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WO2020191533A1 - Procédé de détermination d'attribut de ressource de symbole d'ofdm et dispositif associé - Google Patents

Procédé de détermination d'attribut de ressource de symbole d'ofdm et dispositif associé Download PDF

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Publication number
WO2020191533A1
WO2020191533A1 PCT/CN2019/079298 CN2019079298W WO2020191533A1 WO 2020191533 A1 WO2020191533 A1 WO 2020191533A1 CN 2019079298 W CN2019079298 W CN 2019079298W WO 2020191533 A1 WO2020191533 A1 WO 2020191533A1
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WIPO (PCT)
Prior art keywords
symbol
sfi
yth
ofdm symbol
ofdm
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Ceased
Application number
PCT/CN2019/079298
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English (en)
Chinese (zh)
Inventor
罗青全
周武啸
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CN201980091965.7A priority Critical patent/CN113424622B/zh
Priority to PCT/CN2019/079298 priority patent/WO2020191533A1/fr
Publication of WO2020191533A1 publication Critical patent/WO2020191533A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This application relates to the field of communications, and in particular to a method for determining resource attributes of OFDM symbols and related equipment.
  • the 5G new radio In the new radio, NR) system, a slot format indicator (SFI) can be carried through DCI format 2_0, and the SFI can indicate the slot format of the slot.
  • SFI slot format indicator
  • the 5G NR system also defines a complete SFI table. As shown in Table 1, there are a total of 256 SFIs in the table. The first 56 SFIs have been clearly given, and the last 200 SFIs are reserved for subsequent determination.
  • a slot includes 14 (orthogonal frequency division multiplexing, OFDM) symbols, and these 14 OFDM symbols may include downlink symbols for transmitting downlink data, flexible symbols (flexible), and uplink symbols for transmitting uplink data.
  • SFI can indicate the resource attributes of OFDM symbols, and each SFI carries the resource attributes of 14 OFDM symbols. If the user equipment (user device or user equipment, UE) or terminal receives the DCI at the previous moment, it parses out the DCI format according to the DCI as DCI format 2_0, and obtains the SFI carried by the DCI format 2_0, which indicates a certain time slot After receiving the DCI at a later time, the terminal will also obtain another SFI of the time slot.
  • Two DCIs indicate that the SFIs of the same time slot are likely to be different, so one of the DCIs must carry the SFI as a false alarm. If the judgment is wrong, the resource attribute of each OFDM symbol in the time slot is determined according to the wrong SFI. The resource attribute judgment of all or part of the OFDM symbol is wrong. For example, a certain OFDM symbol should be an uplink symbol, but it is judged as a downlink symbol. The terminal should use this OFDM symbol to send data to the base station, but now uses this OFDM symbol to receive downlink data. Obviously, this downlink data is probably the downlink data that the base station prepares to send to other terminals, and it will inevitably affect the data reception of other terminals.
  • the terminal should use this OFDM symbol to receive the uplink data sent by the base station, but now it uses this OFDM symbol to send downlink data to the base station.
  • this downlink data is probably the downlink data that the base station intends to send to the terminal.
  • the terminal cannot complete the scheduling of the downlink shared channel (physical downlink shared channel, PDSCH) channel, which affects the performance of the 5GNR system. No matter which of the above two judgment errors occurs, it will have an impact on the performance of the network system.
  • PDSCH physical downlink shared channel
  • the first aspect of the present application provides a method for determining resource attributes of OFDM symbols, including:
  • the terminal obtains the SFI set of the slot.
  • the SFI set includes at least two SFIs.
  • the two SFIs indicate the slot format of the slot.
  • the slot includes M OFDM symbols, and each SFI can indicate the resource attributes of the M OFDM symbols.
  • the resource attribute specifically indicates whether the OFDM symbol is an uplink symbol, a downlink symbol, or a flexible symbol, the OFDM symbol corresponds to the resource attribute one-to-one, and M is a positive integer greater than 0.
  • Uplink symbols are OFDM symbols used to transmit uplink data
  • downlink symbols are OFDM symbols used to transmit downlink data. Flexible symbols can be used to transmit uplink data as well as downlink data.
  • the Yth OFDM symbol is any OFDM symbol among the M OFDM symbols. If there is at least one SFI indicating the Yth OFDM symbol The resource attribute of the symbol is a downlink symbol, then the Yth OFDM symbol is determined to be a downlink symbol. If no SFI indicates that the resource attribute of the Yth OFDM symbol is a downlink symbol, then it is determined that the Yth OFDM symbol is an OFDM symbol other than the downlink symbol.
