are respectively the sketch map of downlink transfer, uplink in the prior art FDD system;
Fig. 4 is the sketch map that up-downgoing is transmitted in the TDD system in the prior art;
Fig. 5 is the method flow diagram of feeding back uplink control signal in the embodiment of the invention;
Fig. 6 is the mapping relations sketch map of feedback resources of indication information and the distribution of DCI in the embodiment of the invention;
Fig. 7 merges the sketch map that the user terminal that transmits distributes feedback resources for being directed against in the embodiment of the invention in the TDD system for being configured to uplink control signal;
Fig. 8 is the sketch map that is configured to the user terminal distribution feedback resources of uplink control signal multiplexing transmission for being directed against in the embodiment of the invention in the TDD system;
Fig. 9 is the structural representation of base station in the embodiment of the invention;
Figure 10 is the structural representation of user terminal in the embodiment of the invention.
Embodiment
Above-mentioned technical problem to the prior art existence; The embodiment of the invention provides definite method of a kind of control channel transmission and resource; This method comprises: in base station end; The base station is at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame (is that the base station is at least one descending sub frame; Through downlink physical control channel PDCCH is that user terminal UE distributes a uplink control channel resource in specifying the uplink control channel resource set), said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; Downlink physical control channel PDCCH is transmitted in the base station in said at least one descending sub frame; The base station receives the uplink control signal of said UE feedback on the uplink control channel resource that distributes.In subscriber terminal side; User terminal UE receives physical downlink control channel PDCCH at least one descending sub frame that the base station issues; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; Said UE chooses the uplink control channel resource that is used for the feeding back uplink control signal in the indicated uplink control channel resource of said at least one descending sub frame; Said UE is feeding back uplink control signal (uplink control signal can comprise ACK, NACK) in the uplink control channel resource of choosing.Adopt technical scheme of the present invention; Because the uplink control channel resource that is used for the feeding back uplink control signal is specified for user terminal in advance in the base station; Therefore; Need in each up-link carrier, not reserve the feedback resources that is used for the feeding back uplink control signal, therefore, improve the utilance and the efficiency of transmission of control channel resource for its corresponding descending carrier.
In the embodiment of the invention,, need one group of control channel resource in each subframe of user terminal based on many bit ACK of channel selection or the multiplexing transmission of NACK; ACK or NACK for the many bits multiplexing transmission of using DFT-S-OFDM or use PUCCH format 1a/1b merge transmission, and user terminal only needs a control channel resource in each subframe.
Need to prove; Owing to relate to the notion of " feedback window " in the embodiment of the invention, for further being it will be appreciated by those skilled in the art that at this; Carry out introduction to a certain extent for " feedback window "; Because " feedback window " is prior art, therefore, do not carry out detailed description at this.
At present, in the LTE-A system, can support the polymerization of 5 carrier waves at most, user terminal transmits a plurality of descending carriers and the pairing uplink control signal of descending sub frame, promptly so-called " feedback window " in same sub-frame of uplink when the feeding back uplink control signal.In the FDD system, when carrying out carrier aggregation for user terminal, the size of feedback window participates in the quantity of the descending carrier of polymerization; In the TDD system; The size of feedback window is (N * M); Wherein, N is the quantity that user terminal is participated in the descending carrier of polymerization when carrying out carrier aggregation, M be need be in same sub-frame of uplink the quantity of the descending sub frame of feeding back uplink control signal; The value of M is confirmed according to the configuration and the sub-frame of uplink number of up-downgoing carrier number, but the value reference table 1 of M.
Table 1 is a down link combining and configuring parameter in the TDD system
Below in conjunction with Figure of description technical scheme of the present invention is carried out detailed description.
Referring to Fig. 5, be the method flow diagram that control channel transmission and resource in the embodiment of the invention are confirmed, the method comprising the steps of:
Downlink data packet is sent to user terminal in step 502, base station; And in each descending sub frame in this downlink data packet; Through PDCCH is that user terminal distributes a uplink control channel resource in specifying the uplink control channel resource set, and the uplink control channel resource that distributes is notified to user terminal.
