CN109391349B - Method and apparatus for cyclic redundancy check - Google Patents

Method and apparatus for cyclic redundancy check Download PDF

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Publication number
CN109391349B
CN109391349B CN201710672808.8A CN201710672808A CN109391349B CN 109391349 B CN109391349 B CN 109391349B CN 201710672808 A CN201710672808 A CN 201710672808A CN 109391349 B CN109391349 B CN 109391349B
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bits
crc
information
control information
field
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CN109391349A (en
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沈晓冬
潘学明
纪子超
孙鹏
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN201710672808.8A priority Critical patent/CN109391349B/en
Priority to US16/637,243 priority patent/US11563518B2/en
Priority to ES18843017T priority patent/ES2931080T3/en
Priority to PCT/CN2018/099382 priority patent/WO2019029566A1/en
Priority to EP18843017.7A priority patent/EP3667962B1/en
Publication of CN109391349A publication Critical patent/CN109391349A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information

Abstract

The embodiment of the invention provides a method and equipment for cyclic redundancy check, wherein the method comprises the following steps: determining a payload portion, the payload portion comprising at least one information field, the at least one information field for carrying information bits; determining a target Cyclic Redundancy Check (CRC) bit generation mode, wherein the target CRC bit generation mode is one of multiple CRC bit generation modes; generating CRC bits according to the load part and the target CRC bit generation mode; generating control information including the payload part and the CRC bits. The method of the embodiment of the invention can meet the individual requirements of different control information on the block error rate and the false alarm, and improve the receiving performance of the control information.

Description

Method and apparatus for cyclic redundancy check
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for cyclic redundancy check.
Background
Cyclic Redundancy Check (CRC) is the most common Check method in the field of data communication, and is essentially a data transmission error detection function, where a sending-end device performs polynomial calculation on data, attaches an obtained result to a frame to be transmitted, and a receiving-end device also performs similar polynomial calculation on data to ensure correctness and integrity of data transmission.
The current CRC check method cannot meet the individual requirements of different control information on Block Error Rate (BLER) and False Alarm (False Alarm), which affects the receiving performance of the control information.
Disclosure of Invention
The embodiment of the invention provides a method and equipment for cyclic redundancy check, which aim to solve the problem of poor control information receiving performance.
In a first aspect, a method for cyclic redundancy check is provided, which is applied to a sending end device, and the method includes:
determining a payload portion, the payload portion comprising at least one information field, the at least one information field for carrying information bits;
determining a target Cyclic Redundancy Check (CRC) bit generation mode, wherein the target CRC bit generation mode is one of multiple CRC bit generation modes;
generating CRC bits according to the load part and the target CRC bit generation mode;
generating control information including the payload part and the CRC bits.
In a second aspect, a method for cyclic redundancy check is provided, which is applied to a receiving end device, and the method includes:
receiving control information;
checking the control information according to the multiple CRC bit generation modes and the CRC bits;
the control information comprises a load part and Cyclic Redundancy Check (CRC) bits, the load part comprises at least one information field, the at least one information field is used for carrying information bits, the CRC bits are generated by the sending end equipment according to a target CRC bit generation mode and the load part, and the target CRC bit generation mode is one of multiple CRC bit generation modes.
In a third aspect, a sending end device is provided, which includes:
a first processing module configured to determine a payload portion, the payload portion including at least one information field, the at least one information field being used to carry information bits;
the first processing module is further configured to determine a target Cyclic Redundancy Check (CRC) bit generation manner, where the target CRC bit generation manner is one of multiple CRC bit generation manners;
a second processing module, configured to generate CRC bits according to the payload part and the target CRC bit generation manner;
the second processing module is further configured to generate control information including the payload portion and the CRC bits.
In a fourth aspect, a receiving end device is provided, which includes:
the receiving and sending module is used for receiving the control information;
a processing module, configured to check the control information according to the multiple CRC bit generation manners and the CRC bits;
the control information comprises a load part and Cyclic Redundancy Check (CRC) bits, the load part comprises at least one information field, the at least one information field is used for carrying information bits, the CRC bits are generated by the sending end equipment according to a target CRC bit generation mode and the load part, and the target CRC bit generation mode is one of multiple CRC bit generation modes.
In a fifth aspect, a sending end device is provided, which includes: a memory, a processor and a cyclic redundancy check program stored on the memory and executable on the processor, the cyclic redundancy check program when executed by the processor implementing the steps of the method of cyclic redundancy checking according to the first aspect.
In a sixth aspect, a receiving end device is provided, which includes: a memory, a processor and a cyclic redundancy check program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of cyclic redundancy checking according to the second aspect.
In a seventh aspect, a computer readable medium is provided, on which a cyclic redundancy check program is stored, which when executed by a processor implements the steps of the method of cyclic redundancy check according to the first aspect.
In an eighth aspect, a computer readable medium is provided, having stored thereon a cyclic redundancy check program, which when executed by a processor, performs the steps of the method of cyclic redundancy check according to the second aspect.
In a ninth aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the method of cyclic redundancy check of the first aspect. In particular, the computer program product may be run on the sending end device of the above third aspect.
In a tenth aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the method of cyclic redundancy check of the second aspect. In particular, the computer program product may be run on the receiving end device of the fourth aspect described above.
