CN103281165A - Method and apparatus for transmitting/receiving Acknowledgement (ACK)/Negative ack (NACK) information in communication system - Google Patents

Method and apparatus for transmitting/receiving Acknowledgement (ACK)/Negative ack (NACK) information in communication system Download PDF

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CN103281165A
CN103281165A CN2013100647483A CN201310064748A CN103281165A CN 103281165 A CN103281165 A CN 103281165A CN 2013100647483 A CN2013100647483 A CN 2013100647483A CN 201310064748 A CN201310064748 A CN 201310064748A CN 103281165 A CN103281165 A CN 103281165A
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ack
nack
cce
resource
index
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CN103281165B (en
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金泳范
赵俊暎
阿里斯·帕帕萨克拉里奥
权桓准
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Samsung Electronics Co Ltd
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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
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses a method and an apparatus for transmitting/receiving Acknowledgement (ACK)/Negative ACK (NACK) information in a communication system, wherein a method for receiving the ACK/NACK information from a base station comprises transmitting data and control information to at least one user equipment; examining resources used for receiving the ACK/NACK, wherein the ACK/NACK is mapped to at least on CCE(Control Channel Element) based on a mapping rule between the CCEs and the resources for receiving the ACK/NACK, and the resources for receiving the ACK/NACK are indentified through a cyclic shift index, an orthogonal sequence index and a resource block index; and receiving the ACK/NACK information of the transmitted information using the examined resources, the mapping rule being with an indexing sequence corresponding to the CCEs increases, the cyclic shift index increases till being used up and is then reset; the orthogonal sequence index increases every time the cyclic shift index is used up till being used up and then is reset; and the resource block index increases every time the orthogonal sequence index is used up till being used up.

Description

The method and apparatus of sending/receiving ack/nack information in the communication system
The application be that on 06 16th, 2008, application number are 200880020321.0 the applying date, denomination of invention divides an application for the application for a patent for invention of " being used for distributing and obtaining the method and apparatus of ack/nack resources in the mobile communication system ".
Technical field
The present invention relates generally to mobile communication system, particularly, relate to for the method and apparatus that effectively uses the resource that is used for the control information transmission.
Background technology
In communication system for example in LTE (Long Term Evolution) system, confirm (ACK)/negate ACK (NACK) feedback information, as a class uplink control information, be to mix the applied down link transmission of automatic repeat requests (HARQ) data success/failure signal for being illustrated in to receive.
In the LTE system, send the existence of data/do not exist the to classify transmission form for uplink control information according to up link.When on up link, sending data and control information simultaneously, LTE system Time Division Multiplexing multiplex data and control information, and before sending, data and control information are mapped to the time-frequency resources that sends distribution into data.Yet when not having data to send when only sending control information, the LTE system uses to control information and sends the special frequency band that distributes.Current, in standards meetings, just physical uplink control channel (PUCCH) is defined as for the physical channel that only sends control information, and PUCCH is mapped to the special frequency band that distributes.
Fig. 1 is shown in the 3GPP LTE system at the schematic diagram of up link for the transmission structure of the physical channel PUCCH of control information transmission.In Fig. 1, transverse axis represents time domain, and the longitudinal axis represents frequency domain.More specifically, Fig. 1 illustrates time domain and the frequency domain in system transmission bandwidth 110 in a subframe 102.
With reference to figure 1, be 1ms as subframe 102 length of the basic transmitting element of up link, and a subframe comprise two time slots 104 and 106, each length is 0.5ms.Time slot 104 and 106 comprises a plurality of SC-FDMA code element 111-123 (131-143) separately.Fig. 1 illustrates the example that a time slot comprises 7 SC-FDMA code elements.
In time-frequency domain, the elementary cell of resource is resource element (RE).Can pass through SC-FDMA symbol index (for down link, the OFDM symbol index) and sub-carrier indices and define RE.The elementary cell that resource is distributed is Resource Block (RB), for example RB108 and 109.RB108 and 109 comprises a plurality of subcarriers and a plurality of SC-FDMA code element.In the example shown in Figure 1,12 subcarriers and 14 SC-FDMA code elements of constituting 2 time slots constitute a RB.
With reference to figure 1, the frequency band that PUCCH is mapped to is with expression RB, corresponding with the corresponding reference marker 108 in one or both ends or the reference marker 109 of system transmission bandwidth 110.PUCCH can use frequency hopping a sub-image duration increases frequency diversity, and in this case, can be by the frequency hopping of time slot.A plurality of RB for the PUCCH transmission can be distributed in base station (or Node B), to agree the transmission from a plurality of users' control information.
With reference to figure 1, after the control information #1 that the preallocated frequency band 108 in first time slot 104 sends had experienced frequency hopping, the preallocated frequency band 109 of another in second time slot 106 was sent out.Yet after the control information #2 that the preallocated frequency band 109 in first time slot 104 sends had experienced frequency hopping, the preallocated frequency band 108 of another in second time slot 106 was sent out.
In Fig. 1 in the illustrated embodiment, in subframe 102, by reference marker 111,112,116,117,138,139,143 and 144 or reference marker 131,132,136,137,118,119,123 and 124 the representative the SC-FDMA code elements in send control information, and by reference marker 113,114,115,140,141 and 142 or reference marker 133,134,135,120,121 and 122 the representative the SC-FDMA code elements in send pilot tone (perhaps reference signal (RS)).The pilot tone that comprises predetermined sequence is used to the channel estimating at the correlation demodulation at receiving terminal place.Be used for the SC-FDMA code element that control information sends number, to be used for the number of the SC-FDMA code element that RS sends and they all be that mode by example provides in the position of subframe at this, and these will change according to the type that sends control information and/or system's operation of expectation.
Usually, code division multiplexing (CDM) is multiplexed into identical RB for the ACK/NACK that will send at the PUCCH at different user.As mentioned above, a plurality of RB for the PUCCH transmission can be distributed in the base station, to agree the transmission from a plurality of users' ACK/NACK.
With Zadoff-Chu (ZC) sequence as the sequence of the CDM that is used for control information just under discussion.Because the Zadoff-Chu sequence has constant signal level (or constant envelope) in time domain and frequency domain, so it has good peak-to-average power ratio (Peak-to-Average Power Ratio, PAPR) characteristic and shown outstanding channel estimating performance in frequency domain.
Usually, the length of supposing to be used for the Zadoff-Chu sequence of PUCCH is 12 samplings, and its number equals to be included in the subcarrier number among the RB.In this case, because the maximum possible number of the different cyclic shift value of Zadoff-Chu sequence is 12, so be possible by distributing different cyclic shift value that maximum 12 PUCCH are multiplexed into a RB to PUCCH.
Fig. 2 illustrates the different cyclic shift value that send among the ACK/NACK at the PUCCH with said structure, use the Zadoff-Chu sequence each user's ACK/NACK is multiplexed into example among the identical RB.In Fig. 2, the longitudinal axis represents the cyclic shift value 200 of Zadoff-Chu sequence.Be considered as the TU of wireless channel model (Typical Urban, typical urban) in the model, channel maximum possible number that do not have orthogonality to lose (abrupt loss) suddenly is 6 because can experience multiplexing in a RB, so Fig. 2 illustrates 6 ack/nack signals 202, the multiplexing situation of 204,206,208,210 and 212 experience.Fig. 2 illustrates the example that uses identical RB and identical Zadoff-Chu sequence to send ACK/NACK as follows: the ACK/NACK202 that uses cyclic shift " 0 " 214 to send from UE#1; The ACK/NACK204 that uses cyclic shift " 2 " 218 to send from UE#2; The ACK/NACK206 that uses cyclic shift " 4 " 222 to send from UE#3; The ACK/NACK208 that uses cyclic shift " 6 " 226 to send from UE#4; The ACK/NACK210 that uses cyclic shift " 8 " 230 to send from UE#5; And the ACK/NACK212 that uses cyclic shift " 10 " 234 to send from UE#6.
Except the CDM control information based on the Zadoff-Chu sequence sends, can be by using the multiplexing capacity that the time domain orthogonal sequence improves the PUCCH that carries control information extraly.
