CN113411176A

CN113411176A - PDSCH (physical Downlink shared channel) de-resource mapping method and device, computer readable storage medium and baseband chip

Info

Publication number: CN113411176A
Application number: CN202110714835.3A
Authority: CN
Inventors: 薛丰廷
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-09-17
Anticipated expiration: 2041-06-25
Also published as: CN113411176B

Abstract

A PDSCH de-resource mapping method and device, a computer readable storage medium and a baseband chip are provided, the method comprises the following steps: receiving Physical Downlink Shared Channel (PDSCH) data; determining a mapping position of a first time-frequency resource, wherein the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by various reference signals; and simultaneously performing resource de-mapping on at least part of the reference signals in the multiple reference signals according to the time domain to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one at preset time-domain intervals, wherein the second time-frequency resources are the time-frequency resources actually bearing the PDSCH data in the first time-frequency resources. The scheme of the invention can greatly reduce the processing time delay and the calculation amount of the resource mapping operation.

Description

PDSCH (physical Downlink shared channel) de-resource mapping method and device, computer readable storage medium and baseband chip

Technical Field

The invention relates to the technical field of communication, in particular to a PDSCH (physical Downlink shared channel) de-resource mapping method and device, a computer readable storage medium and a baseband chip.

Background

In order to effectively utilize a communication line, an existing transmitting end may transmit a reference signal together with Physical Downlink Shared Channel (PDSCH) data, that is, the reference signal may be transmitted by multiplexing resources (may be referred to as PDSCH resources) allocated to the PDSCH data. Once resource multiplexing occurs, the receiving end needs to find out the mapping position (resource mapping for short) of the reference signal multiplexing PDSCH resource to determine the mapping position of the time-frequency resource actually carrying PDSCH data in the PDSCH resource. This process may be referred to as Resource Element mapping (also referred to as Demapping, referred to as reddemapping for short), and the receiving end correctly obtains PDSCH data sent by the sending end through the Resource Demapping.

The traditional resource de-mapping operation has the problems of large calculation redundancy and processing time delay.

Disclosure of Invention

The invention solves the technical problem of how to reduce the processing time delay and the calculation amount of the resource de-mapping operation.

To solve the above technical problem, an embodiment of the present invention provides a PDSCH resource de-mapping method, including: receiving Physical Downlink Shared Channel (PDSCH) data; determining a mapping position of a first time-frequency resource, wherein the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by various reference signals; and performing de-resource mapping on at least part of the reference signals in the multiple reference signals in parallel according to the time domain to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one at preset time-domain intervals, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

Optionally, the performing de-resource mapping on at least a part of the reference signals in the multiple reference signals in parallel according to the time domain to obtain mapping positions of the second time-frequency resources on frequency domains corresponding to the preset time intervals one by one in preset time intervals includes: sequentially carrying out resource de-mapping on at least part of the reference signals in the multiple reference signals in parallel on a time domain by taking a preset time domain interval as a unit so as to obtain mapping positions of third time-frequency resources on frequency domains corresponding to the preset time domain intervals one by one, wherein the third time-frequency resources are the time-frequency resources which are multiplexed to the multiple reference signals in the first time-frequency resources; and for each preset time domain interval, carrying out collision detection and judgment on the mapping position of the first time-frequency resource on the frequency domain corresponding to the current preset time domain interval and the mapping position of the third time-frequency resource on the frequency domain corresponding to the current preset time domain interval so as to obtain the mapping position of the second time-frequency resource on the frequency domain corresponding to the current preset time domain interval.

Optionally, the performing, in parallel, resource de-mapping at least some of the multiple reference signals in the time domain sequentially by using the preset time domain interval as a unit includes: and sequentially carrying out resource de-mapping on the multiple reference signals in parallel on the time domain by taking the preset time domain interval as a unit.

Optionally, the reference signal includes any one or more of the following: rate matching resources RMR, control channel resource set CORESET, synchronization information block SSB, channel state information reference signal, and PDSCH demodulation reference signal.

Optionally, the multiple reference signals include a first part of reference signals and a second part of reference signals, where the first part of reference signals includes reference signals that need to perform mapping operation from virtual resources to physical resources, the second part of reference signals includes reference signals that do not need to perform mapping operation from virtual resources to physical resources, and performing de-resource mapping on at least part of the multiple reference signals sequentially in the time domain in parallel by taking a preset time domain interval as a unit includes: and sequentially carrying out resource de-mapping on various reference signals included in the first part of reference signals in parallel on the time domain by taking the preset time domain interval as a unit.

