CN101286792A - Device and method for intensifying synchronous HARQ - Google Patents
Device and method for intensifying synchronous HARQ Download PDFInfo
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Abstract
The invention relates to a method for enhancing a synchronous HARQ. By configuring UE to change an uplink sub-frame occupied by the UE according to the specific method of a cell when the UE sends out or retransmits data, the interference averaging between adjacent cells can be enhanced so as to improve the performance of data transmission. A method for controlling the timing relationship between uplink data and uplink control information can reduce the power consumption of the uplink data transmission and the downlink data transmission of the UE by configuring the UE to send out the uplink data and the uplink control information in the same uplink sub-frame, thus prolonging the communication time.
Description
Technical field
The present invention relates to wireless communication system, relate to a kind of equipment and method of the enhancing synchronous HARQ in wireless communication system in particular.
Background technology
Now, 3GPP standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).In the middle of numerous physical layer transmission technology, be the focus of research based on the downlink transfer technology of OFDM (OFDM) with based on the uplink technology that single-carrier frequency division multiple access inserts (SCFDMA).
Wireless communication system can be divided into Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) according to its duplex mode.The FDD duplex mode is meant that the communication on the both direction in the wireless system finishes respectively on two frequencies separated by a distance, thereby communication entity can be finished the operation that receives and send simultaneously.The TDD duplex mode is meant that the communication on the both direction in the wireless system finishes on identical frequency, thus the operation that communication entity can not receive simultaneously and send, and the operation that promptly receives and send separates in time.
According to the discussion result of current LTE, Fig. 1 is a LTE FDD system descending frame structure, and radio frames (radio frame) time span (101-103) is 10ms; Each frame is divided into a plurality of time slots (slot) (104-107), and present hypothesis is that each radio frames comprises 20 time slots, and time slots length is 0.5ms; Each time slot comprises a plurality of OFDM symbols again, and according to present hypothesis, the time span of effective OFDM symbol is about 66.7 μ s in the LTE system.The time span of the CP of OFDM symbol can have two kinds, promptly the time span of short CP is approximately 4.69 μ s or 5.21 μ s, the time span of long CP is approximately 16.67 μ s, long CP time slot is used for many Cell Broadcast CB/multicasts and the very large situation of radius of society, short CP time slot (108) comprises 7 OFDM symbols, and long CP time slot (109) comprises 6 OFDM symbols.According to present discussion result, continuous two time slots constitute subframes (subframe), and Transmission Time Interval (TTI) is 1ms, equal the time span of a subframe.
In the LTE system, there is the frame structure of two kinds of TDD systems, promptly general tdd frame structure (generic TDD frame structure) and alternative tdd frame structure (alternative TDDframe struture is abbreviated as A-TDD).According to the discussion result of current LTE, Fig. 2 is the frame structure of LTEA-TDD system, and radio frames (radio frame) time span (201-203) is 10ms; Each frame is divided into the field (half-frame) (204,205) of two 5ms; Each field comprises 7 time slots (206～212) and three special territories, i.e. descending pilot frequency time slot (DwPTS) (213), protection be (GP) (214) and uplink pilot time slot (UpPTS) (215) at interval.And first time slot (206) and the DwPTS of each field are fixed for downlink transfer, and second time slot (207) of UpPTS and each field is fixed for uplink.With the sampling frequency is that 30.72MHz is an example, and each time slot (206～212) comprises 20736 sampling, and the time is 0.625ms; DwPTS comprises 2572 sampling, and the time is about 83.7ms; GP comprises 1536 sampling, and the time is 50ms; UpPTS comprises 4340 sampling, and the time is about 141.3ms.Identical with the FDD system, the time span of its effective OFDM symbol is about 66.7 μ s, and the time span of the CP of OFDM symbol can have two kinds, and the time span of short CP is approximately 7.29 μ s, and the time span of long CP is approximately 16.67 μ s.Short CP time slot (216) comprises 9 OFDM symbols and a slot time (TI) (218), and long CP time slot (217) comprises 8 OFDM symbols and a TI (219).The time span of noting two kinds of TI (218,219) is unequal.According to present discussion result, each time slot is a subframe.
According among the LTE to mixing the discussion result of automatic repeat requests (HARQ), the LTE uplink is based on the HARQ strategy of synchronous non-self-adapting.Be meant that synchronously base station assigns gives and have regular time between the ascending resource of subscriber equipment at interval, non-self-adapting is meant that the ascending resource of distributing to subscriber equipment is constant, or change according to predefined pattern.