The exemplary of orthogonal sequence comprises the Walsh sequence.Be the orthogonal sequence of M for length, have M sequence that satisfies the orthogonality between them.More specifically, for 1 bit control information, ACK/NACK for example can improve its multiplexing capacity by the time domain orthogonal sequence being applied to the SC-FDMA code element that ACK/NACK is mapped to before sending.Can be restricted to a time slot or shorter by the time interval that will use the time domain orthogonal sequence therein, the loss of orthogonality that is caused by the wireless channel change is minimized.For example, in a time slot be that 4 orthogonal sequence is applied to 4 and is used for the SC-FDMA code elements that ACK/NACK sends with length, and in a time slot be that 3 orthogonal sequence is applied to 3 and is used for the SC-FDMA code elements that RS sends with length.Basically, for ACK/NACK and RS, can carry out User Recognition by the cyclic shift value of using the Zadoff-Chu sequence, and by orthogonal sequence, can obtain extra User Recognition.For the correlation reception of ACK/NACK, because need be based on the RS that is mapped to ACK/NACK one to one, so limited the multiplexing capacity of ack/nack signal by the RS that is mapped to ACK/NACK.
Fig. 3 illustrates and is being used for PUCCH structure that ACK/NACK sends, is using the time domain orthogonal sequence that each user's ACK/NACK is multiplexed into example among the identical RB except the different cyclic shift value of Zadoff-Chu sequence.In Fig. 3, the longitudinal axis represents the cyclic shift value 300 of Zadoff-Chu sequence, and transverse axis represents time domain orthogonal sequence 302.In being considered as the TU of wireless channel model (typical urban) model, can carry out the multiplexing of them in a RB and not have the maximum number of the used cyclic shift value of orthogonality loss suddenly is 6, if and additionally to use 3 length be 4 orthogonal sequence 364,366 and 368, then at most can a multiplexing 6*3=18 ack/nack signal 304,306,308,310,312,314,316,318,320,322,324,326,328,330,332,334,336 and 338.
Fig. 3 illustrates and uses as follows for the identical RB of ACK/NACK transmission and the example of identical Zadoff-Chu sequence: the ACK/NACK304 that uses cyclic shift " 0 " 340 and orthogonal sequence " 0 " 364 to send from UE#1; The ACK/NACK306 that uses cyclic shift " 0 " 340 and orthogonal sequence " 1 " 366 to send from UE#2; The ACK/NACK308 that uses cyclic shift " 0 " 340 and orthogonal sequence " 2 " 368 to send from UE#3; Until; The ACK/NACK334 that uses cyclic shift " 10 " 360 and orthogonal sequence " 0 " 364 to send from UE#16; The ACK/NACK336 that uses cyclic shift " 10 " 360 and orthogonal sequence " 1 " 366 to send from UE#17; And the ACK/NACK338 that uses cyclic shift " 10 " 360 and orthogonal sequence " 2 " 368 to send from UE#18.Length is orthogonal sequence 364,366 and 368 orthogonalities that satisfy between them of 4 orthogonal code.
Send at PUCCH that resource needed information comprises among the ACK/NACK: (i) expression sends the RB information of ACK/NACK by which RB, the (ii) circular shift information of Zadoff-Chu sequence, and (iii) orthogonal sequence information.
The invention provides a kind of control channel that is sent by the base station by definition and be used for the method that detailed mapping relations between the resource that ACK/NACK sends are effectively used resource and improved receptivity, make base station and UE can identify the resource information for UE ACK/NACK transmission jointly.
The elementary cell that constitutes downlink control channel is control channel element (CCE).A downlink control channel comprises one or more CCE, and each CCE comprises a plurality of RE.The increase of the CCE number of downlink control channel can reduce the channel coding rate be used to the control information that is mapped to downlink control channel, makes to obtain chnnel coding again.
Fig. 4 illustrates the example that generates downlink control channel.More specifically, Fig. 4 illustrates following example: for N altogether CCEIndividual CCE401-409 uses CCE#0 401-CCE#3 404 these 4 CCE to generate the downlink control channel 430 of UE#1; Use these 2 CCE of CCE#4 405-CCE#5406 to generate the downlink control channel 422 of UE#2; Use CCE#6 407 these 1 CCE to generate the downlink control channel 416 of UE#3; Use CCE#7 408 these 1 CCE to generate the downlink control channel 417 of UE#4; And use CCE#N CCE-1 409 these 1 CCE generate the downlink control channel 418 of UE#5.That is to say that the base station sends the down link control information of UE#1-UE#5 in any subframe.When a plurality of CCE were included in the downlink control channel, CCE can be continuous as shown in Figure 4, perhaps can disperse, and is also namely discrete.System's operation is depended in the position of CCE.
UE can use N altogether CCECarry out decoding on the downlink control channel that individual CCE generates, and when detecting the identifier (ID) of himself, identifying corresponding channel is the down control channel that sends to UE self.
Summary of the invention
Design the present invention with problem and/or shortcoming above solving at least, and the beneficial effect that describes below is provided at least.Therefore, one aspect of the present invention provides the distribution of ACK/NACK resource and acquisition methods and device, be used for making the mobile communication system in the support packet data service of using HARQ, send the needed expense of resource information that is used for the ACK/NACK transmission to UE with signal and minimize.
Another aspect of the present invention provides the distribution of ACK/NACK resource and acquisition methods and device, is used for optimizing ACK/NACK and sends resource needed quantity and improve the ACK/NACK receptivity.
According to aspects of the present invention, provide a kind of for divide the method that is used in uplink acknowledgment (ACK)/resource that negative ACK (NACK) sends in mobile communication system, this ACK/NACK is used for being illustrated in success/failure that the down link that receives the base station sends data.This resource allocation methods comprises: the mapping ruler between the resource of determining to constitute the control channel element of downlink control channel and be used for the ACK/NACK transmission; Send for obtaining the control information of determined mapping ruler with the resource that is used for the ACK/NACK transmission of using mapping ruler to distribute at least one subscriber equipment (UE); Send down-link data channel by predetermined scheduling operation; And downlink control channel sent to UE.
According to a further aspect in the invention, provide a kind of for obtaining in mobile communication system for the method for confirming (ACK)/resource that negative ACK (NACK) sends, this ACK/NACK sends data success/failure signal for being illustrated in by subscriber equipment (UE) receiving downlink.This resource acquiring method comprises: receive the control information that comprises the control channel element that constitutes downlink control channel and the mapping ruler between the resource that is used for the ACK/NACK transmission from the base station; And when the receiving downlink control channel, the use mapping ruler obtains the resource that ACK/NACK sends that is used for that is assigned to UE.
According to a further aspect in the invention, provide a kind of for divide the device that is used in uplink acknowledgment (ACK)/resource that negative ACK (NACK) sends in mobile communication system, this ACK/NACK is used for being illustrated in success/failure that the down link that receives the base station sends data.This resource allocation device comprises: ACK/NACK sends resource allocation unit, be used for to determine constitute the control channel element of downlink control channel and be used for mapping ruler between the resource that ACK/NACK sends, and send the control information that is used for the resource that ACK/NACK sends that is used for obtaining determined mapping ruler and uses that mapping ruler distributes at least one subscriber equipment (UE); And the downlink control channel generation unit, be used for sending down-link data channel by predetermined scheduling operation, and downlink control channel is sent to UE.
According to a further aspect in the invention, provide a kind of for obtaining in mobile communication system for the device of confirming (ACK)/resource that negative ACK (NACK) sends, this ACK/NACK sends data success/failure signal for being illustrated in by subscriber equipment (UE) receiving downlink.This resource acquisition device comprises: ACK/NACK resource allocation control channel decoder, be used for comprising from the base station reception control information of the control channel element that constitutes downlink control channel and the mapping ruler between the resource that is used for the ACK/NACK transmission, and the control information of decoding and receiving; The downlink control channel decoder is used for receiving the decode downlink control channel; And the ACK/NACK controller, be used for use mapping ruler and downlink control channel and obtain the resource that ACK/NACK sends that is used for that is assigned to UE.
