WO2018098691A1

WO2018098691A1 - Control channel generation method, control channel detection method, and related apparatus

Info

Publication number: WO2018098691A1
Application number: PCT/CN2016/108042
Authority: WO
Inventors: 武雨春; 冯淑兰
Original assignee: 华为技术有限公司
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2018-06-07

Abstract

Disclosed in embodiments of the present invention are a control channel generation method, control channel detection method, and related apparatus, configured to reduce computation and power consumption of blind detection. The control channel generation method of an embodiment of the present invention comprises: an encoding apparatus filling a first output sequence having a length of N-K bits and target downlink control information (DCI) having a length of K bits at a frozen position and an information position, respectively, to perform Polar encoding and obtain an encoded PDCCH having a length of N bits, wherein generation of the first output sequence is at least based on a part or all of the following information: an identifier code of a target terminal, an aggregation level (AL) of a target PDCCH, and a length of target DCI; and the encoding apparatus modulating the encoded PDCCH and sending the same to a decoding apparatus via a channel.

Description

Control channel generation method, control channel detection method and related device

Technical field

The present invention relates to the field of communications, and in particular, to a control channel generation method, a control channel detection method, and related devices.

Background technique

In the downlink service data transmission of the LTE (Long Term Evolution) system, a plurality of MSs (Mobile Stations) in one cell dynamically multiplex time-frequency resources. The time-frequency resources occupied by a certain MS are indicated by a PDCCH (Physical Downlink Control Channel) corresponding to the MS. The PDCCH is designed to adapt to different formats of DCI (Downlink Control Information) under different channel conditions by designing a different number of CCEs (Control Channel Elements). When the MS demodulates the PDCCH, the number of CCEs, the DCI format information, and the information start position are unknown. That is, the MS does not know what format the current DCI is transmitting, and does not know where the information is needed. Therefore, the MS needs to detect all possible situations by blind detection to obtain the PDCCH information corresponding to the MS, and then further pass. The PDCCH obtains PDSCH information corresponding to the own MS. The existing PDCCH in LTE adopts TBCC coding. When the MS performs blind detection on a certain DCI format, the search space of the MS includes public space and dedicated space. The MS has to perform 6 blind detections in the public space. 16 blind detections are performed, and each DC detection is performed with two DCI Size convolutional decodings, so a maximum of 44 convolutional decoding operations are performed, which is high in complexity and power consumption. Therefore, how to reduce the power consumption of the PDCCH is an important issue.

FEC (Forward Error Correction) coding is a key technology in wireless communication by encoding source information and adding certain redundant information to resist errors in channel transmission. The location of the general communication system and FEC encoding and FEC decoding in the system is shown in Figure 1. Polar Codes is a new type of channel dependent FEC encoding. It is processed by Polar Codes from N identical channels to obtain N polarized channels. When N→∞, these N poles The Bass parameter of the channel is either 0 (good channel) or 1 (bad channel). In practical applications, Polar Codes calculates the reliability of all N=2 ⁿ polarized channels for different channels, and then selects K highly polarized channels, and sets the position index corresponding to these polarized channels. Called Information Set. When Polar Codes is encoded, K information symbols are placed at the corresponding positions of the Information Set, and the remaining (NK) positions are fixed known symbols known to both the encoding and the decoding, which are called Frozen Sets.

In the prior art, the amount of computation and power consumption of the PDCCH is reduced by using Polar Codes. As shown in FIG. 2, the Frozen Set is set to all 0s at the transmitting end, the Information Set is filled with DCI information, and then the sequence combined with the Information Set and the Frozen Set is input into the Polar encoder for encoding, and the encoded output is modulated and transmitted to the receiving end. The receiving end performs decoding, and the decoded input has two, one is the all-zero of the Frozen Set (the location corresponding to the Frozen Set is known to both the transmitting end and the receiving end), and the other is the received corresponding PDCCH blind detection. AL (Aggregation Level) data. If the currently detected PDCCH AL is different from the AL required by the receiving end, the corresponding code rate is also different. Since the Polar decoding is sequential decoding, that is, the first bit is translated first, then the second one, the third one..., as long as the M is translated, the LM (Likelyhood Metric) value is lower than the gate. The limit value, where the LM value is a parameter for measuring the similarity between the received data and the expected PDCCH data by the decoding end, and the larger the similarity is, the larger the LM value is, and the smaller the similarity is, the smaller the LM value is, the receiving is. Therefore, the current PDCCH is determined to be an invalid PDCCH, that is, the DCI information carried by the PDCCH is not the DCI information required by the MS, and the current Polar decoding is stopped.

However, due to the characteristics of the Polar code, the probability that some of the previous Bits are Frozen Set bits is large. In the prior art, the Frozen Set fills in 0, so that even if the AL is different, the difference between the previous Bits and the different ALs is not too obvious. For example, when the code length is N=8 and the DCI information length is K=3, the Information set is {3,6,7}, and the Frozen Set is {0,1,2,4,5}, and the first M positions can be seen. Most of them are Frozen Set elements. For example, the first M=5 elements {0,1,2,3,4} are {0,1,2,4} are Frozen Set elements. Therefore, no matter which AL, the first M u0 are decoded, u1...u(M-1) is mostly 0, and the Frozen set at the receiving end is filled with 0, so the LM value will not be significantly different due to different AL. It is difficult to determine whether the current PDCCH is a valid PDCCH according to the decoding result of the smaller pre-M bits length.

Summary of the invention

Embodiments of the present invention provide a control channel generation method, a control channel detection method, and related devices, which are used to save computational power and power consumption of blind detection.

A first aspect of the embodiments of the present invention provides a control channel generating method, including:

In order to reduce the amount of computation and power consumption of the blind detection, the embodiment of the present invention adopts a Polar code, and the encoding device fills the first output sequence and the target DCI into the freeze position and the information position respectively to perform Polar coding processing, wherein the target DCI length is K bits. The length of the first output sequence is (NK) bits, and the first output sequence is generated by the encoding device according to at least one or more of the following information: the identifier of the target terminal, the convergence level of the target PDCCH, and the length of the target DCI. Then, the encoding device obtains the encoded PDCCH having a length of N bits. The encoding device then modulates the encoded PDCCH and transmits it to the decoding device through the channel. In the embodiment of the present invention, the generating factor of the first output sequence includes at least one of an identifier of the target terminal, an aggregation level AL of the target PDCCH, a length of the target DCI information, and the like, and the encoding device fills in the first output sequence. The frozen position, the target DCI is filled in the information position, and then Polar coded to generate an encoded PDCCH of length N bits, which is then sent by the transmitting unit to the decoding device. Since the sequence generated by any two different generated seeds in the same manner will be greatly different, in a smaller M ≤ N bits, the decoding device can distinguish the to-be-transmitted according to the obtained decoding result. Whether the PDCCH is a valid PDCCH sent to itself can greatly save the computational complexity and power consumption of the blind detection.

With reference to the first aspect of the embodiments of the present invention, in a first implementation manner of the first aspect of the embodiments of the present disclosure, the encoding device sets a first output sequence of length (NK) bits and target control information of length K bits. Before the DCI is filled in the frozen position and the information position to perform the Polar coding and modulation processing, the embodiment of the present invention further includes:

The encoding device generates a first base sequence according to the first blind detection parameter, where the first blind detection parameter is generated according to at least one or more of the following information: the identifier of the target terminal, the convergence level AL of the target PDCCH, and the length of the target DCI. . After the encoding device generates the first base sequence, the first output sequence is generated according to the first base sequence.

In this implementation, the encoding device generates a first base sequence according to the obtained first blind detection parameter, and then generates a first output sequence from the first base sequence, so that the implementation steps of the embodiment of the present invention are more clear and complete.

With reference to the first implementation manner of the first aspect of the embodiment of the present invention, in the second implementation manner of the first aspect of the embodiment of the present disclosure, the generating, by the encoding device, the first output sequence according to the first base sequence includes:

If the encoding device detects that the length of the first base sequence is less than L bits, wherein the L bit is the length of the random number generator, the encoding device complements the specific sequence in the first base sequence until the first base sequence length is L bits. The encoding device then fills the first base sequence of length L bits as an initial value into the L-bit long random number generator, and the random number generator outputs the first output sequence.

