WO2013155832A1

WO2013155832A1 - Signal sending method and device

Info

Publication number: WO2013155832A1
Application number: PCT/CN2012/083931
Authority: WO
Inventors: 吴强; 刘江华; 高驰; 李超君; 周永行
Original assignee: 华为技术有限公司
Priority date: 2012-04-19
Filing date: 2012-11-01
Publication date: 2013-10-24
Also published as: CN103379632A; CN103379632B

Abstract

Disclosed are a signal sending method and device. The method comprises: according to the number of enhanced control channel elements (eCCEs) occupied by an enhanced physical downlink control channel (E-PDCCH), acquiring a scrambling code sequence corresponding to the E-PDCCH; scrambling a signal borne by the E-PDCCH by using the corresponding scrambling code sequence; and sending the scrambled signal to a receiving apparatus. By means of the present invention, decoding errors in blind detection can be avoided by scrambling a sequence to facilitate decoding.

Description

Signal transmitting method and device

The present application claims priority to Chinese Patent Application No. 201210118183.8, entitled "A Signal Transmission Method and Apparatus", filed on April 19, 2012, the entire contents of . Technical field

The present invention relates to the field of wireless communications, and in particular, to a signal transmitting method and apparatus. Background technique

In the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) / LTE Advanced Evolution (LTE-Advanced, LTE-A) system, the downlink multiple access method is usually orthogonal. Orthogonal Frequency Division Multiple Access (OFDMA). The downlink resources of the system are divided into Orthogonal Frequency Division Multiple (OFDM) symbols in terms of time, and are divided into subcarriers in terms of frequency.

According to the LTE Release 8/9/10 standard, a normal downlink subframe contains two slots (slots), and each slot has 7 OFDM symbols. The size of the Resource Block (RB) is defined. One RB contains 12 subcarriers in the frequency domain and half of the subframe duration (one time slot) in the time domain, that is, contains 7 or 6 OFDM symbols. A subcarrier within an OFDM symbol is called a Resource Element (RE), so an RB contains 84 or 72 REs. On one subframe, a pair of RBs of two slots is called a resource block pair, that is, an RB pair.

The various data carried on the subframe are organized by mapping various physical channels on the physical time-frequency resources of the subframe. The various physical channels can be roughly divided into two categories: control channels and traffic channels. Correspondingly, the data carried by the control channel may be referred to as control data (or control information), and the data carried by the traffic channel may be referred to as service data.

The Physical Downlink Control Channel (PDCCH) is A type of control channel. In version 10 and the previous LTE system, the PDCCH and the Physical Downlink Shared Channel (PDSCH) are time-division in one subframe, and PDCCH 7 is carried in the first n symbols of one subframe, and n can be 1 One of 2, 3, 4, in the frequency domain, is interleaved and then spread to the entire system bandwidth to obtain a frequency diversity gain; the scheduled downlink data is from the n+1th of the subframe The symbol begins to map.

The user equipment (User Equipment, UE) is based on a cell-specific reference signal, such as a Common Reference Signal (CRS), in the search space of the PDCCH according to the payload size and aggregation level of the PDCCH (there are four aggregation levels, ie, 1 , 2, 4, and 8) After the PDCCH is demodulated and decoded, the UE-specific Radio Network Temporary Identity (RNTI) is used to descramble the Cyclic Redundancy Check (CRC). The UE's own PDCCH is determined and determined, and the scheduled data is received or sent according to the scheduling information in the PDCCH. A complete PDCCH consists of one or several Control Channel Elements (CCEs). A CCE consists of 9 Resource Element Groups (REGs), and a REG occupies 4 REs. According to LTE Release 8/9/10, one PDCCH can consist of 1, 2, 4 or 8 CCEs.

For the PDSCH and the PDCCH transmitted in one subframe, the user equipment first needs to perform blind detection of the PDCCH, that is, the PDCCH corresponding to the PDCCH is detected from all the CCEs. If the PDCCH is detected correctly, the user equipment then demodulates the corresponding PDSCH according to the information in the PDCCH. According to the correctness of PDSCH demodulation, the user equipment needs to perform feedback on the uplink. If the PDSCH is correctly demodulated, the user equipment feeds back the ACK to the eNB, indicating that the user equipment has correctly received the data sent by the eNB, and the eNB may perform the transmission of the new data block; otherwise, the user equipment feeds back the NACK to the base station (eNodeB, eNB), indicating The data is not received correctly, and the eNB needs to retransmit the data.

The ACK/NACK feedback is performed by means of code division multiplexing on the Physical Uplink Control Channel (PUCCH), that is, each user equipment performs ACK/NACK through a sequence of time-frequency two-dimensional spread spectrum. Modulation transmission. Where, for each dynamic scheduling The resource (or sequence) in which the ACK/NACK is transmitted in the uplink is implicitly determined by the sequence number of the first CCE of its PDCCH.

In the PDCCH of the pair, each PDCCH is composed of K CCEs, and the user equipment is required to perform blind detection. Since the control information in the PDCCH is obtained by convolutional coding of the primary code of 1/3 and rate matching based on the cyclic buffer, when the coding rate is less than 1/3, different logical units may contain the same control. information.

At this time, the ambiguity detected by the logical unit may cause a problem that the ACK/NACK resource determined by the user equipment is ambiguous.

In the LTE system after version 10, the PDCCH is transmitted based on the MIMO precoding method, and the PDCCH may be demodulated based on the UE-specific reference signal, which is called an enhanced PDCCH (E-PDCCH), and the CCE is composed of the CCE. It is eCCE. The above problem also exists in the E-PDCCH, causing a decoding error. Summary of the invention

A technical problem to be solved by embodiments of the present invention is to provide a signal transmitting method and apparatus. The scrambling sequence is used to assist in decoding, avoiding decoding errors in blind detection.

In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides a signal sending method, including:

Acquiring the scrambling code sequence corresponding to the E-PDCCH according to the number of control channel units eCCE occupied by the enhanced physical downlink control channel E-PDCCH;

And scrambling the signal carried by the E-PDCCH by using the corresponding scrambling code sequence;

The scrambled signal is sent to the receiving device.

On the other hand, an embodiment of the present invention further provides a signal receiving method, including:

Acquiring a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel units eCCE occupied by the candidate enhanced physical downlink control channel E-PDCCH; Receiving a signal sent by the transmitting device;

The signal is blindly detected using the scrambling code sequence.

On the other hand, an embodiment of the present invention further provides a signal sending apparatus, including:

a scrambling code obtaining unit, configured to acquire a scrambling code sequence corresponding to the E-PDCCH according to the number of control channel units eCCE occupied by the enhanced physical downlink control channel E-PDCCH;

And a scrambling unit, configured to scramble the signal carried by the E-PDCCH by using the corresponding scrambling code sequence;

And a scrambling transmitting unit, configured to send the scrambled signal to the receiving device.

On the other hand, an embodiment of the present invention further provides a signal receiving apparatus, including:

a scrambling code unit, configured to acquire a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel unit eCCEs occupied by the candidate enhanced physical downlink control channel E-PDCCH;

a signal receiving unit, configured to receive a signal sent by the sending device;

And a detecting unit, configured to perform blind detection on the signal by using the scrambling code sequence.

Embodiments of the present invention have the following beneficial effects:

When the E-PDCCH signal is transmitted, the signal is scrambled according to the scrambling sequence related to the number of eCCEs, so that when the signal receiving end performs blind detection, only the number and actual number of eCCEs of the set E-PDCCH are set. If it matches, it can be decoded correctly. Otherwise, a decoding error will occur. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely some embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic diagram of an E-PDCCH resource allocation situation when a decoding error occurs in the prior art; FIG. 2 is a schematic diagram of a specific process of a signal sending method in an embodiment of the present invention; FIG. 3 is another schematic flowchart of a signal sending method in an embodiment of the present invention;

5 is a schematic diagram of obtaining a scrambling code sequence corresponding to each aggregation level in the embodiment of the present invention; FIG. 6 is a schematic diagram of a scrambling code sequence obtained by cyclic shift in the embodiment of the present invention;

7 is a schematic diagram of a multi-pass cyclic shift obtaining scrambling code sequence in an embodiment of the present invention;

FIG. 8 is a schematic diagram showing a sequence of obtaining a scrambling code when the eCCE in the search space is an integer multiple in the embodiment of the present invention; FIG.

