Method and system for determining downlink control information in a wireless network

Abstract

Methods and systems for techniques for determining downlink control information in a wireless network are disclosed. In one example aspect, the method includes determining, by a wireless device, a maximum number of downlink control information (DCI) decodable by the wireless device within a time gap of every first number of scheduled cells of a scheduling cell; wherein the DCI is for scheduling downlink (DL) data or uplink (UL) data.

Description

Technical Field

[0001] This patent document generally relates to wireless communication. Background Technology

[0002] Mobile communication technology is propelling the world towards an increasingly interconnected and networked society. The rapid growth of mobile communications and technological advancements have led to greater demands for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectrum efficiency, and latency, are also important for meeting the needs of various communication scenarios. Various technologies are being discussed, including new methods to provide higher quality service, longer battery life, and improved performance. Summary of the Invention

[0003] This patent document specifically describes techniques for determining downlink control information in a wireless network.

[0004] In one aspect, a data communication method is disclosed. The method includes a wireless device determining, within a time interval of a scheduling cell in every first number of scheduled cells, a maximum number of downlink control information (DCI) that the wireless device can decode, wherein the DCI is used to schedule downlink (DL) data or uplink (UL) data.

[0005] In another example aspect, a wireless communication device is disclosed, which includes a processor configured to implement the methods described above.

[0006] In another example, a computer storage medium is disclosed that stores code for implementing the methods described above.

[0007] These and other aspects are described in this document. Attached Figure Description

[0008] Figure 1 A wireless communication system based on some example embodiments of the disclosed technology is shown.

[0009] Figure 2 A block diagram of a portion of a wireless system based on some example embodiments of the disclosed technology is shown.

[0010] Figure 3 An example is shown of determining the maximum number of unicast DCIs that can be decoded by the UE within the set of monitoring opportunities in the time slot of the scheduled cell.

[0011] Figure 4 This illustrates another example of determining the maximum number of unicast DCIs that can be decoded by the UE within the set of monitoring opportunities in a time slot of a scheduled cell.

[0012] Figure 5 An example is shown of determining the maximum number of unicast DCIs that can be decoded by the UE within the set of monitoring opportunities across the span of the scheduling cell.

[0013] Figure 6 This illustrates another example of determining the maximum number of unicast DCIs that can be decoded by the UE within the set of monitoring opportunities across the span of the scheduling cell.

[0014] Figure 7 An example is shown of the maximum number of unicast DCIs that can be decoded by the UE within the set of monitoring opportunities in the sSCell time slot or the PCell span.

[0015] Figure 8 An example is shown where one scheduling cell is determined by configuring each N spans of PCell or sSCell.

[0016] Figure 9 An example is shown of determining the maximum number of unicast DCIs that can be decoded by the UE in the set of monitoring opportunities for each span of the scheduled cell.

[0017] Figure 10 An example is shown of determining the maximum number of unicast DCIs that can be decoded by the UE in the monitoring timing set of every N spans of the scheduled cell.

[0018] Figure 11 Examples of wireless communication processes based on some exemplary embodiments of the disclosed technology are shown. Detailed Implementation

[0019] The section headings used in this document are for ease of understanding only and do not limit the scope of the embodiments to the sections in which they are described. Furthermore, while embodiments are described with reference to 5G examples, the disclosed techniques can be applied to wireless systems using protocols other than 5G or 3GPP protocols.

[0020] For 5G mobile communication technology, the Physical Downlink Control Channel (PDCCH) of a Primary Cell (PCell) or Primary Secondary Cell Group Cell (PSCell) can schedule the Physical Downlink Shared Channel (PDSCH) or Physical Uplink Shared Channel (PUSCH) on a Secondary Cell (SCell). However, the PDCCH of an SCell cannot schedule the PDSCH or PUSCH on a P(S)Cell. Given Dynamic Spectrum Sharing (DSS) in NR Rel-16, the PDCCH resources of a P(S)Cell may be limited. An NR PDCCH enhancement for cross-carrier scheduling is introduced, which includes the PDCCH of the SCell for scheduling the PDSCH or PUSCH on the P(S)Cell to offload the P(S)Cell PDCCH, and therefore the maximum number of unicast DCIs that can be decoded by the UE on two scheduling cells within the same scheduled cell should be determined.

[0021] Figure 1 An example of a wireless communication system 100 in which the technology according to one or more embodiments of the present technology can be applied is shown. The wireless communication system 100 may include one or more base stations (BS) 105a, 105b, one or more wireless devices 110a, 110b, 110c, 110d, and a core network 125. Base stations 105a, 105b may provide wireless services to wireless devices 110a, 110b, 110c, and 110d in one or more wireless sectors. In some embodiments, base stations 105a, 105b include directional antennas that generate two or more directional beams to provide wireless coverage in different sectors.

[0022] Core network 125 can communicate with one or more base stations 105a, 105b. Core network 125 provides connectivity with other wireless communication systems and wired communication systems. Core network may include one or more service subscription databases to store information related to subscribed wireless devices 110a, 110b, 110c, and 110d. First base station 105a can provide wireless services based on a first radio access technology, while second base station 105b can provide wireless services based on a second radio access technology. Depending on the deployment scenario, base stations 105a and 105b can be co-located or installed separately in the field. Wireless devices 110a, 110b, 110c, and 110d can support a variety of different radio access technologies. The technologies and embodiments described in this document can be implemented by base stations of the wireless devices described in this document.

[0023] Figure 2 This is a block diagram representation of a portion of a radio station to which one or more embodiments of the present technology may be applied. The radio device 205, such as a base station or wireless device (or UE), may include processor electronics 210, such as a microprocessor implementing one or more of the wireless technologies presented in this document. The radio device 205 may include transceiver electronics 215 for transmitting and / or receiving wireless signals via one or more communication interfaces, such as antenna 220. The radio device 205 may include other communication interfaces for transmitting and receiving data. The radio device 205 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some embodiments, processor electronics 210 may include at least a portion of transceiver electronics 215. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using the radio device 205. In some embodiments, the radio device 205 may be configured to perform the methods described in this document. The network node described in this application may be implemented using the aforementioned radio station or by using a hardware platform comprising a combination of one or more processors, one or more network interface hardware, and one or more memories for storing processor-executable code or data.

[0024] With the increasing demand for Long-Term Evolution (LTE) and LTE-Advanced (LTE-A) of fourth-generation mobile communication technology (4G) and fifth-generation mobile communication technology (5G) (DSS can reuse spectrum used for 4G for 5G), there is a need for technologies related to the development and enhancement of mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC).

[0025] In current 5G systems, an SCell can be either a scheduling cell or a scheduled cell, while a P(S)Cell can be a scheduling cell but cannot be a scheduled cell. When a P(S)Cell can be both a scheduled cell and a scheduled cell, the maximum number of unicast DCIs that can be decoded by the UE on two scheduling cells within the same scheduled cell should be determined.

[0026] For UE characteristics of downlink (DL) control channels and procedures, there are basic UE characteristics FG (characteristic group) 3-1 and enhanced UE characteristics FG 3-5b. It should be noted that FG 3-1 and FG 3-5b are discussed in this patent document only by way of example and are not intended to be limitations on UE characteristics of downlink (DL) control channels and procedures.

[0027] For FG 3-1, the maximum number of unicast DCIs that the UE can decode for the scheduled cell is as follows: For FDD, one unicast DCI for the scheduled DL and one unicast DCI for the scheduled UL are processed per time slot for each scheduled CC; For TDD, one unicast DCI for the scheduled DL and two unicast DCIs for the scheduled UL are processed per time slot for each scheduled CC.

[0028] For FG 3-5b, the maximum number of unicast DCIs that the UE can decode for a scheduled cell is as follows: For the monitoring time set within the same span; for FDD, in this monitoring time set, one unicast DCI for the scheduled DL and one unicast DCI for the scheduled UL are processed for each scheduled CC; for TDD, in this monitoring time set, one unicast DCI for the scheduled DL and two unicast DCIs for the scheduled UL are processed for each scheduled CC; for TDD, in this monitoring time set, two unicast DCIs for the scheduled DL and one unicast DCI for the scheduled UL are processed for each scheduled CC.

[0029] Because in the current 5G system, SCell can only be a scheduling cell or a scheduled cell, and P(S)Cell can only be a scheduling cell and not a scheduled cell, regardless of whether FG 3-1, FG 3-5b or another FG applies, the function of monitoring PDCCH for a scheduled cell can only be performed by the scheduling cell, and the set of monitoring opportunities within a time slot or span can also be determined by the scheduling cell.