In this implementation, the encoding device obtains the first output sequence by using a random number generator of length L bits, and illustrates the manner in which the first output sequence is generated according to the first base sequence, so that the embodiment of the present invention is more operable.

With reference to the first implementation manner of the first aspect of the embodiment of the present invention, in a third implementation manner of the first aspect of the embodiment of the present disclosure, the generating, by the encoding device, the first output sequence according to the first base sequence includes:

The encoding device generates the first output sequence by the first base sequence according to a preset rule.

In this implementation manner, the manner in which the encoding device generates the first output sequence according to the first base sequence further includes adding an achievable manner of the embodiment of the present invention by using a preset rule.

A second aspect of the embodiments of the present invention provides a method for detecting a control channel, including:

The decoding device performs demodulation and Polar decoding processing on the received PDCCH according to the second output sequence, where the second output sequence is generated according to at least one or more of the following information: an identification code of the decoding device, and decoding The convergence level of the PDCCH of the current blind detection candidate of the device, the DCI length of the current blind detection candidate of the decoding device, and the length of the Polar code of the received PDCCH is N bits, and then the decoding device acquires the first M bits of the received PDCCH. As a result of the decoding, it is apparent that M is a positive integer not greater than N. In the embodiment of the present invention, the generating factor of the second output sequence includes at least one of an identification code of the decoding device, a convergence level of the PDCCH of the current blind detection candidate of the decoding device, and a DCI length of the current blind detection candidate of the decoding device. The decoding device performs demodulation and Polar decoding processing on the received PDCCH. Since the sequence generated by any two different generated seeds in the same manner will be greatly different, the smaller M ≤ N bits Therefore, the decoding device can greatly reduce the computational complexity and power consumption of the blind detection according to the obtained decoding result.

With reference to the second aspect of the embodiments of the present invention, in a first implementation manner of the second aspect of the embodiment, the decoding device solves the received physical downlink control channel PDCCH according to the second output sequence. The embodiment of the present invention further includes: after reconciling the Polar decoding process to obtain the first M-bit decoding result of the received PDCCH, the embodiment of the present invention further includes:

The decoding device determines, according to the result of the previous M-bit decoding, whether the received PDCCH is a valid PDCCH, that is, whether it is a PDCCH required by the decoding device, and if the decoding device considers that the received PDCCH is not a valid PDCCH, the decoding device The decoding of the received PDCCH is terminated.

In this implementation, the decoding device determines, according to the previous M-bit decoding result, that if the received PDCCH is not a valid PDCCH, the decoding of the received PDCCH is terminated. The operational steps of the embodiments of the present invention are completed.

With reference to the first implementation manner of the second aspect of the embodiment of the present invention, in a second implementation manner of the second aspect of the embodiment, the decoding device demodulates the received PDCCH according to the second output sequence, and the Polar The decoding process, before acquiring the first M-bit decoding result of the received PDCCH, the embodiment of the present invention further includes:

The decoding device generates a second base sequence according to the second blind detection parameter, where the second blind detection parameter is generated according to at least one or more of the following information: an identifier of the decoding device, and a PDCCH of the current blind detection candidate of the decoding device The convergence level and the DCI length of the current blind detection candidate of the decoding device. After the decoding device generates the second base sequence, the second output sequence is generated according to the second base sequence.

In this implementation, the decoding device generates a second base sequence according to the obtained second blind detection parameter, and then generates a second output sequence from the second base sequence, so that the implementation steps of the embodiment of the present invention are more clear and complete.

With the second implementation of the second aspect of the embodiment of the present invention, in a third implementation manner of the second aspect of the embodiment of the present invention, the decoding device generates a second length (NK) bit according to the second base sequence. The output sequence includes:

If the decoding device detects that the length of the second base sequence is less than L bits, wherein the L bit is the length of the random number generator, the decoding device complements the specific sequence in the second base sequence until the length of the second base sequence is The L bit, the encoding device further fills the L-bit second base sequence as an initial value into the L-bit long random number generator, and the random number generator outputs the second output sequence.

In this implementation, the decoding device obtains the second output sequence according to the L-bit random number generator, and illustrates the manner in which the second output sequence is generated according to the second base sequence, so that the embodiment of the present invention is further It is operable.

In a fourth implementation manner of the second aspect of the embodiment of the present invention, the decoding device generates a second length (NK) bit according to the second base sequence. The output sequence includes:

The decoding device generates the second output sequence by generating the second base sequence according to a preset rule.

In this implementation manner, the manner in which the decoding device generates the second output sequence according to the second base sequence further includes adding an achievable manner of the embodiment of the present invention by using a preset rule.

With reference to any one of the first to fourth implementation manners of the second aspect of the embodiments of the present invention, in a fifth implementation manner of the first aspect of the embodiment, the decoding device is configured according to the second output sequence Before the decoding of the first M bits of the received PDCCH, the embodiment of the present invention further includes:

The decoding device receives the received PDCCH, and the received PDCCH is transmitted by the encoding device.

In this implementation manner, the decoding device receives the PDCCH sent by the encoding device, and completes the process of the embodiment of the present invention, so that the embodiment of the present invention is more operable.

With reference to the fifth implementation manner of the second aspect of the embodiment of the present invention, in a sixth implementation manner of the second aspect of the embodiment, the decoding device determines, according to the previous M-bit decoding result, whether the received PDCCH is After the effective PDCCH, the embodiment of the present invention further includes:

After the decoding device determines that the received PDCCH is a valid PDCCH according to the previous M-bit decoding result, that is, the decoding device determines that the received PDCCH is a required PDCCH, the decoding device continues to decode the received PDCCH.

In this implementation manner, when the decoding device considers that the received PDCCH is a valid PDCCH, the decoding device continues to decode, so that the embodiment of the present invention is more logical in the step flow.

With reference to the fifth implementation manner of the second aspect of the embodiment of the present invention, in a seventh implementation manner of the second aspect of the embodiment, the decoding device determines, according to the previous M-bit decoding result, whether the received PDCCH is The valid PDCCH includes:

After obtaining the decoding result of the first M bits, the decoding device determines whether the decoding result of the previous M bits is lower than a threshold; if the decoding result of the first M bits is less than the threshold, the decoding device considers that the received PDCCH is not valid. PDCCH.

In this implementation, the decoding apparatus is configured to determine whether the received PDCCH is a valid PDCCH according to the result of the previous M-bit decoding, and the implementation manner of the embodiment of the present invention is added.

A third aspect of the embodiments of the present invention provides an encoding device, including:

a padding unit, configured to fill a first output sequence of length (NK) bits and a target control information DCI of length K bits into a freeze position and an information position, respectively, to perform a Polar coding process, to obtain a coded length of N bits. a PDCCH, the first output sequence is generated according to at least one or more of the following information: an identifier of the target terminal, an aggregation level AL of the target physical downlink control channel PDCCH, and a length of the target DCI;

And a sending unit, configured to: after the encoded PDCCH is modulated, sent to the decoding device by using a channel.

In this implementation, generating a seed of the first output sequence includes at least one of an identifier of the target terminal, an aggregation level AL of the target PDCCH, a length of the target DCI information, and the like, and the filling unit fills the first output sequence into a freeze. The location, the target DCI fills in the information location, and then performs Polar coding to generate an encoded PDCCH of length N bits, which is then sent by the transmitting unit to the decoding device. Since any two different generated seeds will have a larger difference in the sequence generated in the same way, the decoding device can obtain the first M-bit decoding result in a smaller M ≤ N bits, thereby greatly saving The amount of computation and power consumption for blind detection.

With reference to the third aspect of the embodiments of the present invention, in a first implementation manner of the third aspect of the embodiments, the encoding device further includes:

a first generating unit, configured to generate a first base sequence according to the first blind detection parameter, where the first blind detection parameter is generated according to at least one or more of the following information: an identifier of the target terminal, an AL of the target PDCCH, and a target DCI length;

And a second generating unit, configured to generate a first output sequence according to the first base sequence.