In the discussion of current LTE, the mode of base station assigns resource can be divided into dynamic dispatching and lasting scheduling (Persistent Scheduling).Dynamic dispatching has maximum dispatching flexibility, but corresponding signaling consumption is also bigger.Persistent dispatching flexibility difference still can reduce the expense of control signaling, and it is particularly useful for transmitting some business that periodic packet bit number is fixed and bit number is fewer, for example VoIP business, interactive game and other real time business etc.
Summary of the invention
The purpose of this invention is to provide a kind of equipment and method that in wireless communication system, strengthens synchronous HARQ.
According to an aspect of of the present present invention, a kind of method that strengthens synchronous HARQ comprises the steps:
A) the specific sub-frame of uplink changing pattern in base station configuration sub-district;
B) base station sends logic sub-frame of uplink indication information in the uplink scheduling control channel;
C) subscriber equipment in conjunction with the sub-frame of uplink changing pattern of its Serving cell configuration, obtains the sequence number of the physical uplink subframe of base station assigns according to logic sub-frame of uplink indication information;
D) subscriber equipment sends or retransmits upstream data in distributing to its sub-frame of uplink.
According to another aspect of the present invention, the equipment of transmitting uplink data is handled in a kind of base station, comprises transmission/reception, also comprises:
A) ascending scheduling control signaling maker is used to generate ascending scheduling control signaling (502), wherein comprises the logic indication information of the sub-frame of uplink of indication distribution;
B) physical channel multiplexer module is used for multiplexing down physical channel;
C) physical channel demodulation multiplexer is used for going out according to logic sub-frame of uplink indication information demultiplexing the uplink data channels of subscriber equipment.
According to another aspect of the present invention, a kind of subscriber equipment is handled the equipment of transmitting uplink data, comprises transmission/reception, also comprises:
A) ascending scheduling control signaling resolver is used to judge whether the base station has sent the control signaling to it, if subscriber equipment obtains base station assigns logic sub-frame of uplink indication information;
B) physical channel demodulation multiplexer module is used for demultiplexing and goes out down physical channel;
C) physical channel multiplexer module is used for according to the multiplexing uplink data channels of logic sub-frame of uplink indication information.
Adopt method of the present invention, the interference that can strengthen between the neighbor cell is average, thereby improves the performance of transfer of data.
According to another aspect of the present invention, a kind of method of controlling the timing relationship of upstream data and ascending control information comprises the steps:
A) resource of the resource of base station assigns downlink data transmission and transmitting uplink data;
B) subscriber equipment sends upstream data and ascending control information in identical sub-frame of uplink.
According to another aspect of the present invention, a kind of subscriber equipment is handled the equipment of uplink, comprises transmission/reception, also comprises:
A) physical channel multiplexer module is used for ACK/NACK information and upstream data are multiplexed into same sub-frame of uplink.
B) physical channel demodulation multiplexer module is used for demultiplexing upstream data and ACK/NACK information;
According to another aspect of the present invention, the equipment of uplink is handled in a kind of base station, comprises transmission/reception, also comprises:
A) physical channel demodulation multiplexer module is used for that demultiplexing goes out ACK/NACK information and upstream data in same subframe.
B) physical channel multiplexer module is used for multiplexing downlink data and ACK/NACK information;
Adopt method of the present invention, can reduce the power consumption of subscriber equipment up-downgoing transmission data, thereby prolong the time of communication.
Description of drawings
Fig. 1 is the downlink frame structure of LTE FDD system;
Fig. 2 is the frame structure of LTE A-TDD system;
Fig. 3 is the schematic diagram that distributes a sub-frame of uplink;
Fig. 4 is the schematic diagram that distributes two sub-frame of uplink;
Fig. 5 is the equipment drawing that transmitting uplink data is handled in the base station;
Fig. 6 is the equipment drawing that subscriber equipment is handled transmitting uplink data;
Fig. 7 is the schematic diagram of uplink in the LTE FDD system;
Fig. 8 is the schematic diagram of uplink in the LTE A-TDD system;
Fig. 9 is the equipment drawing that subscriber equipment is handled uplink;
Figure 10 is the equipment drawing that uplink is handled in the base station.
Embodiment
In the TDD system, what base station or subscriber equipment can only replace sending or receiving.Comprise N in each up-downgoing change-over period of note TDD system
ULIndividual sub-frame of uplink and N
DLIndividual descending sub frame.At the TDD system uplink the new uplink scheduling signaling from the base station can not be arranged in the transmission cycle, promptly the ascending resource distribution instruction must be to send in certain descending sub frame before this up transmission cycle.Equally, subscriber equipment must wait certain descending sub frame of back could receive descending ACK/NACK information after a sub-frame of uplink sends upstream data.
