CN111294834A - PDSCH decoding method and device, storage medium and terminal - Google Patents

PDSCH decoding method and device, storage medium and terminal Download PDF

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CN111294834A
CN111294834A CN201910594551.8A CN201910594551A CN111294834A CN 111294834 A CN111294834 A CN 111294834A CN 201910594551 A CN201910594551 A CN 201910594551A CN 111294834 A CN111294834 A CN 111294834A
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pdsch
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ssb
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CN111294834B (en
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谭霞
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

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Abstract

A method and device for decoding PDSCH, a storage medium and a terminal, wherein the method comprises the following steps: determining a value of a preset quality parameter of the PDSCH; if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH; coding the first PDSCH; if the first PDSCH is decoded incorrectly, receiving the PDSCH by adopting the next wave beam of the wave beam with the strongest signal as a second PDSCH; decoding the first merged PDSCH; and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, and merging and decoding the PDSCH with the first merged PDSCH at the previous time. The scheme of the invention can optimize the decoding of the broadcast data.

Description

PDSCH decoding method and device, storage medium and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a PDSCH decoding method and apparatus, a storage medium, and a terminal.
Background
In the 5G New Radio (NR) technology, the main frequency band used is high frequency, and a Beam (Beam) is used for data transmission in order to improve transmission quality. Since the base station cannot determine the beam where the UE is located, the base station may transmit the same broadcast data on each beam, and a Physical Downlink Control Channel (PDCCH) scheduling the broadcast data may also be transmitted on each beam.
The current broadcast data processing method mainly adopts the strongest wave beam to receive the broadcast data, and the decoding error or the omission of the broadcast data is easy to occur.
There is a need for a decoding method for a Physical Downlink Shared Channel (PDSCH), which can optimize the receiving process of broadcast data in the above scenario.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a PDSCH decoding method and device, a storage medium and a terminal, which can enable UE to adaptively combine a multi-beam and tracking combination mechanism according to a decoding result to optimize the decoding of broadcast data.
To solve the above technical problem, an embodiment of the present invention provides a PDSCH decoding method, including the following steps: determining a value of a preset quality parameter of the PDSCH; if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH; coding the first PDSCH; if the first PDSCH is decoded incorrectly, receiving a PDSCH by adopting a next wave beam of the wave beam with the strongest signal as a second PDSCH, and combining the second PDSCH and the first PDSCH to obtain a first combined PDSCH; decoding the first merged PDSCH; and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, merging the PDSCH with the first merged PDSCH at the previous time, and decoding the PDSCH until the decoding of the PDSCH after merging is successful or the SSB index of the current beam exceeds the upper limit value.
Optionally, combining the second PDSCH and the first PDSCH by using a tracking combining method according to channel ratio weighting; and/or combining the PDSCH after the first combination with the PDSCH after the first combination in a tracking combination mode according to channel ratio weighting.
Optionally, the PDSCH decoding method further includes: if the value of the preset quality parameter is smaller than a preset threshold value, receiving a PDSCH by adopting a wave beam indicated by an SSB initial index as a third PDSCH; decoding the third PDSCH.
Optionally, the PDSCH decoding method further includes: if the third PDSCH is decoded incorrectly, adding one to the SSB initial index to obtain an SSB decoding index, receiving the PDSCH by adopting a beam corresponding to the SSB decoding index to serve as a fourth PDSCH, and combining the fourth PDSCH and the third PDSCH to obtain a second combined PDSCH; decoding the second merged PDSCH; and adding one to the former SSB decoding index to obtain the latter SSB decoding index when the merged PDSCH is decoded incorrectly, receiving the PDSCH by adopting the latter SSB decoding index, and merging the PDSCH with the second merged PDSCH of the previous time until the merged PDSCH is decoded successfully or the latter SSB decoding index exceeds the upper limit value.
Optionally, combining the fourth PDSCH and the third PDSCH by using a tracking combining method according to channel ratio weighting; and/or combining the PDSCH after the second combination with the PDSCH after the previous second combination by adopting a tracking combination mode according to channel ratio weighting.
Optionally, the PDSCH is stored in a buffer whenever a coding error occurs.
