PDSCH resource optimization method and device

Abstract

The present invention provides a PDSCH resource optimization method and apparatus. The method comprises calculating the number of symbols occupied by the PDSCH based on the number of symbols currently occupied by the CORESET in the PDCCH; and allocating symbols to the PDSCH based on the number of symbols occupied by the PDSCH. The present invention allocates the remaining unused symbols configured for the PDCCH to the PDSCH, thereby increasing PDSCH resources, improving the amount of data transmitted by the PDSCH, and reducing resource waste.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a PDSCH resource optimization method and device. Background Art

[0002] The 5G (Fifth Generation) communication protocol specifies that the DCI (Downlink Control Information) carried by the PDCCH (Physical Downlink Control Channel) of the UE (User Equipment) SS (Specific Search Space) may be in a variety of formats. These formats include formats 0-0 and 0-1 for uplink DCI indicating PUSCH (Physical Uplink Shared Channel) transmissions, formats 1-0 and 1-1 for downlink DCI indicating PDSCH (Physical Downlink Shared Channel), and formats 2-0, 2-1, 2-2, and 2-3 for use in certain special scenarios.

[0003] Due to the wide bandwidth of 5G NR (New Radio), the UE capability limitation makes PDCCH (Physical Downlink Control Channel) unable to occupy the entire frequency band, so it is divided into multiple CORESETs (Control Resource Sets). Each search space needs to be associated with a CORESET resource. The public search space uses CORESET0, and the UE-specific search space is associated with a dedicated CORESET. Figure 1 As shown, a CORESET includes n CCEs (Control Channel Element). The aggregation level indicates the number of consecutive CCEs occupied by a DCI, which can be 1, 2, 4, 8, or 16. The principle of allocating CCEs is to allocate them in the time domain first and then in the frequency domain.

[0004] The DCI of data services is transmitted using a dedicated CORESET. The number of symbols occupied by the dedicated CORESET is configured in the link establishment and reconfiguration signaling. The number of symbols occupied by the public CORESET is configured through the ControlResourceSetZero field in the signaling sib1. Figure 2As shown, in NR, a time slot has 14 symbols, with symbol indexes from 0 to 13. A CORESET can be configured with 1 to 3 symbols. When calculating the symbols occupied by the PDSCH, the existing technology excludes the symbols configured by the CORESET according to the protocol. The CORESET symbols here refer to the symbols of the public CORESET or the symbols of the dedicated CORESET. There are generally three situations:

[0005] 1. When calculating the symbols occupied by PDSCH, exclude the number of symbols configured by the public CORESET and ensure that the number of symbols configured by the dedicated CORESET is less than or equal to the number of symbols configured by the public CORESET.

[0006] 2. Take the larger of the number of symbols configured by the public CORESET and the number of symbols configured by the dedicated CORESET, and exclude the larger number of symbols when calculating the PDSCH.

[0007] 3. When calculating the number of PDSCH symbols, exclude the number of symbols configured by the currently used CORESET.

[0008] In certain scenarios, such as when transmitting data services, a dedicated CORESET is configured with three symbols under favorable channel conditions. The CCE aggregation level is configured to 1 or adaptively adjusted to 1 based on channel conditions. However, a UE's traffic suddenly increases, filling the entire bandwidth. The required DCI only requires one CCE, occupying only one symbol. The two freed-up symbols are not used for DCI transmission or PDSCH use, resulting in resource waste. When signaling is required, the public CORESET is configured with a larger number of symbols, also resulting in resource waste. Table 1 shows the number of wasted CORESET symbols.

[0009] Table 1 Number of wasted CORESET symbols

[0010]

[0011] Summary of the Invention

[0012] The present invention provides a PDSCH resource optimization method and device, which are used to solve the defect in the prior art that the symbols configured by CORESET are not fully adapted and PDCCH resources are wasted, thereby improving the utilization rate of PDCCH resources.

[0013] The present invention provides a PDSCH resource optimization method, comprising:

[0014] Calculate the number of symbols occupied by PDSCH based on the number of symbols currently occupied by CORESET in PDCCH;

[0015] Symbols are allocated to the PDSCH according to the number of symbols occupied by the PDSCH.