In this step, specify in the uplink control channel resource set to comprise at least one type of uplink control channel resource.First kind uplink control channel resource confirms that by the high-level signaling configuration ascending control channel transformat that this first kind uplink control channel resource is corresponding is DFT-S-OFDM, PUCCH format 1b withchannel selection or PUCCH format 1a/1b; Specify second type of uplink control channel resource in the uplink control channel resource set to confirm that by the sequence number of the CCE of said PDCCH the ascending control channel transformat that this second type of uplink control channel resource is corresponding is PUCCH format 1a/1b or PUCCHformat 1b with channel selection.
The downlink data packet that step 503, user terminal issue according to the base station is determined corresponding uplink control signal.
The corresponding uplink control signal that step 504, user terminal are determined to base station feedback in the uplink control channel resource of base station appointment.
In the above-mentioned steps 501; The base station distributes N to be used for the feeding back uplink control signal (embodiment of the invention through the semi-static user terminal that is of high-level signaling; Uplink control signal can comprise ACK, NACK) uplink control channel resource; And the appointment uplink control channel resource set corresponding with this user terminal according to identification information (like the numbering) generation of this N uplink control channel resource; Comprise N element in this appointment uplink control channel resource set, each element is corresponding to the numbering of a uplink control channel resource.The base station sends to relevant user terminals through the appointment uplink control channel resource set that high-rise RRC (Radio Resource Control, radio resource control) signaling will generate.
Preferably, for improving resource utilization, distribute to N control channel resource of user terminal in the embodiment of the invention and can also be shared by other user terminals; The base station is through scheduling restriction, each control channel resource of a plurality of user terminal time-sharing multiplexs, thus avoid a plurality of user terminals to adopt same control channel resource at one time and caused the problem of control channel resource collision.
In the above-mentioned steps 502; The base station is that user terminal distributes after the uplink control channel resource; Can the uplink control channel resource that distribute be notified the uplink control channel resource that the specified bytes indication of DL grant distributes to user terminal through transmission descending scheduling indication DL grant on PDCCH.
The bit number of the specified bytes of DL grant is set to:
In the formula (1), L is the bit number of specified bytes, and N is for specifying the total quantity of the uplink control channel resource that is comprised in the uplink control channel resource set.
Preferably, in the above-mentioned steps 504, user terminal is that a plurality of sub-frame of uplink are confirmed uplink control channel resource, and definite uplink control channel resource is corresponding to same sub-frame of uplink; If the uplink control channel resource of confirming comprises a first kind uplink control channel resource at least; User terminal uses up-to-date uplink control channel resource transmitting uplink control information in the first kind uplink control channel resource of confirming, said up-to-date uplink control channel resource is last pairing uplink control channel resource of descending sub frame that is received by user terminal in a plurality of descending sub frames (uplink control channel resource that these a plurality of descending sub frames are corresponding is a first kind uplink control channel resource).
Preferably, the uplink control channel resource that be used to transmit uplink control signal specified for this user terminal according to the mode of user terminal feeding back uplink control signal in the base station from specify the uplink control channel resource set, be specially:
The mode of user terminal feeding back uplink control signal is for merging transmission; Be that user terminal is merged into a uplink control signal with the corresponding uplink control signal of a plurality of dispatching downlink subframes in the packet: as if the corresponding implicit expression resource of a unique PDCCH is arranged on the main carrier that is used for transmitting downlink data bag descending sub frame, the base station indicating user terminal adopts the corresponding implicit expression resource of this PDCCH to come the feeding back uplink control signal; Otherwise the uplink control channel resource feeding back uplink control signal of a current ability usefulness is chosen in the base station from specify uplink control channel resource.
The mode of user terminal feeding back uplink control signal is a multiplexing transmission; Promptly need the corresponding uplink control signal of each dispatching downlink subframe of user terminal transmission: if PDCCH data packets for transmission on main carrier is only dispatched in the base station in descending sub frame, the base station indicating user terminal uses the corresponding uplink control signal of each dispatching downlink subframe of the corresponding implicit expression resource transmission of this PDCCH; Otherwise the uplink control channel resource of a current ability usefulness is chosen in the base station from specify the uplink control channel resource set, and indicating user terminal uses the corresponding uplink control signal of each dispatching downlink subframe of uplink control channel resource feedback of this appointment.
