Power control parameter indication

Abstract

Methods, systems, and devices related to digital wireless communications are described. An illustrative method of wireless communications includes indicating, by a communications device via downlink control information (DCI), power control information based on a plurality of parameter sets. The power control information is used to indicate a transmission power on a resource, and the plurality of parameter sets are predefined for the resource.

Description

Technical Field

[0001] This patent document relates generally to wireless communications. Background Art

[0002] When transmitting uplink services in a communication system, services with different transmission delay reliability requirements may be transmitted differently. For example, a service with lower reliability may be preempted by a service with higher reliability. As another example, a service with lower transmission reliability may require a longer delay. For services with higher reliability, the system may increase their transmission power (e.g., on some overlapping resources) to improve transmission reliability. Summary of the invention

[0003] This document relates to methods, systems, and devices related to digital wireless communications, and more particularly, to mechanisms for indicating uplink retransmissions.

[0004] In one exemplary aspect, a wireless communication method is disclosed. The method includes, for example, indicating power control information by a communication device through downlink control information (DCI) based on multiple parameter sets. The power control information is used to indicate a transmission power on a resource, and the multiple parameter sets are predefined for the resource.

[0005] In another exemplary aspect, a wireless communication device is disclosed, which is configured or operable to perform the above method.

[0006] In yet another exemplary aspect, the above method is embodied in the form of processor executable code and stored in a computer readable program medium.

[0007] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 An exemplary DCI according to some embodiments is shown.

[0009] Figure 2 Another exemplary DCI is shown.

[0010] Figure 3 is a schematic diagram showing an example of occupied and allocated resources.

[0011] Figure 4 and Figure 5 is a schematic diagram showing an example of adjusting power based on DCI.

[0012] Fig. 6A and 6B is a flow chart of an exemplary method of wireless communication.

[0013] Figure 7 An example of a wireless communication system to which the technology according to one or more embodiments of the present technology can be applied is shown.

[0014] Figure 8 A block diagram representation of a portion of a hardware platform. DETAILED DESCRIPTION

[0015] The examples of techniques and implementations in this document can be used to improve performance in a multi-user wireless communication system. The term "exemplary" is used to mean "an example of..." and does not imply an ideal or preferred embodiment unless otherwise specified. Section headings are used in this document to facilitate understanding and do not limit the techniques disclosed in the sections to the corresponding sections. In the description, some terms from the 5G standard are used only to facilitate understanding, and the techniques described in this document are applicable to other wireless systems and protocols different from the 5G standard currently released by the 3GPP organization.

[0016] The disclosed technology relates to a method for implementing uplink service multiplexing based on power control. The method effectively integrates existing and new service-based power control modes.

[0017] The technology of the present disclosure provides a method and system for indicating power control parameters, which defines a power control downlink control information (DCI) format compatible with resource multiplexing. The disclosed technology can effectively implement authorization-free and authorization-based uplink transmission multiplexing, thereby improving resource utilization efficiency. Authorization-free uplink transmission means transmission using PUSCH with configured authorization, that is, PUSCH transmission on configured authorized resources. Authorization-free resources may also be referred to as configured authorized resources. The terms authorization-free resources and authorization-free transmission are used in the following description.

[0018] There is an increasing demand for fourth-generation mobile communication technologies (e.g., 4G, Long Term Evolution (LTE) and Long Term Evolution Advanced (LTE-Advance / LTE-A)) and fifth-generation mobile communication technologies (5G, 5th generation mobile communication technology). From the current trend, both 4G systems and 5G systems include features for supporting enhanced mobile broadband, ultra-high reliability, ultra-low latency transmission, and a large number of connections.

[0019] In order to support the characteristics of ultra-high reliability and ultra-low latency transmission, low latency and high reliability, services need to be transmitted with a shorter transmission time. At the same time, other services that have not been transmitted or are being transmitted but have a longer transmission time can be preempted. Since the occurrence of preempted transmission may not be understood by different user equipment (UE) of uplink transmission, in order to minimize the performance impact on high reliability and low latency services, the preemption indication information should be notified to the preempted transmission user equipment. Accordingly, the uplink transmission of isolated services or lower reliability services can be canceled or stopped, thereby avoiding simultaneous transmission of low latency and high reliability on the same resources, which may cause performance degradation.

[0020] Currently, for downlink service preemptive transmission, a solution is provided by dividing the downlink resources into 14 blocks, which can be represented by {M,N}={14,1} or {7,2} when configuring the reference downlink resources. "M" represents the number of partitions in the time domain, and "N" represents the number of partitions in the frequency domain. In order to notify whether a block is preempted or occupied, a 14-bit bitmap can be used. However, for uplink transmission, there is currently no effective way to solve the indication of preemptive transmission.

