CN105474564A - Interference signal control information acquisition method and apparatus for use in wireless communication system - Google Patents
Interference signal control information acquisition method and apparatus for use in wireless communication system Download PDFInfo
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- CN105474564A CN105474564A CN201480046388.7A CN201480046388A CN105474564A CN 105474564 A CN105474564 A CN 105474564A CN 201480046388 A CN201480046388 A CN 201480046388A CN 105474564 A CN105474564 A CN 105474564A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
- H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0026—Interference mitigation or co-ordination of multi-user interference
- H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
- H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0046—Code rate detection or code type detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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Abstract
An interference signal control information acquisition method and apparatus for use in the wireless communication system is provided. The interference signal information detection method of a terminal for use in a wireless communication system includes acquiring a first control information part and a second control information part of other users from a received signal, generating a first control information candidate identical in bit length with the first control information part, blindly decoding first control information based on the first control information candidate, and detecting and removing interference signals of the other users from the received signal based on the blindly decoded first control information.
Description
Technical field
The disclosure relates to a kind of wireless communication system.More specifically, the disclosure relates to interference signal control information acquisition methods for using in a wireless communication system and device.
Background technology
Mobile communication system is developed to user and provides the voice communications services in moving.Along with the rapid advances of technology, current mobile communication system has developed into is supporting high speed data communication services outside the service of voice.But resource limited in a current mobile communication system and the user to the service of more speed require to promote to evolve to more advanced mobile communication system.
If terminal can remove interference signal based on about the information of multi-access inference (MAI) and presence of intercell interference information, then this may contribute to the receptivity strengthening terminal.This type of interfere information is increased in the accuracy of multi-user's multiple-input and multiple-output (MIMO) and the interference signal model in cell edge environment, makes terminal more effectively can eliminate interference.
Such as, but in a wireless communication system, in such as high-speed packet access (HSPA), base station needs to use the specific identifier of terminal, and radio network temporary identifier (RNTI) performs the extra computing of the scrambling of coded data.In this case, because terminal does not know the identifier of other-end, so be difficult to the control information obtaining other-end.
Summary of the invention
Technical problem
Therefore need to study the method for terminal itself, to remove interference signal.
Above-mentioned information is proposed as just background information, to help understanding of the present invention.Whether can be suitable for as relative to prior art of the present disclosure for any above-mentioned aspect, not judge, also do not assert.
Solution
Each aspect of the present invention is used at least solving the problem and/or shortcoming, and provides advantage at least described below.Therefore, an aspect of of the present present invention is to provide a kind of interference signal blind checking method and device of the terminal for using in cellular radio Communication system.
According to an aspect of the present invention, a kind of interference signal information detecting method of the terminal for using in a wireless communication system is provided.Interferer signal detection method comprises the first control information part from other users of signal acquisition received and the second control information part, produce the first control information candidate that bit length is identical with the first control information part, based on the first control information candidate, blind decoding is carried out to the first control information, and detect from Received signal strength based on the first control information of blind decoding and remove the interference signal of other users.
According to another aspect of the present invention, provide the terminal for obtaining interference signal information for using in a wireless communication system.This terminal comprises: transceiver, it is configured to send and Received signal strength to from base station, and controller, it is configured to the first information part and the second control information part that control from Received signal strength, obtain other users, to produce the bit length first control information candidate identical with the first control information part, based on the first control information candidate, blind decoding is carried out to the first control information, and detect from the signal received based on the first control information of blind decoding and remove the interference signal of other users.
From by reference to the accompanying drawings, disclose in the following detailed description of various embodiment of the present disclosure, other aspects of the present invention, advantage and notable feature will become apparent for those skilled in the art.
Beneficial effect
Interference signal control information acquisition methods of the present disclosure and device can the control informations of other users of blind Detecting.It is favourable that interference signal control information acquisition methods of the present disclosure and device remove for interference signal for the interference signal information that the control information based on the blind Detecting from other users obtains.