To solve the above technical problem, an embodiment of the present invention provides a PDSCH decoding apparatus, including: a quality determination module adapted to determine a value of a preset quality parameter of the PDSCH; a first PDSCH determining module, adapted to receive the PDSCH using the beam with the strongest signal in the available beam set as the first PDSCH when the value of the preset quality parameter is greater than or equal to a preset threshold; a first decoding module adapted to decode the first PDSCH; a first combining module, adapted to receive the PDSCH using a next beam of the beam with the strongest signal as a second PDSCH and combine the second PDSCH with the first PDSCH to obtain a first combined PDSCH when the first PDSCH is decoded incorrectly; a second decoding module, adapted to decode the first merged PDSCH; and the second combining module is suitable for receiving the PDSCH by adopting the wave beam with the strongest signal every time the decoding of the PDSCH after combination is wrong, and combining and decoding the PDSCH and the PDSCH after the previous first combination until the decoding of the PDSCH after combination is successful or the SSB index of the current wave beam exceeds the upper limit value.
Optionally, the PDSCH decoding device further includes: a third PDSCH determining module, adapted to receive a PDSCH using a beam indicated by an SSB initial index as a third PDSCH when the value of the preset quality parameter is smaller than a preset threshold; and the third decoding module is suitable for decoding the third PDSCH.
Optionally, the PDSCH decoding device further includes: the third combining module is suitable for adding one to the SSB initial index to obtain an SSB decoding index when the third PDSCH is decoded incorrectly, receiving the PDSCH by adopting a beam indicated by the SSB decoding index to serve as a fourth PDSCH, and performing tracking combination on the fourth PDSCH and the third PDSCH according to channel ratio weighting to obtain a second combined PDSCH; a fourth decoding module, adapted to decode the second merged PDSCH; and the fourth merging module is suitable for adding one to the previous SSB decoding index to obtain a next SSB decoding index when the merged PDSCH is decoded incorrectly, receiving the PDSCH by adopting the next SSB decoding index, and performing tracking merging with the second merged PDSCH at the previous time according to channel ratio weighting until the merged PDSCH is decoded successfully or the next SSB decoding index exceeds the upper limit value.
To solve the above technical problem, an embodiment of the present invention provides a storage medium having stored thereon computer instructions, which when executed perform the steps of the decoding method described above.
In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the decoding method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the value of the preset quality parameter of the PDSCH is determined; if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH; coding the first PDSCH; if the first PDSCH is decoded incorrectly, receiving a PDSCH by adopting a next wave beam of the wave beam with the strongest signal as a second PDSCH, and combining the second PDSCH and the first PDSCH to obtain a first combined PDSCH; decoding the first merged PDSCH; and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, merging the PDSCH with the first merged PDSCH at the previous time, and decoding the PDSCH until the decoding of the PDSCH after merging is successful or the SSB index of the current beam exceeds the upper limit value. By adopting the scheme, after the decoding error of the first PDSCH is set, the next beam of the beam with the strongest signal is adopted to continuously receive the PDSCH as the second PDSCH, the second PDSCH is combined with the first PDSCH, and the PDSCH is continuously received by adopting the next beam every time the decoding error occurs.
Further, when the value of the preset quality parameter is smaller, the beam indicated by the SSB initial index is used to receive the PDSCH as the third PDSCH, and one is added to the SSB initial index to obtain the SSB decoding index, and the beam indicated by the SSB decoding index is used to receive the PDSCH, so that the UE can adaptively combine the multi-beam and tracking combining mechanism to optimize the decoding of the broadcast data according to the decoding result under the condition that the channel quality of the UE is poor.
Drawings
Fig. 1 is a flowchart of a PDSCH decoding method according to an embodiment of the present invention;
fig. 2 is a partial flowchart of another PDSCH decoding method according to an embodiment of the present invention;
fig. 3 is a flowchart of a PDSCH decoding method according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a monitored location of a PDCCH indicated by SSB index in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a PDSCH decoding apparatus according to an embodiment of the present invention;
fig. 6 is a schematic partial structure diagram of another PDSCH decoding apparatus according to an embodiment of the present invention.