  • the embodiments of the present application have the following advantages: Obtain the slot format indicator SFI set of the slot, and the slot format indicator set includes at least two SFIs.
  • the SFI indicates the resource attributes of M OFDM symbols in the slot.
  • the resource attributes correspond one-to-one, and it is determined whether there is at least one SFI in the SFI set indicating that the resource attribute of the Y-th OFDM symbol is a downlink symbol, and the Y-th OFDM symbol is any one of the M OFDM symbols. If so, Then it is directly determined that the Yth OFDM symbol is a downlink symbol.
  • this application determines the Yth OFDM symbol when there is at least one SFI indicating that the Yth OFDM symbol is a downlink symbol
  • the OFDM symbol is a downlink symbol, which can reduce the probability of judgment errors, thereby reducing the impact on the performance of the communication system.
  • it should be an uplink symbol but the judgment is wrong it will affect other terminals and cause network interference, which will have a greater impact on network performance.
  • it should be a downlink symbol but the judgment is wrong it will only affect the terminal itself.
  • the downlink symbol judgment error has less impact on the network performance. Therefore, this application also determines that the Yth OFDM symbol is a downlink symbol when only one SFI indicates that the Yth OFDM symbol is a downlink symbol. To a certain extent, reduce the impact on the performance of the communication system.
  • the method further includes:
  • the Yth OFDM symbol is determined to be an uplink symbol.
  • the resource attribute of the Yth OFDM symbol is first determined to be a flexible symbol.
  • the flexible symbol can be used as an uplink symbol to transmit uplink data or as a
  • the downlink symbol transmits downlink data, so that compared to directly determining the resource attribute of the Yth OFDM symbol as an uplink symbol, the probability of affecting other terminals is reduced to a certain extent.
  • the method further includes:
  • switching the OFDM symbol from the transmission of uplink data to the transmission of downlink data, or switching the OFDM symbol from the transmission of downlink data to the transmission of uplink data will bring power consumption, and the OFDM symbol before the Yth OFDM symbol All are determined as downlink symbols, which means that the first Y OFDM symbols of the M OFDM symbols are used to transmit downlink data, then the first Y OFDM symbols do not need to perform the above-mentioned uplink switching or downlink switching, reducing the terminal to perform uplink switching or downlink switching The number of times, thereby reducing the terminal power consumption.
  • any SFI in the SFI set indicates that the resource attribute of the Y+Nth OFDM symbol is uplink symbol or flexible
  • the method further includes:
  • the Y+Nth OFDM symbol is determined to be a flexible symbol
  • the resource attribute of the Y+Nth OFDM symbol when the resource attribute of the Y+Nth OFDM symbol cannot be determined as a downlink symbol, the resource attribute of the Y+Nth OFDM symbol is first determined as a flexible symbol, and the flexible symbol can be used as an uplink symbol to transmit uplink data. , It can also be used as a downlink symbol to transmit downlink data, so that compared to directly determining the resource attribute of the Y+Nth OFDM symbol as an uplink symbol, the probability of affecting other terminals is reduced to a certain extent.
  • the time slot format indication SFI set of the acquisition time slot includes :
  • the terminal On the PDCCH, the terminal periodically receives the downlink control information DCI sent by the base station, and each time it receives a DCI, determines the SFI carried in the DCI, and periodically receives the DCI, it can be determined to obtain at least one SFI, and at least one SFI belongs to SFI set of time slot.
  • DCI downlink control information
  • a second aspect of the present application provides a terminal, which is characterized in that it includes:
  • a transceiver configured to obtain a slot format indication SFI set of a slot, wherein the SFI set includes at least two SFIs, and the SFI is used to indicate M orthogonal frequency division multiplexing OFDM symbols in the slot
  • the resource attribute of the OFDM symbol corresponds to the resource attribute one-to-one, and the M is a positive integer greater than 0;
  • a processor configured to determine whether at least one SFI in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a downlink symbol, where the Yth OFDM symbol is one of the M OFDM symbols Any OFDM symbol;
  • the processor is configured to, if yes, determine that the Yth OFDM symbol is the downlink symbol.
