CN101499889A - Method and apparatus for obtaining uplink and downlink timeslot ratio information of time division duplex system - Google Patents
Method and apparatus for obtaining uplink and downlink timeslot ratio information of time division duplex system Download PDFInfo
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- CN101499889A CN101499889A CNA2008100575732A CN200810057573A CN101499889A CN 101499889 A CN101499889 A CN 101499889A CN A2008100575732 A CNA2008100575732 A CN A2008100575732A CN 200810057573 A CN200810057573 A CN 200810057573A CN 101499889 A CN101499889 A CN 101499889A
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Abstract
The invention discloses a method for obtaining upstream and downstream time slot proportion information, which comprises the following steps: resources that are occupied by a physical hybrid automatic retransmission indicating channel PHICH in a specified subframe are determined; resources that are occupied by a physical downstream control channel PDCCH in the specified subframe are determined according to the resources occupied by the PHICH; signaling indicating information that is transmitted in the PDCCH channel is detected; and a dynamic broadcast channel D-BCH is detected according to the signaling indicating information transmitted in the PDCCH channel, thus obtaining the upstream and downstream time slot proportion information that is transmitted in the D-BCH. The invention simultaneously discloses a device for obtaining the upstream and downstream time slot proportion information, the method and the device can be adopted for obtaining upstream and downstream time slot proportion.
Description
Technical field
The present invention relates to time division duplex (TDD) technical field, relate in particular to the method and the device of a kind of TDD of obtaining system uplink and downlink timeslot ratio information.
Background technology
At present, insert (HSDPA in high speed downlink packet, High Speed Downlink PacketAccess), high speed uplink packet inserts (HSUPA, High Speed Uplink Packet Access) and following Long Term Evolution (the Long Term Evolution, LTE) in the technology, for the data block to error of transmission is fed back re-transmission fast, and merge the information that misdata is carried that makes full use of by data block, mixing automatic repeat requests (HARQ, Hybrid Automatic Repeat Request) technology is adopted by plurality of communication systems as a kind of solution preferably.A lot of communication systems, HSDPA for example, the HSUPA and following LTE adopt that multidiameter delay stops and wait the HARQ agreement, to support continuous scheduling and the transmission to data.What is called is stopped etc., refer to use certain HARQ process transmission packet exactly after, before receiving feedback information, can not continue to use other any data of this process transmission, but the wait feedback information that stops.The advantage of HARQ agreement is fairly simple, but efficiency of transmission is lower, waits the HARQ agreement and adopt that multidiameter delay stops, and starts a plurality of HARQ processes simultaneously, can remedy the low shortcoming of efficiency of transmission.Its basic thought is to dispose simultaneously a plurality of HARQ processes, in the feedback information process of certain HARQ process of wait, can continue to use other idle process transmits data packets.
Uploading the detailed process that data instance adopts HARQ to carry out transfer of data with user terminal (UE) to network node (NB, NODE B) comprises:
UE sends a packet A to NB, and waits for the feedback information of NB, and whether the packet that the NB check is received is correct; If correct, then return affirmation (ACK, Acknowledgement) message, otherwise return (NACK, Not Acknowledgement) unconfirmed message to UE; UE judges the feedback message that receives; If ACK message then continues to transmit next new data packets B to NB; If NACK message then resends packet A to NB.
In the HARQ process, regulation must use identical HARQ process to retransmit, so that data receiver merges the data block of makeing mistakes for the data block of loading error occurring.According to retransmission time predefine whether, the HARQ agreement can be divided into synchronous HARQ and two kinds of schemes of asynchronous HARQ.
In the synchronous HARQ scheme, retransmission time is predefined, with the data of transmission first make mistakes the time be carved with fixing sequential relationship.In asynchronous HARQ solution, the retransmission time of data block is not predefined, but is dynamically determined by scheduler, is retransmitted the HARQ process of required use by scheduler calculated data piece.
And in asynchronous HARQ scheme,, therefore need the extra signaling content that increases because the HARQ process of transmission data needs to come the receiving terminal of notification data transmission by scheduler by signaling, and increased the data volume of the signaling of transmission, wasted Internet resources; The synchronous HARQ scheme does not then need this extra signaling consumption.