In this implementation, the first generating unit generates a first base sequence according to the obtained first blind detection parameter, and the second generating unit generates a first output sequence by using the first base sequence, so that the implementation steps of the embodiment of the present invention are more clear and complete. .

With reference to the first implementation manner of the third aspect of the embodiment of the present invention, in a second implementation manner of the third aspect of the embodiment of the present disclosure, the second generating unit includes:

a first supplemental module, configured to: when the length of the first base sequence is less than L bits, the L bits are random a length of the number generator, complementing the specific sequence in the first base sequence until the length of the first base sequence is L bits;

And a first filling module, configured to fill the first base sequence as an initial value into the random number generator to generate a first output sequence.

In this implementation, the first padding module obtains the first output sequence by using a random number generator of length L bits, and illustrates the manner in which the first output sequence is generated according to the first base sequence, so that the embodiment of the present invention is more operable. Sex.

With reference to the first implementation manner of the third aspect of the embodiment of the present invention, in a third implementation manner of the third aspect of the embodiment of the present disclosure, the second generating unit includes:

And a first generating module, configured to generate the first output sequence according to the preset rule according to the first base sequence.

In this implementation manner, the manner in which the encoding device generates the first output sequence according to the first base sequence further includes that the first generation module generates the preset rule, and the achievable manner of the embodiment of the present invention is added.

A fourth aspect of the embodiments of the present invention provides a decoding apparatus, including:

An acquiring unit, configured to perform demodulation and a Polar decoding process on the received PDCCH according to the second output sequence, to obtain a first M-bit decoding result of the received PDCCH, where the second output sequence is based on at least one of the following information or Multi-generation: the identification code of the decoding device, the convergence level of the PDCCH of the current blind detection candidate of the decoding device, and the DCI length of the current blind detection candidate of the decoding device. The received PDCCH has a Polar coding length of N bits, and N is not A positive integer less than M.

In this implementation manner, generating the seed of the second output sequence includes at least one of an identifier of the decoding device, a convergence level of the PDCCH of the current blind detection candidate of the decoding device, and a DCI length of the current blind detection candidate of the decoding device. . Since the sequence generated by any two different generated seeds in the same way will be greatly different, in a smaller M ≤ N bits, the acquiring unit can obtain the decoding result of the first M bits, thereby greatly Saves the amount of computation and power consumption for blind detection.

With reference to the fourth aspect of the embodiments of the present invention, in a first implementation manner of the fourth aspect of the embodiments, the decoding device further includes:

a determining unit, configured to determine, according to the previous M-bit decoding result, whether the received PDCCH is a valid PDCCH;

The terminating unit, if not, is used to terminate decoding the received PDCCH.

In this implementation manner, the determining unit determines, according to the previous M-bit decoding result, that if the received PDCCH is not a valid PDCCH, the terminating unit terminates decoding the received PDCCH. The operational steps of the embodiments of the present invention are completed.

With reference to the first implementation manner of the fourth aspect of the embodiments of the present invention, in a second implementation manner of the fourth aspect of the embodiments of the present disclosure, the decoding device further includes:

a third generating unit, configured to generate a second base sequence according to the second blind detection parameter, where the second blind detection parameter includes at least part or all of the following information: an identifier of the decoding device, and a PDCCH of the current blind detection candidate of the decoding device The convergence level and the DCI length of the current blind detection candidate of the decoding device;

And a fourth generating unit, configured to generate a second output sequence of length (N-K) bits according to the second base sequence.

In this implementation, the third generating unit generates a second base sequence according to the obtained second blind detection parameter, and the fourth generating unit generates the second output sequence by the second base sequence, so that the implementation steps of the embodiment of the present invention are more clear and complete. .

With reference to the second implementation manner of the fourth aspect of the embodiment of the present invention, in a third implementation manner of the fourth aspect of the embodiment of the present disclosure, the fourth generating unit includes:

a second supplementary module, when the length of the second base sequence is less than L bits, the L bit is a length of the random number generator, and is used to complement the specific sequence in the second base sequence until the length of the second base sequence is L bits;

And a second filling module, configured to fill the second base sequence as an initial value into the L-bit long random number generator to generate a second output sequence.

In this implementation, the second padding module obtains the second output sequence according to the L-bit random number generator, and illustrates the manner in which the second output sequence is generated according to the second base sequence, so that the embodiment of the present invention is more operable. Sex.

And a second generating module, configured to generate a second output sequence according to a preset rule by using the second base sequence.

In this implementation, the manner of generating the second output sequence according to the second base sequence further includes the second generation module generating by using preset rules, which adds an achievable manner of the embodiment of the present invention.

In combination with any one of the first to third implementations of the fourth aspect of the embodiments of the present invention, In a fourth implementation manner of the fourth aspect of the embodiment, the decoding device further includes:

And a receiving unit, configured to receive the received PDCCH sent by the encoding device.

In this implementation manner, the receiving unit receives the received PDCCH sent by the encoding device, and completes the process of the embodiment of the present invention, so that the embodiment of the present invention is more operable.

With reference to the fifth implementation manner of the fourth aspect of the embodiments of the present invention, in a sixth implementation manner of the fourth aspect of the embodiments, the decoding device further includes:

The decoding unit, if the decoding device determines that the received PDCCH is a valid PDCCH according to the previous M-bit decoding result, the decoding device continues to decode the N-bit received PDCCH.

In this implementation manner, when the PDCCH is considered to be a valid PDCCH, the decoding unit continues to decode the PDCCH, so that the embodiment of the present invention is more logical in the step flow.

With reference to the fifth implementation manner of the fourth aspect of the embodiment of the present invention, in a seventh implementation manner of the fourth aspect of the embodiment, the determining unit includes:

a determining module, configured to determine whether the first M-bit decoding result is lower than a threshold;

The determining module is configured to determine that the received PDCCH is not a valid PDCCH, if the determining module determines that the previous M-bit decoding result is lower than a threshold.

In this implementation manner, the determining unit determines whether the received PDCCH is a valid PDCCH according to the previous M-bit decoding result, and adds an implementation manner of the embodiment of the present invention.

In the technical solution provided by the embodiment of the present invention, the encoding device fills the first output sequence of length (NK) bits and the target control information DCI of length K bits into a freeze position and an information position, respectively, for performing Polar coding and modulation processing. Obtaining an encoded PDCCH of length N bits, wherein the first output sequence is generated according to at least one or more of the following information: an identifier of the target terminal, an aggregation level AL of the target physical downlink control channel PDCCH, or a length of the target DCI The encoding device transmits the encoded PDCCH to the decoding device, so that the decoding device demodulates and decodes the received PDCCH according to the second output sequence of length (NK) bits, and then obtains the decoded pre-M. The decoding result of the bits determines whether it is an invalid PDCCH. The generating of the second output sequence is based at least on part or all of the following information: the identification code of the decoding device, the convergence level of the PDCCH of the current blind detection candidate of the decoding device, or the DCI length of the current blind detection candidate of the decoding device, and the second output sequence Generation rules and The generation rules of an output sequence are the same, and the attributes of the second blind detection parameter are the same as those of the first blind detection parameter. In the embodiment of the present invention, the encoding device generates a first output sequence according to at least one of an identifier of the target terminal, an aggregation level AL of the target PDCCH, or a length of the target DCI information, and the like, and fills the first output sequence. Into the frozen position, the target DCI fills in the information position, and then performs Polar coding to generate an encoded PDCCH of length N bits, since the sequence generated by any two different generated seeds in the same manner will be greatly different, In the smaller M ≤ N bits, the decoding device can obtain the decoding result of the first M bits, thereby greatly reducing the computational complexity and power consumption of the blind detection.

DRAWINGS

FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention; FIG.

2 is another schematic diagram of a network architecture according to an embodiment of the present invention;

3 is a schematic diagram of an embodiment of a control channel generation method and a control channel detection method according to an embodiment of the present invention;

4 is a schematic diagram of an application scenario according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an embodiment of an encoding device according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of another embodiment of an encoding device according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of an embodiment of a decoding device according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of another embodiment of a decoding device according to an embodiment of the present invention; FIG.