Accompanying drawing explanation
From following description by reference to the accompanying drawings, above-mentioned and other side, the feature and advantage of some embodiment of the present disclosure will be more obvious, in the accompanying drawings:
Fig. 1 illustrates according to disclosure embodiment, is used as carrying the figure of the configuration of the device of the Common Control Channel of the control information about the high-speed downlink shared channel (HS-DSCH) in downlink packet access (HSDPA) at high speeds for generation of high speed signaling control channel (HS-SCCH);
Fig. 2 is the figure of the process of the generation control information illustrated according to disclosure embodiment;
Fig. 3 is the block diagram of the configuration of the common HSDPA receiver illustrated according to disclosure embodiment;
Fig. 4 is the figure of the control information processing method illustrated according to disclosure embodiment;
Fig. 5 illustrates according to disclosure embodiment, and the terminal being arranged in cell edge is wherein disturbed the figure of the exemplary cases of impact at cellular radio Communication system;
Fig. 6 is the block diagram of the configuration of the receiver illustrated according to embodiment of the present disclosure;
Fig. 7 is the block diagram of the configuration of the interfered cell control information blind Detecting unit of the Fig. 6 illustrated according to disclosure embodiment; And
Fig. 8 is the flow chart of the interference cancellation process of the terminal illustrated according to disclosure embodiment.
In whole accompanying drawing, it should be noted, similar reference number for describing same or analogous element, characteristic sum structure.
Embodiment
The complete understanding of the of the present disclosure various embodiment providing the following description with reference to accompanying drawing to be limited by claims and equivalent thereof with assistance.Comprise various specific detail to help to understand, but these will be regarded as merely exemplary.Therefore, person of skill in the art will appreciate that, can variations and modifications be carried out to various embodiment described here and not depart from the scope of the present disclosure and spirit.In addition, the description can omitted for known function and structure for clarity and conciseness.
The term used in description below and claim and word are not limited to literal meaning, but are only known and consistent understanding for enabling the disclosure by inventor.Therefore, it will be clear for those skilled in the art that the following description providing various embodiment of the present disclosure is only for illustration of object, instead of in order to limit the object of the present disclosure limited by claims and equivalent thereof.
But should be appreciated that singulative " ", " one " and " being somebody's turn to do " comprise plural, unless context clearly separately has regulation.Therefore, such as, mention that " assembly surface " comprises and mention one or more surface like this.
In addition, the detailed description of function and structure well known in the art, and not directly related with the present invention technology contents can be omitted.This object omits unnecessary description, to make theme of the present disclosure clear and definite.
For the same reason, some elements are exaggerated, omitted or are simplified in the accompanying drawings, and element in practice can have and those shown in the accompanying drawings different sizes and/or shape.Identical reference number is used in reference to same or analogous parts in whole accompanying drawing.
Advantage of the present disclosure and feature and the method realizing them can be understood more readily by by reference to the following the detailed description and the accompanying drawings of various embodiment.But the disclosure can be presented as many multi-form, and should not be construed as limited to various embodiment set forth herein.On the contrary, provide these various embodiments to make the disclosure to be thoroughly with complete, and concept of the present disclosure is conveyed to those skilled in the art all sidedly, and the disclosure only will be limited by appending claims.In whole specification, the element roughly the same of reference numbers roughly the same.
Should be appreciated that each piece in flow chart and/or block diagram, and the combination of block in flow chart and/or block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of all-purpose computer, special-purpose computer or other programmable data processing unit to produce a kind of machine, make to produce device for realizing the function/action of specifying in the block of flow chart and/or block diagram or multiple pieces via the instruction performed by the processor of computer or other programmable data processing unit.These computer program instructions can also be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing unit, the instruction be stored in computer-readable memory is produced comprise to realize the manufacture article of the command device of the function/action of specifying in the block of flow chart and/or block diagram or multiple pieces.This computer program instructions can also be loaded into computer or other programmable data processing unit, to make sequence of operations step to perform on computer or other programmable device thus to produce computer implemented process, the instruction performed on the computer or other programmable apparatus is made to be provided for realizing the step of the function/action of specifying in the block of flow chart and/or block diagram or multiple pieces.
In addition, corresponding block diagram can illustrate the part of the module of at least one or more executable instruction comprised for performing specific logical function, section or code.In addition, it should be noted that, the function of block can be carried out in a different order in multiple modification.Such as, two continuous print blocks can perform substantially simultaneously, or may perform in reverse order according to their function.
