CN100420334C - Method of blind detecting transfer patterns - Google Patents
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Abstract
The present invention discloses a blind detection method for transmission formats, which comprises that: according to a configured combination set of the transmission formats, the number of physical channels needed by each transmission format combination of the combination set during transmission is calculated, and corresponding relations between the transmission format combinations and the number of the physical channels are established; when data is received, the number of the physical channels actually occupied by the current wireless frame is detected; according to the number of the actually occupied physical channels and the corresponding relations between the transmission format combinations and the number of the physical channels, a candidate set of the transmission format combinations corresponding to the current wireless frame is established. After the wireless frame is mapped into an encoding combination transmitting channel, the transmission format combinations corresponding to the current encoding combination transmitting channel are selected from the candidate set of the transmission format combinations according to data information loaded on the encoding combination channel. The method of the present invention can reduce the complexity of the blind detection method for transmission formats and the calculation amount of decoding verification, and has a large application range.
Description
Technical field
The present invention relates to the detection technique of transformat in the 3-G (Generation Three mobile communication system), specially refer to a kind of method of transmission format blind detection.
Background technology
In 3-G (Generation Three mobile communication system), data carried by data is to be data transmission block or the data transmission block collection that occurs in the cycle with Transmission Time Interval (TTI) on each transmission channel, and different transmission channels can have different TTI.In the process of transmitting of data, the transmission channel that carries these data transmission blocks is together multiplexing after chnnel coding, form coded combination transmission channel (CCTrCH, Coded Composite TransportChannel), and then with CCTrCH be that unit carries out the cutting apart of physical channel, interweaves, transmission channel is to the mapping of physical channel and the distribution of physical channel resources.
For the data transmission block of representing transmission channel bearing or the information of data transmission block collection, 3-G (Generation Three mobile communication system) has defined the notion of TFS Transport Format Set (TFS, Transport Format Set).Described TFS is made up of a plurality of transformats (TF, Transport Format), and wherein each TF has defined the information bit that a transmission channel data carried by data transmission block number and each data transmission block in a TTI comprise.When a plurality of transmission channels are multiplexing when becoming a CCTrCH, the TF of all these transmission channels combines and forms transformat combination (TFC, Transport Format Combination), the set of all these TFC has then constituted transport format combination set (TFCS).
Usually, when setting up service chaining, the radio network controller of 3-G (Generation Three mobile communication system) (RNC) can be respectively to relevant base station node B and this professional uplink and downlink CCTrCH information of subscriber equipment (UE) configuration carrying, and described uplink and downlink CCTrCH information comprises: the TFCS and the physical channel parameters of the parameter of transmission channel that this CCTrCH comprises, correspondence.But because the TFCS of CCTrCH correspondence may comprise multiple transformat combination, therefore for the correct decoding of realizing data receives, receiving terminal must be known the TF of each transmission channel in current TTI by certain detection method.The process that above-mentioned receiving terminal detects each transmission channel TF just is called transport format detection.
Existing transport format detection method has a variety of, mainly comprises: based on the transport format detection of transformat combination sign (TFCI, Transport Format Combination Indicator), the total blindness detects and based on blind Detecting of guiding or the like.
Transport format detection based on TFCI is meant: transmitting terminal adds TFCI in the time slot format of the radio frames of carrying these CCTrCH data after CCTrCH is mapped to physical channel, indicate the TFC of each CCTrCH in current TTI by this TFCI to receiving terminal.Wherein, TFCI is the index value that TFCS concentrates each TFC, and is corresponding one by one with TFC.Like this, receiving terminal can at first extract the TFCI that carries in the radio frames when receiving data, find the TFC of this CCTrCH correspondence according to the TFCI that extracts, thereby obtain the TF of each transmission channel correspondence, respectively each transmission channel is being deciphered with these TF then, realize the reception of data.
Owing to whether comprise the TFCI bit in the time slot format of radio frames is the option that 3-G (Generation Three mobile communication system) is provided with, if therefore do not comprise TFCI in the time slot format of the radio frames of carrying CCTrCH data, then receiving terminal just need carry out transmission format blind detection.Described transmission format blind detection just is meant at transmitting terminal and does not send under the situation of TFCI that receiving terminal is according to the method for the Data Detection transformat of being accepted.The method that total blindness mentioned above detects and all belongs to transmission format blind detection based on the blind Detecting of guiding.Do not send at transmitting terminal under the situation of TFCI, receiving terminal will be deciphered and Cyclic Redundancy Check certain or certain several transmission channels respectively with all possible TF, be called for short the decoding verification, and judge the correctness of decoding according to the result of CRC check, finally find the correct TF of this transmission channel, thereby finish the reception of data.