Detailed Description
As described above, in the 5G NR technique, the main frequency band used is a high frequency, and a Beam (Beam) is used for data transmission in order to improve transmission quality. However, the current broadcast data processing method mainly uses the strongest beam to receive the broadcast data, and decoding errors or missing detection of the broadcast data are easy to occur.
The inventor has found through research that, in the prior art, a beam with the strongest signal is used to receive the broadcast data, and only one piece of data is received, which can meet the requirement in the cell center area or the environment with better channel condition, but in the cell edge or the environment with poor channel condition, the problem of decoding error or missing detection of the broadcast data can occur at a high rate.
In the embodiment of the invention, the value of the preset quality parameter of the PDSCH is determined; if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH; coding the first PDSCH; if the first PDSCH is decoded incorrectly, receiving a PDSCH by adopting a next wave beam of the wave beam with the strongest signal as a second PDSCH, and combining the second PDSCH and the first PDSCH to obtain a first combined PDSCH; decoding the first merged PDSCH; and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, merging the PDSCH with the first merged PDSCH at the previous time, and decoding the PDSCH until the decoding of the PDSCH after merging is successful or the SSB index of the current beam exceeds the upper limit value. By adopting the scheme, after the decoding error of the first PDSCH is set, the PDSCH is received by adopting the wave beam with the strongest signal and is used as the second PDSCH, and the second PDSCH and the first PDSCH are combined to obtain the first combined PDSCH, so that the UE can adaptively combine a multi-beam and tracking combination mechanism according to the decoding result under the condition of better channel quality, and the decoding of the broadcast data is optimized.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart of a PDSCH decoding method according to an embodiment of the present invention. The PDSCH decoding method may be applied to the UE side, and may further include steps S11 to S16:
step S11: determining a value of a preset quality parameter of the PDSCH;
step S12: if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH;
step S13: coding the first PDSCH;
step S14: if the first PDSCH is decoded incorrectly, adopting the wave beam with the strongest signal to receive the PDSCH of the next wave beam as a second PDSCH, and combining the second PDSCH and the first PDSCH to obtain a first combined PDSCH;
step S15: decoding the first merged PDSCH;
step S16: and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, merging the PDSCH with the first merged PDSCH at the previous time, and decoding the PDSCH until the decoding of the PDSCH after merging is successful or the SSB index of the current beam exceeds the upper limit value.
In a specific implementation of step S11, the Channel Quality indication parameter may be selected from a Signal-to-Noise Ratio (SNR) of the Channel, a Channel Quality Indication (CQI), and a Power Headroom (PH).
The SNR is also referred to as signal-to-noise ratio, which is the ratio of signal to noise in the PDSCH channel.
The CQI is mainly determined by detecting a Signal to interference plus noise ratio (SINR), and may represent channel quality of a downlink channel.
The power headroom is a difference between the maximum transmission power of the UE and the transmission power of a Physical Uplink Shared Channel (PUSCH) obtained by current estimation, and may represent the quality of the uplink channel.
Preferably, an SNR may be used as the preset quality parameter, and when the value of the SNR is greater than or equal to a preset SNR threshold, it may be determined that the channel quality is better; when the value of the SNR is less than a preset SNR threshold, it may be determined that the channel quality is poor.
It should be noted that other suitable preset quality parameters may also be adopted, and in the embodiment of the present invention, the selection of the specific parameters is not limited.
In a specific implementation of step S12, if the value of the preset quality parameter is greater than or equal to a preset threshold, the UE may receive the PDSCH using the beam with the strongest signal in the available beam set as the first PDSCH.
In an implementation, the base station may transmit the same broadcast data on a plurality of beams, and the UE may regard the plurality of beams as an available beam set, and the plurality of beams have a predetermined order therebetween, for example, may use a Synchronization Signal Block (SSB) Index (Index) to indicate, and determine a strongest beam therein.
It should be noted that, the UE may determine the beam with the strongest signal in the available beam set by using an existing appropriate manner, and then use the strongest beam to receive the broadcast data, which is not limited in this embodiment of the present invention.
In the embodiment of the invention, when the signal quality is better, the UE is set to firstly adopt the strongest wave beam to receive the broadcast data, which is beneficial to improving the decoding accuracy.
In an implementation of step S13, the UE may decode the first PDSCH.