Term " module " according to embodiment of the present disclosure means, but the software be not limited to for performing some task or nextport hardware component NextPort, such as field programmable gate array (FPGA) or application-specific integrated circuit (ASIC) (ASIC).Module can be advantageously configured for residing on addressable storage medium, and is configured to perform on the one or more processors.Therefore, by way of example, module can comprise assembly, as the section of component software, OO component software, class component and task component, process, function, attribute, process, subprogram, program code, driver, firmware, microcode, circuit, data, database, data structure, table, array and variable.The function provided in assembly and module can be combined into less assembly and module, or is separated into extra assembly and module further.In addition, assembly and module can be implemented as and make it perform the one or more CPU in equipment or secure multimedia card.
The disclosure relates to based on interference signal information, and particularly, the interference elimination method of interference signal control information, for the extractive technique that the receptivity in the interference region in cellular radio Communication system strengthens.
By removing interference signal based on multi-access inference (MAI) or presence of intercell interference (ICI) information, terminal obtains receptivity gain.This type of interfere information is increased in the accuracy with the interference signal model in cell edge environment in multi-user's multiple-input and multiple-output (MIMO), makes terminal more effectively can eliminate interference.
The disclosure relates to a kind of method for this interfere information of blind Detecting in the third generation (3G) high-speed packet access (HSPA) system.
In a wireless communication system, if terminal is attached to base station, then unique subscriber equipment (UE) identifier (ID) is distributed to this terminal to identify by base station.Meanwhile, to be come to target terminal by common downlink control channel, that is, object UE sends the mode of data channel information and object UE ID, and base station is to object UE distribute data channel.
Then, the UEID of the UEID that each terminal compares the result as control channel decoding and obtains and distribution, to determine whether to perform data channel decoding.
Fig. 1 illustrates according to disclosure embodiment, is used as carrying the figure of the configuration of the device of the Common Control Channel of the control information about the high-speed downlink shared channel (HS-DSCH) in downlink packet access (HSDPA) at high speeds for generation of high speed signaling control channel (HS-SCCH).
The first control information generation unit 110 that can produce HS-SCCH part 1 and the second control information generation unit 120 that can produce HS-SCCH part 2 produce modulation index and code assign ment information to each data channel, as HS-DSCH.
Cyclic redundancy check (CRC) (CRC) produces & radio network temporary identifier (RNTI) masking unit 130 and uses the second control information of the first control information of such as HS-SCCH part 1 and such as HS-SCCH part 2 to produce 16 CRC information as error-detecting code, to check in decoded result in the presence/absence of mistake.Whether CRC produces & RNTI masking unit 130 and utilizes UEID, that is, RNTI shelters 16 CRC, can use with the Resourse Distribute being checked through corresponding terminal.Described CRC produces & RNTI masking unit 130 and the CRC sheltered is added to the second control information being transferred to coding unit, that is, the ending of HS-SCCH part 2.
Coding unit comprises: the first channel encoding unit 140, to perform the coding of channel 1, and second channel coding unit 150, to perform the coding of channel 2, it is responsible for coding first control information respectively, namely, HS-SCCH part 1 and the second control information, that is, HS-SCCH part 2.
Similarly, de-rate matching unit comprises: first rate matching unit 160 is to perform rate-matched 1 and the second de-rate matching unit 170 to perform rate-matched 2.
The specific scrambling unit 180 of UE is the functional blocks of only the first control information being carried out to scrambling.The specific scrambling unit of UE 180 produces the random scrambled code based on UEID (such as RNTI), and the code that utilization produces performs the scrambling for the output of first rate matching unit 160.In addition, the device of Fig. 1 comprises physical channel map unit 190.
As analogized from description above, the second control information can be decoded when not having UEID (i.e. RNTI), and the first control information can not utilize UEID and be descrambled.
Fig. 2 is the figure of the process of the generation control information illustrated according to disclosure embodiment.
Due to except information represents with the length of bit, similar in FIG of the feature described in fig. 2, so omit its detailed description at this.
Fig. 3 is the block diagram of the configuration of the HSDPA receiver illustrated according to disclosure embodiment.
Can comprise with reference to Fig. 3, HSDPA receiver: Serving cell control information detecting unit 310, demodulating unit 310 and decoding unit 330.