Optionally, the first partial reference signal includes RMR, CORESET, and SSB.

Optionally, the preset time domain interval includes a symbol.

To solve the above technical problem, an embodiment of the present invention further provides a PDSCH resource demapping device, including: a receiving module, configured to receive PDSCH data of a physical downlink shared channel; a determining module, configured to determine a mapping location of a first time-frequency resource, where the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by multiple types of reference signals; and the parallel pipeline processing module is used for simultaneously carrying out de-resource mapping on at least part of the reference signals in the multiple reference signals according to time domains so as to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one in a preset time-domain interval manner, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

To solve the above technical problem, an embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the above method.

In order to solve the above technical problem, an embodiment of the present invention further provides a PDSCH de-resource mapping apparatus, including a memory, a processor, and a buffering unit, where the memory stores a computer program executable on the processor, the processor executes the steps of the method when executing the computer program, and the buffering unit buffers the mapping position of the first time-frequency resource and the parallel processing result of the at least part of reference signals.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a baseband chip, including a processor, where the processor executes the steps of the foregoing method when running a computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a PDSCH (physical Downlink shared channel) de-resource mapping method, which comprises the following steps: receiving Physical Downlink Shared Channel (PDSCH) data; determining a mapping position of a first time-frequency resource, wherein the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by various reference signals; and performing de-resource mapping on at least part of the reference signals in the multiple reference signals in parallel according to the time domain to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one at preset time-domain intervals, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

Compared with the existing solution of mapping the resources by taking the reference signals as the unit, that is, after the mapping of the resources of a certain reference signal is completed, the mapping of the resources of another reference signal is performed. The embodiment adopts the parallel pipelining operation mode to perform de-resource mapping on various reference signals multiplexing PDSCH resources, and can greatly reduce the processing time delay and the calculation amount of the de-resource mapping operation. Specifically, the resource de-mapping is performed in units of preset time domain intervals, and after the resource de-mapping is completed for multiple reference signals in the current preset time domain interval, the resource de-mapping is performed for the multiple references in the next preset time domain interval, so that the mapping positions of the second time frequency resources in the frequency domain corresponding to each preset time domain interval are sequentially obtained in the time domain (i.e., the time domain intervals are preset one by one). Therefore, the problem of calculation redundancy is effectively solved without repeatedly calculating the resource mapping position. Further, when performing de-resource mapping on multiple reference signals in each preset time domain interval, at least part of the de-resource mapping of the reference signals is performed in parallel, which is beneficial to reducing the processing delay.

Further, with the preset time domain interval as a unit, the multiple reference signals are sequentially subjected to parallel de-resource mapping in the time domain. Therefore, the multiple reference signals are subjected to resource de-mapping one by one in a preset time domain interval, and each reference signal is subjected to resource de-mapping in parallel in each preset time domain interval, so that the processing speed is improved.

Drawings

Fig. 1 is a flowchart of a PDSCH resource de-mapping method according to an embodiment of the present invention;

FIG. 2 is a flowchart of one embodiment of step S103 in the embodiment shown in FIG. 1;

FIG. 3 is a logical block diagram of an exemplary application scenario in accordance with an embodiment of the present invention;

FIG. 4 is a flow diagram illustrating resource de-mapping of a single symbol in the application scenario of FIG. 3;

fig. 5 is a schematic structural diagram of a PDSCH resource de-mapping apparatus according to an embodiment of the present invention.

Detailed Description

As known in the background art, the conventional resource de-mapping method has the problems of redundant computation and large processing delay.

In the conventional de-resource mapping method, the time-frequency positions of various reference signals multiplexing the PDSCH resources are de-resource mapped one by one, so that the PDSCH resources multiplexed by the various reference signals are removed one by one. Specifically, after the complete resource mapping of the first reference signal on the time domain and the frequency domain is obtained through resource de-mapping and is removed from the PDSCH resources, the complete resource mapping of the second reference signal on the time domain and the frequency domain is obtained through resource de-mapping and is removed from the PDSCH resources, …, and so on until the complete resource mapping of all the reference signals on the time domain and the frequency domain is obtained through resource de-mapping and is removed from the PDSCH resources.

It can be seen that the conventional resource mapping solution repeatedly calculates the resource mapping positions, which results in redundancy of the calculated amount. Moreover, performing de-resource mapping on various reference signals one by one may cause a large processing delay.

