CN100415036C - Detecting method for upward intensified special channels - Google Patents
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- CN100415036C CN100415036C CNB2004100780103A CN200410078010A CN100415036C CN 100415036 C CN100415036 C CN 100415036C CN B2004100780103 A CNB2004100780103 A CN B2004100780103A CN 200410078010 A CN200410078010 A CN 200410078010A CN 100415036 C CN100415036 C CN 100415036C
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Abstract
The present invention discloses a detection method of an uplink enhanced special channel (E-DCH). When terminal equipment transmits information to carry out channel coding, error detecting codes are not added, and prefix feature codes are transmitted before the information is transmitted. The method also comprises the steps: a. NodeB judges whether information on the uplink E-DCH begins to be transmitted according to whether the prefix feature codes are received, and if the information on the uplink E-DCH begins to be transmitted, the step b is carried out; or else the current information is refused to be received, and the step a continues to be carried out; b. the current information is received, whether the transmission of the information on the uplink E-DCH is ended is judged, and if transmission of the information on the uplink E-DCH is ended, the current information is refused to be received, the step a is carried out; or else the step b continues to be carried out. The present invention also provides a detection method of the uplink E-DCH, and the application of the method of the present invention can reduce the decoding resource of the NodeB, and enhance the information reception efficiency of the integral uplink E-DCH.
Description
Technical field
The present invention relates to the Channel Detection technology in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, particularly the detection method of ascending reinforced special channel (E-DCH) in the WCDMA system.
Background technology
At present, along with the development of mobile communication system and the growth of mobile phone user's quantity, existing 1G and 2G communication system can not adapt to Virtual network operator and user's demand.In addition, simple speech business also can not have been satisfied the needs of people to information interchange, people wish to obtain the multimedia service information such as data, video and image except that voice whenever and wherever possible, these all require to seek the higher technology of the availability of frequency spectrum, seek the bigger mobile communication system of message capacity, the 3G mobile communication system is arisen at the historic moment thus.
WCDMA is as one of 3G standard of the three kinds of main flows in the world, and himself system is among the continuous perfecting process.In the Release5 version, WCDMA has introduced high speed downlink packet access technology (HSDPA), and becomes a most important characteristic of Release5 version.The HSDPA technology make the descending handling capacity of WCDMA reached before 2 to 3 times of version, can carry various Packet Services effectively.
Corresponding with it, high speed uplink packet inserts (HSUPA) technology and is among the standard discussion.The core objective of HSUPA technology is by using some up technique for enhancing, improving the throughput of ascending packet data.According to simulation result, the throughput that the HSUPA technology can make the WCDMA up channel improves 50% to 70% on the basis of version before.
The HSUPA technology mainly contains following feature: 1, NodeB realizes scheduling: before adopting the HSUPA technology, the uplink scheduling function of WCDMA network side realizes at radio network controller (RNC), in the HSUPA technology scheduling feature is transferred to NodeB, NodeB is when dispatching, can use the load information of sub-district more accurate and in real time, utilize the ascending idle port resource more fully, thereby make cell throughout bigger.2, mix re-transmission (HARQ) automatically: before adopting the HSUPA technology, the re-transmission of upstream data need be carried out at radio link control (RLC) layer of RNC, in the HSUPA technology functions of retransmission is transferred to NodeB, shortened and retransmitted the required time, simultaneously, the incremental redundancy decoding technique that uses among the HARQ makes NodeB in decoding, can make full use of the energy of each transmission data, improve the performance of eating dishes without rice or wine.3, support the short frame of 2ms Transmission Time Interval (TTI): before adopting the HSUPA technology, up TTI shortest length is 10ms, has introduced the short frame of 2msTTI among the HSUPA, has reduced professional time-delay, improves power system capacity simultaneously.
In order to support above technology, need transmit new business information and control information up, the up E-DCH of these informational needs carries, wherein, up E-DCH is divided into: special physical data channel for upload enhance (E-DPDCH) and up enhancing Dedicated Physical Control Channel (E-DPCCH), business information is carried by up E-DPDCH, and control information is carried by up E-DPCCH.