Subscriber equipment specifically is to use N in a up transmission cycle
ULIt is little to the influence of S-HARQ operation which subframe in the individual sub-frame of uplink sends its data.In the S-HARQ of general meaning operation, subscriber equipment all can use N when retransmitting each time
ULThe subframe that in the individual sub-frame of uplink certain is fixing.Like this, suppose to have the subscriber equipment of two uplink, they belong to two adjacent sub-districts respectively, suppose that they have distributed N when a uplink
ULThe subframe of same sequence number in the individual sub-frame of uplink, and the frequency resource that they distribute also is identical, i.e. these two subscriber equipmenies interference signal each other when uplink this time.The transmitting uplink data of supposing them does not all have successfully, then these two subscriber equipmenies all need to retransmit, according to the working mechanism of S-HARQ, they still take identical time and frequency resource when retransmitting, and that is to say that these two subscriber equipmenies still disturb each other.
Average in order to realize the interference between the neighbor cell, to the subscriber equipment that transmits in the sub-frame of uplink that is distributed in same sequence number in the neighbor cell, guarantee it uses different sequence numbers when carrying out the HARQ re-transmission sub-frame of uplink.Be the pattern that a plurality of sub-frame of uplink of system configuration change, and neighbor cell use different changing patterns as far as possible.
A kind of method is to utilize the method definition sub-frame of uplink changing pattern of iteration.Specifically, the sequence number of the sub-frame of uplink that takies when next time transmitting of configure user equipment is passed through formula S
Next=mod (S
Curr+ k, N
UL) calculating, S here
CurrBe the sequence number of the current sub-frame of uplink that takies of uplink of subscriber equipment, N
ULBe the number of sub-frame of uplink in each up transmission cycle, k is the index of changing pattern, k=0, and 1 ... N
UL-1, (A b) is used for the value of each first prime modulus integer b of compute vector A to function m od.According to the method for this iteration, can obtain N
ULIndividual different neighbor cell changing pattern.Note S
NextAnd S
CurrAll be vector, can comprise 1～N
ULIndividual element.Work as S
NextAnd S
CurrWhen only comprising an element, expression base station distributing user equipment in each up transmission cycle transmits on a sub-frame of uplink, can calculate the subframe sequence number that this sub-frame of uplink changes to according to top iterative formula in follow-up uplink so.Work as S
NextAnd S
Curr(n is smaller or equal to N to comprise n
UL) during individual element, expression base station distributing user equipment in each up transmission cycle transmits on n sub-frame of uplink, at this moment needs to calculate the subframe sequence number that each sub-frame of uplink changes to respectively according to above-mentioned iterative formula in follow-up uplink.For example, when a base station assigns n subframe was used to transmit n transmission block to subscriber equipment, the employed sub-frame of uplink of each transmission block obtained the pattern of its variation respectively according to top iterative formula.
Sub-frame of uplink changing pattern among the present invention is not limited to the top define method based on iteration, and system also can adopt the specific sub-frame of uplink changing pattern of other method allocating cell.
When disposing different sub-frame of uplink changing patterns for neighbor cell, the sub-frame of uplink indication information that the base station sends in uplink scheduling control channel (UL grant) is an indication information in logic, is designated as S
LFor example, this logical message can be a bit mapping.This logic indication information indicates the sequence number that the base station is one or more logic subframe of user equipment allocation, and each logical sub frame number is mapped to physics subframe sequence number according to a kind of sub-district specific method.That is, according to this logic indication information, and in conjunction with the sub-frame of uplink changing pattern of its Serving cell configuration, thereby obtain the sequence number that the base station actual allocated is given the physical uplink subframe of subscriber equipment.A kind of method that obtains physical uplink subframe sequence number according to logic subframe indication information is: according to the logic indication information S in the uplink scheduling control channel
LThe sequence number S of each physical uplink subframe that takies when directly obtaining distributing to the first time uplink of subscriber equipment
1, then according to S
1Obtain the sequence number of the sub-frame of uplink that follow-up uplink takies with the iterative formula of introducing above.
In the method for the present invention, disposing a sub-district, to adopt the first method of sub-frame of uplink changing pattern be to send this configuration information by broadcast channel (BCH), especially, can send this configuration information by dynamic BCH (D-BCH) or inferior BCH (S-BCH).Second method is the mapping relations of definition sub-frame of uplink changing pattern and cell ID (Cell ID) or cell group identification (CellGroup ID) etc.Second method is the mapping relations of the orthogonal code of definition sub-frame of uplink changing pattern and primary synchronization channel (P-SCH), auxiliary synchronization channel (S-SCH) and descending public reference signal etc.The base station also can dispose it by D-BCH or S-BCH and whether enable method of the present invention, when the base station is when sending the configuration information of sub-frame of uplink changing pattern by D-BCH or S-BCH, can indicate the current method of the present invention of not carrying out by the code word of reserving a changing pattern.