Preferably; For whether all descending sub frames that guarantee the packet that the base station can be confirmed to issue have all successfully sent to user terminal; To guarantee reliability of data transmission; In the embodiment of the invention; When the corresponding uplink control channel resource of specified bytes of the DL grant of all descending sub frames that receive when user terminal all be the implicit expression resource, user terminal was according to the uplink control channel resource of the specified bytes correspondence of the DL grant in last dispatching downlink subframe of being received in the feedback window, feeding back uplink control signal.
For making in the clearer understanding of those skilled in the art technical scheme of the present invention, come technical scheme of the present invention is carried out detailed description with a concrete instance below.
Suppose that the base station has been distributed 3 uplink control channel resources that are used for the feeding back uplink control signal through high-level signaling to user terminal, these 3 uplink control channel resource corresponding identification information, as be numbered resource 1, resource 2, resource 3.The base station generates the set of appointment uplink control channel resource for being { implicit expression resource, resource 1, resource 2, resource 3} according to this user terminal that is numbered of 3 uplink control channel resources that distribute; Can know that according to formula (1) specified bytes of DL grant is 2 bits, the mapping relations that obtain specified bytes and uplink control channel resource are as shown in Figure 6.Among Fig. 6; When the specified bytes of DL grant is " 00 "; The implicit expression resource that the PDCCH that its corresponding uplink control channel resource is a user terminal is corresponding, promptly the base station indicating user terminal uses the corresponding implicit expression resource of PDCCH to transmit corresponding uplink control signal; When the specified bytes of DL grant was " 01 ", its corresponding uplink control channel resource was a resource 1 of distributing to user terminal, and promptly the base station indicating user terminal uses the corresponding uplink control signal of resource 1 transmission; When the specified bytes of DL grant was " 10 ", its pairing uplink control channel resource was a resource 2 of distributing to user terminal, and promptly the base station indicating user terminal uses the corresponding uplink control signal of resource 2 transmission; When the specified bytes of DL grant was " 11 ", its pairing uplink control channel resource was a resource 3 of distributing to user terminal, and promptly the base station indicating user terminal uses the corresponding uplink control signal of resource 3 transmission.
In base station end; When the mode of judges terminal feedback uplink control signal is transmitted for merging; To each descending sub frame in the packet, if be used to transmit when the corresponding implicit expression resource of a unique PDCCH is arranged on the main carrier of this descending sub frame, specified bytes " 00 " is carried in the base station in the DL of this descending sub frame grant; Otherwise specified bytes " 01 ", " 10 " or " 11 " are carried in the base station in the DL of this descending sub frame grant.
In base station end; When the mode of judges terminal feedback uplink control signal is multiplexing transmission, to each descending sub frame in the packet, if a packet has only been dispatched in the base station on this descending sub frame; And when this packet transmits on main carrier; Specified bytes " 00 " is carried in the base station in the DL of this descending sub frame grant, otherwise specified bytes " 01 ", " 10 " or " 11 " are carried in the base station in the DL of this subframe grant.
In conjunction with practical application, the embodiment of the invention is carried out further detailed description from the control channel resource allocation of FDD system and TDD system respectively to the utilization of implicit expression resource.
To the FDD system:
In a plurality of descending sub frames that user terminal receives; When having the specified bytes " 00 " of DL grant of a certain descending sub frame; No matter the mode of this user terminal feeding back uplink control signal how; User terminal all uses PUCCH format 1a/1b at the corresponding corresponding uplink control signal of implicit expression transmitted over resources of PDCCH; As: when the mode of user terminal feeding back uplink control signal is transmitted for merging; User terminal adopts the ascending control channel transformat (like PUCCH format 1b with channelselection or PUCCH format 1a/1b) corresponding with the implicit expression resource, the uplink control signal after the corresponding implicit expression transmitted over resources of PDCCH merges; When the mode of user terminal feeding back uplink control signal is a multiplexing transmission, user terminal adopts the ascending control channel transformat (like DFT-S-OFDM) corresponding with this implicit expression resource then in the corresponding implicit expression resource of PDDCH, to transmit the corresponding uplink control signal of each dispatching downlink subframe.