Because the conventional de-resource mapping scheme is mainly used for resource multiplexing in a 2G/3G/4G wireless communication system, reference signals (usually 1 to 2 types) for multiplexing PDSCH resources in such a wireless communication system are generally not many, and thus the defects of the conventional de-resource mapping scheme, such as redundancy in computation amount and large processing delay, are not obvious in the 2G/3G/4G wireless communication system. While The bandwidth of The Fifth Generation mobile communication technology (5G) wireless communication system can reach up to 100 megahertz (MHz), various Reference signals that need to be subjected to Resource de-mapping include Rate Matching Resource (RMR), Synchronization Signal Block (Synchronization Signal/Physical Broadcast Channel Block, SS/PBCH Block, SSB), Control Channel Resource set (Control-Resource set, core), Channel State Information Reference Signal (CSI-RS), Physical Downlink Control Channel (PDCCH), Long Term Evolution (Long Term Evolution, CRS), Physical Shared Channel (PDSCH), DMRS for short) (PDSCH DMRS for short). If the conventional resource de-mapping method is still used, the processing delay at the receiving end is increased sharply, and the situation of the redundancy of the calculated amount becomes very serious.

The embodiment adopts the parallel pipelining operation mode to perform de-resource mapping on various reference signals multiplexing PDSCH resources, and can greatly reduce the processing time delay and the calculation amount of the de-resource mapping operation. Specifically, the resource de-mapping is performed in units of preset time domain intervals, and after the resource de-mapping is completed for multiple reference signals in the current preset time domain interval, the resource de-mapping is performed for the multiple references in the next preset time domain interval, so that the mapping positions of the second time frequency resources in the frequency domain corresponding to each preset time domain interval are sequentially obtained in the time domain (i.e., the time domain intervals are preset one by one). Therefore, the problem of calculation redundancy is effectively solved without repeatedly calculating the resource mapping position. Further, when performing de-resource mapping on multiple reference signals in each preset time domain interval, at least part of the de-resource mapping of the reference signals is performed in parallel, which is beneficial to reducing the processing delay.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a PDSCH resource de-mapping method according to an embodiment of the present invention.

This embodiment may be performed by the user equipment side, such as by a UE on the user equipment side.

The embodiment can be applied to the application scene of multiplexing PDSCH resources by the reference signal under the 5G communication system, and the PDSCH data can be obtained by solving the resource mapping with less calculation amount and shorter processing delay by adopting the embodiment.

In a specific implementation, the PDSCH de-resource mapping method provided in steps S101 to S103 described below may be performed by a baseband chip in the user equipment.

Specifically, referring to fig. 1, the PDSCH resource de-mapping method in this embodiment may include the following steps:

step S101, receiving Physical Downlink Shared Channel (PDSCH) data;

step S102, determining a mapping position of a first time-frequency resource, wherein the first time-frequency resource is used for bearing the PDSCH data and is multiplexed by various reference signals;

step S103, performing de-resource mapping on at least part of the reference signals in the multiple reference signals in parallel according to time domain, so as to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

More specifically, the mapping position of the resource can be understood as the mapping relation of the resource. Such as a mapping relationship between a frequency domain Resource and a Resource Block (RB), or a mapping relationship between a frequency domain Resource and a Resource Element (RE). Also, for example, mapping relationship of time domain resource and symbol (symbol).

Further, the PDSCH data may be carried in first time-frequency resources, that is, time-domain and/or frequency-domain resources (time-frequency resources for short) allocated by the network to the UE for PDSCH transmission. Also, in this implementation, the first time-frequency resource may be multiplexed by multiple reference signals.

Further, the reference signal may be selected from: rate Matching Resources (RMR), control Channel Resource sets (also called control-Resource sets, CORESET), Synchronization Signal BLOCKs (SS/PBCH Block, i.e., SSB), Physical Broadcast Channels (PBCH) and their Demodulation Reference signals (DMRS), and Channel State Information Reference signals (CSI-RS).

In one implementation, step S102 may include: and determining the mapping position of the first time-frequency resource according to Downlink Control Information (DCI). Wherein the DCI is used for indicating a mapping range of the first time-frequency resource in a time domain and a mapping range in a frequency domain.

For example, the process of performing de-resource mapping on the first time-frequency resource carrying the PDSCH data in step S102 may include obtaining a time and frequency pattern (time and frequency pattern) of the PDSCH according to the scheduling of the DCI, where the time and frequency pattern includes a mapping type of the PDSCH in the time domain, a starting symbol of the first time-frequency resource, and an occupied symbol length (symbol length). The mapping position of the first time-frequency resource in the time domain can be converted into an identifier of 14 bits (bit) in 1 slot (slot).

