CN112636879B - Method and device for code block processing based on hybrid automatic repeat request - Google Patents
Method and device for code block processing based on hybrid automatic repeat request Download PDFInfo
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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Abstract
The embodiment of the application provides a method and a device for code block processing based on hybrid automatic repeat request, which relate to the technical field of communication, and the method comprises the following steps: acquiring the block error rate of the CB based on HARQ transmission, and processing the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB with decoding failure after the target CB into L under the condition that the block error rate meets a preset condition, wherein the target CB is the CB with decoding failure at present corresponding to the condition that the block error rate meets the preset condition, and the L is less than or equal to the number of soft information actually required by the CB for storage. Therefore, when the capacity of the HARQ Buffer is insufficient or the DDR bandwidth is insufficient, a part of soft information can be stored in CB meeting decoding failure in the HARQ cache as many as possible, and further the utilization efficiency of the HARQ cache is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for code block processing based on a hybrid automatic repeat request.
Background
In a communication system, a Transport Block (TB) may be divided into a plurality of Code Blocks (CBs), each of which may include a plurality of bits. The transmitting end transmits in the form of a plurality of code blocks, and the receiving end receives and processes the plurality of code blocks. When the decoding of the receiving end fails, the CB with the failed decoding may be stored in a hybrid automatic repeat request (HARQ) buffer or a Double Data Rate (DDR) memory, and a retransmission signal is requested from the transmitting end by using an HARQ method, and the receiving end combines the retransmitted signal with the previously received signal and then decodes the combined signal.
In general, in the process of storing CB with decoding failure, when the capacity of HARQ Buffer is insufficient or the DDR bandwidth is insufficient, all soft information of CB exceeding the storage capacity may be discarded. However, the above storage method makes the utilization efficiency of the HARQ buffer low.
Disclosure of Invention
The embodiment of the application provides a method and a device for code block processing based on a hybrid automatic repeat request, relates to the technical field of communication, and can solve the technical problem that in the prior art, when the capacity of a HARQ Buffer is insufficient or the DDR bandwidth is insufficient, all soft information of a CB exceeding the storage capacity needs to be abandoned, so that the utilization efficiency of a HARQ cache is low.
In a first aspect, an embodiment of the present application provides a method for CB processing based on HARQ, including: acquiring the block error rate of CB based on HARQ transmission; under the condition that the block error rate meets a preset condition, processing the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB with decoding failure behind the target CB into L; and the target CB is a CB which is corresponding to the current decoding failure when the block error rate meets the preset condition, and L is less than or equal to the number of soft information required by the actual storage of the CB.
In one possible embodiment, L satisfies:
L＝min(RealL，(T-CBNumThr*RealL)/(C-CBNumThr))
the T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; the C is the number of the CBs in the HARQ transmission, the RealL is the number of the soft information actually required by the CBs in the storage, and the CBNumThr is a preset CB number threshold value.
In a possible implementation manner, processing the number of soft information of the target CB in the HARQ transmission and the number of soft information of the CB whose decoding fails after the target CB to L, includes: under the condition that the number of the soft information of the target CB is larger than the L, selecting the first L soft information in the target CB; and/or selecting the first L pieces of soft information in the CB with the decoding failure after the target CB when the number of the soft information of the CB with the decoding failure after the target CB is larger than the L.
In a possible implementation manner, the obtaining the block error rate of the CBs based on HARQ transmission includes: acquiring the number of the CB in the HARQ transmission; and acquiring the block error rate under the condition that the number is greater than a first threshold value.
In a possible implementation, the block error rate satisfying the preset condition includes:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
the CBBLER is the block error rate, the CBBLERThr is a preset second threshold, the CBErrThr is a CBBLER threshold represented by a 4-bit width, the CBErrCnt represents the number of CBs in the middle error of the current decoding process, the CBIdx is the number of CBs, the N is a constant, and the CBBLERThr = CBErrThr/N.