Fig. 5 is the equipment drawing that transmitting uplink data is handled in the base station, and wherein ascending scheduling control signaling maker (502) and physical channel demodulation multiplexer (505) are embodiments of the present invention.Base station dispatcher is each user equipment allocation sub-frame of uplink resource, and generates ascending scheduling control signaling (502), wherein comprises the logic indication information of the sub-frame of uplink of indication distribution.Ascending scheduling control signaling (502) is launched through emitter (504) after physical channel multiplexer (503) is multiplexing.The base station receives upward signal by receiving system (504), and adopt method of the present invention, according to the operation of the control physical channel demodulation multiplexer of the logic sub-frame of uplink indication information in the ascending scheduling control signaling (502) (505), demultiplexing goes out the uplink data channels of subscriber equipment and handles the upstream data (506) that obtains subscriber equipment.The base station generates ACK/NACK information (501) then, and multiplexing through physical channel multiplexer (503), launches by emitter (504).
Fig. 6 is the equipment drawing that subscriber equipment is handled transmitting uplink data, and wherein ascending scheduling control signaling resolver (602) and physical channel multiplexer (605) are embodiments of the present invention.Subscriber equipment receives through receiving system (604), physical channel demodulation multiplexer (603) demultiplexing goes out each possible uplink scheduling control channel, then in uplink scheduling control channel resolver (602), subscriber equipment judges whether the base station has sent the control signaling to it, if subscriber equipment obtains base station assigns logic sub-frame of uplink indication information.Next, adopt method of the present invention, subscriber equipment carries out multiplexing to upstream data with the control physical channel multiplexer of the logic sub-frame of uplink indication information in the module 602 (605), and launches through emitter (604).Next receive through receiving system (604), physical channel demodulation multiplexer (603) demultiplexing goes out the ACK/NACK information (601) that the base station sends.
In communication system, an important design object is power saving.From the angle of power saving, the most direct method is exactly to reduce the time that subscriber equipment sends and/or receives, and it is generally good than the power saving effect that reduces time of reception wherein to reduce the power saving effect that the transmitting time of subscriber equipment brings.In actual communication systems, subscriber equipment is divided into two classes in the information that up direction sends: upstream data and ascending control information.So from the angle of power saving, need make upstream data and ascending control information as much as possible on identical timing position, promptly in same TTI, send.The ascending control information of subscriber equipment mainly comprises two kinds of ACK/NACK information and CQI information.
The timing that subscriber equipment sends ACK/NACK information is decided by that the base station sends the timing of the downlink data of subscriber equipment, promptly receive downlink data from the base station from subscriber equipment, sending to subscriber equipment needs to have sufficient time between the ACK/NACK information to downlink data operation such as decode.Subscriber equipment transmission upstream data and base station send corresponding ACK/NACK information needs to satisfy similarly timing requirement equally.From the angle of maximization dispatching flexibility, downlink data transmission and transmitting uplink data are preferably independently.From the angle of power saving, need configure user equipment in identical timing, to send upstream data and ACK/NACK information simultaneously.
A kind of method that realizes is to depend on base station dispatcher, promptly when the base station needs scheduling user equipment to transmit ascending data, if the current downlink data transmission that exists simultaneously this subscriber equipment, then the base station distributes uplink channel resources to be used for transmitting uplink data in the sub-frame of uplink at the uplink ACK/NACK channel place of the down channel resources correspondence of this subscriber equipment, thereby realizes subscriber equipment while transmit ascending data and ACK/NACK information in same subframe.This transmission is equally applicable to send simultaneously CQI information and upstream data, and this is that uplink data channels is distributed in the base station in the subframe at the CQI of subscriber equipment channel place, thereby subscriber equipment sends CQI and upstream data simultaneously.