[0030] When a P(S)Cell can be both a scheduled cell and a scheduling cell, the maximum number of unicast DCIs that the UE can decode on both scheduling cells within the same scheduled cell should be determined. Furthermore, the set of monitoring opportunities within a time slot or span on the scheduling cell should also be determined.

[0031] The disclosed techniques can be implemented based on some embodiments to determine the maximum number of unicast DCIs that can be decoded by the UE for a scheduled cell with two scheduled cells, as will be discussed below.

[0032] Example 1

[0033] The disclosed technology can be implemented based on some embodiments to determine the maximum number of unicast DCIs that can be decoded by the UE on two scheduling cells within the same scheduled cell in each time slot of the first scheduling cell, the second scheduling cell, the scheduling cell with a higher SCS, or the scheduling cell with a lower SCS.

[0034] In a carrier aggregation scenario, the configuration of a P(S)Cell (referred to as "Cell A") can be scheduled by an SCell (referred to as "Cell B"), and Cell A can also support a self-scheduling scheme. For Cell B, Cell B is configured as the scheduling cell and supports scheduling Cell A. Cell A (the scheduled cell) then has two scheduling cells: Cell A (the first scheduling cell) and Cell B (the second scheduling cell). The maximum number of unicast DCIs that can be decoded by the UE on both scheduling cells within the same scheduled cell A should be determined.

[0035] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0036] For a scheduled cell A with two scheduled cells, the maximum number of unicast DCIs that can be decoded by the UE is determined from the monitoring opportunity set within the time slots of the first scheduled cell (cell A with SCS = μ1), the second scheduled cell (cell B with SCS = μ2), the scheduled cell with a higher SCS, or the scheduled cell with a lower SCS. Optionally, the maximum number of unicast DCIs can be: for Frequency Division Duplex (FDD), one unicast DCI for the scheduled DL and one unicast DCI for the scheduled UL; for Time Division Duplex (TDD), one unicast DCI for the scheduled DL and two unicast DCIs for the scheduled UL; for TDD, two unicast DCIs for the scheduled DL and one unicast DCI for the scheduled UL.

[0037] In some embodiments, FDD can be used as an example, and the maximum number of unicast DCIs that can be decoded by the UE can be determined in the set of monitoring opportunities within the time slot of the first scheduling cell (cell A with SCS = μ1). Figure 3 In this context, the maximum number of unicast DCIs that a UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for the DL and one unicast DCI for the UL within the monitoring timing set in the time slot of the first scheduling cell (PCell with μ = 0). One unicast DCI for the DL and one unicast DCI for the UL are processed in each 1ms time slot of the first scheduling cell or each scheduled cell in both scheduling cells. Figure 4 In this context, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL in the monitoring timing set within the time slot of the first scheduling cell (PCell with μ=1). One unicast DCI for DL ​​and one unicast DCI for UL are processed on the two scheduling cells in the first scheduling cell or every 0.5ms time slot of each scheduled cell.

[0038] Similarly, within the monitoring opportunity set of the second scheduling cell (cell B with SCS = μ2), the scheduling cell with a higher SCS, or the scheduling cell with a lower SCS, the maximum number of unicast DCIs that can be decoded by the UE is determined. In one embodiment, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the monitoring opportunity set of the scheduling cell with a lower SCS within its time slot. Figure 3In this context, the maximum number of unicast DCIs that a UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL within the monitoring timing set of the first scheduling cell (PCell) with a lower SCS. This is processed on both scheduling cells in the first scheduling cell or each 1ms time slot of the two scheduling cells. Figure 4 In this context, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL in the monitoring timing set within the time slot of the scheduling cell (sSCell) with the lower SCS. In the second scheduling cell, one unicast DCI for DL ​​and one unicast DCI for UL are processed on the two scheduling cells in every 1ms time slot.

[0039] Although FDD is used as an example in some embodiments discussed in this patent document, the same principles apply to TDD. Similarly, although PCell is used as an example in some embodiments discussed in this patent document, the same principles apply to PSCell.

[0040] In other embodiments, for a scheduled cell A with two scheduling cells, the maximum number of unicast DCIs that can be decoded by the UE can be determined based on the set of monitoring opportunities in the time slots of the first scheduling cell (cell A with SCS = μ1), and the maximum number of unicast DCIs that can be decoded by the UE can be determined based on the set of monitoring opportunities in the time slots of the second scheduling cell (cell B with SCS = μ2). Optionally, for each scheduling cell of the scheduled cell, the maximum number of unicast DCIs can be: for FDD, one unicast DCI for scheduling DL and one unicast DCI for scheduling UL; for TDD, one unicast DCI for scheduling DL and two unicast DCIs for scheduling UL; for TDD, two unicast DCIs for scheduling DL and one unicast DCI for scheduling UL.

[0041] In some embodiments, the maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduling cells is determined based on the set of monitoring opportunities within the time slot of one of the scheduling cells. This ensures that the maximum number of unicast DCIs that can be decoded by the UE for a scheduled cell with two scheduling cells is explicitly determined when the SCell schedules the PCell. This avoids the potential problem of PDCCH omission detection, which would otherwise occur when the maximum number of unicast DCIs that can be decoded by the UE on the UE side differs from the maximum number on the gNB side.

[0042] Example 2

[0043] The disclosed technology can be implemented based on several embodiments to determine, according to at least one of the following, the maximum number of unicast DCIs that a UE can decode on two scheduling cells within the same scheduled cell in each span of a scheduling cell: cell priority, span number priority, and combination (X, Y) priority. Optionally, both scheduling cells have span-based surveillance features (i.e., FG3-5b) and the same SCS.

[0044] Here, X indicates the number of symbols corresponding to the minimum gap between the starting symbols of two consecutive spans, and Y indicates the maximum number of consecutive symbols in each span. In some implementations, the UE reports a combination of (X, Y). Example values ​​for the combination (X, Y) may include (7, 3), (4, 3), and (2, 2). There is a minimum time interval of X OFDM symbols between the starting symbols of two spans, where the length of each span reaches Y consecutive OFDM symbols of a time slot. In one example, the spans do not overlap, and each span is contained in a single time slot.

[0045] In carrier aggregation scenarios, the configuration of P(S)Cell (referred to as "Cell A") can be scheduled by SCell (referred to as "Cell B"), and Cell A can also support self-scheduling schemes. For Cell B, Cell B is configured as the scheduling cell and supports scheduling Cell A. Then Cell A has two scheduling cells, namely Cell A (first scheduling cell) and Cell B (second scheduling cell). The maximum number of unicast DCIs that can be decoded by the UE on both scheduling cells of the same scheduled cell A should be determined.

[0046] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0047] For a scheduled cell A with two scheduled cells, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within the span of one of the scheduled cells. One of the scheduled cells is determined based on at least one of the following: cell priority, span number priority, and combination (X, Y) priority. Optionally, the maximum number of unicast DCIs can be: for FDD, one unicast DCI for the scheduled DL and one unicast DCI for the scheduled UL; for TDD, one unicast DCI for the scheduled DL and two unicast DCIs for the scheduled UL; and for TDD, two unicast DCIs for the scheduled DL and one unicast DCI for the scheduled UL.

[0048] Method 1: In step 1, a scheduling cell is selected based on the priority of the combination (X, Y). In step 2, if the combinations (X, Y) are the same, a scheduling cell is selected based on the priority of the span number. In step 3, if the combinations (X, Y) are the same and the span number is the same, a scheduling cell is selected based on the cell priority. In other embodiments, one or more of the operations discussed above may be optional, and the order of the above steps may vary. For example, in step 1, a scheduling cell is selected based on the priority of the span number. In step 2, if the span number is the same, a scheduling cell is selected based on the priority of the combination (X, Y). In step 3, if the combinations (X, Y) are the same and the span number is the same, a scheduling cell is selected based on the cell priority. For example, in step 1, a scheduling cell is selected based on the priority of the span number. In step 2, if the span number is the same, a scheduling cell is selected based on the cell priority. For example, in step 1, one of the scheduled cells is selected based on the priority of the combination (X, Y). In step 2, if the combinations (X, Y) are the same, then one of the scheduled cells is selected based on the cell priority. For example, one of the scheduled cells is selected based on the priority of the span. For example, one of the scheduled cells is selected based on the priority of the combination (X, Y). For example, one of the scheduled cells is selected based on the priority of the cell.

[0049] Method 2: One of the scheduling cells is selected based on cell priority.