[0021] In some embodiments, uplink transmission includes two types: authorization-based uplink transmission and authorization-free uplink transmission. Authorization-based uplink transmission refers to that the user equipment performs uplink service transmission according to the uplink authorization performed by the base station and determines the corresponding transmission resources. Authorization-free uplink transmission refers to an embodiment in which the user equipment independently selects uplink service transmission from a semi-statically configured authorization-free resource set. For this type of transmission, the base station cannot predetermine which candidate resources can be used for a specific transmission. Therefore, when the authorization-free uplink transmission overlaps with other low-priority transmission resources, the base station cannot notify the preempted user equipment in advance. Therefore, the preemption indication is no longer applicable.

[0022] To solve this problem, this document provides a "power control" scheme that can be implemented by some embodiments as a feasible solution. For example, some embodiments can dynamically increase the transmission power of the unlicensed uplink transmission when other low-priority transmissions occupy the unlicensed uplink transmission resources, thereby improving the performance of the unlicensed transmission (e.g., the probability of successful transmission). This document also provides how to implement such power control, including describing the signaling format that supports the above-mentioned power control scheme, and how such power control scheme (e.g., multiplexing-based service power control) can be effectively combined with existing power control modes.

[0023] First embodiment

[0024] This embodiment describes a downlink control information (DCI) format 101 for indicating power control information. Figure 1 The DCI shown is used to indicate power control information.

[0025] like Figure 1 As shown, DCI 101 includes two indication fields: a TPC command field 103 and a resource indication field 105. The TPC command field 103 occupies "X" bits, including "N" TPC command blocks, and each TPC command block occupies "M" bits. For example, in some embodiments, "M" can be 2 or 3, which corresponds to the case when a TPC command block contains a TPC command or when a TPC command block contains a TPC command and a closed-loop indicator. Then, "X" can be greater than or equal to "N*M". When "X>N*M", the last "(XN*M)" bits of the TPC command field can be filled with zeros. Each TPC command block can be used to indicate a closed-loop power control parameter corresponding to a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) of a user equipment (UE).

[0026] In some embodiments, the bit sizes of different TPC command blocks in one TPC command field may be different.

[0027] As in Figure 1 As indicated in , the last "Y" bit of the DCI 101 may be a resource indication field 105, and each bit indicates a resource occupancy state, for example, as described in the fourth embodiment, more than one power control parameter set is predetermined. Then, the information in the resource indication field 105 indicates which of the multiple power control parameter sets is selected. The power control parameter set may be selected based on at least one of whether the corresponding unlicensed resource is occupied (e.g., by a license-based service), an interference level of the resource, a priority level of transmission on the resource, and a data retransmission state.

[0028] In some embodiments, the information in the resource indication field can also be used to indicate at least one of the following: whether the unlicensed resource is occupied; a high or low interference level of the resource; and a high or low priority level for transmission on the resource; a retransmission or a first transmission. The UE then determines which power control parameter set to use based on the above indication.

[0029] In some embodiments, the relationship between the TPC command block and the UE can be determined or calculated based on the UE identification (UE ID). For example, the number of TPC command blocks can be modulo-operated using the UE ID (e.g., the result is added by 1) to obtain the index of the TPC command block of the UE in the TPC command field.

[0030] In some embodiments, the relationship between the TPC command block and the UE can be configured through RRC (Radio Resource Control) signaling. For example, in RRC signaling, the relationship between the TPC command block and the UE can be configured (for example, when configuring the search space set of the PDCCH carrying DCI101).

[0031] In some embodiments, the relationship between the TPC command block and the UE can be configured through medium access control (MAC) layer signaling. For example, in MAC signaling, the relationship between the TPC command block and the UE can be configured.

[0032] In some embodiments, the relationship between the TPC command block and the UE may be configured through physical layer signaling. For example, the relationship may be configured in the downlink control information used to schedule the PUSCH for the UE.

[0033] Alternatively, in some embodiments, the relationship between the TPC command block and the UE may be determined by any combination of the methods discussed above. For example, for a UE transmitting a grant-based uplink service, a physical layer signaling configuration method may be used, while for a UE transmitting a grant-free uplink service, an RRC signaling configuration method may be used.

[0034] In some embodiments, one TPC command block corresponds to one resource and the TPC command is indicated to multiple UEs configured to share the same resource.

[0035] In some embodiments, multiple resources are configured for the UE. And at least a portion of the multiple resources need to be indicated in a DCI. Multiple TPC command blocks will correspond to the UE, indicating different power control parameters for each resource. The UE then needs to check the multiple TPC command blocks corresponding to the resources configured for it.