[0016] According to a PDSCH resource optimization method provided by the present invention, the calculation of the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH includes:

[0017] Using the number of symbols currently occupied by the CORESET as the value of the preset field added to the DCI format of the PDSCH;

[0018] The number of symbols occupied by the PDSCH is calculated according to the value of the preset field in the DCI format.

[0019] According to a PDSCH resource optimization method provided by the present invention, before using the number of symbols currently occupied by the CORESET as the value of the preset field added to the DCI format of the PDSCH, the method further includes:

[0020] Determining, according to a scheduling type of downlink scheduling, a CCE aggregation level corresponding to the scheduling type; wherein the scheduling type is pre-associated with the CCE aggregation level;

[0021] The CCEs in the PDCCH are allocated according to the CCE aggregation level to obtain the number of symbols currently occupied by the CORESET.

[0022] According to a PDSCH resource optimization method provided by the present invention, the scheduling type includes data and signaling;

[0023] The signaling includes SIB, MSG2, MSG4, UE capability query and reconfiguration.

[0024] According to a PDSCH resource optimization method provided by the present invention, the method of using the number of symbols currently occupied by the CORESET as the value of a preset field added to the DCI format of the PDSCH includes:

[0025] Determining whether to add the preset field to the DCI format according to an enable switch configured during link establishment or reconfiguration;

[0026] If the preset field exists in the DCI format, the number of symbols currently occupied by the CORESET is used as the value of the preset field added in the DCI format.

[0027] According to a PDSCH resource optimization method provided by the present invention, the DCI format includes a transmission signaling format and a transmission data format;

[0028] The transmission signaling format includes transmission signaling formats with different CRC scrambling.

[0029] The present invention also provides a PDSCH resource optimization device, comprising:

[0030] A calculation module is used to calculate the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH;

[0031] The allocation module is used to allocate symbols to the PDSCH according to the number of symbols occupied by the PDSCH.

[0032] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any of the above-mentioned PDSCH resource optimization methods are implemented.

[0033] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above-mentioned PDSCH resource optimization methods when executed by a processor.

[0034] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any one of the above-mentioned PDSCH resource optimization methods are implemented.

[0035] The PDSCH resource optimization method and device provided by the present invention determine the number of symbols occupied by the PDSCH based on the number of symbols currently actually occupied by the CORESET in the PDCCH, and can allocate the remaining symbols configured but not used by the CORESET to the PDSCH for use, thereby increasing the PDSCH resources, improving the amount of data transmitted by the PDSCH, and reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a diagram showing the relationship between BWP (Band Width Part), CORESET, and CCE provided by the prior art;

[0038] Figure 2 This is a schematic diagram of the NR time slot structure provided by the existing technology;

[0039] Figure 3This is one of the flow charts of the PDSCH resource optimization method provided by the present invention;

[0040] Figure 4 1 is a schematic diagram of the optimized NR time slot structure in the PDSCH resource optimization method provided by the present invention;

[0041] Figure 5 This is the second flow chart of the PDSCH resource optimization method provided by the present invention;

[0042] Figure 6 This is a schematic diagram of the CORESET indicator switch operation process in the PDSCH resource optimization method provided by the present invention;

[0043] Figure 7 It is a structural diagram of the PDSCH resource optimization device provided by the present invention;

[0044] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] The following combination Figure 3 A PDSCH resource optimization method of the present invention is described, comprising: step 301, calculating the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH;

[0047] The number of symbols currently occupied by the CORESET refers to the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols actually occupied by the CORESET in the current scheduling.

[0048] The number of symbols currently occupied by the CORESET is subtracted from the total number of symbols in the current time slot (14) to obtain the number of symbols occupied by the PDSCH. When calculating the number of symbols occupied by the PDSCH, the actual number of symbols occupied by the CORESET used in the current time slot is excluded. The remaining unused symbols configured by the current CORESET are used to transmit the PDSCH.

[0049] Step 302: Allocate symbols to the PDSCH according to the number of symbols occupied by the PDSCH.