9 is a schematic diagram of a specific process of a signal receiving method in an embodiment of the present invention;

10 is a schematic diagram of a specific composition of a signal sending apparatus according to an embodiment of the present invention; FIG. 11 is a schematic diagram of a specific composition of the scrambling code acquiring unit of FIG.

Figure 12 is a block diagram showing a specific composition of a signal receiving apparatus in an embodiment of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

In the E-PDCCH, each E-PDCCH is still an integer of Mi (i is 0, 1 , 1-1, where i represents an aggregation level, and I represents an aggregation level, which may be 1 . 2, 4, 8) A logical unit similar to CCE, requiring user equipment for blind detection. The control information in the E-PDCCH is obtained by convolutional coding with a PDCCH-like mother code of 1/3 and rate matching based on a cyclic buffer. If the E-PCCCH is transmitted in a continuous RB pair area with the PDSCH, there will be a problem.

In the embodiment of the present invention, the logical unit of the E-PDCCH is defined as an eCCE. As shown in Figure 1, Assuming a resource allocation of type 0, one RBG has three RB pairs, and within one RB pair, there are two eCCEs. The E-PDCCH is sent to a certain UE using 4 eCCEs (corresponding to aggregation level 4) (ie, the correct aggregation level is aggregation level 4). This E-PDCCH occupies two RB pairs, and RB pairs numbered 0 and 1 in RBG0. The resources allocated by the PDSCH are resources other than the E-PDCCH in RBG0 and RBG1, that is, RB pairs numbered 2, 3, 4, and 5. On the UE side, in the blind detection of E-PDCCH, if only aggregation level 2 (aggregation level 2 includes two eCCEs, one RB is occupied) is correctly decoded (due to the mother code convolutional coding, four eCCEs may be caused. The content of the last two is the same as the content of the first two, so that only the aggregation level 2 is correctly decoded. The UE will consider the PDSCH to be the RB pair numbered 1, 2, 3, 4, 5, but actually This will cause a decoding error in the PDSCH.

It should be noted that the above "typeO resource allocation" is one of the resources allocation to the PDSCH in the prior art. The resource allocation to the PDSCH includes: Type O (Type 0), Type 1 (Type 1) and Type 2 (Type 2) resource allocation methods. The resource allocation of type 0 is allocated by a resource block group (RBG); the resource allocation of type 1 is resource allocation in units of RB pairs by means of a bit bitmap; Type 2 resource allocation is a continuous resource allocation.

That is, when there is an E-PDCCH in the RBG allocated to the PDSCH, the number of logical units of different eCCEs transmitting the E-PDCCH may cause coding ambiguity, causing the UE to determine the frequency domain resource error used by the PDSCH, and finally Caused a decoding error.

Based on the above findings, the embodiment of the present invention proposes a solution for generating a scrambling code sequence for E-PDCCH, which is related to different aggregation levels (or the number of different eCCEs of the E-PDCCH). In a particular embodiment, an initial scrambling sequence can be formed, and the scrambling code for the E-PDCCH is derived from the scrambling sequence starting from a different shift or cyclic shift. The embodiments are described below in detail.

As shown in FIG. 2, it is a specific process diagram of a signal sending method in an embodiment of the present invention. The process includes the following steps:

101. Acquire a scrambling code sequence corresponding to the E-PDCCH according to the number of eCCEs occupied by the E-PDCCH.

In a preferred embodiment, the number of eCCEs occupied by the E-PDCCH is different from the aggregation level of the E-PDCCH, and the scrambling code sequences corresponding to the E-PDCCHs of at least two different aggregation levels are different. In another preferred embodiment, the sequence of the E-PDCCHs of different aggregation levels is different.

It should be noted that, in a preferred embodiment, in the scrambling code sequence corresponding to the E-PDCCH of the at least two different aggregation levels, the interference corresponding to the E-PDCCH with a higher aggregation level is required. The first M codewords of the code sequence are different from the codewords of the scrambling code sequence corresponding to the E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the E-PDCCH of the lower aggregation level. The corresponding scrambling code sequences have the same length. In other words, the "number of eCCEs according to the E-PDCCH" in the embodiments of the present invention refers not only to the length of the scrambling code sequence to match the number of eCCEs occupied by the E-PDCCH, but also to at least two E-PDCCHs. When the number of eCCEs occupied is different, the sequence content of the corresponding scrambling code sequence is also different.

For example, suppose one eCCE occupies 100 bits and two eCCEs occupy 200 bits; then the corresponding scrambling code sequence should also be 100 bits and 200 bits, respectively, but in each embodiment of the present invention, one eCCE The corresponding 100-bit scrambling sequence is also different from the first 100 bit sequences of the 200-bit scrambling sequence corresponding to the two eCCEs. For another example, assume that one eCCE occupies 100 bits, two eCCEs occupy 200 bits, four eCCEs occupy 400 bits, and eight eCCEs occupy 800 bits; then the scrambling code corresponding to the E-PDCCH of four eCCEs The sequence is different from the first 400 bits of the scrambling code sequence corresponding to the E-PDCCH occupying 8 eCCEs. At the same time, the scrambling code sequence corresponding to the E-PDCCH occupying one eCCE is the same as the first 100 bits of the scrambling code sequence corresponding to the E-PDCCH occupying two eCCEs.

The number of eCCEs may correspond to an aggregation level of the E-PDCCH. This step can be specifically Obtaining: an initial scrambling code sequence; acquiring, according to the aggregation level of the E-PDCCH, a scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence, where the initial scrambling code of different aggregation levels The content and length of the sequence may be independent of the specific aggregation level of the current E-PDCCH. The different aggregation levels may also be at least two different aggregation levels of the aggregation level supported by the base station or the user, that is, the scrambling code sequence corresponding to the EPDCCH of at least two different aggregation levels is in the The starting position in the initial scrambling sequence is different.

The initial scrambling code sequence length may be determined in advance, that is, the initial scrambling code sequence for acquiring the E-PDCCH may be: obtaining an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device.

Correspondingly, obtaining the scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence may be: cyclically reading the initial scrambling code sequence to obtain a scrambling code sequence corresponding to the E-PDCCH.

Of course, the initial scrambling code length may also be determined in the above manner, and an initial scrambling code sequence is determined based on experience and the like. Then, corresponding scrambling code sequences are obtained from different starting positions in the sequence according to the aggregation level. If the initial scrambling code sequence is sufficiently long, when the corresponding scrambling code sequence is obtained from different starting positions in the sequence according to the aggregation level, the corresponding long scrambling code is obtained according to the number of bits of the aggregation level from the corresponding starting position. The sequence may be; if the initial scrambling sequence is not long enough, the initial scrambling sequence may be cyclically repeated from the corresponding starting position to obtain a corresponding scrambling sequence.

Further, in order to reduce the decoding error as much as possible, in the above process, when the scrambling code sequence is determined, when the aggregation level of the E-PDCCH is different, the scrambling code sequence corresponding to the E-PDCCH of different aggregation levels is used. The starting position, the sequence length of the interval between the starting positions is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

Optionally, the step may further be: generating, by the base station or at least two different aggregation levels supported by the user equipment, different initial scrambling code sequences, from the generated initial interference The scrambling code sequence corresponding to the E-PDCCH is obtained in the code sequence. For example, for at least two different aggregation levels of the aggregation level supported by the base station or the user equipment, the initialization of the scrambling code is different, that is, a different c _mit c _mit may be a function of an aggregation level, or according to an aggregation level. Define different c _mit generation functions. Specifically:

^^k^+^ + X, or

c _init = n .2 ^ml + q.2 ^m2 + n _s 12J.2" ¹³ + N _ro + f(L) , or

n^ .2 ^ml + q.2 ^m2 +[n _s /2".2^ + N _ro +X ₁ for the first aggregation level

... , or η^ 2 ^nd + q.2 ^m2 + n _s /2".2 ^m3 + N _ro +X _n for the nth aggregation level

c _tait = n .2^ + q.2 ^m2 + ^ 12".2 ^m3 + N _ro + X , or c _init = (Ln _s 12" + D(2 · N _ro + l).2 ^ml + n . 2 ^m2 + X where is the slot number; is the radio network temporary identifier; ^N m is the identifier of the cell or virtual cell where the user equipment is located, and the radio network temporary identifier (for example, C-RNTI SPS C-RNTL Temporary C-RNTI, etc.) And at least one of the parameters used by the user equipment to generate the DMRS sequence; ml, m2, m3 are non-negative integers, q is equal to 0 or 1; and values of X are different for at least two different aggregation levels. X is 2 ^m xf(L) , where f(L) is a function of aggregation level L; or X is a non-zero integer, and the values of X are different for at least two different aggregation levels. By way of example, X can be 2 ^m xL or 2 ^m xlo _g 2 (L) or 2 ^m xp or 2 ^m xceil (L/2), where p is a non-negative integer and for at least two different aggregation levels, P The value is also different. XX _n is a value corresponding to the first aggregation level, ..., the nth aggregation level, respectively. ^{Χ ι,} may be 0, 1, ... such non-negative integer, and may be 2 ^m xp, e.g.