  • any one of the SFIs in the SFI set indicates that the resource attribute of the Yth OFDM symbol is an uplink symbol or a flexible symbol;
  • the processor is further configured to determine that the Yth OFDM symbol is a flexible symbol if at least one of the SFIs in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a flexible symbol;
  • the processor is further configured to determine that the Yth OFDM symbol is an uplink symbol if all the SFIs in the SFI set indicate that the resource attribute of the Yth OFDM symbol is an uplink symbol.
  • the processor is further configured to determine that all OFDM symbols before the Yth OFDM symbol are downlink symbols.
  • the processor is also used for:
  • the transceiver is specifically used to periodically receive the base station
  • the sent downlink control information DCI determines at least one SFI carried in at least one DCI periodically received, and the at least one SFI belongs to the SFI set of the time slot.
  • the third aspect of the present application provides a terminal, including an acquiring unit, configured to acquire a slot format indication SFI set of a slot, wherein the SFI set includes at least two SFIs, and the SFIs are used to indicate the time Resource attributes of M orthogonal frequency division multiplexing OFDM symbols in the slot, the OFDM symbols correspond to the resource attributes one-to-one, and the M is a positive integer greater than 0;
  • a resource attribute determining unit configured to determine whether at least one SFI in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a downlink symbol, where the Yth OFDM symbol is the M OFDM symbols Any OFDM symbol in;
  • the resource attribute determining unit is configured to, if yes, determine that the Yth OFDM symbol is the downlink symbol.
  • any one of the SFIs in the SFI set indicates that the resource attribute of the Yth OFDM symbol is an uplink symbol or a flexible symbol;
  • the resource attribute determining unit is further configured to determine that the Yth OFDM symbol is a flexible symbol if at least one SFI in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a flexible symbol ;
  • the resource attribute determining unit is further configured to determine that the Yth OFDM symbol is an uplink symbol if all the SFIs in the SFI set indicate that the resource attribute of the Yth OFDM symbol is an uplink symbol .
  • the resource attribute determining unit is further configured to determine that all OFDM symbols before the Yth OFDM symbol are downlink symbols.
  • the resource attribute determining unit is further used for:
  • the terminal further includes a receiving unit, and the receiving unit, Specifically used to periodically receive downlink control information DCI sent by a base station, and determine at least one of the SFIs carried in at least one of the DCIs periodically received, and the at least one SFI belongs to the SFI set of the time slot .
  • a fourth aspect of the present application provides a chip system, wherein the chip system includes at least one processor, a memory, and a transceiver, and the memory, the transceiver, and the at least one processor are interconnected by wires, Instructions are stored in the memory, and the transceiver is configured to perform operations of the receiver in the second aspect and any one of the second aspect thereof; the at least one processor is configured to perform operations such as the second aspect Any one of the second aspect and the second aspect may implement the operation of the processor described in the manner.
  • the fifth aspect of the present application provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any one of the second aspect and any of the second aspects. The method described in the item.
  • the sixth aspect of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute any one of the second aspect and any one of the implementation manners of the second aspect method.
  • FIG. 1 is a schematic diagram of an embodiment of a method for determining resource attributes of OFDM symbols in this application;
  • FIG. 2 is a schematic diagram of another embodiment of a method for determining resource attributes of OFDM symbols in this application;
  • FIG. 3 is a schematic diagram of another embodiment of a method for determining resource attributes of OFDM symbols in this application.
  • Figure 4 is a schematic diagram of the relationship between DCI and SFI of the application.
  • Figure 5 shows the frame structure of the 5GNR system of the application and the correspondence between time slots, OFDM symbols and resource attributes
  • FIG. 6 is a system block diagram of the 5GNR system of this application.
  • Figure 7 is a possible structure of the base station of this application.
  • Figure 8 is a possible structure of the terminal of this application.
  • Fig. 9 is another possible structure of the terminal of the application.
  • the terminal After the terminal is initially powered on, it searches for a cell on the frequency band supported by the terminal, and selects a cell to camp on according to the signal quality of the cell. Then the base station corresponding to the camped cell allocates network resources for the terminal for data transmission.
  • the base station The terminal can be assigned static network resources, that is, fixed and unchanging resources, but with the real-time changes of terminal requirements, the allocation of static network resources obviously cannot meet the needs of the terminal. Therefore, it is necessary to allocate dynamic network resources to the terminal through the DCI format 2_0.
  • the resource may be a time slot resource, and the time slot resource includes an OFDM symbol for transmitting uplink data and/or a downlink OFDM symbol for transmitting downlink data.