[0050] Method 3: When all UE-Specific Search Spaces (USS) used for scheduling the PCell are on sSCell, select sSCell as one of the scheduling cells. When the USS used for scheduling the PCell is on both the PCell and sSCell, Method 1 or 2 can be used. Here, sSCell can be an SCell configured to schedule the PCell.

[0051] Combination (X, Y) priority: Alternative 1 is determined based on the set of monitoring opportunities within the span of cells with smaller X values. Alternative 2 is determined based on the set of monitoring opportunities within the span of cells with larger X values. Note: For cells, when multiple (X, Y) are reported, the X above is the X used to determine the span of the cell.

[0052] Span priority: Alternative option 1 is determined based on the set of monitoring opportunities within the cell's span, indicating that the cell has a large span within a time slot. Alternative option 2 is determined based on the set of monitoring opportunities within the cell's span, indicating that the cell has a small span within a time slot.

[0053] Cell priority: Alternative option 1 is determined based on the set of monitoring opportunities within the span of PCell (first scheduling cell). Alternative option 2 is determined based on the set of monitoring opportunities within the span of sSCell (second scheduling cell).

[0054] In the embodiment using FDD as an example, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of a scheduling cell in method 1. Figure 5 In Method 1, the first check based on the priority of the combination (X, Y) of Alternative Scheme 1 is determined according to the set of monitoring opportunities within the span of the cell with the smaller X value, and the two scheduled cells have the same combination (X, Y) = (2, 2). Then, the check based on the span priority of Alternative Scheme 1 is determined according to the set of monitoring opportunities within the span of the cell, which has more spans in a time slot, and the first scheduled cell (PCell) is selected because it has more spans than the second scheduled cell (sSCell). The maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduled cells is one unicast DCI for DL ​​and one unicast DCI for UL within the set of monitoring opportunities within the span of the first scheduled cell (PCell), and one unicast DCI for DL ​​and one unicast DCI for UL are processed on the two scheduled cells in each span of the first scheduled cell. Figure 6 In Method 1, the first check based on the priority of the combination (X, Y) of Alternative Scheme 2 is determined according to the set of monitoring opportunities within the span of the cell with the larger X value. Then, the second scheduling cell with combination (X, Y) = (4, 3) is selected. Then, the maximum number of unicast DCIs that can be decoded by the UE for the scheduled PCell with two scheduling cells is one unicast DCI for scheduling DL and one unicast DCI for scheduling UL in the set of monitoring opportunities within the span of the second scheduling cell (sCell). One unicast DCI for scheduling DL and one unicast DCI for scheduling UL are processed on the two scheduling cells in each span of the second scheduling cell.

[0055] Similarly, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of a scheduling cell in the scheduling cell, according to method 2. In one embodiment, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of a scheduling cell in the scheduling cell, according to cell priority. Figure 5 In method 2, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduled cells is determined by scheduling one unicast DCI for the DL and one unicast DCI for the UL within the monitoring opportunity set across the span of one of the scheduled cells, based on cell priority. Alternative 1, determined based on the monitoring opportunity set within the span of the PCell, processes one unicast DCI for the DL and one unicast DCI for the UL across the two scheduled cells in each span of the first scheduled cell (PCell). Figure 6 In Method 2, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduling cells is determined by scheduling one unicast DCI for the DL and one unicast DCI for the UL within the monitoring opportunity set of one scheduling cell span in the second scheduling cell (sSCell) based on cell priority. Alternative Method 2, determined based on the monitoring opportunity set within the span of the sSCell, processes one unicast DCI for the DL and one unicast DCI for the UL on both scheduling cells in each span of the second scheduling cell (sSCell).

[0056] Although FDD is used as an example in some embodiments discussed in this patent document, the same principles apply to TDD. Similarly, although PCell is used as an example in some embodiments discussed in this patent document, the same principles apply to PSCell.

[0057] In other embodiments, for a scheduled cell A with two scheduling cells, the maximum number of unicast DCIs that can be decoded by the UE can be determined based on the set of monitoring opportunities within the span of the first scheduling cell (cell A with SCS = μ1), and the maximum number of unicast DCIs that can be decoded by the UE can be determined based on the set of monitoring opportunities within the span of the second scheduling cell (cell B with SCS = μ2). Optionally, for each scheduling cell of the scheduled cell, the maximum number of unicast DCIs can be: for FDD, one unicast DCI for scheduling DL and one unicast DCI for scheduling UL; for TDD, one unicast DCI for scheduling DL and two unicast DCIs for scheduling UL; for TDD, two unicast DCIs for scheduling DL and one unicast DCI for scheduling UL.

[0058] In some embodiments, the maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduling cells is determined based on the set of monitoring opportunities within the time slot of one of the scheduling cells. This ensures that the maximum number of unicast DCIs that can be decoded by the UE for a scheduled cell with two scheduling cells is explicitly determined when the SCell schedules the PCell. This avoids the potential problem of PDCCH omission detection, which would otherwise occur when the maximum number of unicast DCIs that can be decoded by the UE on the UE side differs from the maximum number on the gNB side.

[0059] Example 3

[0060] The disclosed technology can be implemented based on several embodiments to determine, in each span of a scheduling cell within a scheduling cell, the maximum number of unicast DCIs that a UE can decode on two scheduling cells within the same scheduled cell, based on at least one of the following: the SCS relationship between the two scheduling cells, every N spans, and cell priority. Optionally, both scheduling cells have span-based surveillance features (i.e., FG3-5b) and have different SCSs.

[0061] In carrier aggregation scenarios, the configuration of P(S)Cell (referred to as "Cell A") can be scheduled by SCell (referred to as "Cell B"), and Cell A can also support self-scheduling schemes. For Cell B, Cell B is configured as the scheduling cell and supports scheduling Cell A. Then Cell A has two scheduling cells, namely Cell A (first scheduling cell) and Cell B (second scheduling cell). The maximum number of unicast DCIs that can be decoded by the UE on both scheduling cells of the same scheduled cell A should be determined.

[0062] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0063] For a scheduled cell A with two scheduled cells, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of one of the scheduled cells. One of the scheduled cells is determined based on at least one of the following: the SCS relationship between the two scheduled cells, every N spans, and cell priority. Optionally, the maximum number of unicast DCIs can be: for FDD, one unicast DCI for the scheduled DL and one unicast DCI for the scheduled UL; for TDD, one unicast DCI for the scheduled DL and two unicast DCIs for the scheduled UL; and for TDD, two unicast DCIs for the scheduled DL and one unicast DCI for the scheduled UL.

[0064] Method 1: The scheduling cell in a scheduling cell is determined based on the SCS size relationship between the first scheduling cell (PCell) and the second scheduling cell (sSCell). When the SCS of sSCell is smaller than the SCS of PCell (smaller SCS scheduling larger SCS), the span in a scheduling cell within a scheduling cell is sSCell. When the SCS of sSCell is larger than the SCS of PCell (larger SCS scheduling smaller SCS), then Alternative Scheme 1 is used: the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within the time slot of sSCell, or Alternative Scheme 2 is used: the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within the span of PCell.

[0065] Method 2: One scheduling cell in a scheduling cell is determined by configuring every N spans of either the first scheduling cell (PCell) or the second scheduling cell (sSCell). Optionally, one scheduling cell in a scheduling cell is determined by configuring every N spans of sSCell or every span of the PCell. For example, when the SCS of sSCell is less than the SCS of PCell (smaller SCS scheduling larger SCS), one scheduling cell in a scheduling cell is determined by configuring every N=1 spans of sSCell; when the SCS of sSCell is greater than the SCS of PCell (larger SCS scheduling smaller SCS), one scheduling cell in a scheduling cell is determined by configuring every N=2 sSCells.

[0066] Method 3: One of the scheduled cells is selected based on cell priority. Alternative 1 is determined based on the set of monitoring opportunities within the span of the PCell. Alternative 2 is determined based on the set of monitoring opportunities within the span of the sSCell. Alternative 3 is determined based on the set of monitoring opportunities within the span of cells with larger SCS. Alternative 4 is determined based on the set of monitoring opportunities within the span of cells with smaller SCS.

[0067] Method 4: When all USS used for scheduling the PCell are on the sSCell, select the sSCell as one of the scheduling cells. When the USS used for scheduling the PCell is on both the PCell and the sSCell, use method 1, 2, or 3.