2 ⁹ xl0,2 ⁹ xll,2 ⁹ xl2,2 ⁹ xl3,2 ⁹ xl4,2 ⁹ Any n of xl5, or 2 ^m xf(L), for example 2 ^m xL or 2 ^m xlog2(L) or 2 ^m xceil (L/2) and so on. Ml, m2, m3, m4, m, p are non-negative integers. f(L) is

with.

102. Scramble the signal carried by the E-PDCCH by using the corresponding scrambling code sequence; and send the scrambled signal to a receiving device. The receiving device transmitting the signal can be correctly decoded according to the scrambling code sequence in the transmitted signal. formula. The scrambling is performed by the following formula (1).

b(i) = (b(i) + c(i))mod2 (1)

Where b(i) is the signal bit transmitted by the E-PDCCH, and ^c (i) is the scrambling code. The generation of the scrambling code sequence ^c (i) is described in detail in Section 7.2 Pseudo-random sequence generation of the 3GPP 36.211 V10.3.0 (Physical Channels and Modulation, Release 10) version. At this point, the initialization of the scrambling code is

c _M

₊ N- ( ₂₎

Among them is the slot number. ^N ^ ^dl is the cell identification number (CdllD) or the identifier of the cell where the user equipment is located.

For the E-PDCCH, if it is a UE-level scrambling code, the UE-level scrambling code used by the UE's PDSCH transmission. The initialization of the scrambling code is c _init = n .2 ¹⁴ + q.2 ¹³ + n _s 12"·2 ⁹ + ' (3)

Where is the identifier assigned by the _eNB to the user equipment; q is the identifier of the codeword, for the first and second codewords, respectively denoted by q= ⁰ and q ⁼¹ ; for the slot number, the user equipment represented by ^NU is located The identity of the cell. Scrambling code initialization value for E - PDCCH, can be reused

^+^^+^/^ + ^^^ or use other _UE level scrambling code initialization values to generate scrambling codes.

FIG. 3 is another schematic flowchart of a signal transmitting method in an embodiment of the present invention. In this example, the aggregation level of the E-PDCCH is defined as M=l, 2, 4, 8. The E-PDCCH channel with an aggregation level of L consists of logical units (eCCEs) of L E-PDCCHs. In Table 1, the search space of the E-PDCCH in this example.

Table 1: Candidate set of E-PDCCH monitored by UE

In the above table, for example, the aggregation level of the UE is 4, and the number of candidate sets is 2. Then, the UE will blindly check twice under the condition that the E-PDCCH of the UE has an aggregation level of 4.

As shown in FIG. 3, the signal sending method in this example includes the following steps:

201. Predefining a scrambling code length. For example, the scrambling code length is equal to the occupied bit length of the UE's largest search space. For example, in Table 1, the maximum search space size is 16 eCCEs. Then, the scrambling code is generated according to the bit length occupied by the 16eCCE. 202. Initialization of the scrambling code. Specifically, the initial 4 special code sequence may be generated according to the initial method of the formula (3) or other scrambling code UE level.

203. For different E-PDCCHs, according to the size of the logical unit (ie, eCCE) and the size of the aggregation level, the scrambling codes of each aggregation level are extracted by cyclic shift, as shown in FIG. 4 .

In Figure 4, the starting positions of the different aggregation level scrambling codes are different. Figure 5 shows the scrambling codes corresponding to the obtained aggregation levels. In FIG. 5, as long as the aggregation level is fixed, the starting point of the scrambling code is fixed, but since the size of the occupied bits of each eCCE on the E-PDCCH may be different, the bits of the eCCE according to the E-PDCCH The length gets the scrambling sequence.

When starting from the starting position, if the initial scrambling code length is smaller than the scrambling code length required for the E-PDCCH, the required scrambling code is generated in a cyclic manner. As shown in Fig. 6, if the scrambling code length of the aggregation level 8 is not enough, the part of the initial scrambling code is obtained by looping.

When the loop is not enough, a loop of multiple passes can be performed. Then, as shown in Fig. 7, the dotted line with an arrow indicates the manner in which the scrambling code is obtained by loop. Wherein, the required scrambling code length is more than the initial scrambling code length L11 length, and after the loop is repeated from the starting position, the length of the recirculating L22 reaches the end position to obtain the scrambling code.

For example, suppose the generated scrambling code length is N, and the scrambling code sequence is recorded as r0, rl, r2, ..., rN-1. However, the required scrambling code length of the E-PDCCH is M, and M≥N, and the starting position of the scrambling code of the E-PDCCH is rS, and the scrambling sequence for the E-PDCCH is rS, rS+1, rN-1, rO, rl, rS-1, rS, rS+1, rX. Where X=(S+M-N-1) mod (N) in rX. That is, the scrambling code of the required length is generated by looping. If the length of the loop is not enough, then the loop is taken, and it is known that the required length is obtained.

Although different aggregation levels use different shifts, some special shifts may cause E-PDCCH decoding ambiguity. As shown in Fig. 8, it is assumed that the search space of AG = 1 is 6 eCCEs, and the search space of AG = 2 is 12 eCCEs, as shown in Table 1. The scrambling code is generated according to the length of the search space, then AG = 1 needs to generate a corresponding scrambling code of the length of 6 eCCs; AG = 2 needs to generate a corresponding scrambling code of the length of 12 eCCs; assuming AG = 1 interference The code start position is 0, AG = 2 The code start position is offset from the length of the CCE whose indices are 0 and 1, and the E-PDCCH is also blurred. Therefore, the difference in the starting position of the E-PDCCH of different aggregation levels can avoid this problem as long as it is not the bit length included in exactly one eCCE.

204. The E-PDCCH signal is scrambled according to the obtained scrambling code sequence and then sent.

It can be understood from the foregoing description that different scrambling code sequences are configured according to the number of logical units occupied by different E-PDCCHs, and the decoding does not cause the problem of ambiguous decoding of E-PDCCH signals of different aggregation levels. For example, in the prior art, when the PDSCH is a type 0 scheduling and the E-PDCCH is in one RBG, the RB determination error of the PDSCH is caused, which causes a decoding error of the PDSCH signal, and the technology in the embodiment of the present invention. The scheme can avoid such errors and can correctly decode each channel signal.

Corresponding to the above signal transmission method, an embodiment of the present invention further provides a signal receiving method. As shown in FIG. 9, the method includes the following steps:

301. Obtain a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel unit eCCEs occupied by the candidate enhanced physical downlink control channel E-PDCCH. The acquisition of the scrambling code sequence may be performed by the receiving end in the same manner as the transmitting end, that is, when the receiving end is blindly detected, the scrambling code is generated in the same manner as the sending according to the set eCCE number, and the eCCE is set by the receiving end. When the number is the same as the actual number of eCCEs sent by the sender, the scrambling code generated by the receiver can be the same as the scrambling code used by the sender.

That is, the step may specifically include:

I. Obtain an initial scrambling code sequence. Specifically, the initial scrambling code sequence may be obtained according to the bit length occupied by the largest search space of the receiving device.

And acquiring, according to the aggregation level of the candidate E-PDCCH, the scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence, where the candidate E-PDCCH of different aggregation levels is from the When acquiring the scrambling code sequence corresponding to the candidate E-PDCCH in the initial scrambling code sequence, Sequence.

On the other hand, a non-integer multiple of the bit length included in the scrambling code sequence corresponding to the candidate E-PDCCH of different aggregation levels.

In an optional embodiment, the number of eCCEs that the candidate E-PDCCH occupies corresponds to the aggregation level of the candidate E-PDCCH, and the at least two candidate E-PDCCHs of different aggregation levels correspond to the . The Yu code sequence is different.

In another optional embodiment, in the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels, the scrambling code corresponding to the candidate E-PDCCH with a higher aggregation level The first M codewords of the sequence are different from the codewords of the scrambling code sequence corresponding to the candidate E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the candidate E-PDCCH with the lower aggregation level. The corresponding scrambling code sequences have the same length.