Clearly, the amount of calculation that above-mentioned transmission format blind detection method implements unusual complexity and decoding and CRC check is very big, particularly ought be mapped on the CCTrCH the TFC that transmission channel is more or TFCS comprises more for a long time, above-mentioned transmission format blind detection process will expend a large amount of system resource.
At present, for complexity and the amount of calculation that reduces realization, proposed the blind checking method of a variety of relative simplification, but these methods all need transmission channel is increased the restrictive condition of many harshnesses in application.
For example, in the blind checking method based on guiding, this method needs at first to be set at pilot channel with one in the transmission channel.Use this method, in the blind detection process of transformat, receiving terminal only needs with different TF this pilot channel to be deciphered with CRC check to be attempted, find out the current TF of this pilot channel, just can be by the TF of this pilot channel, directly determine the TF of other transmission channels, reduced the complexity and the amount of calculation that realize widely.But, make in this way, must set up the relation between the TF of the TF of pilot channel and other transmission channels, therefore, need carry out following restriction to described pilot channel:
● pilot channel and detected transmission channel should the identical TTI of tool;
● the different TF that the different TF of detected transmission channel should corresponding pilot channel, just can directly determine the TF of tested transmission channel as long as promptly determined the TF of pilot channel;
● pilot channel must use explicit blind Detecting (Explicit Blind Detection) mode to carry out blind Detecting, promptly should carry out repeatedly the trial of channel decoding and CRC check to this pilot channel, finds out the correct a kind of transformat of most probable.
From above-mentioned based on the guiding blind checking method as can be seen, though this method has reduced the complexity and the amount of calculation that realize greatly, but, therefore also limited the range of application of above-mentioned transmission channel blind checking method greatly owing to need carry out harsh restriction to transmission channel.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method of transmission format blind detection, not only reduced the complexity of existing transmission format blind detection method and the amount of calculation of decoding verification, and do not needed transmission channel is carried out any restriction.
Transmission format blind detection method of the present invention comprises:
A, according to the transport format combination set that radio network controller has disposed, calculate the required number of physical channels when transmission of each transformat combination in this transport format combination set, and set up the corresponding relation of described transformat combination and number of physical channels;
B, when receiving data, detect the actual physical channel number that takies of current wireless frame;
C, number of physical channels and the actual physical channel number that takies of detected current wireless frame that all transformat combination in the transport format combination set are required compare, with required number of physical channels and the described actual identical transmission format composite set of number of physical channels that takies as the corresponding transformat combination Candidate Set of current wireless frame; If there is no required number of physical channels and the detected actual identical transformat combination of number of physical channels that takies are then with the set of the most approaching described actual transformat combination that takies number of physical channels of the required number of physical channels transformat combination Candidate Set as the current wireless frame;
D, radio frames is mapped as the coded combination transmission channel,, from described transformat combination Candidate Set, finds the transformat combination of present encoding combination of transmitted channel correspondence afterwards according to data carried by data information on this coded combination transmission channel.
Step a is described to be calculated as: adopt speed matching algorithm to calculate the required number of physical channels when transmission of each transformat combination in the described transport format combination set.
The actual physical channel number that takies of the described detection current wireless of step b frame is: adopt the code channel activating detection algorithm or repeatedly code channel activating combine detection algorithm detect the actual physical channel number that takies of described current wireless frame.
The judgment criterion of code channel activating detection algorithm of the present invention is: power ratio threshold algorithm or signal-noise ratio threshold algorithm.
Only comprise a transformat combination in the transformat combination Candidate Set of the present invention, then the described transformat combination of present encoding combination of transmitted channel correspondence that finds from described transformat combination Candidate Set of steps d is: with the transformat combination of this transformat combination as present encoding combination of transmitted channel correspondence;
Comprise a plurality of transformat combination in the described transformat combination Candidate Set, then the described transformat combination of present encoding combination of transmitted channel correspondence that finds from described transformat combination Candidate Set of steps d is: with the transformat combination in the transformat combination Candidate Set data carried by data information on the described coded combination transmission channel is deciphered verification successively, the transformat combination that check results is correct is as the transformat combination of present encoding combination of transmitted channel correspondence.
Comprise a plurality of transformat combination in the transformat combination Candidate Set of the present invention, then described method further comprised before steps d:
All transformat combination in this transformat combination Candidate Set are compared with the transformat combination of determining according to previous radio frames successively, sort according to the high more transformat combination prioritization condition of the priority many more, then transformat combination of the transmission channel with identical traffic form, order according to the priority again, with described transformat combination data carried by data on the described coded combination transmission channel is deciphered verification successively, up to finding the correct transformat combination of check results.
Of the present invention data carried by data on the described coded combination transmission channel decoding with transformat combination is verified as:
With each transformat in the described transformat combination data that receive on the corresponding transmission channel are deciphered and cyclic redundancy check (CRC) respectively.
