CN109314617A

CN109314617A - For the fuzzy method avoided of CRC in 5G DCI decoding

Info

Publication number: CN109314617A
Application number: CN201680086363.9A
Authority: CN
Inventors: 霍尔格·诺伊豪斯; 迈克尔·霍瓦特; 拉尔夫·本德林
Original assignee: Intel IP Corp
Current assignee: Apple Inc; Intel Corp
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2019-02-05
Anticipated expiration: 2036-06-30
Also published as: WO2018004631A1; CN109314617B

Abstract

It discloses cyclic redundancy check (CRC) and obscures avoiding method.The CRC obscures avoiding method using one or both of scrambling initialization function and hash function both technologies, with for avoid based on polymerization grade (AL) physical downlink control channel (PDCCH) assumed and enhanced physical downlink control channel (ePDCCH) decoding in those of sender side coding mismatch.Scrambling polymerization grade of the initialization function based on transmitted PDCCH or ePDCCH scrambles control information.Hash function is based respectively on the polymerization grade of PDCCH or ePDCCH to change control channel element (CCE) or enhanced control channel element (eCCE) starting index.CRC obscures therefore erroneous judgement PDCCH or ePDCCH decoding that avoiding method avoids terminal.

Description

For the fuzzy method avoided of CRC in 5G DCI decoding

Technical field

This application involves the physical downlink control channels (PDCCH) and enhanced PDCCH (ePDCCH) in 3GPP Processing, and more particularly, to avoided at terminal erroneous judgement (false-positive) ePDCCH decoding.

Background technique

In third generation partner program (3GPP) long term evolution (LTE) forth generation mobile communication standard, claim in LTE For enhancement mode node B or eNodeB (eNB) base station transmitter via physical downlink control channel (PDCCH) by physical layer (PHY) transmitting and scheduling of common signal channel is to one or more terminals (being known as user equipment (UE) in LTE) in.

By PDCCH, UE is sent to the down link control information (DCI) of power control command etc by such as dispatching Or one group of UE.However, in LTE version 11, defining new control letter due to the limitation of the control channel capacity to PDCCH Road, i.e., enhanced PDCCH (ePDCCH), to support such as Inter-Cell Interference Coordination (ICIC), multiple-input and multiple-output (MIMO), wave The complex operations of beam shaping, coordinated multipoint transmission (CoMP) etc..

In the case where PDCCH only takes up the control area of subframe, ePDCCH occupies data area.Two control channels it Between there is also other differences.

In current LTE is realized, UE may mistakenly decode control area, this causes to judge PDCCH by accident, or may mistake Ground decoding data region, this causes to judge ePDCCH by accident.

Therefore, it is necessary to a kind of mechanism come the shortcomings that overcoming the prior art.

Detailed description of the invention

The aforementioned aspects of this document and many attendant advantages will become more clearly understood from, because by reference to retouching in detailed below State and in conjunction with attached drawing, be better understood with these aspects, wherein identical reference marker referred in different views it is identical Part, unless otherwise indicated.

Fig. 1 is the simplified block diagram of three PHY downlink transmission channels；

Fig. 2 is the figure of FDD LTE radio frame；

Fig. 3 shows the difference between the version 8PDCCH under LTE and version 11ePDCCH；

Fig. 4 is the figure for showing PDCCH construction；

Fig. 5 is the figure for showing the mapping of two ePDCCH set；

Fig. 6 A and Fig. 6 B are that the down link control information being shown respectively at transmitter for PDCCH and ePDCCH is handled Figure；

Fig. 7 is the figure for showing the CCE polymerization and PDCCH multiplexing operation for PDCCH of Fig. 6 A；

Fig. 8 is the logic for showing ePDCCH and the figure of subsequent physical RE distribution；

Fig. 9 is to show the mode for distributing to different eCCE starting indexes and the identical content using different polymerization grades coding Exemplary diagram；

Figure 10 be show using different polymerization grades coding currently existing technology LTE scramble sequence how to share it is identical The figure of initial scramble sequence；

Figure 11 is the simplified block diagram that CRC in accordance with some embodiments obscures avoiding method；

Figure 12 is the figure for showing the scrambling initialization function of the fuzzy avoiding method of CRC of Figure 11 in accordance with some embodiments；

Figure 13 is the figure for showing the hash function of the fuzzy avoiding method of CRC of Figure 11 in accordance with some embodiments and realizing；

Figure 14 be show Figure 11 in accordance with some embodiments CRC obscure avoiding method the second hash function realize Figure；And

Figure 15 is the simplified block diagram for the UE that the CRC in accordance with some embodiments that can be realized Figure 11 obscures avoiding method.

Specific embodiment

According to the embodiments described herein, discloses cyclic redundancy check (CRC) and obscure avoiding method.CRC is fuzzy to be avoided Method is using one or both of scrambling initialization function and hash function both technologies, for avoiding based on polymerization etc. Physical downlink control channel (PDCCH) and enhanced physical downlink control channel (ePDCCH) solution that grade (AL) is assumed Code with for sender side coding those of mismatch.Initialization function is scrambled based on transmitted PDCCH or ePDCCH Polymerization grade scrambles control information.Hash function is based respectively on the polymerization grade of PDCCH or ePDCCH to change control Channel element (CCE) or enhanced control channel element (eCCE) starting index.CRC obscures avoiding method and therefore avoids terminal Erroneous judgement PDCCH or ePDCCH decoding.

In the following detailed description, with reference to attached drawing, shown by way of diagram can practice it is described herein The specific embodiment of theme.It should be appreciated, however, that upon reading this disclosure, other embodiments are for ordinary skill people Member will become obvious.In other cases, well known structure, material or operation is not shown or described in detail to avoid fuzzy All aspects of this disclosure.Therefore, described in detail below to be not necessarily to be construed as limited significance, because the range being the theme is by claim It limits.

In other tasks, in media access control (MAC) layer-management uplink and downlink scheduling.MAC is by group It is made into logic channel and Traffic Channel, wherein logic channel includes the control channel for being used for transmission control and configuration information, business Channel is used for transmission data.The logic channel of MAC and Traffic Channel are mapped to the physical channel of PHY layer by transmission channel.In PHY Layer, physical channel are used to describe one group of running time-frequency resource of the transmission for transmitting channel.

In other cases, transmission channel is not mapped to any physical channel.These channels are referred to as 1/ layer of 2 (L1/ of layer L2) control channel, because information is originated from both physical layer (L1) and MAC layer (L2).The example of L1/L2 channel includes physical down Link control channel (PDCCH), enhanced PDCCH (ePDCCH) and physical control format indicator channel (PCFICH).Under In line link, L1/L2 control channel is for the distribution of such as downlink scheduling, uplink scheduling license and power control command Etc down link control information (DCI), make terminal (UE) that subsequent downlink transmission can be correctly decoded.It is different DCI message size (referred to as DCI format) correspond to send different types of control information.For example, DCI format 1C is 31 words The downlink DCI format of section is used for the compact distribution of specific use.Which kind of DCI is the factor of such as bandwidth of cell etc influence Format is used.

The transmission band of air interface between following LTE PHY channel occupancy eNB and UE.PCFICH provides information to UE To realize the decoding of PDCCH set.Before receiving one or more PDCCH, UE obtains PCFICH configuration.Further, from ENB obtains PDCCH before receiving physical down link sharing channel (PDSCH), and the PDCCH enables UE to make for dispatching The license of eNB is sent to physical uplink shared channel (PUSCH).PDSCH and PUSCH are respectively used between UE and eNB Data downlink transmission and uplink transmission.It is depicted in the simplification figure of Fig. 1 for LTE downlink operation Relationship between PCFICH, PDCCH and PDSCH.

In 3GPP LTE, downlink transmission and uplink transmission all uses the transmission side orthogonal frequency division multiplexing (OFDM) Case.In OFDM scheme, transmission can use frequency division duplex (FDD) or time division duplex (TDD) operation mode, and in downlink It is middle to use single-carrier frequency division multiple access (SC-FDMA) using different orthogonal frequency division multiple access (OFDMA) technologies, and in the uplink Technology.