In another optional embodiment, the acquiring the scrambling code sequence corresponding to the multiple candidate E-PDCCHs according to the number of the control channel unit eCCEs that the candidate E-PDCCH occupies is similar to the transmitting end, including: acquiring the initial scrambling code And obtaining, according to the aggregation level of the candidate E-PDCCH, a scrambling code sequence corresponding to the candidate E-PDCCH, where the at least two different aggregation start positions are different.

Optionally, the acquiring the initial scrambling code sequence comprises obtaining an initial scrambling code sequence according to a bit length occupied by the largest search space.

Optionally, for a starting position of the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels in the initial scrambling sequence, a sequence of intervals between the starting positions The length is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

In another optional embodiment, similar to the transmitting end, according to the candidate E-PDCCH Obtaining the number of the control channel unit eCCEs, and acquiring the scrambling code sequences corresponding to the plurality of candidate E-PDCCHs includes: obtaining an initial scrambling code sequence according to the aggregation level of the candidate E-PDCCH; wherein, the at least two different aggregation levels The initial scrambling code sequence corresponding to the candidate E-PDCCH is different; and the scrambling code sequence corresponding to the candidate E-PDCCH is obtained from the initial scrambling code sequence.

Optionally, the acquiring an initial scrambling code sequence according to the aggregation level of the candidate E-PDCCH includes obtaining an initial according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH.

The initialization function of the column is different. Preferably, the acquiring the initial scrambling code sequence according to the aggregation level, the initialization parameter, and the initialization function of the candidate E-PDCCH includes: according to the aggregation level of the candidate E-PDCCH, an initialization parameter, an initialization function, and the receiving device. The length of the bit occupied by the largest search space, and the initial scrambling sequence is obtained.

For example, for at least two different aggregation levels of the aggregation level supported by the base station or the user equipment, the initialization of the scrambling code is different, that is, different c _mit is generated. c _mit can be a function of the aggregation level, or a different c _mit generation function according to the aggregation level.

Specifically:

+ Nm + X , or 1 /2" 2 + N _ro + Χ _: for the first aggregation level

^C mit , or

Ln _s /2"2 + N _ro + X _n for the nth aggregation level

c _init = _ηκΝΉ .2 ^ml + q.2 ^m2 + Ln _s / 2J.2 ¹ " ³ + N _ro + f (L) , or n^ .2 ^ml + q.2 ^m2 + [n _s 12".2 ^m3 + N _ro + X _: for the first aggregation level ctait :> or

n^ .2 ^nd + q.2 ^m2 + [n _s 12".2^ + N _ro + X _n for the nth aggregation level

c _tait = n .2^ + q.2 ^m2 + ^ 12".2 ^m3 + N _ro + X , or c _init = (k 12" + D(2 · N _ro + l).2 ^ml + n .2 ^M2 + X where is the slot number; is the radio network temporary identifier; ^N m is the identifier of the cell or virtual cell where the user equipment is located, and the radio network temporary identifier (for example, C-RNTI SPS C-RNTL Temporary C-RNTI, etc.) The user equipment is used to generate at least one of the parameters of the DMRS sequence; ml, m2, m3 are non-negative integers, q is equal to 0 or 1; for at least two different aggregation levels, the values of X are different.

X is 2 ^m xf(L) , where f(L) is a function of aggregation level L; or X is a non-zero integer, and the values of X are different for at least two different aggregation levels. By way of example, X can be 2 ^m xL or 2 ^m xlo _g 2 (L) or 2 ^m xp or 2 ^m xceil (L/2), where p is a non-negative integer and for at least two different aggregation levels, P The value is also different. ^, Χ _η is a value corresponding to the first aggregation level, ..., the nth aggregation level, respectively. ^Χ ι , can be a non-negative integer such as 0, 1, ..., or 2 ^m xp , for example

2 ⁹ xl0,2 ⁹ xll,2 ⁹ xl2,2 ⁹ xl3,2 ⁹ xl4,2 ⁹ Any n of xl5, or 2 ^m xf(L), for example 2 ^m xL or 2 ^m xlog2(L) or 2 ^m xceil (L/2) and so on. Ml, m2, m3, m4, m, p are non-negative integers. f(L) is the same.

302. Receive a signal sent by the sending device.

302. Perform blind detection on the signal by using the scrambling code sequence. In the case of blind detection, only the number of eCCEs occupied by the E-PDCCH set by the receiving end and the received E-PDCCH are occupied. When the number of eCCEs is the same, the correct scrambling sequence can be obtained, and the correct decoding response can be obtained.

The method may include: selecting one E-PDCCH from the plurality of candidate E-PDCCHs; and performing, by using the scrambling code sequence corresponding to the selected E-PDCCH, the signals carried by the selected E-PDCCH 7 Decoding.

The processing of the decoding result may be specifically: if the correct decoding response is obtained, acquiring the decoded signal; if an erroneous decoding response is obtained, excluding the plurality of candidate E-PDCCHs After the selected E-PDCCH is described, the blind detection is performed again.

For example, resetting the number of eCCEs occupied by the E-PDCCH, and obtaining a scrambling code sequence according to the number of eCCEs occupied by the reset E-PDCCH, and decoding, and determining whether the decoding is correct, if it is correct, outputting The result of the decoding, if not correct, repeats the setting and decoding until the correct decoding is obtained.

Of course, if the number of eCCEs occupied by all possible E-PDCCHs is set, and the correct decoding result cannot be obtained, the received signal is prompted to be incorrect, and the request to resend or/and directly discard the received signal is specifically The operation can refer to the processing method in the prior art.

That is, since the transmission signal transmitted from the E-PDCCH is a signal scrambled according to the scrambling code sequence of the eCCE it occupies, when the receiver receives, the blind detection process, although the receiver sets the E-PDCCH according to it The number of eCCEs occupied is decoded, but because the number of different eCCEs in the scrambling is different, the corresponding scrambling sequence is different. For the receiver, only the eCCEs according to the number of eCCEs occupied by the E-PDCCH of the sender are the same. The number is decoded to obtain the correct decoding result. In the prior art, it is possible to use different eCCE data for decoding, and still obtain a correct decoding response, thereby causing erroneous decoding.

For example, if the sender sends an aggregation level of 4, if the receiver sets the aggregation level to 1 or 2 for decoding, the receiver will not decode correctly. The receiver will adjust the aggregation level until the aggregation level is set to 4. Correctly decode the signal.

Of course, it should be noted that only the technical solutions related to the prior art are mainly described in the foregoing signal transmitting and receiving methods. In the specific signal transmission, the number of bits of the E-PDDCH at the transmitting end is First, channel coding (such as convolutional code) is performed, and then Cyclic redundancy check (CRC) bits are added; then, the CRC-added bits are bit-scrambled (that is, in the manner of the above embodiment). Scrambling); then modulating the scrambled bits, and so on.

At the receiving end, after receiving the E-PDDCH, the information is demodulated to obtain the bit information, and then the descrambling code operation is performed according to the scrambling code; then the channel decoding is performed; after the channel decoding, it is determined whether the data is received according to the result of the CRC check. E-PDDCH.

In the prior art, as shown in FIG. 1, it is assumed that one RB has two eCCEs and the transmitted E-PDDCH is four eCCEs (aggregation level is 4). However, according to the prior art, it is likely that when the aggregation level of the E-PDDCH is 1, 2, their scrambling codes are the first part of the scrambling code of the aggregation level of 4, respectively. That is, the scrambling code of the low aggregation level is a part of the scrambling code of the high aggregation level (related to the number of bits). Thus, when the E-PDDCH of the high aggregation level is transmitted, the E-PDDCH of the low aggregation level is also likely to be correctly decoded.

After the method used in the embodiment of the present invention is adopted, the scrambling codes of different aggregation levels are obtained by cyclic shifting according to the aggregation level, thereby avoiding the possibility that the scrambling code of the low aggregation level is the former part of the scrambling code of the high aggregation level. Sex. In this way, the receiving end performs the descrambling operation according to the scrambling code, and after the channel decoding, the root result prompting signal is incorrect, and the scrambling code corresponding to the other aggregation level may be re-selected for descrambling until the verification result is correct, or when all If the possible scrambling codes are still unable to obtain the correct result after the test, the received signal is incorrect, the received signal is discarded, and/or the request signal is resent.