In the embodiment of the present invention, the sending end device determines a target CRC bit generation manner from among a plurality of CRC bit generation manners, generates CRC bits according to the determined load part and the target CRC bit generation manner, and generates control information including the load part and the CRC bits generated according to the target CRC bit generation manner. Therefore, in the method of the embodiment of the present invention, the sending end device may select different target CRC bit generation manners for different control information, meet the personalized requirements of the control information on Block Error Rate (BLER) and False Alarm (False Alarm), and improve the receiving performance of the control information.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram of a method of cyclic redundancy check in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of the positions of an information field, a pad field, and CRC bits in control information according to an embodiment of the present invention;
FIG. 3 is another schematic diagram of the positions of the information field, the pad field, and the CRC bits in the control information according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram of a method of cyclic redundancy check in accordance with one embodiment of the present invention;
FIG. 5 is a schematic flow chart diagram of a method of cyclic redundancy check in accordance with another specific embodiment of the present invention;
FIG. 6 is a schematic flow chart diagram of a method of cyclic redundancy check according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a transmitting-end device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a transmitting-end device according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a receiving-end device according to another embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS) or a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New Radio (NR) System.
In the embodiment of the present invention, the sending end device may be a network device, and correspondingly, the receiving end device is a terminal device. Or the sending end device may be a terminal device, and correspondingly, the receiving end device is a network device.
In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.
In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, referred to as an Evolved node B (eNB or eNodeB), in a third Generation (3rd Generation, 3G) network, referred to as a node B (node B), and so on.
Fig. 1 shows a method 100 of cyclic redundancy check according to an embodiment of the present invention, where the method 100 is performed by a transmitting end device. As shown in fig. 1, the method 100 includes:
s110, determining a load part, wherein the load part comprises at least one information field, and the at least one information field is used for carrying information bits.
Optionally, there are multiple formats of control information in a New Radio (NR) system, and the sizes (Size) of the control information in different formats may be different, which may result in higher complexity of a receiving device if the receiving device is required to blindly detect the formats of the control information. Therefore, in the embodiment of the present invention, control information in different formats is aligned by adding Padding Bits (Padding Bits) to the tail of some shorter control information, so as to reduce the complexity of the receiving device, wherein the Padding Bits are usually "0".
Specifically, in some embodiments, the sending end device determines whether Padding Bits exist according to the format of the control information to be generated, and if it is determined that Padding Bits exist, the payload portion further includes a Padding field, and the Padding field is used for carrying the Padding Bits.
And S120, determining a target Cyclic Redundancy Check (CRC) bit generation mode, wherein the target CRC bit generation mode is one of multiple CRC bit generation modes.
It should be noted that, in the embodiment of the present invention, Cyclic Redundancy Check (CRC) Bits may also be referred to as "CRC codes", and a difference between different CRC bit generation manners is a difference between Input Bits (Input Bits) in a process of generating CRC Bits.
Optionally, as an example, the plurality of CRC bit generation manners include at least two of the following manners: using information bits carried in all the at least one information field as input bits of a process of generating the CRC bits; using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits; all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
Optionally, for a CRC bit generation manner in which information bits carried in a part of information fields in at least one information field are used as input bits in a process of generating CRC bits, the sending end device and the receiving end device may agree in advance which information bits carried in which information fields in the control information are used as input bits in the process of generating CRC bits, or the sending end device may inform the receiving end device through the configuration information that information bits carried in which fields need to be used as input bits in the process of generating CRC bits.
Taking Uplink Control Information (UCI) as an example, assuming that the UCI includes a field carrying Acknowledgement (ACK)/Negative Acknowledgement (NACK) Information, a field carrying Scheduling Request (SR), and a field carrying Channel state indication Information (CSI), the sending end device and the receiving end device may agree in advance to use Information bits carried in the field carrying ACK/NACK and the field carrying SR as input bits of a process of generating CRC bits. Or the sending end device may instruct the receiving end device to use information bits carried in the fields carrying ACK/NACK and the fields carrying SR as input bits of the process of generating CRC bits through the configuration information.
It can be understood that, by using information bits carried by all information fields in at least one information field as input bits of the process of generating CRC bits, or using information bits carried by a part of information fields in at least one information field as input bits of the process of generating CRC bits, compared with the prior art in which all bits carried by the whole payload part are used as input bits of the process of generating CRC bits, it is possible to avoid a situation that when there is no error in the transmission of information bits in the control information and padding bits are transmitted in error, the receiving end device considers that the transmission of control information is in error, and improve the link performance of the communication system.
In the embodiment of the present invention, optionally, the sending end device determines a target CRC bit generation manner according to a format of the control information; and/or the sending end equipment determines a target CRC bit generation mode according to the type of the wireless network temporary identifier used for scrambling the control information.
S130, generating CRC bits according to the load part and the target CRC bit generation mode.
Specifically, in S130, the sending-end device determines, according to a target CRC bit generation manner, bits that are input bits in a process of generating CRC bits among all bits carried in the payload portion, and generates CRC bits according to the determined bits that are input bits.
S140, generating control information including the payload part and the CRC bits.
Optionally, in S110, the payload part further includes a padding field, and the positions of the CRC bits and the payload part in the control information are as shown in fig. 2 or fig. 3. In fig. 2, the location of the padding field is between the location of the at least one information field and the location of the CRC bits. In fig. 3, the positions of the CRC bits are between the positions of the at least one information field and the positions of the pad field. In the embodiment of the present invention, the positions of the CRC bits and the payload part in the control information may be specified by a protocol, may be agreed in advance by the sending end device and the receiving end device, and may also be notified to the receiving end device by the sending end device through the configuration information.