Further, according to the frequency domain information, if the PDSCH mapping type is type 0(type0), 19 bits are used to indicate Resource Block Group (RBG) index (RGB index); if the PDSCH mapping type is type 1(type1), the starting RB (RB start) of the first time/frequency resource is represented by 9 bits, the occupied RB length (RB length) is represented by 9 bits, and the RB bundle size (RB bundle size) is represented by 1 bit. The first time-frequency resource may be mapped to 275 RB bandwidths in the frequency domain according to the parameters of the frequency domain.

In a specific implementation, in step S103, performing de-resource mapping on the multiple reference signals according to the time domain means that after performing de-resource mapping on the multiple reference signals to obtain a mapping position of the second time-frequency resource on a frequency domain corresponding to a current preset time-domain interval, continuing to perform de-resource mapping operation on the multiple reference signals to obtain a mapping position of the second time-frequency resource on a frequency domain corresponding to a next preset time-domain interval.

Further, the de-resource mapping operations for at least two of the plurality of reference signals within a single preset time domain interval are performed in parallel. The parallel execution refers to simultaneous, synchronous and independent execution.

In one implementation, the preset time interval may be a time segment divided in time domain as needed, such as a symbol, a time slot, and the like. In step S103, a de-resource mapping operation is performed on multiple types of reference signals one by one in a preset time interval, and a de-resource mapping operation is performed on at least a part of the reference signals in parallel in each preset time interval.

Specifically, referring to fig. 2, step S103 may include the steps of:

step S1031, sequentially performing de-resource mapping on at least part of the reference signals in the multiple reference signals in parallel in a time domain by taking a preset time domain interval as a unit, so as to obtain mapping positions of third time-frequency resources on frequency domains corresponding to the preset time domain intervals one by one, wherein the third time-frequency resources are the time-frequency resources which are multiplexed to the multiple reference signals in the first time-frequency resources;

step S1032, for each preset time domain interval, performing collision detection and judgment on the mapping position of the first time frequency resource on the frequency domain corresponding to the current preset time domain interval and the mapping position of the third time frequency resource on the frequency domain corresponding to the current preset time domain interval to obtain the mapping position of the second time frequency resource on the frequency domain corresponding to the current preset time domain interval.

For example, in step S1031, the multiple reference signals may be sequentially subjected to de-resource mapping in parallel in the time domain by taking the preset time domain interval as a unit. That is, in each preset time domain interval, all the reference signals are subjected to parallel de-resource mapping, and after the de-resource mapping of each reference signal in the current preset time domain interval is completed, the de-resource mapping of the next preset time domain interval is performed. Therefore, the multiple reference signals are subjected to resource de-mapping one by one in a preset time domain interval, and each reference signal is subjected to resource de-mapping in parallel in each preset time domain interval, so that the processing speed is improved.

For another example, the multiple reference signals may be divided into a first part of reference signals and a second part of reference signals according to whether a mapping operation of virtual resources to physical resources needs to be performed. Wherein the first partial reference signals include reference signals required to perform mapping operations of virtual resources to physical resources, such as RMR, CORESET, and SSB; the second portion of reference signals includes reference signals that are not required to perform a virtual resource to physical resource mapping operation.

Accordingly, in step S1031, the resource de-mapping may be performed on the various reference signals included in the first part of reference signals sequentially in the time domain by taking the preset time domain interval as a unit. That is, in each preset time domain interval, the RMR, the CORESET, and the SSB are subjected to de-resource mapping in parallel, and after the de-resource mapping of the RMR, the CORESET, and the SSB in the current preset time domain interval is completed, the de-resource mapping of the next preset time domain interval is performed. In this example, the second portion of reference signals may be de-resource mapped after/before de-resource mapping the first portion of reference signals.

Further, step S102 and step S1031 may be executed in parallel, and step S1032 performs collision detection and decision on the mapping position of the first time-frequency resource obtained by executing step S102 and the mapping position of the third time-frequency resource obtained by executing step S1031, and finally obtains the mapping position of the second time-frequency resource.