FIG. 10 is a schematic diagram of a specific composition of a signal sending apparatus according to an embodiment of the present invention, where the apparatus may be located in a base station. The signal transmitting apparatus 1 may include: a scrambling code acquiring unit 10, configured to acquire a scrambling code sequence corresponding to the E-PDCCH according to the number of eCCEs occupied by the E-PDCCH; and the scrambling unit 12 is configured to use the corresponding The scrambling code sequence scrambles the signal carried by the E-PDCCH; and the scrambling transmitting unit 14 is configured to send the scrambled signal to the receiving device.

If the number of eCCEs corresponds to the aggregation level of the E-PDCCH, as shown in FIG. As shown, the scrambling code obtaining unit 10 may include: an initial sequence obtaining subunit 100, configured to acquire an initial scrambling code sequence; and a scrambling code obtaining subunit 102, configured to use the initial scrambling according to an aggregation level of the E-PDCCH Obtaining a scrambling code sequence corresponding to the E-PDCCH in a code sequence, where different aggregation levels are the same. In another embodiment, the number of eCCEs occupied by the E-PDCCH corresponds to an aggregation level of the E-PDCCH, and the scrambling code sequence corresponding to at least two E-PDCCHs of different aggregation levels is different. Preferably, in the scrambling code sequence corresponding to the E-PDCCH of the at least two different aggregation levels, the first M codewords of the scrambling code sequence corresponding to the E-PDCCH with a higher aggregation level and the aggregation The codewords of the scrambling code sequence corresponding to the lower-level E-PDCCH are different, and the length of the M codewords is the same as the length of the scrambling code sequence corresponding to the E-PDCCH with a lower aggregation level. . The sequence length of the interval between the start positions is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level. The bit length occupied by the largest search space, and the initial scrambling sequence is obtained.

In an optional embodiment, the scrambling code obtaining unit 10 includes:

An initial sequence obtaining subunit 100, configured to acquire an initial scrambling code sequence;

The scrambling code acquisition sub-unit 102 is configured to acquire, according to the aggregation level of the E-PDCCH, the scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence, where at least two different aggregation levels are different. The initial sequence acquisition subunit 100 is configured to obtain an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device. Optionally, a start position of the scrambling code sequence corresponding to the E-PDCCH corresponding to the at least two different aggregation levels in the initial scrambling code sequence, and a sequence length between the start positions A non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

In another optional embodiment, the scrambling code obtaining unit 10 includes:

The initial sequence acquisition sub-unit 100 is configured to obtain an initial scrambling code sequence according to the aggregation level of the E-PDCCH, where the initial scrambling code sequence corresponding to the E-PDCCH of at least two different aggregation levels is different;

The scrambling code acquisition sub-unit 102 is configured to obtain a scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence.

Optionally, the initial sequence acquisition sub-unit 100 according to the aggregation level ¹ J another E-PDCCH, and acquire initial scrambling sequence comprising:

The initial sequence acquisition sub-unit 100 is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the E-PDCCH, where the initial scrambling code corresponding to the at least two different aggregation levels The initialization parameters of the sequence are different; and/or the at least two different aggregations are optional, the initial sequence acquisition sub-unit 100 is configured to obtain an initial according to the aggregation level of the E-PDCCH and the initialization function and the initialization function. The scrambling code sequence includes: the initial sequence obtaining subunit is configured to obtain an initial scrambling code sequence according to an aggregation level of the E-PDCCH, an initialization parameter, an initialization function, and a bit length occupied by a maximum search space of the receiving device. .

Optionally, the initialization parameter C _mit of the initial scrambling code is: _Cinit = Ln _s /2" 2 ^ml + N _ro + X, where n _s is a slot number; N _m is a cell or virtual area where the user equipment is located At least one of the identifier of the cell, the temporary identifier of the wireless network, and the parameter used by the user equipment to generate the DMRS sequence; ml is non-negative, and the initialization parameter c _mit of the initial scrambling code is: c _M = _nRNn 2^ + q .2 ^m2 + [n _s / 2j.2 ^m3 + N _ro + X , where n _s is the slot number; _ηκΝΉ is the wireless network a temporary identifier; N _m is an identifier of a cell or a virtual cell where the user equipment is located, and a wireless network temporary identifier, at least one of parameters used by the user equipment to generate a DMRS sequence; ml, m2, m3 are the same.

Optionally, the initialization parameter c _mit of the initial scrambling code is: c _init = (k / 2j + 1)(2 - N _ro + l). 2 ^ml + _ηκΝΉ 2 ^m2 + X , where n _{s is} time No _gap; nRN11 a radio network temporary identity; N _m is the cell where the user equipment or a virtual cell identifier, radio network temporary identity, the user equipment parameters for generating the DMRS sequence of at least one; ml, m2 non-selectable , X = 2 ^m xf (L) , where f (L) is a function of the aggregation level L, and the values of the f (L) corresponding to the at least two different aggregation levels are different; wherein m is non-negative An integer; or alternatively, the 2 ^m xf (L) is at least one of 2 ^m x L , 2 ^m x log 2 (L) , 2 ^m χ ρ , 2 ^m x ceil (L/2), wherein And p is a non-negative integer, the p value corresponding to the at least two different aggregation levels is different, and/or the parameter used by the user equipment to generate the DMRS sequence is an identifier used by the user equipment to generate the DMRS sequence, or is a user. The device is used to generate a scrambling code ID for the DMRS sequence.

The scrambling code acquisition sub-unit 102 is further configured to cyclically read the initial scrambling code sequence to obtain a scrambling code sequence corresponding to the E-PDCCH.

In a specific embodiment, the above signal transmitting device can be set in the base station.

FIG. 12 is a schematic diagram of a specific composition of a signal receiving apparatus according to an embodiment of the present invention, and the apparatus may be located in a mobile terminal. The signal receiving apparatus 2 may include: a scrambling code unit 20, configured to acquire a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel elements eCCE occupied by the candidate enhanced physical downlink control channel E-PDCCH; The unit 22 is configured to receive a signal sent by the sending device, and the detecting unit 24 is configured to perform blind detection on the signal by using the scrambling code sequence.

The scrambling code 20 on the signal receiving side may be similar to: a start sequence sub-unit, configured to obtain an initial scrambling code sequence, and a scrambling code sub-unit, configured to acquire, according to an aggregation level of the candidate E-PDCCH, a scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence The start of the scrambling code sequence corresponding to the candidate E-PDCCH of different aggregation levels in the initial scrambling sequence is different. In another embodiment, the number of eCCEs occupied by the candidate E-PDCCH corresponds to the aggregation level of the candidate E-PDCCH, and the scrambling code sequence corresponding to the candidate E-PDCCH of at least two different aggregation levels different. Preferably, in the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels, the first M codewords of the scrambling code sequence corresponding to the candidate E-PDCCH with a higher aggregation level Different from the codeword of the scrambling code sequence corresponding to the candidate E-PDCCH with a lower aggregation level, the length of the M codewords and the scrambling code corresponding to the candidate E-PDCCH with a lower aggregation level The length of the sequence is the same.

The initial sequence sub-unit is specifically configured to obtain an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device. The scrambling code subunit may be further configured to cyclically read the initial scrambling code sequence to obtain a scrambling code sequence corresponding to the candidate E-PDCCH.

At the same time, for the start position of the scrambling code sequence corresponding to the candidate E-PDCCH of different aggregation levels, the sequence length of the interval between the start positions is a non-bit length included in the number of eCCEs corresponding to each aggregation level. Integer multiple.

In an optional embodiment, the scrambling unit 20 includes: an initial sequence subunit, configured to acquire an initial scrambling code sequence, and a scrambling code subunit, configured to use, according to an aggregation level of the candidate E-PDCCH, from the Acquiring the scrambling code sequence corresponding to the candidate E-PDCCH in the initial scrambling sequence, where the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels is in the initial scrambling sequence The starting position is different. The unit is configured to obtain an initial scrambling code sequence according to the bit length occupied by the largest search space.

Optionally, for a starting position of the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels in the initial scrambling sequence, a sequence of intervals between the starting positions The length is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level. In another optional embodiment, the scrambling unit 20 includes an initial sequence subunit, configured to obtain an initial scrambling code sequence according to an aggregation level of the candidate E-PDCCH; wherein, at least two different aggregation levels The initial scrambling code sequence corresponding to the candidate E-PDCCH is different; the scrambling code sub-unit is configured to acquire a scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence.