Of the present inventionly further comprise when the data that receive on the corresponding transmission channel being deciphered verification with the transformat in the transformat combination:
For the transmission channel that adopts the different coding mode, transmission channel is sorted according to the highest transmission channel priority sort criteria of transmission channel priority that adopts convolution coding; For the transmission channel that adopts the same-code mode, the transmission channel priority sort criteria the highest according to the shortest transmission channel priority of code length sorts transmission channel; And then order according to the priority, successively to deciphering and cyclic redundancy check (CRC) through the transmission channel of ordering.
Transmission channel priority sort criteria of the present invention is:
For the transmission channel that adopts the different coding mode, adopt the transmission channel priority of convolution coding the highest;
For the transmission channel that adopts the same-code mode, the shortest transmission channel priority of code length is the highest.
The method of the invention further comprised before carrying out described steps d:
From the transmission channel that described coded combination transmission channel is comprised, select any one transmission channel to compare channel as transformat;
At this transformat relatively in the Transmission Time Interval of channel, the transformat combination that all transformat combination transformat combination Candidate Set corresponding with other radio frames that receive in this Transmission Time Interval that the transformat combination Candidate Set of current wireless frame correspondence is comprised comprised compares;
From the transformat combination Candidate Set of current wireless frame correspondence, remove the relatively not corresponding to transformat combination of transformat of channel of transformat.
This shows, the method of transmission format blind detection of the present invention is by setting up each transformat combination and number of physical channels purpose relation in the transport format combination set in advance, can be by detecting the actual number of physical channels that takies of current wireless frame when receiving the radio frames data carried by data, determine the Candidate Set of the transformat combination of current wireless frame correspondence, dwindle the scope of transformat combination to be detected greatly, thereby reduced the complexity of transmission format blind detection method and the amount of calculation of decoding verification.
In addition, because transmission format blind detection method of the present invention does not need transmission channel is carried out any restriction, therefore, this method has the bigger scope of application.
Description of drawings
Fig. 1 is the described transmission format blind detection method flow chart of preferential embodiment of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make invention is clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In order to reduce the complexity and the amount of calculation of existing transmission format blind detection method, method of the present invention is at first set up the corresponding relation between all transformat combination and physical channel number in the transport format combination set, and when receiving the radio frames data carried by data, determine to decipher the transformat combination Candidate Set of verification by detecting the actual number of physical channels that takies of current wireless frame, dwindled greatly and need decipher the quantity of the transformat combination of verification, thereby reduced the complexity of transmission format blind detection and the amount of calculation of decoding verification.
Embodiment 1:
Fig. 1 has shown the embodiment of the invention 1 described transmission format blind detection method flow process.As shown in Figure 1, in the described method of present embodiment, UE is as the receiving terminal of down link, and Node B independently carries out following each step separately as the receiving terminal of up link:
Step 11: according to the TFCS of RNC configuration, adopt speed matching algorithm to calculate the required number of physical channels when transmission of each TFC among the described TFCS, set up the corresponding relation of TFC and number of physical channels, and store.
From existing data transmission procedure as can be known, when setting up professional the connection, RNC can be respectively to the information of the Node of correspondence B and UE configuration uplink and downlink CCTrCH, and described uplink and downlink CCTrCH information comprises: the parameter of transmission channel that this CCTrCH comprises, the TFCS of this CCTrCH correspondence and physical channel parameters or the like.Node B and UE can be known all TFC that uplink and downlink CCTrCH may use according to the TFCS of RNC configuration.Because in the transmission course of data, the UE downlink data receiving, and Node B receives upstream data, therefore, UE only needs to calculate the required number of physical channels of each TFC among the TFCS of descending CCTrCH correspondence, and Node B only needs to calculate the required number of physical channels of each TFC among the TFCS of up CCTrCH correspondence.
In this step, calculating the required speed matching algorithm that number of physical channels adopted of each TFC can be the speed matching algorithm that uses in the prior art, for example: evenly punching or speed matching algorithm or the like such as evenly repeat.
To be that example describes said process in detail with descending 64k packet domain (PS) business below.When the CCTrCH that sets up this 64k PS business connected, RNC was as shown in table 1 to the transport channel parameters of the receiving terminal UE of down link configuration:
Table 1
As can be seen from Table 1, this combinations of services, promptly this CCTrCH comprises two transmission channels, and wherein the transmission channel 0 of bearer service comprises TF0～TF45 kind transformat, and its TTI is 20ms, adopts the Turbo code coding, and its transmission rate maximum is about 64k bps; And the transmission channel 1 of carrier signaling comprises two kinds of transformats of TF0, TF1, and its TTI is 40ms, adopts 1/3 convolution coding, and its transmission rate maximum is about 3.4k bps.