For example, in step S1032, collision detection and decision may be performed one by one at preset time intervals, that is, in each preset time interval, collision detection and decision are performed on the mapping position of the first time-frequency resource on the corresponding frequency domain in the preset time interval and the mapping position of the third time-frequency resource on the corresponding frequency domain in the preset time interval, so as to remove the mapping position on the frequency domain occupied by the third time-frequency resource in the first time-frequency resource, and finally, the remaining mapping position is the mapping position of the second time-frequency resource on the corresponding frequency domain in the preset time interval.

In a specific implementation, the process of performing parallel de-resource mapping on multiple reference signals configured by the network at each preset time domain interval in step S1031 may include the following steps. The network configuration may be indicated by DCI, or may be implemented by other configuration messages.

Taking the resource de-mapping of the CORESET as an example, the CORESET has at most 45 REGs, where each REG corresponds to 6 RBs, so that the mapping position of the CORESET on 275 RBs in the frequency domain can be obtained. The Search space (Search space) corresponds to a symbol position indicating the occupation of CORESET in the time domain. The network configured CORESET and search space mapping parameters (mapping para) may thus include a 45bit RB bitmap and a 3bit RB bitmap offset (offset). Therefore, the mapping position of the CORESET on the frequency domain corresponding to each preset time domain interval can be obtained.

Taking the resource de-mapping of PDSCH DMRS as an example, except for indication by a symbol bitmap (symbol bitmap), the starting position and length of PDSCH DMRS in the frequency domain are the same as those of PDSCH data, but mapping at RE level needs to be indicated by 6 bits (1RB is 12RE, and the upper and lower 6 REs of DMRS are symmetric). The PDSCH DMRS mapping parameters for the network configuration may thus include a 14-bit sign bit map and a 6-bit RE bit map. Thus, PDSCH DMRS mapping positions in the frequency domain corresponding to each preset time interval can be obtained.

Taking the resource de-mapping of the SSB as an example, the SSB mapping parameters configured by the network may indicate the start position (or end position) and length of the SSB in the frequency domain with 18 bits, and indicate the symbol occupied by the SSB in the time domain with 14 bits.

Taking the resource de-mapping of the CSI-RS as an example, the CSI-RS occupies more first time-frequency resources, and the CSI-RS mapping parameter configured by the network may additionally indicate a CSI resource index (resource index) with 32 bits, in addition to indicating the start position (or end position) and length of the CSI-RS in the frequency domain with 18 bits, and indicating the symbol occupied by the CSI-RS in the time domain with 14 bits.

Taking resource de-mapping for the RMR as an example, the RMR has at most 8 groups, so the RMR mapping parameter configured by the network may indicate the index of the resource occupied by the RMR with 8 bits, in addition to indicating the RB occupied by the RMR in the frequency domain with 275 bits and indicating the symbol occupied by the RMR in the time domain with 14 bits.

Further, according to the configuration of the network, the third time-frequency resources of various reference signals can be pipelined in parallel to 275 RB bandwidths according to the symbol unit, so as to obtain mapping positions of the third time-frequency resources of various reference signals at RB level on the frequency domain corresponding to each preset time domain interval.

Then, step S1032 is executed to perform collision check and decision, and finally, mapping positions of the RE-level second time-frequency resource on each preset time-domain interval are generated.

In a typical application scenario, with reference to fig. 3 and fig. 4, after receiving PDSCH data transmitted by a base station, a user equipment implementing the present embodiment performs PDSCH resource de-mapping in a symbol unit pipelined manner.

The user equipment may perform operation s1 to determine a mapping position of the first time frequency resource on the frequency domain corresponding to the current symbol according to the PSDCH time frequency pattern. Specifically, all symbols of the PDSCH may be sequentially traversed, and each symbol calculates a mapping position of the first time-frequency resource on a frequency domain corresponding to the symbol.

In parallel with operation s1, the ue may further perform operation s2 to perform resource de-mapping on PDSCH DMRS according to PDSCH DMRS mapping parameters of the network configuration, so as to obtain PDSCH DMRS a mapping position on the frequency domain corresponding to the current symbol. Specifically, the PDSCH DMRS may be rate matched at the RE level to obtain the mapping location.

In parallel with operations s1 and s2, the user equipment may further perform operation s3 to perform resource de-mapping on the CORESET according to the CORESET mapping parameters configured by the network, so as to obtain a virtual mapping position of the CORESET on the frequency domain corresponding to the current symbol. Specifically, CORESET may be rate matched to obtain virtual mapping locations. Further, operation s31 is performed to determine whether to interleave. If the judgment result of operation s31 is interleaving, operation s32 is performed to map the virtual mapping position of the CORESET on the frequency domain corresponding to the current symbol to the physical mapping position. If the judgment result of the operation s31 is that interleaving is not performed, the virtual mapping position obtained by the operation s3 is the physical mapping position of the CORESET on the frequency domain corresponding to the current symbol, and at this time, operation s33 is performed to perform RB-level rate matching.