In a specific implementation, if the decoding is correct, the decoding step of the PDSCH may be ended; and if the decoding is wrong, setting to continue receiving the PDSCH by adopting the subsequent wave beam, and decoding.
In a specific implementation of step S14, if the first PDSCH is decoded incorrectly, the UE may receive the PDSCH using a beam next to the beam with the strongest signal as the second PDSCH, and combine the second PDSCH and the first PDSCH to obtain the first combined PDSCH.
In the embodiment of the present invention, after a decoding error of the first PDSCH is set, the next beam of the beam with the strongest signal is used to continue receiving the PDSCH as the second PDSCH.
Further, the second PDSCH and the first PDSCH may be combined by tracking and combining according to channel ratio weighting.
Specifically, the following description is given with reference to the Synchronization Signal Block (SSB) and the Remaining Minimum System Information (RMSI) indicated by the search space set (CORESET 0), and the processing flow of other System messages (System Information, SI) and Paging (Paging) is similar.
Wherein, the SSB related RMSI corresponds to the frame number SFNcAnd the time slot number n0The following formula needs to be satisfied:
when in use
Figure BDA0002117201630000071
The method comprises the following steps: SFNCmod2＝0；
When in use
Figure BDA0002117201630000072
The method comprises the following steps: SFNCmod2＝1；
Figure BDA0002117201630000073
Where i is used to indicate the SSB Index (Index), and u can be determined according to the signaling "subcarriersspacingmmon" and the frequency band in which the cell is located; o and M can be confirmed by the signaling "searchSpacezero" and "subCrierSpacingCommon" of Pdcch-configSIB1 information in the MIB, looking at tables 13-11 and 13-12 of 38.213.
And tracking (Chase) combination, namely adding the same code words with the successively received code rates of Rs to finally obtain the code words with the same code rate of Rs, and then sending the combined result to a decoder to finish decoding. Because the content transmitted by the base station at each BEAM is the same, chase combining may be used.
Further, a tracking combination manner is adopted according to the channel ratio weighting, which may be that after weighting summation is performed according to different channel quality parameters according to a preset weighting coefficient, the obtained results are tracked and combined to obtain the first combined PDSCH.
In the embodiment of the invention, the tracking and combining are carried out by adopting a tracking and combining mode according to the channel ratio weighting, which is beneficial to enabling the UE to adaptively combine a multi-beam and tracking and combining mechanism according to the decoding result and optimize the decoding of the broadcast data.
In an implementation of step S15, the first merged PDSCH is decoded.
In a specific implementation, if the decoding is correct, the decoding step of the PDSCH may be ended; and if the decoding is wrong, setting to continue receiving the PDSCH by adopting the subsequent beam, and combining and decoding.
In the specific implementation of step S16, each time the decoding of the first merged PDSCH is incorrect, another next beam is used to receive the PDSCH, and the PDSCH is merged and decoded with the previous first merged PDSCH until the decoding of the merged PDSCH is successful or the SSB index of the current beam exceeds the upper limit value.
In a specific implementation, the SSB index exceeding the upper limit value may be used to indicate whether the beams in the available beam set have been adopted, wherein the beams may be adopted for reception in a preset order starting from the beam with the strongest signal until reaching the last beam in the available beam set.
Further, after receiving the PDSCH using the next beam, combining the PDSCH with the first combined PDSCH of the previous time by tracking and combining according to the channel ratio weighting.
In the embodiment of the present invention, after a decoding error of the first PDSCH is set, the next beam of the beam with the strongest signal is used to continue receiving the PDSCH as the second PDSCH, and the second PDSCH is combined with the first PDSCH, and then the next beam is used to continue receiving the PDSCH every time the decoding error occurs.