9A is a schematic block diagram of an encoding device according to an embodiment of the present invention;

9B is a schematic structural diagram of an encoding device according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of an embodiment of a decoding device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

The terms "first", "second", "first" in the specification and claims of the present invention and the above drawings "three", "fourth", etc. (if present) are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It should be understood that the data so used may be interchanged where appropriate, as described herein. The embodiments can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, including a series of steps or The process, method, system, product, or device of the unit is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not explicitly listed or inherent to such processes, methods, products, or devices.

The embodiments of the present invention are applicable to various communication systems, and therefore, the following description is not limited to a specific communication system. Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service ( General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System ( Universal Mobile Telecommunication System, UMTS), etc.

For ease of understanding, an example is applied to the LTE system. In the LTE system, the PDCCH is used to carry the downlink control information of the MS, and the LTE divides the downlink control information into various DCI formats (Downlink Control Information Format), and the size of the data packet of the different downlink control information formats is not necessarily The same, you need to blindly check which transmission format is used. The base station does not explicitly inform the MS of the specific location of the PDCCH to be detected and the code rate used. The MS obtains its own PDCCH by adopting multiple attempts in the search space. In order to adapt to different channel environments, in the LTE system, the transmission space of the PDCCH adopts different aggregation levels, which respectively correspond to different transmission space sizes and different candidate PDCCH numbers. Because the size of the data packet to be detected is unknown and the number of CCEs occupied by the PDCCH carrying the data packet is unknown, the MS needs to identify the data packet transmitted in the PDCCH by multiple detection. In the design of LTE, the PDCCH blind detection of the MS needs to perform at most 44 convolutional decodings to detect all the PDCCH information corresponding to itself, and the complexity and power consumption are high.

In order to reduce the power consumption of the MS, in the prior art, Polar Codes are used to reduce the operation of the PDCCH. Quantity and power consumption. After the fax set is set to all 0s and then Polar coded, the coded output is modulated and sent to the receiving end. If the convergence level of the PDCCH to be detected and the convergence level of the PDCCH transmitted by the transmitting end are different at the receiving end, the corresponding The code rate is also different, so that the receiver can determine whether it is a valid PDCCH when decoding. However, since the Frozen Set at the transmitting end fills in 0, and the probability that the first few bits in the Polar code are Frozen Set bits is large, even if the aggregation level is different, the difference between the previous bits and the different aggregation levels is not obvious, which makes it difficult to The length of the preceding bit determines whether the PDCCH to be detected is a valid PDCCH.

Wherein, the Polar code is a linear block code, and the generation matrix is

B _N is a bit inversion matrix,

Multiplication for Kroneck. In G _N , the row vectors in which the row numbers in the set A are selected constitute the matrix G _N (A), and the remaining vectors constitute the matrix G _N (A ^c ). Then the Polar code is

x ₁ ^N is the encoded output bit, and the code length is N=2 ⁿ , where u _A is the information bit before encoding, and the length is K bits.

The frozen bit before encoding is (NK) bits in length and is a known bit. For the sake of simplicity, these frozen bits are always 0.

In view of this, an embodiment of the present invention provides a control channel generation method, a control channel detection method, and a related device according to the method. The control channel generation method includes: the coding device sets a first output sequence and length of length (NK) bits. The K-bit target control information DCI is respectively filled in the freeze position and the information position for Polar coding and modulation processing to obtain an encoded PDCCH of length N bits, and the first output sequence is based on at least one or more of the following information. Generating: the identifier of the target terminal, the convergence level AL of the target physical downlink control channel PDCCH, or the length of the target DCI; then the encoding device sends the encoded PDCCH to the decoding device.

For the sake of understanding, a specific process of the embodiment of the present invention is described below. Referring to FIG. 3, an embodiment of the method for generating a control channel in the embodiment of the present invention includes:

301. The encoding device generates a first base sequence according to the first blind detection parameter.

Taking the LTE system as an example, the encoding device obtains one or more of the following information: the identifier of the target terminal, the convergence level of the target PDCCH, or the length of the target DCI, where the target DCI transmitted on the target PDCCH is the encoding device. Corresponding to the information sent to the target terminal. In the prior art, the Raw Bits of the transmitting end in the Polar code is set to all 0s, which makes it difficult to determine whether the candidate PDCCH is a valid PDCCH according to the PDCCH of the previous smaller number of bits. In the embodiment of the invention, the information acquired by the encoding device is used as a generating factor of the Frozen Bits.

The encoding device uses the acquired information as the first blind detection parameter to form the first base sequence, and in actual application, when the first blind detection parameter is composed of multiple pieces of information, the order of the first base sequence is not limited. For example, when the first blind detection parameter includes the identifier of the target terminal and the convergence level of the target PDCCH, the identifier of the target terminal may be located in the front of the first base sequence, and the convergence level of the target PDCCH is located in the latter stage of the first base sequence. The aggregation level of the target PDCCH is located in the front stage of the first base sequence, and the convergence level of the target PDCCH is located in the back stage of the first base sequence, so the specific first blind detection parameter constitutes the composition of the first base sequence and is not arranged here. limited.

It should be noted that the identifier of the target terminal may be an RNTI (Ratio Network Temporary Identifier), an IMEI (International Mobile Equipment Identification Number), or a MEID (Mobile Equipment Identifier). ), etc., specifically not limited here.

In the embodiment of the present invention, the encoding device may be a macro base station (Macro eNobe B) or a small base station, such as pico, femto, etc., which is not limited herein.

302. The encoding device complements the specific sequence in the first base sequence until the length of the first base sequence is L bits.

After the encoding device generates the first base sequence, the encoding device generates a first output sequence according to the first base sequence. In the embodiment of the present invention, the first output sequence is generated by filling the first base sequence as an initial value into the random number generator and using the output of the random number generator as the first output sequence. Setting the length of the random number generator to be L bits. If the encoding device detects that the length of the first base sequence is less than L bits, the encoding device fills the specific sequence in the first base sequence until the first base sequence Complemented to L bits, and the specific sequence is a sequence known to both the encoding device and the decoding device.

It should be noted that, in practical applications, the specific sequence may be an all-one sequence, and the sequences in which 1 and 0 are alternated are, for example, 1010101..., 0101010, etc., so the specific specific sequence is not limited herein.

It can be understood that, in an actual application, the specific sequence may be arranged in front of the first base sequence before the complement, or may be arranged behind it. The specific arrangement is not limited herein.

303. The encoding device fills the first base sequence as an initial value into an L-bit long random number generator to generate a first output sequence.

When the length of the first base sequence is less than L bits, the encoding device complements the specific sequence in the first blind detection parameter After the first base sequence length is L bits or the first base sequence length is equal to L bits, the encoding device fills the first base sequence as an initial value into an L-bit long random number generator to generate a first output sequence. Polar coding is performed, and in Polar coding, N represents the code length of the codeword, and K represents the information bit, that is, the length of the Information Bits. In addition, the random number generator relies on a random number seed and a random algorithm to generate a random number. In a practical application, the random number generator may include a linear feedback shift register LFSR or a fast count register, which is not limited herein.

It should be noted that, by using step 302 and step 303 in the embodiment of the present invention, the first base sequence of length L bits is used as the initial value of the random number generator to generate a first output sequence of length (NK) bits, such as As shown in FIG. 4, the first base sequence is generated by the identifier of the target terminal, the convergence level indication of the target PDCCH, and the length indication of the target DCI, where the identifier length of the target terminal, the AL indication of the target PDCCH, and the length indication of the target DCI are respectively indicated. It is 16 bits, 2 bits and 4 bits, and the length of the random number generator is 24 bits, so the encoding device fills the first base sequence to 24 bits according to the all 1 sequence of 2 bits in length, and will complete the patch. The first base sequence is filled with the random number generator as an initial value, and the random number generator performs an exclusive OR operation on the corresponding value to output the first output sequence.