In parallel with the foregoing operation, the user equipment may further perform operation s4 to perform resource de-mapping on the SSB according to the SSB mapping parameters configured by the network, so as to obtain a virtual mapping position of the SSB on the frequency domain corresponding to the current symbol. Specifically, the SSBs may be rate matched to obtain virtual mapping locations. Further, operation s41 is performed to determine whether to interleave. If the judgment result of operation s41 is interleaving, operation s42 is performed to map the virtual mapping position of the SSB on the frequency domain corresponding to the current symbol to the physical mapping position. If the judgment result of operation s41 is that interleaving is not performed, the virtual mapping position obtained in operation s4 is the physical mapping position of the SSB in the frequency domain corresponding to the current symbol, and at this time, operation s43 is performed to perform RB-level rate matching.

In parallel with the foregoing operation, the user equipment may further perform operation s5 to perform de-resource mapping on the CSI-RS according to the CSI-RS mapping parameter configured by the network, so as to obtain a mapping position of the CSI-RS on the frequency domain corresponding to the current symbol. In particular, RE-level rate matching may be performed on CSI-RS to obtain the mapping location.

In parallel with the foregoing operation, the user equipment may further perform operation s6 to perform resource de-mapping on the RMR according to the RMR mapping parameter configured by the network, so as to obtain a virtual mapping position of the RMR on the frequency domain corresponding to the current symbol. Specifically, the RMR may be rate matched to obtain a virtual mapping position. Further, operation s61 is performed to determine whether to interleave. If the result of the determination of operation s61 is interleaving, operation s62 is performed to map the virtual mapping position of the RMR on the frequency domain corresponding to the current symbol to the physical mapping position. If the determination result of operation s61 is that interleaving is not performed, the virtual mapping position obtained in operation s6 is the physical mapping position of the RMR in the frequency domain corresponding to the current symbol, and at this time, operation s63 is performed to perform RB-level rate matching.

The execution result of the operations s2, s3, s4, s5, and s6 executed in parallel is the mapping position of the third time-frequency resource on the frequency domain corresponding to the current symbol. By combining the mapping position of the first time-frequency resource on the frequency domain corresponding to the current symbol obtained by performing operation s1, a mapping table (mapping table) on the frequency domain corresponding to the single symbol in fig. 3 can be obtained. The mapping table on the frequency domain corresponding to a single symbol records the RB bitmap of 275 bits corresponding to the current symbol of the first time-frequency resource and the third time-frequency resource.

Due to the resource multiplexing situation, the 275-bit RB bitmap has a situation where the first time-frequency resource and the third time-frequency resource occupy the same RB.

Accordingly, the user equipment performs operation s7 to perform collision detection and decision on the mapping positions of the first time-frequency resource and the third time-frequency resource on the frequency domain corresponding to the current symbol. The decision result is the mapping position of the second time-frequency resource on the current symbol, i.e. RE resource mapping.

For 14 symbols included in 1 slot, the procedure shown in fig. 4 is performed every symbol from the first symbol, so as to perform resource de-mapping on the PDSCH in the frequency domain corresponding to the current symbol. And after the 14 symbols are processed in a flowing mode, a complete PDSCH de-resource mapping result, namely the mapping position of the second time-frequency resource, can be obtained.

In view of the above, the present embodiment adopts a parallel pipelined operation mode to perform de-resource mapping on multiple reference signals multiplexing PDSCH resources, which can greatly reduce processing delay and calculation amount of the de-resource mapping operation. Specifically, the resource de-mapping is performed in units of preset time domain intervals, and after the resource de-mapping is completed for multiple reference signals in the current preset time domain interval, the resource de-mapping is performed for the multiple references in the next preset time domain interval, so that the mapping positions of the second time frequency resources in the frequency domain corresponding to each preset time domain interval are sequentially obtained in the time domain (i.e., the time domain intervals are preset one by one). Therefore, the problem of calculation redundancy is effectively solved without repeatedly calculating the resource mapping position. Further, when performing de-resource mapping on multiple reference signals in each preset time domain interval, at least part of the de-resource mapping of the reference signals is performed in parallel, which is beneficial to reducing the processing delay.