In a possible embodiment, the method further comprises: and writing the CBs with the soft information number of L into an HARQ cache.
In one possible embodiment, the method further includes: acquiring soft information of the CB with failed decoding stored in the HARQ cache; and decoding according to the soft information of the CB with failed decoding stored in the HARQ cache.
In a second aspect, an embodiment of the present application provides an apparatus for HARQ-based CB processing, where the apparatus includes:
the acquisition module is used for acquiring the block error rate of the CB based on HARQ transmission;
a processing module, configured to, when the block error rate satisfies a preset condition, process both the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB that has failed to decode after the target CB to L; and the target CB is a CB which is corresponding to the current decoding failure when the block error rate meets the preset condition, and L is less than or equal to the number of soft information required by the actual storage of the CB.
In one possible embodiment, L satisfies:
L＝min(RealL，(T-CBNumThr*RealL)/(C-CBNumThr))
the T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; the C is the number of the CBs in the HARQ transmission, the RealL is the number of the soft information actually required by the CBs, and the CBNumThr is a preset CB number threshold value.
In a possible implementation, the processing module is specifically configured to:
under the condition that the number of the soft information of the target CB is larger than the L, selecting the first L soft information in the target CB; and/or selecting the first L pieces of soft information in the CB with the decoding failure after the target CB when the number of the soft information of the CB with the decoding failure after the target CB is larger than the L.
In a possible implementation manner, the obtaining module is specifically configured to:
acquiring the number of the CB in the HARQ transmission; and acquiring the block error rate under the condition that the number is greater than a first threshold value.
In a possible implementation, the block error rate satisfying the preset condition includes:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
the CBBLER is the block error rate, the CBBLERThr is a preset second threshold, the CBErrThr is a CBBLER threshold represented by a 4-bit width, the CBErrCnt represents the number of CBs in the middle error of the current decoding process, the CBIdx is the number of CBs, the N is a constant, and the CBBLERThr = CBErrThr/N.
In a possible implementation, the processing module is further configured to:
and writing the CBs with the soft information number of L into an HARQ cache.
In a possible implementation manner, the obtaining module is further configured to:
acquiring soft information of the CB with failed decoding stored in the HARQ cache; the processing module is further configured to decode according to the soft information of the CB with failed decoding stored in the HARQ buffer.
In a third aspect, an embodiment of the present application provides an electronic device, including: at least one processor and memory;
the memory stores computer execution instructions;
the at least one processor executing the memory stored computer-executable instructions causes the at least one processor to perform the method of HARQ based CB processing as provided in the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer executable instruction is stored, and when a processor executes the computer executable instruction, the method for HARQ-based CB processing as provided in the first aspect is implemented.
The embodiment of the application provides a CB processing method and device based on HARQ, the block error rate of a CB based on HARQ transmission is obtained, and when the block error rate meets a preset condition, the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB after the target CB and with decoding failure are both processed into L, wherein the target CB is the CB with decoding failure at present corresponding to the condition that the block error rate meets the preset condition, and L is smaller than or equal to the number of soft information actually required by the CB in storage. Therefore, when the capacity of the HARQ Buffer is insufficient or the DDR bandwidth is insufficient, a part of soft information can be stored in CBs which meet decoding failure as much as possible in the HARQ Buffer, and the utilization efficiency of the HARQ Buffer is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic architecture diagram of a communication system provided in the present application;
fig. 2 is a schematic flowchart of a decoding process performed by a receiving end according to an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a method for CB processing based on HARQ according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating processing of soft information according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating program modules of an apparatus for HARQ-based CB processing according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Specific embodiments of the present disclosure have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The embodiments of the present application can be applied to a wireless communication system, and it should be noted that the wireless communication system mentioned in the embodiments of the present application includes but is not limited to: 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 advanced long term evolution-a (LTE advanced) system, an LTE Frequency Division Duplex (FDD) system, an LTE time division duplex (time division duplex), TDD), universal Mobile Telecommunications System (UMTS), etc., a fifth generation mobile communication technology (5G) communication system, a New Radio (NR) communication system, and a future 6G communication system, a bluetooth system, a WiFI system, a satellite communication system, a device-to-device (D2D) communication system, a machine communication system, a car networking, even a higher-level communication system, etc.