To the TDD system:
The mode of user terminal feeding back uplink control signal is for merging transmission; When the implicit expression resource of unique PDCCH correspondence was arranged on the main carrier of a certain descending sub frame that user terminal receives, user terminal adopted ascending control channel transformat (like PUCCH format 1b with channelselection, PUCCH format 1a/1b) in this PDCCH corresponding implicit expression resource the feeding back uplink control signal corresponding with this implicit expression resource;
Preferably; For whether all subframes that guarantee the packet that the base station can be confirmed to issue have all successfully sent to user terminal; To guarantee reliability of data transmission; In the embodiment of the invention; When the corresponding uplink control channel resource of specified bytes of the DL grant of all descending sub frames that receive when user terminal is the implicit expression resource, the uplink control channel resource that the specified bytes in the also optional data fetch packet of user terminal among the DL grant of last dispatching downlink subframe is corresponding, the uplink control signal after transmission merges;
The mode of user terminal feeding back uplink control signal is a multiplexing transmission; User terminal adopts the ascending control channel transformat corresponding with the implicit expression resource; In the end in the uplink control channel resource of the specified bytes of the DL grant of dispatching downlink subframe correspondence; Feed back the corresponding uplink control signal of each descending sub frame, specific as follows:
If the base station is when the specified bytes of the DL of a certain descending sub frame that feeds back to user terminal grant is non-" 00 ", then the base station also is the specified bytes of above-mentioned non-" 00 " in the specified bytes of the DL of the follow-up descending sub frame that feeds back to user terminal grant.
The mode of user terminal feeding back uplink control signal is that channel is selected multiplexing transmission; When if the specified bytes among the DL grant of all descending sub frames that user terminal receives is " 00 "; User terminal uses PUCCHformat 1a/1b on the corresponding implicit expression resource of PDCCH, to carry out the selection of uplink control channel resource, and in the uplink control channel resource of selecting, transmits the corresponding uplink control signal of each descending sub frame; If the specified bytes among the DL grant of a plurality of descending sub frames of the further part that receives of user terminal is identical and when all being non-" 00 "; Then user terminal adopts the ascending control channel transformat (like PUCCH format 1a/1b, PUCCH format 1b with channel selection) corresponding with taking the implicit expression resource, the corresponding uplink control signal of each descending sub frame of transmission in the corresponding non-implicit expression resource of this specified bytes.
The mode of user terminal feeding back uplink control signal is the DFT-S-OFDM multiplexing transmission; When the specified bytes among the DL grant of all descending sub frames that user terminal receives was " 00 ", user terminal used PUCCH format 1a/1b corresponding uplink control signal of each descending sub frame of transmission in the corresponding implicit expression resource of PDCCH; If the specified bytes among the DL grant of the further part descending sub frame that user terminal receives is identical and when all be non-" 00 ", then user terminal uses the uplink control signal of DFT-S-OFDM each descending sub frame correspondence of transmission in the corresponding non-implicit expression resource of specified bytes.
Come the feedback of the uplink control signal of above-mentioned TDD system is carried out more clear, detailed description with concrete instance below.
Referring to Fig. 7, merge the sketch map that the user terminal that transmits distributes feedback resources for being directed against in the embodiment of the invention in the TDD system for being configured to uplink control signal, among Fig. 7:
Suppose that the packet that user terminal receives comprises four descending sub frames; Represent with descending sub frame 1, descending sub frame 2, descending sub frame 3 and descending sub frame 4 respectively; A packet has been called at descending sub frame 1, descending sub frame 2 and 4 of descending sub frames in the base station; And descending sub frame 1, descending sub frame 2 and descending sub frame 4 all transmit on main carrier respectively, and therefore, the specified bytes among the pairing DL grant of this three sub-frame is " 00 " (being the implicit expression resource); And the data of descending sub frame 3 are transmitted on subcarrier, and the specified bytes among this descending sub frame 3 pairing DL grant is " 01 "; Uplink control signal after the uplink control signal that user terminal is corresponding with these four descending sub frames merges feeds back to the base station on the corresponding implicit expression resource of PDCCH.