The TFCS of RNC configuration is as shown in table 2:
| The TFCS size | 10 |
| TFCS | (64kbps RAB，DCCH)＝(TF0，TF0)，(TF1，TF0)， (TF2，TF0)，(TF3，TF0)，(TF4，TF0)，(TF0，TF1)， (TF1，TF1)，(TF2，TF1)，(TF3，TF1)，(TF4，TF1) |
Table 2
In this step, adopt after each TFC among the TFCS carries out rate-matched shown in existing any one speed matching algorithm his-and-hers watches 2, the corresponding relation of required number of physical channels when UE will obtain each TFC and its transmission among this TFCS, as shown in table 3:
| TFC (transmission channel 0, transmission channel 1) | Required number of physical channels |
| (TF0，TF0) | 0 |
| (TF1，TF0) | 3 |
| (TF2，TF0) | 4 |
| (TF3，TF0) | 6 |
| (TF4，TF0) | 8 |
| (TF0，TF1) | 1 |
| (TF1，TF1) | 3 |
| (TF2，TF1) | 5 |
| (TF3，TF1) | 7 |
| (TF4，TF1) | 8 |
Table 3
Step 12: when receiving data, receiving terminal adopts the code channel activating detection algorithm to detect the actual physical channel number that takies of current wireless frame in the physical channel that receives.
Because after CCTrCH is mapped to physical channel, the data on this channel will be carried on the radio frames of transmitting on the wave point of Node B and UE, therefore, in this step, receiving terminal will be that unit carries out the detection of physical channel number with the radio frames.Usually, the length of described radio frames is 10ms, is generally less than the TTI of transmission channel.Described here receiving terminal is the common name of Node B and UE, and wherein, receiving terminal is Node B for up link, and receiving terminal is UE for down link.
The detection criteria of the described code channel activating detection algorithm of this step can adopt power ratio threshold algorithm, signal-noise ratio threshold algorithm or the like.Simultaneously, in order to guarantee to detect performance, the code channel activating detection algorithm that this step is used can adopt code channel activating is repeatedly detected the algorithm that combines.
Step 13: take the physical channel number and, search satisfactory TFC according to detected current wireless frame is actual, set up the TFC Candidate Set of current wireless frame correspondence at the TFC of step 11 foundation and the corresponding relation of number of physical channels.
This step is described searches satisfactory TFC and is specially:
According to the TFC of step 11 foundation and the corresponding relation of physical channel, number of physical channels that all TFC among the TFCS are required and the detected actual number of physical channels that takies compare, and all required number of physical channels are gathered as the corresponding TFC Candidate Set of current wireless frame with the detected actual identical TFC of number of physical channels that takies;
If there is no required number of physical channels and the detected actual identical TFC of number of physical channels that takies are then with the most approaching described actual TFC Candidate Set that takies the TFC set of number of physical channels as current wireless frame correspondence of required number of physical channels.
TFC in this TFC Candidate Set will be used for the data that receive are deciphered and CRC check at subsequent step, therefrom to find the TFC of current C CTrCH correspondence.
For example, in conjunction with the example of the described 64k PS of preamble business, be 5 if UE detects the actual number of physical channels that takies, the corresponding relation of TFC and required number of physical channels shown in the associative list 3 then, determine described TFC Candidate Set be required number of physical channels be 5 (TF2, TF1); If it is 8 that UE detects the actual number of physical channels that takies, then determine described TFC Candidate Set be required number of physical channels be 8 (TF4, TF0) and (TF4, TF1); If it is 2 that UE detects the actual number of physical channels that takies, from the corresponding relation shown in the table 3 as can be seen, without any a required number of physical channels of TFC is 2, then UE is 1 or 3 TFC with required number of physical channels, i.e. (TF0, TF1), (TF1, TF0) and (TF1 is TF1) as the Candidate Set of described TFC.
Step 14: the radio frames that is received is mapped to CCTrCH, goes up data carried by data information according to CCTrCH afterwards, from the TFC Candidate Set, find out the TFC corresponding with current C CTrCH.
This step is described to find the TFC corresponding with current C CTrCH to be specially from the TFC Candidate Set:
Step 141: judge the TFC number that comprises in the described TFC Candidate Set, if having only a TFC, then execution in step 142; If comprise a plurality of TFC, then execution in step 143;
Step 142: determine that this TFC is the TFC of described CCTrCH correspondence, receiving terminal can directly be deciphered and CRC check the data that receive with this TFC subsequently, realizes the reception of data, finishes then; If this moment, the CRC check erroneous results was then judged to receive error code, finish then;
Step 143: with each TFC in the TFC Candidate Set data that are mapped on the described CCTrCH are deciphered and CRC check successively, promptly respectively corresponding transmission channel is deciphered and CRC check, and judge the CRC check result with the TF that each TFC comprised;
If find the correct TFC of CRC check result, judge that then this TFC is the TFC of described CCTrCH correspondence; At this moment, receiving terminal need not can directly to realize the reception of data with this TFC to not deciphering and the TFC of CRC check deciphers verification again;
If travel through whole TFC Candidate Set, do not find the correct CRC of CRC check result, then judge to receive error code.