For the communication system of Frequency Division Duplexing (FDD) (FDD) pattern,, therefore, be well suited for using the synchronous HARQ scheme because the data of its uplink and downlink all are to carry out simultaneously, transmit continuously.The implementation method of FDD system synchronization HARQ is as follows:
Will be from using certain HARQ process transmission data to receiving that the ACK/NACK feedback information also can reuse the time interval HARQ_RTT (Round Trip Time) of these process transmission data, fixedly installing is a HARQ protocol Data Unit (PDU, Protocol Data Unit) once transmission takies the integral multiple of Transmission Time Interval (TTI, Transmission Time Interval) of resource.When data sending terminal receives the NACK message that data receiver is sent, in the time of need carrying out data re-transmission, the HARQ process numbering (HARQ process id) of required use can be numbered (TTI Number) by TTI the HARQ_RTT delivery is obtained, i.e. HARQ process id=(TTI Number) mod (HARQ_RTT).
For example, when HARQ_RTT=4TTI, the corresponding relation of TTI number and HARQ process id is as shown in table 1:
Table 1
| |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
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0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 |
By fixing HARQ_RTT, the transfer of data transmitting terminal can calculate the HARQ process id of the required use of data re-transmission by simple delivery, thereby realizes the transmission of synchronous HARQ.
But, in the TDD system, HARQ_RTT not only is subjected to the influence of device processes time delay, also be subjected to the influence of the position of up-downgoing transfer point, in order to simplify the synchronous HARQ scheme in the TDD system, tend to according to the device processes time delay, as HARQ_RTT, and time-gap number and process id have binding relationship with a kind of multiple of Frame length.As shown in Figure 1, the HARQ_RTT Frame length that equals 2 times; The corresponding respectively HARQ Process id of two ascending time slots that is numbered the Frame of odd number is 1,2; The corresponding respectively HARQ Process id of two ascending time slots that is numbered the Frame of even number is 3,4.As can be seen, the RTT of TDD system is relevant with uplink and downlink timeslot ratio.
As seen, in the TDD system, uplink and downlink timeslot ratio is relevant with RTT, and the key of RTT to be the TDD system carry out HARQ transmission, therefore, the uplink and downlink timeslot ratio that obtains in the TDD system is vital.And, still do not have a kind of concrete method of obtaining uplink and downlink timeslot ratio now at the uplink and downlink timeslot ratio in the TDD system.
Summary of the invention
The invention provides a kind of method and device that obtains uplink and downlink timeslot ratio information,, carry out follow-up HARQ transmission so that obtain uplink and downlink timeslot ratio information.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of uplink and downlink timeslot ratio information method of obtaining comprises:
Determine the resource that physical mixed automatic re-transmission indicating channel PHICH takies in the specific sub-frame;
According to the resource that described PHICH takies, determine the resource that physical downlink control channel PDCCH takies in the described specific sub-frame, the signaling indication information that transmits in the PDCCH channel is detected;
According to the signaling indication information that transmits in the described PDCCH channel, D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
Preferably, this method further comprises: the PHICH resource that sets in advance in the described specific sub-frame does not change with described uplink and downlink timeslot ratio.
Preferably, the described PHICH resource that sets in advance in the specific sub-frame does not change with described uplink and downlink timeslot ratio and comprises:
Set in advance the corresponding sub-frame of uplink of PHICH resource in the described specific sub-frame.
Preferably, the described PHICH resource that sets in advance in the specific sub-frame does not change with described uplink and downlink timeslot ratio and comprises:
Set in advance the corresponding zero sub-frame of uplink of PHICH resource in the described specific sub-frame.
Preferably, before the resource that PHICH takies in described definite specific sub-frame, further comprise:
Receive main broadcast channel P-BCH, obtain the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH;
The resource that PHICH takies in described definite specific sub-frame comprises:
According to setting in advance of the PHICH in the specific sub-frame, and the indication of PHICH resource, transport format information and the system bandwidth information of carrying among the described P-BCH, determine the physical resource that PHICH takies in the specific sub-frame.
Preferably, described specific sub-frame is the subframe 5 in 10 milliseconds of length radio frames of tdd systems.
A kind of device that obtains uplink and downlink timeslot ratio information of time division duplex system comprises: PHICH determining unit, PDCCH determining unit and acquiring unit; Wherein,
Described PHICH determining unit is used for the resource of determining that specific sub-frame PHICH takies;
Described PDCCH determining unit is used for the resource that takies according to the PHICH that described PHICH determining unit is determined, determines the resource that PDCCH takies in the described specific sub-frame, and the signaling indication information that transmits in the PDCCH channel is detected;
Described acquiring unit is used for the signaling indication information that transmits according to the described PDCCH channel that described PDCCH determining unit detects, and D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
Preferably, this device further comprises: the unit is set,
The described unit that is provided with is used to be provided with the PHICH resource and does not change with described uplink and downlink timeslot ratio, and the information that is provided with is sent to described PHICH determining unit.