The communication device related to the embodiment of the application mainly comprises network equipment or terminal equipment. For example, in this embodiment of the present application, a sending end may be a network device, and a receiving end is a terminal device. In this embodiment, the sending end is a terminal device, and the receiving end is a network device.
In the embodiment of the present application, the terminal device (terminal device) includes, but is not limited to, a Mobile Station (MS), a mobile terminal (mobile terminal), a mobile phone (mobile telephone), a handset (handset), a portable device (portable equipment), and the like, and the terminal device may communicate with one or more core networks via 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 like, and the terminal device may also be a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in an unmanned driving (self), a wireless terminal in a remote medical (remote medical) terminal, a wireless terminal in a smart grid (smart grid), a wireless terminal in a home security (security) terminal in a city, a transport (security) terminal, and the like. Terminals can be called different names in different networks, for example: user equipment, mobile station, subscriber unit, station, cellular telephone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless telephone, wireless local loop station, and the like. For convenience of description, the terminal device is simply referred to in the application.
In this embodiment, the network device may be a device for communicating with the terminal device, for example, the network device may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a base station (nodeB, NB) in a WCDMA system, an evolved node B (eNB or eNodeB) in an LTE system, a transmission point (transmission reception point) or a next generation node B (trpb, gbb) in a New Radio (NR) network, or the network device may be a satellite, a relay station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a 5G network, a network device in a base station or a Public Land Mobile Network (PLMN) in the future, or a network device in a network with multiple other converged technologies. It should be noted that, when the scheme of the embodiment of the present application is applied to other systems that may appear in the future, names of the base station and the terminal may change, but this does not affect implementation of the scheme of the embodiment of the present application.
The embodiment of the present invention relates to a channel coding and decoding technology for improving information transmission reliability and ensuring communication quality in a communication scenario, and may be applied to a scenario in which information is encoded and decoded, for example, a scenario in which enhanced mobile broadband (eMBB) uplink control information and downlink control information are encoded and decoded, and may also be applied to other scenarios, for example, a channel coding portion of a 5.1.3 channel coding, uplink control information, downlink control information and a Sidelink channel of the communication standard TS 36.212, which is not limited in the embodiment of the present invention.
The embodiment of the application is not only suitable for wireless communication, but also suitable for a series of application scenarios requiring coding and decoding, such as wired communication and data storage, and for the scenarios suitable for the embodiment of the application, the detailed description of the embodiment is omitted here.
Fig. 1 is a schematic diagram illustrating an architecture of a communication system provided in the present application. As shown in fig. 1, a communication system in the embodiment of the present application may include a transmitting end and a receiving end.
Optionally, when the sending end is a terminal device, the receiving end is a network device. And when the sending end is the network equipment, the receiving end is the terminal equipment.
The transmitting end may also be referred to as an encoding end. The sending end comprises an encoder, and can encode through the encoder and transmit the encoded sequence to the receiving end through a channel.
The receiving end may also be referred to as a decoding end. The receiving end comprises a decoder and can decode the received sequence through the decoder.
As shown in fig. 1, when the transmitting end is a terminal device and the receiving end is a network device, a channel used for transmitting information from the transmitting end to the receiving end may be referred to as an uplink channel, and a channel used for transmitting information from the receiving end to the transmitting end may be referred to as a downlink channel. The sending end can encode the information before sending the information, the encoded information is sent to the receiving end, and if the decoding of the receiving end fails, the retransmission can be realized based on the HARQ. The HARQ may be a technique formed by combining forward error correction coding (FEC) and automatic repeat request (ARQ). The HARQ-based communication method may be that, when the decoding of the receiving end fails, the receiving end may transmit an uncertain message to the transmitting end through the feedback link and request the transmitting end to retransmit the same data, and the receiving end merges and decodes the received data.