Referring to Fig. 8, be the sketch map that is configured to the user terminal distribution feedback resources of uplink control signal multiplexing transmission for being directed against in the embodiment of the invention in the TDD system, among Fig. 8:
Suppose that the packet that user terminal receives comprises four descending sub frames; Represent with descending sub frame 1, descending sub frame 2, descending sub frame 3 and descending sub frame 4 respectively; A packet has only been called in the base station on descending sub frame 1, descending sub frame 2; And descending sub frame 1, descending sub frame 2 all transmit on main carrier respectively, and therefore, the specified bytes among the DL grant of this descending sub frame 1, descending sub frame 2 correspondences is " 00 " (being the implicit expression resource); And a plurality of packets have been called in the base station on descending sub frame 3, so the specified bytes among the descending sub frame 3 pairing DL grant is " 01 " (being non-implicit expression resource); A packet is only called in the base station in descending sub frame 4; And descending sub frame 4 transmits on main carrier; Though descending sub frame 4 satisfies the condition of using the implicit expression resource, because the specified bytes among the DL grant of its front descending sub frame 3 is " 01 "; Therefore, the specified bytes among the DL grant of descending sub frame 4 also is " 01 ".User terminal is the corresponding uplink control signal of each dispatching downlink subframe of transmission in " 01 " corresponding uplink control channel resource.
In the embodiment of the invention; Specified bytes among the DL grant is not limited in a plurality of uplink control channel resources that bits such as usefulness " 00 ", " 01 ", " 10 ", " 11 " represent to distribute to user terminal; Can also realize through other mode; Like the numbering of in DL grant, carrying uplink control channel resource, title etc., implementation is varied, and those skilled in the art are to be understood that.
Based on the identical design of said method, the embodiment of the invention also provides a kind of base station and a kind of user terminal, and the structural representation of base station and user terminal is respectively like Fig. 9, Figure 10.
Referring to Fig. 9, be the structural representation of base station in the embodiment of the invention, this base station comprises:
Transmit-Receive Unit 82 is connected with resource configuration unit 81, is used for transmitting PDCCH at said at least one descending sub frame; And, be used on the uplink control channel resource that resource configuration unit 81 is confirmed, receiving the uplink control signal that user terminal feeds back.
Preferably, above-mentioned Transmit-Receive Unit 82 is further used on PDCCH transmission descending scheduling indication DLgrant, and said DL grant carries the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
Preferably, resource configuration unit 81 is further used for, and is configured to said appointment uplink control channel resource set configuration first kind uplink control channel resource through high-level signaling; And it is DFT-S-OFDM, PUCCH format 1b with channel selection or PUCCH format 1a/1b that said resource configuration unit disposes the corresponding control channel transformat of said first kind uplink control channel resource.
Preferably, resource configuration unit 81 is further used for, and is second type of uplink control channel resource of said appointment uplink control channel resource set configuration according to the sequence number of the CCE of PDCCH; And being used to dispose the corresponding control channel transformat of said second type of uplink control channel resource is PUCCH format1a/1b or PUCCH format 1b with channel selection.
Referring to Figure 10, be the structural representation of a kind of user terminal in the embodiment of the invention, this terminal comprises:
Transmit-Receive Unit 91; At least one descending sub frame that is used for issuing in the base station receives PDCCH; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; And, be used for confirming the uplink control channel resource feeding back uplink control signal of unit selection in resource;
Resource is confirmed unit 92, is connected with Transmit-Receive Unit 91, is used for choosing the ascending control channel money that is used for the feeding back uplink control signal at the indicated uplink control channel resource of said at least one descending sub frame.
Preferably, above-mentioned Transmit-Receive Unit 91 is further used for, and on PDCCH, receives descending scheduling indication DL grant, and said DL grant carries the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
Preferably, Transmit-Receive Unit 91 is the feeding back uplink control signal in the uplink control channel resource that resource is confirmed to choose unit 92, has particular application as:
Transmit uplink control signal on the first kind uplink control channel resource that adopts control channel transformat DFT-S-OFDM, PUCCH format 1b with channelselection or PUCCH format 1a/1b to confirm to confirm the unit in resource, said first kind uplink control channel resource is confirmed through the high-level signaling configuration by the base station.
Preferably; Transmit-Receive Unit 91 is further used for; Adopt control channel transformat PUCCH format1a/1b or PUCCH format 1b with channel selection on second type of uplink control channel resource, to transmit uplink control signal, said second type of uplink control channel resource confirmed according to the sequence number of the control channel Elements C CE of PDCCH by the base station.