Preferably, described corresponding sub-frame of uplink of PHICH resource that the unit is used for being provided with described specific sub-frame is set, perhaps, is used for being provided with the corresponding zero sub-frame of uplink of PHICH resource of described specific sub-frame.
Preferably, this device further comprises: receiving element;
Described receiving element is used to receive P-BCH, obtains the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH;
Described PHICH determining unit is used for the indication of PHICH resource, transport format information and the system bandwidth information of the described transmission that receives according to the described setting that the unit is set and described receiving element, determines the physical resource that PHICH takies in the specific sub-frame.
From such scheme as can be seen, this resource of the present invention by determining that physical mixed automatic re-transmission indicating channel PHICH takies in the specific sub-frame, the resource that takies according to described PHICH, determine the resource that physical downlink control channel PDCCH takies in the described specific sub-frame, the signaling indication information that transmits in the PDCCH channel is detected, thereby realized the signaling indication information that transmits according in the described PDCCH channel, D-BCH detects to Dynamic Broadcast Channel, obtain the uplink and downlink timeslot ratio information that transmits among the D-BCH, help the transmission of the follow-up HARQ of carrying out.
Further, because the PHICH resource is relevant with uplink and downlink timeslot ratio in the prior art, the present invention does not change with described uplink and downlink timeslot ratio by setting in advance the PHICH resource, can avoid the endless loop that causes when obtaining the time slot ratio of up-downgoing.
Description of drawings
Fig. 1 is the multiple sub-frame allocation form schematic diagram of LTE TDD system with Frame length;
Fig. 2 is for obtaining the method flow diagram of uplink and downlink timeslot ratio information in the one embodiment of the invention;
Fig. 3 is a flow chart of realizing the tdd systems mixed automatic retransferring method in the one embodiment of the invention;
Fig. 4 in the one embodiment of the invention after obtaining uplink and downlink timeslot ratio information 1:3 the transmission schematic diagram of HARQ;
Fig. 4 (a) to Fig. 4 (f) in the one embodiment of the invention after obtaining other uplink and downlink timeslot ratio information the transmission schematic diagram of HARQ;
Fig. 5 in the another embodiment of the present invention after obtaining uplink and downlink timeslot ratio information 1:3 another transmission schematic diagram of HARQ;
Fig. 6 (a) to Fig. 6 (f) in the one embodiment of the invention after obtaining other uplink and downlink timeslot ratio information another transmission schematic diagram of HARQ;
Fig. 7 is for obtaining the structure drawing of device of uplink and downlink timeslot ratio information in the one embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Referring to Fig. 2, a kind of method flow diagram that obtains uplink and downlink timeslot ratio information of time division duplex system that Fig. 2 provides for the embodiment of the invention.In one embodiment of the invention, set in advance that the PHICH resource does not change with described uplink and downlink timeslot ratio in the specific sub-frame, wherein, specific sub-frame is the subframe 5 in 10 milliseconds of length radio frames of TDD system.Further, setting in advance PHICH resource in the specific sub-frame does not change and can realize by the corresponding sub-frame of uplink of PHICH resource that sets in advance in the described specific sub-frame with described uplink and downlink timeslot ratio; Perhaps, realize by the corresponding zero sub-frame of uplink of PHICH resource that sets in advance in the described specific sub-frame.Like this, as shown in Figure 2, this flow process may further comprise the steps:
Step 201 is determined the resource that physical mixed automatic re-transmission indicating channel PHICH takies in the specific sub-frame.
In the present embodiment, PHICH is used to indicate the response message for uplink transmission data, i.e. ACK/NACK information.According to setting, PHICH can take first OFDM (OFDM) symbol, perhaps removes three groups of four continuous PRE after pilot tone and the shared resource of physical control channel format indication channel (PCFICH) in first three OFDM symbol.
The PHICH resource information is relevant with system configuration, and is for example relevant with the up-link bandwidth, if its up-link bandwidth of certain system is bigger, so required PHICH resource is also just corresponding bigger.In addition, concerning the TDD system, different uplink and downlink timeslot ratios also has decisive action to the PHICH resource size, has for example disposed more sub-frame of uplink in the TDD system, just needs more PHICH resource to carry the indication information that ascending HARQ is replied so in the descending sub frame.