Detect the control information that the Serving cell control information detecting unit 310 of HS-SCCH uses the UEID (i.e. RNTI) distributed by Serving cell to come reception, HS-SCCH carries out demodulation code.Serving cell control information detecting unit 310 verifies the validity of decoded result.If decoded result is effective, Serving cell control information detecting unit 310 sends from described first control information to demodulating unit 320, the information about data channel (i.e. HS-DSCH) extracted in the decoded result of (i.e. HS-SCCH part 1) and the second control information (i.e. HS-SCCH part 2).
The demodulator 320 performing HS-DSCH demodulation uses the code resource of modulation index and the distribution of extracting from control information (i.e. HS-SCCH), by the signal receiving of reception to data channel, i.e. and HS-DSCH.Demodulating unit 310 sends demodulation result to decoding unit 330.
Decoding unit 330 decoded data channel, to obtain the data sent by base station.
Fig. 4 is the figure of the control information processing method illustrated according to disclosure embodiment.
For control information (i.e. HS-SCCH), according to the first control information bit, i.e. part 1 bit and the second control information bit, namely part 2 bit produces CRC bit.Therefore, in order to the control information bit of decoding all, i.e. HS-SCCH information bit, then the detection for both the first and second control informations and decoding should be performed, and for the inspection of CRC result.
Now, more high-rise notice, up to the channelization codes of other users of 4, comprises the channelization codes of the control information (i.e. HS-SCCH) of corresponding terminal.Consequently, terminal needs for the control information (i.e. HS-SCCH) approximately up to 4 checks all CRC results, to select the control information bit distributing to this terminal, i.e. and HS-SCCH information bit.
With reference to Fig. 4, demapping physical channels unit 490 for the semiology analysis demapping physical channels be included in the time slot 0 of subframe, with the first control information bit of decoding, i.e. part 1 information bit.
Then, the specific Descrambling unit 480 of UE use UEID perform for demapping symbol go shelter, in this case, can obtain to 40 bits utilize the first control information to remove the UEID sheltered to be suitable for 3G partner program (3GPP) standard by the unique UEID of expansion.
The derate that first derate (derate) matching unit 460 performs for the symbol going to shelter is mated.
First channel decoding unit 440 performs Viterbi (Viterbi) decoding of the symbol for derate coupling.
Go in the process of sheltering at UEID, the being corrected property of code word of corresponding control information (i.e. HS-SCCH) is recovered, and the code word of the HS-SCCH of another user is out of shape further, make decoder output metric (metric) value of the control information (i.e. HS-SCCH) distributing to other users different from the decoder output degree value of the control information (i.e. HS-SCCH) of corresponding terminal.First channel identifying unit 440 metric more each other selects the control information (i.e. HS-SCCH) with most high reliability to be used as the first control information, i.e. the bit of HS-SCCH part 1.
Then, the first control information resolution unit 410 uses selected control information, and namely the channelization codes of HS-SCCH detects and the second control information bit be comprised in the first and second time slots of decoding.
Similarly, the second control information decode procedure carries out with the opposite sequence of cataloged procedure.
The the second control information symbol utilizing channelization codes to detect sequentially by demapping physical channels unit 490, perform the second derate matching unit 470 that derate mates 2 and the second channel decoding unit 450 that can perform Veterbi decoding processes.CRC check & RNTI demasking unit 430 adds the first control information bit of decoding on the bit obtained by above-mentioned process, and perform CRC thereon to determine that whether decoding is successful, and provide the bit of interpolation to the second control information resolution unit 420.
Fig. 5 illustrates according to disclosure embodiment, and the terminal being arranged in cell edge is wherein disturbed the figure of the exemplary cases of impact at cellular radio Communication system.
With reference to Fig. 5, may there is the interference from neighbor cell in cell edge region 500 place in cellular radio Communication system.Usually, the signal received by terminal 530 can comprise the inter-cell interference signals from neighbor cell 510, and is sent to the signal of terminal 530 from serving BS 520.Therefore, the interference signal from neighbor cell 510 causes in demodulation from the hydraulic performance decline the signal that Serving cell 520 receives.