  • the resource attribute specifically identifies that a symbol is a downlink symbol used to transmit downlink data, named D, a flexible symbol, named F (flexible), and an uplink symbol used to transmit uplink data, named U,
  • the flexible symbol can be used to transmit uplink data or downlink data.
  • the flexible symbol F can also be called an unknown symbol and named U (unknown). More possible names are not limited here.
  • the terminal receives different DCIs sent by the base station at different times, and each DCI carries the time slot format indicator SFI. If multiple SFIs indicate the same time slot format, the time slot format indicated by multiple SFIs is different. , Then there must be some SFIs that are false alarms, but the terminal does not know which SFIs are false alarms.
  • this application provides a method for determining symbol resource attributes, which can determine symbol resource attributes according to certain principles.
  • the terminal establishes an RRC connection with the base station. After the period arrives, it receives an unlimited resource control (radio resource control, RRC) configuration message sent by the base station.
  • RRC radio resource control
  • the configuration message carries DCI related information.
  • the terminal uses the downlink control channel (physical downlink control channel). , PDCCH) receives the DCI sent by the base station, analyzes the DCI to obtain the DCI format 2_0, and determines the SFI carried in the DCI format 2_0. The above process is executed periodically to obtain the SFI set.
  • a slot has M symbols, and the SFI set includes at least two SFIs.
  • Each SFI indicates the M resource attributes of the M symbols in the slot. It should be noted that the symbols correspond to the resource attributes one to one. Is a positive integer greater than 0.
  • the resource attribute of the Yth symbol is compared to determine whether one or more SFIs indicate that the Yth symbol is a downlink symbol.
  • the Yth symbol is determined to be a downlink symbol, so that the terminal uses the Yth symbol to send downlink data to the base station.
  • the method for determining symbol resource attributes proposed in this application determines that the Yth symbol is a downlink symbol when at least one SFI indicates that the Yth symbol is a downlink symbol Symbols can reduce the probability of judgment errors, thereby reducing the impact on network performance. At the same time, if it should be an uplink symbol but the judgment is wrong, it will affect other terminals and cause network interference, which will have a greater impact on network performance. If it should be a downlink symbol but the judgment is wrong, it will only affect the terminal itself. Compared with uplink symbol judgment errors, downlink symbol judgment errors have less impact on network performance. Therefore, this application prioritizes determining the Yth symbol as a downlink symbol, which can also reduce the impact on network performance to a certain extent.
  • S1 The terminal receives the RRC configuration message sent by the base station.
  • the terminal After establishing an RRC connection with the base station, the terminal receives the RRC configuration message sent by the base station.
  • the RRC configuration message includes information such as the bit length of DCI, how many SFIs the DCI carries, and which cell each SFI indicates. It should be noted that the bit length of DCI is 128 bits at most.
  • the terminal receives the DCI sent by the base station on the PDCCH.
  • the DCI in 5GNR has multiple formats, including Format 0_0, Format 0_1, Format 1_0, Format 1_1, Format 2_0, Format 2_1, Format 2_2, and Format 2_3, including 8 DCI formats.
  • Each DCI format consists of different fields, which are arranged in a specific order.
  • S3 The terminal parses the DCI and obtains that the format of the DCI is DCI format 2_0, thereby determining the SFI carried in the DCI format 2_0.
  • the terminal parses the DCI to determine that the format of the DCI is DCI format 2_0, and checks the DCI format 2_0. After passing the check, it determines the SFI carried in the DCI format 2_0. Whenever the preset period is reached, the base station sends an RRC configuration message to the terminal, and the terminal also needs to detect the DCI again, that is, repeat S1 to S3.
  • the function of DCI format 2_0 is to inform a group of terminals of the time slot format, and the base station can dynamically and periodically schedule the uplink and downlink resource allocation of mobile terminals through DCI format 2_0. If the amount of uplink data is too large, the base station allocates more uplink resources to the terminal through DCI format 2_0, and if the amount of downlink data is too large, the base station allocates more downlink resources to the terminal through DCI format 2_0.
  • the specific DCI format 2_0 can carry one SFI or multiple SFIs. Multiple SFIs can be the same or different. As shown in Figure 4, DCI format 2_0 includes field 1 to field N, and field 1 to field N respectively carry SFI1 to SFIN.