The another kind of method that realizes is the uplink channel resources that the base station assigns subscriber equipment is used to carry out transmitting uplink data, if the current downlink data transmission that exists simultaneously this subscriber equipment, then under the prerequisite in the processing time that can satisfy the user's equipment downward data, adjust the timing that subscriber equipment sends ACK/NACK information, thereby subscriber equipment sends upstream data and ACK/NACK information simultaneously in the subframe that is used for transmitting uplink data of base station assigns.Adopt this method, the base station is on the uplink data channels of distributing user equipment, if the current downlink data transmission that exists simultaneously this subscriber equipment, then the base station need guarantee as far as possible that it is that time delay between the downstream data channel resource of the uplink channel resources of user equipment allocation and this subscriber equipment can be more than or equal to the processing time of subscriber equipment to downlink data.Because base station dispatcher need be considered various factors for each user equipment allocation resource the time, give the uplink data channels of this subscriber equipment and the timing relationship of its downstream data channel according to the base station actual allocated, when their time delay can satisfy subscriber equipment to processing time of downlink data, subscriber equipment can transmit its ACK/NACK information and upstream data simultaneously; When their time delay can not satisfy subscriber equipment to processing time of downlink data, subscriber equipment have in different timings, send respectively its ACK/NACK information and upstream data.This transmission is equally applicable to send simultaneously CQI information and upstream data, and promptly subscriber equipment changes the transmit timing of CQI, thereby transmits CQI and upstream data simultaneously in the subframe at the uplink data channels place of base station assigns.
It is to be used for FDD system or TDD system that the present invention does not limit top method.Distinguish according to the characteristic of business simultaneously, it is to be used for dynamic dispatching or persistent scheduling that the present invention does not limit top method.
Fig. 9 is the equipment drawing that subscriber equipment is handled uplink, and wherein physical channel multiplexer (903) is embodiment of the present invention.Subscriber equipment receives through receiving system (904), and physical channel demodulation multiplexer (905) demultiplexing is also handled the downlink data (906) that the base station sends, and generate corresponding ACK/NACK information (901); Then, subscriber equipment is multiplexed into ACK/NACK information (901) and upstream data (902) on the same sub-frame of uplink through physical channel multiplexer (903), and by emitter (904) emission.Next receive through receiving system (904), physical channel demodulation multiplexer (905) demultiplexing goes out the ACK/NACK information (907) that the base station sends.
Figure 10 is the equipment drawing that uplink is handled in the base station, and wherein physical channel demodulation multiplexer (1003) is embodiment of the present invention.The base station to the downlink data (1006) of subscriber equipment after physical channel multiplexer (1005) is multiplexing, launch through emitter (1004).The base station receives upward signal by receiving system (1004), and go out ACK/NACK information (1001) and the upstream data (1002) that subscriber equipment sends, and obtain corresponding ACK/NACK information (1007) after the processing through physical channel demodulation multiplexer (1003) demultiplexing in same sub-frame of uplink; Next, the base station is multiplexing through physical channel multiplexer (1005) ACK/NACK information (1007), launches by emitter (1004).
Embodiment
This part has provided four embodiment of this invention, and is too tediously long for fear of the description that makes this patent, in the following description, omitted the detailed description of function that the public is known or device etc.
First embodiment
Be that example is described method of the present invention with LTE A-TDD system in the present embodiment, described method is equally applicable to general LTE TDD system.Here suppose up-＞down conversion point between subframe #3 and subframe #4, promptly in each up-downgoing change-over period, 3 sub-frame of uplink and 4 descending sub frames are arranged.Here supposing that subscriber equipment only is distributed in the sub-frame of uplink in a uplink transmission cycle transmits.
Fig. 3 is the schematic diagram of the different jump pattern of three cell configuration.Here the situation of change that shows the sub-frame of uplink that subscriber equipment takies in three sub-districts of continuous 3 uplink transmission cycle (301～303).Corresponding first sub-district of wherein two-dimentional running time-frequency resource figure (304～306); Corresponding second sub-district of two dimension running time-frequency resource figure (309～309); Corresponding the 3rd sub-district of two dimension running time-frequency resource figure (310～312).For simplicity, the sub-frame of uplink situation of change of a subscriber equipment is only expressed in each sub-district, and supposes the identical upstream frequency resource of these 3 user equipment allocation.Because each has 3 sub-frame of uplink in the up-downgoing change-over period, so can obtain 3 different sub-frame of uplink changing patterns according to alternative manner of the present invention, promptly iterative formula is S
Next=mod (S
Curr+ k, 3), S here
CurrThe sequence number of the sub-frame of uplink that takies when being the current uplink of subscriber equipment, S
NextBe the sequence number of the sub-frame of uplink that takies when uplink next time of subscriber equipment, k is the index of changing pattern, k=0, and 1 ... 2.In Fig. 3, first sub-district utilizes first subframe changing pattern (k=0); Second sub-district utilizes second subframe changing pattern (k=1); The 3rd sub-district utilizes the 3rd subframe changing pattern (k=2).