Different with other special uplink channel, the information of up E-DCH is discontinuous transmission, but terminal equipment initiatively initiates where necessary, so NodeB can't predict its delivery time, and up in addition E-DCH goes up loaded service also is discontinuous.Like this, NodeB need continue to detect the signal on the up E-DCH.
In the existing technology, add error detection code and assist NodeB to detect when E-DCH encodes, described error detection code adopts the Cyclic Redundancy Check sign indicating number usually.When adopting this mode to detect, NodeB need can discern error detection code and carries out verification through decoding, thinks data to be received proceed-to-send signal on the channel after verification is correct, thinking after verification makes mistakes does not have the signal transmission on the channel, the rejection current data.Because when E-DCH encodes, in each E-DCH unit (Unit), added error detection code, therefore, all will decipher and the error detection code verification when NodeB receives each E-DCH Unit, like this, taken a large amount of decode resources of system, and when E-DCH encodes, if use is the CRC sign indicating number, the CRC sign indicating number that then will add 8 at least, if each E-DCH Unit has added the CRC sign indicating number more than 8 or 8, will take a large amount of interface-free resources, influence the efficient of whole transfer of data.
False alarm rate when adopting the CRC sign indicating number to detect below in conjunction with table 1 pair and signaling consumption situation be comparative descriptions in addition.Set this moment: the maximum 10bit of " NodeB schedule information " significant bit number of the last carrying of E-DPCCH, the maximum 12bit of " HARQ information " significant bit number.False alarm rate and signaling consumption situation when transmitting different significant bit numbers, employing different length CRC sign indicating number have been described in the table 1.
Table 1
By table 1 as seen, when the significant bit that adopts 8 CRC sign indicating numbers and 12bit was counted, signaling consumption was minimum: 40%, but its false alarm rate is up to 0.39%.If desired false alarm rate is reduced and will use 12,16 even the CRC sign indicating number of multidigit more, still, as table 1 as seen, this will improve signaling consumption greatly.Because there is the terminal equipment of up E-DCH in each, its CRC part all can be brought so big signaling consumption, thereby on the whole interface-free resources has been caused more serious waste.For NodeB, need to continue E-DCH Unit is deciphered, could judge according to the CRC result after the decoding whether information is arranged on the up E-DCH, the decode resources that this just need take NodeB has increased the computing expense.
In sum, in the existing HSUPA technology, the up E-DCH information testing mechanism of NodeB can not effectively utilize system's limited empty resource, and brings overweight decoding burden to NodeB, is unfavorable for the performance of HSUPA technical advantage.
Summary of the invention
In view of this, main purpose of the present invention is to provide the detection method of a kind of up E-DCH, can save interface-free resources, reduces the decoding of NodeB and handles burden, improves the message pick-up efficient of whole up E-DCH.
Another object of the present invention is to provide the detection method of a kind of up E-DCH, can improve utilization rate of air interface resource, make full use of the decode resources of NodeB, reduce the false alarm rate that up E-DCH information detects.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses the detection method of a kind of up E-DCH, terminal equipment transmission information does not add when carrying out chnnel coding and is used for the error detection code that auxiliary NodeB detects, and sends the prefix condition code before transmission information; This method also comprises step:
Whether the a.NodeB basis receives described prefix condition code is judged that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
This method also comprises: terminal equipment sends the suffix condition code after sending information; Among the step b, the described method of judging whether the last information of up E-DCH sends end is: whether according to the information that receives is that described suffix condition code is judged.
Among the step b, describedly judge that up E-DCH goes up the method whether information send end and is: confidence level and preset reliable degree thresholding according to current information decoding judge whether current information is effective, if effectively, and then end of information transmission; If invalid, then information sends and finishes.
Wherein, up E-DPCCH and up E-DPDCH adopt time-multiplexed channel architecture, and the information that described terminal equipment sends is: the information of up E-DPCCH or the information of up E-DPDCH or up E-DPCCH and the time-multiplexed information of E-DPDCH.