It should be noted that fig. 1 is a diagram illustrating an architecture of a communication system by way of example only, and is not a limitation to the architecture of the communication system.
Exemplarily, fig. 2 is a schematic flowchart of a decoding process performed by a receiving end according to an embodiment of the present disclosure.
The TB (containing a plurality of CBs) is encoded by the transmitting end and transmitted to the receiving end via the channel. As shown in fig. 2, at the receiving end, the input soft information (or may be understood as log likelihood ratio (llr)) passes through a de-interleaving/de-interleaving processing unit, an HARQ combining processing unit, a decoder decoding processing unit, a CB Cyclic Redundancy Check (CRC) unit, and the like, and finally, a CB CRC check result may be output.
For example, in a partial channel scenario, for example, in an extended typical urban channel model (ETU), an extended vehicle channel model (EVA) or other types of channels, a phenomenon that most or all CBs in the TB are decoded incorrectly may occur during the first transmission, and then soft information of the incorrectly decoded CBs needs to be stored in the HARQ Buffer.
When the capacity of the HARQ Buffer is insufficient, the method for CB processing based on HARQ provided in the embodiment of the present application may be adopted, and as shown by a dashed-line box in fig. 2, the number of the soft information of the CB stored in the HARQ Buffer is controlled by the CBBLER calculating unit and the HARQ Buffer control unit. When the receiving end decodes, the soft information of the CB stored in the HARQ Buffer can be acquired, and is combined with the correctly decoded soft information of the CB.
In a communication system, a TB may be divided into C CBs, for example, in an NR system, the TB may be divided into 152 CBs at most. At a receiving end, if all CBs in the TB have correct decoding, an ACK can be reported; if any CB decoding error exists, NACK can be reported. At a sending end, if the sending end receives ACK information, the HARQ process sends new data; if the transmitting end receives NACK information, the HARQ process retransmits the data. Therefore, if any CB decoding error exists at the receiving end, the transmitting end may retransmit the data based on HARQ.
Illustratively, in the NR system, HARQ retransmission of a Code Block Group (CBG) mode is also supported, and a TB may be divided into N (N = 2/4/6/8) CBGs, and each CBG includes several CBs. For example, the TB in NR can be divided into 152 CBs at most, so in CBG mode, the CBG contains 76 CBs at most. At a receiving end, if all the CBs in the CBG are translated, the CBG can report ACK; if any CB decoding error exists in the CBG, the CBG can report NACK. At a sending end, according to the ACK/NACK information of each CBG reported by a receiving end, CBG transmission indication field (CBGTI) information is generated and mapped into Downlink Control Information (DCI), and the corresponding CBG is retransmitted.
According to the 38.214 protocol, assuming that the TB can be maximally divided into N CBGs, and the total number of CBs in the TB is C, the number of CBGs in the TB may be:
M＝min(N，C)
get
M 1 ＝mod(C，M)
If M is 1 More than 0,m CBGs, which may comprise m.K 1 + k CBs, wherein M =0,1, \8230;, M1-1; k =0,1, \ 8230;, K1-1.
If M is 1 =0,m CBGs, may comprise CB M 1 ·K 1 +(m-M 1 )·K 2 + k CBs, where M = M 1 ，M 1 +1，…，M-1；k＝0，1，…，K 2 -1。
For example, the maximum number of CBGs in a TB =2, and the number of CBGs in a TB =13, the CBG partition manner of the TB is as shown in table 1 below:
TABLE 1
It can be understood that the method for processing the CB based on HARQ provided in the embodiment of the present application may also be applied to processing the CBG based on HARQ.
One possible implementation of the method for CB processing based on HARQ is that when the capacity of the HARQ Buffer is insufficient or the DDR bandwidth is insufficient, all soft information of CBs exceeding the storage capacity may be discarded.