In the prior art, the resource that PHICH takies is relevant with the TDD uplink and downlink timeslot ratio information, and it has different explanations according to the time slot ratio difference.The PHICH resource does not change with described uplink and downlink timeslot ratio present embodiment in 10 milliseconds of subframes 5 in the length radio frames by setting in advance, and determines the resource that PHICH takies in 10 milliseconds of subframes 5 in the length radio frames.
In the present embodiment, before the resource that PHICH takies in above-mentioned definite specific sub-frame, further can comprise: receive main broadcast channel P-BCH, obtain the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH; Like this, the resource that PHICH takies in above-mentioned definite specific sub-frame can comprise:
According to setting in advance of the PHICH in the specific sub-frame, and the indication of PHICH resource, transport format information and the system bandwidth information of carrying among the described P-BCH, determine the physical resource that PHICH takies in the specific sub-frame.
Step 202 according to the resource that above-mentioned definite PHICH takies, is determined the resource that physical downlink control channel PDCCH takies in the described specific sub-frame, and the signaling indication information that transmits in the PDCCH channel is detected.
In the present embodiment, PDCCH is used for control informations such as bearing downlink dispatch, uplink scheduling are authorized, power control command, takies the residue PRE (1=＜n＜=3 are by the PCFICH indication) that removes pilot tone, PCFICH and the shared resource of PHICH.As seen, the OFDM symbol that takies of PDCCH and the concrete resource location that takies in the OFDM symbol depend on PCFICH and PHICH.Wherein, PCFICH can receive in the specific PRE position in first OFDM symbol of descending sub frame, and it does not need extra indication information to indicate.But the resource size of PHICH and duration be shared position and resource size and uncertain in descending sub frame.Present embodiment can be determined the resource that PDCCH takies by the resource that above-mentioned steps 201 definite PHICH take, and then can the signaling indication information that transmit in the PDCCH channel be detected, and obtains the signaling indication information that transmits in the DCCH channel.
Step 203, according to the signaling indication information that transmits in the described PDCCH channel, D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
Under situation, Dynamic Broadcast Channel (D-BCH:DynamicBroadcast Channel) the transmission uplink and downlink timeslot ratio information of wireless frame structure subframe 5 carryings.Wherein, D-BCH sends in the subframe 5 in wireless frame structure, and it also carries configuration information and other information (slightly concrete) of TDD special subframe.But, obtain the uplink and downlink timeslot ratio information that the D-BCH of 5 carryings of subframe in the wireless frame structure carries and must read by the descending scheduling signaling of the Physical Downlink Control Channel in the subframe in the wireless frame structure 5 (PDCCH) correspondence.That is to say that the UE PDCCH in this subframe 5 that need decode could go out D-BCH according to the formats of appointment, obtains the TDD uplink and downlink timeslot ratio information.The resource that resource that the PHICH that present embodiment is determined by above-mentioned steps 201 and step 202 takies and PDCCH take can performing step 203.
In addition, whether identical according to two radio half frame of radio frames division, the subframe 5 in above-mentioned 10 milliseconds of length radio frames can be following two kinds:
A: if the field of two 5ms of a radio frames division has identical structure, like this, cycle that we can say this radio frames is 5ms, and corresponding subframe 5 is the subframe 0 of second radio half frame.
B: if the field structure difference of two 5ms of a radio frames division, the cycle of such radio frames is 10ms, and corresponding subframe 5 is the subframe 5 of second radio half frame.
The embodiment of the invention is for ease of describing, and above-mentioned subframe 5 directly can be described as subframe 0 or cycle that the cycle is the 5ms frame structure is the subframe 5 of 10ms frame structure.
Therefore, introduction according to above-mentioned subframe 5, above-mentioned in subframe 5, above-mentionedly set in advance PHICH resource in the specific sub-frame and do not change and can realize by the corresponding sub-frame of uplink of PHICH resource that sets in advance in the described specific sub-frame with described uplink and downlink timeslot ratio; Perhaps, realize specifically can comprising following two kinds of situations by the corresponding zero sub-frame of uplink of PHICH resource that sets in advance in the described specific sub-frame:
First kind of situation: in the cycle is in the subframe 5 that the subframe 0 of 5ms frame structure or cycle is the 10ms frame structure, and the corresponding sub-frame of uplink of PHICH resource is set.
Second kind of situation: in the cycle is in the subframe 5 that the subframe 0 of 5ms frame structure or cycle is the 10ms frame structure, and the corresponding zero sub-frame of uplink of PHICH resource information is set.Briefly, second kind of situation is exactly to be not carry the PHICH resource in the subframe 5 that the subframe 0 of 5ms frame structure or cycle is the 10ms frame structure in the cycle.