Wherein, up E-DPCCH and up E-DPDCH adopt the channel architecture of code division multiplexing, and the information that described terminal equipment sends is: the information of up E-DPCCH; Simultaneously, the up E-DPCCH information that NodeB receives by reading detects the information of up E-DPCCH.
The invention also discloses the detection method of a kind of up E-DCH, terminal equipment transmission information does not add when carrying out chnnel coding and is used for the error detection code that auxiliary NodeB detects, and sends the suffix condition code after transmission information; This method also comprises step:
A.NodeB judges that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that according to whether receiving described suffix condition code up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
Among the step a, the described method of judging whether the last information of up E-DCH begins to send is: confidence level and preset reliable degree thresholding according to current information decoding judge whether current information is effective, if effectively, then information begins to send; If invalid, then information does not begin to send.
Wherein, up E-DPCCH and up E-DPDCH adopt time-multiplexed channel architecture, and the information that described terminal equipment sends is: the information of up E-DPCCH or the information of up E-DPDCH or up E-DPCCH and the time-multiplexed information of E-DPDCH.
Wherein, up E-DPCCH and up E-DPDCH adopt the channel architecture of code division multiplexing, and the information that described terminal equipment sends is: the information of up E-DPCCH; Simultaneously, the up E-DPCCH information that NodeB receives by reading detects the information of up E-DPCCH.
By such scheme as can be seen, key of the present invention is: terminal equipment transmission information does not add error detection code when carrying out chnnel coding, before information begins to send or after sending end, send the front/rear condition code of sewing, whether NodeB is that the described front/rear condition code of sewing judges whether information begins to send or send end according to the signal that receives, and after information begins to send, in the information of reception, judge whether information sends end, then after information sends end, rejection information, and whether the information that rejudges begins to send.
Therefore, the detection method of up E-DCH provided by the present invention can effectively be utilized interface-free resources, alleviates the decoding burden of NodeB, reduces the false alarm rate that detection information sends situation, thereby improves information transmission quality and the efficient of up E-DCH on the whole.
Description of drawings
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram;
Fig. 2 is for using the inventive method and adopting the information of the up E-DCH of time-multiplexed channel architecture to send schematic diagram;
Fig. 3 is for using the inventive method and adopting the information of the up E-DCH of channel architecture of code division multiplexing to send schematic diagram.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention discloses the detection method of a kind of up E-DCH, terminal equipment transmission information does not add error detection code when carrying out chnnel coding, and sends the prefix condition code before transmission information; This method also comprises step:
Whether the a.NodeB basis receives described prefix condition code is judged that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
Wherein, describedly judge whether information begins to send and method that whether information sends end has three kinds substantially: one, whether receive the front/rear condition code of sewing and judge by identification; Two, judge according to the confidence level of current decoding; Three, the error detection code that obtains according to decoding is judged.To adopt above-mentioned first method to judge whether information begins to send and whether information sends and end up being example, the inventive method is described in detail below in conjunction with Fig. 1.
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram, specifically comprises the steps:
Step 101:NodeB continue to detect the signal on the up E-DCH, execution in step 102 when having detected signal and send over.
Step 102: according to the signal that current detection arrives, judge whether to receive the prefix condition code, if, execution in step 103; Otherwise return step 101.
In the present embodiment, NodeB recognizes when sending the prefix condition code on the up E-DCH, adjudicates up E-DCH and goes up information and begin to send, and when recognizing the suffix condition code of sending on the up E-DCH, and the information on the up E-DCH of adjudicating sends and finishes.Before up E-DCH transmission information, in terminal equipment and NodeB, dispose the front/rear feature code sequence of sewing in advance, when terminal equipment sends information, before the information that is sent, add the prefix feature code sequence, and after the information that is sent, add the suffix feature code sequence, whether NodeB receives the front/rear condition code of sewing by carrying out related operation identification to the received signal, thereby judges.