It can be understood that, in an actual application, the encoding device generates the first output sequence according to the first base sequence. For example, the encoding device generates the first output sequence according to the preset rule. Obviously, the preset rule A rule known to both an encoding device and a decoding device, wherein the preset rule may be to perform an exclusive OR operation or the same operation on the third sequence of the same length to obtain an output sequence, and output the output The sequence is complemented in a preset manner to the length of the (NK) bit, wherein the first sequence and the preset mode are both known by the encoding device and the decoding device, so the encoding device generates the first output sequence according to the first base sequence. The details are not limited herein.

304. The encoding device fills a first output sequence of length (N-K) bits and a target DCI of length K bits into a freeze location and an information location, respectively;

Polar coding selects a more reliable subchannel to transmit information bits sent by the source, and a less reliable subchannel is used to transmit frozen bits, wherein the frozen bits are bits having a fixed value and known by both the encoding device and the decoding device. After the encoding device generates the first output sequence of length (NK) bits according to the first base sequence, the first output sequence is filled into the frozen position as a frozen bit, and the target DCI sent to the target terminal is filled in as the information bit. Position for Polar encoding to get the encoding After the PDCCH.

The target DCI sent by the encoding device has various DCI format types for carrying various control information, including 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, and 3A. For example, DCI format 0 is used to schedule uplink transmissions and typically includes scheduling information fields such as modulation and coding scheme (MCS) indices, resource block allocation, hop flags, new data indicators, transmit power control (TPC) commands, and / or mix ARQ information. The user identity or user ID (UEID) is typically embedded within the CRC bits (eg, scrambling the CRC based on the UEID). DCI format 1A is a compact scheduling grant for scheduling a single transport block and includes fields similar to those in DCI format 0 and additional fields such as redundancy versions (RV). The DCI format 2A is used to schedule two transport blocks and the like in the downlink using open-loop MIMO, which is not limited herein.

305. The coding device performs Polar coding to obtain a coded PDCCH with a length of N bits.

After the encoding device fills the first output sequence and the target DCI into the frozen position and the information position, the encoder output is used as the encoded output of the PDCCH. To facilitate signal reception and transmission, the encoding device modulates the encoded output signal of the PDCCH. The digital modulated signal suitable for channel transmission is converted for transmission. The modulation and demodulation modes include BPSK, QPSK, and 64QAM, which are not limited herein.

306. The encoding device sends the encoded PDCCH to the decoding device.

After obtaining the coded PDCCH, the coding device sends the coded PDCCH to the decoding device. Since the transmission signal is subjected to different degrees of noise interference during transmission, bit deletion or inversion occurs, so that the coding can be known. The encoded PDCCH transmitted by the device is different from the PDCCH received by the decoding device. For example, at the transmitting end, the transmitted information sequence u ₁ ^{N is} encoded and modulated by the encoding device to generate x ₁ ^N =u ₁ ^N G _N , and x ₁ ^N is the sequence that enters the channel from the sender side, that is, the encoded PDCCH, G. _N is the generation matrix of the Polar code; at the receiving end, the sequence received by the decoding device is y ₁ ^N , and the decoding device demodulates y ₁ ^N as its decoding input, and obtains the output of the decoding device according to the decoding algorithm.

The sequence is an estimate of u ₁ ^N , which is the recovery of the transmission sequence by the decoding device.

In the embodiment of the present invention, the decoding device may include, but is not limited to, various types of terminal devices, such as a mobile phone, a tablet computer, and a notebook computer, which are not limited herein.

307. The decoding device generates a second base sequence according to the second blind detection parameter.

The decoding device acquires at least one or more of the following information: an identification code of the decoding device, a convergence level of the PDCCH of the current blind detection candidate of the decoding device, or a DCI length of the current blind detection candidate of the decoding device. The decoding device uses the acquired information as a second blind detection parameter. It can be understood that the second blind detection parameter corresponds to the first blind detection parameter acquired by the encoding device. If the first blind detection parameter acquired by the encoding device is the identifier of the target terminal and the length of the target DCI, the decoding is performed. The second blind detection parameter acquired by the device corresponds to the identification code of the decoding device and the DCI length of the current blind detection candidate of the decoding device, and the second blind detection parameter constitutes the composition sequence of the second base sequence and the first blind detection parameter. The composition of the first base sequence is arranged in the same order.

It should be noted that the identification code of the decoding device may be an RNTI (Ratio Network Temporary Identifier), an IMEI (International Mobile Equipment Identification Number), or a MEID (Mobile Equipment Identifier). The code and the like, and the identification code of the decoding device is the same as the identification code of the target terminal, that is, when the identification code of the target terminal is RNTI, the identification code of the decoding device is also the RNTI.

308. The decoding device complements the specific sequence in the second base sequence until the length of the second base sequence is L bits.

It can be understood that, after the decoding device generates the second base sequence, the decoding device generates the second output sequence according to the second base sequence in the same manner as the decoding device generates the first output sequence according to the first base sequence. Therefore, if the decoding device detects that the length of the second base sequence is less than the length L of the random number generator, the decoding device completes the specific sequence in the second base sequence until the second base sequence is added to the L a bit, and the specific sequence is a sequence known to both the encoding device and the decoding device, and the specific sequence of the second base sequence is the same as the specific sequence of the first base sequence, and the specific sequence is also arranged. same.

309. The decoding device fills the second base sequence as an initial value into an L-bit long random number generator to generate a second output sequence.

When the length of the second base sequence is less than L bits, the decoding device complements the specific sequence in the second blind detection parameter until the length of the second base sequence is L bits or the length of the second base sequence is equal to L bits, and the decoding device The second base sequence is filled with an L-bit long random number generator as an initial value to generate a second input The sequence is used for Polar decoding, and in Polar decoding, N represents the code length of the codeword, and K represents the length of the information bits, ie, Information Bits. In addition, the random number generator relies on a random number seed and a random algorithm to generate a random number. In a practical application, the random number generator may include a linear feedback shift register LFSR or a fast count register, which is not limited herein.

It should be noted that, by using step 308 and step 309 in the embodiment of the present invention, the decoding device generates a second output of length (NK) bits by using a second base sequence of L bit length as an initial value of the random number generator. sequence. It can be understood that, in practical applications, the decoding device generates a second output sequence according to the second base sequence. For example, the decoding device generates a second output sequence according to a preset rule. Obviously, the preset The rules are known to both the encoding device and the decoding device, wherein the preset rule may be to perform an exclusive OR operation or the same operation on the second sequence of the same length to obtain an output sequence, and The output sequence is complemented to a length of (NK) bits in a preset manner, wherein the first sequence and the preset mode are both known by the encoding device and the decoding device, so the decoding device generates the second output according to the second base sequence. The manner of the sequence is not limited herein.

It can be understood that the manner in which the decoding device generates the second output sequence according to the second base sequence is consistent with the manner in which the encoding device generates the first output sequence according to the first base sequence, that is, the encoding device fills in the first base sequence as an initial value. The random number generator obtains a first output sequence of length (NK) bits, and the decoding device also fills the second base sequence as an initial value into the same random number generator to obtain a second length (NK) bit. Output sequence.

It should be noted that, in this embodiment, the decoding device generates a second output sequence by using steps 307 to 309, and obtains the received PDCCH by using step 306, and there is no sequence of steps between the two processes. Step 306 to 309 may be performed first, or may be performed at the same time, which is not limited herein.

310. The decoding device performs demodulation and a Polar decoding process on the received PDCCH according to the second output sequence, and obtains a first M-bit decoding result of the received PDCCH.