As shown in Figure 3, each uplink of the subscriber equipment in first sub-district all takies identical sub-frame of uplink, i.e. subframe U0 (304～306); The uplink of the subscriber equipment in second sub-district takies sub-frame of uplink U0 (307), U1 (308) and U2 (309) successively; The uplink of the subscriber equipment in the 3rd sub-district takies sub-frame of uplink U0 (310), U2 (311) and U1 (312) successively.Obviously, these 3 subscriber equipmenies only disturb in first uplink transmission cycle (301) in 3 uplink transmission cycle (301～303) each other, and the resource that takies in the line period (302 and 303) on other two is quadrature in time, this also means the subscriber equipment that disturbs in the line period on these two (302 and 303) from other simultaneously, thereby has realized disturbing average effect.
Second embodiment
Identical with first embodiment, be that example is described method of the present invention with LTE A-TDD system in the present embodiment, described method is equally applicable to general LTE TDD system.Here suppose up-＞down conversion point between subframe #3 and subframe #4, promptly in each up-downgoing change-over period, 3 sub-frame of uplink and 4 descending sub frames are arranged.Here supposing that subscriber equipment is distributed in two sub-frame of uplink in a uplink transmission cycle transmits.
Fig. 4 is the schematic diagram of the different jump pattern of three cell configuration.Similar with Fig. 3, show the situation of change of the sub-frame of uplink that subscriber equipment takies in three sub-districts of continuous 3 uplink transmission cycle (401～403) here.Corresponding first sub-district of wherein two-dimentional running time-frequency resource figure (404～406); Corresponding second sub-district of two dimension running time-frequency resource figure (409～409); Corresponding the 3rd sub-district of two dimension running time-frequency resource figure (410～412).For simplicity, the sub-frame of uplink situation of change of a subscriber equipment is only expressed in each sub-district, and supposes the identical upstream frequency resource of these 3 user equipment allocation.Here suppose that each subscriber equipment distributes two subframes in each uplink transmission cycle, and with the color differentiating of different depth.Similar with Fig. 3, because each has 3 sub-frame of uplink in the up-downgoing change-over period, so can be according to iterative formula S
Next=mod (S
Curr+ k, 3) obtain 3 different sub-frame of uplink changing patterns.First sub-district utilizes first subframe changing pattern (k=0); Second sub-district utilizes second subframe changing pattern (k=1); The 3rd sub-district utilizes the 3rd subframe changing pattern (k=2).Note because in the example of Fig. 4, user equipment allocation two subframes, so need be according to iterative formula S
Next=mod (S
Curr+ k, 3) calculate the subframe sequence number of each subframe correspondence when uplink next time respectively.When sending the information of different transmission blocks respectively in two sub-frame of uplink of subscriber equipment, subscriber equipment is determined the rule of conversion of its used sub-frame of uplink respectively to each transmission block.
As shown in Figure 4, each uplink of the subscriber equipment in first sub-district all takies identical sub-frame of uplink, i.e. subframe U0 and U1 (404～406), and just subscriber equipment transmission block only takies subframe U0; Another transmission block only takies subframe U1.The uplink of the subscriber equipment in second sub-district takies sub-frame of uplink U0 and U1 (407), U1 and U2 (408), U2 and U0 (409) successively, here subframe change sequence [U0, U1, U2] be the Changing Pattern of sub-frame of uplink of first transmission block of subscriber equipment; Subframe change sequence [U1, U2, U0] is the Changing Pattern of sub-frame of uplink of second transmission block of subscriber equipment.The uplink of the subscriber equipment in the 3rd sub-district takies sub-frame of uplink U0 and U1 (410), U2 and U0 (411), U1 and U2 (412) successively, here subframe change sequence [U0, U2, U1] be the Changing Pattern of sub-frame of uplink of first transmission block of subscriber equipment; Subframe change sequence [U1, U0, U2] is the Changing Pattern of sub-frame of uplink of second transmission block of subscriber equipment.Adopt the method for the sub-frame of uplink that each transmission block of variation subscriber equipment shown in Figure 3 uses, the interference of subscriber equipment or from other subscriber equipmenies beyond these 3 subscriber equipmenies, perhaps from the different transmission block of these 3 subscriber equipmenies, thereby realized disturbing average effect.
The 3rd embodiment
Present embodiment is an example with LTE FDD system, describes the base station scheduling subscriber equipment sends upstream data and ACK/NACK information in identical timing method.Here be scheduling to example with persistent.Here suppose that the cycle that HARQ retransmits is 5 subframes, and the relative timing of downlink data and corresponding ACK/NACK channel is the same with downlink data with the relative timing of ACK/NACK channel accordingly, promptly all equals 3 subframes.