Description of drawings
When from the embodiment below in conjunction with accompanying drawing, above-mentioned and other aspects, feature and advantage of the present invention will become more obvious, wherein:
Fig. 1 is the schematic diagram that is shown in the transmission structure of the PUCCH that is used for the ACK/NACK transmission in the LTE system;
Fig. 2 is that diagram uses the cyclic shift value of Zadoff-Chu sequence to distribute the schematic diagram of ACK/NACK examples of resources;
Fig. 3 is that diagram uses the cyclic shift value of Zadoff-Chu sequence and orthogonal sequence to distribute the schematic diagram of ACK/NACK examples of resources;
Fig. 4 is the schematic diagram that the diagram control channel comprises the example of CCE;
Figure SA is diagram according to the control channel of the embodiment of the invention 1 and is used for the schematic diagram of mapping relations between the resource that ACK/NACK sends;
Fig. 5 B is diagram according to the control channel of the embodiment of the invention 1 and is used for the schematic diagram of another mapping relations between the resource that ACK/NACK sends;
Fig. 6 is that diagram is according to the schematic diagram of the operating process of the base station of the embodiment of the invention;
Fig. 7 is that diagram is according to the schematic diagram of the operating process of the UE of the embodiment of the invention;
Fig. 8 A is diagram according to the control channel of the embodiment of the invention 2 and is used for the schematic diagram of mapping relations between the resource that ACK/NACK sends;
Fig. 8 B is diagram according to the control channel of the embodiment of the invention 2 and is used for the schematic diagram of another mapping relations between the resource that ACK/NACK sends;
Fig. 9 A is diagram according to the control channel of the embodiment of the invention 3 and is used for the schematic diagram of mapping relations between the resource that ACK/NACK sends;
Fig. 9 B is diagram according to the control channel of the embodiment of the invention 3 and is used for the schematic diagram of another mapping relations between the resource that ACK/NACK sends;
Figure 10 A is diagram according to the control channel of embodiment of the invention 3a and is used for the schematic diagram of mapping relations between the resource that ACK/NACK sends;
Figure 10 B is diagram according to the control channel of embodiment of the invention 3a and is used for the schematic diagram of another mapping relations between the resource that ACK/NACK sends;
Figure 11 is that diagram is according to the schematic diagram of the operating process of the base station of the embodiment of the invention 4;
Figure 12 illustrates the block diagram of base station apparatus according to the preferred embodiment of the invention; And
Figure 13 is the block diagram that illustrates the UE device that is used for transmission ACK/NACK according to the preferred embodiment of the invention.
Embodiment
Describe the preferred embodiments of the present invention in detail referring now to accompanying drawing.In the following description, for clarity and brevity, the known function that omission is herein incorporated and the detailed description of configuration.Define term as used herein based on the function among the present invention, and can change according to user, operator's intention or common practice.Therefore, should carry out the definition of term based on the content of whole specification.
The invention provides a kind of for the improvement that realizes the effective utilization of resources and receptivity, make with signal and send the minimized method of the needed expense of resource information that the control information that is used for UE sends simultaneously.
Further, the invention provides the definition for the operation of following situation: will use for the RB of ACK/NACK transmission, the cyclic shift value that is used for the Zadoff-Chu sequence and orthogonal sequence and act on the resource that ACK/NACK sends, and provide a kind of for the method for distributing and managing the resource that is used for the ACK/NACK transmission.
Embodiment 1
Embodiments of the invention 1 provide following method: provide by downlink control channel in the base station under the situation of the information relevant with being used for resource that UE ACK/NACK sends, by the cyclic shift value of preferential fixing conduct for one type Zadoff-Chu sequence of the resource of UE ACK/NACK transmission, and when the CCE of downlink control channel indexed sequential increases, change the index of orthogonal sequence, CCE is mapped to the resource that sends for ACK/NACK.
Fig. 5 A and Fig. 5 B illustrate downlink control channel and are used for mapping relations between the resource that UE ACK/NACK sends.
Being used for the resource that ACK/NACK sends comprises: RB information RB (o) (o=0 wherein, 1 ..., N RB-1), it is frequency domain resource information; Circular shift information CS (n) (n=0 wherein, 1 ..., N CS-1), expression is with what samplings of Zadoff-Chu sequence cyclic shift; And orthogonal sequence information OS (m) (m=0 wherein, 1 ... N OS-1).Suppose in system, to have distributed: send the N altogether that distributes for ACK/NACK RBThe N altogether of individual RB, Zadoff-Chu sequence CSIndividual cyclic shift value and N altogether OSIndividual orthogonal sequence.
Fig. 5 A and Fig. 5 B illustrate following method: by preferentially be fixed for the RB information index o of ACK/NACK transmission and the index n of the circular shift information of the cyclic shift value of representing the Zadoff-Chu sequence in the resource that is used for UE ACK/NACK transmission, and when the CCE of downlink control channel index k increases in proper order, increase orthogonal sequence information index m in proper order, CCE is mapped to one to one the resource that sends for ACK/NACK.Particularly, if the index that the order of orthogonal sequence increases has all been used up, then this method increases by 1 with cyclic shift index n, returns the index that increases orthogonal sequence from beginning in proper order then.If cyclic shift index n has also used up, then after the operation on repeat, this method will increase by 1 for the RB information index o that ACK/NACK sends, and then repeat top operation.
Be used for N altogether CCEIndividual CCE can be summarized as follows with the rule that this mode is mapped to the resource that sends for ACK/NACK one to one.Suppose only ACK/NACK to be mapped to into ACK/NACK sends the RB that distributes default following formula (1).That is to say, do not consider other control informations such as the relevant control information of CQI (CQI) or MIMO feedback and ACK/NACK are multiplexed into situation among the identical RB.
CCE(k)→OS(m)，CS(n)，RB(o)，
k＝0，1，...，N CCE-1
m＝k mod N OS(m＝0，1，...，N OS-1)
n＝floor(k/N OS)mod N CS(n＝0，1，...，N CS-1)
o＝floor(k/(N OS*N CS))(o＝0，1，...，N RB-1) (1)
In the superincumbent formula (1), the remainder that " x mod y " expression is obtained divided by y by x, and floor (z) is the maximum integer that is not more than z.
In order to simplify description, if hypothesis N in Fig. 5 A and Fig. 5 B RB=1, N CS=6 and N OS=3, then CCE (k) is mapped to one to one resource OS (m), the CS (n) and the RB (o) that send for ACK/NACK, as follows.
CCE(0)→OS(0)，CS(0)，RB(0)，
CCE(1)→OS(1)，CS(0)，RB(0)，
CCE(2)→OS(2)，CS(0)，RB(0)，
CCE(3)→OS(0)，CS(1)，RB(0)，
CCE(4)→OS(1)，CS(1)，RB(0)，
CCE(5)→OS(2)，CS(1)，RB(0)，
CCE(6)→OS(0)，CS(2)，RB(0)，
CCE(7)→OS(1)，CS(2)，RB(0)，
When a plurality of CCE constituted downlink control channel, CCE can be continuous, perhaps can disperse, and was also namely discontinuous, and this depends on system's operation.Fig. 5 A illustrates the previous case, and Fig. 5 B illustrates latter event.
Fig. 5 A illustrates following example: CCE (0), CCE (1), CCE (2) and CCE (3) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (4) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#2; And CCE (6) and CCE (7) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
Because only needing to respond the data channel that sent by the base station and downlink control channel, UE sends an ACK/NACK, so UE select to be mapped to the downlink control channel that constitutes each UE a plurality of CCE be used for of resource that UE ACK/NACK sends, and carry out the ACK/NACK transmission with selected resource.Under the agreement of before having reached between base station and the UE, can be used for the method for the resource of UE ACK/NACK transmission by base station and the common identification selection of UE.As possible example, exist a kind ofly to be set to the method that UE is actually used in the resource that ACK/NACK sends for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the downlink control channel that constitutes UE.Therefore, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 5 A; UE#2 uses ACK/NACK resource OS (1), the CS (1) and the RB (0) that are mapped to CCE (4) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (0), the CS (2) and the RB (0) that are mapped to CCE (6) to send ACK/NACK.
Use aforesaid method, if possible, system minimizes the number by the multiplexing ack/nack signal of the orthogonal sequence that is used for a cyclic shift, thereby helps to reduce the interference between the ack/nack signal of a plurality of UE.Wireless channel in the UE experience changes under the tangible situation, and such as in the environment of fast moving, this operation reduces because the mis-behave of the caused ack/nack signal of loss of orthogonality of orthogonal sequence.
Fig. 5 B illustrates following example: CCE (0), CCE (3), CCE (6) and CCE (7) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (1) and CCE (4) constitute the downlink control channel that comprises for the scheduling control information of UE#2; And CCE (2) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
Exist and a kind ofly be set to the method that UE is actually used in the resource that ACK/NACK sends for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the down control channel that constitutes UE.In this case, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 5 B; UE#2 uses ACK/NACK resource OS (1), the CS (0) and the RB (0) that are mapped to CCE (1) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (2), the CS (0) and the RB (0) that are mapped to CCE (2) to send ACK/NACK.
In Fig. 5 B in the illustrated embodiment, because only CS (0) is with the cyclic shift resource that acts on ACK/NACK, so remaining cyclic shift resource CS (1), CS (2), CS (3), CS (4) and CS (5) can be distributed other control informations that send such as CQI information.If in system, distributed a plurality of RB that send for ACK/NACK, then because only RB (0) is used among Fig. 5 B in the illustrated embodiment, so can be assigned as and send other control informations or data being assigned as the RB that sends all the other ACK/NACK.