Referring to fig. 2, fig. 2 is a partial flowchart of another PDSCH decoding method according to an embodiment of the present invention. The another PDSCH decoding method may be used on the UE side, and may include steps S11 to S16 shown in fig. 1, step S21 to step S22, and step S21 to step S25:
step S21: if the value of the preset quality parameter is smaller than a preset threshold value, receiving a PDSCH by adopting a wave beam indicated by an SSB initial index as a third PDSCH;
step S22: code the third PDSCH;
step S23: if the third PDSCH is decoded incorrectly, adding one to the SSB initial index to obtain an SSB decoding index, receiving the PDSCH by adopting the beam indicated by the SSB decoding index to serve as a fourth PDSCH, and combining the fourth PDSCH and the third PDSCH to obtain a second combined PDSCH;
step S24: decoding the second merged PDSCH;
step S25: and adding one to the former SSB decoding index to obtain the latter SSB decoding index when the merged PDSCH is decoded incorrectly, receiving the PDSCH by adopting the latter SSB decoding index, and merging the PDSCH with the second merged PDSCH of the previous time until the merged PDSCH is decoded successfully or the latter SSB decoding index exceeds the upper limit value.
In a specific implementation of step S21, when the value of the preset quality parameter is smaller than the preset threshold, it may be determined that the signal quality is poor, and the UE may receive the PDSCH by using the beam indicated by the SSB initial index.
It should be noted that the mapping relationship between the SSB indexes and the available beam set may be preset, so that when the SSB indexes are incremented, the SSB indexes may correspond to preset beams.
Further, the SSB index may be set to have a one-to-one correspondence with the set of available beams, so that when the SSB index is incremented by one, a next beam corresponding to the current beam is set.
Further, the beam indicated by the SSB initial index may also be the first beam in the set of available beams.
In the embodiment of the present invention, when the signal quality is poor, the UE is set to receive the broadcast data by using the beam indicated by the SSB initial index, which is beneficial to trying more beams in the available beam set as much as possible, or even having an opportunity to try all beams in the available beam set, thereby being beneficial to improving the decoding accuracy under the condition of increasing the number of beams.
In an implementation of step S22, the third PDSCH is decoded.
Specifically, if the decoding is correct, the UE may end the decoding step of the PDSCH; and if the decoding is wrong, setting to continue receiving the PDSCH by adopting the subsequent wave beam, and decoding.
In a specific implementation of step S23, if the third PDSCH is decoded incorrectly, the SSB initial index may be incremented by one to obtain an SSB decoded index, and the beam indicated by the SSB decoded index is used to receive the PDSCH as the fourth PDSCH, and the fourth PDSCH and the third PDSCH are merged to obtain the second merged PDSCH;
in the embodiment of the present invention, after a third PDSCH decoding error is set, a beam corresponding to the next SSB index is used to continue receiving the PDSCH as the fourth PDSCH, and compared with the prior art in which only the beam with the strongest signal is used to perform a single attempt, the scheme of the embodiment of the present invention is used to help improve the decoding accuracy by receiving and attempting to decode for multiple times.
Further, the fourth PDSCH and the third PDSCH may be combined by tracking and combining according to channel ratio weighting.
For more details about the way of performing tracking and combining according to channel ratio weighting, please refer to the related description of step S14 in fig. 1, which is not described herein again.
In an implementation of step S24, the UE may decode the second merged PDSCH. In a specific implementation, if the decoding is correct, the decoding step of the PDSCH may be ended; and if the decoding is wrong, setting to continue receiving the PDSCH by adopting the subsequent beam, and combining and decoding.
In the specific implementation of step S25, every time the second merged PDSCH is decoded incorrectly, add one to the previous SSB decoding index to obtain a next SSB decoding index, and receive the PDSCH using the next SSB decoding index, and merge with the previous second merged PDSCH until the merged PDSCH is decoded successfully or the next SSB decoding index exceeds the upper limit.
In a specific implementation, the last SSB decoding index exceeding the upper limit value may be used to indicate whether a beam in the available beam set has been adopted, where the corresponding beam may be adopted for reception in an order of a preset SSB index from the beam indicated by the SSB initial index until reaching the last beam in the available beam set.
Further, after receiving the PDSCH using the subsequent SSB decoding index, the PDSCH may be combined with the second PDSCH after the previous combining in a tracking and combining manner according to the channel ratio weighting.
In the embodiment of the present invention, after a third PDSCH decoding error is set, the SSB initial index is incremented by one, the PDSCH is continuously received by using the beam indicated by the next SSB decoding index, and the fourth PDSCH is combined with the third PDSCH, and then the PDSCH is continuously received by using the beam indicated by the next SSB decoding index after each decoding error.