From the process of above-mentioned transmission format blind detection as can be seen, the described method of present embodiment is by setting up the corresponding relation between each TFC and physical channel number among the TFCS at receiving terminal in advance, when receiving according to actual detected to physical channel take number, TFC among the TFCS is screened, and set up the TFC Candidate Set of current wireless frame correspondence, dwindle the TFC scope that to decipher verification greatly, thereby reduced the complexity of transmission format blind detection method and the amount of calculation of decoding verification.In addition, this method does not limit transmission channel yet.
Embodiment 2:
For complexity that further reduces embodiment 1 described transport format detection process and the amount of calculation of deciphering verification, the step 14 of 2 pairs of the foregoing descriptions of embodiments of the invention is improved, and other steps are all identical with embodiment 1.
Because the described prioritization principle of present embodiment has taken into full account the characteristics of 3-G (Generation Three mobile communication system) combinations of services, therefore, the TFC that priority is high more may be the TFC of described CCTrCH correspondence, like this, preferentially the data that receive are deciphered and CRC check with the high TFC of priority, usually can find the TFC of described CCTrCH correspondence more apace, further reduce the complexity and the amount of calculation of transmission format blind detection.
The described TFC prioritization of present embodiment condition is specially: TFC and the TFC that determines according to previous radio frames are compared, and the transmission channel with identical TF is many more, and then the priority of this TFC is high more.
For example, if the TFC of the described CCTrCH correspondence of determining according to previous radio frames be (TF4, TF1), and the TFC Candidate Set of current wireless frame correspondence be (TF4, TF1) and (TF4, TF0), then because (TF4 TF1) with identical by the definite TFC of last radio frames, comprises two transmission channels with identical TF, and (TF4, TF0) only contain a transmission channel with identical TF, therefore, (TF4, TF1) priority will be higher than (TF4, priority TF0).Receiving terminal can use preferentially that (TF4 TF1) deciphers and CRC check the data that receive.
Embodiment 3:
Regulation according to 3-G (Generation Three mobile communication system), for same transmission channel, TF a TTI inside remains unchanged, and generally, because detection unit's radio frames length of transmission format blind detection is less than the TTI of transmission channel, therefore, corresponding certain the transmission channel TF of TFC that determines according to current radio frames should be with identical to other TF in should the same TTI of transmission channel.
For example, transport channel parameters according to the RNC configuration, as shown in table 1, the TTI of known transmission channel 0 is 20ms, the TTI of transmission channel 1 is 40ms, and the length of radio frames is generally 10ms, therefore, each TTI of corresponding transmission channel 0 should determine two TFC, and each TTI of corresponding transmission channel 1 should determine 4 TFC.Suppose that current radio frames to be detected is second radio frames in transmission channel 1 certain TTI, and the TFC Candidate Set of determining according to current radio frames is (TF4, TF1) reach (TF4, TF0), if known transformat according to the definite transmission channel 1 of last radio frames is TF0, then can determine also to should be TF0 according to the transformat of the definite transmission channel 1 of current wireless frame, therefore, the TFC that can directly determine the current correspondence of described CCTrCH is (TF4, TF0), need not to decipher verification respectively with these two TFC.
This shows, when being applied to above-mentioned condition in the transport format detection method of the present invention, receiving terminal can be gone up same transmission channel other TFC Candidate Sets in same TTI according to CCTrCH, and the identical condition of transformat in the same Transmission Time Interval of same transmission channel, remove the TFC that transformat can not be consistent, thereby further dwindle the scope of the TFC that need decipher verification, and then reduce the complexity and the amount of calculation of transport format detection.
Present embodiment improves embodiment 1 or embodiment 2 described methods, present embodiment is all identical with step 11～step 13 of embodiment 1 or embodiment 2, and after determining current TFC Candidate Set according to the current wireless frame, promptly in step 14, be not that verification is directly deciphered to the TFC in the detected TFC Candidate Set by unit with the radio frames, but at first from the transmission channel that described CCTrCH comprised, select any one transmission channel as transformat channel relatively, and be that unit deciphers with CRC check the TFC in the TFC Candidate Set of this CCTrCH and handles with the TTI of selected transmission channel.Concrete grammar is: in described transformat compares a Transmission Time Interval of channel, the transformat combination that all transformat combination transformat combination Candidate Set corresponding with other radio frames that receive in this Transmission Time Interval that the transformat combination Candidate Set of current wireless frame correspondence is comprised comprised compares, and removes the relatively not corresponding to transformat combination of transformat of channel of transformat from the transformat combination Candidate Set of current wireless frame correspondence.