Fig. 6 illustrates the base station information relevant with the resource that is used for the ACK/NACK transmission is offered UE to carry out the process of aforementioned operation.
With reference to figure 6, in step 601, the base station arranges the CCE that constitutes downlink control channel and the mapping relations one to one between the resource that is used for UE ACK/NACK transmission, UE is set obtains the method for the resource that sends for ACK/NACK by it, and provide corresponding information to UE.The resource that is used for the UEACK/NACK transmission comprises: as the RB information of frequency domain resource information, and the circular shift information of Zadoff-Chu sequence and orthogonal sequence information.Can be under the agreement that base station and UE had before reached, by base station and UE, perhaps by signaling to UE from the base station, identify jointly and be used for mapping relations one to one and the resource acquiring method that ACK/NACK sends.
In step 602, the base station determines whether to send down-link data channel by predetermined scheduling operation, and when the base station was determined to send down-link data channel, it was identified for the resource of down-link data channel transmission and sends form.
In step 603, the base station sends down link data information according to determined resource and the transmission form that sends for down-link data channel in the step 602.Further, the base station sends and comprises the resource that sends for down-link data channel and the downlink control channel that sends form.Under the agreement that UE had before reached or according to the information that sends with signal from the base station in the step 601, obtain the resource that sends for UE ACK/NACK from the downlink control channel that receives between itself and base station.
Fig. 7 illustrates UE and obtains the resource that sends for ACK/NACK from the base station and use the resource of obtaining to send ACK/NACK to carry out the process of aforementioned operation.
With reference to figure 7, in step 700, UE identification constitutes the CCE of downlink control channel and is used for mapping relations one to one between the resource that ACK/NACK sends, and under the agreement of before having reached between base station and the UE or based on the information that sends with signal from the base station, be used for the resource acquiring method that ACK/NACK sends.The resource that is used for the ACK/NACK transmission comprises: as the RB information of frequency domain resource information, and the circular shift information of Zadoff-Chu sequence and orthogonal sequence information.
In step 701, UE receives the data channel of using HARQ and the downlink control channel that is associated thereof from the base station.Downlink control channel comprises that the base station sends the downlink scheduling control information of form at resource information and the expression of the data channel of particular UE transmission, and comprises one or more CCE.
In step 702, UE according to identify in the step 700, CCE and be used for the mapping relations one to one between the resource that ACK/NACK sends and be used for the resource acquiring method that ACK/NACK sends, obtain the resource that sends for ACK/NACK from the downlink control channel that receives.
In step 703, UE decodes to the data channel that receives, and determines exist/not have mistake, and generate ACK under the situation that does not have mistake, and generate NACK under the situation that has mistake.Generate ack/nack signal, repeatedly improve receptivity and enlarge the residential quarter covering so that repeat it.
In step 704, UE is mapped to the resource of obtaining that ACK/NACK sends that is used for the ACK/NACK that generates in step 702, and sends ACK/NACK.
Embodiment 2
Embodiment 2 provides following method: provide by downlink control channel in the base station under the situation of the information relevant with being used for resource that UE ACK/NACK sends, by the index of preferential fixing conduct for one type orthogonal sequence of the resource of UE ACK/NACK transmission, and along with the CCE indexed sequential of downlink control channel increases and the cyclic shift value of change Zadoff-Chu sequence, CCE is mapped to the resource that sends for ACK/NACK.
Fig. 8 A and Fig. 8 B illustrate downlink control channel and are used for mapping relations between the resource that UE ACK/NACK sends.Being used for the resource that ACK/NACK sends comprises: RB information RB (o) (o=0 wherein, 1 ..., N RB-1), it is frequency domain resource information; Circular shift information CS (n) (n=0 wherein, 1 ..., N CS-1), expression is with what samplings of Zadoff-Chu sequence cyclic shift; And orthogonal sequence information OS (m) (m=0 wherein, 1 ... N OS-1).Suppose in system, to have distributed: send the N altogether that distributes for ACK/NACK RBThe N altogether of individual RB, Zadoff-Chu sequence CSIndividual cyclic shift value and N altogether OSIndividual orthogonal sequence.
Fig. 8 A and Fig. 8 B illustrate following method: by preferentially being fixed for RB information index o and the orthogonal sequence information index m that ACK/NACK sends in the resource that is used for UE ACK/NACK transmission, and along with the CCE index k of downlink control channel increases and order increases the index n of circular shift information in proper order, this index n represents the cyclic shift value of Zadoff-Chu sequence, CCE is mapped to one to one the resource that sends for ACK/NACK.Particularly, if the index that the order of circular shift information increases has all been used up, then this method increases by 1 with orthogonal sequence information index m, returns the index that increases circular shift information from beginning in proper order then.If orthogonal sequence information index m has also all used up, then after the operation on repeat, this method will increase by 1 for the RB information index o that ACK/NACK sends, and then repeat top operation.
Be used for N altogether CCEIndividual CCE can be summarized as follows with the rule that this mode is mapped to the resource that sends for ACK/NACK one to one.Only ACK/NACK is being mapped to ACK/NACK sends under the hypothesis of the RB that distributes default following formula (2).That is to say, do not consider other control informations such as the relevant control information of CQI or MIMO feedback and ACK/NACK are multiplexed into situation among the identical RB.
CCE(k)→OS(m)，CS(n)，RB(o)，
k＝0，1，...，N CCE-1
m＝floor(k/N CS)mod N OS(m＝0，1，...，N OS-1)
n＝k mod N CS(n＝0，1，...，N CS-1)
o＝floor(k/(N OS*N CS))(o＝0，1，...，N RB-1) (2)
In the superincumbent formula (2), the remainder that " x mod y " expression obtains divided by y with x, and floor (z) is the maximum integer that is not more than z.
In order to simplify description, if hypothesis N in Fig. 8 A and Fig. 8 B RB=1, N CS=6 and N OS=3, then CCE (k) is mapped to one to one resource OS (m), the CS (n) and the RB (o) that send for ACK/NACK, as follows.
CCE(0)→OS(0)，CS(0)，RB(0)，
CCE(1)→OS(0)，CS(1)，RB(0)，
CCE(2)→OS(0)，CS(2)，RB(0)，
CCE(3)→OS(0)，CS(3)，RB(0)，
CCE(4)→OS(0)，CS(4)，RB(0)，
CCE(5)→OS(0)，CS(5)，RB(0)，
CCE(6)→OS(1)，CS(0)，RB(0)，
CCE(7)→OS(1)，CS(1)，RB(0)，
When being included in a plurality of CCE in the downlink control channel, CCE can be continuous, perhaps can disperse, and is also namely discontinuous, and this depends on system's operation.Fig. 8 A illustrates the previous case, and Fig. 8 B illustrates latter event.Specifically, embodiment 2 is suitable for following situation: locate at any time, altogether N CCEAmong the individual CCE only a part constitute the downlink control channel of each UE.For example, Fig. 8 A and Fig. 8 B illustrate N altogether CCE8 CCE among the individual CCE constitute the downlink control channel of each UE.
Fig. 8 A illustrates following example: CCE (0), CCE (1), CCE (2) and CCE (3) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (4) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#2; And CCE (6) and CCE (7) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
Because UE only need send an ACK/NACK in response to the data channel that is sent by the base station and downlink control channel, so UE selects one for the resource of UE ACK/NACK transmission, these resources are mapped to a plurality of CCE of the downlink control channel that is configured for each UE, and carry out the ACK/NACK transmission with selected resource.Can under the agreement of before having reached between base station and the UE, be used for the method for the resource of UE ACK/NACK transmission by base station and the common identification selection of UE.For a possible example, there is a kind of like this method: be used for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the downlink control channel that constitutes UE and be set to the resource that UE is actually used in the ACK/NACK transmission.Therefore, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 8 A; UE#2 uses ACK/NACK resource OS (0), the CS (4) and the RB (0) that are mapped to CCE (4) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (1), the CS (0) and the RB (0) that are mapped to CCE (6) to send ACK/NACK.
Fig. 8 B illustrates following example: CCE (0), CCE (3), CCE (6) and CCE (7) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (1) and CCE (4) constitute the downlink control channel that comprises for the scheduling control information of UE#2; And CCE (2) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
There is a kind of like this method: be used for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the down control channel that constitutes UE and be set to UE and be actually used in the resource that ACK/NACK sends.In this case, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 8 B; UE#2 uses ACK/NACK resource OS (0), the CS (1) and the RB (0) that are mapped to CCE (1) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (0), the CS (2) and the RB (0) that are mapped to CCE (2) to send ACK/NACK.