Described identification is front/rear sew condition code related operation can for: according to the noise energy of the pre-configured spreading factor of system, feature code sequence, multipath number and each symbol of in signal interference ratio (SIR) estimation procedure of E-DPCCH, obtaining, obtain the signal energy of this feature code sequence after spread spectrum, scrambling, multipath are handled, obtain signal to noise ratio according to this signal energy and noise energy again, judge whether the current signal that detects is the front/rear condition code of sewing thereby whether exceed the front/rear condition code detection threshold of sewing that sets in advance by this signal to noise ratio relatively.Here, the front/rear related operation method of sewing condition code of described identification has multiple, belongs to known technology, is not described in detail in this.
Step 103: receive current E-DCH Unit.
Wherein, when terminal equipment sends information, need carry out convolutional encoding, and will send through information encoded composition E-DCH Unit to information.In the present embodiment, before sending E-DCH Unit, at first send the prefix feature code sequence, after sending this E-DCH Unit, add the suffix feature code sequence.If terminal equipment needs to send continuously a plurality of E-DCH Unit, then before sending first E-DCH Unit, send the prefix condition code, after sending last E-DCH Unit, send the suffix condition code.
Step 104: judge whether to receive the suffix condition code, if return step 101; Otherwise return step 103.
Wherein, NodeB continues to detect the follow-up signal of sending, and method described in 102 judges whether this signal is the suffix condition code set by step.If receive the suffix condition code, illustrate that current information has sent end, then NodeB need begin to detect the last information of up E-DCH and whether begin transmission, execution in step 101; If what receive is not the suffix condition code, illustrate that terminal equipment sends a plurality of E-DCHUnit continuously, the E-DCH Unit that the current signal that receives is follow-up transmission should give reception, and then execution in step 103.
Because, problem involved in the present invention goes up the method that information sends for detecting up E-DCH, whether the information of being sent is correctly irrelevant with detecting, therefore, here the message transmission among the E-DCHUnit that sends of setting terminal equipment is correct, if what receive is not the suffix condition code, then do not consider the situation of message transmission mistake.
In the above-mentioned steps 104, also can adopt described second or the third method detect information and whether send end.If the employing second method, then in the step 104, NodeB deciphers the confidence level that obtains deciphering to current information, then this confidence level and preset reliable degree thresholding are compared, if with a low credibility then current information is invalid in this confidence level thresholding, show that information sends end; Otherwise current information is effective, shows that information sends, and should give reception.If adopt the third method, terminal equipment adds error detection codes such as CRC sign indicating number when the information that sends is carried out chnnel coding, then in the step 104, NodeB deciphers current information and obtains error detection code, and carry out verification according to this error detection code and calculate, judge whether current information is correct, if information is correct, show that then information sends, should give reception; Otherwise show that information sends end.Here, describedly obtain deciphering confidence level and obtain error detection code carrying out the processing method that verification calculates and belonging to prior art, be not described further at this.
The present invention also provides the detection method of another kind of up E-DCH, does not add error detection code when transmission information is carried out chnnel coding, and sends described suffix condition code after transmission information; This method mainly comprises step:
A.NodeB judges that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that according to whether receiving described suffix condition code up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
When using this method and detecting, treatment step and above-mentioned shown in Figure 1 basic identical, key is to use in described step 104 described first method to judge whether information sends end, in described step 102, can use described first and second or three kinds of methods to judge whether information begins to send, other processing is identical, no longer describes in detail here.
In the inventive method, if what use in step 102 and the step 104 is that first kind and/or second method judge whether information begins to send and information when whether sending end, terminal equipment can add error detection code and carry out chnnel coding when the information of transmission, can guarantee that not only lower information detects false alarm rate, and can save a large amount of interface-free resources, thereby effectively utilize interface-free resources transmission effective information.Here, owing to do not add error detection code when carrying out chnnel coding, the correct transmission for guarantee information can be provided with power bias at terminal equipment, and the Block Error Rate that information is sent is controlled at acceptable scope.