[0050] For example, Figure 4 As shown, the PDCCH channel of the current time slot uses one symbol, and the PDSCH can use symbols 1 to 13.

[0051] The dedicated CORESET is configured with a length of 3 symbols during link establishment and reconfiguration. Subtract the number of symbols used by the currently scheduled CORESET from the number of symbols in the currently configured CORESET to obtain a remaining number of 2 symbols. The remaining 2 symbols are allocated to the PDSCH. In the prior art, based on the 3 symbols configured for the CORESET, the PDSCH can only use symbols 3 to 13.

[0052] This embodiment determines the number of symbols occupied by the PDSCH based on the number of symbols currently actually occupied by the CORESET in the PDCCH, and can allocate the remaining unused symbols configured by the CORESET to the PDSCH for use, thereby increasing the PDSCH resources, increasing the amount of data transmitted by the PDSCH, and reducing resource waste.

[0053] Based on the above embodiment, the calculation of the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH in this embodiment includes: using the number of symbols currently occupied by the CORESET as the value of a preset field added to the DCI format of the PDSCH;

[0054] A new preset field CORESET_INDICATOR for the number of symbols currently occupied by CORESET is added to the NR DCI format to indicate the number of symbols currently occupied by CORESET.

[0055] The number of symbols currently occupied by the CORESET is obtained. This embodiment is not limited to a specific acquisition method. The CORESET_INDICATOR field occupies 2 bits and is generally a value of 1, 2, or 3, indicating that the current CORESET occupies 1, 2, or 3 symbols, respectively. Symbols whose CORESET configuration has a greater number of symbols than the value of the CORESET_INDICATOR field are used to transmit PDSCH data.

[0056] The number of symbols occupied by the PDSCH is calculated according to the value of the preset field in the DCI format.

[0057] This embodiment determines the number of symbols occupied by the PDSCH based on the number of symbols currently actually occupied by the CORESET in the PDCCH, and can allocate the remaining unused symbols configured by the CORESET to the PDSCH for use, thereby increasing the PDSCH resources, increasing the amount of data transmitted by the PDSCH, and reducing resource waste.

[0058] Based on the above embodiment, before using the number of symbols currently occupied by the CORESET as the value of the preset field added to the DCI format of the PDSCH in this embodiment, the method further includes: determining, according to a scheduling type of downlink scheduling, a CCE aggregation level corresponding to the scheduling type; wherein the scheduling type is pre-associated with the CCE aggregation level;

[0059] The aggregation level indicates the number of consecutive CCEs occupied by a DCI. The scheduling type is determined during the downlink scheduling process. Different scheduling types have different CCE aggregation levels.

[0060] According to the pre-configured association between the scheduling type and the CCE aggregation level, the CCE aggregation level corresponding to the scheduling type of downlink scheduling is searched.

[0061] The CCEs in the PDCCH are allocated according to the CCE aggregation level to obtain the number of symbols currently occupied by the CORESET.

[0062] The number of consecutive CCEs occupied by a DCI is determined based on the CCE aggregation level. Based on the number of consecutive CCEs occupied by a DCI, appropriate CCEs are selected from the unallocated CCEs, i.e., a sequence consisting of consecutive CCEs equal to the CCE aggregation level is selected. The current number of DCIs scheduled is the CCE sequence number.

[0063] The number of symbols currently occupied by the CORESET can be obtained by multiplying the current scheduled number of DCI by the CCE aggregation degree.

[0064] On the basis of the above embodiment, the scheduling types in this embodiment include data and signaling; the signaling includes SIB, MSG2, MSG4, UE capability query and reconfiguration.

[0065] The aggregation levels used for data and signaling may be different. Different aggregation levels can also be configured for signaling based on the type, so you need to know the scheduling type before determining the aggregation level to use.

[0066] When determining the aggregation level, first determine whether the downlink scheduling type is data or signaling. If it is data, directly obtain the aggregation level corresponding to data; if it is signaling, continue to determine the signaling type and obtain the aggregation level corresponding to the signaling type.