If terminal 530 can obtain the information about interference signal, then may by by the message reflection about interference signal to the demodulation of Received signal strength, or in other words, by carrying out the signal that demodulation receives according to the information about interference signal, improve receptivity.In order to extract the information about interference signal, terminal 530 can use the interference cancellation algorithm of enhancing, and such as joint detection algorithm ensures good receptivity.
But in wireless communication standard, as in common HSPA, terminal 530 can receive only its Serving cell RNTI.This means that terminal 530 can not extract the information about interfered cell and interference signal, and therefore, it is limited to inter-cell interference cancellation.Under the exemplary cases of HSPA, because coded data is utilized as the RNTI scrambling of terminal identifier, so HSPA control information, that is, HSPAHS-SCCH can not be decoded when not having the RNTI of corresponding terminal.
Present disclosure proposes one can solution to the problems described above.In detail, according to terminal blind decoding and the control information detected about other-end of embodiment of the present disclosure, and in the signal of process reception, the control signal of other-end is reflected.Characteristic of the present disclosure will be described in detail below.
Fig. 6 is the block diagram of the configuration of the receiver illustrated according to embodiment of the present disclosure.
Serving cell control information detecting unit 610, it also can be described as Serving cell HS-SCCH detector 610, perform the demodulation code to using the UEID (i.e. RNTI) distributed by Serving cell and the control information (i.e. HS-SCCH) received, and verify the validity of the control information received.If control information is effective, then Serving cell control information detecting unit 610 sends information about the HS-DSCH extracted in the decoded result from the first control information (i.e. HS-SCCH part 1) and the second control information (i.e. HS-SCCH part 2) to data demodulation unit 620, and it also can be described as HS-DSCH demodulator 620.
Interfered cell control information blind Detecting unit 640, it also can be called interfered cell HS-SCCH blind tester 640, performs the demodulation to interfered cell signal.Interfered cell control information blind Detecting unit 640 produces candidate UEID, i.e. candidate RNTI, and the control information of the decoding detected by blind HS-SCCH.Interfered cell control information blind Detecting unit 640 is by the control information of candidate UEID and decoding, and be sent to control information marginal testing unit 650 together with reliability information, it also can be described as HS-SCCH information reliability detector 650.
The control information marginal testing unit 650 performing the inspection of HS-SCCH information reliability is determined to use the reliability information about decoded result, such as, and the soft metric of decoding unit the and whether interfere information of Blind extracting is effective.If interfere information is effective, then control information marginal testing unit 650 sends the information be used for eliminating the decoding used in interference to data demodulation unit 620 (it also can be described as HS-DSCH demodulator 620).
Data decoding unit 630 can provide the reliability information (such as soft metric) about finally decoded data to be used as the byproduct of decoding.
In best channel circumstance, such as, have high s/n ratio (SNR), decoding error occurs hardly, and during this time, reliability has very high value.When reliability is high, can determine successfully decoded and therefore, the control information (i.e. HS-SCCH) of other relevant users is effective.
In a similar fashion, data decoding unit 630 can the data of recompile decoding, to extract based on the reliability information of difference from input data.Be judged as effective control information, namely HS-SCCH is sent to interference cancellation receiver, uses in demodulating data channel.
Data demodulation unit 620 (i.e. HS-DSCH demodulator 620) can use modulation index (as modulation order) and the code resource from the distribution of serving and extract interference control information, from the signal received, remove interference signal.Modulating unit 620 can the data of demodulation Serving cell, and demodulation result is sent to data decoding unit 630.
Although describing is comprise the exemplary situation of multiple unit for wherein terminal, the disclosure is not limited thereto.Such as, terminal can comprise for sending and the transceiver of Received signal strength to from base station, and for the controller of the integrated operation that controls this terminal.
In this case, control unit obtains the first and second control information parts about other users from the signal received, produce first candidate's control information of the bit length corresponding to the first control information part, perform the blind decoding to the first control information based on first candidate's control information, and detect from the data received based on the first control information of blind decoding and remove the interference signal of other users.
Terminal can be implemented according to various embodiment, and is not limited to any embodiment of the present disclosure.
Fig. 7 is the block diagram of the configuration of the interfered cell control information blind Detecting unit of the Fig. 6 illustrated according to disclosure embodiment.