Be the transmission format blind detection method that example illustrates this embodiment still below with previously described 64k PS business.Supposing that the current wireless frame is first radio frames in transmission channel 0 certain TTI, also is first radio frames in transmission channel 1 certain TTI, and hypothesis step 13 according to this radio frames determine the TFC Candidate Set for (TF4, TF0) and (TF4, TF1).Select transmission channel 1 as described transformat channel relatively below, and be that unit carries out transmission format blind detection with the TTI 40ms of transmission channel 1.Because general radio frames length is 10ms, so, can receive four radio frames in the TTI unit of each 40ms; Again because the TTI of transmission channel 0 is 20ms, minimum TTI for transmission channel that this CCTrCH comprises, known CCTrCH corresponding TFC in it comprises the minimum TTI of transmission channel should remain unchanged, therefore, in four radio frames that in every 40ms TTI unit, received, first and second radio frames should corresponding identical TFC, and third and fourth radio frames also should corresponding identical TFC.Following two kinds of ways are arranged in this case:
First kind: the TFC that comprises with this TFC Candidate Set deciphers and CRC check the signal that receives, determine the TFC of current C CTrCH correspondence, for example: TFC is that (TF4 is in the time of TF1), the transformat that just can know current transmission channel 0 is TF4, and the transformat of transmission channel 1 is TF1.In this case, when receiving second follow-up radio frames, can determine directly that the TFC of current C CTrCH correspondence is (TF4, TF1).
Because the TFC of first radio frames and second radio frames should be identical, therefore decipher checking procedure and also can after receiving second radio frames, carry out.
Continue to receive the 3rd, the 4th radio frames then, the transformat that can directly determine the corresponding transmission channel 1 that comprises among the TFC of current C CTrCH correspondence is TF1, thereby all TFC that can not be TF1 with the transformat of transmission channel 1 in the TFC Candidate Set of these two radio frames correspondences remove from the TFC Candidate Set of above-mentioned the 3rd, the 4th radio frames correspondence, for example from the TFC Candidate Set, remove all (*, TF0), wherein * represents TF arbitrarily.Can further reduce the number of TFC in the TFC Candidate Set of above-mentioned the 3rd, the 4th radio frames correspondence like this.At this moment, if only comprise a TFC in the TFC Candidate Set of the 3rd, the 4th radio frames correspondence, can determine directly that then this TFC is the TFC of these two radio frames correspondences, and need not to decipher verification; If still comprise a plurality of TFC, the TFC that then still needs the TFC Candidate Set to above-mentioned first, second radio frames correspondence to be comprised deciphers verification, thereby finds the TFC of the current correspondence of described CCTrCH.
Second kind: current TFC Candidate Set is stored, continue to receive second radio frames, and TFC Candidate Set that will be definite according to second radio frames, (TF4 for example, TF0) reach (TF4, TF1), also store, the TFC Candidate Set that known this TFC Candidate Set should be corresponding with first radio frames is identical.
Continue to receive the 3rd radio frames, obtain the TFC Candidate Set of determining according to the 3rd radio frames.The transformat of transmission channel 1 compares in the TFC Candidate Set that this TFC Candidate Set is corresponding with first, second radio frames, and removes the inconsistent TFC of transmission channel 1 transformat in the TFC Candidate Set corresponding with the 3rd radio frames from the TFC Candidate Set of described first, second radio frames correspondence.At this moment, if only comprise a TFC in the TFC Candidate Set of first, second radio frames correspondence, can determine directly that then this TFC is the TFC of these two radio frames correspondences, and need not to decipher verification; If still comprise a plurality of TFC, then still need the TFC that comprises in the TFC Candidate Set to above-mentioned first, second radio frames correspondence to decipher verification, thereby find the TFC of the current correspondence of described CCTrCH.
Because the TFC of the 3rd radio frames and the 4th radio frames correspondence should be identical, the therefore above-mentioned relatively process of TFC also can be carried out after receiving the 4th radio frames.
For example, in above-mentioned example, if the TFC Candidate Set that obtains according to the 3rd radio frames is (TF3, TF1), then through comparing, in order to guarantee the transformat unanimity of transmission channel 1, the transformat that can remove transmission channel 1 from the TFC Candidate Set of first, second radio frames is not the TFC of TF1, promptly (TF4, TF0).The TFC that can determine first, second two radio frames correspondences thus for (TF4, TF1).
From said process as can be seen, Application Example 3 described methods may not need to decipher the TFC that verification just can be found described CCTrCH correspondence with any TFC, thereby can further simplify calculating.