Resource block is for illustrating the time/frequency of OFDM transmission " physical resource "/space construction.Every row corresponds to one A OFDM subcarrier, and each column corresponds to OFDM symbol.Spatial Dimension is indicated using two or more antenna ports, each Antenna port corresponds to each " layer " of resource block.In fig. 2 it is shown that the FDD LTE radio frame for 1.4MHz transmission.It is single A radio frame (duration 10ms) is subdivided into 10 subframes (duration 1ms) in the time domain, and in frequency domain In be subdivided into 6 subframes.Each subframe is further subdivided into two time slots (duration 0.5ms), also referred to as resource Block (RB).In this example, each RB is made of 12 subcarriers multiplied by seven OFDM symbols.

The minimum unit of subframe is the resource that dimension is a subcarrier (frequency), the duration is a symbol (time) Element (RE).In the figure 2 example, therefore each subframe RB is made of 84 RE.In Spatial Dimension, based on antenna port The quantity of quantity, subframe further increases.

As described above, ePDCCH is the new control channel introduced in the version 11 of LTE.Although some aspects of ePDCCH It is similar with PDCCH, but they are two different channels.Fig. 3 show LTE version 8 (tradition) PDCCH and version 11ePDCCH it Between difference.When PDCCH occupies control area, ePDCCH and PDSCH shared data region.Channel width range be from 0 to N_RB- 1 resource block.For 20MHz channel, N_RB=100.

The size of control area is to change and specified by PCFICH.As indicated, PCFICH is mapped to first Known location in OFDM symbol.In addition to mapping physical hybrid automatic repeat request indicator channel (PHICH) (not shown) it Outside, the remainder of control area is preserved for PDCCH mapping.PDCCH be located in the control area of each subframe and across More entire available bandwidth.On the contrary, ePDCCH occupies data area and crosses over sub-fraction bandwidth.

Each UE can be distributed configured with the ePDCCH specific to UE, by most two groups 2,4 or 8 RB to group At.Fig. 3 shows tool, and there are four RB couples of EPDCCH.For the eNB of the ability with version 11, identical downlink subframe can To support the ePDCCH decoding of the PDCCH decoding of tradition UE and the UE with 11 ability of version.Once PDCCH and ePDCCH is solved Code, UE are known which RB in data area corresponds to and are intended for the PDSCH of UE.

The mapping of traditional PDCCH to resource element follows predefined structure, to simplify the processing at UE.Control channel Element (CCE) is made of nine groups of resource element groups (REG), and wherein REG is by four continuous RE or by identical OFDM symbol and phase The four RE composition separated with the reference signal in resource block.The mapping of PDCCH to resource element uses CCE.

Quantity for giving the CCE of PDCCH is referred to as its polymerization grade (AL).For PDCCH, there are four kinds of AL, tables It is shown as AL1, AL2, AL4 and AL8.AL1 uses a CCE；AL2 uses two CCE；AL4 uses four CCE；And AL8 is used Eight CCE.The quantity of the CCE of each PDCCH depends on DCI format (because payload is different), channel encoding rate and UE letter Road condition.ENB determines which kind of AL used for given UE, so if the PDCCH for UE believes with undesirable downlink Road quality, then compared with the PDCCH with good channel quality for UE, can be used greater amount of CCE (for example, AL4 or AL8).

Fig. 4 is PDCCH structural map, and wherein CCE logical mappings are assigned to the control area of downlink subframe.In Fig. 4 In, six PDCCH are indicated in CCE logical mappings, are expressed as 0-5.First PDCCH is AL1PDCCH；Second and the 6th PDCCH comes from AL2；Third and the 5th PDCCH come from AL4；4th PDCCH is AL8PDCCH.

The exploded view of one of CCE, which shows CCE, will be mapped to that the control area of subframe.Constitute CCE REG with Space in PCFICH and PHICH Channel Sharing control area and by separating to reduce interference.

Fig. 5 shows the mapping of the ePDCCH in the data area of downlink subframe.It is configured with using each UE of ePDCCH One or two resource set of blocks, wherein can occur to the ePDCCH of UE to transmit.Each set can there are two, four or eight A RB pairs.In Fig. 5, ePDCCH set 1 by four RB to forming, and ePDCCH set 2 by two RB to forming.EPDCCH collection Conjunction is configured as localization or distributed.Therefore, two ePDCCH set can be provided to UE, one is configured to localization and passes It is defeated, and another is configured to distributed transmission.

Similar with PDCCH, ePDCCH is divided into enhanced control channel element (eCCE).In a typical case, each ECCE is made of four enhancement mode resource element groups (eREG), wherein each eREG is made of nine RE of a RB centering. The quantity of eCCE in ePDCCH is provided by its polymerization grade (AL), can be 1,2,4,8,16 or 32 (and PDCCH is limited to four A polymerization grade).EPDCCH uses one group of continuous (logic) eCCE.

The difference of the DCI processing for PDCCH and ePDCCH is shown respectively in Fig. 6 A and Fig. 6 B.For traditional PDCCH (figure 6A), 16 cyclic redundancy check (CRC) are attached to each DCI message payload (for example, 31).Disappear for some DCI Type is ceased, radio network temporary identifier (RNTI) is to the one or more UE being addressed by CRC even-odd check bitmask It is identified.This implicit coding of one/multiple UE identifiers ensures that only DCI is successfully decoded in expected (one or more) UE Message.

Next the position for being attached CRC is encoded by three volumes with 1/3 cbr (constant bit rate) with tail biting convolutional encoding device (TBCE) The DCI stream of code, such as 3* (31+16).Cyclic buffer is periodically read, until reaching for the available of E/PDCCH transmission Position payload.If position payload is less than cyclic buffer size, code rate is greater than 1/3；If cyclic buffer is not by Only primary to read, then code rate is lower than 1/3.Stream is also rate-matched, with the stock number suitable for PDCCH transmission.In PDCCH In processing, the CCE of the PDCCH from each coding is connected and is assigned to CCE polymerization and the spy in PDCCH Multiplexing Unit 30 Determine RE, CCE polymerization and PDCCH Multiplexing Unit 30 generate compound CCE 80 known herein, as described further below.

In scrambling unit 40, compound CCE 80 is scrambled using the scramble sequence specific to cell and subframe, with It is randomized inter-cell interference (ICI).It is that quadrature phase shift keying (QPSK) modulates and be mapped to RE after scrambling.In intertexture and spy During the cyclic shift stage of cell, the mapping specific to cell of PDCCH occurs.

With the processing of PDCCH shown in Fig. 6 A on the contrary, the eCCE of the ePDCCH of each coding in Fig. 6 B is not connected It connects.On the contrary, each ePDCCH set and its corresponding eCCE are treated separately.Once eCCE index is it is known that eCCE to RE Mapping just predefines in ePDCCH resource set.Therefore, the intertexture without multiple ePDCCH transmission.

Judge PDCCH by accident

UE executes the blind decoding of so-called PDCCH.This is because UE does not know the polymerization grade that eNB uses, is addressed to UE CCE starting index/position and the DCI format that uses of eNB.In order to reduce the decoded complexity of PDCCH, to continuous CCE Polymerization exist limitation.For example, the PDCCH that format is n CCE can only be started with the CCE for numbering the multiple equal to n.Therefore, AL1PDCCH can start in any initial position CCE (index)；AL4PDCCH with number the multiple for being four (for example, 0,4,8, 12 ...) CCE index beginning, etc..

Accordingly, there exist different polymerization grades to support different DCI format and channel width, and provide according to UE with Channel quality between eNB is come a possibility that adjusting decoding error protective number.Fig. 7 shows the CCE polymerization and PDCCH multiplexing of Fig. 6 A The example how unit 30 operates.Four row polymerization grades are depicted, every row is characterized by CCE, and fifth line is every The logical mappings for the PDCCH that a polymerization grade generates are addressed using CCE index (since 0).