[0068] In the embodiment using FDD as an example, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of a scheduling cell in method 1. Figure 7In Method 1, the SCS of the sSCell is greater than the SCS of the PCell (larger SCS schedules smaller SCS), and using Alternative Scheme 1, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the monitoring opportunity set within the sSCell's time slot. Then, the maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduling cells is one unicast DCI scheduled for DL ​​and one unicast DCI scheduled for UL within the monitoring opportunity set within the sSCell's time slot. The one unicast DCI scheduled for DL ​​and one unicast DCI scheduled for UL are processed on both scheduling cells in each time slot of the second scheduling cell. Alternatively, using Method 1 and Alternative Scheme 2, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the monitoring opportunity set within the span of the PCell. Then, the maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL in the monitoring timing set within the span of the first scheduling cell (PCell), and one unicast DCI for DL ​​and one unicast DCI for UL are processed on the two scheduling cells in each span of the first scheduling cell.

[0069] In the embodiment using FDD as an example, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within a span of a scheduling cell in method 2. Figure 8 In method 2, one of the scheduling cells is determined by configuring every N=2 spans of the second scheduling cell (sSCell). Then, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL within the monitoring opportunity set within N=2 spans of the sSCell, and the unicast DCI for DL ​​and UL is processed on the two scheduling cells within each N=2 span of the second scheduling cell. Alternatively, method 2 can be used to determine one of the scheduling cells by configuring every N=1 spans of the first scheduling cell (PCell). Then, the maximum number of unicast DCIs that the UE can decode for a scheduled PCell with two scheduling cells is one unicast DCI for DL ​​and one unicast DCI for UL within the monitoring opportunity set within the span of the first scheduling cell, and the unicast DCI for DL ​​and UL is processed on the two scheduling cells within each span of the first scheduling cell.

[0070] Although FDD is used as an example in some embodiments discussed in this patent document, the same principles apply to TDD. Similarly, although PCell is used as an example in some embodiments discussed in this patent document, the same principles apply to PSCell.

[0071] In other embodiments, for a scheduled cell A with two scheduling cells, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within the span of the first scheduling cell (cell A with SCS = μ1), and the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities within the span of the second scheduling cell (cell B with SCS = μ2). Optionally, for each scheduling cell of the scheduled cell, the maximum number of unicast DCIs may be: for FDD, one unicast DCI for scheduling DL and one unicast DCI for scheduling UL; for TDD, one unicast DCI for scheduling DL and two unicast DCIs for scheduling UL; for TDD, two unicast DCIs for scheduling DL and one unicast DCI for scheduling UL.

[0072] In some embodiments, the maximum number of unicast DCIs that can be decoded by the UE for a scheduled PCell with two scheduling cells is determined based on the set of monitoring opportunities within the time slot of one of the scheduling cells. This ensures that the maximum number of unicast DCIs that can be decoded by the UE for a scheduled cell with two scheduling cells is explicitly determined when the SCell schedules the PCell. This avoids the potential problem of PDCCH omission detection, which would otherwise occur when the maximum number of unicast DCIs that can be decoded by the UE on the UE side differs from the maximum number on the gNB side.

[0073] Example 4

[0074] The disclosed technology can be implemented based on several embodiments to determine the maximum number of unicast DCIs that can be decoded by the UE for the scheduled cell in each span of the scheduling cell according to at least one of the following: the SCS relationship between the scheduling cell and the scheduled cell, and every N spans. Optionally, both the scheduling cell and the scheduled cell have span-based surveillance features (i.e., FG3-5b) and have different SCSs.

[0075] In carrier aggregation scenarios, cell A is configured to support a self-scheduling scheme. For cell B, cell B's configuration is scheduled by cell A. The maximum number of unicast DCIs that the UE can decode for the scheduled cell B should be determined.

[0076] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0077] For scheduled cell B, the maximum number of unicast DCIs that can be decoded by the UE for the scheduled cell in each span of the scheduling cell is determined based on at least one of the following: the SCS relationship between the scheduling cell and the scheduled cell, and every N spans. Optionally, the maximum number of unicast DCIs is: for FDD, one unicast DCI for the scheduling DL and one unicast DCI for the scheduling UL; for TDD, one unicast DCI for the scheduling DL and two unicast DCIs for the scheduling UL; for TDD, two unicast DCIs for the scheduling DL and one unicast DCI for the scheduling UL.

[0078] Method 1: Determine each span or time slot of the scheduling cell based on the SCS size relationship between the scheduling cell and the scheduled cell. When the SCS of the scheduling cell is smaller than that of the scheduled cell (smaller SCS scheduling larger SCS), use each span of the scheduling cell. When the SCS of the scheduling cell is larger than that of the scheduled cell, use each span of the scheduling cell.

[0079] Method 2: Determine every N spans of the scheduling cell.

[0080] In embodiments using FDD as an example of method 2, the maximum number of unicast DCIs that can be decoded by the UE is determined based on the set of monitoring opportunities per N spans in the scheduled cell. For example, in Figure 9 In this context, when the SCS of the scheduling cell is smaller than that of the scheduled cell (smaller SCS scheduling larger SCS), one of the scheduling cells is determined by configuring every N=1 span of the scheduling cell. Then, the maximum number of unicast DCIs that the UE can decode for the scheduled cell can be: one unicast DCI for the DL and one unicast DCI for the UL within the monitoring timing set within the span of the scheduling cell. Figure 10 In this context, when the SCS of the scheduling cell is greater than that of the scheduled cell, one of the scheduling cells is determined by configuring every N=2 spans of the scheduling cell. Then, the maximum number of unicast DCIs that the UE can decode for the scheduled cell can be: one unicast DCI for the scheduling DL and one unicast DCI for the scheduling UL in every N=2 spans of the monitoring time set of the scheduling cell.

[0081] Example 5

[0082] In carrier aggregation scenarios, the configuration of a P(S)Cell (referred to as "Cell A") can be scheduled by an SCell (referred to as "Cell B"), and Cell A can also support a self-scheduling scheme. For Cell B, if Cell B is configured as the scheduling cell and supports scheduling Cell A, then Cell A has two scheduling cells: Cell A (the first scheduling cell) and Cell B (the second scheduling cell). The timing of the PDSCH / PUSCH processing on the scheduled cell A with two scheduling cells should be determined.

[0083] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0084] For the PDSCH processing time, N1 is based on μ in Tables 1 and 2 below, which are for UE processing capabilities 1 and 2 respectively, where μ corresponds to the time required to generate the maximum T. proc,1 of (μ) PDCCH μ PDSCH μ UL One of them, where μ PDCCH The subcarrier spacing corresponding to the PDCCH that schedules the PDSCH, μ PDSCH The subcarrier spacing corresponding to the scheduled PDSCH, and μ UL The subcarrier spacing of the uplink channel to which HARQ-ACK will be transmitted.

[0085] If the first uplink symbol of the PUCCH carrying HARQ-ACK information (as defined by the allocated HARQ-ACK timing K1 and the PUCCH resources to be used, and including the effects of timing advance) does not begin earlier than the start of symbol L1, where L1 is defined as the next uplink symbol whose CP is acknowledged after the end of the last symbol of the PDSCH carrying TB is confirmed, then... proc,1 =(N1+d 1,1 (2048+144)·κ2 -μ ·T C Then, the UE will provide a valid HARQ-ACK message.

[0086] N1 is based on μ in Tables 1 and 2 for UE processing capabilities 1 and 2 respectively, where μ corresponds to the value that generates the maximum T. proc,1 of (μ) PDCCH μ PDSCH μ UL One of them, where μ PDCCH The subcarrier spacing corresponding to the PDCCH that schedules the PDSCH, μ PDSCH The subcarrier spacing corresponding to the scheduled PDSCH, and μ ULThe subcarrier spacing of the uplink channel to which HARQ-ACK will be transmitted corresponds to, and κ = T s / T c =64, where T s =1 / (Δf) ref ·N f,ref ), Δf ref =15·10 3 Hz and N f,ref =2048, T c =1 / (Δf) max ·N f ), where Δf max =480·10 3 Hz and N f =4096.

[0087] In Table 1 below, if the PDSCH DM-RS position l1 of the additional DM-RS is l1 = 12, then N 1,0 =14, otherwise N 1,0 =13.

[0088] If the UE is configured with multiple active component carriers, the first uplink symbol carrying HARQ-ACK information also includes the effect of timing differences between the component carriers.

[0089] For PDSCH mapping type A: If the last symbol of the PDSCH is on the i-th symbol of the time slot (where i < 7), then d 1,1 =7-i, otherwise d 1,1 =0.

[0090] For UE processing capability 1: If the PDSCH is mapping type B, and if the number of allocated PDSCH symbols is 7, then d 1,1 =0, if the number of allocated PDSCH symbols is 4, then d 1,1 =3, and if the number of PDSCH symbols allocated is 2, then d 1,1 =3+d, where d is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH.