Referring to fig. 3, fig. 3 is a flowchart of a PDSCH decoding method according to another embodiment of the present invention. The still another PDSCH decoding method may include steps S301 to S320, and the respective steps will be described below.
In step S301, a value of a preset quality parameter of the PDSCH is determined.
In step S302, it is determined whether the value of the preset quality parameter is greater than or equal to a preset threshold; when the judgment result is yes, step S303 may be performed; otherwise, step S312 may be performed.
In step S303, the PDSCH is received using the strongest signal beam in the available beam set as the first PDSCH.
In step S304, the first PDSCH is decoded.
In step S305, it is determined whether a decoding error occurs; when the judgment result is yes, step S306 may be performed; otherwise, the decoding process is finished.
In step S306, a PDSCH is received using a beam next to the beam with the strongest signal as a second PDSCH.
In step S307, the second PDSCH is merged with the first PDSCH.
In step S308, the merged PDSCH is decoded.
In step S309, it is determined whether a decoding error occurs; when the judgment result is yes, step S310 may be performed; otherwise, the decoding process is finished.
In step S310, it is determined whether the SSB index of the current beam exceeds an upper limit value; when the judgment result is yes, step S310 may be performed; otherwise, the decoding process is finished.
In step S311, the PDSCH is received by the next beam and combined with the first combined PDSCH, and step S308 may be executed to decode the combined PDSCH.
In step S312, the PDSCH is received using the beam indicated by the SSB initial index as the third PDSCH.
In step S313, the third PDSCH is decoded.
In step S314, it is determined whether a decoding error occurs; when the judgment result is yes, step S315 may be performed; otherwise, the decoding process is finished.
In step S315, add one to the SSB initial index to obtain an SSB decoding index, and receive the PDSCH using the beam indicated by the SSB decoding index as a fourth PDSCH.
In step S316, the fourth PDSCH and the third PDSCH are combined.
In step S317, the merged PDSCH is decoded.
In step S318, it is determined whether there is a decoding error; when the determination result is yes, step S319 may be performed; otherwise, the decoding process is finished.
In step S319, it is determined whether the subsequent SSB decoding index exceeds the upper limit value; when the judgment result is yes, step S310 may be performed; otherwise, the decoding process is finished.
In step S320, the previous SSB decoding index is incremented by one to obtain a next SSB decoding index, and the PDSCH is received by using the next SSB decoding index and merged with the second merged PDSCH of the previous time, so that step S317 may be performed to decode the merged PDSCH.
In the specific implementation, more details about step S301 to step S320 are executed with reference to the step descriptions in fig. 1 and fig. 2, which are not described herein again.
Referring to fig. 4, fig. 4 is a schematic diagram of a monitored location of a PDCCH indicated by an SSB index in an embodiment of the present invention.
In a specific implementation, the PDSCH to be decoded may be determined according to the PDCCH indicated by the SSB index.
As shown in fig. 4, the location of the PDCCH for scheduling RMSI can be obtained by configuring MIB signaling PDCCH-ConfigSIB1, and meanwhile, the UE needs to monitor the PDCCH of two consecutive slots indicated by the SSB index, which mainly includes four scenarios. Wherein, in the four scenarios, each scenario corresponds to a time domain position of the PDCCH scheduling the RMSI on the CORESET 0.
M is 0.5, the first symbol is 0 or 7: monitoring positions of the PDCCH indicated by SSB 0 are slot 0 and symbol 0 of slot 1; the monitored positions of the PDCCH indicated by SSB 1 are slot 0 and slot 1 symbol 7, and other SSB indexes are similar.
M ═ 0.5, the first symbol is 0 or the CORSET symbol length: monitoring positions of the PDCCH indicated by SSB 0 are slot 0 and symbol 0 of slot 1; the monitored positions of the PDCCH indicated by SSB 1 are the CORSET symbol lengths of slot 0 and slot 1, and other SSB indexes are similar.
M ═ 1, the first symbol 0/1/2: symbol 0/1/2 where the monitored positions of the PDCCH indicated by SSB 0 are slot 0 and slot 1; the monitored positions of the PDCCH indicated by SSB 1 are slot 0 and slot 1 symbols 0/1/2, and other SSB indexes are similar.