First PDCCH (PDCCH_A) be made of single CCE.Therefore, PDCCH_AIt is AL1PDCCH, it means that can be used No more than 9 REG (36 RE) transmit PDCCH_AIn DCI.It is expressed as PDCCH_BAnd PDCCH_CSecond and third Two CCE compositions of each freedom of AL2PDCCH, and started with the CCE index of even-numbered.AL4PDCCH(PDCCH_D) have four A CCE, and AL8PDCCH (PDCCH_E) use eight CCE.For example, being in cell edge in UE and therefore having impaired In the case where channel quality, or in another example, in the case where the DCI for being sent to UE is extremely complex, it can be used PDCCH with higher AL is (for example, PDCCH_E)。

As shown in Figure 6A, the compound CCE 80 generated in CCE polymerization and PDCCH Multiplexing Unit 30 is being eventually mapped to It is scrambled before the control area of downlink subframe and is carried out QPSK modification.Unique CCE rope is distributed for each PDCCH Draw, as shown in the bottom of Fig. 7.

In order to assist blind decoding, search space public and specific to UE is defined.It is candidate (next which limits PDCCH From all possible combinations of CCE) quantity, for specific to the search space of UE be 16, and be directed to public search space It is 6.Due to the rate-matched based on cyclic buffer, the position of coding starts to repeat after first CCE.This is not together with Mean that multiple polymerization sizes can pass through CRC check together with the search space overlapping between polymerization grade.It generates successful CRC check but the blind decoding candidate not yet sent by eNB referred to as judge PDCCH candidate, erroneous judgement PDCCH or erroneous judgement candidate by accident.

Judge ePDCCH by accident

PDCCH with occupancy control area is on the contrary, ePDCCH is multiple with the PDSCH in the data area of subframe in a frequency domain With.As shown in figure 8, ePDCCH is mapped to the eCCE of continuous quantity, each eCCE (in a typical case) based on polymerization grade (wherein single eREG is made of 9 RE of a Physical Resource Block centering) is formed by four eREG.In order to define eREG, in RB All RE (not including DM-RS RE) with the preferential mode of frequency numbering cycle from 0 to 15.eREG_iIt is numbered by resource block pair It is formed for all RE of i.Although there may be up to 16 eCCE, when the first OFDM symbol is for controlling information (packet Include PDCCH) when, it may be less.

In fig. 8, ePDCCH mapping is started with logic RE mapping, and is terminated with the physics RE distribution in subframe.Divide first With eREG, the RE that each eREG is numbered by 9 is formed.Then, each RE for constituting each eREG is mapped to predefined position In subframe.Each eCCE is made of four eREG, and plus shade to be different from other eCCE.eCCE₁By eREG₀、eREG₄、 eREG₈And eREG₁₂Composition；eCCE₂By eREG₁、eREG₅、eREG₉And eREG₁₃Composition；eCCE₃By eREG₂、eREG₆、eREG₁₀With eREG₁₄Composition；And eCCE₄By eREG₃、eREG₇、eREG₁₁And eREG₁₅Composition.

If eNB specified polymerization grade is AL2, defined using two eCCE (respectively eREG there are four tools) ePDCCH.Therefore, it is possible to use eCCE₁And eCCE₂.For polymerization grade 4, ePDCCH is defined using four eCCE, and can To use eCCE₁、eCCE₂、eCCE₃And eCCE₄.With PDCCH on the contrary, for ePDCCH resource allocation be it is semi-static and It is configured by the higher of such as radio resource control (RRC) etc.It means that with the organizational form of PDCCH on the contrary, eCCE Index is identical for all ePDCCH candidates.

For the PDCCH and the specified hash function of ePDCCH in LTE, the different polymerization grades in search space are used for tissue (AL) sequence of PDCCH and ePDCCH candidate (for example, all available CCE or eCCE (referred to herein as e/CCE)) and Distribution.Hash function is a kind of algorithm, it receives the character string of random length, and is reduced to unique regular length character String.Hash function is used for password validity, data and message integrity and cryptography.

Before being mapped to the resource element of subframe, tissue is carried out to the CCE for PDCCH in a manner of logical mappings, Wherein each CCE identifies (Fig. 7) by CCE index.ECCE tissue for ePDCCH is as shown in Figure 8.

In LTE, the index of e/CCE is originated for physical uplink control channel (PUCCH) resource allocation.This meaning If starting e/CCE index change in some new realizations, PUCCH resource distribution will correspondingly change.

In the case where LTE PDCCH, the zero defect detection of PCFICH provides the resource allocation (control zone for being used for PDCCH Domain size).In addition, UE carries out blind estimate to the distribution of PDCCH, for example, checking all effective distribution.Therefore, for passing through CRC Multiple ePDCCH of verification are candidate, and CCE starting index is not identical.

In order to identify most probable candidate, receiver can recompile the DCI message detected and calculate through the school CRC The bit error rate (BER) of all ePDCCH candidate tested.Then, ePDCCH of the UE by selection with minimum BER is candidate.

Position payload size for ePDCCH transmission is determined by polymerization grade multiplied by the product of the position size of e/CCE. If identical single or multiple subsequent e/CCE are shared as leading e/CCE by multiple ePDCCH candidates of different polymerization grades, Depending on code rate and signal-to-noise ratio (SNR) (since decoded robustness is from increase redundancy), these candidate all or subsets can To pass through CRC check.As it is used herein, generating successful CRC check but using the not parameter used in transmitter Blind decoding candidate, which is referred to as, to judge EPDCCH candidate, erroneous judgement EPDCCH by accident or judges by accident candidate.

Fig. 9 shows the candidate phenomenon of erroneous judgement.Equally, the logic arrangement of eCCE (number square), the instruction of eCCE index are each The initial position of eCCE.Four polymerization grade candidate indexes, AL2, AL4, AL8 and AL16 are shown.Each polymerization grade be related to The corresponding length for receiving data of one particular code block, the code block are decoded by UE and crc block are used to test correctness.UE The size of code block or the initial position (eCCE index) of code block are not known.

In AL2, it is right to show 9 eCCE candidates, is expressed as 0-8.In AL4, four eCCE candidate sets are shown, are expressed as 0-3, there are four eCCE for each eCCE candidate set tool.There are two eCCE candidate sets for AL8 tool, and each eCCE candidate set is by eight eCCE Composition.AL16 has an e/CCE candidate set being made of 16 eCCE.

If will with AL8 send PDCCH, received total data ratio with polymerization grade 2 send PDCCH the case where it is long, but It is that the information bit that AL2 is transmitted is not more than AL8 transmission.AL8 transfer ratio AL2 transmission has the superfluous of stronger robustness or more It is remaining.For example, this robustness and redundancy are beneficial to the UE with undesirable signal quality.

Gray area shows the position that AL candidate shares identical starting eCCE index.It is also shown at the top of Fig. 9 indicated ECCE bit sequence by scrambled position in the same manner.Regardless of polymerization grade, the eCCE since eCCE index 0 is identical Ground scrambling.AL2, AL4 and AL8 candidate since eCCE index 8 is also scrambled in the same manner.Because eCCE is scrambled simultaneously in the same manner And different polymerization grade candidates uses identical eCCE starting index, it means that during blind decoding, UE can be in eCCE It indexes and decodes the first two eCCE at 0 and decode first four eCCE at eCCE index 0.If one successfully carries out CRC check, Another one will also succeed.

In other words, it means that not only with the parameter used in transmitter (that is, there is expected polymerization grade) Decoding trial lead to successful CRC check, and can also succeed for the candidate decoding trial using other AL, wherein often A successful decoding includes identical DCI message.

Due to only having leading eCCE to cause ambiguity, the absolute eCCE starting index by the ePDCCH candidate of CRC is phase With, because the starting point of eCCE index is all identical for all polymerization grades.