With reference to Fig. 7, interfered cell control information blind Detecting unit 640 can comprise: other community demapping physical channels unit 710, second control information decoder 720, first control information candidate information generator 730 and first control information blind decoding devices 740.
Other community demapping physical channels unit 710 from the signal of other communities of signal receiving received, and export the first control information, i.e. the HS-SCCH part 1 of demodulation, and the second control information, that is, HS-SCCH part 2.
In this case, because do not need UEID, i.e. RNTI, so the second control information, that is, HS-SCCH part 2 by the first control information decoder 720 for perform derate coupling the second derate matching unit 722 of 2 and the second channel decoding unit 724 for performing channel-decoding 2 decode.
For the first control information blind decoding, namely, HS-SCCH part 1 blind decoding, the second control information that is decoded, decoding by utilizing CRC and RNTI to shelter, that is, HS-SCCH part 2, and the second control information of decoding, that is, 16 bits of the afterbody of HS-SCCH part 2 are sent to the first control information blind decoding device 740.
First control information comprises 8 bit informations.Also namely, the first control information can be made up of 8 information bits.Correspondingly, the first control information can indicate the candidate data of nearly 256 kinds, and allows the first control information candidate information generator 731 that can perform HS-SCCH part 1 candidate generation to corresponding coded data.
CRC generation unit 732 based on the first control information candidate of supposition, that is, HS-SCCH part 1 candidate, and produce 256 CRC candidates by performing the second control information that the second control information decoding unit 720 that HS-SCCH part 2 decodes obtains.
CRC demasking unit 733 utilizes candidate CRC demasking afterbody 16 bit to be used as the decoded result of the second control information (i.e. HS-SCCH part 2), to produce 256 candidate RNTI.
Candidate UE specifically shelters sequence production unit 734 and uses candidate RNTI to produce 256 candidate's scramble sequence according to predetermined rule, for scrambling control information coded data, i.e. and HS-SCCH coded data.
By performing 256 candidate HS-SCCH data producing of the first control information candidate generation unit 731 that HS-SCCH part 1 candidate produces by the first control information coding unit 735 that can perform HS-SCCH part 1 and encode, and de-rate matching unit 736 processes, to produce the candidate first control information data of 256 codings, i.e. candidate HS-SCCH part 1 coded data.
First control information blind decoding device 740, it also can be called blind HS-SCCH part 1 decoder 740, measures the coefficient correlation between the data candidate and the data being utilized the first control information demodulation by demodulating unit of the specific scrambling coding of UE.The first control information candidate with the highest coefficient correlation selected by first control information blind decoding device 740.
The data candidate that the specific scrambling unit of UE 741 performing the specific scrambling of UE uses 256 to encode and corresponding scrambling code candidate are to produce scrambling result.
Maximum likelihood (ML) decoding unit 742 calculates modulated first control information data (the i.e. HS-SCCH part 1) demodulating data that receives from other community demapping physical channels unit 710 and coefficient correlation between the coded data of 256 scramblings produced by the specific scrambling unit of UE.
Fig. 8 is the flow chart of the interference cancellation process of the terminal illustrated according to embodiment of the present disclosure.
Interference cancellation process according to the terminal of disclosure embodiment comprises: the first and second message parts obtaining another user, produce the first control information candidate of mating the first control information on bit length, based on the first control information candidate blind decoding first control information, and based on the first control information of blind decoding from the operation of interference signal of other users of input received.
With reference to Fig. 8, a kind of the first control information based on blind decoding is provided to detect and eliminate the method for interference signal.
Interference cancellation process will describe with reference to figure 8 hereinafter in more detail.
First terminal performs control information demodulation and maps in operation S810.This can comprise sense terminals and use by the channelization codes of more high-rise notice current the second control information symbol that monitoring, other users, that is, HS-SCCH part 2 symbol of another user.By this process, terminal can obtain the first and second control information parts about other users.
Then, terminal is in operation S820 place decoding second control information part.In order to this object, terminal is by demapping physical channels, and derate is mated, and channel-decoding detects and the second control information of decoding.As the result of this process, terminal can obtain the decoded bits information of the second control information.Terminal can determine through decoding the second control information part as the second control information.