Optionally, as an example, one information field of at least one information field included in the payload portion in the control information is used to indicate a format of the control information, and the receiving end device parses the control information according to the format of the control information indicated by the information field, that is, may obtain all bits carried by the payload portion.
For example, an information field indicating the format of the control information takes different values to indicate different formats. For example, assuming that there are 4 formats of control information in the communication system, which are format AA, format BB, format CC, and format DD in sequence, and the information field for indicating the format of the control information includes 2 bits, the format of the control information may be indicated by "00" as "format AA", "01" as "format BB", the format of the control information may be indicated by "10" as "format CC", and the format of the control information may be indicated by "11" as "format DD".
Further, the length of Payload and the length of CRC Bits may be obtained by pre-configuration or pre-agreement, in order to facilitate the receiving end device to obtain the total length of the at least one Information field, a protocol may specify or the sending end device may configure a corresponding relationship between a format of the control Information and the total length of the at least one Information field included in the control Information, and the receiving end device may determine, according to the format of the received control Information and the corresponding relationship, the total length of the at least one Information field included in the received control Information, and further obtain Information Bits carried in all the Information fields in the at least one Information field.
Optionally, as another example, an information bit carried in one information field of the at least one information field is a predetermined bit (or a fixed bit), and the receiving end device may determine whether the control information is valid according to a transmission condition of the predetermined bit, so as to determine whether transmission of the control information is a false alarm, which can meet a requirement of the control information for the false alarm. In this case, if the receiving end device successfully verifies the control information, the receiving end device further determines the transmission condition of the predetermined bit, and if the predetermined bit is determined to be transmitted correctly, the control information is determined to be valid, and the transmission of the control information is not a false alarm (false alarm); if it is determined that the predetermined bit is transmitted in error, it is determined that the control information is invalid and the transmission of the control information is a false alarm.
The method of cyclic redundancy check according to an embodiment of the present invention will be described below with reference to specific examples. Fig. 4 is a method for cyclic redundancy check according to an embodiment of the present invention, and as shown in fig. 4, the method 200 includes:
s210, the sending end device determines a format of control information to be sent.
Optionally, as an example, the control information is Downlink Control Information (DCI), and a format of the control information is one of the following formats: "0", "1A", "1B", "1C", "1D", "2A", "2B", "3A".
S220, the sending end device determines that there are Padding Bits, and supplements the Padding Bits to the information Bits to be sent to form Payload.
And S230, the sending end equipment determines a target CRC bit generation mode according to the format of the control information and generates CRC bits according to the target CRC bit generation mode.
Optionally, the target CRC bit generation manner is one of the multiple CRC bit generation manners described in the method 100.
Optionally, the sending end device selects different target CRC bit generation manners for control information with different formats and the payload part length is the same. Taking DCI as an example, in order to reduce the complexity of blind detection of the receiving end device, the payload portions of the DCI with format "1A" and the DCI with format "0" may be the same in size, but different in content. The DCI with format "1A" is not sensitive to False Alarm for downlink data scheduling, and the DCI with format "0" is sensitive to False Alarm for uplink data scheduling. Therefore, when the format of the DCI is "1A", the target CRC bits determined by the sending end device are generated in a manner that information bits carried by all information fields in at least one information field are used as input bits of a process of generating CRC bits, or information bits carried by part of information fields in at least one information field are used as input bits of a process of generating CRC bits. When the format of the DCI is "0", the sending end device determines that the target CRC bits are generated in a manner that all bits carried in the payload portion are used as input bits in a process of generating the CRC bits.
S240, attaching CRC bits to the payload part constitutes control information.
Alternatively, Information Bits is carried in at least one Information field and Padding Bits is carried in a Padding field in the control Information generated in S240, and the positions of the at least one Information field, the Padding field, and the CRC Bits in the control Information are as shown in fig. 2 and 3.
S250, the sending end device sends control information to the receiving end device.
Optionally, in S250, if the Control information is DCI, the sending end device is a network device, the receiving end device is a terminal device, and the network device sends the DCI to the terminal device on a Physical Downlink Control Channel (PDCCH). If the Control information is UCI, the sending end is set as a terminal device, the receiving end device is a network device, and the terminal device sends UCI to the network device on a Physical Downlink Control Channel (PDCCH).
S260, the receiving end device determines multiple candidate formats of the control information.
Specifically, in S260, the receiving end device determines multiple candidate formats of the control information according to the specification of the protocol, or the receiving end device determines multiple candidate formats of the control information according to the configuration information of the transmitting end device.
S270, the receiving end equipment determines a plurality of CRC bit generation modes according to the plurality of candidate formats of the control information.
Optionally, each candidate format of the control information corresponds to one CRC bit generation manner, or several candidate formats correspond to the same CRC bit generation manner, and a correspondence between the candidate formats and the CRC bit generation manners may be specified by a protocol, or may be configured by the sending end device through configuration information.
S280, the receiving end equipment checks the control information according to the CRC bit generation modes and the CRC bit in the control information.
Optionally, in S280, the receiving end device calculates CRC bits according to each of the multiple CRC bit generation manners, compares the multiple calculated CRC bits with CRC bits in the control information, and if there are CRC bits in the multiple calculated CRC bits that are the same as the CRC bits in the control information, the control information is successfully checked, otherwise, the control information is failed to be checked.