However, ePDCCH candidate index and polymerization grade are for by CRC and with identical eCCE starting index EPDCCH candidate is different.For such as being designed by the control channel that LTE ePDCCH is defined, tested by what UE was executed based on CRC The blind Detecting of card will lead to correct message detection and correct eCCE starting index detection, but with regard to UE hypothesis by transmitter It may be fuzzy for the AL used.If ePDCCH candidate index or AL are in following 5G specification at receiver Any to be further processed, then ambiguity may cause problem.

Figure 10 is shown applied to multiple ePDCCH candidate with different polymerization grades from 3GPP TS's 36.211 Scramble sequence.In this example, it is assumed that every eCCE is 60.

For example, uniquely scrambling sequence for each AL as do not used for the design of control channel defined in LTE ePDCCH Column.Therefore, identical as the leading part of scrambled signals generated with higher AL for the signal after the scrambling of an AL.For Identical message content, higher AL provide the longer output signal with more redundancies, as shown in Figure 10.Work as receiver-side It, can be to avoid this additional robustness when in the presence of signal conditioning good enough.Therefore, receiver can be by the way that be used only should be compared with The leading part of long sequence is successfully decoded the sequence.It therefore, can be potentially by adopting with the control message that high AL is sent It is decoded with the receiver of lower AL.

Figure 11 is the simplified block diagram that CRC in accordance with some embodiments obscures avoiding method 100.CRC obscures avoiding method 100 Using one or both of scrambling initialization function and hash function both technologies, waited to avoid above-mentioned erroneous judgement ePDCCH Choosing.Scrambling polymerization grade of the initialization function 50 based on transmitted ePDCCH scrambles control information.Which ensure that tool There is the eCCE of different polymerization grades not scrambled in the same manner, so as to avoid the ambiguity at UE.Hash function 150 also based on The polymerization grade of ePDCCH indexes to change eCCE starting.Therefore, the polymerization grade of ePDCCH influences to constitute the compound of ePDCCH The scrambling of eCCE and starting eCCE index.Each of these functions are described below.

In some embodiments, CRC obscure avoiding method 100 by LTE scramble sequence generate specific to the initial of AL Change and passes through ambiguity systematically to remove any CRC of ePDCCH (for example, 5G ePDCCH).It is suitable that CRC obscures avoiding method 100 For any integer polymerization grade.

Scramble initialization function 50

It is saved according to 36.211 6.8A2 of LTE TS, to will be in subframeEPDCCH in (wherein ns is timeslot number) The position b (0) sent on (candidate) ..., b (M_bit- 1) block is scrambled, and scrambled position according to the following formula is generatedBlock:

The example specific to the scramble sequence c (i) of UE is provided in Section 7.2 of 3GPP technical specification 36.211.

Recall, UE can configure there are two gather ePDCCH.Therefore, ePDCCH set number indicates ePDCCH collection It closes.Scrambling sequence generator is initialized using following formula:

Wherein q is ePDCCH set number, and formatePDCCH is the concordance list of the AL of scrambled ePDCCH candidate Show, or more generally:

In some embodiments, AL index expression is defined as formatEPDCCH=log2 (AL).

In some embodiments, CRC obscures the initialization specific to AL that avoiding method 100 is generated using scramble sequence, So that n is unique respectively for any efficient combination of ePDCCH set q and AL or formatePDCCH.Therefore, using adding Disturbing the scrambler sequence that initialization function 50 obtains is unique for each AL.

Although the parameter for ePDCCH is specified in equation (1) and (2), in the case where to avoid erroneous judgement PDCCH, add PDCCH can be applied similarly to by disturbing initialization function 50.

Figure 12 is the scrambling initialization function 50 for showing the fuzzy avoiding method 100 of CRC of Figure 11 in accordance with some embodiments Simplification figure.Scrambling initialization function 50 includes polymerization grade coding unit 60, RRC unit 62, assembled unit 64, initialization value Computing unit 66, Scrambling sequence generator 68 and scrambling unit 70.In the transmission circuit of eNB, AL coding unit 60 will Polymerization grade is converted to function nAL.In some embodiments, AL is converted to nAL, example using logarithmic function by AL coding unit 60 Such as nAL=log₂(AL).RRC unit 62 obtains ePDCCH set number and generates configuration parameter nID.Two parameters nAL and nID It is combined in assembled unit 64, generates parameter nIDAL.In some embodiments, each group for nAL and nID of parameter nIDAL Conjunction is unique.

Timeslot number n_sInitialization value computing unit 66 is fed to together with nIDAL parameter, to generate cINIT.One In a little embodiments, unit 66 uses formula cINIT=floor (n_s/2)*2⁹+nIDAL.CINIT is fed to scramble sequence Device 68, and combine result c with the message digit (b) in scrambling unit 70.Scrambled bit sequence b_SCRIt is scrambling initialization letter The final output of number 50.In some embodiments, formula b_SCR=(b+c) mod 2 is executed by scrambling unit 70 to generate most Terminate fruit.

In some embodiments, scrambling initialization function 50 replaces the scrambling list in scrambling unit 40 or Fig. 6 B in Fig. 6 A Member 80.Therefore, CRC obscures avoiding method 100 and ensures to have same preamble eCCE but multiple ePDCCH candidate with different AL Do not pass through CRC.In some embodiments, by using scrambling initialization function 50, only real ePDCCH candidate will pass through CRC test.In some embodiments, scrambling initialization function 50 is the external control channel receiver of both base station and UE (OCRX) a part.

Hash function 150

It recalls, specifies hash function for PDSCH and ePDCCH to organize for the different polymerizations etc. in search space The sequence and distribution of the e/PDCCH candidate of grade.Figure 11 is returned to, CRC, which obscures avoiding method 100, can also use hash function 150 To avoid erroneous judgement ePDCCH candidate.It is described in more detail below hash function 150.

In some embodiments, hash function 150 is operated using the AL that size is two or more.Using following etc. Formula (3) or equation (4), hash function 150 be designed to the eCCE index of ePDCCH is associated with the polymerization grade of ePDCCH, So that unique eCCE index will be present for each AL.It note that two equatioies all include AL as parameter.

It is 0 to N that wherein l, which is eCCE index and range obtained in search space,_ECCE,p,k-1。Y_p,kIt is index offset, It is static for subframe and depends on ePDCCH set p (for example, if more than one E/PDCCH is configured for passing It is defeated), it is radio network temporary identifier (RNTI) and timeslot number n_sFunction.Parameter k is defined asAnd it is right It should be in subframe numbers.Parameter b is carrier frequency indicator, for example, if in the case where carrier wave polymerization, on one-component carrier wave E/PDCCH transmits the DCI of residual components carrier wave associated with transmission.Parameter m specifies the ePDCCH of practical polymerization grade candidate Index.N_ECCE,p,kIt is the sum of actual ePDCCH set p and the available E/CCE of subframe k.Finally, i is waited with practical ePDCCH The relative indexing (for example, being limited by polymerization grade) of the associated E/CCE of phase selection.

In some embodiments, equation (3) and (4) constitute the search space for the blind decoding at UE receiver.One In a little embodiments, equation (3) and (4) prevent identical E/CCE content candidate by multiple ePDCCH with different polymerization grades Capture.

Although the parameter for ePDCCH is specified in equation (3) and (4), in the case where to avoid erroneous judgement PDCCH, dissipate Array function 150 can be applied similarly to PDCCH.

Figure 13 and Figure 14 is how the hash function 150 of the fuzzy avoiding method 100 of CRC solves the problems, such as erroneous judgement ePDCCH Two examples.

Figure 13 is the wherein Y using the example of equation (3)_p,k=b=0 and N_ECCE,p,k=16.In Figure 13, AL2 is candidate Starting index from E/CCE index 0 be displaced to 1, AL4 candidate starting index from E/CCE index 0 be displaced to 2, AL8 candidate index from E/CCE index 0 is displaced to 4, and AL16 candidate index is displaced to 8 from e/CCE index 0.Grey vertical shading indicates only one A AL candidate occupies each eCCE starting index.ECCE starting index 1 is only the starting eCCE of AL2 candidate；ECCE starting index 2 It is only the starting eCCE of AL candidate AL4, and so on.