[0091] For UE processing capability 2: If the PDSCH is mapping type B, and the number of allocated PDSCH symbols is 7, then d 1,1 =0, and if the number of PDSCH symbols allocated is 4, then d 1,1 d is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH, and if the number of allocated PDSCH symbols is 2, and if the scheduling PDCCH is in a 3-symbol CORESET and the CORESET and PDSCH have the same starting symbol, then d 1,1=3, otherwise d 1,1 It is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH.

[0092] For μ PDSCH When =1, the UE has a scheduling limit of processing capability 2. If the scheduled RB allocation exceeds 136 RBs, the UE defaults to capability 1 processing time. If any PDSCH among multiple PDSCHs is scheduled to have more than 136 RBs with an SCS of 30kHz and follows capability 1 processing time, the UE can skip these PDSCHs for decoding. These PDSCHs have the last symbol within 10 symbols before the start of the PDSCH scheduled to follow capability 2.

[0093] For a UE that supports capability 2 on a given cell, if the higher-level parameter processingType2Enabled in PDSCH-ServingCellConfig is configured for the cell and set to enable, the processing time based on UE processing capability 2 is applied.

[0094] If the PUCCH resource overlaps with another PUCCH or PUSCH resource, the HARQ-ACK is reused; otherwise, the HARQ-ACK message is sent on the PUCCH.

[0095] Otherwise, the UE may not provide a valid HARQ-ACK corresponding to the scheduled PDSCH. proc,1 The value is used for both normal and extended loop prefix cases.

[0096] Table 1: PDSCH processing time for PDSCH processing capacity 1

[0097]

[0098] Table 2: PDSCH processing time for PDSCH processing capacity 2

[0099]

[0100] In the case of PDSCH on cell A with two scheduling cells, the PDCCH scheduling PDSCH can be from one of the two scheduling cells. The PDSCH processing time is determined using one of the following methods.

[0101] Method 1: N1 is based on μ, where μ corresponds to the value that produces the maximum T. proc,1 (μ1) PDCCH μ2 PDCCH μ PDSCH μ UL One of them, where μ1PDCCH and μ2 PDCCH The subcarrier spacing corresponds to the PDCCH on the two scheduling cells that schedule PDSCH respectively.

[0102] Method 2: N1 is based on μ, where μ corresponds to the value that produces the maximum T. proc,1 of (μ) PDCCH μ PDSCH μ UL One of them, where μ PDCCH This corresponds to the minimum subcarrier spacing of the PDCCH on the two scheduling cells that schedule the PDSCH.

[0103] Method 3: When all USS of scheduled cell A are on the configured cell B, then N1 is based on μ, where μ corresponds to (μ PDCCH μ PDSCH μ UL The largest T in ) proc,1 One of them, where μ PDCCH The subcarrier spacing of the PDCCH on the second scheduling cell (cell B) corresponding to the scheduling of the PDSCH. Otherwise, use method 1 or 2.

[0104] In the embodiments discussed above, the PDSCH processing time is used as an example, but the same principle applies to the PUSCH processing time. PCell is used as an example in the embodiments, but the same principle applies to PSCell.

[0105] Example 6

[0106] In carrier aggregation scenarios, the configuration of a P(S)Cell (referred to as "Cell A") can be scheduled by an SCell (referred to as "Cell B"), and Cell A can also support a self-scheduling scheme. For Cell B, if Cell B is configured as a scheduled cell and supports scheduling Cell A, then Cell A has two scheduled cells: Cell A (the first scheduled cell) and Cell B (the second scheduled cell). The PDSCH reception preparation time on the scheduled cell A, which has two scheduled cells, should be determined.

[0107] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. The potential values ​​for SCS are 15 kHz, 30 kHz, 60 kHz, and 120 kHz.

[0108] If there is an OFDM subcarrier spacing (μ) PDCCH The PDCCH carrying the DCI is received on one carrier and scheduled to be received by the DCI on a PDSCH with another OFDM subcarrier spacing (μ). PDCCH If the carrier is another carrier, then the scheme applies.

[0109] If μ PDCCH <μ PDSCH Furthermore, the first symbol (including DM-RS) in the PDSCH allocation defined by the slot offset K0 and the start and length indicators SLIV of the scheduling DCI does not begin earlier than the first symbol of the PDSCH receive slot, wherein the PDSCH receive slot begins at least N times after the PDCCH scheduling PDSCH ends. pdsch If there are 1 PDCCH symbol, the UE is expected to receive the scheduled PDSCH, without considering the effect of the reception timing difference between the scheduling cell and the scheduled cell.

[0110] If μ PDCCH >μ PDSCH Furthermore, the first symbol (including DM-RS) in the PDSCH allocation defined by the slot offset K0 and the start and length indicators SLIV of the scheduling DCI is no earlier than N after the end of the PDCCH scheduling PDSCH. pdsch The UE is expected to receive the scheduled PDSCH starting from the first PDCCH symbol, without considering the timing difference between the scheduling cell and the scheduled cell.

[0111] Table 3: N as a function of subcarrier spacing for scheduling PDCCH pdsch

[0112] <![CDATA[μ PDCCH ]]> <![CDATA[N pdsch [symbol]]]> 0 4 1 5 2 10 3 14

[0113] For PDSCH reception preparation time, in the case of PDSCH on cell A with two scheduling cells, the PDCCH scheduling the PDSCH can be from one of the two scheduling cells. The PDSCH reception preparation time is determined by one of the following methods.

[0114] Method 1: PDSCH receive preparation time is only supported when all USS used for scheduling cell A are in the configured cell B.

[0115] Method 2: The PDSCH reception preparation time of sSCell-schedule-PCell is determined by the PDCCH on sSCell and the PDSCH on PCell / PSCell, and is also applied to the PDSCH on cell A with self-scheduling.

[0116] Method 3: Define different UE capabilities for PDSCH reception preparation time. One capability has only one PDSCH reception preparation time, determined by the PDCCH on sSCell and the PDSCH on PCell / PSCell, and is applied to both cell A self-scheduling and cell B scheduling of cell A. Another capability has two PDSCH reception preparation times: one determined by the PDCCH on sSCell and the PDSCH on PCell / PSCell, and applied only to cell B scheduling of cell A; the other is zero and applied only to cell A self-scheduling.

[0117] Example 7

[0118] When a one-to-two scheduling scheme is supported, the maximum number of unicast DCIs that can be decoded by the UE is determined by each time slot / span on each scheduled cell or on the scheduling cell of every two scheduled cells. In some implementations, Example 7 can also be used for one-to-many scheduling.

[0119] In carrier aggregation scenarios, the PCell (referred to as "cell A") is configured with a self-scheduling scheme. For cell B, cell B is configured as the scheduled cell and is scheduled by cell A. The two PDSCHs on both cells (cell A and cell B) are scheduled by a single DCI on cell A. Alternatively, for cell C, cell C is configured as the scheduled cell and is scheduled by cell A, and the two PDSCHs on both cells (cell B and cell C) are scheduled by a single DCI on cell A. When the two PDSCHs on two cells are scheduled by a single DCI, the maximum number of unicast DCIs that can be decoded by the UE for (one or more) scheduled cells should be determined. In some implementations, these methods can also be used for N PDSCHs on N cells scheduled by a single DCI.

[0120] Cell A has a subcarrier spacing (SCS) of μ1, and cell B has an SCS of μ2. Possible values ​​for SCS are 15kHz, 30kHz, 60kHz, 120kHz, or other values.

[0121] When two PDSCHs on two cells are scheduled by a single DCI, the maximum number of unicast DCIs that the UE can decode for (one or more) the scheduled cells within the monitoring time set of the scheduling cell's time slot / span can be determined by one of the following methods. Optionally, the maximum number of unicast DCIs can be: for FDD, one unicast DCI for scheduling DL and one unicast DCI for scheduling UL; for TDD, one unicast DCI for scheduling DL and two unicast DCIs for scheduling UL; for TDD, two unicast DCIs for scheduling DL and one unicast DCI for scheduling UL. In some implementations, these methods can also be used for N PDSCHs on N cells scheduled by a single DCI.

[0122] Method 1: For every two scheduled cells, determine the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE within the monitoring opportunity set of the time slots / span of the scheduling cells. In this case, for two scheduled cells, for FDD, the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE within the monitoring opportunity set of the time slots / span of the scheduling cells is one, which is a single DCI for scheduling two PDSCHs on the two cells. In some implementations, these methods can also be used for N PDSCHs on N cells scheduled by a single DCI. In this case, for every N scheduled cells, determine the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE within the monitoring opportunity set of the time slots / span of the scheduling cells.