And S290, the receiving end equipment judges whether the control information is transmitted correctly according to the check result.
Specifically, if the control information verification is successful in S280, the control information transmission is considered to be correct in S290. If the control information check fails in S280, the control information transmission is considered to be erroneous in S290.
Fig. 5 is a method for cyclic redundancy check according to another embodiment of the present invention, and as shown in fig. 5, the method 300 includes:
s310, the sending end device determines a Radio Network Temporary Identity RNTI (RNTI) for scrambling control information to be sent.
Optionally, in S310, the control information is DCI, and the RNTI is one of the following RNTIs: SI-RNTI, P-RNTI, RA-RNTI, C-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI and SPS S-RNTI.
S320, the sending end device determines that there are Padding Bits, and the sending end device supplements the Padding Bits to the information Bits to be sent to form Payload.
S330, the sending terminal equipment determines a target CRC bit generation mode according to the RNTI used for scrambling the control information to be sent, and generates CRC bits according to the target CRC bit generation mode.
Optionally, the target CRC bit generation manner is one of the multiple CRC bit generation manners described in the method 100.
Optionally, the sending end device selects different target CRC bit generation manners for the control information scrambled by different RNTIs with the same length of the payload part. Taking DCI as an example, in order to reduce the complexity of blind detection of a receiving end device, the size of the payload part of DCI scrambled by a Semi-Persistent Scheduling-RNTI (SPS-RNTI) and DCI scrambled by a C-RNTI may be the same, but the content is different. Therefore, the sending terminal equipment can select different target CRC bit generation modes for the DCI scrambled by the SPS-RNTI and the C-RNTI.
Further, Information Bits in the DCI scrambled by the SPS-RNTI include a predetermined bit, and when the receiving end device determines whether the control Information is valid, it needs to determine whether the control Information is valid according to a check result and a transmission condition of the predetermined bit.
S340, attaching CRC bits to the payload part constitutes control information.
S350, the sending end device sends control information to the receiving end device.
S360, the receiving terminal equipment determines various candidate RNTIs of the control information.
Specifically, in S360, the receiving end device determines multiple candidate RNTIs of the control information according to the specification of the protocol, or the receiving end device determines multiple candidate RNTIs of the control information according to the configuration information of the transmitting end device.
S370, the receiving terminal equipment determines a plurality of CRC bit generation modes according to the plurality of candidate RNTIs of the control information.
Optionally, each candidate RNTI of the control information corresponds to one CRC bit generation manner, or several candidate RNTIs correspond to the same CRC bit generation manner, and a correspondence between the candidate RNTIs and the CRC bit generation manners may be specified by a protocol, or may be configured by the sending end device through configuration information.
And S380, the receiving terminal equipment checks the control information according to the CRC bit generation modes and the CRC bits in the control information.
Optionally, in S380, the receiving end device calculates CRC bits according to each CRC bit generation manner of the multiple CRC bit generation manners, compares the multiple calculated CRC bits with CRC bits in the control information, if CRC bits identical to the CRC bits in the control information exist in the multiple calculated CRC bits, it is considered that the control information is successfully checked, and the RNTI corresponding to the CRC bit generation manner corresponding to the CRC bits identical to the CRC bits in the control information is the RNTI for scrambling the control information. If the CRC bits identical to the CRCF bits in the control information do not exist in the calculated multiple CRC bits, the control information check is considered to be failed.
And S390, the receiving end equipment judges whether the control information is transmitted correctly according to the check result.
Specifically, if the control information check is successful in S380, the control information transmission is considered to be correct in S390. If the control information check fails in S380, the control information transmission is considered to be erroneous in S390.
In this embodiment of the present invention, optionally, in S230 in the method 200 and S330 in the method 300, the sending end device may determine a target CRC bit generation manner from among multiple CRC bit generation manners according to a format of control information to be sent and an RNTI used for scrambling the control information, and produce CRC bits according to the target CRC bit generation manner. Correspondingly, in S270 in the method 200 and S370 in the method 300, the receiving end device determines multiple CRC bit generation manners according to multiple candidate formats of the control information and multiple RNTIs used for scrambling the control information, and checks the control information according to the determined multiple CRC bit generation manners and CRC bits in the control information.
Fig. 6 illustrates a method 400 of cyclic redundancy checking according to another embodiment of the present invention, which method 400 may be performed by a receiving end device. It is to be understood that the interaction between the sending end device and the receiving end device described from the receiving end device side is the same as that described at the sending end device side, and the related description is appropriately omitted to avoid redundancy. As shown in fig. 6, the method 400 includes:
s410, receiving control information;
s420, checking the control information according to the multiple CRC bit generation modes and the CRC bits;
the control information comprises a load part and Cyclic Redundancy Check (CRC) bits, the load part comprises at least one information field, the at least one information field is used for carrying information bits, the CRC bits are generated by the sending end equipment according to a target CRC bit generation mode and the load part, and the target CRC bit generation mode is one of multiple CRC bit generation modes.
Optionally, as an example, in S420, the receiving end device generates multiple kinds of CRC bits according to multiple kinds of CRC bit generation manners, compares the generated multiple kinds of CRC bits with CRC bits in the control information, and determines whether the control information is correctly transmitted according to a comparison result.