[0036] In some embodiments, one TPC command block corresponds to one resource, which is shared by multiple UEs. The TPC command blocks in one DCI are listed by resource ID in a resource pool shared by multiple UEs. The UE needs to check multiple TPC command blocks corresponding to the resources configured for it. Figure 2As shown, there are five unlicensed resources (i.e., 1-5) including the resource pool to be indicated. Therefore, five TPC command blocks are defined. The mapping relationship between the TPC command blocks and the resources can be pre-configured, for example, TPC command block 1 corresponds to unlicensed resource 1, TPC command block 2 corresponds to unlicensed resource 2, TPC command block 3 corresponds to unlicensed resource 3, TPC command block 4 corresponds to unlicensed resource 4, and TPC command block 5 corresponds to unlicensed resource 5. And unlicensed resources 1, 2, and 3 are configured to UE1. If UE1 plans to transmit data on one or more of unlicensed resources 1, 2, and 3, UE1 needs to check the corresponding TPC command blocks.

[0037] In some embodiments, the number of bits included in the resource indication field 105 can be determined according to the number of resources to be indicated. For example, assuming that the number of unlicensed resources configured by RRC signaling is 5, and each unlicensed resource uses 1 bit to indicate occupancy information. Then the resource indication field 105 occupies the last 5 bits of the DCI 101.

[0038] In some embodiments, the number of bits included in the resource indication field 105 may also be predetermined or fixed to "Y" bits. When the number of resources to be indicated is less than "Y", the upper (or lower) bits of the resource indication field 105 may be filled with zeros. The relationship between valid bits (e.g., resources having non-zero bits in the resource indication field 105) and the resources to be indicated may be configured through RRC signaling, physical layer signaling, medium access control (MAC) layer signaling, or based on appropriate predefined rules to map bits.

[0039] like Figure 2 As shown, DCI 101 is used to indicate the occupancy of unlicensed resources (also called reference uplink resources, RUR) in a predefined range of time-frequency domain resources. For example, there is one time slot in the time domain and the frequency domain is equal to the active uplink bandwidth part (active UL BWP). In this area, such as Figure 2 As shown in FIG. 1 , a total of 5 unlicensed resources are configured. The bit position in DCI 101 can be determined when configuring the unlicensed resources. Specifically, when configuring the unlicensed resources for each unlicensed UE, the unlicensed resources and the bit position in DCI 101 can be indicated at the same time. That is, the bit position of the unlicensed resources in DCI 101 can be directly indicated, or the bit position of the unlicensed resources in the resource indication field 105 can be indicated.

[0040] Alternatively, the order of the unlicensed resources may be defined according to the principle of "time domain first and frequency domain second". This order may be used to define the relationship between the unlicensed resources and the bit positions in the DCI 101. Figure 2The five unlicensed resources (i.e., 1-5) shown in the figure are first sorted according to the time domain (e.g., unlicensed resources with earlier start-up time have higher order), and then the frequency domain (e.g., for unlicensed resources with the same start-up time, higher frequencies have higher orders). In some embodiments, the unlicensed resources can be sorted differently (e.g., lower frequencies have higher orders).

[0041] like Figure 2 As shown, based on the above principle, the order of the five unlicensed resources is indicated as 1, 2, 3, 4 and 5. If the resource indication field 105 contains 5 bits, then the unlicensed resources 1-5 correspond to the highest bit to the lowest bit in the resource indication field 105. In some other embodiments, the order of the unlicensed resources can also be defined according to the principle of "frequency domain first and time domain second". In this way, the UE not only needs to know its own unlicensed resource configuration, but also needs to know the configuration of all unlicensed resources indicated by DCI 101 within the time-frequency resource range, so as to obtain the order of all unlicensed resources. Accordingly, the bit position of the unlicensed resource corresponding to the UE in the resource indication field 105 can be determined.

[0042] In the first embodiment, the unlicensed resources of the UE are configured separately, and the unlicensed resources may be orthogonal to each other (i.e., there is no overlap), or overlap with each other. In some embodiments, the dimensions of the time-frequency domain of each unlicensed resource may be the same. In some embodiments, the dimensions of the time-frequency domain of each unlicensed resource may be different.

[0043] Second embodiment

[0044] In this embodiment, a Radio Network Temporary Identifier (RNTI) for a cyclic redundancy check bit corresponding to the DCI 101 is defined.

[0045] An RNTI, such as a TPC-CGPUSCH-RNTI (e.g., "CG" stands for "configured grant"), which is different from the existing TPC-PUSCH-RNTI or TPC-PUCCH-RNTI, is used to scramble the cyclic redundancy check bits corresponding to the DCI 101. The RNTI is defined for the DCI and is used for power control of the configured grant resources. In some embodiments, the physical downlink control channel (PDCCH) carrying the DCI 101 can have the same DCI size as the existing DCI format (e.g., DCI format 2_2). In some embodiments, the terminal can identify the currently detected PDCCH carrying the DCI 101 from other DCIs by using a different RNTI.