M ═ 2, the first symbol is 0/1/2: symbol 0/1/2 where the monitored positions of the PDCCH indicated by SSB 0 are slot 0 and slot 1; the monitored positions of the PDCCH indicated by SSB 1 are the symbols 0/1/2 of slot 2 and slot 3, and other SSBs are similarly indexed.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a PDSCH decoding apparatus according to an embodiment of the present invention.
The PDSCH decoding device may include:
a quality determination module 51 adapted to determine a value of a preset quality parameter of the PDSCH;
a first PDSCH determining module 52, adapted to receive the PDSCH by using the beam with the strongest signal in the available beam set as the first PDSCH when the value of the preset quality parameter is greater than or equal to the preset threshold;
a first decoding module 53, adapted to decode the first PDSCH;
a first combining module 54, adapted to receive the PDSCH using a next beam of the beam with the strongest signal as a second PDSCH and combine the second PDSCH with the first PDSCH to obtain a first combined PDSCH when the first PDSCH is decoded incorrectly;
a second decoding module 55, adapted to decode the first merged PDSCH;
the second combining module 56 is adapted to receive the PDSCH by using the beam with the strongest signal every time the decoding of the combined PDSCH is incorrect, combine the PDSCH with the first combined PDSCH of the previous time, and decode the PDSCH until the decoding of the combined PDSCH is successful or the SSB index of the current beam exceeds the upper limit value.
For the principle, specific implementation and beneficial effects of the decoding apparatus, please refer to the foregoing description related to the decoding method shown in fig. 1, which is not repeated herein.
Fig. 6 is a schematic partial structure diagram of another PDSCH decoding apparatus according to an embodiment of the present invention. The another PDSCH decoding apparatus may include the modules shown in fig. 5, and may further include:
a third PDSCH determining module 61, adapted to receive a PDSCH using a beam indicated by the SSB initial index as a third PDSCH when the value of the preset quality parameter is smaller than a preset threshold;
a third decoding module 62, adapted to decode the third PDSCH.
The another PDSCH decoding apparatus may further include:
a third combining module 63, adapted to add one to the SSB initial index to obtain an SSB decoding index when the third PDSCH decoding is incorrect, receive the PDSCH using the beam indicated by the SSB decoding index as a fourth PDSCH, and perform tracking combining on the fourth PDSCH and the third PDSCH according to channel ratio weighting to obtain a second combined PDSCH;
a fourth decoding module 64, adapted to decode the second merged PDSCH;
the fourth merging module 65 is adapted to add one to the previous SSB decoding index to obtain a next SSB decoding index whenever the merged PDSCH is decoded incorrectly, receive the PDSCH using the next SSB decoding index, and perform tracking merging with the second merged PDSCH of the previous time according to channel ratio weighting until the merged PDSCH is decoded successfully or the next SSB decoding index exceeds the upper limit.
For the principle, specific implementation and beneficial effects of the decoding apparatus, please refer to the related descriptions related to the decoding method shown in fig. 2 to fig. 3, which are not repeated herein.
It should be noted that the technical solution of the present invention is applicable to a 5G (5Generation) communication system, a 4G communication system, a 3G communication system, and various future new communication systems, such as 6G, 7G, and the like.
The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the steps of the decoding method are executed when the computer instructions are operated. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be another general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile 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 example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).
The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps of the above decoding method when running the computer instruction. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment of the present application.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A method for decoding a PDSCH, comprising the steps of:
determining a value of a preset quality parameter of the PDSCH;
if the value of the preset quality parameter is larger than or equal to a preset threshold value, adopting the wave beam with the strongest signal in the available wave beam set to receive the PDSCH as a first PDSCH;
coding the first PDSCH;
if the first PDSCH is decoded incorrectly, receiving a PDSCH by adopting a next wave beam of the wave beam with the strongest signal as a second PDSCH, and combining the second PDSCH and the first PDSCH to obtain a first combined PDSCH;
decoding the first merged PDSCH;
and when the decoding of the first merged PDSCH is wrong, receiving the PDSCH by adopting the next beam, merging the PDSCH with the first merged PDSCH at the previous time, and decoding the PDSCH until the decoding of the PDSCH after merging is successful or the SSB index of the current beam exceeds the upper limit value.