According to the cyclic redundancy check method provided by the embodiment of the invention, the CRC bits in the control information received by the receiving end equipment are generated by the sending end equipment according to the target CRC bit generation mode in the multiple CRC bit generation modes, and the receiving end equipment checks the control information according to the multiple CRC bit generation modes and the CRC bits in the control information, so that the receiving performance of the control information can be improved.
In this embodiment of the present invention, optionally, the multiple CRC bit generation manners include at least two of the following CRC code generation manners: using information bits carried in all the at least one information field as input bits of the process of generating the CRC bits; using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits; all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
In the embodiment of the present invention, optionally, the receiving end device determines the multiple CRC bit generation manners according to multiple candidate formats of the control information; and/or determining the multiple CRC bit generation modes according to multiple candidate radio network temporary identifiers RNTIs used for scrambling the control information.
In this embodiment of the present invention, optionally, information bits carried in a first information field of the at least one information field are predetermined bits, where the predetermined bits are used for a receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bits, and if the receiving end device succeeds in checking the control information according to the multiple CRC bit generation manners and the CRC bits, the receiving end device determines whether the control information is valid according to the transmission condition of the predetermined bits; if the transmission of the predetermined bit is correct, determining that the control information is valid; and if the predetermined bit is in error transmission, determining that the control information is invalid.
In this embodiment of the present invention, optionally, a second information field of the at least one information field is used to indicate a format of the control information; and the receiving terminal equipment acquires all bits carried by the load part according to the format of the control information, and then checks the control information according to the multiple CRC bit generation modes, part or all bits in all bits carried by the load part and the CRC bits.
In this embodiment of the present invention, optionally, the payload portion further includes a padding field, and the padding field is used to carry padding bits.
In this embodiment of the present invention, optionally, the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bit; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
In the embodiment of the present invention, the method for cyclic redundancy check according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 6, and the sending end device according to the embodiment of the present invention will be described in detail below with reference to fig. 7.
Fig. 7 is a schematic structural diagram of a transmitting-end device according to an embodiment of the present invention. As shown in fig. 7, the transmitting-end device 10 includes:
a first processing module 11, configured to determine a payload portion, where the payload portion includes at least one information field, and the at least one information field is used for carrying information bits;
the first processing module 11 is further configured to determine a target CRC bit generation manner, where the target CRC bit generation manner is one of multiple CRC bit generation manners;
a second processing module 12, configured to generate CRC bits according to the payload part and the target CRC bit generation manner;
the second processing module 12 is further configured to generate control information including the payload portion and the CRC bits.
The sending end device according to the embodiment of the present invention determines a target CRC bit generation manner from a plurality of CRC bit generation manners, generates CRC bits according to the determined load part and the target CRC bit generation manner, and generates control information including the load part and the CRC bits generated according to the target CRC bit generation manner. The sending end equipment can select different target CRC bit generation modes for different control information, meet the requirements of the control information on block error rate and false alarm, and improve the receiving performance of the control information.
Optionally, as an embodiment, the multiple CRC bit generation manners include at least two of the following manners: using information bits carried in all the at least one information field as input bits of a process of generating the CRC bits; using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits; all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
Optionally, as an embodiment, the first processing module 11 is specifically configured to: determining a generation mode of the target CRC bit according to the format of the control information; and/or determining the generation mode of the target CRC bit according to the type of the radio network temporary identifier RNTI used for scrambling the control information.
Optionally, as an embodiment, an information bit carried in a first information field of the at least one information field is a predetermined bit, and the predetermined bit is used by the receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit.
Optionally, as an embodiment, a second information field of the at least one information field is used to indicate a format of the control information.
Optionally, as an embodiment, the payload portion further includes a padding field, and the padding field is used for carrying padding bits.
Optionally, as an embodiment, the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bit; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
The sending end device according to the embodiment of the present invention may refer to the flows of the methods 100 to 300 corresponding to the embodiments of the present invention, and each unit/module and the other operations and/or functions in the sending end device are respectively for implementing the corresponding flows in the methods 100 to 300, and are not described herein again for brevity.
Fig. 8 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention. As shown in fig. 8, the receiving-end apparatus 20 includes:
a transceiver module 21 for receiving control information;
a processing module 22, configured to check the control information according to the multiple CRC bit generation manners and the CRC bits;
the control information comprises a load part and Cyclic Redundancy Check (CRC) bits, the load part comprises at least one information field, the at least one information field is used for carrying information bits, the CRC bits are generated by the sending end equipment according to a target CRC bit generation mode and the load part, and the target CRC bit generation mode is one of multiple CRC bit generation modes.
According to the embodiment of the invention, the CRC bits in the control information received by the receiving end equipment are generated by the sending end equipment according to the target CRC bit generation mode in the multiple CRC bit generation modes, and the receiving end equipment checks the control information according to the multiple CRC bit generation modes and the CRC bits in the control information, so that the receiving performance of the control information can be improved.
Optionally, as an embodiment, the multiple CRC bit generation manners include at least two of the following CRC code generation manners: using information bits carried in all the at least one information field as input bits of the process of generating the CRC bits; using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits; all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
Optionally, as an embodiment, the processing module 22 is further configured to: determining the multiple CRC bit generation modes according to multiple candidate formats of the control information; and/or determining the multiple CRC bit generation modes according to multiple candidate radio network temporary identifiers RNTIs used for scrambling the control information.