After the decoding device generates the second output sequence, the second output sequence is used as a sequence corresponding to the freeze position. After receiving the PDCCH sent by the encoding device, the decoding device performs demodulation processing corresponding to the encoding device modulation process on the received PDCCH. After demodulating the received PDCCH, the decoding device performs the second output sequence and the received demodulated PDCCH as two inputs of the decoding device. SC (Successive Cancellation) decoding of the Polar code. Since the Polar code SC decoding adopts a bit-by-bit decoding method, the probability that several bits in front of the Polar code are frozen bits is large, and the generating factors of the first output sequence and the second output sequence include the identification code of the device and the convergence of the PDCCH. The length of the level or DCI, even if the identification code of the target terminal and the identification code of the decoding device have a slight difference and/or the convergence level is the same and/or the DCI length is the same, but it is generated as the initial value of the random number generator. Random sequences are very different. Therefore, after the decoding apparatus of the shorter M ≤ N bits, the decoding apparatus can identify whether it is a valid PDCCH expected by the decoding apparatus. In decoding, an LM (Likelyhood Metric) is defined. The size of the LM value is related to the similarity between the decoding information and the original information, that is, the information before encoding. The larger the similarity, the larger the value of LM. The LM value of the decoding result of the decoding device is used to determine whether the received PDCCH is a valid PDCCH.

311, the decoding device determines whether the first M-bit decoding result is lower than the threshold, and if so, step 312 is performed; if not, step 313 is performed;

The decoding device obtains the first M-bit decoding result, and compares the decoding result with the threshold value. Since the size of the LM value is related to the similarity between the decoding information and the original information, that is, the information before encoding, and the similarity is greater. The value of LM is also larger. Therefore, the smaller the similarity between the second output sequence and the first M bits of the Frozen Bits in the received PDCCH, the smaller the decoding result LM value of the first M bits. Therefore, if the decoding result is lower than the preset threshold, the decoding device infers that the similarity is small, and further determines that the PDCCH is an invalid PDCCH, and then performs step 312; if the decoding result is higher than a preset threshold If the value is large, and the decoding device infers that the PDCCH is a valid PDCCH, step 313 is performed.

312. The decoding device terminates decoding the received PDCCH.

When the current M-bit decoding result LM value is lower than the threshold, the decoding device considers that the received PDCCH is an invalid PDCCH, that is, a PDCCH that is not required by the decoding device, and then terminates decoding the received PDCCH.

313. The decoding device continues to decode the received PDCCH of N bits.

When the current M-bit decoding result is higher than the threshold, the decoding device considers that the received PDCCH is a valid PDCCH, that is, the received PDCCH is a PDCCH that is sent to the decoding device, and the decoding device continues to decode the remaining PDCCH. (NM) bits of the received PDCCH.

It should be noted that, in this embodiment, the LM and the decoding information and the original information are defined before the encoding. The similarity of information is related, and the greater the similarity, the larger the value of LM. In practical applications, LM can also be defined inversely, that is, the greater the similarity, the smaller the value of LM. The decoding device determines whether the decoding result of the previous M bits is lower than the second threshold. If the decoding threshold is lower than the second threshold, the decoding device considers that the received PDCCH is a valid PDCCH and continues decoding. The second threshold value is terminated when the decoding device considers that the received PDCCH is an invalid PDCCH. Therefore, the definition of LM is not limited here.

In the embodiment of the present invention, the identification code of the device, the convergence level of the PDCCH or the length of the DCI is used as a random number seed to generate a random sequence, and the generated random sequence is used as a Frozen Bits. Since the sequence of random numbers generated by any two different random number seeds is very different, the decoding device can efficiently distinguish whether it is a valid PDCCH sent to itself in a small pre-M bits, so that Greatly saves the amount of computation for blind detection.

In addition, in a practical application, when the decoding device detects the received PDCCH, the detection result of the PDCCH that is not originally sent to the decoding device can exceed the preset threshold or pass the CRC detection, so that the decoding is performed. The device mistakenly believes that the received PDCCH is a PDCCH required by the decoding device, and generates a false alarm condition. In the embodiment of the present invention, since the identification code of the device, the convergence level of the PDCCH, or the length of the DCI is used as a random number to generate a random sequence, and the generated random sequence is used as a Frozen Bits in the Polar code, then the target device is used. The PDCCH generated by the identification code, the convergence level of the target PDCCH, or the length of the target DCI is difficult to pass when detected by the non-target device, so the embodiment of the present invention can also reduce the false alarm probability.

The following describes the combination of the method for generating the control channel and the method for detecting the control channel in the embodiment of the present invention. The following describes the encoding device in the embodiment of the present invention. Referring to FIG. 5, an embodiment of the encoding device in the embodiment of the present invention is described. include:

The padding unit 501 is configured to fill the first output sequence of length (NK) bits and the target control information DCI of length K bits into the freeze position and the information position, respectively, to perform Polar coding processing, and obtain a code length of N bits. The PDCCH, the first output sequence is generated according to at least one or more of the following information: an identifier of the target terminal, an aggregation level AL of the target physical downlink control channel PDCCH, and a length of the target DCI;

The sending unit 502 is configured to: after the encoded PDCCH is modulated, send the channel to the decoding device Ready.

In the embodiment of the present invention, the generated seed of the first output sequence includes at least one of an identifier of the target terminal, an aggregation level AL of the target PDCCH, a length of the target DCI information, and the like, and the filling unit fills the first output sequence. The frozen position, the target DCI is filled in the information position, and then Polar coded to generate an encoded PDCCH of length N bits, which is then sent by the transmitting unit to the decoding device. Since any two different generated seeds will have a larger difference in the sequence generated in the same manner, the decoding device can obtain the received first M-bit decoding result in a smaller M ≤ N bits. The amount of computation and power consumption of blind detection can be greatly saved.

For the sake of understanding, the coding device in the embodiment of the present invention is described in detail below. On the basis of the foregoing FIG. 5, please refer to FIG. 6 , which is a schematic diagram of another embodiment of an encoding device according to an embodiment of the present invention. Can include:

The first generating unit 603 is configured to generate a first base sequence according to the first blind detection parameter, where the first blind detection parameter is generated according to at least one or more of the following information: an identifier of the target terminal, an AL of the target PDCCH, and a target. The length of the DCI;

The second generating unit 604 is configured to generate a first output sequence according to the first base sequence.

The second generating unit 604 can include:

The first supplementing module 6041 is configured to: when the length of the first base sequence is less than L bits, complement the specific sequence in the first base sequence until the length of the first base sequence is L bits, and the L bits are the length of the random number generator;

The first padding module 6042 is configured to fill the first base sequence as an initial value into the random number generator to generate a first output sequence.

The second generating unit 604 may further include:

The first generating module 6043 is configured to generate a first output sequence according to a preset rule according to the first base sequence.

In the embodiment of the present invention, the first generating unit generates the first base sequence according to the obtained first blind detection parameter, and the second generating unit generates the first output sequence by the first base sequence, so that the implementation steps of the embodiment of the present invention are clearer. complete. And the first padding module obtains the first output sequence by using a random number generator of length L bits, and illustrates the manner in which the first output sequence is generated according to the first base sequence, so that the present invention The embodiment is more operative.

The coding device in the embodiment of the present invention is described above with reference to FIG. 5 and FIG. 6. The following describes the decoding device in the embodiment of the present invention. Referring to FIG. 7, an embodiment of the decoding device in the embodiment of the present invention includes:

The obtaining unit 701 is configured to perform demodulation and a Polar decoding process on the received PDCCH according to the second output sequence, and obtain a first M-bit decoding result of the received PDCCH, where the second output sequence is based on at least one of the following information. Or multiple generation: the identification code of the decoding device, the convergence level of the PDCCH of the current blind detection candidate of the decoding device, and the DCI length of the current blind detection candidate of the decoding device, and the received PDCCH has a Polar coding length of N bits, where N is A positive integer not less than M.

In the embodiment of the present invention, the generated seed of the second output sequence includes at least one of an identification code of the decoding device, an aggregation level of the PDCCH of the current blind detection candidate of the decoding device, and a DCI length of the current blind detection candidate of the decoding device. The acquiring unit further performs demodulation and Polar decoding processing on the received PDCCH to obtain the first M-bit decoding result of the received PDCCH, and the sequence generated by any two different generated seeds in the same manner may be The difference is large, so in a small M ≤ N bits, the acquiring unit can obtain the first M-bit decoding result of the received PDCCH, thereby greatly reducing the computational complexity and power consumption of the blind detection.