Optionally, the initial sequence subunit is configured to obtain an initial scrambling code sequence according to the aggregation level of the candidate E-PDCCH, where the initial sequence subunit is used to initialize according to an aggregation level of the candidate E-PDCCH. a parameter and an initialization function, obtaining an initial scrambling code sequence; wherein, the at least two

Optionally, the initial sequence subunit is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH, where the initial sequence subunit is used according to the The aggregation level of the candidate E-PDCCH, the initialization parameter, the initialization function, and the bit length occupied by the maximum search space of the receiving device are obtained, and an initial scrambling code sequence is obtained.

Optionally, the initialization parameter c _mit of the initial scrambling code is: c _init = Ln _s /2" 2 ^ml + N _ro + X, where is the slot number; N _m is the cell or virtual cell where the user equipment is located The identifier of the wireless network, the temporary identifier of the wireless network, and at least one of the parameters used by the user equipment to generate the DMRS sequence; ml is non-negative, and the initialization parameter c _mit of the initial scrambling code is: c _M = 2^ + q.2 ^M2 + n _s 12j.2 ^m3 + N _ro + X , where n _s is the slot number; _nRN11 is the radio network temporary identifier; N _m is the identifier of the cell or virtual cell where the user equipment is located, the temporary identifier of the wireless network, The user equipment is used to generate at least one of the parameters of the DMRS sequence; ml, m2, m3 are the same.

Optionally, the initialization parameter c _mit of the initial scrambling code is: c _init = (k / 2j + 1)(2 - N _ro + l).2 ^ml + _ηκΝΉ .2 ^m2 + X , where n _s is the slot number; _nRN11 is the wireless network temporary identifier; N _m is the The identifier of the cell or virtual cell where the user equipment is located, the temporary identifier of the wireless network, and at least one of the parameters used by the user equipment to generate the DMRS sequence; ml, m2 are non-optional, X=2 ^m xf (L), where f (L) Is a function of the aggregation level L, and the values of the f(L) corresponding to the at least two different aggregation levels are different; wherein m is a non-negative integer; or alternatively, the 2 ^m xf (L) Is at least one of 2 ^m x L , 2 ^m x log 2 (L) , 2 ^m χ ρ , 2 ^m x ceil (L/2), where p is a non-negative integer, the at least two different aggregation levels Corresponding to the different p values, and/or

The parameter used by the user equipment to generate the DMRS sequence is the identifier used by the user equipment to generate the DMRS sequence, or the scrambling code ID used by the user equipment to generate the DMRS sequence.

The detecting unit 24 may further include: a selecting subunit, configured to select one E-PDCCH from the multiple candidate E-PDCCHs; and a decoding subunit, configured to use a scrambling code corresponding to the selected E-PDCCH The sequence decodes the signal carried by the selected E-PDCCH. And further comprising: correctly processing the subunit, configured to acquire the decoded signal when the decoding subunit obtains a correct decoding response; and retry processing subunit, when the decoding sub After the unit obtains an erroneous decoding response, the blind detection is performed again after the selected E-PDCCH is excluded from the plurality of candidate E-PDCCHs.

The terms and specific functional details in the above device embodiments are the same as those in the foregoing method embodiments, and are not described herein.

According to the description of the foregoing embodiment, when the E-PDCCH signal is transmitted in the embodiment of the present invention, the signal is scrambled according to the scrambling sequence related to the number of eCCEs, so that the signal receiving end only performs the decoding when performing the decoding. The number of eCCEs of the corresponding E-PDCCH is decoded to obtain a correct decoding result. A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

Rights request

A method for transmitting a signal, the method comprising:

The scrambled signal is sent to the receiving device.

2. The method according to claim 1, wherein the number of eCCEs occupied by the E-PDCCH corresponds to an aggregation level of the E-PDCCH, and the corresponding E-PDCCH of at least two different aggregation levels The scrambling code sequence is different.

The method according to claim 2, wherein, in the scrambling code sequence corresponding to the E-PDCCH of the at least two different aggregation levels, the E-PDCCH corresponding to the higher aggregation level corresponds to The first M codewords of the scrambling code sequence are different from the codewords of the scrambling code sequence corresponding to the E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the E- of the aggregation level. The length of the scrambling code sequence corresponding to the PDCCH is the same.

The method according to claim 2 or 3, wherein the acquiring the scrambling code sequence corresponding to the E-PDCCH according to the number of eCCEs occupied by the E-PDCCH includes:

Obtaining an initial scrambling code sequence;

Obtaining, according to the aggregation level of the E-PDCCH, the scrambling code sequence corresponding to the E-PDCCH, where the E-PDCCH corresponding to the at least two different aggregation levels corresponds to The starting position of the scrambling code sequence in the initial scrambling code sequence is different.

The method according to claim 4, wherein the acquiring the initial scrambling code sequence comprises: obtaining the initial scrambling sequence according to a bit length occupied by a maximum search space of the receiving device.

6. The method of claim 4 or 5, wherein, for the at least two different The sequence length of the interval between the start positions is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

Acquiring an initial scrambling code sequence according to the aggregation level of the E-PDCCH; where the initial scrambling code sequence corresponding to the E-PDCCH of the at least two different aggregation levels is different;

Obtaining a scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence.

The method according to claim 7, wherein the obtaining the initial scrambling code sequence according to the aggregation level of the E-PDCCH includes:

Acquiring initial interference according to the aggregation level, initialization parameter, and initialization function of the E-PDCCH

The initialization function is different.

The method according to claim 8, wherein the obtaining the initial scrambling code sequence according to the aggregation level, the initialization parameter, and the initialization function of the E-PDCCH includes:

An initial scrambling code sequence is obtained according to an aggregation level of the E-PDCCH, an initialization parameter, an initialization function, and a bit length occupied by a maximum search space of the receiving device.

The method according to claim 8 or 9, wherein the initialization parameter C _mit of the initial scrambling code is: ^ = ^ /2" 2 ₊ ^^ ₊ , where n _s is a slot number; N _m At least one of an identifier of a cell or a virtual cell where the user equipment is located, a temporary identifier of a wireless network, and a parameter used by the user equipment to generate a DMRS sequence; ml is a non-negative integer; the at least two different aggregation levels are corresponding to the The X values are different.

The method according to claim 8 or 9, wherein the initialization parameter C _mit of the initial scrambling code is: ^^ n^ + q ^ + Liis ^^ms + Nm + X , where n _s is The time slot number; _nRN11 is a temporary identifier of the wireless network; N _m is the identifier of the cell or virtual cell where the user equipment is located, and the wireless The network temporary identifier, at least one of the parameters used by the user equipment to generate the DMRS sequence; ml, m2, m3 are non-negative integers, q is equal to 0 or 1; and the X values corresponding to the at least two different aggregation levels are different.

The method according to claim 8 or 9, wherein the initialization parameter C _mit of the initial scrambling code is:

+ Χ, where n _s is the slot number; _nRN11 is the radio network temporary identifier; N _m is the identifier of the cell or virtual cell where the user equipment is located, the radio network temporary identifier, and the parameter used by the user equipment to generate the DMRS sequence At least one; ml,

13. A method as claimed in claims 10 to 12, characterized in that:

X=2 ^m xf(L) , where f(L) is a function of the aggregation level L, and the values of the f(L) corresponding to the at least two different aggregation levels are different; wherein m is a non-negative integer; or

14. The method of claim 13 wherein:

The 2 ^m xf (L) is at least one of 2 ^m xL, 2 ^m x log 2 (L) , 2 ^m χ ρ , 2 ^m xceil (L/2),

/ or

The method according to any one of claims 1 to 3, wherein the number of eCCEs corresponds to an aggregation level of the E-PDCCH, and the number of eCCEs occupied by the E-PDCCH is obtained. The scrambling code sequence corresponding to the E-PDCCH includes:

Obtaining an initial scrambling code sequence;

Obtaining, according to the aggregation level of the E-PDCCH, the scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence, where the scrambling code sequence corresponding to the E-PDCCH of different aggregation levels is The starting positions in the initial scrambling code sequence are different. The method according to claim 15, wherein the acquiring the initial scrambling code sequence comprises:

An initial scrambling code sequence is obtained based on the bit length occupied by the largest search space of the receiving device.

The method according to claim 15 or 16, wherein, for the start position of the scrambling code sequence corresponding to the E-PDCCH of different aggregation levels, the sequence length between the start positions is A non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

The method according to any one of claims 4 to 17, wherein the acquiring the scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence comprises:

The initial scrambling code sequence is cyclically read to obtain a scrambling code sequence corresponding to the E-PDCCH.