Figure 14 is the wherein Y using the example of equation (4)_p,k=b=0 and N_ECCE,p,k=16.In Figure 14, AL2 is candidate Starting index is not shifted from e/CCE index 0, the candidate starting of AL 4 index from E/CCE index 0 be displaced to 1, AL8 candidate index from E/CCE index 0 is displaced to 3, and AL16 candidate index is displaced to 7 from E/CCE index 0.Equally, grey vertical shading indicates only There is an AL candidate to occupy each starting index.

In some embodiments, hash function 150 is the external control channel receiver (OCRX) of both base station and UE A part.

Operating environment

As it is used herein, term " circuit " may refer to the following terms, be the following terms a part or including with Lower items: ASIC, electronic circuit, processor (shared processor, dedicated processes for executing one or more softwares or firmware program Device or group's processor) and/or memory (shared memory, private memory or group memory), combinational logic circuit and/ Or provide other appropriate hardware components of the function.It in some embodiments, can be in one or more softwares or firmware mould Circuit is realized in block, or can realize function associated with circuit by one or more softwares or firmware module.Some In embodiment, circuit may include the logic that can at least partly operate within hardware.

CRC described herein can be obscured avoiding method 100 embodiment realize it is any appropriately configured hard to using In the system of part and/or software.Figure 15 is shown for one embodiment, the example of enhanced NodeB (eNB) base station equipment 800 Component.The combination of the shown component of eNB 800 can also be found in UE.In some embodiments, eNB equipment 800 can wrap Include the application circuit 802 being at least coupled together as shown in the figure, baseband circuit 804, radio frequency (RF) circuit 806, front-end module (FEM) circuit 808 and one or more antenna 810.

Application circuit 802 may include one or more application processor.For example, application circuit 802 may include such as The circuit of (but being not limited to) one or more single or multiple core processor etc.(one or more) processor may include general Any combination of processor and application specific processor (for example, graphics processor, application processor etc.).Processor can be situated between with storage Matter 812 or the coupling of other kinds of storage/memory, and/or may include storage medium 812 or other kinds of storage Device/storage device, and can be configured as execute the instruction that is stored in storage/memory so that various applications and/ Or operating system can be run in system.

Baseband circuit 804 may include the electricity of such as (but not limited to) one or more single or multiple core processors etc Road.Baseband circuit 804 may include one or more baseband processor and/or control logic, to handle connecing from RF circuit 806 The received baseband signal of signal path is received, and generates the baseband signal of the transmission signal path for RF circuit 806.Base-Band Processing Circuit 804 can be connect with application circuit 802 by interface, for generating and handling baseband signal, and for controlling RF circuit 806 operation.For example, in some embodiments, baseband circuit 804 may include the second generation (2G) baseband processor 804A, Three generations's (3G) baseband processor 804B, forth generation (4G) baseband processor 804C, and/or for other existing generations, opening Hair or the generation to be developed in future (for example, the 5th generation (5G), 6G etc.) (one or more) other baseband processor 804D.

Baseband circuit 804 (for example, one or more of baseband processor 804A-D) can handle various wireless electric-controlled Function processed, can be via RF circuit 806 and one or more radio network communications.In some embodiments, scrambling is initial Change a part that function 50 is the external control channel receiver (OCRX) in (one or more) baseband processor 804D. Radio control functions can include but is not limited to signal modulation/demodulation, coding/decoding, radio frequency displacement etc..In some embodiments In, the modulation/demodulation circuit of baseband circuit 804 may include that Fast Fourier Transform (FFT), precoding, and/or constellation reflect Penetrate/demapping function.In some embodiments, the coding/decoding circuit of baseband circuit 804 may include convolution, tail biting convolution, Turbo, Viterbi and/or low-density checksum (LDPC) coder/decoder functionalities.Modulating/demodulating and encoder/decoding The embodiment of device function is not limited to these examples, and in other embodiments may include other suitable functions.

In some embodiments, baseband circuit 804 may include the element of protocol stack, such as the element of EUTRAN agreement, (RLC), packet data convergence protocol are controlled including such as physics (PHY), media access control (MAC), radio link (PDCP) and/or radio resource control (RRC) element.Central processing unit (CPU) 804E of baseband circuit 804 can be matched It is set to the element of operation protocol stack, the signaling for PHY, MAC, RLC, PDCP and/or rrc layer.In some embodiments, base band Circuit may include one or more audio digital signal processors (DSP) 804F.(one or more) audio DSP 804F can It to include the element for compression/de-compression and Echo cancellation, and in other embodiments may include other suitable places Manage element.In some embodiments, the component of baseband circuit can be combined properly in one single chip, in one single chip group, or Person is arranged on same circuit board.In some embodiments, some or all of compositions of baseband circuit 804 and application circuit 802 Component can be realized together, for example, realizing on system on chip (SOC).

In some embodiments, baseband circuit 804 can provide the communication compatible with one or more radio technologies.Example Such as, in some embodiments, baseband circuit 804 can be supported and EUTRAN and/or other wireless MANs (WMAN), wireless office The communication of domain net (WLAN) or wireless personal area network (WPAN).Wherein baseband circuit 804 is configured as supporting more than one wireless association The embodiment of the radio communication of view can be referred to as multi-mode baseband circuit.

The communication realized with wireless network can be used through the modulated electromagnetic radiation of non-solid medium in RF circuit 806. In various embodiments, RF circuit 806 may include switch, filter, amplifier etc., to assist the communication with wireless network. RF circuit 806 may include receiving signal path, may include for carrying out down to from the received RF signal of FEM circuit 808 Frequency conversion simultaneously provides the circuit of baseband signal to baseband circuit 804.RF circuit 806 can also include sending signal path, can be with Baseband signal including providing baseband circuit 804 carries out up-conversion and RF output signal is supplied to FEM circuit 808 to carry out The circuit of transmission.

In some embodiments, RF circuit 806 may include receiving signal path and transmission signal path.RF circuit 806 Reception signal path may include mixer 806A, amplifier circuit 806B and filter circuit 806C.RF circuit 806 Transmission signal path may include filter circuit 806C and mixer 806A.RF circuit 806 can also include synthesis Device circuit 806D, for synthesizing the frequency used by the mixer 806A of reception signal path and transmission signal path.? In some embodiments, the mixer 806A for receiving signal path be can be configured as based on condensating synthesizering circuit 806D offer Frequency synthesis carries out down coversion to from the received RF signal of FEM circuit 808.Amplifier circuit 806B can be configured as to lower change Frequency signal amplifies, and filter circuit 806C can be low-pass filter (LPF) or bandpass filter (BPF), quilt It is configured to remove undesired signal from down-conversion signal to generate output baseband signal.Output baseband signal can be provided To baseband circuit 804 to be further processed.In some embodiments, output baseband signal can be zero-frequency baseband signal, But this is not required.In some embodiments, the mixer 806A for receiving signal path may include passive frequency mixer, But the range of embodiment aspect without being limited thereto.

In some embodiments, the mixer 806A for sending signal path can be configured as based on condensating synthesizering circuit The frequency synthesis that 806D is provided carries out up-conversion to input baseband signal, to generate the RF output signal for being used for FEM circuit 808. Baseband signal can be provided by baseband circuit 804, and can be filtered by filter circuit 806C.Filter circuit 806C can be with Including low-pass filter (LPF), but the range of embodiment aspect without being limited thereto.

In some embodiments, it receives the mixer 806A of signal path and sends the mixer of signal path 806A may include two or more frequency mixers, and can be arranged to quadrature frequency conversion and/or up-conversion respectively.? In some embodiments, the mixer 806A for receiving signal path and the mixer 806A for sending signal path be can wrap Two or more frequency mixers are included, and mirror image can be arranged to and inhibit (for example, Hartley mirror image inhibits).Some In embodiment, the mixer 806A for receiving signal path and the mixer 806A for sending signal path can be distinguished Arrangement is used for Direct-conversion and/or Direct conversion.In some embodiments, the mixer 806A of signal path is received Superhet operation can be configured for the mixer for sending signal path.