However, the above method suffers from the effect similar to the "barrel effect" because the performance of the entire TB is limited by the portion of the CB discarded for storage due to the lack of all soft information of the portion of the CB discarded for storage.
In order to solve the above technical problem, an embodiment of the present application provides a method for processing a CB based on HARQ, which may obtain a block error rate of a current CB based on HARQ transmission, and when the block error rate satisfies a preset condition, may process both the number of soft information of a target CB in HARQ transmission and the number of soft information of a CB after the target CB and having failed in decoding into L, where the target CB may be the CB having failed in decoding corresponding to the case where the block error rate satisfies the preset condition, and L may be less than or equal to the number of soft information actually required by the CB for storage, so that in a scenario where a capacity of a HARQ Buffer or a DDR bandwidth is limited, each CB having a decoding error may store a part of soft information as much as possible, and thereby improving utilization efficiency of a HARQ Buffer. Refer specifically to the following examples of the present application.
Exemplarily, fig. 3 is a flowchart illustrating a method for CB processing based on HARQ according to an embodiment of the present application. As shown in fig. 3, the method may include the steps of:
s301, acquiring the block error rate of the CB based on the HARQ transmission.
In the embodiment of the present application, the block error rate of the CB is a ratio of the number of CB with decoding errors in the currently transmitted CB to the number of total CB currently transmitted.
For example, the block error rate of the current CB may be as shown in table 2:
TABLE 2
CBIdx represents the number of the current CB, CB BLER represents the CB error block rate, and CBErrCnt represents the number of the CBs with decoding errors in the currently transmitted CB.
And S302, under the condition that the block error rate meets the preset condition, processing the number of soft information of the target CB in the HARQ transmission and the number of soft information of the CB with decoding failure after the target CB into L.
In the embodiment of the present application, the target CB is a CB corresponding to which the current decoding fails when the block error rate satisfies the preset condition, and L is less than or equal to the number of soft information (or can be understood as the length of the soft information) actually required by the CB for storage.
For example, the preset condition of the block error rate may be set by a user to satisfy a block error rate threshold for obtaining an optimal L. It can be understood that the method for setting the block error rate may include other contents according to an actual scene, which is not limited in this embodiment of the application.
In the embodiment of the present application, if the block error rate of the CB does not satisfy the preset condition, the number of soft information actually required for storage in the CB may be cached in the HARQ cache.
For example, fig. 4 is a schematic diagram of processing soft information according to an embodiment of the present application. As shown in fig. 4, ncb is the maximum number in transmission per CB. The Ncb may be adjusted according to a rate matching method to match the carrying capacity of the physical channel, and when the channel is mapped, the bit rate required by the transmission format is achieved, and the number of LLRs in the adjusted Ncb is the actual number of LLRs. The rate matching method may include puncturing, repeating, and other methods.
In the actual number of LLRs, L soft information in the CB processing method based on HARQ provided in the embodiment of the present application may be obtained. Illustratively, the first L soft information in the actual number of LLRs may be obtained. It can be understood that the method for acquiring L pieces of soft information in a CB that has failed decoding may include other contents according to an actual scenario, which is not limited in this embodiment of the present application.
In the embodiment of the application, the length of the CB with decoding failure in the HARQ (or the number of soft information in the CB can be understood) can be processed as L when the block error rate of the CB meets the preset condition, so that when the capacity of the HARQ Buffer is insufficient or the DDR bandwidth is insufficient, a part of soft information can be stored in as many CBs with decoding failure as possible in the Buffer of the HARQ, and further, the utilization efficiency of the HARQ Buffer is improved.
In one possible embodiment, L satisfies:
L＝min(RealL，(T-CBNumThr*RealL)/(C-CBNumThr))
in the embodiment of the application, T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; c is the number of CBs in HARQ transmission, realL is the number of soft information needed by actual storage of the CBs, and CBNumThr is a preset CB number threshold.