19. A signal receiving method, the method comprising:

Acquiring a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel unit eCCEs occupied by the candidate enhanced physical downlink control channel E-PDCCH;

Receiving a signal sent by the transmitting device;

The signal is blindly detected using the scrambling code sequence.

The method according to claim 19, wherein the number of eCCEs occupied by the candidate E-PDCCH corresponds to an aggregation level of the candidate E-PDCCH, and at least two candidate E-PDCCHs of different aggregation levels The corresponding scrambling code sequences are different.

The method according to claim 20, wherein, in the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels, the candidate E-PDCCH with a higher aggregation level corresponds to The first M codewords of the scrambling code sequence are different from the codewords of the scrambling code sequence corresponding to the candidate E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the aggregation level. The length of the scrambling code sequence corresponding to the candidate E-PDCCH is the same.

The method according to claim 20 or 21, wherein the candidate E-PDCCH The number of the control channel unit eCCEs, and the scrambling code sequences corresponding to the multiple candidate E-PDCCHs include:

Obtaining an initial scrambling code sequence;

Obtaining, according to the aggregation level of the candidate E-PDCCH, the scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence, where the candidate of the at least two different aggregation levels

The method according to claim 22, wherein the obtaining the initial scrambling code sequence comprises:

The initial scrambling code sequence is obtained according to the bit length occupied by the largest search space.

The method according to claim 22 or 23, wherein, for the at least two different starting positions, the sequence length of the interval between the starting positions is included in the number of eCCEs corresponding to each aggregation level. A non-integer multiple of the bit length.

The method according to claim 20 or 21, wherein the obtaining the scrambling code sequence corresponding to the plurality of candidate E-PDCCHs according to the number of control channel units eCCE occupied by the candidate E-PDCCH comprises:

Acquiring an initial scrambling code sequence according to the aggregation level of the candidate E-PDCCH; wherein, the initial scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels is different; The scrambling code sequence corresponding to the candidate E-PDCCH is obtained in the code sequence.

The method according to claim 25, wherein the obtaining the initial scrambling code sequence according to the aggregation level of the candidate E-PDCCH comprises:

Obtaining an initial according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH

The initialization function of the sequence is different. The method according to claim 26, wherein the obtaining an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH includes:

An initial scrambling code sequence is obtained according to an aggregation level of the candidate E-PDCCH, an initialization parameter, an initialization function, and a bit length occupied by a maximum search space of the receiving device.

The method according to claim 26 or 27, wherein the initialization parameter c _mit of the initial scrambling code is:

+Nm + X, where is the slot number; N _ID is at least one of the identifier of the cell or virtual cell in which the user equipment is located, the temporary identifier of the wireless network, and the parameter used by the user equipment to generate the DMRS sequence; ml is a non-negative integer; The X values corresponding to the at least two different aggregation levels are different.

The method according to claim 26 or 27, wherein the initialization parameter C _mit of the initial scrambling code is: ^ ! !匪^ + ^ +^ ^^^ + ^^ + , where n _s is the slot number; _ηκΝΉ is the temporary identifier of the wireless network; N _m is the identifier of the cell or virtual cell where the user equipment is located, the temporary identifier of the wireless network, The user equipment is configured to generate at least one of the parameters of the DMRS sequence; ml, m2, m3 are non-negative integers, q is equal to 0 or 1; and the X values corresponding to the at least two different aggregation levels are different.

The method according to claim 26 or 27, wherein the initialization parameter c _mit of the initial scrambling code is: ^(^ ^ ^^ +丄^ +!! 丽^ + , where n _{s is} time _{η ΝΉ} is a wireless network temporary identifier; N _m is an identifier of a cell or a virtual cell where the user equipment is located, and a wireless network temporary identifier, at least one of parameters used by the user equipment to generate a DMRS sequence;

31. The method of claims 28 to 30, characterized by:

X=2 ^m xf(L) , where f(L) is a function of the aggregation level L, and the values of the f(L) corresponding to the at least two different aggregation levels are different; wherein m is a non-negative integer; or 32. The method of claim 31, wherein:

The 2 ^m xf (L) is at least one of 2 ^m x L , 2 ^m x log 2 (L) , 2 ^m xp , 2 ^m x ceil (L/2),

/ or

The method according to any one of claims 19 to 21, wherein the acquiring a plurality of candidate E-PDCCHs according to the number of control channel elements eCCE occupied by the candidate enhanced physical downlink control channel E-PDCCH The corresponding scrambling code sequence includes:

Obtaining an initial scrambling code sequence;

Obtaining, according to the aggregation level of the candidate E-PDCCH, the scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence, where the candidate E-PDCCHs of different aggregation levels are used.

34. The method of claim 33, wherein the obtaining the initial scrambling code sequence comprises:

The initial scrambling code sequence is obtained according to the bit length occupied by the largest search space of the receiving device.

The method according to claim 33 or 34, wherein, for the start position of the scrambling code sequence corresponding to the candidate E-PDCCH of different aggregation levels, the starting position is separated by The sequence length is a non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

The method according to any one of claims 22 to 35, wherein the acquiring the scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence comprises:

The initial scrambling code sequence is cyclically read to obtain a scrambling code sequence corresponding to the candidate E-PDCCH.

The method according to any one of claims 19 to 36, wherein the blind detection of the signal by using the scrambling code sequence comprises: Selecting one E-PDCCH from the plurality of candidate E-PDCCHs;

And decoding, by using the scrambling code sequence corresponding to the selected E-PDCCH, a signal carried by the selected E-PDCCH.

38. The method of claim 37, wherein the blindly detecting the signal by using the scrambling code sequence further comprises:

Obtaining the decoded signal if a correct decoding response is obtained;

If the erroneous decoding response is obtained, the blind detection is performed again after the selected E-PDCCH is excluded from the plurality of candidate E-PDCCHs. 39. A signal transmitting apparatus, wherein the apparatus comprises:

The device according to claim 39, wherein the number of eCCEs occupied by the E-PDCCH corresponds to an aggregation level of the E-PDCCH, and the corresponding E-PDCCH of at least two different aggregation levels The scrambling code sequence is different.

The device according to claim 40, wherein, in the scrambling code sequence corresponding to the E-PDCCH of the at least two different aggregation levels, the E-PDCCH corresponding to the higher aggregation level corresponds to The first M codewords of the scrambling code sequence are different from the codewords of the scrambling code sequence corresponding to the E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the E-level of the aggregation level. The length of the scrambling code sequence corresponding to the PDCCH is the same.

The device according to claim 40 or 41, wherein the scrambling code acquisition unit comprises: An initial sequence acquisition subunit, configured to obtain an initial scrambling code sequence;

And a scrambling code obtaining sub-unit, configured to acquire, according to the aggregation level of the E-PDCCH, the scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence, where at least two different aggregation levels are the same.

43. The apparatus according to claim 42, wherein the initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence, including:

The initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device.

44. The apparatus of claim 42 or 43, wherein, for the at least two

A non-integer multiple of the included bit length.

The device according to claim 40 or 41, wherein the scrambling code acquisition unit comprises:

An initial sequence obtaining sub-unit, configured to acquire an initial scrambling sequence according to an aggregation level of the E-PDCCH, where the initial scrambling sequence corresponding to the E-PDCCH of at least two different aggregation levels is different;

And a scrambling code acquisition subunit, configured to acquire a scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence.

The apparatus according to claim 45, wherein the initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence according to an aggregation level of the E-PDCCH, including:

The initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the E-PDCCH, where the initial scrambling code sequence corresponding to the at least two different aggregation levels Different initialization parameters; and/or, the at least two different aggregation levels The apparatus according to claim 46, wherein the initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the E-PDCCH, including:

The initial sequence acquisition subunit is configured to obtain an initial scrambling code sequence according to an aggregation level of the E-PDCCH, an initialization parameter, an initialization function, and a bit length occupied by a maximum search space of the receiving device.

The apparatus according to claim 45 or 46, wherein the initialization parameter c _mit of the initial scrambling code is:

+ X , where n _s is a slot number; N _ID is at least one of an identifier of a cell or a virtual cell in which the user equipment is located, a temporary identifier of a wireless network, and a parameter used by the user equipment to generate a DMRS sequence; ml is a non-negative integer; The X values corresponding to the at least two different aggregation levels are different.