[0046] Third embodiment

[0047] This embodiment describes a method for indicating authorization-free resource occupation.

[0048] In a first embodiment, information about which power control parameter set is used in the resource indication field uses 1 bit. The information in the resource indication field may also indicate at least one of the following: whether the unlicensed resource is occupied; a high or low interference level of the resource; a high or low priority level for transmission on the resource; a retransmission or a first transmission. One method is to use 1 bit for such indication. For example, "0" represents that the corresponding resource is not occupied, and "1" represents that the corresponding resource is occupied. In some embodiments, such information may be multiple bits.

[0049] Method 1:

[0050] For each unlicensed resource, it can be divided into an equal number of sub-resource blocks for more detailed indication. For example, if the unlicensed resource occupies 2 symbols in the time domain and occupies 8 resource blocks (RBs) in the frequency domain, the unlicensed resource can be allocated 4 sub-resource blocks (1 symbol * 4RBs) and 4 bits are used to perform resource occupancy indication.

[0051] Method 2:

[0052] For each unlicensed resource, multiple bits may be used to indicate the status of the unlicensed resource being occupied. For example, two bits may be used to indicate the occupancy rate of the unlicensed resource. In this example, "00" indicates that the unlicensed resource is not occupied. "01" indicates that the unlicensed resource is occupied, and the occupancy rate is less than 1 / 3. "10" indicates that the unlicensed resource is occupied, and the occupancy rate is between 1 / 3 and 2 / 3. "11" indicates that the unlicensed resource is occupied, and the occupancy rate is greater than 2 / 3.

[0053] Fourth embodiment

[0054] This embodiment describes a method for determining a power control parameter according to DCI 101 by a UE.

[0055] More than one power control parameter set is predefined, and which power control parameter set to apply may be determined based on whether the unlicensed resources indicated by the resource indication field 105 are occupied.

[0056] Method 1:

[0057] Two open-loop power control parameter sets {P0, α}#1 and {P0, α}#2 may be defined. For example, in {P0, α}#1, P0 (e.g., target received power) may be "-106 dBm", and α (e.g., path loss compensation factor) may be "0.8". In {P0, α}#2, P0 may be "-100 dBm", and α may be "1". {P0, α}#1 corresponds to unlicensed resources that are not occupied by other uplink transmissions, and {P0, α}#2 corresponds to unlicensed resources that are already occupied by other uplink transmissions.

[0058] When a certain UE receives DCI 101 and identifies the grant-free resources in the resource indication field 105, {P0, α}#2 is then applied to determine the power of the PUSCH transmitting the grant-free resources.

[0059] In some embodiments, the information in the resource indication field is used to indicate which power control parameter set is used directly. For example, each bit in the resource indication field indicates which power control parameter set is used for the corresponding unlicensed resource.

[0060] At this time, the power determined by applying {P0, α}#2 for PUSCH transmission is higher than the power determined by applying {P0, α}#1, thereby improving transmission performance when transmission resources overlap.

[0061] In such an embodiment, the TPC command field may be used to further indicate the closed-loop power control parameter set. In some embodiments, the two open-loop power control parameter sets described above may be associated with the same closed-loop power control parameter set.

[0062] In some embodiments, the DCI may not include a TPC command field. That is, the aforementioned uplink transmission does not need to perform closed-loop power control parameter adjustment.

[0063] Method 2:

[0064] Two closed-loop power control parameter sets TPC#1 and TPC#2 corresponding to different TPC tables are defined. For example, the mapping relationship between the corresponding closed-loop power adjustment amount and the TPC command value in TPC#1 is shown in Table 1 below. The cumulative power adjustment amount refers to the amount by which the transmission power is further adjusted from the last PUSCH. The absolute power adjustment amount refers to the absolute amount of power adjustment, which is independent of the previous closed-loop power adjustment. Specifically, when the TPC command is used to indicate the absolute power adjustment amount and when the two-bit TPC command is "00", it represents a 4dB reduction in transmission power. When the two-bit TPC command is "01", it represents a 1dB reduction in transmission power. When the two-bit TPC command is 11, it indicates a 4dB increase in transmission power.

[0065] Table 1

[0066]

[0067] Correspondingly, the mapping relationship between the closed-loop power adjustment amount and the TPC command value in TPC#2 is shown in Table 2.

[0068] Table 2

[0069]

[0070] TPC#1 corresponds to an embodiment in which the grant-free resources are not occupied by other uplink transmissions. TPC#2 corresponds to an embodiment in which the grant-free resources are already occupied by other uplink transmissions. When a UE receives DCI 101 and identifies that the grant-free resources are occupied in the resource indication field 105, TPC#2 is selected. The power adjustment amount can be determined based on the TPC command corresponding to the UE in the TPC command field 103.