Optionally, as an embodiment, an information bit carried in a first information field of the at least one information field is a predetermined bit, where the predetermined bit is used by a receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit, and the processing module 22 is further configured to:
if the control information is successfully checked according to the multiple CRC bit generation modes and the CRC bits, judging whether the control information is valid according to the transmission condition of the preset bits;
if the transmission of the predetermined bit is correct, determining that the control information is valid;
and if the predetermined bit is in error transmission, determining that the control information is invalid.
Optionally, as an embodiment, a second information field of the at least one information field is used to indicate a format of the control information;
wherein the processing module 22 is specifically configured to:
acquiring all bits carried by the load part according to the format of the control information;
and checking the control information according to the plurality of CRC bit generation modes, part or all bits in all bits carried by the load part and the CRC bits.
Optionally, as an embodiment, the payload portion further includes a padding field, and the padding field is used for carrying padding bits.
Optionally, as an embodiment, the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bit; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
The receiving end device according to the embodiment of the present invention may refer to the flows corresponding to the methods 200 to 400 in the embodiments of the present invention, and each unit/module and the other operations and/or functions in the receiving end device are respectively for implementing the corresponding flows in the methods 200 to 400, and are not described herein again for brevity.
Fig. 9 is a schematic structural diagram of a transmitting end device according to another embodiment of the present invention, which can implement details of the cyclic redundancy check methods in the methods 100 to 300, and can achieve the same effects. As shown in fig. 9, the transmitting device 100 includes a processor 110, a transceiver 120, a memory 130, and a bus interface. Wherein:
in this embodiment of the present invention, the sending-end device 100 further includes: a computer program stored on the memory 130 and executable on the processor 110, the computer program when executed by the processor 110 performing the steps of:
determining a payload portion, the payload portion comprising at least one information field, the at least one information field for carrying information bits;
determining a target Cyclic Redundancy Check (CRC) bit generation mode, wherein the target CRC bit generation mode is one of multiple CRC bit generation modes;
generating CRC bits according to the load part and the target CRC bit generation mode;
generating control information including the payload part and the CRC bits.
In FIG. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors, represented in particular by processor 110, and memory, represented by memory 130, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 120 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 110 is responsible for managing the bus architecture and general processing, and the memory 130 may store data used by the processor 110 in performing operations.
Optionally, the computer program when executed by the processor 110 may further implement the steps of:
determining a generation mode of the target CRC bit according to the format of the control information; and/or the presence of a gas in the gas,
and determining the generation mode of the target CRC bit according to the type of the radio network temporary identifier RNTI used for scrambling the control information.
Optionally, as an embodiment, the multiple CRC bit generation manners include at least two of the following manners:
using information bits carried in all the at least one information field as input bits of a process of generating the CRC bits;
using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits;
all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
Optionally, as an embodiment, an information bit carried in a first information field of the at least one information field is a predetermined bit, and the predetermined bit is used by the receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit.
Optionally, as an embodiment, a second information field of the at least one information field is used to indicate a format of the control information.
Optionally, as an embodiment, the payload portion further includes a padding field, and the padding field is used for carrying padding bits.
Optionally, as an embodiment, the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bit; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
The sending end device according to the embodiment of the present invention determines a target CRC bit generation manner from a plurality of CRC bit generation manners, generates CRC bits according to the determined load part and the target CRC bit generation manner, and generates control information including the load part and the CRC bits generated according to the target CRC bit generation manner. The sending end equipment can select different target CRC bit generation modes for different control information, meet the requirements of the control information on block error rate and false alarm, and improve the receiving performance of the control information.
The sending-end device 100 according to the embodiment of the present invention may refer to the sending-end device 10 corresponding to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the sending-end device are respectively for implementing corresponding flows in the methods 100 to 300, and are not described herein again for brevity.
Fig. 10 is a schematic structural diagram of a receiving-end apparatus according to another embodiment of the present invention, and as shown in fig. 10, the receiving-end apparatus 200 includes: at least one processor 210, memory 220, at least one network interface 230, and a user interface 240. The various components in the receiving end device 200 are coupled together by a bus system 250. It will be appreciated that the bus system 250 is used to enable communications among the components. The bus system 250 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 250 in fig. 10.
The user interface 240 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.
It will be appreciated that memory 220 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration, and not limitation, many forms of RAM are available, such as static random access memory (statram, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr Data random SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 220 of the subject systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 220 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 221 and application programs 222.
The operating system 221 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 222 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program implementing a method according to an embodiment of the invention may be included in the application 222.
In this embodiment of the present invention, the receiving end device 200 further includes: a computer program stored on the memory 220 and executable on the processor 210, the computer program when executed by the processor 210 implementing the steps of:
receiving control information;
checking the control information according to the multiple CRC bit generation modes and the CRC bits;
the control information comprises a load part and Cyclic Redundancy Check (CRC) bits, the load part comprises at least one information field, the at least one information field is used for carrying information bits, the CRC bits are generated by the sending end equipment according to a target CRC bit generation mode and the load part, and the target CRC bit generation mode is one of multiple CRC bit generation modes.
The method disclosed in the above embodiments of the present invention may be applied to the processor 210, or implemented by the processor 210. The processor 210 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 210. The Processor 210 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 220, and the processor 210 reads the information in the memory 220 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer-readable storage medium has stored thereon a computer program which, when executed by the processor 210, implements the steps of the method embodiments as described above in the methods 200 to 400.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Optionally, the computer program when executed by the processor 210 may further implement the steps of:
determining the multiple CRC bit generation modes according to multiple candidate formats of the control information; and/or the presence of a gas in the gas,
and determining the multiple CRC bit generation modes according to multiple candidate radio network temporary identifiers RNTIs for scrambling the control information.