Illustratively, the predetermined condition of CBNumThr may be set by the user to satisfy the CB number threshold for obtaining the optimal L. It is understood that the setting method of CBNumThr may include other contents according to actual scenarios, which is not limited in the embodiment of the present application.
For example, if 60 CBs with decoding failure need to be stored, each CB contains 10 soft information, a total space of 600 soft information is needed in the cache. If there are 400 spaces of soft information in the HARQ buffer and the threshold of the CB number is 10, it can be understood that the block error rate of the CB with the first 10 decoding failures may not need to be obtained. When the block error rate of the CB with the 11 th decoding failure exceeds a set threshold value. Then, from the 11 th CB with decoding failure to the 60 th CB with decoding failure, the number of the buffered soft information may be: (400-10 × 10)/(60-10), it is found that the number of soft messages of the decoding failed CB that can be buffered is 6.
In the embodiment of the application, when the capacity of the HARQ Buffer is insufficient or the DDR bandwidth is insufficient, a part of soft information can be stored in the CB meeting the decoding failure in the HARQ cache so as to obtain the performance consistent with that when the HARQ cache is sufficient.
In a possible embodiment, processing the number of soft information of the target CB in the HARQ transmission and the number of soft information of the CB whose decoding fails after the target CB to L includes: under the condition that the number of the soft information of the target CB is larger than L, selecting the first L pieces of soft information in the target CB; and/or selecting the first L pieces of soft information in the CB with the decoding failure after the target CB when the number of the soft information of the CB with the decoding failure after the target CB is larger than L.
In one possible embodiment, obtaining the block error rate of the CB based on HARQ transmission includes: acquiring the number of CB in HARQ transmission; and acquiring the block error rate when the number is larger than a first threshold value.
In a possible embodiment, the block error rate satisfying the predetermined condition includes:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
in the embodiment of the present application, CBBLER is a block error rate, CBBLERThr is a preset second threshold, CBErrThr is a CBBLER threshold represented by a 4-bit width, CBErrCnt represents the number of CBs in error in the current decoding process, CBIdx is the number of CBs, N is a constant, and CBBLERThr = CBErrThr/N.
Illustratively, the CBBLERThr is a threshold for a preset block error rate. The N is a constant set for ease of operation and for ease of hardware implementation. For example, when CBBLERThr is 0.9, N can be taken to be 16, and CBErrThr can be taken to be 14.4, which is more convenient for hardware implementation.
It can be understood that the value method of N may include other contents according to an actual scene, which is not limited in this embodiment of the application.
For example, the above equation can also be expressed as:
CBErrCnt≥(CBIdx+1)*CBBLERThr
in a possible embodiment, the method further comprises: and writing the CBs processed into the soft information with the number of L into the HARQ cache.
In a possible embodiment, the method further comprises: acquiring soft information of the CB with decoding failure stored in the HARQ cache; and decoding according to the soft information of the CB with failed decoding stored in the HARQ cache.
For example, an identifier may be set for the soft information of the CB stored in the HARQ buffer. For example, the identification may be a character, a string of characters, a number, or other type of identification such as bit information transmitted by one or more bits.
When decoding, the soft information of the CB whose decoding failed can be obtained according to the identifier in the HARQ buffer, and the soft information of the CB whose decoding succeeded is combined and decoded.
In the embodiment of the application, during decoding, the soft information of the CB with failed decoding stored in the HARQ buffer can be acquired, so that a better decoding effect can be acquired during combined decoding.
Based on the content described in the foregoing embodiments, an apparatus for CB processing based on HARQ is also provided in the embodiments of the present application. Exemplarily, fig. 5 is a schematic diagram of program modules of an apparatus for HARQ-based CB processing according to an embodiment of the present invention, where the apparatus includes an obtaining module 501 and a processing module 502.