[0071] TPC#2 is configured with a larger power adjustment step size than TPC#1. For the same TPC command (eg, its value), the power adjustment using TPC#2 will be larger than the power adjustment using TPC#1.

[0072] In some embodiments, one of the TPC tables may be defined using only positive step sizes. An example is shown in Table 3. This allows it to be used to increase transmission power when the resource is occupied by other transmissions, or the interference level of the resource is high, or the priority level of transmission on the resource is high, or data is retransmitted on the resource.

[0073] Table 3

[0074]

[0075] In some embodiments, the DCI may use a DCI format for a group common TPC command or a DCI format 2_2. A closed loop indicator in the DCI may be used to indicate which closed loop parameter table is used, and the closed loop parameter table is a TPC table with multiple power adjustment step size candidates or a table with power increase step size candidates.

[0076] In a case where the closed-loop indicator is set to a positive value, a TPC#2 table having a larger power adjustment step size is selected compared to a case where the closed-loop indicator is set to zero or when the closed-loop indicator is not configured for the TPC command.

[0077] In some embodiments, as shown in Table 4, TPC#2 is only an absolute power adjustment. Regardless of whether the cumulative power adjustment mode is configured, when TPC#2 table is selected, the power adjustment is not cumulative. There are two cases:

[0078] - The first case is "accumulative power adjustment mode is not configured", that is, "absolute power adjustment mode is configured". In this case, both TPC#1 and TPC#2 use absolute power adjustment.

[0079] - The second case is "Cumulative power adjustment mode is configured". Even if cumulative power adjustment mode is configured, the absolute power adjustment of TPC#2 is used. So in this case, if TPC#1 is selected, it uses cumulative power adjustment, and the cumulative power adjustment for TPC#1 is based on the cumulative power adjustment of the previous PUSCH. If TPC#2 is selected, absolute power adjustment is used, and the absolute power adjustment for TPC#2 is based on the previous PUSCH power determined by TPC#1.

[0080] Table 4

[0081]

[0082] In some embodiments, the power adjustment step size in TPC#2 is configured by RRC or MAC layer signaling.

[0083] Method 3:

[0084] In the above two methods, more than two power control parameter sets may be defined, and which power control parameter set to use may be determined according to resource overlap conditions.

[0085] For example, taking closed-loop power control as an example, four closed-loop power control parameter sets can be defined: TPC#1, TPC#2, TPC#3 and TPC#4, which correspond to 4 different TPC tables. The resource indication field 105 indicates that each unlicensed resource is used for more than 1 bit. The resource occupancy rate is represented by 2 bits as follows: "00" indicates that the unlicensed resource is not occupied; "01" indicates that the unlicensed resource is occupied, and the occupancy rate is less than 1 / 3; "10" represents that the unlicensed resource is occupied, and the occupancy rate is between 1 / 3 and 2 / 3; "11" represents that the unlicensed resource is occupied, and the occupancy rate is greater than 2 / 3. The relationship between different resource occupancy conditions and power control parameters is shown in Table 5 below.

[0086] Table 5

[0087]

[0088] When the occupied portion of a certain unlicensed resource is high, in order to ensure the reliability of unlicensed service transmission, the increased power should also be high. Therefore, in this mode, the closed-loop power control parameters can be determined according to the occupied portion of the unlicensed resource.

[0089] Method 4:

[0090] Two open-loop power control parameter sets {P0, α}#1 and {P0, α}#2, two closed-loop power control parameter sets TPC#1 and TPC#2 corresponding to different TPC tables, or a combination of two sets of open-loop power control parameters and closed-loop power control parameters, namely {P0, α, TPC}#1 and {P0, α, TPC}#2, can be defined.

[0091] Each TPC command block includes 3 bits, of which 1 bit is used to indicate which power control parameter set is selected (e.g., indicating which TPC table, P0 and α values ​​are selected), and the other 2 bits of the TPC command block are used to indicate the power adjustment value of the closed-loop power control. In such an embodiment, the DCI 101 does not need to include the resource indication field 105.

[0092] Fifth embodiment

[0093] This embodiment describes a method for a UE to determine a power control parameter according to DCI 101.

[0094] If the UE recognizes that the uplink transmission resource allocated by the UE is partially or fully occupied according to the indication of the resource indication field 105 in the DCI 101, the UE may reduce the transmission power on the corresponding uplink transmission resource to zero. When the uplink transmission resource allocated by the UE is not occupied, the UE may adjust the transmission power according to the corresponding TPC command in the TPC command field 103.