  • One SFI can indicate the time slot format of one time slot, or the time slot format of multiple time slots, that is, the time slot format of multiple time slots is indicated by the same SFI, then the time slot format of multiple time slots is the same
  • the SFI indicates the time slot format of multiple time slots
  • the length of multiple time slots can be referred to as sequence length, and the sequence length is selected between 1 and 256 bits.
  • DCI1 and SFI1 in a certain time slot have a one-to-one correspondence, which means that there is no possibility of another SFI in DCI1 to indicate this time.
  • the slot format of the slot but the SFI of different DCIs can indicate the slot format of the same slot.
  • SFI1 to SFI4 all indicate the time slot format of the same time slot.
  • the SFI specifically includes the resource attributes of each symbol in a time slot, and how many symbols are in a time slot, and how many resource attributes are included in the SFI, so as to indicate what type of data the symbols in the time slot transmit.
  • the 5GNR frame structure shown in Figure 5 includes a fixed architecture and a flexible architecture. In the fixed architecture part, the 5GNR frame structure is the same as LTE. One frame includes 10 subframes, and the length of the radio frame and the subframe is fixed; In the flexible architecture part, the 5G frame structure is different from LTE.
  • the time slot and character length can be flexibly defined according to the subcarrier interval. At the same time, a subframe can include 1 or 2 or 4 time slots, and a time slot can include 7 or 14 symbols.
  • Figure 5 takes a slot including 14 symbols as an example.
  • the symbols are the smallest range in the time domain.
  • the symbols can transmit data.
  • the SFI includes the resource attributes of 14 symbols to indicate the 14 symbols in the slot. Whether it is used to transmit uplink data or downlink data.
  • the terminal receives a DCI every 5s and finds that SFI to SFI4 all indicate the time slot format of the same time slot.
  • the above table shows the resource attribute display results of SFI1 to SFI4. It can be seen that one SFI indicates 14 The resource attributes of the symbols, the 14 symbols are numbered from 0 to 13, each SFI may have different resource attribute indications for the same symbol.
  • each DCI carries SFI. If the SFI carried by these multiple DCIs is used in the same time slot, that is, they are all used to indicate the time slot format of the same time slot, but there are more If the time slot format indicated by each SFI is not the same, there must be a false alarm. If the terminal determines that a symbol is an uplink symbol according to the indication of a certain SFI, the symbol is actually a downlink symbol, which will affect other terminals.
  • this application proposes a method for reducing interference to other users or improving the transmission performance of the communication system, which is specifically as follows:
  • the resource attribute priority determination method is that the downlink symbol priority is higher than the flexible symbol priority, and the flexible symbol The priority is higher than the priority of the uplink symbol to determine the resource attribute of the symbol.
  • all SFIs may belong to the 56 SFIs mentioned above, and only one or more SFIs may belong to the 56 SFIs mentioned above.
  • SFIs that do not violate CELL-Specific or UE-specific in order to reduce the impact on other terminals If there is only one SFI belonging to the above 56 types of SFI, the terminal will directly receive or send data based on this SFI. If there are multiple SFIs belonging to the above preset 56 types of SFI, specifically refer to Figure 2 and perform the following steps:
  • the terminal judges whether there is at least one SFI indicating that the Y-th symbol is a downlink symbol.
  • the terminal determines that the Yth symbol is a downlink symbol.
  • the M OFDM symbols are numbered from 0 to M.
  • the resource attributes of the Yth symbol indicated by multiple SFIs are compared. As long as there is at least one SFI indicating that the Yth symbol is a downlink symbol, then Determine that the Y-th symbol is a downlink symbol.
  • the execution of S4 and S5 is performed according to S4 and S5.
  • the terminal detects an error, that is, the symbol resource attribute should be an uplink symbol, but the terminal judges that it is a downlink symbol. Even if the terminal receives a downlink message, it does not interfere with other terminals. It can reduce the probability of impact on other terminals when a detection error occurs.
  • the resource attribute of the Y-th symbol indicated by any SFI is not a downlink symbol, that is, an uplink symbol or a flexible symbol, S6 and S7 or S8 and S8 are executed.
  • S6 If the judgment of S4 is no, the terminal judges whether there is at least one SFI indicating that the Y-th symbol is a flexible symbol.
  • the terminal determines that the Yth symbol is a flexible symbol.
  • the resource attributes of the Y-th symbol indicated by multiple SFIs are compared, and as long as at least one SFI indicates that the Y-th symbol is a flexible symbol, the Y-th symbol is determined to be a flexible symbol.