After having determined the TFC Candidate Set through above-mentioned steps, if this TFC Candidate Set still comprises a plurality of TFC, present embodiment 2 described methods in conjunction with the embodiments then, according to the TFC prioritization principle that embodiment 2 provides the TFC in the Candidate Set is carried out prioritization, decipher and CRC check with the TFC in the TFC Candidate Set successively according to the height of priority.
But, under certain special situation, may appear in the TTI of minimum of the transmission channel that described CCTrCH comprises, the different error situation of the detected physical channel number in front and back, this mistake, to cause the embodiment 3 described methods can't operate as normal, in order to address this problem, present embodiment is ad hoc fixed, if twice detected number of physical channels difference in the minimum TTI of transmission channel then preferentially detects number of physical channels with the back and is as the criterion and determines that the TFC Candidate Set to should TTI is as the criterion.
For example, suppose that the current wireless frame is second radio frames in transmission channel 0 certain TTI, detected number of physical channels is 8 on this radio frames, and detected number of physical channels is 7 on previous radio frames, the TF situation inequality of same transmission channel in a TTI occurred.In this case, according to the described method of present embodiment preferentially to be as the criterion second detected number of physical channels 8 of radio frames, determine in this TTI the TFC Candidate Set for (TF4, TF0) and (TF4, TF1).
Embodiment 4:
In the method for the foregoing description 1～embodiment 3 described transmission format blind detection, if can't directly determine the TFC of current C CTrCH, just need decipher verification to this CCTrCH data carried by data respectively successively with the TFC in the Candidate Set, promptly just corresponding each TFC, with the transformat that comprises among this TFC corresponding transmission channel is deciphered verification respectively, have only the TFC that the correct TFC of the decoding check results of all corresponding transmission channels is only current this CCTrCH correspondence.
Therefore, in order further to reduce the amount of calculation and the complexity of transmission format blind detection, the described method of present embodiment has been done further improvement to the step 14 of the foregoing description 1 to 3, when receiving terminal is deciphered the data that receive with the TFC in the TFC Candidate Set and during CRC check, receiving terminal further carries out prioritization according to predefined transmission channel priority sort criteria with the transmission channel that CCTrCH comprised successively.With each TFC to CCTrCH on data carried by data decipher in the process of verification, earlier higher and transmission channel that have a CRC check deciphers and CRC check is handled to priority, if CRC check is correct, then the lower transmission channel of priority is deciphered and the CRC check processing; If the CRC check mistake can determine directly that then this TFC is not the TFC of described CCTrCH correspondence, therefore can then handle next TFC.
Described here transmission channel priority sort criteria is:
A, for the transmission channel that adopts the different coding mode, adopt the transmission channel priority of convolutional encoding the highest;
B, for the transmission channel that adopts the same-code mode, the shortest transmission channel priority of code length is the highest.
For example, for two transmission channels shown in the table 1, because transmission channel 1 employing is convolution coding, therefore, the priority of transmission channel 1 is higher than the priority of transmission channel 0.With TFC the data that receive are being deciphered and during CRC check, can at first decipher and CRC check the data on the transmission channel 1 with the transformat of transmission channel 1 correspondence among this TFC, if check results is correct, with the transformat of transmission channel 0 correspondence the data on the transmission channel 0 are deciphered and CRC check again.
This shows, the blind checking method of above-mentioned transformat is by setting up the relation between TFC and the physical channel number, make full use of the characteristics of transmission channel form self simultaneously, can significantly reduce the TFC number that the TFC Candidate Set comprises, make the significantly reduction that the amount of calculation of decoding in the transmission format blind detection process and CRC check obtains, and need not transmission channel is increased any restriction.
Claims (9)
1. a transmission format blind detection method is characterized in that, described method comprises:
A, according to the transport format combination set that radio network controller has disposed, calculate the required number of physical channels when transmission of each transformat combination in this transport format combination set, and set up the corresponding relation of described transformat combination and number of physical channels;
B, when receiving data, detect the actual physical channel number that takies of current wireless frame;
C, number of physical channels and the actual physical channel number that takies of detected current wireless frame that all transformat combination in the transport format combination set are required compare, with required number of physical channels and the described actual identical transmission format composite set of number of physical channels that takies as the corresponding transformat combination Candidate Set of current wireless frame; If there is no required number of physical channels and the detected actual identical transformat combination of number of physical channels that takies are then with the set of the most approaching described actual transformat combination that takies number of physical channels of the required number of physical channels transformat combination Candidate Set as the current wireless frame;
D, radio frames is mapped as the coded combination transmission channel,, from described transformat combination Candidate Set, finds the transformat combination of present encoding combination of transmitted channel correspondence afterwards according to data carried by data information on this coded combination transmission channel.