[0123] Method 2: For each scheduled cell, determine the maximum number of unicast DCIs of the scheduled DL that can be decoded by the UE within the monitoring opportunity set in the time slot / span of the scheduled cell. In this case, for each of the two scheduled cells, for FDD, the maximum number of unicast DCIs of the scheduled DL that can be decoded by the UE within the monitoring opportunity set in the time slot / span of that scheduled cell is one, and the DL DCI for the first scheduled cell and the DL DCI for the second scheduled cell are the same, which is a single DCI for scheduling two PDSCHs on the two cells. In some implementations, these methods can also be used for N PDSCHs on N cells scheduled by a single DCI. In the case of scheduling N PDSCHs on N cells by a single DCI, for each of the N scheduled cells, for FDD, the maximum number of unicast DCIs that can be decoded by the UE in the monitoring timing set within the time slot / span of the scheduled cell is one, and the DL DCI for the first scheduled cell and the DL DCI for each of the other scheduled cells are the same, which is a single DCI for scheduling N PDSCHs on N cells.

[0124] Method 3: For each scheduled cell, determine the maximum number of unicast DCIs of the scheduled DL that can be decoded by the UE within the monitoring opportunity set in the time slot / span of the scheduled cell. In this case, for each of the two scheduled cells, for FDD, the maximum number of unicast DCIs of the scheduled DL that can be decoded by the UE within the monitoring opportunity set in the time slot / span of that scheduled cell is one, and the single DCI of the two PDSCHs scheduled on the two cells is counted only by one of the two scheduled cells. Furthermore, for the other of the two scheduled cells, the UE can decode another unicast DL DCI, which can be a traditional DCI or a single DCI of the two PDSCHs scheduled on the two cells. Optionally, the single DCI of the two PDSCHs scheduled on the two cells is counted only by one of the two scheduled cells, which can select the cell (both the scheduling cell and the scheduled cell), i.e., in the case of a single DCI on cell A, cell A is selected to schedule the PDSCH on cell A and the PDSCH on cell B. In some implementations, these methods can also be used for N PDSCHs on N cells scheduled by a single DCI. In the case of N PDSCHs on N cells scheduled by a single DCI, for FDD, the maximum number of unicast DCIs that can be decoded by the UE in the monitoring opportunity set within the time slot / span of the scheduled cell is one, and the single DCI for scheduling N PDSCHs on N cells is counted only for one of the N scheduled cells. Furthermore, for each other cell among the N scheduled cells, the UE can decode another unicast DL DCI, which can be a conventional DCI or a single DCI for scheduling N PDSCHs on N cells.

[0125] Method 4: For every two scheduled cells, determine the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE from the monitoring opportunity set within the time slot / span of the scheduling cell. In this case, for each of the two scheduled cells, for FDD, the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE from the monitoring opportunity set within the time slot / span of the scheduling cell is two, and at least one of the two DL DCIs is a single DCI that schedules two PDSCHs on the two cells. It should be noted that this can also be used for N PDSCHs on N cells scheduled by a single DCI. In the case of N PDSCHs on N cells scheduled by a single DCI, for every N scheduled cells, determine the maximum number of unicast DCIs of the scheduling DL that can be decoded by the UE from the monitoring opportunity set within the time slot / span of the scheduling cell. For each of the N scheduled cells, for FDD, the maximum number of unicast DCIs of the scheduled DL that can be decoded by the UE in the set of monitoring opportunities within the time slot / span of the scheduled cell is N, and at least one of the N DL DCIs is a single DCI of N PDSCHs scheduled on the N cells.

[0126] Although FDD is used as an example in some embodiments discussed in this patent document, the same principles apply to TDD. Similarly, although PCell is used as an example in some embodiments discussed in this patent document, the same principles apply to PSCell.

[0127] Example 8

[0128] In Rel-15, the PDSCH processing time for PDSCH processing capabilities 1 and 2 depends on whether additional DMRS is configured.

[0129] For the PDSCH processing time, N1 is based on μ in Tables 1 and 2 below, which are for UE processing capabilities 1 and 2 respectively, where μ corresponds to the time required to generate the maximum T. proc,1 of (μ) PDCCH μ PDSCH μ UL One of them, where μ PDCCH The subcarrier spacing corresponding to the PDCCH that schedules the PDSCH, μ PDSCH The subcarrier spacing corresponding to the scheduled PDSCH, and μ UL The subcarrier spacing of the uplink channel to which HARQ-ACK will be transmitted.

[0130] If the first uplink symbol of the PUCCH carrying HARQ-ACK information (as defined by the allocated HARQ-ACK timing K1 and the PUCCH resources to be used, and including the effects of timing advance) does not begin earlier than the start of symbol L1, where L1 is defined as the next uplink symbol whose CP is acknowledged after the end of the last symbol of the PDSCH carrying TB is confirmed, then... proc,1 =(N1+d) 1,1 (2048+144)·κ2 -μ ·T C Then, the UE will provide a valid HARQ-ACK message.

[0131] N1 is based on μ in Tables 1 and 2 for UE processing capabilities 1 and 2 respectively, where μ corresponds to the value that generates the maximum T. proc,1 of (μ) PDCCH μ PDSCH μ UL One of them, where μ PDCCH The subcarrier spacing corresponding to the PDCCH that schedules the PDSCH, μ PDSCH The subcarrier spacing corresponding to the scheduled PDSCH, and μ UL The subcarrier spacing of the uplink channel to which HARQ-ACK will be transmitted corresponds to, and κ = T s / T c =64, where T s =1l(Δf ref ·N f,ref ), Δf ref =15·10 3 Hz and N f,ref =2048, T c =1 / (Δf) max ·N f ), where Δf max =480·10 3 Hz and N f =4096.

[0132] In Table 1 below, if the PDSCH DM-RS position l1 of the additional DM-RS is l1 = 12, then N 1,0 =14, otherwise N 1,0 =13.

[0133] If the UE is configured with multiple active component carriers, the first uplink symbol carrying HARQ-ACK information also includes the effect of timing differences between the component carriers.

[0134] For PDSCH mapping type A: If the last symbol of the PDSCH is on the i-th symbol of the time slot (where i < 7), then d1,1 =7-i, otherwise d 1,1 =0.

[0135] For UE processing capability 1: If the PDSCH is mapping type B, and if the number of allocated PDSCH symbols is 7, then d 1,1 =0, if the number of allocated PDSCH symbols is 4, then d 1,1 =3, and if the number of PDSCH symbols allocated is 2, then d 1,1 =3+d, where d is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH.

[0136] For UE processing capability 2: If the PDSCH is mapping type B, then if the number of allocated PDSCH symbols is 7, then d 1,1 =0, and if the number of PDSCH symbols allocated is 4, then d 1,1 d is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH, and if the number of allocated PDSCH symbols is 2, and if the scheduling PDCCH is in a 3-symbol CORESET and the CORESET and PDSCH have the same starting symbol, then d 1,1 =3, otherwise d 1,1 It is the number of overlapping symbols between the scheduling PDCCH and the scheduling PDSCH.

[0137] For μ PDSCH When =1, the UE has a scheduling limit of processing capability 2. If the scheduled RB allocation exceeds 136 RBs, the UE defaults to capability 1 processing time. If any PDSCH among multiple PDSCHs is scheduled to have more than 136 RBs with an SCS of 30kHz and follows capability 1 processing time, the UE can skip these PDSCHs for decoding, and these PDSCHs have the last symbol within 10 symbols before the start of the PDSCH scheduled to follow capability 2.

[0138] For a UE that supports capability 2 on a given cell, if the higher-level parameter processingType2Enabled in PDSCH-ServingCellConfig is configured for the cell and set to enable, the processing time based on UE processing capability 2 is applied.

[0139] If the PUCCH resource overlaps with another PUCCH or PUSCH resource, the HARQ-ACK is reused; otherwise, the HARQ-ACK message is sent on the PUCCH.

[0140] Otherwise, the UE may not provide a valid HARQ-ACK corresponding to the scheduled PDSCH.proc,1 The value is used for both normal and extended cyclic prefixes. See Tables 1 and 2 above.

[0141] The new DMRS parameters dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2 and dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2 were introduced for DCI format 1_2 in Rel-16 URLLC WI and are not yet reflected in the current Rel-16 specification. For DCI format 1_2, there are four ways to include the newly introduced RRC parameters. The disclosed techniques can be implemented in some embodiments to address this issue using one of the methods listed below.