An obtaining module 501, configured to obtain a block error rate of a CB based on HARQ transmission;
a processing module 502, configured to process the number of soft information of a target CB in HARQ transmission and the number of soft information of a CB whose decoding fails after the target CB to L when the block error rate satisfies a preset condition; the target CB is a CB which is corresponding to the current decoding failure when the block error rate meets the preset condition, and L is less than or equal to the number of soft information required by the actual storage of the CB.
In one possible embodiment, L satisfies:
L＝min(RealL，(T-CBNumThr*RealL)/(C-CBNumThr))
wherein, T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; c is the number of CBs in HARQ transmission, realL is the number of soft information needed by actual storage of the CBs, and CBNumThr is a preset CB number threshold.
In a possible implementation, the processing module 502 is specifically configured to:
under the condition that the number of the soft information of the target CB is larger than L, selecting the first L soft information in the target CB; and/or selecting the first L pieces of soft information in the CB with decoding failure after the target CB when the number of the soft information of the CB with decoding failure after the target CB is larger than L.
In a possible implementation, the obtaining module 501 is specifically configured to:
acquiring the number of CB in HARQ transmission; and acquiring the block error rate when the number is larger than a first threshold value.
In a possible embodiment, the block error rate satisfying the predetermined condition includes:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
the CBBLER is a block error rate, CBBLERThr is a preset second threshold, CBErrThr is a CBBLER threshold represented by a 4-bit width, CBErrCnt represents the number of CBs in error in the current decoding process, CBIdx is the number of CB, N is a constant, CBBLERThr = CBErrThr/N.
In a possible implementation, the processing module 502 is further configured to:
and writing the CBs processed into the soft information with the number of L into the HARQ cache.
In a possible implementation, the obtaining module 501 is further configured to:
acquiring soft information of CB with decoding failure stored in an HARQ cache; the processing module 502 is further configured to perform decoding according to the soft information of the CB with failed decoding stored in the HARQ buffer.
The apparatus for code block CB processing of HARQ provided in any of the foregoing embodiments may be configured to implement the schemes in the foregoing embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the processing module may be a separate processing element, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus calls and executes the functions of the above determination module. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element here may be an integrated circuit with signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 6, the apparatus may include: a processor 601 and a memory 602.
The processor 601 executes computer-executable instructions stored in the memory, so that the processor 601 performs the scheme in the above-described embodiments.
The processor 601 may be a general-purpose processor including a central processing unit CPU, a Network Processor (NP), and the like; but also a digital signal processor DSP, an application specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
The memory 602 stores computer-executable instructions, which may include Random Access Memory (RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the apparatus may further include: a system bus 603 and a memory 602 may be coupled to the processor 601 via the system bus 603 and may communicate with each other.
The system bus 603 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
Embodiments of the present application may also provide a computer-readable storage medium, in which computer instructions are stored, and when the computer instructions are executed on a computer, the computer is caused to execute the solution of the above embodiments.
The embodiment of the present application may further provide a chip for executing the instruction, where the chip is configured to execute the scheme in the foregoing embodiment.
Embodiments of the present application may also provide a computer program product, which includes a computer program stored in a computer-readable storage medium, and at least one processor may read the computer program from the computer-readable storage medium, and when the computer program is executed by the at least one processor, the solution in the above embodiments may be implemented.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (14)
1. A method for hybrid automatic repeat request-based code block processing, comprising:
acquiring the block error rate of a code block CB transmitted based on a hybrid automatic repeat request HARQ;
under the condition that the block error rate meets a preset condition, processing the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB with decoding failure behind the target CB into L;
the target CB is a CB which is corresponding to the current decoding failure when the block error rate meets the preset condition, and L is less than or equal to the number of soft information required by the actual storage of the CB; the L satisfies:
L＝min(RealL,(T-CBNumThr*RealL)/(C-CBNumThr))
the T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; the C is the number of the CBs in the HARQ transmission, the RealL is the number of the soft information actually required by the CBs, and the CBNumThr is a preset CB number threshold value.