Preferably, resource confirms that unit 92 chooses the ascending control channel money that is used for the feeding back uplink control signal, and have particular application as: confirm uplink control channel resource for a plurality of sub-frame of uplink, definite uplink control channel resource is corresponding to same sub-frame of uplink; If the uplink control channel resource of confirming comprises a first kind uplink control channel resource at least, Transmit-Receive Unit 91 uses up-to-date uplink control channel resource transmitting uplink control information in the first kind uplink control channel resource of confirming.
In the embodiment of the invention, a plurality of control channel resources that are used for the feeding back uplink control signal are distributed through the semi-static user terminal that is of high-level signaling in the base station, and a plurality of control channel resource notifications that will distribute are to user terminal; When transfer of data, the control channel resource that be used for feeding back uplink control signal specified for this descending sub frame to each the dispatching downlink subframe in the packet that sends to user terminal in the base station from a plurality of control channel resources of distributing to this user terminal; User terminal is receiving the packet that the base station issues, and determines corresponding uplink control signal; User terminal is chosen the control corresponding channel resource to the base station feedback uplink control signal from the control channel resource of base station appointment.Adopt technical scheme of the present invention; User terminal is determined the uplink control signal that needs feedback after the packet that receives is deciphered; And adopt the control channel resource feeding back uplink control signal of base station appointment to get final product; Need in each up-link carrier, not reserve the control channel resource that is used for the feeding back uplink control signal for its corresponding descending carrier, therefore, technical scheme of the present invention has made full use of uplink control channel resource, has improved system transmissions efficient.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. definite method of control channel resource transmission and resource is characterized in that, comprising:
The base station is at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Downlink physical control channel PDCCH is transmitted in the base station in said at least one descending sub frame;
The base station receives the uplink control signal of said UE feedback on the uplink control channel resource that distributes.
2. the method for claim 1 is characterized in that, the base station is that said user terminal distributes after the uplink control channel resource, also comprises:
Descending scheduling indication DL grant is transmitted in the base station on PDCCH, said DL grant carries the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
3. the method for claim 1 is characterized in that, said appointment uplink control channel resource set includes the first kind uplink control channel resource of high-level signaling configuration;
The ascending control channel transformat that said first kind uplink control channel resource is corresponding comprises: DFT-S-OFDM, PUCCH format 1b with channel selection or PUCCH format1a/1b.
4. method as claimed in claim 3 is characterized in that, said appointment uplink control channel resource set also comprises second type of uplink control channel resource according to the sequence number configuration of the control channel Elements C CE of PDCCH;
The corresponding ascending control channel transformat of said second type of uplink control channel resource is PUCCHformat 1a/1b or PUCCH format 1b with channel selection.
5. definite method of control channel transmission and resource is characterized in that, comprising:
User terminal UE receives physical downlink control channel PDCCH at least one descending sub frame that the base station issues; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Said UE chooses the uplink control channel resource that is used for the feeding back uplink control signal in the indicated uplink control channel resource of said at least one descending sub frame;
Said UE is the feeding back uplink control signal in the uplink control channel resource of choosing.
6. method as claimed in claim 5 is characterized in that, said UE also comprised before choosing uplink control channel resource:
On PDCCH, receive the descending scheduling indication DL grant that the base station issues, said DL grant carries the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
7. method as claimed in claim 5 is characterized in that, said appointment uplink control channel resource set comprises the first kind uplink control channel resource by the high-level signaling configuration;
The ascending control channel transformat that said first kind uplink control channel resource is corresponding is DFT-S-OFDM, PUCCH format 1b with channel selection or PUCCH format1a/1b.
8. method as claimed in claim 7 is characterized in that, said appointment uplink control channel resource set also comprises second type of uplink control channel resource confirming according to the control channel Elements C CE sequence number of PDCCH;
The corresponding ascending control channel transformat of said second type of uplink control channel resource is PUCCHformat 1a/1b or PUCCH format 1b with channel selection.
9. method as claimed in claim 7 is characterized in that, further comprises:
Said UE is that a plurality of sub-frame of uplink are confirmed uplink control channel resource, and definite uplink control channel resource is corresponding to same sub-frame of uplink; If said definite uplink control channel resource comprises a first kind uplink control channel resource at least, said UE uses up-to-date uplink control channel resource transmitting uplink control information in said definite first kind uplink control channel resource.