[0067] Based on the above embodiments, in this embodiment, the number of symbols currently occupied by the CORESET is used as the value of the preset field added to the DCI format of the PDSCH, including: determining whether to add the preset field to the DCI format according to an enable switch configured during link establishment or reconfiguration;

[0068] A new enable switch CORESET-Adaption-Enable is added during link establishment or reconfiguration to determine whether the CORESET_INDICATOR field in the DCI format exists.

[0069] If the preset field exists in the DCI format, the number of symbols currently occupied by the CORESET is used as the value of the preset field added in the DCI format.

[0070] When CORESET-Adaption-Enable is 0, the CORESET_INDICATOR field does not exist and the number of bits is 0. This has no effect on the original DCI format and does not affect normal scheduling. When the CORESET-Adaption-Enable field is 1, the CORESET_INDICATOR field occupies 2 bits.

[0071] like Figure 5 As shown, if the enable switch is turned on during link establishment or reconfiguration, CORESET_INDICATOR exists, and a value can be assigned to this field to give the remaining symbols of CORESET to PDSCH for use, and downlink scheduling and resource allocation are performed at this time.

[0072] If the current enabling switch is not turned on, the remaining symbols of CORESET cannot be used. The enabling switch can be turned on by sending the reconfiguration signaling again. Only after it is turned on can the scheduling use the optimization solution in this embodiment.

[0073] like Figure 6 As shown, when the enabling switch is turned on during link establishment, the optimization scheme of this embodiment can be used for downlink scheduling after link establishment. The enabling switch can be turned on or off by sending a reconfiguration message in subsequent scheduling.

[0074] For example, the enable switch added in the link establishment signaling rrcSetup is CORESET-Adaption-Enable, and the enable switch added in the reconfiguration signaling rrcReconfiguration is ENUMERATED{enabled, disabled}.

[0075] CORESET-Adaption-Enable can be configured during link establishment. When this switch is enabled during link establishment, downlink scheduling will adopt the optimized solution in this embodiment, using the remaining CORESET symbols for PDSCH scheduling. If the switch is not enabled during link establishment and this solution is needed later, the switch can be enabled during reconfiguration by sending reconfiguration signaling to the UE. To disable this feature, the switch can be turned off by sending reconfiguration signaling.

[0076] This embodiment determines whether the CORESET indication field in the DCI exists by configuring an enable switch during link establishment or reconfiguration, and can flexibly control whether to use the optimization solution in real time.

[0077] On the basis of the above embodiments, the DCI format described in this embodiment includes a transmission signaling format and a transmission data format; the transmission signaling format includes transmission signaling formats with different CRC scrambling.

[0078] In this embodiment, the DCI format is expressed as a DCI1-X format, including DCI1-0 for transmitting signaling and DCI1-1 for transmitting data.

[0079] DCI1-0 has different CRC scrambling depending on the signaling, and is divided into DCI1-0 scrambled by C-RNTI, CS-RNTI or MCS-C-RNTI, DCI1-0 scrambled by RA-RNTI when transmitting MSG2, DCI1-0 scrambled by TC-RNTI when transmitting MSG4, DCI1-0 scrambled by SI-RNTI when transmitting system message SIB, and DCI1-0 scrambled by P-RNTI when transmitting PAGING.

[0080] After link establishment, C-RNTI DCI1-0, P-RNTI DCI1-0, SI-RNTI DCI1-0, and CRNTI DCI1-1 for data services are used. P-RNTI DCI1-0 has 6 unused reserved bits, and SI-RNTI DCI1-0 has 15 unused reserved bits. Adding the CORESET_INDICATOR field does not change the original DCI length.

[0081] The length of DCI1-1 itself is determined based on the configuration parameters during link establishment and reconfiguration and is relatively long. Under normal circumstances, its length is longer than the length of DCI1-0 after DCI padding, so adding 2 bits has little impact.

[0082] The PDSCH resource optimization device provided by the present invention is described below. The PDSCH resource optimization device described below and the PDSCH resource optimization method described above can be referenced to each other.

[0083] like Figure 7 As shown, the apparatus includes a calculation module 701 and an allocation module 702, wherein:

[0084] The calculation module 701 is used to calculate the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH;

[0085] The allocation module 702 is configured to allocate symbols to the PDSCH according to the number of symbols occupied by the PDSCH.