2. the method for claim 1 is characterized in that, step a is described to be calculated as: adopt speed matching algorithm to calculate the required number of physical channels when transmission of each transformat combination in the described transport format combination set.
3. the method for claim 1, it is characterized in that the actual physical channel number that takies of the described detection current wireless of step b frame is: adopt the code channel activating detection algorithm or repeatedly code channel activating combine detection algorithm detect the actual physical channel number that takies of described current wireless frame.
4. method as claimed in claim 3 is characterized in that, the judgment criterion of described code channel activating detection algorithm is: power ratio threshold algorithm or signal-noise ratio threshold algorithm.
5. the method for claim 1 is characterized in that,
Only comprise a transformat combination in the described transformat combination Candidate Set, then the described transformat combination of present encoding combination of transmitted channel correspondence that finds from described transformat combination Candidate Set of steps d is: with the transformat combination of this transformat combination as present encoding combination of transmitted channel correspondence;
Comprise a plurality of transformat combination in the described transformat combination Candidate Set, then the described transformat combination of present encoding combination of transmitted channel correspondence that finds from described transformat combination Candidate Set of steps d is: with the transformat combination in the transformat combination Candidate Set data carried by data information on the described coded combination transmission channel is deciphered verification successively, the transformat combination that check results is correct is as the transformat combination of present encoding combination of transmitted channel correspondence.
6. method as claimed in claim 5 is characterized in that, comprises a plurality of transformat combination in the described transformat combination Candidate Set, and then described method further comprised before steps d:
All transformat combination in this transformat combination Candidate Set are compared with the transformat combination of determining according to previous radio frames successively, sort according to the high more transformat combination prioritization condition of the priority many more, then transformat combination of the transmission channel with identical traffic form, order according to the priority again, with described transformat combination data carried by data on the described coded combination transmission channel is deciphered verification successively, up to finding the correct transformat combination of check results.
7. as claim 5 or 6 described methods, it is characterized in that described data carried by data on the described coded combination transmission channel decoding with transformat combination is verified as: with each transformat in the described transformat combination data that receive on the corresponding transmission channel are deciphered and cyclic redundancy check (CRC) respectively.
8. method as claimed in claim 7 is characterized in that, describedly further comprises when with the transformat in the transformat combination data that receive on the corresponding transmission channel being deciphered verification:
For the transmission channel that adopts the different coding mode, transmission channel is sorted according to the highest transmission channel priority sort criteria of transmission channel priority that adopts convolution coding;
For the transmission channel that adopts the same-code mode, the transmission channel priority sort criteria the highest according to the shortest transmission channel priority of code length sorts transmission channel;
And then order according to the priority, successively to deciphering and cyclic redundancy check (CRC) through the transmission channel of ordering.
9. as claim 1,5 or 6 described methods, it is characterized in that, before carrying out described steps d, further comprise:
From the transmission channel that described coded combination transmission channel is comprised, select any one transmission channel to compare channel as transformat;
At this transformat relatively in the Transmission Time Interval of channel, the transformat combination that all transformat combination transformat combination Candidate Set corresponding with other radio frames that receive in this Transmission Time Interval that the transformat combination Candidate Set of current wireless frame correspondence is comprised comprised compares;
From the transformat combination Candidate Set of current wireless frame correspondence, remove the relatively not corresponding to transformat combination of transformat of channel of transformat.
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| CN101389106B (en) * | 2007-09-11 | 2012-11-14 | 中兴通讯股份有限公司 | Control channel resource allocation and blind detection method |
| JP5069160B2 (en) * | 2008-03-26 | 2012-11-07 | 株式会社エヌ・ティ・ティ・ドコモ | Base station apparatus, user apparatus and method in mobile communication system |
| CN101610574B (en) * | 2008-06-16 | 2011-08-17 | 展讯通信（上海）有限公司 | Receiving/sending method and receiving/sending equipment in time division-synchronous code division multiple access system |
| CN101615973B (en) * | 2008-06-23 | 2013-01-02 | 华为技术有限公司 | Data transmission method, device, user equipment and communication system |
| CN101841494B (en) * | 2009-03-17 | 2012-12-12 | 上海摩波彼克半导体有限公司 | Method for realizing blind transport format detection on downlink RLC layer of wireless communication system |
| CN108123777A (en) * | 2016-11-30 | 2018-06-05 | 华为技术有限公司 | A kind of coding mode determines method and device |
| JP7221866B2 (en) | 2016-12-14 | 2023-02-14 | オッポ広東移動通信有限公司 | Transmission method and device |
| CN110602784B (en) * | 2018-06-12 | 2023-05-09 | 中国移动通信有限公司研究院 | Uplink and downlink configuration method, base station and terminal |
| CN111600695B (en) * | 2020-07-24 | 2020-10-27 | 武汉欧浦迪光子科技有限公司 | Information transmission device and method |
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