For the sake of understanding, the decoding device in the embodiment of the present invention is described in detail below. Based on the foregoing FIG. 7, FIG. 8 is a schematic diagram of another embodiment of a decoding device according to an embodiment of the present invention. The code device can also include:

The determining unit 802 is configured to determine, according to the previous M-bit decoding result, whether the received PDCCH is a valid PDCCH;

The terminating unit 803, if not, is configured to terminate decoding the received PDCCH.

The decoding device in the embodiment of the present invention may further include:

The third generating unit 804 is configured to generate a second base sequence according to the second blind detection parameter, where the second blind detection parameter is generated according to at least one or more of the following information: the identification code of the decoding device, and the decoding device is currently blind Checking the convergence level of the candidate PDCCH and the DCI length of the current blind detection candidate of the decoding device;

The fourth generating unit 805 is configured to generate a second output sequence of length (N-K) bits according to the second base sequence.

The fourth generating unit 805 can include:

a second complementing module 8051, when the length of the second base sequence is less than L bits, is used to complement a specific sequence in the second base sequence until the length of the second base sequence is L bits, and the L bits are the length of the random number generator;

The second filling module 8052 is configured to fill the second base sequence as an initial value into the random number generator to generate a second output sequence.

The fourth generating unit 805 may further include:

The second generating module 8053 is configured to generate the second output sequence according to a preset rule by using the second base sequence.

The receiving unit 806 is configured to receive the received PDCCH sent by the encoding device.

The decoding unit 807, if the decoding device determines that the received PDCCH is a valid PDCCH according to the previous M-bit decoding result, the decoding device continues to decode the N-bit received PDCCH.

The determining unit 802 may further include:

The determining module 8021 is configured to determine whether the first M-bit decoding result is lower than a threshold value;

The determining module 8022 is configured to determine that the received PDCCH is not a valid PDCCH, if the determining module determines that the first M-bit decoding result is lower than a threshold.

In the embodiment of the present invention, the second generating unit generates the second base sequence according to the obtained second blind detection parameter, and the second generating unit generates the second output sequence by the second base sequence, so that the implementation steps of the embodiment of the present invention are clearer. complete. And the second padding module obtains the second output sequence by using the L-bit random number generator, and illustrates the manner in which the second output sequence is generated according to the second base sequence, so that the embodiment of the present invention is more operable.

In addition, in the actual application, when the determining unit detects the received PDCCH, the detection result of the PDCCH that is not originally sent to the decoding device can exceed the preset threshold or pass the CRC detection, so that the determining unit is wrong. It is considered that the received PDCCH is a PDCCH required by the decoding device, and a false alarm condition is generated. In the embodiment of the present invention, a random sequence is generated by using the identifier of the device, the convergence level of the PDCCH, or the length of the DCI as a random number seed, and the generated random sequence is used. The PDCCH generated based on the identifier of the target device, the convergence level of the target PDCCH, or the length of the target DCI is difficult to pass the detection when detected by the non-target device, so the embodiment of the present invention can also Reduce the probability of false alarms.

5 to FIG. 8 respectively describe the encoding device and the decoding device in the embodiment of the present invention from the perspective of the modular functional entity. The coding device and the decoding device in the embodiment of the present invention are detailed in terms of hardware processing. description.

First, the coding equipment:

FIG. 9A is a schematic block diagram showing the structure of an encoding apparatus according to an embodiment of the present invention, with reference to FIG. 9A. In the case of employing an integrated unit, FIG. 9A shows a possible structural diagram of the encoding apparatus involved in the above embodiment. The encoding device 900 includes a processing unit 902 and a communication unit 903. The processing unit 902 is configured to control and manage the actions of the encoding device. For example, the processing unit 902 is configured to support the encoding device to perform steps 301 to 306 in FIG. 3, and/or other processes for the techniques described herein. The communication unit 903 is for supporting communication between the encoding device and other network entities, such as the decoding device shown in FIG. The service gateway may further include a storage unit 901 for storing program codes and data of the encoding device.

The processing unit 902 can be a processor or a controller, and can be, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific). Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication unit 903 can be a communication interface, a transceiver, a transceiver circuit, etc., wherein the communication interface is a collective name and can include one or more interfaces, such as a transceiver interface. The storage unit 901 can be a memory.

When the processing unit 902 is a processor, the communication unit 903 is a communication interface, and the storage unit 901 is a memory, the encoding device according to the embodiment of the present invention may be the encoding device shown in FIG. 9B.

Referring to FIG. 9B, the encoding device 910 includes: a processor 912, a communication interface 913, and a storage device. Reservoir 911. Alternatively, the encoding device 910 may also include a bus 914. The communication interface 913, the processor 912, and the memory 911 may be connected to each other through a bus 914. The bus 914 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (abbreviated). EISA) bus and so on. The bus 914 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9B, but it does not mean that there is only one bus or one type of bus.

The above-described encoding device shown in FIG. 9A or 9B may be a macro base station (Macro eNobe B) or a small base station such as pico, femto, or the like.

Second, the decoding equipment:

FIG. 10 is a schematic block diagram showing the structure of a decoding apparatus according to an embodiment of the present invention. Refer to Figure 10. FIG. 10 is a schematic structural diagram of a decoding apparatus according to an embodiment of the present invention. The decoding apparatus 1000 may generate a large difference due to different configurations or performances, and may include one or more central processing units (central processing units, CPU) 1001 (eg, one or more processors) and memory 1009, one or more storage media 1008 that store application 1007 or data 1006 (eg, one or one storage device in Shanghai). Among them, the memory 1009 and the storage medium 1008 may be short-term storage or persistent storage. The program stored on the storage medium 1003 may include one or more modules (not shown), each of which may include a series of instruction operations in the server. Still further, the processor 1001 may be configured to communicate with the storage medium 1003 to perform a series of instruction operations in the storage medium 1003 on the identification code management device 1000.

The identification code management device 1000 may also include one or more power sources 1004, one or more wired or wireless network interfaces 1005, one or more input and output interfaces 1006, and/or one or more operating systems 1005, such as Windows ServerTM , Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and more.

The steps performed by the decoding device in the above embodiments may be based on the decoding device device structure shown in FIG.

The processor 1001 is configured to perform demodulation and a Polar decoding process on the received PDCCH according to the second output sequence, and obtain the first M-bit decoding result of the received PDCCH, by using an operation instruction stored in the memory 1009. The two output sequence is generated based on at least one or more of the following information: The identification code of the decoding device, the convergence level of the PDCCH of the current blind detection candidate of the decoding device, and the DCI length of the current blind detection candidate of the decoding device, the length of the received PDCCH is encoded as N bits, and N is not less than the M. Positive integer.

Optionally, in some embodiments of the invention,

The processor 1001 is further configured to perform step 311 and step 312 in FIG. 3, and details are not described herein again.

Optionally, in some embodiments of the invention,

The processor 1001 is further configured to perform step 307 in FIG. 3, and details are not described herein again.

Optionally, in some embodiments of the invention,

The processor 1001 is further configured to perform step 308 and step 309 in FIG. 3, and details are not described herein again.

Optionally, in some embodiments of the invention,

The processor 1001 is further configured to generate the second output sequence according to a preset rule by using the second base sequence.

Optionally, in some embodiments of the invention,

The processor 1001 is further configured to perform step 313 in FIG. 3, and details are not described herein again.

Optionally, in some embodiments of the invention,

The steps of the method or algorithm described in connection with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a control plane network element or a user plane network element. Of course, the processor and the storage medium may also exist as discrete components in the control plane network element or the user plane network element.

Those skilled in the art will appreciate that in one or more of the above examples, the present invention is implemented The functions described in the examples can be implemented in hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

The specific embodiments of the present invention have been described in detail with reference to the embodiments of the embodiments of the present invention. The scope of the present invention is defined by the scope of the present invention. Any modifications, equivalents, improvements, etc., which are included in the embodiments of the present invention, are included in the scope of the present invention.