In some embodiments, output baseband signal and input baseband signal can be analog baseband signal, but implement The range aspect without being limited thereto of example.In some alternative embodiments, output baseband signal and input baseband signal can be number Baseband signal.In these alternate embodiments, RF circuit 806 may include analog-digital converter (ADC) and digital analog converter (DAC) Circuit, and baseband circuit 804 may include digital baseband interface to communicate with RF circuit 806.

In some dual-mode embodiments, individual radio IC circuit can be provided for handling the letter of each frequency spectrum Number, but the range of embodiment aspect without being limited thereto.

In some embodiments, condensating synthesizering circuit 806D can be fractional N synthesizer or score N/N+1 synthesizer, still The scope of embodiment is unrestricted in this regard, because other kinds of frequency synthesizer may be suitable.For example, synthesizer Circuit 806D can be increment-summation (delta-sigma) synthesizer, frequency multiplier or the conjunction including having the phaselocked loop of frequency divider It grows up to be a useful person.

Condensating synthesizering circuit 806D can be configured as based on frequency input and frequency divider control input and synthesize output frequency So that the mixer 806A of RF circuit 806 is used.In some embodiments, condensating synthesizering circuit 806D can be score N/N+ 1 synthesizer.

In some embodiments, frequency input can be provided by voltage controlled oscillator (VCO), but this is not required.Depend on In desired output frequency, frequency divider control input can be provided by baseband circuit 804 or application processor 802.In some realities It applies in example, frequency divider control input (for example, N) can be determined from look-up table based on the channel indicated by application processor 802.

The condensating synthesizering circuit 806D of RF circuit 806 may include frequency divider, delay phase-locked loop (DLL), multiplexer and Phase accumulator.In some embodiments, frequency divider can be dual-mode frequency divider (DMD), and phase accumulator can be number Word phase accumulator (DPA).In some embodiments, DMD can be configured as input signal divided by N or N+1 (for example, base In carry) to provide division ratio.In some example embodiments, DLL may include one group of cascade adjustable delay member Part, phase detectors, charge pump and D flip-flop.In these embodiments, delay element can be configured as the VCO period It is decomposed into N_dA equal phase is grouped, wherein N_dIt is the quantity of the delay element in delay line.In this way, DLL provide negative-feedback with Assist in ensuring that by the total delay of delay line be a VCO period.

In some embodiments, condensating synthesizering circuit 806D, which can be configured as, generates carrier frequency as output frequency, and In other embodiments, output frequency can be carrier frequency multiple (for example, twice of carrier frequency, carrier frequency four Times), and be used in combination with quadrature generator and divider circuit, there are multiple phases different from each other to generate in carrier frequency Multiple signals of position.In some embodiments, output frequency can be LO frequency (f_LO).In some embodiments, RF circuit 806 It may include IQ/ polarity switch.

FEM circuit 808 may include receive signal path, the reception signal path may include be configured for it is following The circuit of operation: to being operated from one or more received RF signal of antenna 810, amplify received signal and will be received The amplified version of signal is supplied to RF circuit 806 with for further processing.FEM circuit 808 can also include sending signal road Diameter, the transmission signal path may include the circuit for being configured for following operation: amplification is used for by what RF circuit 806 provided The signal of transmission by the one or more in one or more antenna 810 to be transmitted.

In some embodiments, FEM circuit 808 may include TX/RX switch, in sending mode and reception pattern operation Between switch.FEM circuit may include receiving signal path and transmission signal path.The reception signal path of FEM circuit can be with Including low-noise amplifier (LNA), for amplifying received RF signal and providing the reception RF signal of amplification as output (example Such as, it is supplied to RF circuit 806).The transmission signal path of FEM circuit 808 may include for amplify input rf signal (for example, There is provided by RF circuit 806) power amplifier (PA), and for generate for subsequent transmission (for example, pass through one or more day One or more of line 810) RF signal one or more filters.

In some embodiments, eNB equipment 800 may include add ons, for example, storage/memory, display Device, camera, sensor, and/or input/output (I/O) interface.

Various technologies or its some aspects or part, which can take, is embodied in such as floppy disk, CD-ROM, hard disk drive, non- Program code in the tangible medium of transitory computer readable storage medium or any other machine readable storage medium etc The form of (that is, instruction), wherein executed when in the machine that program code is loaded into such as computer etc and by the machine When, which becomes the device for practicing various technologies.It does not include signal that non-transient computer readable storage medium, which can be, Computer readable storage medium.In the case of program code execution on programmable computers, calculating equipment may include place Manage device, can by processor read storage medium (including volatile and non-volatile memory and or memory element), at least one A input equipment and at least one output equipment.Volatile and non-volatile memory and or memory element can be RAM, EPROM, flash drive, CD drive, magnetic hard drive, solid state drive or for store electronic data other Medium.Node and wireless device can also include transceiver module, computer module, processing module and/or clock module or fixed When device module.It may be implemented or application programming can be used using one or more programs of various techniques described herein Interface (API), reusable control etc..These programs can be realized with the programming language of level process or object-oriented, in terms of Calculation machine system communication.However, if it is desired to which these programs can be realized with assembler language or machine language.Under any circumstance, The language can be compiling or interpretative code, and combine with hardware realization.

It should be understood that many functional units described in specification have been marked as module, so as to more specifically strong Adjust their realization independence.For example, module can be implemented as hardware circuit, including customization VLSI circuit or gate array, such as Ready-made semiconductor, transistor or other discrete components of logic chip etc.Module can also be in such as field-programmable gate array It is realized in the programmable hardware device of column, programmable logic array, programmable logic device etc.

Module can also use software realization, for the execution of various types of processors.The executable code module example of identification It such as may include one or more physical or logic blocks of computer instruction, the computer instruction can be for example organized as pair As, process or function.It however, the executable file of the module of identification can physically be not together, but may include storage In the different instruction of different location, these instructions constitute module and realize the described of module when being joined logically together Purpose.

In fact, the module of executable code can be single instruction perhaps multiple instructions, it might even be possible to be distributed in it is several not On same code segment, in different programs and on several memory devices.Similarly, operation data can be herein In be identified and show in module, and can be embodied as in any suitable form and be organized in any suitable type Data structure in.Operation data can be used as individual data collection and be collected, or on the different location that can be distributed in (including It is distributed in different storage device), and the electronic signal that can be at least partially, merely as on system or network exists.Module It can be passive or active, the agency of required function executed including that can operate.

Mean a particular feature, structure, or characteristic quilt for combining the example to describe to the reference of " example " through this specification It is included at least one embodiment.Therefore, through this specification it is each place occur phrase " in one example " or " in some embodiments " it is not necessarily all referring to the same embodiment.

As it is used herein, for convenience, multiple projects, structural element, composition can be presented in common list Original part and/or material.But these lists it should be understood that each member in list be identified separately to be independent and Unique member.Therefore, it is indicate on the contrary in the case where, any independent members in such list should not be based only upon it with On the fact that any other member in same list appears in a common group and is interpreted any other described member Equivalent.In addition, the alternative solution of various embodiments and example and its various assemblies can be referred to herein.It should manage Solution, these embodiments, example and alternative solution be not necessarily to be construed as mutual actual equivalent, and should be regarded as individually and Autonomous expression.In addition, described feature, structure or characteristic can be in one or more embodiments with any suitable sides Formula combination.