Fig. 5 is a schematic structural diagram of a PDSCH resource de-mapping apparatus according to an embodiment of the present invention. Those skilled in the art understand that the PDSCH de-resource mapping apparatus in this embodiment may be used to implement the method technical solutions described in the embodiments of fig. 1 to fig. 4.

Specifically, referring to fig. 5, the PDSCH de-resource mapping device 5 according to this embodiment may include: a receiving module 51, configured to receive PDSCH data of a physical downlink shared channel; a determining module 52, configured to determine a mapping location of a first time-frequency resource, where the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by multiple types of reference signals; the parallel pipeline processing module 53 is configured to perform resource de-mapping on at least some of the multiple reference signals according to time domains simultaneously, so as to obtain mapping positions of second time-frequency resources on frequency domains corresponding to preset time-domain intervals one by one, where the second time-frequency resources are time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

For more details of the operating principle and the operating mode of the PDSCH resource demapping apparatus 5, reference may be made to the related descriptions in fig. 1 to fig. 4, which are not repeated herein.

In a specific implementation, the PDSCH de-resource mapping device 5 may correspond to a Chip with a de-resource mapping function in the ue, or correspond to a Chip with a data processing function, such as a System-On-a-Chip (SOC), a baseband Chip, and so On; or the chip module group is corresponding to the user equipment and comprises a chip with the resource de-mapping function; or to a chip module having a chip with data processing function, or to a user equipment.

In a specific implementation, each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit.

For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.

An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the PDSCH de-resource mapping method provided in the embodiments corresponding to fig. 1 to fig. 4. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

The embodiment of the present invention further provides another PDSCH de-resource mapping device, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the PDSCH de-resource mapping method provided in the embodiments corresponding to fig. 1 to fig. 4 when running the computer program.

Further, the PDSCH de-resource mapping device includes a buffering unit, where the buffering unit buffers the mapping position of the first time-frequency resource and the parallel processing result of the at least part of reference signals.

Specifically, the capacity of the buffer unit may be designed according to the data amount of the resource de-mapping result of the reference signals that need to be processed in parallel. The mapping positions of the third time-frequency resources of the various reference signals executed in parallel on the frequency domain corresponding to the current symbol may be stored in the buffer unit together. The processor may simultaneously read the mapping positions of the third time-frequency resources of various reference signals stored in the buffer unit in the frequency domain corresponding to the current symbol and the mapping positions of the first time-frequency resources in the frequency domain corresponding to the current symbol, so as to perform collision detection and decision on the mapping positions.

The PDSCH de-resource mapping device may be a user equipment, such as a handset.

An embodiment of the present invention further provides a baseband chip, which includes a processor, and the processor executes the steps of the PDSCH resource de-mapping method provided in the embodiment corresponding to fig. 1 to fig. 4 when running a computer program.

Further, the baseband chip may further comprise a memory, said memory having said computer program stored thereon.

Further, the baseband chip may further include a buffer unit, configured to buffer the mapping position of the first time-frequency resource and a parallel processing result of the at least part of the reference signals.

Alternatively, the memory and the buffer unit may be external devices independent from the baseband chip, and the baseband chip is in communication with the memory and the buffer unit to execute the computer program stored in the memory, and when the computer program is executed to perform the method described in the embodiments of fig. 1 to 4, the buffer unit is accessed to read and/or write the mapping position of the third time-frequency resource of various reference signals on the frequency domain corresponding to the current symbol and the mapping position of the first time-frequency resource on the frequency domain corresponding to the current symbol.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

The technical scheme of the invention can be suitable for 5G (5generation) communication systems, 4G and 3G communication systems, and various communication systems of subsequent evolution, such as 6G, 7G and the like.

The technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, and Vehicle-to-event architecture.

The 5G CN in the embodiment of the present application may also be referred to as a new core (new core), a 5G new core, a Next Generation Core (NGC), or the like. The 5G-CN is set independently of an existing core network, such as an Evolved Packet Core (EPC).

A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a radio access network to provide a wireless communication function. For example, the device providing the base station function in the 2G network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), the device providing the base station function in the 3G network includes a node B (NodeB) and a Radio Network Controller (RNC), the device providing the base station function in the 4G network includes an evolved node B (eNB), the device providing the base station function in the Wireless Local Area Network (WLAN) is an Access Point (AP), the device providing the base station function in the 5G New Radio (New Radio, NR) includes a node B (gnb) that continues to evolve, and the device providing the base station function in a New communication system in the future, and the like.