In addition, except the operation based on the formula (2) of embodiment 2, formula (3) that can also be below using provides for N altogether CCEIndividual CCE is mapped to the definition of the rule of the resource that sends for ACK/NACK one to one.Following formula (3) is based on only ACK/NACK being mapped to the hypothesis that sends the RB that distributes into ACK/NACK.That is to say, do not consider other control informations such as the relevant control information of CQI or MIMO feedback and ACK/NACK are multiplexed into situation among the identical RB.Provided N below in addition CSTDefinition.
CCE(k)→OS(m)，CS(n)，RB(o)，
k＝0，1，...，N CCE-1
N CST＝CEIL(Ncce/N OS)
m＝floor(k/Ncst)mod N OS(m＝0，1，...，N OS-1)
n＝k mod N CS(n＝0，1，...，N CS-1)
o＝floor((k mod N OS)/N CS) (3)
In the superincumbent formula (3), CEIL (x) is the smallest positive integral that is not less than x.
For example, if hypothesis N RB=2, N CS=6, N OS=3, N CST=8 and N CCE=24, then CCE (k) is mapped to one to one resource OS (m), the CS (n) and the RB (o) that send for ACK/NACK, as follows.
CCE(0)→OS(0)，CS(0)，RB(0)，
CCE(1)→OS(0)，CS(1)，RB(0)，
CCE(2)→OS(0)，CS(2)，RB(0)，
CCE(3)→OS(0)，CS(3)，RB(0)，
CCE(4)→OS(0)，CS(4)，RB(0)，
CCE(5)→OS(0)，CS(5)，RB(0)，
CCE(6)→OS(0)，CS(0)，RB(1)，
CCE(7)→OS(0)，CS(1)，RB(1)，
CCE(8)→OS(1)，CS(0)，RB(0)
CCE(9)→OS(1)，CS(1)，RB(0)
In the above example, if be mapped to the resource N that ACK/NACK sends that is used for of CCE CS=6 preallocated cyclic shift resources have all been used up until CCE (5) for CCE (0), and then CCE (6) for example being mapped to ACK/NACK sends the 2nd RB that distributes is cyclic shift CS (0) and the orthogonal sequence OS (0) of RB (1).For until CCE (7), finished it to N CST=8 or still less be used for the resource mapping that ACK/NACK sends, and turn back to CCE (8), it is mapped to cyclic shift CS (0) and the orthogonal sequence OS (1) that not have use in RB (0).By this method, ACK/NACK is mapped to CCE, to prevent because the deterioration of the ACK/NACK receptivity that the loss of orthogonality of orthogonal sequence causes.
Embodiment 3
Embodiment 3 provides following method: provide by downlink control channel in the base station under the situation of the information relevant with being used for resource that UE ACK/NACK sends, by increasing the mode that changes in the cyclic shift value of the index that is used for the resource orthogonal sequence that UE ACK/NACK sends and Zadoff-Chu sequence along with the CCE indexed sequential of downlink control channel, CCE is mapped to resource for the ACK/NACK transmission.
Fig. 9 A and Fig. 9 B illustrate downlink control channel and are used for mapping relations between the resource that UE ACK/NACK sends.Being used for the resource that ACK/NACK sends comprises: RB information RB (o) (o=0 wherein, 1 ..., N RB-1), it is frequency domain resource information; Circular shift information CS (n) (n=0 wherein, 1 ..., N CS-1), expression is with what samplings of Zadoff-Chu sequence cyclic shift; And orthogonal sequence information OS (m) (m=0 wherein, 1 ... N OS-1).Suppose in system, to have distributed: send the N altogether that distributes for ACK/NACK RRThe N altogether of individual RB, Zadoff-Chu sequence CSIndividual cyclic shift value and N altogether OSIndividual orthogonal sequence.
Fig. 9 A and Fig. 9 B illustrate following method: by preferentially being fixed for the RB information index o that ACK/NACK sends in the resource that is used for UE ACK/NACK transmission, and along with the CCE index k of downlink control channel increases and order increases the index n of circular shift information of the cyclic shift value of orthogonal sequence information index m and expression Zadoff-Chu sequence in proper order, CCE is mapped to one to one the resource that sends for ACK/NACK.In order to keep mapping relations one to one, index m or index n can be mixed with mapping ruler between the CCE.If the index n of the circular shift information of a cyclic shift value that is used for the acceptable orthogonal sequence information index of RB m that ACK/NACK sends and expression Zadoff-Chu sequence has all used up, then this method will increase by 1 for the RB information index o that ACK/NACK sends, and then repeat operation.
Can express in this way N altogether with following formula (4) CCEIndividual CCE is mapped to the rule of the resource that sends for ACK/NACK one to one.
CCE(k)→OS(m)，CS(n)，RB(o)，
k＝0，1，...，N CCE-1
m＝k mod N OS(m＝0，1，...，N OS-1)
n＝k+floor(k/N CS)mod N CS(n＝0，1，...，N CS-1)
o＝floor(k/(N OS*N CS))(o＝0，1，...，N RB-1) (4)
In the superincumbent formula (4), the remainder that " x mod y " expression obtains divided by y with x, and floor (z) is the maximum integer that is not more than z.
In order to simplify description, if hypothesis N in Fig. 9 A and Fig. 9 B RB=1, N CS=6 and N OS=3, then CCE (k) is mapped to one to one resource OS (m), the CS (n) and the RB (o) that send for ACK/NACK, as follows.
CCE(0)→OS(0)，CS(0)，RB(0)，
CCE(1)→OS(1)，CS(1)，RB(0)，
CCE(2)→OS(2)，CS(2)，RB(0)，
CCE(3)→OS(0)，CS(3)，RB(0)，
CCE(4)→OS(1)，CS(4)，RB(0)，
CCE(5)→OS(2)，CS(5)，RB(0)，
CCE(6)→OS(0)，CS(1)，RB(0)，
CCE(7)→OS(1)，CS(2)，RB(0)，
When a plurality of CCE constituted downlink control channel, CCE can be continuous, perhaps can disperse, and was also namely discontinuous, and this depends on system's operation.Fig. 9 A illustrates the previous case, and Fig. 9 B illustrates latter event.
Fig. 9 A illustrates following example: CCE (0), CCE (1), CCE (2) and CCE (3) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (4) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#2; And CCE (6) and CCE (7) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
Because UE only need send an ACK/NACK in response to the data channel that is sent by the base station and downlink control channel, so UE selects one for the resource of UE ACK/NACK transmission, these resources are mapped to a plurality of CCE of the downlink control channel that constitutes each UE, and carry out the ACK/NACK transmission with selected resource.Under the agreement of before having reached between base station and the UE, can be used for the method for the resource of UE ACK/NACK transmission by base station and the common identification selection of UE.For a possible example, there is a kind of like this method: be used for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the downlink control channel that constitutes UE and be set to the resource that UE is actually used in the ACK/NACK transmission.Therefore, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 9 A; UE#2 uses ACK/NACK resource OS (1), the CS (4) and the RB (0) that are mapped to CCE (4) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (0), the CS (1) and the RB (0) that are mapped to CCE (6) to send ACK/NACK.
Fig. 9 B illustrates following example: CCE (0), CCE (3), CCE (6) and CCE (7) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (1) and CCE (4) constitute UE#2 comprise for the downlink control channel of scheduling control information; And CCE (2) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#3.
There is a kind of such method: be used for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the down control channel that constitutes UE and be set to UE and be actually used in the resource that ACK/NACK sends.In this case, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Fig. 9 B; UE#2 uses ACK/NACK resource OS (1), the CS (1) and the RB (0) that are mapped to CCE (1) to send ACK/NACK; And UE#3 uses ACK/NACK resource OS (2), the CS (2) and the RB (0) that are mapped to CCE (2) to send ACK/NACK.
Embodiment 3a
Embodiment 3a provides following method: provide by downlink control channel in the base station under the situation of the information relevant with being used for resource that UE ACK/NACK sends, change in the index of the orthogonal sequence that is used for the resource that UE ACK/NACK sends and the cyclic shift value of Zadoff-Chu sequence according to preassigned pattern by increasing along with the CCE indexed sequential of downlink control channel, CCE is mapped to the resource that sends for ACK/NACK.Embodiment 3a is specially adapted to when the expansion of the maximum delay of wireless propagation path is very big.