After above-mentioned steps 203 is obtained uplink and downlink timeslot ratio information, just can carry out the transmission of HARQ, specifically adopt which kind of transmission method to determine as required.At above-mentioned two kinds of situations the tdd systems mixed automatic retransferring method process that the embodiment of the invention provides is described in detail respectively below.
Referring to Fig. 3, Fig. 3 is a particular flow sheet of realizing TDD system mixed automatic retransferring method in the one embodiment of the invention.In one embodiment of the invention, simple for narrating, be that the corresponding sub-frame of uplink of PHICH resource is the transmission that example realizes HARQ in the subframe 5 of 10ms frame structure to set in advance in the cycle.In the present embodiment, the corresponding sub-frame of uplink of PHICH resource is applicable to any time slot ratio in the subframe 5 that the above-mentioned cycle that sets in advance is the 10ms frame structure.As shown in Figure 3, this flow process specifically can may further comprise the steps:
Step 301 is determined the resource that PHICH takies in the subframe 5.
In the present embodiment, before the resource that PHICH takies in above-mentioned definite subframe 5, further comprise:
Receive main broadcast channel P-BCH, obtain the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH; Like this, determine that the resource that PHICH takies in the specific sub-frame comprises:
According to setting in advance of the PHICH of subframe 5, and the indication of PHICH resource, transport format information and the system bandwidth information of carrying among the P-BCH, determine the physical resource that PHICH takies in the subframe 5.
Step 302 according to the physical resource that PHICH in the described subframe 5 takies, determines that the PHICH in the subframe 5 takies physical resource, and the signaling indication information that transmits in the PDCCH channel is detected.
In the present embodiment, the above-mentioned uplink and downlink timeslot ratio information that obtains is to be the uplink and downlink timeslot ratio information of 10ms frame structure correspondence in the cycle, wherein, this uplink and downlink timeslot ratio information can comprise: 6 downlink data frames and 3 uplink data frames, perhaps, 7 downlink data frames and 2 uplink data frames, perhaps, 8 downlink data frames and 1 uplink data frames, perhaps, 3 downlink data frames and 5 uplink data frames.It is emphasized that present embodiment can also obtain the frame structure of other time slot ratios.
Certainly, in the present embodiment, if the above-mentioned uplink and downlink timeslot ratio information that obtains is to be the uplink and downlink timeslot ratio information of 5ms frame structure in the cycle, then this uplink and downlink timeslot ratio information can be 1 downlink data frame and 3 uplink data frames, perhaps, 2 downlink data frames and 2 uplink data frames, perhaps, 3 downlink data frames and 1 uplink data frames.It is emphasized that present embodiment can also obtain the frame structure of other time slot ratios.
Step 304 according to the above-mentioned uplink and downlink timeslot ratio information that obtains, is determined the resource that PHICH takies in each descending sub frame except that subframe 5.
In the present embodiment, the uplink and downlink timeslot ratio information that above-mentioned basis is obtained, determine that the resource that PHICH takies in each descending sub frame except that subframe 5 comprises:
Determine the resource that PHICH takies in each descending sub frame except that subframe 5 according to the transport format information that carries among the above-mentioned uplink and downlink timeslot ratio information that obtains, the pre-HARQ pattern of determining, the P-BCH and system bandwidth information.
Generally, in case uplink and downlink timeslot ratio information determines that then it can not change again, therefore, can determine the resource that PHICH takies in other descending sub frames except that subframe 5, and then can realize following step 305 according to the uplink and downlink timeslot ratio information of determining.
The time interval of the transmission data of TDD system, (RTT:Round Trip Time) was relevant with uplink and downlink timeslot ratio information, therefore, after obtaining uplink and downlink timeslot ratio information, correspondingly, the process number of the RTT of TDD system and transmission (Process Number) will be determined.Like this, can directly carry out the transmission of HARQ according to the RTT that determines and the process number of transmission.
In the application, the cycle of setting in advance is in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure during the corresponding sub-frame of uplink of PHICH resource, if utilize the cycle to carry out transmission of uplink data for the sub-frame of uplink 2 of 5ms frame structure, then under the situation that satisfies base station and UE processing delay, generally send feedback message to UE in the subframe 0 of the nearest frame structure except that the processing delay of described base station in the cycle.Perhaps, if utilize the cycle to carry out transmission of uplink data, then under the situation that satisfies base station and UE processing delay, send feedback messages to UE in the subframe 5 of the nearest frame structure except that the processing delay of base station in the cycle for the sub-frame of uplink 7 of 10ms frame structure.Certainly, under the situation that satisfies base station and UE processing delay, the cycle be the PHICH resource in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure also can be corresponding other sub-frame of uplink, concrete condition needs concrete analysis.