  • the resource attribute of the Yth symbol is a downlink symbol.
  • it can be defined as a flexible symbol first. To a certain extent, it can also reduce the probability of affecting other terminals when a detection error occurs.
  • the terminal judges whether all SFIs indicate that the Y-th symbol is an uplink symbol.
  • the resource attributes of the Yth symbol indicated by multiple SFIs are compared, and if all SFIs indicate that the Yth symbol is an uplink symbol, then the Yth symbol is determined to be an uplink symbol.
  • the Y-th symbol is any one of the 14 symbols, and the comparison result of the 14 symbols can be obtained by repeatedly executing S4 to S9.
  • S8 and S9 can be executed before S4 and S5, or can be executed after S4 and S5, and the details are not limited here.
  • S6 and S7 are executed after S4 and S5.
  • the resource attributes of the symbols are determined according to the above method.
  • the resource attributes of the 14 symbols obtained according to the judgment are as follows. For the 0th, 1, 2, 7 and 8th symbols, there is at least one SFI indicating its resource attributes It is a downlink symbol. For the 3rd, 4th, 5th, 9th, and 10th symbols, when it cannot be determined as a downlink symbol, there is at least one SFI indicating that its resource attribute is a flexible symbol. For the 6th, 11th, 12th, and 13th symbols, All SFIs indicate that their resource attributes are uplink symbols. It can be seen that there are two uplink and downlink switching points from D to U in this time slot.
  • the terminal judges whether there is at least one SFI indicating that the Y-th symbol is a downlink symbol.
  • the terminal determines that the Yth symbol is a downlink symbol.
  • the M OFDM symbols are numbered from 0 to M, and the resource attributes of the Yth symbol indicated by multiple SFIs are compared. As long as at least one SFI indicates that the Yth symbol is a downlink symbol, the Yth symbol is determined to be a downlink symbol. symbol.
  • S6 The terminal determines all symbols before the Yth symbol as downlink symbols.
  • S4, S5, and S6 are executed.
  • the terminal detecting an error that is, the symbol resource attribute should be an uplink symbol, but the terminal judges that it is a downlink symbol. Even if the terminal receives a downlink message, it does not interfere with other terminals. , Can reduce the probability of impact on other terminals when the detection error occurs.
  • N can be a positive integer such as 1, 2, 3, 4... or MY.
  • the Y+Nth symbol is the symbol after the Yth symbol. If one or more In SFIs, any SFI indicates that the Y+Nth symbol is an uplink symbol or a flexible symbol, which means that the Yth symbol is the last downlink symbol, and the resource attribute of the Y+Nth symbol is determined as follows:
  • the resource attributes of the Y+Nth symbol indicated by multiple SFIs are compared, and as long as at least one SFI indicates that the Y+Nth symbol is a flexible symbol, the Y+Nth symbol is determined to be a flexible symbol.
  • the resource attributes of the Y+Nth symbol indicated by multiple SFIs are compared. As long as all SFIs indicate that the Y+Nth symbol is an uplink symbol, the Y+Nth symbol is determined to be an uplink symbol.
  • steps S9 and S10 and steps S7 and S8 are executed in no order. They are executed according to steps S7 and S8.
  • at least one SFI indicates that the Yth symbol is a flexible symbol, it can also be defined as a flexible symbol first. Compared with the scheme of determining it as an uplink symbol in steps S9 and S10, to a certain extent, it can also reduce the probability of affecting other terminals when a detection error occurs.
  • the symbols after the Y-th symbol are cyclically executed according to steps S7 to S10 to obtain the resource attributes of all symbols after the Y-th symbol.
  • the resource attributes of the 14 OFDM obtained according to the judgment are as follows.
  • For the 8th symbol there is at least one SFI indicating that its resource attribute is a downlink symbol
  • 8 symbols are the symbols that can be determined as downlink symbols at last, so the 1st to 8th symbols can be determined as downlink symbols.
  • For the 9th and 10th symbols there is at least one SFI indicating that the resource attribute is a flexible symbol.
  • the symbols before the Yth OFDM symbol are determined to be downlink symbols, which means The first Y symbols of the M symbols are used to transmit downlink data, so the first Y symbols do not need to perform the above-mentioned uplink switching or downlink switching.
  • the symbol attribute determination method shown in Figure 3 is relative to the symbol attribute determination shown in Figure 2. There are fewer uplink and downlink switching points, which can reduce the power consumption caused by the terminal's uplink and downlink switching.