Figure 10 A and Figure 10 B illustrate downlink control channel and are used for mapping relations between the resource that UE ACK/NACK sends.Being used for the resource that ACK/NACK sends comprises: RB information RB (o) (o=0 wherein, 1 ..., N RB-1), it is frequency domain resource information; Circular shift information CS (n) (n=0 wherein, 1 ..., N CS-1), expression is with what samplings of Zadoff-Chu sequence cyclic shift; And orthogonal sequence information OS (m) (m=0 wherein, 1 ... N OS-1).Suppose in system, to have distributed the N altogether that sends distribution for ACK/NACK RBIndividual RB has distributed the N altogether of Zadoff-Chu sequence at a RB who is used for the ACK/NACK transmission CSIndividual cyclic shift value, and distributed N altogether being used for the RB that ACK/NACK sends OSIndividual orthogonal sequence.
Figure 10 A and Figure 10 B illustrate following method: by preferentially being fixed for the RB information index o that ACK/NACK sends in the resource that is used for UE ACK/NACK transmission, and along with the CCE index k of downlink control channel increases in proper order and increase the index n of the circular shift information of Zadoff-Chu sequence in proper order after extra fixedly orthogonal sequence information index m, CCE is mapped to resource for the ACK/NACK transmission one to one.In this case, this method changes the circular shift information of the Zadoff-Chu sequence of being represented by index n according to orthogonal sequence information index m, and the number of the orthogonal sequence that is mapped to given cyclic shift value is minimized, thereby make the minimum interference between the orthogonal sequence.Table 1 shows at a RB who is used for the ACK/NACK transmission for the circular shift information of the Zadoff-Chu sequence of ACK/NACK transmission and the example of orthogonal sequence information.
Table 1
Figure BSA00000859820300181
Figure BSA00000859820300191
In the environment of the maximum delay expansion with very big wireless propagation path, the cyclic shift value of the mapping scheme of table 1 by the Zadoff-Chu sequence that allow to be used for ACK/NACK and to send has 3 longer sampling intervals and prevents the deterioration of orthogonality, and eliminates interference between the orthogonal sequence by the given cyclic shift value that orthogonal sequence is mapped to one to one the Zadoff-Chu sequence.In table 1, the resource of the circular shift information by being defined as the Zadoff-Chu sequence and the combination of orthogonal sequence information sends ACK/NACK#1-ACK/NACK#11, and maximum 12 ack/nack signals can with ACK/NACK#1, ACK/NACK2 ..., the order of ACK/NACK#11 is multiplexed among the RB according to the order of sequence.
If fixed be used for RB information index o and orthogonal sequence information index m that ACK/NACK sends after, the index of the circular shift information of Zadoff-Chu sequence all used up, then this programme increases by 1 with orthogonal sequence information index m, returns the index that increases the circular shift information of the cyclic shift value of representing the Zadoff-Chu sequence from beginning in proper order then.If after the operation on repeat, orthogonal sequence information index m also used up, then this method will be used for the RB information index o increase by 1 of ACK/NACK transmission, and then repeat operation.Usually, the base station is distributed on semi-quiescent basis and managed the RB that sends for ACK/NACK, and has following possibility situation: locate at any time, the RB that is used for the ACK/NACK transmission that distributes is a part of ACK/NACK of being used for transmission only.In this case, the base station those branches can be used in the ACK/NACK transmission but the RB that the actual ACK/NACK of being not used in sends is scheduling to the resource for another purpose, for example, is scheduling to the resource that sends for the UE data.
Can will incite somebody to action N altogether in this mode CCEThe regular expression that individual CCE is mapped to the resource that sends for ACK/NACK one to one is as follows.Only ACK/NACK is being mapped to ACK/NACK sends under the hypothesis of the RB that distributes default following formula (5).That is to say, in order to simplify description, do not consider other control informations such as the relevant control information of CQI or MIMO feedback and ACK/NACK are multiplexed into situation among the identical RB.
CCE(k)→OS(m)，CS(m，n)，RB(o)，
k＝0，1，...，N CCE-1
m＝floor(k/ N CS)mod N OS(m＝0，1，...，N OS-1)
n＝k mod N CS(n＝0，1，...，N CS-1)
o＝floor(k/(N OS*N CS))(o＝0，1，...，N RB-1) (5)
In the superincumbent formula (5), the remainder that " x mod y " expression obtains divided by y with x, and floor (z) is the maximum integer that is not more than z.
In order to simplify description, if hypothesis N in Figure 10 A and Figure 10 B RB=1, N CS=4 and N OS=3, then CCE (k) is mapped to one to one resource OS (m), the CS (n) and the RB (o) that send for ACK/NACK, as follows.
CCE(0)→OS(0)，CS(0，0)，RB(0)，
CCE(1)→OS(0)，CS(0，1)，RB(0)，
CCE(2)→OS(0)，CS(0，2)，RB(0)，
CCE(3)→OS(0)，CS(0，3)，RB(0)，
CCE(4)→OS(1)，CS(1，0)，RB(0)，
CCE(5)→OS(1)，CS(1，1)，RB(0)，
CCE(6)→OS(1)，CS(1，2)，RB(0)，
CCE(7)→OS(1)，CS(1，3)，RB(0)，
CCE(8)→OS(2)，CS(2，0)，RB(0)，
CCE(9)→OS(2)，CS(2，1)，RB(0)，
CCE(10)→OS(2)，CS(2，2)，RB(0)，
CCE(11)→OS(2)，CS(2，3)，RB(0)，……
When a plurality of CCE constituted downlink control channel, CCE can be continuous, perhaps can disperse, and was also namely discontinuous, and this depends on system's operation.Figure 10 A illustrates the previous case, and Figure 10 B illustrates latter event.
Figure 10 A illustrates following example: CCE (0), CCE (1), CCE (2) and CCE (3) and constitutes the downlink control channel that comprises for the scheduling control information of UE#1; CCE (4) and CCE (5) constitute the downlink control channel that comprises for the scheduling control information of UE#2; CCE (6) and CCE (7) constitute the downlink control channel that comprises for the scheduling control information of UE#3; CCE (8) and CCE (9) constitute the downlink control channel that comprises for the scheduling control information of UE#4; And CCE (10) and CCE (11) constitute the downlink control channel that comprises for the scheduling control information of UE#5.
Because UE only need send an ACK/NACK in response to the data channel that is sent by the base station and downlink control channel, so UE selects one for the resource of UE ACK/NACK transmission, these resources are mapped to a plurality of CCE of the downlink control channel that constitutes each UE, and carry out the ACK/NACK transmission with selected resource.Under the agreement of before having reached between base station and the UE, can be used for the method for the resource of UE ACK/NACK transmission by base station and the common identification selection of UE.For a possible example, exist a kind ofly to be set to the method that UE is actually used in the resource that ACK/NACK sends for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the downlink control channel that constitutes UE.Therefore, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0,0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Figure 10 A; UE#2 uses ACK/NACK resource OS (1), the CS (1,0) and the RB (0) that are mapped to CCE (4) to send ACK/NACK; UE#3 uses ACK/NACK resource OS (1), the CS (1,2) and the RB (0) that are mapped to CCE (6) to send ACK/NACK; UE#4 uses ACK/NACK resource OS (2), the CS (2,0) and the RB (0) that are mapped to CCE (8) to send ACK/NACK; And UE#5 uses ACK/NACK resource OS (2), the CS (2,2) and the RB (0) that are mapped to CCE (10) to send ACK/NACK.
Figure 10 B illustrates following example: wherein, CCE (0), CCE (5), CCE (10) and CCE (11) constitute the downlink control channel that comprises for the scheduling control information of UE#1; CCE (1) and CCE (6) constitute the downlink control channel that comprises for the scheduling control information of UE#2; CCE (2) and CCE (7) constitute the downlink control channel that comprises for the scheduling control information of UE#3; CCE (3) and CCE (8) constitute the downlink control channel that comprises for the scheduling control information of UE#4; And CCE (4) and CCE (9) constitute the downlink control channel that comprises for the scheduling control information of UE#5.
Exist and a kind ofly be set to the method that UE is actually used in the resource that ACK/NACK sends for being mapped to the ACK/NACK resource that has a CCE of minimum index at the CCE of the down control channel that constitutes UE.In this case, in the illustrated embodiment, UE#1 uses ACK/NACK resource OS (0), the CS (0,0) and the RB (0) that are mapped to CCE (0) to send ACK/NACK in Figure 10 B; UE#2 uses ACK/NACK resource OS (0), the CS (0,1) and the RB (0) that are mapped to CCE (1) to send ACK/NACK; UE#3 uses ACK/NACK resource OS (0), the CS (0,2) and the RB (0) that are mapped to CCE (2) to send ACK/NACK; UE#4 uses ACK/NACK resource OS (0), the CS (0,3) and the RB (0) that are mapped to CCE (3) to send ACK/NACK; And UE#5 uses ACK/NACK resource OS (1), the CS (1,0) and the RB (0) that are mapped to CCE (4) to send ACK/NACK.