If what use in step 102 and the step 104 is that first kind and/or second method judge whether that information begins to send and whether information sends and finish, and when needing strict guarantee message transmission correct, terminal equipment also can add error detection code and carry out chnnel coding when the information of transmission, be used for the correctness of authorization information transmission after message pick-up; Because the present invention, adopted the front/rear condition code mechanism of sewing to come detection information, can make false alarm rate keep reduced levels, therefore, when encoding, the adding error detection code needn't consider to use the multidigit error detection code to reduce false alarm rate, thereby can use the less bits error detection code to encode, such as: adopt 8 CRC sign indicating number to encode; Like this, promptly guaranteed low false alarm rate, the signaling consumption that also can reduction information sends still can be saved a large amount of interface-free resources relative to existing technologies.
In the above-described processing, not only effectively utilize interface-free resources, also alleviated the decoding burden of NodeB greatly.Wherein, the front/rear condition code of sewing that identification information begins to send does not participate in chnnel coding, NodeB just can discern whether receive the front/rear condition code of sewing by relative simple calculations, goes up whether information begins to send and whether information sends end thereby can detect up E-DCH.And in the prior art, detect by CRC check, then need NodeB to continue to decipher to the received signal, the CRC sign indicating number that obtains by decoding carries out verification calculating.Whether like this, no matter have information to send on the up E-DCH in the prior art, NodeB, thereby bring sizable decoding burden to NodeB if all will decipher to the received signal; Among the present invention, have on the up E-DCH before information sends detecting, NodeB does not decipher processing, but send in the information of having detected, and with after this message pick-up, just to this information decipher, processing such as verification, thereby effectively utilize the decode resources of system.
By background technology as can be known, described up E-DCH comprises: E-DPCCH and E-DPDCH.When E-DPCCH and E-DPDCH adopted time-multiplexed channel architecture, the information that terminal equipment of the present invention sends was: the information of up E-DPCCH or the information of up E-DPDCH or up E-DPCCH and the time-multiplexed information of E-DPDCH; When E-DPCCH and E-DPDCH adopt the channel architecture of code division multiplexing, because going up having or not of information, E-DPDCH can obtain by the information on the E-DPCCH, the information that terminal equipment therefore of the present invention sends is: the information of up E-DPCCH; Simultaneously, the up E-DPCCH information that NodeB receives by reading detects the information of up E-DPCCH.Below in conjunction with Fig. 2 and Fig. 3, to adopt above-mentioned first method to judge whether information begins to send and whether information sends and end up being example, when E-DPCCH and E-DPDCH were adopted the channel architecture of time division multiplexing and code division multiplexing, the different disposal of the inventive method was illustrated.
Among Fig. 2, E-DPCCH and E-DPDCH adopt time-multiplexed channel architecture.As shown in Figure 2, sent N E-DCH Unit on the up E-DCH continuously, terminal equipment is before sending E-DCHUnit1, at first send a prefix condition code, identify the beginning of this transmission, send N E-DCH Unit then continuously, and after sending E-DCH UnitN, send a suffix condition code, identify the end of this transmission.Wherein, described E-DCH Unit can only be the E-DCHUnit of E-DPCCH, can only be the E-DCH Unit of E-DPDCH also, perhaps is the time-multiplexed E-DCH Unit of E-DPCCH and E-DPDCH.
Among Fig. 3, E-DPCCH and E-DPDCH adopt the channel architecture of code division multiplexing.As shown in Figure 3, N E-DPCCH Unit and E-DPDCH Unit have been sent on E-DPCCH and the E-DPDCH respectively continuously, different with situation shown in Figure 2, terminal equipment only before sending E-DPCCH Unit1, at first sends a prefix condition code, identifies the beginning of this transmission, send E-DPCCH Unit and E-DPDCH Unit then continuously, and after sending E-DPCCH UnitN, send a suffix condition code, identify the end of this transmission; But terminal equipment does not add the front/rear condition code of sewing when sending E-DPDCH Unit, when NodeB receives E-DPCCH Unit, can learn that by the information that reads wherein E-DPDCH goes up beginning/end situation that information sends.Here, about how to learn that by the information on the E-DPCCH E-DPDCH goes up the situation that information sends, belong to known technology, this paper is not further described.