  • the communication system of this application can be a 5GNR communication system and a communication system of a new network standard developed subsequently.
  • the structure of the 5GNR communication system is shown in Figure 6, which can include a core network (5GC). ) And access network (NG-RAN).
  • the core network provides the function of the 5G core network for the UE.
  • the core network includes core network control plane network element (AMF) functions and core network user plane function (UPF) functions.
  • AMF is mainly responsible for terminal access and mobility management.
  • UPF is mainly responsible for data packet routing and forwarding, quality of service (Qos) management and other functions.
  • the access network may include network equipment.
  • the network equipment may be a base station, a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, an access point (AP), and other access network equipment, specifically
  • the access network equipment may be a new generation Node B (gNB/gNodeB), a transmission reception point (TRP), an evolved Node B (eNB), and a radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, Home Node) B, HNB), baseband unit (BBU), etc.
  • gNB/gNodeB a new generation Node B
  • TRP transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • a communication connection is established between the base station and the terminal, and the base station can provide wireless access services for the terminal.
  • the base station 70 includes a receiver 701, a transmitter 702, a processor 703, and a memory 704 (the number of processors 703 in the base station 70 can be one or more).
  • One, one processor is taken as an example in Figure 7).
  • the receiver 701, the transmitter 702, the processor 703, and the memory 704 may be connected by a bus or in other ways, wherein the connection by a bus is taken as an example in FIG. 7.
  • the memory can also be integrated with the processor.
  • the memory 704 may include a read-only memory and a random access memory, and provides instructions and data to the processor 703. A part of the memory 704 may also include a non-volatile random access memory (full English name: non-volatile random access memory, English abbreviation: NVRAM).
  • the memory 704 stores an operating system and operating instructions, executable modules or data structures, or a subset of them, or an extended set of them, where the operating instructions may include various operating instructions for implementing various operations.
  • the operating system may include various system programs for implementing various basic services and processing hardware-based tasks.
  • the processor 703 controls the operation of the base station 70, and the processor 703 may also be referred to as a central processing unit (full English name: central processing unit, English abbreviation: CPU).
  • the various components of the base station 70 are coupled together through a bus system.
  • the bus system may also include a power bus, a control bus, and a status signal bus.
  • various buses are referred to as bus systems in the figure.
  • the method disclosed in the above embodiments of the present application may be applied to the processor 703 or implemented by the processor 703.
  • the processor 703 may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 703 or instructions in the form of software.
  • the aforementioned processor 703 may be a general-purpose processor, a digital signal processor (English full name: digital signal processing, English abbreviation: DSP), application specific integrated circuit (English full name: application specific integrated circuit, English abbreviation: ASIC), field programmable Gate array (English full name: field-Programmable gate array, English abbreviation: FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 704, and the processor 703 reads information in the memory 704, and completes the steps of the foregoing method in combination with its hardware.
  • the receiver 701 can be used to receive input digital or character information, and to generate signal input related to the relevant settings and function control of the base station.
  • the transmitter 702 can include display devices such as a display screen.
  • the transmitter 702 can be used to output digital or character information through an external interface. Character information.
  • the processor 703 is configured to execute the foregoing method.
  • an embodiment of the present application also provides a terminal, and the terminal may be a circuit.
  • the terminal can be used to perform the actions performed by the terminal in the foregoing method embodiments.
  • Figure 8 shows a simplified structural diagram of a terminal. It is easy to understand and easy to illustrate.
  • the terminal uses a mobile phone as an example.
  • the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, control the terminal, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminals may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 8. In actual end products, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal, and the processor with the processing function can be regarded as the processing unit of the terminal.
  • the terminal includes a transceiver unit 810 and a processing unit 820.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 810 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 810 can be regarded as the sending unit, that is, the transceiver unit 810 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 810 is configured to perform the sending and receiving operations on the terminal side in the foregoing method embodiment
  • processing unit 820 is configured to perform other operations on the terminal except the transceiving operation in the foregoing method embodiment.
  • the terminal when the terminal is a chip, the chip includes at least one processor, a memory, and a transceiver.
  • the memory stores instructions
  • the memory can also store data
  • the processor is used to process the data.
  • the transceiver is used to perform the operation of the transceiver unit 810 in FIG. 8.