In the present embodiment, in the above-mentioned subframe 5, the cycle of setting in advance is that the PHICH resource does not change with uplink and downlink timeslot ratio and is applicable to any time slot ratio configuration in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure.
Further specify transmission course below to HARQ behind each uplink and downlink timeslot ratio information that obtains in the TDD system.
Referring to Fig. 4, Fig. 4 in the one embodiment of the invention after obtaining uplink and downlink timeslot ratio information the transmission schematic diagram of HARQ.In the present embodiment, if the cycle of setting in advance is sub-frame of uplink of PHICH resource bearing in the descending sub frame 0 of 5ms frame structure, with the uplink and downlink timeslot ratio information that obtains is 1 to 3, corresponding uplink and downlink timeslot ratio information is that 1 to 3 process number is 3, and RTT is that 15ms is that example explanation is carried out the method that HARQ transmits.
If the processing delay of base station and UE all is 3ms, as shown in Figure 4, each square is represented a subframe, wherein, the dark square of gray scale is used to indicate sub-frame of uplink, the shallow square of gray scale is used to indicate descending sub frame or special subframe, then the upstream data with the subframe in the process 12 is transmitted as example, after subframe 2 in process 1 is carried out transmitting uplink data, the base station sends feedback message to UE in the subframe 0 of the nearest frame structure except that the processing delay of described base station in the cycle, promptly, UE carries out transmission of uplink data in the subframe 2 in first frame structure cycle, and the base station sends feedback message to UE, certainly in the subframe 0 that except that the base station processing delay is the 3rd the frame structure cycle the 3ms, under the situation of the processing delay that satisfies base station and UE, present embodiment also can adopt the subframe 0 in other cycles to send feedback message to UE, still, and like this, will increase the delay that UE receives the feedback message of base station, also can influence the transmission of HARQ.When above-mentioned feedback message is NACK message, carry out the transmission of HARQ in the subframe 2 of the nearest frame structure except that UE processing delay and described base station processing delay in the cycle, promptly carry out the transmission of HARQ in the subframe 2 in the 4th frame structure cycle.And present embodiment can continue to carry out according to this rule, the available subframe that does not need in the wireless frame structure of correspondence in process 1.
Certainly, in the present embodiment, if the feedback message that above-mentioned UE receives is an ACK message, then the subframe 2 in the nearest frame structure except that UE processing delay and described base station processing delay is carried out the transmission of new round data, promptly carries out the transmission of HARQ in the subframe 2 in the 4th frame structure cycle.
Certainly, present embodiment also according to the method described above flow process carry out the transmission of HARQ at uplink and downlink timeslot ratio information during for other values, specifically can be referring to Fig. 4 (a) to Fig. 4 (f).
Among Fig. 4 (a), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 0 of 5ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 3 to 1, is 9 to process number that should uplink and downlink timeslot ratio information, and RTT is 15ms.
Among Fig. 4 (b), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 0 of 5ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 2 to 2, is 5 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms or 15ms.
Among Fig. 4 (c), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 6 to 3, and the process number of corresponding uplink and downlink timeslot ratio information is 3, and RTT is 10ms.
Among Fig. 4 (d), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and obtaining uplink and downlink timeslot ratio information is 7 to 2, is 5 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms or 20ms.
Among Fig. 4 (e), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 8 to 1, is 2 to process number that should uplink and downlink timeslot ratio information, and RTT is 20ms.
Among Fig. 4 (f), the cycle of setting in advance is corresponding sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 3 to 5, is 6 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms or 15ms.
Above-mentioned main HARQ transmission when having introduced the corresponding sub-frame of uplink of PHICH resource in the descending sub frame 5 that descending sub frame 0 that the cycle is the 5ms frame structure or cycle be the 10ms frame structure.At second kind of situation, promptly the cycle is that the corresponding zero sub-frame of uplink of PHICH resource also can conveniently carry out the HARQ transmission in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure.Because, cycle is not carry the PHICH resource in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure, like this, just can directly determine to be carried at the uplink and downlink timeslot ratio information among the D-BCH, be compared to first kind of situation, second kind of situation is fairly simple.