As shown in Figure 7, the base station sends downlink data (701) and to the ACK/NACK information (702) of former transmitting uplink data; Next subscriber equipment sends upstream data and simultaneously to the ACK/NACK information (707) of downlink data (701) in identical subframe; Then base station re-transmission downlink data (703) and transmission are to the ACK/NACK information (704) of upstream data (707); Then subscriber equipment retransmits upstream data and to the ACK/NACK information (708) of downlink data (703) in identical subframe; And the like.By in identical subframe, sending upstream data and ACK/NACK information simultaneously, thereby reduced the power consumption of subscriber equipment.
The 4th embodiment
Present embodiment is an example with LTE A-TDD system, describes the base station scheduling subscriber equipment sends upstream data and ACK/NACK information in identical timing method.Described method is equally applicable to general LTE TDD system.Suppose that LTE A-TDD system comprises 3 sub-frame of uplink and 4 descending sub frames in each field.Here suppose that the cycle that HARQ retransmits is 5ms, promptly equal the time span of field.
Fig. 8 is the schematic diagram of base station and subscriber equipment up-downgoing data interaction.At first suppose base station independently collocating uplink transfer of data and downlink data transmission.Subgraph (715) is the example of downlink data transmission, here the downlink data (701,703) of first subframe transmission user equipment in each downlink transfer cycle of base station assigns; Determine that according to the shared descending sub frame of downlink data transmission the sub-frame of uplink of subscriber equipment transmission ACK/NACK information is first sub-frame of uplink (702,704) in uplink transmission cycle.Subgraph (716) is the example of transmitting uplink data, here the upstream data of second of each uplink transmission cycle of base station assigns subframe transmission user equipment (705,707); Determine that according to the shared sub-frame of uplink of transmitting uplink data the descending sub frame of base station transmission ACK/NACK information is the 3rd descending sub frame (706,708) in the downlink transfer cycle.Comprehensive subgraph (715) and subgraph (716), when the transmitting uplink data of separate configurations subscriber equipment and downlink data transmission, subscriber equipment is different in the timing of uplink data sending and ACK/NACK, thereby has increased the power consumption of subscriber equipment.Shown in subgraph (717), when base stations united collocating uplink transfer of data and downlink data transmission, the base station guarantees that the time delay between the down channel resources of the uplink data channels resource of its distribution and its distribution satisfies the processing time of subscriber equipment to downlink data, thereby subscriber equipment can change its timing that sends ACK/NACK information, and sends simultaneously with upstream data in the subframe at uplink data channels place.Shown in subgraph (717), the downlink data (709,711) of first subframe transmission user equipment in each downlink transfer cycle of base station; Subscriber equipment does not use the subscriber equipment of determining according to the shared descending sub frame of downlink data transmission to send the sub-frame of uplink of ACK/NACK information, but send upstream data and ACK/NACK information (710,713) simultaneously at second sub-frame of uplink of the uplink transmission cycle at the uplink data channels place of base station assigns, the same with subgraph (716), determine that according to the shared sub-frame of uplink of transmitting uplink data the descending sub frame of base station transmission ACK/NACK information is the 3rd descending sub frame (712,714) in the downlink transfer cycle.
Claims (24)
1. a method that strengthens synchronous HARQ comprises the steps:
A) the specific sub-frame of uplink changing pattern in base station configuration sub-district;
B) base station sends logic sub-frame of uplink indication information in the uplink scheduling control channel;
C) subscriber equipment in conjunction with the sub-frame of uplink changing pattern of its Serving cell configuration, obtains the sequence number of the physical uplink subframe of base station assigns according to logic sub-frame of uplink indication information;
D) subscriber equipment sends or retransmits upstream data in distributing to its sub-frame of uplink.
2. method according to claim 1 is characterized in that in step a), utilizes the method definition sub-frame of uplink changing pattern of iteration.
3. method according to claim 1 is characterized in that in step a) iterative formula is S
Next=mod (S
Curr+ k, N
UL), the sequence number of the sub-frame of uplink that configure user equipment takies when transmitting is next time passed through formula S
Next=mod (S
Curr+ k, N
UL) calculate, here, S
NextBe the sequence number of the sub-frame of uplink that when next time transmitting, takies of subscriber equipment, S
CurrBe the sequence number of the current sub-frame of uplink that takies of uplink of subscriber equipment, N
ULBe the number of sub-frame of uplink in each up transmission cycle, k is the index of changing pattern, k=0, and 1 ... N
UL-1.
4. method according to claim 3, it is characterized in that, base station distributing user equipment in each up transmission cycle transmits on a sub-frame of uplink, can calculate the subframe sequence number that this sub-frame of uplink changes to according to top iterative formula in follow-up uplink.
5. method according to claim 3, it is characterized in that, base station distributing user equipment in each up transmission cycle transmits on n sub-frame of uplink, calculates the subframe sequence number that each sub-frame of uplink changes to respectively according to above-mentioned iterative formula in follow-up uplink.