49. The apparatus according to claim 45 or 46, wherein the initialization parameter C _mit of the initial scrambling code is:

+ Nm + X , where n _s is the slot number; _ηκΝΉ is the temporary identifier of the wireless network; N _m is the identifier of the cell or virtual cell where the user equipment is located, the temporary identifier of the wireless network, and the parameter used by the user equipment to generate the DMRS sequence At least one of; ml , m2, m3 is a non-negative integer, q is equal to 0 or 1; the X values corresponding to the at least two different aggregation levels are different.

50. The apparatus according to claim 45 or 46, wherein the initialization parameter C _init of the initial scrambling code is: c _init

+ X , where n _s is the slot number;

3⁄4Ν _Ή is a wireless network temporary identifier; N _m is an identifier of a cell or a virtual cell where the user equipment is located, and a wireless network temporary identifier, at least one of parameters used by the user equipment to generate a DMRS sequence;

51. Apparatus according to any one of claims 48 to 50 wherein:

X = 2 ^m xf (L) , where f (L) is a function of the aggregation level L and the at least two different aggregation levels The value of f (L) corresponding to the other is different; wherein m is a non-negative integer; or

X is a non-zero integer, and;

52. Apparatus according to claim 51 wherein:

The 2 ^m xf (L) is at least one of 2 ^m x L , 2 ^m x log 2 (L) , 2 ^m χ ρ , 2 ^m x ceil (L/2),

/ or

The device according to any one of claims 39 to 41, wherein the number of eCCEs corresponds to an aggregation level of the E-PDCCH, and the scrambling code acquisition unit comprises:

An initial sequence acquisition subunit, configured to obtain an initial scrambling code sequence;

a scrambling code obtaining sub-unit, configured to acquire, according to the aggregation level of the E-PDCCH, a scrambling code sequence corresponding to the E-PDCCH from the initial scrambling code sequence, where the 54 of different aggregation levels, such as a right The apparatus of claim 53, wherein the initial sequence acquisition sub-unit is specifically configured to obtain an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device.

The device according to claim 53 or 54, wherein, for the start position of the scrambling code sequence corresponding to the E-PDCCH of different aggregation levels, the sequence length between the start positions is A non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

The apparatus according to any one of claims 42 to 55, wherein the scrambling code sequence type signal receiving apparatus is characterized in that: the apparatus comprises: a scrambling unit, configured to acquire a scrambling code sequence corresponding to multiple candidate E-PDCCHs according to the number of control channel units eCCE occupied by the candidate enhanced physical downlink control channel E-PDCCH;

The device according to claim 57, wherein the number of eCCEs occupied by the candidate E-PDCCH corresponds to an aggregation level of the candidate E-PDCCH, and at least two candidate E-PDCCHs of different aggregation levels The corresponding scrambling code sequences are different.

The device according to claim 58, wherein, in the scrambling code sequence corresponding to the candidate E-PDCCH of the at least two different aggregation levels, the candidate E-PDCCH with a higher aggregation level corresponds to The first M codewords of the scrambling code sequence are different from the codewords of the scrambling code sequence corresponding to the candidate E-PDCCH with a lower aggregation level, and the length of the M codewords is lower than the aggregation level. The length of the scrambling code sequence corresponding to the candidate E-PDCCH is the same.

The apparatus according to claim 58 or claim 59, wherein the scrambling code unit comprises: an initial sequence subunit, configured to acquire an initial scrambling code sequence;

a scrambling code sub-unit, configured to acquire, according to an aggregation level of the candidate E-PDCCH, a scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence, where the at least two different poly starting positions different.

The apparatus according to claim 60, wherein the initial sequence subunit is used to obtain an initial scrambling code sequence, including:

The initial sequence sub-unit is configured to obtain an initial scrambling code sequence based on the bit length occupied by the largest search space.

The device according to claim 60 or claim 61, wherein, for the at least two initial positions, the sequence length between the start positions is the number of eCCEs corresponding to each aggregation level. A non-integer multiple of the bit length included in the destination.

The apparatus according to claim 58 or 59, wherein the scrambling code unit comprises: an initial sequence subunit, configured to acquire an initial scrambling code sequence according to an aggregation level of the candidate E-PDCCH; The initial scrambling sequence corresponding to the candidate E-PDCCH of at least two different aggregation levels is different;

And a scrambling code unit, configured to acquire, from the initial scrambling code sequence, a scrambling code sequence corresponding to the candidate E-PDCCH.

The apparatus according to claim 63, wherein the initial sequence subunit is configured to acquire an initial scrambling code sequence according to an aggregation level of the candidate E-PDCCH, including:

The initial sequence sub-unit is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH, where the initial scrambling code sequence corresponding to the at least two different aggregation levels Different initialization parameters; and/or, the at least two different aggregation levels

The apparatus according to claim 64, wherein the initial sequence subunit is configured to obtain an initial scrambling code sequence according to an aggregation level, an initialization parameter, and an initialization function of the candidate E-PDCCH, including:

The initial sequence subunit is configured to obtain an initial 4 sigma sequence according to an aggregation level of the candidate E-PDCCH, an initialization parameter, an initialization function, and a bit length occupied by a maximum search space of the receiving device.

66. The apparatus according to claim 64 or 65, wherein the initialization parameter C _mit of the initial scrambling code is: ^^^ ^^ + ί^ + Χ , where is a slot number; N _ID is The identifier of the cell or virtual cell where the user equipment is located, the temporary identifier of the wireless network, and the user equipment are used to generate

At least one of the parameters of the DMRS sequence; ml is a non-negative integer; the X values corresponding to the at least two different aggregation levels are different.

67. The apparatus of claim 64 or 65, wherein the initial scrambling code is initial The parameter C _mit is:

+ Nm + X, where, n _s is a slot _number; ¾Ν Ή is a radio network temporary identity; N _m is the identifier of the cell where the user equipment or the virtual cell, radio network temporary identity, the user device for generating a DMRS sequence At least one of the parameters; ml, m2, m3 are non-negative integers, q is equal to 0 or 1; the X values corresponding to the at least two different aggregation levels are different.

68. The apparatus according to claim 64 or 65, wherein the initialization parameter C _mit of the initial scrambling code is: Cinit

+ X, where, n _s is a slot _number; ¾Ν Ή is a radio network temporary identity; N _m is the cell where the user equipment identifier or virtual cell radio network temporary identifier, the user equipment parameters for generating the DMRS sequence At least one;

69. Apparatus according to any one of claims 66 to 68, wherein

X=2 ^m xf(L) , where f(L) is a function of the aggregation level L, and the values of the f(L) corresponding to the at least two different aggregation levels are different; wherein m is a non-negative integer; Or 70. The apparatus of claim 69, wherein

The 2 ^m xf (L) is at least one of 2 ^m xL, 2 ^m x log 2 (L) , 2 ^m xp , 2 ^m xceil (L/2),

/ or

The apparatus according to any one of claims 57 to 59, wherein the scrambling code unit comprises:

An initial sequence subunit, configured to obtain an initial scrambling sequence;

a scrambling code unit, configured to acquire, according to an aggregation level of the candidate E-PDCCH, a scrambling code sequence corresponding to the candidate E-PDCCH from the initial scrambling code sequence, where the different aggregation levels are i , ' , : , - 7 ^40_ , , . ' , , , , and .

The apparatus according to claim 71, wherein the initial sequence subunit is specifically configured to obtain an initial scrambling code sequence according to a bit length occupied by a maximum search space of the receiving device.

The apparatus according to claim 71 or 72, wherein, for a starting position of a scrambling code sequence corresponding to the candidate E-PDCCH of different aggregation levels, a sequence length of the interval between the starting positions A non-integer multiple of the bit length included in the number of eCCEs corresponding to each aggregation level.

74. Apparatus according to any one of claims 60 to 73, wherein said scrambling code sequence.

The apparatus according to any one of claims 57 to 74, wherein the detecting unit comprises:

a selection subunit, configured to select one E-PDCCH from the multiple candidate E-PDCCHs; and a coding subunit, configured to use the scrambling code sequence corresponding to the selected E-PDCCH to select the E-PDCCH The signal carried by the PDCCH is decoded.

The apparatus according to claim 75, wherein the detecting unit further comprises: a correct processing subunit, configured to: after the decoding subunit obtains a correct decoding response, obtain the decoded signal of;

a re-checking processing unit, configured to: when the decoding sub-unit obtains an erroneous decoding response, excluding the selected E-PDCCH from the plurality of candidate E-PDCCHs, and performing the blind detection again .