Claims

A control channel generating method, comprising:

The encoding device fills the first output sequence of length (NK) bits and the target downlink control information DCI of length K bits into the freeze position and the information position, respectively, to perform Polar coding processing, and obtain a coded physical downlink with a length of N bits. a control channel PDCCH, the first output sequence being generated according to at least one or more of the following information: an identifier of the target terminal, an aggregation level AL of the target PDCCH, and a length of the target DCI;

The encoding device modulates the encoded PDCCH and transmits it to a decoding device through a channel.
The control channel generating method according to claim 1, wherein the encoding device fills a first output sequence of length (NK) bits and target control information DCI of length K bits into a freeze position and an information position, respectively. Before performing the Polar coding and modulation processing, the method further includes:

The encoding device generates a first base sequence according to the first blind detection parameter, and the first blind detection parameter is generated according to at least one or more of the following information: an identifier of the target terminal, an AL of the target PDCCH The length of the target DCI;

The encoding device generates the first output sequence according to the first base sequence.
The control channel generating method according to claim 2, wherein the generating, by the encoding device, the first output sequence according to the first base sequence comprises:

When the length of the first base sequence is less than L bits, the encoding device complements the specific sequence in the first base sequence until the length of the first base sequence is the L bits, and the L bits are random number generators length;

The encoding device fills the first base sequence as an initial value into the random number generator to generate the first output sequence.
The control channel generating method according to claim 2, wherein the generating, by the encoding device, the first output sequence according to the first base sequence comprises:

The encoding device generates the first output sequence according to a preset rule according to the first base sequence.
A control channel detection method, comprising:

The decoding device performs demodulation and Polar decoding processing on the received physical downlink control channel PDCCH according to the second output sequence, and obtains a first M-bit decoding result of the received PDCCH, where the second output sequence is at least according to the following One or more generations of information: an identification code of the decoding device, a convergence level of a PDCCH of a current blind detection candidate of the decoding device, and a DCI length of a current blind detection candidate of the decoding device, the receiving The PDCCH has a Polar coding length of N bits, and the N is a positive integer not less than the M.
The control channel detecting method according to claim 5, wherein the decoding device performs demodulation and Polar decoding processing on the received physical downlink control channel PDCCH according to the second output sequence, and acquires the received After the first M-bit decoding result of the PDCCH, the method further includes:

Decoding, by the decoding device, whether the received PDCCH is a valid PDCCH according to the previous M-bit decoding result;

If not, the decoding device terminates decoding the received PDCCH.
The control channel detecting method according to claim 6, wherein the decoding device performs demodulation and Polar decoding processing on the received PDCCH according to the second output sequence, and acquires the front M of the received PDCCH. Before the bit decoding result, the method further includes:

The decoding device generates a second base sequence according to the second blind detection parameter, and the second blind detection parameter is generated according to at least one or more of the following information: an identifier of the decoding device, the decoding The convergence level of the PDCCH of the current blind detection candidate of the device, and the DCI length of the current blind detection candidate of the decoding device;

The decoding device generates the second output sequence of length (N-K) bits according to the second base sequence.
The control channel detecting method according to claim 7, wherein the decoding device generates the second output sequence of length (N-K) bits according to the second base sequence, including:

When the length of the second base sequence is less than the L bit, the decoding device complements the specific sequence in the second base sequence until the length of the second base sequence is the L bit, the L bit The length of the random number generator;

The decoding device fills the second base sequence as an initial value into the random number generator to generate a second output sequence.
The control channel detecting method according to claim 7, wherein the decoding device generates the second output sequence of length (N-K) bits according to the second base sequence, including:

The decoding device generates the second output sequence according to a preset rule by the second base sequence.
The control channel detecting method according to any one of claims 6 to 9, wherein before the decoding device decodes the first M bits of the received PDCCH according to the second output sequence, the method further include:

The decoding device receives the received PDCCH sent by the encoding device.
The method for detecting a control channel according to claim 10, wherein, after the decoding device determines whether the received PDCCH is a valid PDCCH according to the result of the pre-M bit decoding, the method further includes:

If so, the decoding device continues to decode the received PDCCH of the N bits.
The control channel detecting method according to claim 10, wherein the determining, by the decoding device, whether the received PDCCH is a valid PDCCH according to the pre-M bit decoding result comprises:

Decoding, by the decoding device, whether the first M-bit decoding result is lower than a threshold;

If yes, the decoding device determines that the received PDCCH is not the valid PDCCH.
An encoding device, comprising:

a padding unit, configured to fill a first output sequence of length (NK) bits and a target control information DCI of length K bits into a freeze position and an information position, respectively, to perform a Polar coding process, to obtain a coded length of N bits. a PDCCH, the first output sequence is generated according to at least one or more of the following information: an identifier of the target terminal, an aggregation level AL of the target physical downlink control channel PDCCH, and a length of the target DCI;

And a sending unit, configured to: after the modulated PDCCH is modulated, sent to a decoding device by using a channel.
The encoding device according to claim 13, wherein the encoding device further comprises:

a first generating unit, configured to generate a first base sequence according to the first blind detection parameter, where the first blind detection parameter is generated according to at least one or more of the following information: an identifier of the target terminal, the target AL of the PDCCH, length of the target DCI;

a second generating unit, configured to generate the first output sequence according to the first base sequence.
The encoding device according to claim 14, wherein the second generating unit comprises:

a first supplementing module, configured to: when the length of the first base sequence is less than L bits, complement a specific sequence in the first base sequence until the length of the first base sequence is the L bits, the L bits The length of the random number generator;

And a first filling module, configured to fill the first base sequence as an initial value into the random number generator to generate the first output sequence.
The encoding device according to claim 15, wherein the second generating unit comprises:

And a first generating module, configured to generate the first output sequence according to the preset rule according to the first base sequence.
A decoding device, comprising:

An acquiring unit, configured to perform demodulation and a Polar decoding process on the received physical downlink control channel PDCCH according to the second output sequence, to obtain a first M-bit decoding result of the received PDCCH, where the second output sequence is at least Generating according to one or more of the following information: an identifier of the decoding device, a convergence level of a PDCCH of a current blind detection candidate of the decoding device, and a DCI length of a current blind detection candidate of the decoding device, The length of the Polar code of the received PDCCH is N bits, and the N is a positive integer not less than the M.
The decoding device according to claim 17, wherein the decoding device further comprises:

a determining unit, configured to determine, according to the pre-M bit decoding result, whether the received PDCCH is a valid PDCCH;

The terminating unit, if not, is used to terminate decoding the received PDCCH.
The decoding device according to claim 18, wherein said decoding device further comprises include:

a third generating unit, configured to generate a second base sequence according to the second blind detection parameter, where the second blind detection parameter is generated according to at least one or more of the following information: an identifier of the decoding device, the a convergence level of a PDCCH of a current blind detection candidate of the decoding device, and a DCI length of a current blind detection candidate of the decoding device;

And a fourth generating unit, configured to generate a second output sequence of length (N-K) bits according to the second base sequence.
The decoding device according to claim 19, wherein the fourth generating unit comprises:

a second supplemental module, when the length of the second base sequence is smaller than the L bit, for complementing a specific sequence in the second base sequence until the length of the second base sequence is the L bit, the L bit The length of the random number generator;

And a second filling module, configured to fill the second base sequence as an initial value into the random number generator to generate a second output sequence.
The decoding device according to claim 19, wherein the fourth generating unit comprises:

And a second generating module, configured to generate the second output sequence according to a preset rule by using the second base sequence.
The decoding device according to any one of claims 18 to 21, wherein the decoding device further comprises:

And a receiving unit, configured to receive the received PDCCH sent by the encoding device.
The decoding device according to claim 22, wherein the decoding device further comprises:

a decoding unit, if the decoding device determines, according to the previous M-bit decoding result, that the received PDCCH is a valid PDCCH, the decoding device continues to decode the received N-bit PDCCH.
The decoding device according to claim 22, wherein the determining unit comprises:

a determining module, configured to determine whether the first M-bit decoding result is lower than a threshold;

And determining, if the determining module determines that the first M-bit decoding result is lower than the threshold, determining that the received PDCCH is not the valid PDCCH.