  • the present application also provides a terminal, including:
  • the acquiring unit 901 is configured to acquire a slot format indication SFI set of a slot, wherein the SFI set includes at least two SFIs, and the SFI is used to indicate M orthogonal frequency division multiplexing OFDM in the slot
  • the resource attribute of the symbol, the OFDM symbol has a one-to-one correspondence with the resource attribute, and the M is a positive integer greater than 0;
  • the resource attribute determining unit 902 is configured to determine whether at least one SFI in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a downlink symbol, where the Yth OFDM symbol is the M OFDM symbol Any one of the OFDM symbols in the symbol;
  • the resource attribute determining unit 902 is configured to, if yes, determine that the Yth OFDM symbol is the downlink symbol.
  • any one of the SFIs in the SFI set indicates that the resource attribute of the Yth OFDM symbol is an uplink symbol or a flexible symbol;
  • the resource attribute determining unit 902 is further configured to, if at least one SFI in the SFI set indicates that the resource attribute of the Yth OFDM symbol is a flexible symbol, determine that the Yth OFDM symbol is flexible symbol;
  • the resource attribute determination unit 902 is further configured to determine that the Yth OFDM symbol is an uplink symbol if all the SFIs in the SFI set indicate that the resource attribute of the Yth OFDM symbol is an uplink symbol symbol.
  • the resource attribute determining unit 902 is further configured to determine that all symbols before the Yth OFDM symbol are downlink symbols.
  • the resource attribute determining unit 902 is further configured to:
  • the terminal further includes a receiving unit 903, and the receiving unit 903 is specifically configured to periodically receive downlink control information DCI sent by the base station, and determine at least one of the at least one DCI that is periodically received The SFI, the at least one SFI belongs to the SFI set of the time slot.
  • DCI downlink control information
  • the device embodiments described above are merely illustrative, and the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not The physical unit can be located in one place or distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the connection relationship between the modules indicates that they have a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines.
  • this application can be implemented by means of software plus necessary general hardware. Of course, it can also be implemented by dedicated hardware including dedicated integrated circuits, dedicated CPUs, dedicated memory, Dedicated components and so on to achieve. Under normal circumstances, all functions completed by computer programs can be easily implemented with corresponding hardware. Moreover, the specific hardware structure used to achieve the same function can also be diverse, such as analog circuits, digital circuits or dedicated Circuit etc. Based on this understanding, the technical solution of this application essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a computer floppy disk.
  • U disk mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., including several instructions to make a computer device (which can be A personal computer, server, or network device, etc.) execute the method described in each embodiment of the present application.
  • a computer device which can be A personal computer, server, or network device, etc.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • wired such as coaxial cable, optical fiber, digital subscriber line (DSL)
  • wireless such as infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de détermination de l'attribut de ressource d'un symbole d'OFDM, le procédé étant utilisé dans un ensemble de SFI et lorsqu'au moins un SFI indique que l'attribut de ressource d'un Yème symbole est un symbole de liaison descendante, le Yème symbole est déterminé comme étant le symbole de liaison descendante. Le procédé des modes de réalisation de la présente invention consiste à : acquérir un ensemble d'indicateurs de format de créneau (SFI) d'un créneau, l'ensemble de SFI comprenant au moins deux SFI, les SFI servant à indiquer les attributs de ressources de M symboles de multiplexage par répartition orthogonale de la fréquence (OFDM) dans le créneau, les symboles d'OFDM correspondant aux attributs de ressources sur une base biunivoque et M représentant un nombre entier positif supérieur à zéro ; déterminer s'il existe au moins un SFI, dans l'ensemble de SFI, indiquant que l'attribut de ressource d'un Yème symbole d'OFDM est un symbole de liaison descendante, l'Yème symbole d'OFDM étant un symbole d'OFDM quelconque des M symboles d'OFDM ; et si tel est le cas, déterminer que le Yème symbole d'OFDM est le symbole de liaison descendante.
PCT/CN2019/079298 2019-03-22 2019-03-22 Procédé de détermination d'attribut de ressource de symbole d'ofdm et dispositif associé Ceased WO2020191533A1 (fr)

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CN201980091965.7A CN113424622B (zh) 2019-03-22 2019-03-22 一种ofdm符号的资源属性确定方法及其相关设备
PCT/CN2019/079298 WO2020191533A1 (fr) 2019-03-22 2019-03-22 Procédé de détermination d'attribut de ressource de symbole d'ofdm et dispositif associé

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