Utilize above-mentioned second kind of situation to carry out the transmission of HARQ, specifically can be referring to Fig. 5, Fig. 5 is for carrying out another schematic diagram of HARQ transmission in the one embodiment of the invention.In the present embodiment, being 1 to 3 with the uplink and downlink timeslot ratio configuration information that obtains, is 2 to process number that should uplink and downlink timeslot ratio information, and RTT is that 10ms is the method that example explanation is carried out the HARQ transmission.
If the processing delay of base station and UE all is 3ms, as shown in Figure 5, when the subframe 2 of process 1 correspondence was carried out transfer of data, the base station sent feedback message to UE in the subframe 1 of the nearest frame structure except that the processing delay of described base station in the cycle.Be that UE carries out transmission of uplink data in the subframe 2 in first frame structure cycle, the base station sends feedback message to UE in the subframe 1 that except that the base station processing delay is second frame structure cycle the 3ms, certainly, under the situation of the processing delay that satisfies base station and UE, present embodiment also can adopt the subframe 1 in other cycles to send feedback message to UE, still, and like this, will increase the delay that UE receives the feedback message of base station, also can influence the transmission of HARQ.When above-mentioned feedback message is NACK message unconfirmed, carry out the transmission of HARQ in the subframe 2 of the nearest frame structure except that UE processing delay and described base station processing delay in the cycle, promptly carry out the transmission of HARQ in the subframe 2 in the 3rd frame structure cycle.And present embodiment can continue to carry out according to this rule, does not have the available subframe of above-mentioned needs in wireless frame structure.Utilize the subframe 1 in second frame structure cycle to send feedback message in the present embodiment, be actually the descending pilot frequency (DwPTS) that utilizes the special time slot in the subframe 1 and send feedback message to UE to UE.Certainly, when corresponding 0 sub-frame of uplink of the PHICH resource information that will be carrying in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure cycle, present embodiment also according to the method described above flow process carry out the transmission of HARQ at uplink and downlink timeslot ratio information during for other values, specifically can be referring to Fig. 6 (a) to Fig. 6 (f).
Wherein, among Fig. 6 (a), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 0 of 5ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 3 to 1, is 8 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms or 15ms.
Among Fig. 6 (b), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 0 of 5ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 2 to 2, is 4 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms.
Among Fig. 6 (c), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 6 to 3, is 3 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms.
Among Fig. 6 (d), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and the uplink and downlink timeslot ratio information that obtains is 7 to 2, and to should uplink and downlink timeslot ratio information being that 7 to 2 process number is 2, RTT be 10ms.
Among Fig. 6 (e), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and uplink and downlink timeslot ratio information is 8 to 1, is 1 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms.
Among Fig. 6 (f), the cycle is the corresponding zero sub-frame of uplink of PHICH resource in the descending sub frame 5 of 10ms frame structure, and uplink and downlink timeslot ratio information is 3 to 5, is 6 to process number that should uplink and downlink timeslot ratio information, and RTT is 10ms or 15ms.
As seen, present embodiment is this is that the PHICH resource does not change with uplink and downlink timeslot ratio and goes for any time slot ratio configuration in the descending sub frame 5 that the descending sub frame 0 of 5ms frame structure or cycle is the 10ms frame structure in the cycle.In addition, it is emphasized that, the this of the embodiment of the invention is provided with the PHICH resource in the descending sub frame 5 that descending sub frame 0 that the cycle is the 5ms frame structure or cycle be the 10ms frame structure and do not change the method that realizes the HARQ transmission with uplink and downlink timeslot ratio by setting in advance, go for the HARQ of any kind of, with the arbitrary frame structure, no matter be synchronous HARQ or asynchronous HARQ, no matter how many ascending-descending subframes has in the frame, can obtain uplink and downlink timeslot ratio information, realize the HARQ transmission.
For realizing the above-mentioned method of obtaining uplink and downlink timeslot ratio information of time division duplex system, the embodiment of the invention also provides a kind of device that obtains uplink and downlink timeslot ratio information of time division duplex system.
Referring to Fig. 7, Fig. 7 obtains the uplink and downlink timeslot ratio information structure drawing of device in the one embodiment of the invention.As shown in Figure 7, this device can comprise: PHICH determining unit 701, PDCCH determining unit 702 and acquiring unit 703; Wherein,
Acquiring unit 703 is used for the signaling indication information that transmits according to the described PDCCH channel that PDCCH determining unit 702 detects, and D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
This device further can comprise: unit 704 is set.