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 (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), 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 Wireless communication function, a computing device or other processing device 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 are not limited in this embodiment.

In the embodiment of the application, a unidirectional communication link from an access network to a terminal is defined as a downlink, data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called as a downlink direction; the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is referred to as an uplink direction.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

The "plurality" appearing in the embodiments of the present application means two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present application, and do not constitute any limitation to the embodiments of the present application.

The term "connect" in the embodiments of the present application refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, which is not limited in this embodiment of the present application. In the embodiments of the present application, "network" and "system" represent the same concept, and a communication system is a communication network.

It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and 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 non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but 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 above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or 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 computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (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, data center, etc. that contains one or more collections of 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. The semiconductor medium may be a solid state disk.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

1. A method for de-resource mapping of PDSCH is characterized by comprising the following steps:

receiving Physical Downlink Shared Channel (PDSCH) data;

determining a mapping position of a first time-frequency resource, wherein the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by various reference signals;

and performing de-resource mapping on at least part of the reference signals in the multiple reference signals in parallel according to the time domain to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one at preset time-domain intervals, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

2. The method of claim 1, wherein the parallel de-resource mapping of at least some of the plurality of reference signals in time domain to obtain mapping positions of the second time-frequency resource in frequency domain corresponding to each preset time domain interval one by one preset time domain interval comprises:

sequentially carrying out resource de-mapping on at least part of the reference signals in the multiple reference signals in parallel on a time domain by taking a preset time domain interval as a unit so as to obtain mapping positions of third time-frequency resources on frequency domains corresponding to the preset time domain intervals one by one, wherein the third time-frequency resources are the time-frequency resources which are multiplexed to the multiple reference signals in the first time-frequency resources;

and for each preset time domain interval, carrying out collision detection and judgment on the mapping position of the first time-frequency resource on the frequency domain corresponding to the current preset time domain interval and the mapping position of the third time-frequency resource on the frequency domain corresponding to the current preset time domain interval so as to obtain the mapping position of the second time-frequency resource on the frequency domain corresponding to the current preset time domain interval.

3. The method of claim 2, wherein the parallel de-resource mapping at least some of the plurality of reference signals in time domain sequentially in a unit of a preset time domain interval comprises:

and sequentially carrying out resource de-mapping on the multiple reference signals in parallel on the time domain by taking the preset time domain interval as a unit.

4. The method of claim 3, wherein the reference signal comprises any one or more of: rate matching resources RMR, control channel resource set CORESET, synchronization information block SSB, channel state information reference signal, and PDSCH demodulation reference signal.

5. The method according to claim 2, wherein the plurality of reference signals comprise a first part of reference signals and a second part of reference signals, wherein the first part of reference signals comprise reference signals that need to perform mapping operation of virtual resources to physical resources, the second part of reference signals comprise reference signals that do not need to perform mapping operation of virtual resources to physical resources, and the sequentially de-resource-mapping at least some of the plurality of reference signals in parallel in time domain in units of preset time domain intervals comprises:

and sequentially carrying out resource de-mapping on various reference signals included in the first part of reference signals in parallel on the time domain by taking the preset time domain interval as a unit.

6. The method of claim 5, wherein the first partial reference signal comprises RMR, CORESET, and SSB.

7. The method of claim 1, wherein the preset time domain interval comprises a symbol.

8. A PDSCH de-resource mapping apparatus, comprising:

a receiving module, configured to receive PDSCH data of a physical downlink shared channel;

a determining module, configured to determine a mapping location of a first time-frequency resource, where the first time-frequency resource is used for carrying the PDSCH data and is multiplexed by multiple types of reference signals;

and the parallel pipeline processing module is used for simultaneously carrying out de-resource mapping on at least part of the reference signals in the multiple reference signals according to time domains so as to obtain mapping positions of second time-frequency resources on frequency domains corresponding to all preset time-domain intervals one by one in a preset time-domain interval manner, wherein the second time-frequency resources are the time-frequency resources actually carrying the PDSCH data in the first time-frequency resources.

9. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method according to any one of claims 1 to 7.

10. A PDSCH de-resource mapping device comprising a memory, a processor and a buffer unit, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the method according to any of claims 1 to 7, and the buffer unit buffers the mapping locations of the first time-frequency resources and the results of the parallel processing of the at least partial reference signals.

11. A baseband chip comprising a processor, characterized in that the processor, when running a computer program, performs the steps of the method of any one of claims 1 to 7.