[0086] This embodiment determines the number of symbols occupied by the PDSCH based on the number of symbols currently actually occupied by the CORESET in the PDCCH, and can allocate the remaining unused symbols configured by the CORESET to the PDSCH for use, thereby increasing the PDSCH resources, increasing the amount of data transmitted by the PDSCH, and reducing resource waste.

[0087] Figure 8 An example of a physical structure diagram of an electronic device is shown below. Figure 8 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call the logic instructions in the memory 830 to execute the PDSCH resource optimization method, which includes: calculating the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH; and allocating symbols to the PDSCH according to the number of symbols occupied by the PDSCH.

[0088] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0089] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the PDSCH resource optimization method provided by the above methods, the method including: calculating the number of symbols occupied by the PDSCH based on the number of symbols currently occupied by the CORESET in the PDCCH; and allocating symbols to the PDSCH based on the number of symbols occupied by the PDSCH.

[0090] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the PDSCH resource optimization method provided by the above methods, the method comprising: calculating the number of symbols occupied by the PDSCH based on the number of symbols currently occupied by the CORESET in the PDCCH; and allocating symbols to the PDSCH based on the number of symbols occupied by the PDSCH.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0092] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A PDSCH resource optimization method, characterized in that: include: Calculate the number of symbols occupied by PDSCH based on the number of symbols currently occupied by CORESET in PDCCH; Allocating symbols to the PDSCH according to the number of symbols occupied by the PDSCH; The calculation of the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH includes: Using the number of symbols currently occupied by the CORESET as the value of the preset field added to the DCI format of the PDSCH; Calculating the number of symbols occupied by the PDSCH according to the value of the preset field in the DCI format; Before using the number of symbols currently occupied by the CORESET as the value of the preset field added to the DCI format of the PDSCH, the method further includes: Determining, according to a scheduling type of downlink scheduling, a CCE aggregation level corresponding to the scheduling type; wherein the scheduling type is pre-associated with the CCE aggregation level; Allocate CCEs in the PDCCH according to the CCE aggregation level to obtain the number of symbols currently occupied by the CORESET; The number of symbols currently occupied by the CORESET in the PDCCH is determined by the following steps: Determining, according to a scheduling type of downlink scheduling, a CCE aggregation level corresponding to the scheduling type; wherein the scheduling type is pre-associated with the CCE aggregation level; The aggregation degree indicates the number of consecutive CCEs occupied by a DCI; Selecting a sequence consisting of consecutive CCEs whose number is equal to the CCE aggregation degree from unallocated CCEs in the number of consecutive CCEs corresponding to the CCE aggregation degree to obtain a CCE sequence number; The number of symbols currently occupied by the CORESET is obtained by multiplying the current number of DCI scheduling by the CCE aggregation degree; The taking the number of symbols currently occupied by the CORESET as the value of a preset field added to the DCI format of the PDSCH includes: Determining whether to add the preset field to the DCI format according to an enable switch configured during link establishment or reconfiguration; If the preset field exists in the DCI format, the number of symbols currently occupied by the CORESET is used as the value of the preset field added in the DCI format.

2. The PDSCH resource optimization method according to claim 1, characterized in that: The scheduling types include data and signaling; The signaling includes SIB, MSG2, MSG4, UE capability query and reconfiguration.

3. The PDSCH resource optimization method according to any one of claims 1-2, characterized in that: The DCI format includes a transmission signaling format and a transmission data format; The transmission signaling format includes transmission signaling formats with different CRC scrambling.

4. A PDSCH resource optimization device, applying the PDSCH resource optimization method according to claim 1, characterized in that: include: A calculation module is used to calculate the number of symbols occupied by the PDSCH according to the number of symbols currently occupied by the CORESET in the PDCCH; The allocation module is used to allocate symbols to the PDSCH according to the number of symbols occupied by the PDSCH.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the PDSCH resource optimization method according to any one of claims 1 to 3 are implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the PDSCH resource optimization method according to any one of claims 1 to 3 are implemented.

7. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the PDSCH resource optimization method according to any one of claims 1 to 3 are implemented.

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