Generally speaking, CRC can be implemented in the device of enhancement mode node B (eNB) and obscure avoiding method, the eNB's Device includes: radio circuit, is couple to one or more antenna, and the antenna sends signal by cellular network；One or Multiple processors are used to execute instruction, and described instruction by one or more of processors when being executed, so that the eNB Execute following operation: by the polymerization grade of enhanced physical downlink control channel (ePDCCH) and control channel element (CCE) index is associated, and the polymerization grade instruction constitutes the quantity of the CCE of the ePDCCH, and the CCE is by using institute It states index to be addressed, wherein the index is unique for the ePDCCH.

Other than the first example or any other example being discussed herein, in the second example, the device of the eNB The hash function of the polymerization grade including the ePDCCH is further used to generate the index.

Other than first or second example or any other example being discussed herein, in third example, the eNB Device further use the index generated with minor function:

Wherein AL is the polymerization grade, n_sIt is timeslot number, l is the index and range is 0 to N_ECCE,p,k- 1, Y_p,k It is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe number, b is carrier frequency Indicator, m specify the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is that actual ePDCCH set p and subframe k can The sum of CCE, and i is and the relative indexing of the candidate associated CCE of ePDCCH.

Other than the second example or any other example being discussed herein, in the fourth example, the device of the eNB It further uses and the index is generated with minor function:

Enhanced control channel element (eCCE) scrambled in addition it is possible to implement the CRC obscures avoiding method, The described method includes: being compiled to the polymerization grade of one or more enhanced physical downlink control channels (ePDCCH) Code, the ePDCCH includes down link control information (DCI), and one or more of ePDCCH are by the one of occupancy air interface A or multiple decoding terminals, the DCI are attached through CRC, encode, rate-matched, generate the eCCE；And using encoded Polymerization grade scrambles the eCCE.

Other than the 5th example or any other example being discussed herein, in the 6th example, the method is generated Initialization value to be received to Scrambling sequence generator, wherein the polymerization etc. of the initialization value based on the ePDCCH Grade.

Other than the 5th or the 6th example or any other example being discussed herein, in the 7th example, the side Method manipulates the polymerization grade of the ePDCCH using function.

Other than the 7th example or any other example being discussed herein, in the 8th example, the function is pair Number function.

Other than the 6th or the 7th example or any other example being discussed herein, in the 9th example, the side Method according to the set of the ePDCCH generate configuration parameter, wherein the configuration parameter combined with the polymerization grade manipulated with Form new parameter.

Other than the 9th example or any other example being discussed herein, in the tenth example, the new parameter pair Each combination of configuration parameter and the polymerization grade manipulated is unique.

Other than the tenth example or any other example being discussed herein, in the 11st example, the method makes With the new parameter and the timeslot number of the downlink subframe including one or more of ePDCCH calculates the initialization Value.

Other than the 5th example or any other example being discussed herein, in the 12nd example, the method exists Coding and Scrambling Operation are executed in the external control channel receiver of transmitter.

Other than the 12nd example or any other example being discussed herein, in the 13rd example, the method Coding and Scrambling Operation are executed in the transmitter with long term evolution ability.

In addition, the fuzzy avoiding method of the CRC can be in the following manner to the downlink control in downlink subframe Information (DCI) processed is encoded: using dissipating for the polymerization grade including enhanced physical downlink control channel (ePDCCH) Array function indexes to generate enhanced control channel element (eCCE), and the ePDCCH includes multiple eCCE, the multiple eCCE Starting identified by the eCCE index, the quantity of the eCCE in the ePDCCH corresponds to the polymerization grade of the ePDCCH, Wherein, the eCCE index is unique for the ePDCCH.

Other than the 14th example or any other example being discussed herein, in the 15th example, the method The eCCE index is generated using with minor function:

Wherein AL is the polymerization grade, n_sIt is timeslot number, l is the eCCE index and range is 0 to N_ECCE,p,k- 1, Y_p,kIt is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe number, b is carrier frequency Rate indicator, m specify the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is actual ePDCCH set p and subframe k The sum of available eCCE, and i is and the relative indexing of the candidate associated eCCE of ePDCCH.

Other than the 15th example or any other example being discussed herein, in the 16th example, the method The eCCE index is generated using with minor function:

In addition, the fuzzy avoiding method of the CRC can be to one or more physical downlink control channels (PDCCH) The polymerization grade of PDCCH is encoded, and the PDCCH includes down link control information (DCI), one or more of PDCCH is by one or more decoding terminals of occupancy air interface, and the DCI is attached through CRC, coding, rate-matched and polymerization, Generate the CCE；And the CCE is scrambled using encoded polymerization grade.

Other than the 17th example or any other example being discussed herein, in the 18th example, the method The initialization value to be received to Scrambling sequence generator is generated, wherein the initialization value is based on the described poly- of the PDCCH Close grade.

Other than the 18th example or any other example being discussed herein, in the 19th example, the method The polymerization grade of the PDCCH is manipulated using function.

In addition, the CRC obscures avoiding method can realize that the device includes for executing institute as above in a kind of device The device of any one of the 5th to the 19th example stated.

In addition, the CRC obscures avoiding method can realize in the article for including computer-readable medium, the calculating Machine readable medium includes instruction, and described instruction by the one or more processors of electronic equipment when being executed, so that the electronics Equipment executes any one of the 5th to the 19th example as described above.

In addition, the CRC obscures avoiding method can realize in the computer-readable medium for including instruction, described instruction When being executed by the one or more processors of electronic equipment, so that the electronic equipment performs the following operation: using including increasing The hash function of the polymerization grade of strong type physical downlink control channel (ePDCCH) generates enhanced control channel element (eCCE) it indexes, the ePDCCH includes multiple eCCE, and the starting of the multiple eCCE is identified by the eCCE index；Wherein, The hash function is following one of both:

Or

Wherein, wherein AL is the polymerization grade, n_sIt is timeslot number, l is the eCCE index and range arrives for 0 N_ECCE,p,k- 1, Y_p,kIt is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe to compile Number, b is carrier frequency indicator, and m specifies the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is actual ePDCCH The sum of set p and the available eCCE of subframe k, and i is and the relative indexing of the candidate associated eCCE of ePDCCH.

In addition, the CRC obscures avoiding method by following operation come to enhanced control channel member in the 5th example Plain (eCCE) is scrambled: being carried out to the polymerization grade of one or more enhanced physical downlink control channels (ePDCCH) Coding, the ePDCCH includes down link control information (DCI), and one or more of ePDCCH are by occupancy air interface One or more decoding terminals, the DCI are attached through CRC, encode, rate-matched, generate the eCCE；And coded by use Polymerization grade the eCCE is scrambled.

Other than the 5th example or any other example being discussed herein, in the 6th example, the method is into one Step generates the initialization value to be received to Scrambling sequence generator, wherein the initialization value is based on described in the ePDCCH Polymerization grade.

Other than the 5th or the 6th example or any other example being discussed herein, in the 7th example, the side Method further uses function to manipulate the polymerization grade of the ePDCCH.

Other than the 6th or the 7th example or any other example being discussed herein, in the 9th example, the side Method further generates configuration parameter according to the set of the ePDCCH, wherein the configuration parameter and the polymerization grade manipulated Combination is to form new parameter.

Other than the tenth example or any other example being discussed herein, in the 11st example, the method into The timeslot number of downlink subframe of one step using the new parameter and including one or more of ePDCCH is described to calculate Initialization value.

Other than the 12nd example or any other example being discussed herein, in the 13rd example, the method Coding and Scrambling Operation are further executed in the transmitter with long term evolution ability.

In addition, the CRC obscures avoiding method in the following manner in downlink subframe in the 14th example Down link control information (DCI) is encoded: using poly- including enhanced physical downlink control channel (ePDCCH) The hash function of grade is closed to generate enhanced control channel element (eCCE) index, the ePDCCH includes multiple eCCE, institute The starting for stating multiple eCCE is identified by the eCCE index, and the quantity of the eCCE in the ePDCCH is corresponding to the ePDCCH's Polymerization grade, wherein the eCCE index is unique for the ePDCCH.