Optionally, as an embodiment, the multiple CRC bit generation manners include at least two of the following CRC code generation manners: using information bits carried in all the at least one information field as input bits of the process of generating the CRC bits; using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits; all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
Optionally, as an embodiment, an information bit carried in a first information field of the at least one information field is a predetermined bit, where the predetermined bit is used for a receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit, and when being executed by the processor 210, the computer program may further implement the following steps:
if the control information is successfully checked according to the multiple CRC bit generation modes and the CRC bits, judging whether the control information is valid according to the transmission condition of the preset bits;
if the transmission of the predetermined bit is correct, determining that the control information is valid;
and if the predetermined bit is in error transmission, determining that the control information is invalid.
Optionally, as an embodiment, a second information field of the at least one information field is used to indicate a format of the control information;
wherein the computer program when executed by the processor 210 further realizes the steps of:
acquiring all bits carried by the load part according to the format of the control information;
and checking the control information according to the plurality of CRC bit generation modes, part or all bits in all bits carried by the load part and the CRC bits.
Optionally, as an embodiment, the payload portion further includes a padding field, and the padding field is used for carrying padding bits.
Optionally, as an embodiment, the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bit; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field. According to the embodiment of the invention, the CRC bits in the control information received by the receiving end equipment are generated by the sending end equipment according to the target CRC bit generation mode in the multiple CRC bit generation modes, and the receiving end equipment checks the control information according to the multiple CRC bit generation modes and the CRC bits in the control information, so that the receiving performance of the control information can be improved.
The receiving end device 200 according to the embodiment of the present invention may refer to the receiving end device 20 corresponding to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the receiving end device are respectively for implementing corresponding flows in the methods 200 to 400, and are not described herein again for brevity.
The embodiment of the present invention further provides a computer program product including instructions, and when a computer runs the instructions of the computer program product, the computer executes the method for cyclic redundancy check of the above method embodiment. In particular, the computer program product may be run on the sending end device and the receiving end device.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (24)

1. A method for cyclic redundancy check is applied to a sending terminal device, and is characterized in that the method comprises the following steps:
determining a payload portion, the payload portion comprising a pad field and at least one information field, the pad field being used to carry pad bits and the at least one information field being used to carry information bits;
determining a target Cyclic Redundancy Check (CRC) bit generation mode, wherein the target CRC bit generation mode is one of multiple CRC bit generation modes;
generating CRC bits according to the load part and the target CRC bit generation mode;
generating control information including the payload part and the CRC bits;
wherein the plurality of CRC bit generation modes include at least two of the following modes:
using information bits carried in all the at least one information field as input bits of a process of generating the CRC bits;
using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits;
all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
2. The method of claim 1, wherein determining the target CRC code generation comprises:
determining a generation mode of the target CRC bit according to the format of the control information; and/or the presence of a gas in the gas,
and determining the generation mode of the target CRC bit according to the type of the radio network temporary identifier RNTI used for scrambling the control information.
3. The method according to claim 1 or 2, wherein the information bit carried in the first information field of the at least one information field is a predetermined bit, and the predetermined bit is used for a receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit.
4. The method of claim 1, wherein a second information field of the at least one information field is used to indicate a format of the control information.
5. The method of claim 1, wherein the padding field is located in the control information between the location of the at least one information field and the location of the CRC bits; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
6. A cyclic redundancy check method is applied to receiving-end equipment, and is characterized by comprising the following steps:
receiving control information;
checking the control information according to a plurality of Cyclic Redundancy Check (CRC) bit generation modes and CRC bits;
the control information comprises a payload part and the CRC bits, the payload part comprises a padding field and at least one information field, the padding field is used for carrying padding bits, the at least one information field is used for carrying information bits, the CRC bits are generated by sending end equipment according to a target CRC bit generation mode and the payload part, and the target CRC bit generation mode is one of multiple CRC bit generation modes;
wherein the plurality of CRC bit generation modes include at least two of the following CRC code generation modes:
using information bits carried in all the at least one information field as input bits of the process of generating the CRC bits;
using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits;
all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
7. The method of claim 6, further comprising:
determining the multiple CRC bit generation modes according to multiple candidate formats of the control information; and/or the presence of a gas in the gas,
and determining the multiple CRC bit generation modes according to multiple candidate radio network temporary identifiers RNTIs for scrambling the control information.
8. The method according to claim 6, wherein the information bit carried in the first information field of the at least one information field is a predetermined bit, and the predetermined bit is used for a receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit, and the method further comprises:
if the control information is successfully checked according to the multiple CRC bit generation modes and the CRC bits, judging whether the control information is valid according to the transmission condition of the preset bits;
if the transmission of the predetermined bit is correct, determining that the control information is valid;
and if the predetermined bit is in error transmission, determining that the control information is invalid.
9. The method of claim 6, wherein a second information field of the at least one information field is used to indicate a format of the control information;
wherein the checking the control information according to the plurality of CRC bit generation manners and the CRC bits includes:
acquiring all bits carried by the load part according to the format of the control information;
and checking the control information according to the plurality of CRC bit generation modes, part or all bits in all bits carried by the load part and the CRC bits.