[0095] As in Figure 3 As shown in , the area indicated by the dotted box is the occupied or preempted resource indicated by the resource indication field 105. The grid box is the uplink transmission resource originally allocated to the UE. The UE can reduce the transmission power for the overlapping resources to zero. The transmission power for the uplink transmission resources in the non-overlapping area can be one of the following:

[0096] 1. Maintain the original transmission power;

[0097] 2. Maintain the original transmission power on the resources before the overlapping resources; for the resources after the overlapping resources, adjust the transmission power according to the instructions of the corresponding TPC command in DCI 101;

[0098] 3. In all non-overlapping areas, the adjusted transmission power is used according to the instruction of the corresponding TPC command in DCI 101;

[0099] 4. Maintaining the original transmission power on the resources before the overlapping resources and reducing the transmission power to zero for the resources after the overlapping resources; and

[0100] 5. The resources before the overlapping resources are adjusted according to the instruction of the corresponding TPC command in DCI 101, and the transmission power of the resources after the overlapping resources is reduced to zero.

[0101] In some embodiments, one of the aforementioned methods for power transmission in non-overlapping areas may be defined in the specification. In some embodiments, these methods may be determined by a communication device (eg, a base station) and indicated to a terminal (eg, a UE).

[0102] Sixth embodiment

[0103] This embodiment describes a combination of (1) power control based on resource multiplexing and (2) conventional power control.

[0104] Method 1:

[0105] A valid time window is defined for power control based on resource multiplexing. The valid time window can be the duration of the next configured resource after the time point N symbols after the UE receives the DCI. N is a positive integer. Within the valid time window, power adjustment is performed in the manner described in the embodiments of this article. After the valid time window, the power control state returns to the state before receiving the DCI.

[0106] Specifically, if Figure 4 As shown in FIG. 1 , when the transmission power is adjusted according to the accumulated adjustment amount, the initial transmission power of the UE may be "A". During the valid time window, due to transmission multiplexing with other uplink services, the transmission power increases (e.g., increases by 3 dB from A). After the valid time window, the UE may receive a new TPC command instructing it to reduce the transmission power by 3 dB (starting from A). At this time, the UE may adjust the transmission power to "A-3".

[0107] Thus, if the UE receives multiple DCIs within the same valid time window and indicates a transmit power adjustment amount based on the accumulated adjustment amount, subsequent power adjustments within the valid time window are based on the previous transmit power (e.g., not based on the initial transmit power "A").

[0108] Method 2:

[0109] If the transmission power is adjusted according to the accumulated adjustment amount, the power adjustment based on resource multiplexing is effective for subsequent transmissions regardless of whether the next uplink transmission is multiplexed with other uplink services.

[0110] Specifically, if Figure 5As shown in the figure, the original transmission power of the UE is "A". The network side performs power adjustment based on resource multiplexing according to the DCI. The transmission is multiplexed with other uplink services, so the transmission power is increased by 3dB from A, that is, "A+3"dB. The UE then receives a new TPC command instructing it to reduce the transmission by 3dB. At this time, the UE should adjust the transmission power to "A".

[0111] Method 3:

[0112] When adjusting the transmission power according to the accumulated adjustment amount, the power adjustment parameters based on resource multiplexing are maintained separately from the conventional power control adjustment parameters.

[0113] For example, for power adjustment in the presence of other uplink transmissions multiplexed with the resource indication field 105, the previously determined transmission power is "A", and the power adjustment when multiplexing with other uplink transmissions next time is based on the previous transmission power multiplexed with other uplink transmissions. For example, the TPC command indicates an increase of 3dB, and then the transmission power is raised to "A+3" dB. In the case of multiplexing with other uplink transmissions, subsequent power adjustments will be based on the new power "A+3" dB.

[0114] For power adjustment when not multiplexing with other uplink transmissions indicated in the resource indication field 105, the previously determined transmission power is "B" dBm, and the power adjustment when not multiplexing with other uplink transmissions next time is based on the previous transmission power when not multiplexing with other uplink transmissions. For example, the TPC command indicates an increase of 3dB, and then the power is increased to "B+3" dBm. In the case of not multiplexing with other uplink transmissions, subsequent power adjustments will be based on "B+3" dBm.

[0115] Fig. 6A A flow chart of an exemplary method 600A for wireless communication is shown. The method 600A includes, at block 601, indicating power control information based on multiple parameter sets by a communication device via downlink control information (DCI). In some embodiments, the power control information is used to indicate a transmission power on a resource, and the multiple parameter sets are predefined for the resource. At block 603, the method 600A includes indicating a parameter set selected from the multiple parameter sets. The method 600A includes, at block 605, indicating power control information based on the selected parameter set. In some embodiments, the communication node device includes a base station.

[0116] In some embodiments, the plurality of parameter sets include at least one of an open loop power control parameter and a closed loop power control parameter. In some embodiments, the resources may include at least a portion of grant-free transmission resources or at least a portion of grant-based transmission resources.

[0117] In some embodiments, the method 600A further comprises selecting, by the communication device, a parameter set from a plurality of parameter sets based on a state of the resource. In some embodiments, the state of the resource comprises at least one of: an interference level of the resource, a priority level of transmission on the resource, and an occupancy state of the resource.