Next, terminal produces the bit candidate of 256 codings being used for the first control information part in operation S830.When HS-SCCH Class1, the first control information part (i.e. part 1) is 8 bit long.Therefore, be necessary that consideration 256 bit sequences are used as the candidate of the first control information part.
Next, terminal produces 256 the CRC candidates corresponding to 256 the first control information part candidates in operation S840.As mentioned above, due to only in the process of coding second control information CRC bit shelter UEID, so information bit is kept intact, and not processed.
Therefore, terminal combinations corresponds to the first control information part and the second control information part, that is, 256 candidate's bit sequences of part 2 information, to produce 256 CRC candidates.
Next, terminal derives 256 UEID, such as RNTI in operation S850 from 256 CRC candidates.In order to realize this point, the CRC part of the second control information bit that terminal compares 256 CRC candidates and determines, to estimate the UEID sheltered by reference to the first control information sequence (part 1 information sequence).
By said process, create 256 16 bit UEID candidates.
Then, terminal produces about and/or is associated in 256 scramble sequence of 256 RNTI candidates in operation S860.In detail, UEID or RNTI of 256 16 bits that terminal processes is estimated in prior operation, shelters sequence with what produce 40 bits according to standard.
Next, terminal utilizes the first control information bit in operation S870, namely, 256 candidates of bit sequence carry out scrambling, that is, shelter the bit sequence of coding, or in other words, 256 the first control information code bit sequences being associated with scrambler bits sequence of scrambling.In detail, terminal utilize coding and the first control information candidate of rate-matched be sequestered in before generation in operation 256 40 bits shelter pattern (pattern).In embodiment of the present disclosure, shelter process and can be called as blind decoding operation.
Then, terminal calculates at candidate's bit sequence in operation S880, that is, the coefficient correlation between the first control information of demodulation of sheltering the signal of candidate and reception of the first control information.Also namely, terminal calculates the coefficient correlation between 256 40 bit informations sheltered and decoded first control information of other users produced in operation before.Terminal is finally selected and/or is determined the first control information of the sequence corresponding to the highest coefficient correlation, as first control information of other users.
The coefficient correlation used in above process can be expressed as formula 1.
[mathematical expression 1]
C
k[i]: i-th bit value of the coded data candidate of a kth scrambling
Y [i]: i-th soft bit values of demodulating data
M
k: the coefficient correlation between the coded data candidate and demodulating data of a kth scrambling
Nbit: the quantity of the coded-bit of coded data
Finally, terminal send in operation S890 have the first control information of maximum correlation coefficient, RNTI candidate and for the coefficient correlation of marginal testing to control information marginal testing equipment, or the sequence that in other words, terminal determines to have the highest coefficient correlation is used as first control information of other users.
If reliability is verified, then terminal determines the control information of this first control information as other users.
The determined first information of other users can comprise the channelization codes and modulation index information that are associated with the data channel for other users.Utilize the channelization codes and modulation index information that are associated with the data channel of other users, terminal can check the interference signal of other users.
Therefore, terminal can remove the interference signal caused by other users, to obtain required signal from received signal.
With the control signal of other users of blind Detecting and the mode extracted about the information of the interference signal of other users, interference signal control information acquisition methods of the present disclosure and device are favourable removing in interference signal from the signal received.
As mentioned above, interference signal control information acquisition methods of the present disclosure and device can the control informations of other users of blind Detecting.It is favourable that interference signal control information acquisition methods of the present disclosure and device remove in interference signal in the interference signal information that the control information based on the blind Detecting from other users obtains.
Although illustrate and describe the disclosure with reference to various embodiment, but those skilled in the art should understand that, when not departing from the spirit and scope of the present disclosure limited by claims and equivalent thereof, can carry out various change in form and details here.
Claims (18)
1. an interference signal information detecting method for terminal in a wireless communication system, described method comprises:
The first control information part and the second control information part of other users is obtained from the signal received;
Produce the first control information candidate identical on bit length with the first control information part;
Based on the first control information candidate blind decoding first control information; And
The first control information based on blind decoding detects and removes the interference signal of other users from the signal received.
2. method according to claim 1, described acquisition first control information part and the second control information part comprise: the second control information of decoding from described second control information part.
3. method according to claim 2, wherein, described first control information part is 8 bit long, and
Wherein, the generation of described first control information candidate comprises 256 candidates of generation first control information bit.