10. The method of claim 6, wherein the padding field is located in the control information between the location of the at least one information field and the location of the CRC bits; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
11. A transmitting-end device, comprising:
a first processing module, configured to determine a payload portion, where the payload portion includes a pad field and at least one information field, where the pad field is used to carry pad bits, and the at least one information field is used to carry information bits;
the first processing module is further configured to determine a target Cyclic Redundancy Check (CRC) bit generation manner, where the target CRC bit generation manner is one of multiple CRC bit generation manners;
a second processing module, configured to generate CRC bits according to the payload part and the target CRC bit generation manner;
the second processing module is further configured to generate control information including the payload portion and the CRC bits;
wherein the plurality of CRC bit generation modes include at least two of the following modes:
using information bits carried in all the at least one information field as input bits of a process of generating the CRC bits;
using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits;
all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
12. The sender device of claim 11, wherein the first processing module is specifically configured to:
determining a generation mode of the target CRC bit according to the format of the control information; and/or the presence of a gas in the gas,
and determining the generation mode of the target CRC bit according to the type of the radio network temporary identifier RNTI used for scrambling the control information.
13. The sending-end device of claim 11, wherein an information bit carried in a first information field of the at least one information field is a predetermined bit, and the predetermined bit is used for a receiving-end device to determine whether the control information is valid according to a transmission condition of the predetermined bit.
14. The sender apparatus of claim 11, wherein a second information field of the at least one information field is used to indicate a format of the control information.
15. The sender device of claim 11, wherein the position of the padding field in the control information is between the position of the at least one information field and the position of the CRC bits; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
16. A receiving-end device, comprising:
the receiving and sending module is used for receiving the control information;
the processing module is used for checking the control information according to a plurality of Cyclic Redundancy Check (CRC) bit generation modes and CRC bits;
the control information comprises a payload part and the CRC bits, the payload part comprises a padding field and at least one information field, the padding field is used for carrying padding bits, the at least one information field is used for carrying information bits, the CRC bits are generated by sending end equipment according to a target CRC bit generation mode and the payload part, and the target CRC bit generation mode is one of multiple CRC bit generation modes;
wherein the plurality of CRC bit generation modes include at least two of the following CRC code generation modes:
using information bits carried in all the at least one information field as input bits of the process of generating the CRC bits;
using information bits carried in a part of information fields in the at least one information field as input bits of the process of generating the CRC bits;
all bits carried in the payload portion are taken as input bits for the process of generating the CRC bits.
17. The receiving-end device of claim 16, wherein the processing module is further configured to:
determining the multiple CRC bit generation modes according to multiple candidate formats of the control information; and/or the presence of a gas in the gas,
and determining the multiple CRC bit generation modes according to multiple candidate radio network temporary identifiers RNTIs for scrambling the control information.
18. The receiving end device of claim 16, wherein an information bit carried in a first information field of the at least one information field is a predetermined bit, and the predetermined bit is used for the receiving end device to determine whether the control information is valid according to a transmission condition of the predetermined bit, and the processing module is further configured to:
if the control information is successfully checked according to the multiple CRC bit generation modes and the CRC bits, judging whether the control information is valid according to the transmission condition of the preset bits;
if the transmission of the predetermined bit is correct, determining that the control information is valid;
and if the predetermined bit is in error transmission, determining that the control information is invalid.
19. The receiver apparatus according to claim 16, wherein a second information field of the at least one information field is used to indicate a format of the control information;
wherein the processing module is specifically configured to:
acquiring all bits carried by the load part according to the format of the control information;
and checking the control information according to the plurality of CRC bit generation modes, part or all bits in all bits carried by the load part and the CRC bits.
20. The receiving-end device of claim 16, wherein the padding field is located in the control information between the location of the at least one information field and the location of the CRC bits; or, the position of the CRC bits in the control information is between the position of the at least one information field and the position of the padding field.
21. A transmitting-end device, comprising: memory, processor and cyclic redundancy check program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of cyclic redundancy check according to any of claims 1 to 5.
22. A receiving-end device, comprising: memory, processor and cyclic redundancy check program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of cyclic redundancy check according to any of claims 6 to 10.
23. A computer-readable medium, in which a cyclic redundancy check program is stored which, when executed by a processor, implements the steps of the method of cyclic redundancy check according to any one of claims 1 to 5.
24. A computer-readable medium, in which a cyclic redundancy check program is stored which, when executed by a processor, carries out the steps of the method of cyclic redundancy check according to any one of claims 6 to 10.
CN201710672808.8A 2017-08-08 2017-08-08 Method and apparatus for cyclic redundancy check Active CN109391349B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201710672808.8A CN109391349B (en) 2017-08-08 2017-08-08 Method and apparatus for cyclic redundancy check
US16/637,243 US11563518B2 (en) 2017-08-08 2018-08-08 Method and device of cyclic redundancy check
ES18843017T ES2931080T3 (en) 2017-08-08 2018-08-08 Cyclic redundancy check method and device
PCT/CN2018/099382 WO2019029566A1 (en) 2017-08-08 2018-08-08 Method and device for cyclic redundancy check
EP18843017.7A EP3667962B1 (en) 2017-08-08 2018-08-08 Method and device for cyclic redundancy check

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710672808.8A CN109391349B (en) 2017-08-08 2017-08-08 Method and apparatus for cyclic redundancy check

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Publication Number Publication Date
CN109391349A CN109391349A (en) 2019-02-26
CN109391349B true CN109391349B (en) 2020-04-07

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