[0118] In some embodiments, the method 600A further includes defining a radio network temporary identifier (RNTI) for the DCI.

[0119] In some embodiments, the DCI includes a transmission power control (TPC) command field, and the TPC command field includes one or more TPC command blocks. In some embodiments, the method 600A further includes indicating which of the multiple parameter sets is selected by the one or more TPC command blocks. In some embodiments, each of the one or more TPC command blocks may indicate a closed-loop power control parameter corresponding to the user equipment.

[0120] In some embodiments, the DCI includes a resource indication field. Method 600A also includes determining which of the multiple parameter sets to select based on information in the resource indication field. In some embodiments, the bit width of the resource indication field is determined based on the number of unlicensed resources in the predefined time-frequency domain resources to be indicated.

[0121] In some embodiments, the resource indication field has a predetermined number of bits. In some embodiments, the method 600A further comprises configuring a relationship between bits in the resource indication field and the indicated resources by at least one of: radio resource control (RRC) signaling, medium access control (MAC) layer signaling, physical layer signaling, predefined rules. In some embodiments, the method 600A further comprises defining a valid time window for the power control information.

[0122] Figure 6B A flow chart of an exemplary method 600B for wireless communication is shown. The method 600 includes defining (block 602) a plurality of control parameter sets by a communication device. The method 600 includes selecting (block 604) one of the plurality of control parameter sets based on the availability of transmission resources. The method 600B includes indicating power control information using (block 606) downlink control information (DCI) based on the selected one of the control parameter sets. In some embodiments, the communication node device includes a base station.

[0123] In some embodiments, the method 600B further comprises defining a radio network temporary identifier (RNTI) for the DCI. In some embodiments, the method 600B further comprises adjusting the parameter validity time based on a power of a resource multiplex associated with the RNTI.

[0124] In some embodiments, the DCI includes a transmission power control (TPC) command field. The TPC command field may include one or more TPC command blocks. Method 600B may include determining whether to occupy at least some transmission resources based on the one or more TPC command blocks.

[0125] In some embodiments, the one or more TPC commands indicate closed loop power control parameters corresponding to the UE. In some embodiments, the one or more TPC command blocks indicate open loop power control parameters corresponding to the user equipment.

[0126] In some embodiments, the one or more TPC commands indicate power control parameters corresponding to a physical uplink control channel (PUCCH) of the UE. In some embodiments, the one or more TPC command blocks indicate power control parameters corresponding to a physical uplink shared channel (PUSCH) of the UE.

[0127] In some embodiments, the method 600B further comprises determining whether to occupy at least some transmission resources based at least in part on radio resource control (RRC) signaling. In some embodiments, the method 600B further comprises determining whether to occupy at least some transmission resources based at least in part on physical layer signaling. In some embodiments, the method 600B further comprises determining whether to occupy at least some transmission resources based at least in part on medium access control (MAC) layer signaling.

[0128] In some embodiments, the DCI includes a resource indication field. Method 600B includes determining whether to occupy at least some transmission resources based on information in the resource indication field. In some embodiments, the number of bits of the resource indication field is determined based on the number of unlicensed resources to be indicated. In some embodiments, the resource indication field has a predetermined number of bits.

[0129] In some embodiments, the DCI indicates whether at least some transmission resources are occupied within a predefined time-frequency domain resource range. For example, the DCI in the predefined time-frequency domain resource field may indicate that at least some transmission resources are occupied. In some embodiments, the DCI indicates whether at least some transmission resources are occupied in a reference uplink resource (RUR). For example, the DCI in the RUR field may indicate the occupied state of at least some transmission resources.

[0130] Figure 7An example of a wireless communication system to which the technology according to one or more embodiments of the present technology can be applied is shown. The wireless communication system 700 may include one or more base stations (BSs) 705a, 705b, one or more wireless devices (e.g., UEs or terminals) 710a, 710b, 710c, 710d, and an access network 725. The base stations 705a, 705b may provide wireless services to the wireless devices 710a, 710b, 710c, and 710d in one or more wireless sectors. In some embodiments, the base station 705a or 705b includes a directional antenna to generate two or more directional beams to provide wireless coverage in different sectors.

[0131] The access network 725 can communicate with one or more base stations 705a, 705b. In some embodiments, the access network 725 includes one or more base stations 705a, 705b. In some embodiments, the access network 725 is connected to a core network (in the Figure 7 The core network may include one or more service subscription databases to store information related to subscribed wireless devices 710a, 710b, 710c, and 710d. The first base station 705a may provide wireless services based on a first radio access technology, while the second base station 705b may provide wireless services based on a second radio access technology. Depending on the deployment scenario, base stations 705a and 705b may be located at the same location, or may be installed separately on site. The access network 725 may support a variety of different radio access technologies.