2. The method as claimed in claim 1, wherein processing the number of soft information of the target CB in the HARQ transmission and the number of soft information of the CB whose decoding fails after the target CB to L, respectively, comprises:
under the condition that the number of the soft information of the target CB is larger than the L, selecting the first L soft information in the target CB; and/or the presence of a gas in the atmosphere,
and selecting the first L pieces of soft information in the CB with decoding failure after the target CB when the number of the soft information of the CB with decoding failure after the target CB is larger than the L.
3. The method as claimed in claim 1, wherein the obtaining the block error rate of the HARQ transmission based CB comprises:
acquiring the number of the CB in the HARQ transmission;
and acquiring the block error rate under the condition that the number is greater than a first threshold value.
4. The method according to claim 3, wherein the block error rate satisfying a predetermined condition comprises:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
the CBBLER is the block error rate, the CBBLERThr is a preset second threshold, the CBErrThr is a CBBLER threshold represented by a 4-bit width, the CBErrCnt represents the number of CBs in the middle error of the current decoding process, the CBIdx is the number of CBs, the N is a constant, and the CBBLERThr = CBErrThr/N.
5. The method according to any one of claims 1-4, further comprising:
and writing the CBs with the soft information number of L into an HARQ cache.
6. The method of claim 5, further comprising:
acquiring soft information of the CB with decoding failure stored in the HARQ cache;
and decoding according to the soft information of the CB with failed decoding stored in the HARQ cache.
7. An apparatus for hybrid automatic repeat request-based code block processing, comprising:
the acquisition module is used for acquiring the block error rate of the CB based on HARQ transmission;
a processing module, configured to process the number of soft information of a target CB in the HARQ transmission and the number of soft information of a CB whose decoding fails after the target CB to L when the block error rate satisfies a preset condition; the target CB is a CB which is corresponding to the current decoding failure when the block error rate meets the preset condition, and L is less than or equal to the number of soft information required by the actual storage of the CB; the L satisfies:
L＝min(RealL,(T-CBNumThr*RealL)/(C-CBNumThr))
the T is the number of the maximum soft information which can be stored in the HARQ cache of the CB used for storing the decoding failure; the C is the number of the CBs in the HARQ transmission, the RealL is the number of the soft information actually required by the CBs, and the CBNumThr is a preset CB number threshold value.
8. The apparatus of claim 7, wherein the processing module is specifically configured to:
under the condition that the number of the soft information of the target CB is larger than the L, selecting the first L pieces of soft information in the target CB; and/or selecting the first L pieces of soft information in the CB with the decoding failure after the target CB when the number of the soft information of the CB with the decoding failure after the target CB is larger than the L.
9. The apparatus of claim 7, wherein the obtaining module is specifically configured to:
acquiring the number of the CB in the HARQ transmission; and acquiring the block error rate under the condition that the number is greater than a first threshold value.
10. The apparatus of claim 9, wherein the block error rate satisfying a predetermined condition comprises:
CBBLER≥CBBLERThr
or,
CBErrCnt*N≥(CBIdx+1)*CBErrThr
the CBBLER is the block error rate, the CBBLERThr is a preset second threshold, the CBErrThr is a CBBLER threshold represented by a 4-bit width, the CBErrCnt represents the number of CBs in the middle error of the current decoding process, the CBIdx is the number of CBs, the N is a constant, and the CBBLERThr = CBErrThr/N.
11. The apparatus according to any one of claims 7-10, wherein the processing module is further configured to:
and writing the CBs with the soft information number of L into an HARQ cache.
12. The apparatus of claim 11, wherein the obtaining module is further configured to:
acquiring soft information of the CB with decoding failure stored in the HARQ cache; the processing module is further configured to decode according to the soft information of the CB with failed decoding stored in the HARQ buffer.
13. An electronic device, comprising:
a memory for storing program instructions;
a processor for invoking and executing program instructions in said memory for performing the method of any of claims 1-6.
14. A computer-readable storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, carries out the method according to any one of claims 1-6.
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