2. The PDSCH decoding method according to claim 1,
combining the second PDSCH and the first PDSCH in a tracking and combining mode according to channel ratio weighting;
and/or the presence of a gas in the gas,
and combining the PDSCH after the first combination with the PDSCH after the first combination in a tracking and combining mode according to the channel ratio weighting.
3. The method for decoding the PDSCH of claim 1, further comprising:
if the value of the preset quality parameter is smaller than a preset threshold value, receiving a PDSCH by adopting a wave beam indicated by an SSB initial index as a third PDSCH;
decoding the third PDSCH.
4. The PDSCH decoding method according to claim 3, further comprising:
if the third PDSCH is decoded incorrectly, adding one to the SSB initial index to obtain an SSB decoding index, receiving the PDSCH by adopting a beam corresponding to the SSB decoding index to serve as a fourth PDSCH, and combining the fourth PDSCH and the third PDSCH to obtain a second combined PDSCH;
decoding the second merged PDSCH;
and adding one to the former SSB decoding index to obtain the latter SSB decoding index when the merged PDSCH is decoded incorrectly, receiving the PDSCH by adopting the latter SSB decoding index, and merging the PDSCH with the second merged PDSCH of the previous time until the merged PDSCH is decoded successfully or the latter SSB decoding index exceeds the upper limit value.
5. The PDSCH decoding method according to claim 4,
combining the fourth PDSCH and the third PDSCH in a tracking and combining mode according to channel ratio weighting;
and/or the presence of a gas in the gas,
and combining the PDSCH after the second combination with the PDSCH after the previous second combination by adopting a tracking combination mode according to the channel ratio weighting.
6. The PDSCH decoding method according to claim 1,
storing the PDSCH in a buffer whenever a coding error occurs.
7. An apparatus for decoding a PDSCH, comprising:
a quality determination module adapted to determine a value of a preset quality parameter of the PDSCH;
a first PDSCH determining module, adapted to receive the PDSCH using the beam with the strongest signal in the available beam set as the first PDSCH when the value of the preset quality parameter is greater than or equal to a preset threshold;
a first decoding module adapted to decode the first PDSCH;
a first combining module, adapted to receive the PDSCH using a next beam of the beam with the strongest signal as a second PDSCH and combine the second PDSCH with the first PDSCH to obtain a first combined PDSCH when the first PDSCH is decoded incorrectly;
a second decoding module, adapted to decode the first merged PDSCH;
and the second combining module is suitable for receiving the PDSCH by adopting the wave beam with the strongest signal every time the decoding of the PDSCH after combination is wrong, and combining and decoding the PDSCH and the PDSCH after the previous first combination until the decoding of the PDSCH after combination is successful or the SSB index of the current wave beam exceeds the upper limit value.
8. The PDSCH decoding apparatus according to claim 7, further comprising:
a third PDSCH determining module, adapted to receive a PDSCH using a beam indicated by an SSB initial index as a third PDSCH when the value of the preset quality parameter is smaller than a preset threshold;
and the third decoding module is suitable for decoding the third PDSCH.
9. The PDSCH decoding apparatus according to claim 8, further comprising:
the third combining module is suitable for adding one to the SSB initial index to obtain an SSB decoding index when the third PDSCH is decoded incorrectly, receiving the PDSCH by adopting a beam indicated by the SSB decoding index to serve as a fourth PDSCH, and performing tracking combination on the fourth PDSCH and the third PDSCH according to channel ratio weighting to obtain a second combined PDSCH;
a fourth decoding module, adapted to decode the second merged PDSCH;
and the fourth merging module is suitable for adding one to the previous SSB decoding index to obtain a next SSB decoding index when the merged PDSCH is decoded incorrectly, receiving the PDSCH by adopting the next SSB decoding index, and performing tracking merging with the second merged PDSCH at the previous time according to channel ratio weighting until the merged PDSCH is decoded successfully or the next SSB decoding index exceeds the upper limit value.
10. A storage medium having stored thereon computer instructions, wherein said computer instructions when executed perform the steps of the decoding method according to any one of claims 1 to 6.
11. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the decoding method of any one of claims 1 to 6.
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