[0142] Method 1: PDSCH processing time is independent of DCI format. That is, the PDSCH decoding time N1 only follows the shortened processing time of PDSCH processing capability 1, or the allowed conditions of PDSCH processing capability 2, when dmrs-AdditionalPosition = 'pos0' is configured in dmrs-DownlinkConfig for dmrs-DownlinkForPDSCH-MappingTypeA, dmrs-DownlinkForPDSCH-MappingTypeB, dmrs-DownlinkForPDSCH-MappingTypeA-DCI-1-2, and dmrs-DownlinkForPDSCH-MappingTypeB-DCI-1-2. This method will result in a uniform N1 regardless of the DCI format, but will lead to a longer processing time even if no PDSCH with additional DMRS is scheduled for PDSCH processing capability 1, and it will limit the scheduling of PDSCH processing capability 2. For example, Method 1 corresponds to Tables 1-1 and 2-1.

[0143] Table 1-1: PDSCH processing time for PDSCH processing capacity 1

[0144]

[0145] Table 2-1: PDSCH processing time for PDSCH processing capacity 2

[0146]

[0147] Method 2: The PDSCH processing time is defined according to the DMRS configuration. In other words, the PDSCH processing time can differ for PDSCHs scheduled using the traditional DCI format (i.e., DCI format 1_1) and the new DCI format (i.e., DCI format 1_2). This is more flexible, but it requires the UE to dynamically change the UE PDSCH processing time for different PDSCHs scheduled using different DCI formats. For example, Method 2 corresponds to Tables 1-2 and 2-2.

[0148] Table 1-2: PDSCH processing time for PDSCH processing capacity 1

[0149]

[0150] Table 2-2: PDSCH processing time for PDSCH processing capacity 2

[0151]

[0152] Method 3: For PDSCH processing capability 1, the PDSCH processing time is independent of the DCI format; and for PDSCH processing capability 2, the PDSCH processing time is defined according to the DMRS configuration. For example, Method 3 corresponds to Tables 1-1 and 2-2.

[0153] Method 4: For PDSCH processing capability 2, the PDSCH processing time is independent of the DCI format; and for PDSCH processing capability 1, the PDSCH processing time is defined according to the DMRS configuration. For example, Method 4 corresponds to Tables 1-2 and 2-1.

[0154] In some embodiments, the disclosed techniques may be implemented to determine the maximum number of DCIs that the UE can process.

[0155] In the implementation, when the scheduled cell has two scheduled cells, the time granularity (MO set for each time slot) and cell determination method used to process the maximum number of DCIs are as follows:

[0156] When each time slot has the same monitoring capability (e.g., FG 3-1): When different SCS, PCell or sSCell or max SCS or min SCS are used to determine the cell with the maximum number of DCIs per time slot, the same SCS can be determined based on the time slot of any scheduled cell.

[0157] When the monitoring capability of each time slot is the same (e.g., fg3-5b): When the SCS is different, Method 1 is determined based on the SCS size relationship between the PCell and sSCell. When the SCS of sSCell is smaller than the SCS of PCell (small SCS scheduling large SCS), the span is determined based on sSCell. When the SCS of sSCell is larger than the SCS of PCell (large SCS scheduling small SCS), Alternative Scheme 1 is executed for each time slot of sSCell. The maximum number of DCI processing opportunities in one operation is determined by each span of PCell. Method 2 configures each N spans of sSCell or each span of PCell as a processing time unit, i.e., each N spans of sSCell or each span of PCell is used to determine the number of DCIs processed by the scheduled cell. For example, when the SCS of sSCell is smaller than the SCS of PCell (small SCS scheduling large SCS), N=1 is configured. When the SCS of sSCell is larger than the SCS of PCell (large SCS scheduling small SCS), N=2 is configured. Method 3 is based on cell priority. Method 4 specifies that when all USS used for scheduling the PCell are on the sSCell, the sSCell is selected as the scheduling cell. When the USS used for scheduling the PCell is on both the PCell and the sSCell, Method 1, 2, or 3 is used.

[0158] When the SCSs are the same, in some implementations, Method 1 can be used. Step 1: First, select the scheduling cell based on the combined (X, Y) priority. Step 2: If (X, Y) are the same, the scheduling cell is selected based on the span priority. Step 3: If (X, Y) are the same, and the span is also the same, the scheduling cell is selected based on the cell priority. Method 2 can also be used. The scheduling cell is selected directly based on the cell priority. When all USS used for scheduling the PCell are on the sSCell, Method 3 can also be used. The sSCell is selected as the scheduling cell. When the USS used for scheduling the PCell are on both the PCell and the sSCell, Method 1 or 2 is used.

[0159] Regarding the (X, Y) priority, Alternative 1 determines each span of the MO set of cells with smaller X values. Alternative 2 determines each span of the MO set of cells with larger X values. For a cell, when multiple (X, Y) are reported, the X above is the X used to determine the span of the cell.

[0160] Regarding the priority of span count, Alternative Option 1 prioritizes cells with larger span counts to determine each span in the MO set. Alternative Option 2 prioritizes cells with smaller span counts to determine each span in the MO set.

[0161] Regarding cell priority, Alternative 1 prioritizes PCell to determine each span of the MO set. Alternative 2 prioritizes sSCell to determine each span of the MO set. Alternative 3 corresponds to the larger SCS, and Alternative 4 corresponds to the smaller SCS.

[0162] In another implementation, when two PDSCHs on two cells are scheduled by a single DCI, the method for determining the maximum number of DCIs is as follows.

[0163] Method 1: One DL DCI is processed for every two scheduled cells. Only one DL DCI is processed between two cells.

[0164] Method 2: Each scheduled cell processes one DL DCI. Each cell treats it as one DLDCI processed by that cell.

[0165] Method 3: Each scheduled cell processes one DL DCI. A two-cell scheduled DCI sent by the gNB in ​​each time slot is included in only one cell and is treated as one DL DCI for processing. A second two-cell scheduled DCI or another can be processed. For a conventional DL DCI of another cell, it is included in the other cell and is treated as one DL DCI.

[0166] Method 4: Two DL DCIs are processed for every two scheduled cells, one of which is a two-cell scheduling DCI.

[0167] Figure 11 Examples of wireless communication processes based on some exemplary embodiments of the disclosed technology are shown.

[0168] In some implementations, the wireless communication process 1100 may include: in 1110, the wireless device determines, within the time interval of the scheduling cells of each first number of scheduled cells, a maximum number of downlink control information (DCI) that can be decoded by the wireless device.

[0169] It should be understood that this document discloses techniques that can be implemented in various embodiments to determine downlink control information in a wireless network. The disclosed and other embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or in computer software, firmware, or hardware (including the structures disclosed in this document and their structural equivalents), or in a combination of one or more of these. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or control of the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of substances that implement machine-readable propagated signals, or a combination of one or more of these. The term "data processing apparatus" includes all means, devices, and machines for processing data, including, for example, a programmable processor, a computer, or a plurality of processors or computers. In addition to hardware, the apparatus may also include code that creates an execution environment for the computer program in question, for example, code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of these. Propagation signals are artificially generated signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information for transmission to appropriate receiver devices.

[0170] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language, including compiled or interpreted languages, and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suited to a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), as a single file dedicated to the program in question, or as multiple collaborative files (e.g., a file storing one or more modules, subroutines, or code sections). Computer programs can be deployed to execute on a single computer or on multiple computers located in one place or distributed across multiple locations and interconnected via a communication network.

[0171] The processes and logic flows described in this document can be executed by one or more programmable processors, which execute one or more computer programs to perform functions by manipulating input data and generating output. The processes and logic flows can also be executed by dedicated logic circuits, and the devices can be implemented as dedicated logic circuits, such as FPGAs (Field Programmable Gate Arrays) or ASICs (Application Specific Integrated Circuits).

[0172] For example, processors suitable for executing computer programs include general-purpose microprocessors and special-purpose microprocessors, as well as any one or more processors in any kind of digital computer. Typically, a processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include, or be operatively coupled to, one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, to receive data from, transfer data to, or both of these mass storage devices. However, a computer does not need to have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD-ROMs and DVD-ROMs. The processor and memory may be supplemented or incorporated therein by dedicated logic circuitry.