Embodiment 4
Embodiment 4 provides following operation: optionally be applied to the distribution of the resource that sends for UE ACK/NACK and relevant signaling information thereof with one among embodiment 1, embodiment 2 and the embodiment 3.
The control information of base station below UE sends is so that effectively management is used for the resource that UE ACK/NACK sends.
(1) first control information
First control information is represented downlink control channel and is used for mapping ruler between the resource that UE ACK/NACK sends.Particularly, in the mapping ruler of the mapping ruler of mapping ruler, embodiment 3 of mapping ruler, the embodiment 2 of embodiment 1 and embodiment 3a one is represented in first control information.If not, the number of the mapping ruler of plan using by restriction system, in any 2 mapping rulers in 4 mapping rulers is represented in first control information.For example, in the mapping ruler of the mapping ruler of embodiment 1 and embodiment 2 one is represented in first control information.In this case, need 1 bit for the first control information signaling.
(2) second control informations
The cyclic shift value of Zadoff-Chu sequence is represented in second control information.Cyclic shift value representation number of samples serves as at interval with the Zadoff-Chu sequence cyclic shift with it.Because maximum delay expansion is different according to channel circumstance, so the base station arranges the cyclic shift value adaptively according to channel circumstance, make orthogonality between the Zadoff-Chu sequence that can guarantee cyclic shift.
(3) the 3rd control informations
The number of ack/nack signal is represented in the 3rd control information, and these ack/nack signals are mapped to each RB for the PUCCH that distributes in place, system transmission bandwidth two ends.Because ACK/NACK can be represented in addition that the CQI information feedback information relevant with MIMO of channel status is mapped to PUCCH, so the 3rd control information represents to be mapped to the number for the ack/nack signal of the RB of PUCCH.
(4) the 4th control informations
The 4th control information is illustrated in the position for the RB of the PUCCH that distributes at system transmission bandwidth two ends places, initial RB that ack/nack signal is mapped to.Because the quantity according to the relevant feedback information of the CQI information that just is mapped in this and/or MIMO, the position of the RB that is mapped at the RB ack/nack signal that is used for PUCCH may be different, so the position of the initial RB that ack/nack signal is mapped to is represented in the 4th control information.The signal that is mapped to the RB that is positioned at the system transmission bandwidth two ends often suffers by from the caused mis-behave of the interference of other system.Usually, aspect needed reception reliability, ack/nack signal is than CQI and/or the relevant feedback information height of MIMO.Therefore, when using the relevant feedback information of the multiplexing ACK/NACK of a plurality of RB, CQI information and/or MIMO, operate for efficient system, preferably, CQI information and/or the relevant feedback information of MIMO are mapped to for the RB that locates the PUCCH of distribution at the system transmission bandwidth two ends, and ACK/NACK is mapped to for the mapping completed RB of feedback information PUCCH, that CQI information and/or MIMO are relevant to it, perhaps ACK/NACK is mapped to for the RB after these RB of PUCCH.Use such operation protection ACK/NACK and avoid interference from the adjacent system band, and when sending the RB that is used for PUCCH that distributes for ACK/NACK and be not used in ACK/NACK and send, these untapped RB are used for data send.
(5) the 5th control informations
The cyclic shift value of Zadoff-Chu sequence is represented in the 5th control information, and at the RB of the PUCCH that is used for distributing at place, system transmission bandwidth two ends, this Zadoff-Chu sequence is used for the RB that ACK/NACK is mapped to.Based on the multiplexing ACK/NACK that not only is applied to of the cyclic shift of Zadoff-Chu sequence, also be applied to the relevant feedback information of CQI information and/or MIMO.Therefore, in that ACK/NACK is being multiplexed among the identical RB with the feedback information that CQI information and/or MIMO are correlated with, must notify the cyclic shift value of the Zadoff-Chu sequence that is used for the ACK/NACK transmission.When handling the cyclic shift value of the Zadoff-Chu sequence that is used for the ACK/NACK transmission continuously with the interval of cyclic shift value, minimum value or the initial value for the cyclic shift value of the Zadoff-Chu sequence of ACK/NACK transmission represented in the 5th control information.
Can perhaps pass through independently control channel or top signaling by the broadcast channel (BCH) that is sent by the base station, provide above-mentioned control information to UE.
Figure 11 illustrates the base station provides the information relevant with being used for resource that ACK/NACK sends to carry out the process of aforesaid operations to UE.
With reference to Figure 11, in step 1100, a kind of in base station selecting method 1 and the method 2 obtains the CCE that constitutes downlink control channel by it and is used for the mapping relations one to one between the resource that UE ACK/NACK sends and obtains the method for the resource that sends for ACK/NACK as UE.In order to simplify description, the method for method 1 expression embodiment 1, the method for method 2 expression embodiment 2.Receptivity and the ACK/NACK resources effective of consideration ACK/NACK are selected.In other cases, method 1 and method 2 can be any two kinds of methods in the method for embodiment 1, embodiment 2, embodiment 3 and embodiment 3a.For example, method 1 and method 2 can be the methods of embodiment 1 and embodiment 3, or the method for embodiment 2 and embodiment 3.
If selected method 1, then the base station arranges such method: UE according to method 1 and obtains the CCE that constitutes downlink control channel by this method and be used for the mapping relations one to one between the resource that UE ACK/NACK sends and obtain the resource that sends for ACK/NACK in step 1101, and the base station provides corresponding information to UE then.Further, the base station is sent to UE by signal the control information that comprises first control information, second control information, the 3rd control information, the 4th control information and the 5th control information is provided.The resource that is used for UE ACK/NACK transmission comprises: as the RB information of frequency domain resource information, circular shift information and the orthogonal sequence information of Zadoff-Chu sequence.
Yet, if selected method 2, then the base station arranges such method: UE according to method 2 and obtains the CCE that constitutes downlink control channel by this method and be used for the mapping relations one to one between the resource that UEACK/NACK sends and obtain the resource that sends for ACK/NACK in step 1102, and the base station provides corresponding information to UE then.Further, the base station is sent to UE by signal the control information that comprises first control information, second control information, the 3rd control information, the 4th control information and the 5th control information is provided.The resource that is used for UE ACK/NACK transmission comprises: as the RB information of frequency domain resource information, circular shift information and the orthogonal sequence information of Zadoff-Chu sequence.
In step 1103, the base station determines whether to send down-link data channel by predetermined scheduling operation.When the base station was determined to send down-link data channel, it was identified for resource and the transmission form thereof that down-link data channel sends.
In step 1104, the resource that is used for the down-link data channel transmission and transmission form that the base station basis is determined in step 1103 send down-link data channel.In addition, the base station sends and comprises the resource that sends for down-link data channel and the downlink control channel that sends form.Then, UE obtains the resource that sends for UE ACK/NACK according to the information that sends with signal from the base station from the downlink control channel that receives in step 1101 or 1102.
Obtain the resource that sends for ACK/NACK from the base station and use the resource of obtaining to send the process of ACK/NACK for UE, can be with reference to figure 7.
Figure 12 illustrates the block diagram of base station apparatus according to the preferred embodiment of the invention.In order to simplify description, will generate the description of equipment at this omitted data channel.
With reference to Figure 12, the base station apparatus that is proposed by the present invention comprises: ACK/NACK resource allocation unit 1210 is used for generating the control information that is used for pre-allocation resource and sending to UE; And downlink control channel generation unit 1220, be used for the downlink control channel that generates and send data channel and be associated.
Particularly, ACK/NACK resource allocation unit 1210 comprises: controller 1200, ACK/NACK resource are distributed control information maker 1210 and ACK/NACK resource allocation control channel maker 1202, and downlink control channel generation unit 1220 comprises: data channel dispatcher 1203, down link control information maker 1204 and downlink control channel maker 1205.
Base station controller 1200 determines that such method: UE obtain the CCE that constitutes downlink control channel by this method and are used for the mapping relations one to one between the resource that UE ACK/NACK sends and obtain the resource that sends for ACK/NACK, and distributes control information maker 1201 that relevant information is provided to the ACK/NACK resource.
The control information of the input information that the ACK/NACK resource distributes control information maker 1201 to generate to comprise coming self-controller 1200 and above-mentioned first control information, second control information, the 3rd control information, the 4th control information and the 5th control information, and provide the control information that generates to ACK/NACK resource allocation control channel maker 1202.ACK/NACK resource allocation control channel maker 1202 generates signal by input signal is carried out predetermined chnnel coding and modulated process, and the signal that generates is sent to UE.The ACK/NACK resource allocation control channel can be independently physical layer control channel or broadcast channel.