10. a base station is characterized in that, comprising:
Resource configuration unit; Be used at least one descending sub frame; The uplink control channel resource that the indication base station is distributed for user terminal in the uplink control channel resource set in this descending sub frame; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource;
Transmit-Receive Unit is used at said at least one descending sub frame transmission downlink physical control channel PDCCH; And, be used on the uplink control channel resource that distributes, receiving the uplink control signal that said UE feeds back.
11. base station as claimed in claim 10; It is characterized in that; Said Transmit-Receive Unit is further used for, and transmission descending scheduling indication DL grant on PDCCH, said DL grant carry the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
12. base station as claimed in claim 10 is characterized in that, said resource configuration unit is further used for, and is configured to said appointment uplink control channel resource set configuration first kind uplink control channel resource through high-level signaling; And it is DFT-S-OFDM, PUCCH format 1b with channel selection or PUCCH format 1a/1b that said resource configuration unit disposes the corresponding control channel transformat of said first kind uplink control channel resource.
13. base station as claimed in claim 12 is characterized in that, said resource configuration unit is further used for, and is second type of uplink control channel resource of said appointment uplink control channel resource set configuration according to the sequence number of the control channel Elements C CE of PDCCH; And it is PUCCH format 1a/1b or PUCCH format 1b with channel selection that said resource configuration unit disposes the corresponding control channel transformat of said second type of uplink control channel resource.
14. a user terminal is characterized in that, comprising:
Transmit-Receive Unit; At least one descending sub frame that is used for issuing in the base station receives physical downlink control channel PDCCH; Indication has the uplink control channel resource that the base station is distributed for UE in this descending sub frame in the uplink control channel resource set; Said appointment uplink control channel resource set comprises at least two types of up channel control resources, every type of corresponding a kind of ascending control channel transformat of uplink control channel resource; And, be used for confirming the uplink control channel resource feeding back uplink control signal of unit selection in resource;
Resource is confirmed the unit, is used for choosing the ascending control channel money that is used for the feeding back uplink control signal at the indicated uplink control channel resource of said at least one descending sub frame.
15. user terminal as claimed in claim 14; It is characterized in that; Said Transmit-Receive Unit is further used for; On PDCCH, receive descending scheduling indication DL grant, said DL grant carries the specified bytes of the uplink control channel resource that is used for the feeding back uplink control signal that is used to indicate distribution.
16. user terminal as claimed in claim 15 is characterized in that, said Transmit-Receive Unit is confirmed feeding back uplink control signal in the uplink control channel resource of unit selection in resource, has particular application as:
Transmit uplink control signal on the first kind uplink control channel resource that adopts control channel transformat DFT-S-OFDM, PUCCH format 1b with channelselection or PUCCH format 1a/1b to confirm to confirm the unit in resource, said first kind uplink control channel resource is confirmed through the high-level signaling configuration by the base station.
17. user terminal as claimed in claim 16; It is characterized in that; Said Transmit-Receive Unit is further used for; Adopt control channel transformat PUCCH format 1a/1b or PUCCH format 1b withchannel selection on second type of uplink control channel resource, to transmit uplink control signal, said second type of uplink control channel resource confirmed according to the sequence number of the control channel Elements C CE of PDCCH by the base station.
18. user terminal as claimed in claim 16; It is characterized in that; Said resource confirms that unit selection is used for the ascending control channel money of feeding back uplink control signal; Have particular application as: confirm uplink control channel resource for a plurality of sub-frame of uplink, definite uplink control channel resource is corresponding to same sub-frame of uplink;
If the uplink control channel resource of confirming comprises a first kind uplink control channel resource at least, said Transmit-Receive Unit uses up-to-date uplink control channel resource transmitting uplink control information in the first kind uplink control channel resource of confirming.
Priority Applications (2)
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| CN2010102561943A CN102378373A (en) | 2010-08-17 | 2010-08-17 | Control channel transmission and resource determination method, base station and terminal |
| PCT/CN2011/078344 WO2012022239A1 (en) | 2010-08-17 | 2011-08-12 | Method, base station, and user equipment for control channel transmission and resources confirmation |
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| CN2010102561943A CN102378373A (en) | 2010-08-17 | 2010-08-17 | Control channel transmission and resource determination method, base station and terminal |
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