[0173] Some embodiments may preferably implement one or more of the following schemes listed in the terms format. The following terms are supported and further described in the examples above and throughout the document. As used in the following terms and claims, a wireless terminal may be a user equipment, a mobile station, or any other wireless terminal that includes a fixed node (e.g., a base station). Network equipment includes a base station, which includes a Generation Node B (gNB), an Enhanced Node B (eNB), or any other device performing as a base station. Resource range may refer to a range of time-frequency resources or blocks.

[0174] Clause 1. A method for wireless communication, comprising a wireless device determining, within a time interval of a scheduling cell for every first number of scheduled cells, a maximum number of downlink control information (DCI) that can be decoded by the wireless device; wherein the DCI is used to schedule downlink (DL) data or uplink (UL) data.

[0175] Clause 2. The method according to Clause 1, wherein the time slot is a time slot, and the first quantity is one, and each scheduled cell has two scheduling cells, and wherein the maximum number of downlink control information (DCI) that can be decoded by the radio device is determined within a time slot of one of the two scheduling cells of each scheduled cell.

[0176] Clause 3. The method according to Clause 2, wherein one of the two scheduling cells comprises one of the following: a first scheduling cell, which is a self-scheduled scheduled cell; a second scheduling cell, which is different from the first scheduling cell; a scheduling cell with a larger subcarrier spacing (SCS) among the two scheduling cells; and a scheduling cell with a smaller SCS among the two scheduling cells.

[0177] Clause 4. The method according to Clause 1, wherein the time interval is a time slot, and the first quantity is one, and the scheduled cell has two scheduled cells, and wherein the maximum number of downlink control information (DCI) that the radio device can decode is determined within the span of one of the two scheduled cells of each scheduled cell.

[0178] Clause 5. The method according to Clause 4, wherein determining one of the two scheduling cells comprises a priority rule associated with at least one of the cells, span number, or combination (X, Y), wherein X indicates the number of symbols corresponding to the minimum gap between the starting symbols of two consecutive spans, and Y indicates the maximum number of consecutive symbols per span.

[0179] Clause 6. The method according to Clause 5, wherein the priority rules include: one scheduling cell in the scheduling cells is selected based on a priority rule associated with each combination (X, Y) of the scheduling cells; when multiple scheduling cells have the same priority relative to each combination (X, Y), one scheduling cell in the scheduling cells is selected based on a priority rule associated with the number of spans; and when multiple scheduling cells have the same priority relative to the number of spans, one scheduling cell in the scheduling cells is selected based on a priority rule associated with the cell.

[0180] Clause 7. The method according to any one of Clauses 5 to 6, wherein the priority rule associated with each combination (X, Y) of scheduling cells includes one of the following: selecting a scheduling cell with an X value smaller than that of other scheduling cells; and selecting a scheduling cell with an X value larger than that of other scheduling cells.

[0181] Clause 8. The method according to any one of Clauses 5 to 6, wherein the priority rule associated with the number of spans of each scheduling cell includes one of the following: selecting a scheduling cell with a larger span than other scheduling cells; and selecting a scheduling cell with a smaller span than other scheduling cells.

[0182] Clause 9. The method according to any one of Clauses 5 to 6, wherein the priority rule associated with the cell includes one of the following: selecting a first scheduling cell as the primary cell (PCell) among the scheduling cells; and selecting a second scheduling cell as the secondary cell (SCell) among the scheduling cells and configuring it as the scheduling PCell.

[0183] Clause 10. The method according to Clause 4, wherein, when all radio device-specific search spaces used for scheduling the primary cell (PCell) are on secondary cells (SCells) configured to schedule the PCell, the SCell is selected as one of the scheduling cells.

[0184] Clause 11. The method according to any one of Clauses 4 to 10, wherein the scheduling cells have the same subcarrier spacing (SCS).

[0185] Clause 12. The method according to Clause 4, wherein determining one of the two scheduled cells is performed based on one of the following: a rule associated with the subcarrier spacing (SCS) relationship between the two scheduled cells; the configured cells and within a first number span, wherein the first number is greater than or equal to one; and a priority rule associated with the cell.

[0186] Clause 13. The method according to Clause 12, wherein determining one of the scheduling cells based on a rule associated with the SCS relationship between the two scheduling cells includes at least one of the following: selecting an SCell as one of the scheduling cells when the SCS of the SCell configured as the scheduling PCell is less than the SCS of the PCell; selecting a PCell as one of the scheduling cells when the SCS of the SCell configured as the scheduling PCell is greater than the SCS of the PCell; or selecting a PCell as one of the scheduling cells when the SCS of the SCell configured as the scheduling PCell is greater than the SCS of the PCell, and selecting according to time slots to process the maximum number of DCIs.

[0187] Clause 14. The method according to Clause 12, wherein determining one of the scheduled cells based on the configured cells and within a first number of spans is performed according to: multiple spans of the SCell if the SCS of the SCell is greater than the SCS of the PCell; or the span of the SCell if the SCS of the SCell is less than the SCS of the PCell.

[0188] Clause 15. The method of Clause 12, wherein one of the scheduled cells selected based on the priority rules associated with the cell includes one of the following: PCell, SCell, a scheduled cell whose SCS is greater than the SCS of other scheduled cells, and a scheduled cell whose SCS is less than the SCS of other scheduled cells.

[0189] Clause 16. The method according to Clause 1, wherein the time slot is a time slot or span, and multiple scheduled cells are scheduled by a single DCI, and wherein the maximum number of downlink control information (DCI) that the radio device can decode is determined within the time slot or span of each scheduled cell or the scheduling cell of multiple scheduled cells.

[0190] Clause 17. The method according to Clause 16, wherein the maximum number of DCIs that the radio device can decode is: one DCI within a time slot or span of every first number of scheduled cells, and one DCI is a single DCI used for scheduling a first number of Physical Downlink Shared Channels (PDSCH) or Physical Uplink Shared Channels (PUSCH) on the first number of scheduled cells; or two DCIs within a time slot or span of every first number of scheduled cells, and one of the two DCIs is a single DCI used for scheduling a first number of PDSCHs or PUSCHs on the first number of scheduled cells.

[0191] Clause 18. The method according to Clause 16, wherein the maximum number of DCIs that the radio device can decode is one DCI per time slot or span of each scheduled cell, and wherein a single DCI for scheduling a first number of PDSCHs or PUSCHs on a first number of scheduled cells is one DCI for each scheduled cell, or a single DCI for scheduling a first number of PDSCHs or PUSCHs on a first number of scheduled cells is one DCI for one of the first number of scheduled cells.

[0192] Clause 19. The method according to any one of Clauses 4 or 16, wherein the span is a continuous set of symbols in a time slot in which the wireless device monitors the physical channel.

[0193] Clause 20. An apparatus for wireless communication, comprising a processor configured to perform a method according to any one of Clauses 1 to 19.

[0194] Clause 21. A non-transitory computer-readable medium having code stored thereon, which, when executed by a processor, causes the processor to perform the method pursuant to any one of Clauses 1 to 19.

[0195] While this patent document contains numerous details, these details should not be construed as limiting any invention or the scope of the claims, but rather as descriptions of features characteristic of specific embodiments of a particular invention. Certain features described in the context of individual embodiments in this patent document may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually in multiple embodiments or in any suitable sub-combination. Furthermore, although features may be described above as functioning in certain combinations, and even initially claimed in this way, in some cases, one or more features from a claimed combination may be removed from that combination, and the claimed combination may be for sub-combinations or variations thereof.

[0196] Similarly, although operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the specific order or sequence shown, or requiring all illustrated operations to obtain the desired result. Furthermore, the separation of various system components in the embodiments described in this patent document should not be construed as requiring such separation in all embodiments.

[0197] Only some implementation methods and examples are described, and other implementation methods, enhancements and variations can be achieved based on the content described and shown in this patent document.

Claims

1. A method for wireless communication, comprising: Within the time slot of the scheduling cell in each scheduled cell, the wireless device determines the maximum number of Downlink Control Information (DCI) messages to be decoded by the wireless device. The scheduled cell has two scheduled cells; The maximum number of DCIs that the wireless device can decode is determined within a time slot of one of the two scheduling cells of the scheduled cell. The DCI is used to schedule downlink DL data or uplink UL data; and One of the two scheduling cells includes one of the following: The first scheduling cell is the scheduled cell that also has self-scheduling capabilities; The second scheduling cell is a scheduling cell different from the first scheduling cell; and One of the two scheduling cells has the smaller SCS.

2. An apparatus for wireless communication, comprising a memory and a processor, wherein the memory stores code that, when executed by the processor, performs the method according to claim 1.

3. A non-transitory computer-readable medium storing code that, when executed by a processor, causes the processor to perform the method according to claim 1.

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