6. method according to claim 5 is characterized in that, when a base station assigns n sub-frame of uplink was used to transmit n transmission block to subscriber equipment, the employed sub-frame of uplink of each transmission block obtained the pattern of its variation respectively according to top iterative formula.
7. method according to claim 1 is characterized in that in step a), by D-BCH or the specific sub-frame of uplink changing pattern of S-BCH allocating cell.
8. method according to claim 1 is characterized in that in step a), the mapping relations of definition sub-frame of uplink changing pattern and cell ID (Cell ID) or cell group identification (Cell Group ID) etc.
9. method according to claim 1 is characterized in that in step b), and logic indication information indication base station is the sequence number of one or more logic subframe of user equipment allocation.
10. method according to claim 1 is characterized in that in step b), and the logic indication information is the bit mapping.
11. method according to claim 1 is characterized in that in step c), the sequence number of each physical uplink subframe that takies when obtaining distributing to the first time uplink of subscriber equipment according to the logic indication information in the uplink scheduling control channel.
12. method according to claim 1 is characterized in that in step c), obtains the sequence number of the sub-frame of uplink that follow-up uplink takies according to the sequence number of each physical uplink subframe that the first time, uplink took and iterative formula.
13. the equipment of transmitting uplink data is handled in a base station, comprises transmission/reception, also comprises:
A) ascending scheduling control signaling maker is used to generate ascending scheduling control signaling, wherein comprises the logic indication information of the sub-frame of uplink of indication distribution;
B) physical channel multiplexer module is used for multiplexing down physical channel;
C) physical channel demodulation multiplexer is used for going out according to logic sub-frame of uplink indication information demultiplexing the uplink data channels of subscriber equipment.
14. a subscriber equipment is handled the equipment of transmitting uplink data, comprises transmission/reception, also comprises:
A) ascending scheduling control signaling resolver is used to judge whether the base station has sent the control signaling to it, if subscriber equipment obtains base station assigns logic sub-frame of uplink indication information;
B) physical channel demodulation multiplexer module is used for demultiplexing and goes out down physical channel;
C) physical channel multiplexer module is used for according to the multiplexing uplink data channels of logic sub-frame of uplink indication information.
15. a method of controlling the timing relationship of upstream data and ascending control information comprises the steps:
A) resource of the resource of base station assigns downlink data transmission and transmitting uplink data;
B) subscriber equipment sends upstream data and ascending control information in identical sub-frame of uplink.
16. method according to claim 15 is characterized in that in step a), the base station distributes uplink channel resources to be used for transmitting uplink data in the sub-frame of uplink at the uplink ACK/NACK channel place of the down channel resources correspondence of this subscriber equipment.
17. method according to claim 15 is characterized in that in step a), the base station distributes ascending resource to be used for transmitting uplink data in the subframe at the CQI of subscriber equipment channel place.
18. method according to claim 15, it is characterized in that in step a), the timing that subscriber equipment sends ACK/NACK information is adjusted in the base station, thereby subscriber equipment sends upstream data and ACK/NACK information simultaneously in the subframe that is used for transmitting uplink data of base station assigns.
19. method according to claim 15, it is characterized in that in step a) the base station is that the time delay between the downstream data channel resource of the uplink channel resources of user equipment allocation and this subscriber equipment can be more than or equal to the processing time of subscriber equipment to downlink data.
20. method according to claim 15, it is characterized in that in step b), when the time delay of uplink data channels and downstream data channel satisfied subscriber equipment to processing time of downlink data, subscriber equipment can transmit its ACK/NACK information and upstream data simultaneously.
21. method according to claim 15, it is characterized in that in step b), when the time delay of uplink data channels and downstream data channel did not satisfy subscriber equipment to processing time of downlink data, subscriber equipment sent ACK/NACK information and upstream data respectively in different timings.
22. method according to claim 15 is characterized in that in step b), subscriber equipment changes the transmit timing of CQI, thereby transmits CQI and upstream data simultaneously in the subframe at the uplink data channels place of base station assigns.
23. a subscriber equipment is handled the equipment of uplink, comprises transmission/reception, also comprises:
A) physical channel multiplexer module is used for ACK/NACK information and upstream data are multiplexed into same sub-frame of uplink.
B) physical channel demodulation multiplexer module is used for demultiplexing upstream data and ACK/NACK information.
24. the equipment of uplink is handled in a base station, comprises transmission/reception, also comprises:
A) physical channel demodulation multiplexer module is used for that demultiplexing goes out ACK/NACK information and upstream data in same subframe.
B) physical channel multiplexer module is used for multiplexing downlink data and ACK/NACK information.
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