Other than the 14th example or any other example being discussed herein, in the 16th example, the method The eCCE index is generated using with minor function:

In addition, the CRC obscures avoiding method in the following manner to control channel element in the 17th example (CCE) it is scrambled: the polymerization grade of the PDCCH of one or more physical downlink control channels (PDCCH) is compiled Code, the PDCCH include down link control information (DCI), and one or more of PDCCH are by one of occupancy air interface Or multiple decoding terminals, the DCI generate the CCE through CRC attachment, coding, rate-matched and polymerization；And using being compiled The polymerization grade of code scrambles the CCE.

In addition, the CRC obscures avoiding method and operates in a kind of device in the 20th example, which includes using In the device for executing any one of the 5th to the 19th example.

In addition, the CRC is obscured avoiding method in the article for including computer-readable medium in the 21st example Operation, the computer-readable medium include instruction, described instruction by electronic equipment one or more processors execute when, So that the electronic equipment executes any one of the 5th to the 19th example.

In addition, the CRC is obscured avoiding method in the computer-readable medium for including instruction in the 22nd example Operation, described instruction by the one or more processors of electronic equipment when being executed, so that the electronic equipment carries out following behaviour Make: enhanced to generate using the hash function of the polymerization grade including enhanced physical downlink control channel (ePDCCH) Control channel element (eCCE) index, the ePDCCH includes multiple eCCE, and the starting of the multiple eCCE is by the eCCE rope Tendering is known；Wherein, the hash function is following one of both:

Or

Wherein, wherein AL is the polymerization grade, n_sIt is timeslot number, l is the eCCE index and range arrives for 0 N_ECCE,p,k- 1, Y_p,kIt is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe number, B is carrier frequency indicator, and m specifies the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is actual ePDCCH collection The sum of p and the available eCCE of subframe k are closed, and i is and the relative indexing of the candidate associated eCCE of ePDCCH.

Although aforementioned exemplary is the explanation to the principle in one or more specific applications, skill common for this field For art personnel it is readily apparent that can by way of not in the case where creativity to realization, use and details into The a variety of modifications of row, and the principle and concept of this paper is not departed from, and will therefrom understand many modifications and variations.Appended right is wanted It asks and is intended to cover all such modifications and variations fallen into the true spirit and range of disclosed embodiment.

Claims

1. a kind of device of enhancement mode node B (eNB), comprising:

Radio circuit, is couple to one or more antenna, and the antenna sends signal by cellular network；

One or more processors are used to execute instruction, and described instruction makes when being executed by one or more of processors It obtains the eNB and executes following operation:

By the index phase of the polymerization grade of enhanced physical downlink control channel (ePDCCH) and control channel element (CCE) Association, the polymerization grade instruction constitute the quantity of the CCE of the ePDCCH, and the CCE is addressed by using the index；

Wherein, the index is unique for the ePDCCH.

2. the device of eNB according to claim 1, the eNB further,

The index is generated using the hash function of the polymerization grade including the ePDCCH.

3. the device of eNB according to claim 1 or 2, the eNB further,

The index is generated using with minor function:

Wherein AL is the polymerization grade, n_sIt is timeslot number, l is the index and range is 0 to N_ECCE,p,k- 1, Y_p,kIt is rope Draw offset, depend on ePDCCH set p, k is defined asAnd correspond to subframe number, b is carrier frequency instruction Symbol, m specify the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is that actual ePDCCH set p and subframe k are available The sum of CCE, and i is and the relative indexing of the candidate associated CCE of ePDCCH.

4. the device of eNB according to claim 2, the eNB further,

The index is generated using with minor function:

5. a kind of carry out scrambled method to enhanced control channel element (eCCE), which comprises

The polymerization grade of one or more enhanced physical downlink control channels (ePDCCH) is encoded, it is described EPDCCH includes down link control information (DCI), and one or more of ePDCCH are by one or more of occupancy air interface A decoding terminals, the DCI are attached through CRC, encode, rate-matched, generate the eCCE；And

The eCCE is scrambled using encoded polymerization grade.

6. according to the method described in claim 5, further comprising:

The initialization value to be received to Scrambling sequence generator is generated, wherein institute of the initialization value based on the ePDCCH State polymerization grade.

7. method according to claim 5 or 6, further comprises:

The polymerization grade of the ePDCCH is manipulated using function.

8. according to the method described in claim 7, wherein, the function is logarithmic function.

9. method according to claim 6 or 7, further comprises:

Configuration parameter is generated according to the set of the ePDCCH；

Wherein, the configuration parameter is combined with the polymerization grade manipulated to form new parameter.

10. according to the method described in claim 9, wherein, the new parameter is to configuration parameter and the polymerization grade manipulated Each combination is unique.

11. according to the method described in claim 10, further comprising:

Using the new parameter and the timeslot number of the downlink subframe including one or more of ePDCCH is described to calculate Initialization value.

12. according to the method described in claim 5, further comprising:

Coding and Scrambling Operation are executed in the external control channel receiver of transmitter.

13. according to the method for claim 12, further comprising:

Coding and Scrambling Operation are executed in the transmitter with long term evolution ability.

14. the method that the down link control information (DCI) in a kind of pair of downlink subframe is encoded, the method packet It includes:

Enhancing is generated using the hash function of the polymerization grade including enhanced physical downlink control channel (ePDCCH) Type control channel element (eCCE) index, the ePDCCH includes multiple eCCE, and the starting of the multiple eCCE is by the eCCE Index identifies, and the quantity of the eCCE in the ePDCCH corresponds to the polymerization grade of the ePDCCH；

Wherein, the eCCE index is unique for the ePDCCH.

15. according to the method for claim 14, further comprising:

The eCCE index is generated using with minor function:

Wherein AL is the polymerization grade, n_sIt is timeslot number, l is the eCCE index and range is 0 to N_ECCE,p,k- 1, Y_p,k It is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe number, b is carrier frequency Indicator, m specify the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is that actual ePDCCH set p and subframe k can The sum of eCCE, and i is and the relative indexing of the candidate associated eCCE of ePDCCH.

16. according to the method for claim 14, further comprising:

The eCCE index is generated using with minor function:

17. a kind of pair of control channel element (CCE) carries out scrambled method, which comprises

The polymerization grade of the PDCCH of one or more physical downlink control channels (PDCCH) is encoded, it is described PDCCH includes down link control information (DCI), one or more of PDCCH by occupancy air interface one or more Decoding terminals, the DCI generate the CCE through CRC attachment, coding, rate-matched and polymerization；And

The CCE is scrambled using encoded polymerization grade.

18. according to the method for claim 17, further comprising:

The initialization value to be received to Scrambling sequence generator is generated, wherein institute of the initialization value based on the PDCCH State polymerization grade.

19. according to the method for claim 18, further comprising:

The polymerization grade of the PDCCH is manipulated using function.

20. a kind of device, the device including requiring any one of 5-19 for perform claim.

21. a kind of article including computer-readable medium, the computer-readable medium includes instruction, and described instruction is electric When the one or more processors of sub- equipment execute, so that the electronic equipment perform claim requires any one of 5-19.

22. a kind of computer-readable medium including instruction, described instruction are held by the one or more processors of electronic equipment When row, so that the electronic equipment performs the following operation:

Enhancing is generated using the hash function of the polymerization grade including enhanced physical downlink control channel (ePDCCH) Type control channel element (eCCE) index, the ePDCCH includes multiple eCCE, and the starting of the multiple eCCE is by the eCCE Index mark；

Wherein, the hash function is following one of both:

Or

Wherein, wherein AL is the polymerization grade, n_sIt is timeslot number, l is the eCCE index and range is 0 to N_ECCE,p,k- 1, Y_p,kIt is index offset, depends on ePDCCH set p, k is defined asAnd correspond to subframe number, b is carrier wave Frequency indicator, m specify the ePDCCH candidate index of actual polymerization grade, N_ECCE,p,kIt is actual ePDCCH set p and son The sum of the available eCCE of frame k, and i is and the relative indexing of the candidate associated eCCE of ePDCCH.