In sum, when application the inventive method can make the information of NodeB on detecting up E-DCH send situation, save a large amount of interface-free resources, do not taken too much decode resources, improved the message pick-up efficient of up E-DCH on the whole.
Claims (9)
1. the detection method of an ascending reinforced special channel E-DCH is characterized in that, terminal equipment transmission information does not add when carrying out chnnel coding and is used for the error detection code that auxiliary NodeB detects, and sends the prefix condition code before transmission information; This method also comprises step:
Whether the a.NodeB basis receives described prefix condition code is judged that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
2. method according to claim 1 is characterized in that, this method also comprises: terminal equipment sends the suffix condition code after sending information;
Among the step b, the described method of judging whether the last information of up E-DCH sends end is: whether according to the information that receives is that described suffix condition code is judged.
3. method according to claim 1, it is characterized in that, among the step b, the described method of judging whether the last information of up E-DCH sends end is: confidence level and preset reliable degree thresholding according to current information decoding judge whether current information is effective, if effectively, then information does not send and finishes; If invalid, then information sends and finishes.
4. according to each described method of claim 1 to 3, it is characterized in that, up enhancing Dedicated Physical Control Channel E-DPCCH and special physical data channel for upload enhance E-DPDCH adopt time-multiplexed channel architecture, and the information that described terminal equipment sends is: the information of up E-DPCCH or the information of up E-DPDCH or up E-DPCCH and the time-multiplexed information of E-DPDCH.
5. according to each described method of claim 1 to 3, it is characterized in that up E-DPCCH and up E-DPDCH adopt the channel architecture of code division multiplexing, the information that described terminal equipment sends is: the information of up E-DPCCH; Simultaneously, the up E-DPCCH information that NodeB receives by reading detects the information of up E-DPCCH.
6. the detection method of a up E-DCH is characterized in that, terminal equipment transmission information does not add when carrying out chnnel coding and is used for the error detection code that auxiliary NodeB detects, and sends the suffix condition code after transmission information; This method also comprises step:
A.NodeB judges that up E-DCH goes up information and whether begins to send, if, execution in step b; Otherwise the rejection current information continues execution in step a;
B. receive current information, and judge that according to whether receiving described suffix condition code up E-DCH goes up information and whether sends end, if, rejection current information, execution in step a; Otherwise continue execution in step b.
7. method according to claim 6, it is characterized in that, among the step a, the described method of judging whether the last information of up E-DCH begins to send is: confidence level and preset reliable degree thresholding according to current information decoding judge whether current information is effective, if effectively, then information begins to send; If invalid, then information does not begin to send.
8. according to claim 6 or 7 described methods, it is characterized in that, up E-DPCCH and up E-DPDCH adopt time-multiplexed channel architecture, and the information that described terminal equipment sends is: the information of up E-DPCCH or the information of up E-DPDCH or up E-DPCCH and the time-multiplexed information of E-DPDCH.
9. according to claim 6 or 7 described methods, it is characterized in that up E-DPCCH and up E-DPDCH adopt the channel architecture of code division multiplexing, the information that described terminal equipment sends is: the information of up E-DPCCH; Simultaneously, the up E-DPCCH information that NodeB receives by reading detects the information of up E-DPCCH.
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| CN101175301B (en) * | 2006-11-01 | 2010-06-16 | 中兴通讯股份有限公司 | Sharing method for unscheduled and scheduled resource in ascending reinforcement system |
| CN101188486B (en) * | 2006-11-15 | 2010-04-14 | 中兴通讯股份有限公司 | Sharing method for non scheduled resources and scheduled resources in uplink enhanced system |
| CN101640898B (en) * | 2009-08-20 | 2012-01-25 | 华为技术有限公司 | Detection method, detection device, detection system and base station |
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