The transmitting time of ACK/NACK resource allocation control channel is regulated by base station controller 1200, and is illustrated as switch 1206 in Figure 12.After sending the ACK/NACK resource allocation control channel, data channel dispatcher 1203 is the operation dispatching operation on the data channel that it will send to UE.Down link control information maker 1204 generates down link control information by the information of obtaining such as the transmission form of the resource that sends data channel thereon and/or data channel from data channel dispatcher 1203.Downlink control channel maker 1205 generates signal by carrying out predetermined chnnel coding and modulated process at the down link control information that generates, and the signal that generates is sent to UE.Determined the transmitting time of downlink control channel by the operation of the switch 1206 of base station controller 1200 control.
Figure 13 is the block diagram that illustrates the UE device that is used for transmission ACK/NACK according to the preferred embodiment of the invention.In order to simplify description, will be in the description of this omitted data channel receiving equipment.
UE extracts the ACK/NACK resource allocation control channel that is sent by the base station from the signal 1300 that receives, thereby carry out decode operation thereon to obtain control information by ACK/NACK resource allocation control channel decoder 1302, this control information comprises that UE obtains the method for the CCE that constitutes downlink control channel and the mapping relations one to one between the resource that is used for UE ACK/NACK transmission by it.Further, UE obtains the resource that sends for ACK/NACK, and comprise the first above-mentioned control information, second control information, the 3rd control information, the 4th control information and the 5th control information, and provide the control information of obtaining to ACK/NACK controller 1304.ACK/NACK controller 1304 extracts the ACK/NACK resource allocation control channel that is sent by the base station based on predetermined time of reception and resource information by control switch 1301.
After obtaining the control information relevant from the ACK/NACK of ACK/NACK resource allocation control channel, UE receiving downlink control channel also uses downlink control channel decoder 1303 to carry out decode operation thereon.ACK/NACK controller 1304 determines that from the decoded result on the downlink control channel which CCE constitutes downlink control channel, and uses the information of obtaining from ACK/NACK resource allocation control channel decoder 1302 to be identified for the resource that ACK/NACK sends.ACK/NACK maker 1305 determines exist/not exist mistake in the data that receive, according to the judgement that exist/does not have mistake is generated ACK/NACK, the ACK/NACK that generates is mapped to determined resource for the ACK/NACK transmission, and the result is sent to the base station.
As tangible from the foregoing descript, the operation that application is proposed by the present invention makes and minimizes to the needed expense of resource allocation information that UE is used for the ACK/NACK transmission with the signal transmission, and optimized ACK/NACK transmission resource needed quantity in the mobile communication system of the support packet data service of using HARQ, thereby improve the ACK/NACK receptivity.
Although illustrate and described the present invention with reference to its some preferred embodiment, but those skilled in the art should be understood that, under the condition that does not break away from the spirit and scope of the present invention that are defined by the following claims, can carry out various changes aspect form and the details at this.

Claims (12)

1. one kind is used in the method for mobile communication system by base station confirmation of receipt (ACK)/negative ACK (NACK) information, and described method comprises:
Send data and control information at least one subscriber equipment (UE), wherein this control information is to send by the downlink control channel that comprises at least one control channel element (CCE);
Check the resource that is used for receiving ACK/NACK, this ACK/NACK is based on being mapped to described at least one CCE at CCE with for the mapping ruler between the resource that receives ACK/NACK, and described resource for reception ACK/NACK is identified by cyclic shift index, orthogonal sequence index and Resource Block index; And
The resource that use checks receives the ACK/NACK information for the transmission data,
Wherein, described mapping ruler is: along with the indexed sequential corresponding to CCE increases, be used for receiving resource circulation displacement index, orthogonal sequence index and the increase of Resource Block index of ACK/NACK, wherein, the increase of cyclic shift index is exhausted up to this cyclic shift index, is reset then; Increase was exhausted up to this orthogonal sequence index when the orthogonal sequence index was exhausted at each cyclic shift index, was reset then; And increase was exhausted up to this Resource Block index when the Resource Block index was exhausted at each orthogonal sequence index.
2. method according to claim 1, wherein, first CCE that described at least one CCE is described downlink control channel.
3. method according to claim 1 also comprises sending the cyclic shift value, and this cyclic shift value indicator sequence is recycled the number in the sampling interval of displacement.
4. one kind is used for sending the method for confirming (ACK)/negative ACK (NACK) information in mobile communication system by subscriber equipment (UE), and described method comprises:
Receive data and control information from the base station, wherein this control information is to receive by the downlink control channel that comprises at least one control channel element (CCE); And
Obtain for the resource that sends ACK/NACK, this ACK/NACK is based on being mapped to described at least one CCE at CCE with for the mapping ruler between the resource that sends ACK/NACK, described resource for transmission ACK/NACK is identified by cyclic shift index, orthogonal sequence index and Resource Block index
The resource that use is obtained sends the ACK/NACK information for received data,
Wherein, described mapping ruler is: along with the indexed sequential corresponding to CCE increases, be used for receiving resource circulation displacement index, orthogonal sequence index and the increase of Resource Block index of ACK/NACK, wherein, the increase of cyclic shift index is exhausted up to this cyclic shift index, is reset then; Increase was exhausted up to this orthogonal sequence index when the orthogonal sequence index was exhausted at each cyclic shift index, was reset then; And increase was exhausted up to this Resource Block index when the Resource Block index was exhausted at each orthogonal sequence index.
5. method according to claim 4, wherein, first CCE that described at least one CCE is described downlink control channel.
6. method according to claim 4 also comprises:
Receive the cyclic shift value, this cyclic shift value indicator sequence is recycled the number in the sampling interval of displacement,
Obtain the number that described sequence is recycled the sampling interval of displacement.
7. one kind is used at the device of mobile communication system in base station confirmation of receipt (ACK)/negative ACK (NACK) information, and described device comprises:
Transmitter is used for sending data and control information at least one subscriber equipment (UE), and wherein this control information is to send by the downlink control channel that comprises at least one control channel element (CCE);
Controller, be used for checking the resource that is used for receiving ACK/NACK, this ACK/NACK is based on being mapped to described at least one CCE at CCE with for the mapping ruler between the resource that receives ACK/NACK, and described resource for reception ACK/NACK is identified by cyclic shift index, orthogonal sequence index and Resource Block index; And
Receiver be used for to use the resource that checks to receive ACK/NACK information for the transmission data,
Wherein, described mapping ruler is: along with the indexed sequential corresponding to CCE increases, be used for receiving resource circulation displacement index, orthogonal sequence index and the increase of Resource Block index of ACK/NACK, wherein, the increase of cyclic shift index is exhausted up to this cyclic shift index, is reset then; Increase was exhausted up to this orthogonal sequence index when the orthogonal sequence index was exhausted at each cyclic shift index, was reset then; And increase was exhausted up to this Resource Block index when the Resource Block index was exhausted at each orthogonal sequence index.
8. device according to claim 7, wherein, first CCE that described at least one CCE is described downlink control channel.
9. device according to claim 7, wherein, described transmitter sends the cyclic shift value, and this cyclic shift value indicator sequence is recycled the number in the sampling interval of displacement.
10. one kind is used for locating to send the device of confirming (ACK)/negative ACK (NACK) information in mobile communication system at subscriber equipment (UE), and described device comprises:
Receiver is used for receiving data and control information from the base station, and wherein this control information is to receive by the downlink control channel that comprises at least one control channel element (CCE);
Controller, be used for obtaining the resource for sending ACK/NACK, this ACK/NACK is based on being mapped to described at least one CCE at CCE with for the mapping ruler between the resource that sends ACK/NACK, and described resource for transmission ACK/NACK is identified by cyclic shift index, orthogonal sequence index and Resource Block index; And
Transmitter be used for to use the resource of obtaining to send ACK/NACK information for received data,
Wherein, described mapping ruler is: along with the indexed sequential corresponding to CCE increases, be used for receiving resource circulation displacement index, orthogonal sequence index and the increase of Resource Block index of ACK/NACK, wherein, the increase of cyclic shift index is exhausted up to this cyclic shift index, is reset then; Increase was exhausted up to this orthogonal sequence index when the orthogonal sequence index was exhausted at each cyclic shift index, was reset then; And increase was exhausted up to this Resource Block index when the Resource Block index was exhausted at each orthogonal sequence index.
11. device according to claim 10, wherein, first CCE that described at least one CCE is described downlink control channel.
12. device according to claim 10, wherein, described receiver receives the cyclic shift value, and this cyclic shift value indicator sequence is recycled the number in the sampling interval of displacement, and described controller obtains the number that described sequence is recycled the sampling interval of displacement.
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