4. method according to claim 3, wherein, the generation of described first control information candidate comprises:
Candidate cyclic redundancy check (CRC) information is produced based on the candidate of the first control information bit and the second control information of decoding; And
Candidate terminal identifier is obtained from produced candidate CRC information.
5. method according to claim 4, wherein, blind decoding first control information comprises:
Produce based on obtained candidate terminal identifier and shelter sequence; And
Sequence is sheltered, the candidate of the first control information bit of encoding based on described.
6. method according to claim 5, wherein, blind decoding first control information comprises: the coding result based on the candidate of received signal and the first control information bit determines first control information of other users.
7. method according to claim 6, wherein, blind decoding first control information comprises: determine that the candidate had with the first control information bit of the most high correlation of received signal is the first control information.
8. method according to claim 7, wherein, described first control information part and the second control information part are for high speed signaling control channel (HS-SCCH), and
Wherein, described candidate terminal identifier is radio network temporary identifier (RNTI).
9. method according to claim 1, wherein, described detection and removal interference signal comprise:
Channelization codes and the modulation index of the data channel of other users is applied to from described first control information inspection; And
From the signal received, interference signal is removed based on described channelization codes and modulation index.
10., for obtaining a terminal for interference signal information in a wireless communication system, described terminal comprises:
Transceiver, it is configured to base station transmission signal with from base station received signal; With
Controller, it is configured to the first control information part and the second control information part that control from Received signal strength, obtain other users, produce the first control information candidate identical with the first control information part on bit length, based on the first control information candidate, blind decoding is carried out to the first control information, and detect from the signal received based on the first control information of blind decoding and remove the interference signal of other users.
11. terminals according to claim 10, wherein, described controller is further configured to and controls to decode the second control information from described second control information part.
12. terminals according to claim 11, wherein, described first control information part is 8 bit long, and
Wherein, described controller is further configured to 256 candidates of generation first control information bit.
13. terminals according to claim 12, wherein, described controller is further configured to and produces candidate cyclic redundancy check (CRC) information based on the candidate of the first control information bit and the second control information of decoding; And candidate terminal identifier is obtained from produced candidate CRC information.
14. terminals according to claim 13, wherein, described controller is further configured to and controls to produce based on obtained candidate terminal identifier to shelter sequence, and controls based on the described candidate sheltering sequence to encode the first control information bit.
15. terminals according to claim 14, wherein, described controller is further configured to the first control information controlling to determine other users based on the coding result of the candidate of received signal and the first control information bit.
16. terminals according to claim 15, wherein, it is the first control information that described controller is further configured to the candidate controlling to determine to have with the first control information bit of the most high correlation of received signal.
17. terminals according to claim 16, wherein, described first control information part and described second control information part are for high speed signaling control channel (HS-SCCH), and
Wherein, described candidate terminal identifier is radio network temporary identifier (RNTI).
18. terminals according to claim 10, wherein, described controller is further configured to the channelization codes and the modulation index that control to be applied to the data channel of other users from described first control information inspection, and controls from the signal received, to remove interference signal based on described channelization codes and modulation index.
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| KR10-2014-0000537 | 2014-01-03 | ||
| KR1020140000537A KR102167856B1 (en) | 2013-08-23 | 2014-01-03 | Method and apparatus for detecting an interference signal control information in wireless communication system |
| PCT/KR2014/007892 WO2015026214A1 (en) | 2013-08-23 | 2014-08-25 | Interference signal control information acquisition method and apparatus for use in wireless communication system |
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| WO2018218621A1 (en) * | 2017-06-01 | 2018-12-06 | Nokia Technologies Oy | Method and apparatus for bits number calculation and scrambling for cyclic redundancy check/parity distributed polar codes |
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| CN101682382A (en) * | 2007-06-19 | 2010-03-24 | 株式会社Ntt都科摩 | Base station device, user device, and method in mobile communication system |
| WO2013066935A1 (en) * | 2011-11-02 | 2013-05-10 | Qualcomm Incorporated | Blindly decoding interfering cell pdcch to acquire interfering cell pdsch transmission information |
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| KR102167856B1 (en) | 2020-10-20 |
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