Corresponding sub-frame of uplink of PHICH resource that unit 704 is used for being provided with described specific sub-frame is set, perhaps, is used for being provided with the corresponding zero sub-frame of uplink of PHICH resource of described specific sub-frame.
This device further can comprise: receiving element 705.
Receiving element 705 is used to receive P-BCH, obtains the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH.
As seen from the above-described embodiment, the embodiment of the invention has broken through conventional thinking, the PHICH resource does not change specific sub-frame with described uplink and downlink timeslot ratio in the specific sub-frame by setting in advance, and determines the resource that physical mixed automatic re-transmission indicating channel PHICH takies in the specific sub-frame then; According to the resource that described PHICH takies, determine the resource that physical downlink control channel PDCCH takies in the described specific sub-frame, the signaling indication information that transmits in the PDCCH channel is detected; According to the signaling indication information that transmits in the described PDCCH channel, D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH, can conveniently obtain uplink and downlink timeslot ratio information, realizes the transmission of HARQ.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is preferred embodiment of the present invention; be not to be used to limit protection scope of the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of method of obtaining uplink and downlink timeslot ratio information of time division duplex system is characterized in that, this method comprises:
Determine the resource that physical mixed automatic re-transmission indicating channel PHICH takies in the specific sub-frame;
According to the resource that described PHICH takies, determine the resource that physical downlink control channel PDCCH takies in the described specific sub-frame, the signaling indication information that transmits in the PDCCH channel is detected;
According to the signaling indication information that transmits in the described PDCCH channel, D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
2, method according to claim 1 is characterized in that, this method further comprises: set in advance that the PHICH resource does not change with described uplink and downlink timeslot ratio in the specific sub-frame.
3, method according to claim 1 and 2 is characterized in that, the described PHICH resource that sets in advance in the specific sub-frame does not change with described uplink and downlink timeslot ratio and comprises:
Set in advance the corresponding sub-frame of uplink of PHICH resource in the described specific sub-frame.
4, method according to claim 1 and 2 is characterized in that, the described PHICH resource that sets in advance in the specific sub-frame does not change with described uplink and downlink timeslot ratio and comprises:
Set in advance the corresponding zero sub-frame of uplink of PHICH resource in the described specific sub-frame.
5, method according to claim 1 is characterized in that, before the resource that PHICH takies in described definite specific sub-frame, further comprises:
Receive main broadcast channel P-BCH, obtain the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH;
The resource that PHICH takies in described definite specific sub-frame comprises:
According to setting in advance of the PHICH in the specific sub-frame, and the indication of PHICH resource, transport format information and the system bandwidth information of carrying among the described P-BCH, determine the physical resource that PHICH takies in the specific sub-frame.
6, according to each described method of claim 1-5, it is characterized in that,
Described specific sub-frame is the subframe 5 in 10 milliseconds of length radio frames of tdd systems.
7, a kind of device that obtains uplink and downlink timeslot ratio information of time division duplex system is characterized in that, this device comprises: PHICH determining unit, PDCCH determining unit and acquiring unit; Wherein,
Described PHICH determining unit is used for the resource of determining that specific sub-frame PHICH takies;
Described PDCCH determining unit is used for the resource that takies according to the PHICH that described PHICH determining unit is determined, determines the resource that PDCCH takies in the described specific sub-frame, and the signaling indication information that transmits in the PDCCH channel is detected;
Described acquiring unit is used for the signaling indication information that transmits according to the described PDCCH channel that described PDCCH determining unit detects, and D-BCH detects to Dynamic Broadcast Channel, obtains the uplink and downlink timeslot ratio information that transmits among the D-BCH.
8, device according to claim 7 is characterized in that, this device further comprises: the unit is set,
The described unit that is provided with is used for being provided with specific sub-frame PHICH resource and does not change with described uplink and downlink timeslot ratio, and the information that is provided with is sent to described PHICH determining unit.
9, according to claim 7 or 8 described devices, it is characterized in that, described corresponding sub-frame of uplink of PHICH resource that the unit is used for being provided with described specific sub-frame is set, perhaps, be used for being provided with the corresponding zero sub-frame of uplink of PHICH resource of described specific sub-frame.
10, device according to claim 7 is characterized in that, this device further comprises: receiving element;
Described receiving element is used to receive P-BCH, obtains the indication of PHICH resource, transport format information and the system bandwidth information transmitted among the P-BCH;
Described PHICH determining unit is used for the indication of PHICH resource, transport format information and the system bandwidth information of the described transmission that receives according to the described setting that the unit is set and described receiving element, determines the physical resource that PHICH takies in the specific sub-frame.
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