[0132] In some implementations, a wireless communication system may include multiple networks using different wireless technologies. A dual-mode or multi-mode wireless device includes two or more wireless technologies that can be used to connect to different wireless networks.

[0133] Figure 8A block diagram representation of a portion of a radio station (e.g., a type of wireless communication node). A radio station 805, such as a base station or terminal (or UE), may include a processor electronics 810, such as a microprocessor, that implements one or more wireless technologies presented in this document. The radio station 805 may include a transceiver electronics 815 to send and / or receive wireless signals through one or more communication interfaces such as an antenna 820. The radio station 805 may include other communication interfaces for transmitting and receiving data. The radio station 805 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some embodiments, the processor electronics 810 may include at least a portion of the transceiver electronics 815. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the radio station 805.

[0134] Some embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program codes, executed by a computer in a network environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact disk (CD), digital versatile disk (DVD), etc. Therefore, computer-readable media may include non-transitory storage media. Typically, program modules may include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer or processor executable instructions, associated data structures, and program modules represent examples of program codes for executing the steps of the methods disclosed herein. A specific sequence of such executable instructions or associated data structures represents an example of corresponding actions for implementing the functions described in these steps or processes.

[0135] Some disclosed embodiments can be implemented as devices or modules using hardware circuits, software or a combination thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components, which are, for example, integrated as a part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application specific integrated circuits (ASICs) and / or as field programmable gate arrays (FPGAs) devices. Some embodiments may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor having an optimized architecture for the operational requirements of digital signal processing associated with the disclosed functions of the present application. Similarly, various components or subcomponents within each module may be implemented in software, hardware or firmware. Connectivity between modules and / or components within a module may be provided using any of connection methods and media known in the art, including but not limited to communications performed over the Internet, wired or wireless networks using appropriate protocols.

[0136] Although this patent document contains many details, these details should not be interpreted as limitations on the scope of any invention or the content that can be claimed, but rather as descriptions of features that can be specific to a particular embodiment of a specific invention. Certain features described in this patent document in the context of separate embodiments may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments or in any suitable sub-combination, respectively. Moreover, although the features may be described above as working in certain combinations and even initially claimed as such, one or more features in the claimed combination may be cut out of the combination in some cases, and the claimed combination may be directed to a sub-combination or a variation of the sub-combination.

[0137] Similarly, although operations are depicted in a particular order in the drawings, this should not be understood as requiring that such operations be performed in the particular order shown or in a continuous order, or that all of the operations shown be performed to achieve the desired results. In addition, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.

[0138] Only some embodiments and examples are described, and other embodiments, enhancements and variations may be made based on what is described and illustrated in this patent document. From the foregoing, specific embodiments of the present invention have been described herein for illustrative purposes, but various modifications may be made without departing from the scope of the present invention. Therefore, the present invention is not subject to restrictions other than the appended claims.

Claims

1. A wireless communication method, comprising: determining, by the communication device, a plurality of parameter sets; as well as The communication device indicates to the terminal through downlink control information DCI that a parameter set selected from the multiple parameter sets is determined to determine a transmission power on a resource, The DCI includes a resource indication field, the resource indication field includes one or two bits, and the one or two bits are used by the terminal to determine which parameter set among multiple parameter sets is selected, wherein at least one parameter set among the multiple parameter sets includes an open-loop power control parameter, Wherein, when the open-loop power control parameter has a first value, the transmission power on the resource has a first power value, and when the open-loop power control parameter has a second value, the transmission power on the resource has a second power value.

2. The method according to claim 1, wherein: The communication device includes a base station.

3. A wireless communication device, comprising: A processor and a memory, wherein the processor is configured to read instructions from the memory to implement the following operations: determining multiple parameter sets; Instructing the terminal to determine the transmission power on a resource by using downlink control information DCI, The DCI includes a resource indication field, the resource indication field includes one or two bits, and the one or two bits are used by the terminal to determine which parameter set among multiple parameter sets is selected, wherein at least one parameter set among the multiple parameter sets includes an open-loop power control parameter, Wherein, when the open-loop power control parameter has a first value, the transmission power on the resource has a first power value, and when the open-loop power control parameter has a second value, the transmission power on the resource has a second power value.

4. The device according to claim 3, wherein: The wireless communication device includes a base station.

5. A wireless communication method, comprising: The terminal receives an indication corresponding to a parameter set selected from a plurality of parameter sets through downlink control information DCI to determine the transmission power on a resource, The DCI includes a resource indication field, the resource indication field includes one or two bits, and the one or two bits are used by the terminal to determine which parameter set among multiple parameter sets is selected, wherein at least one parameter set among the multiple parameter sets includes an open-loop power control parameter, Wherein, when the open-loop power control parameter has a first value, the transmission power on the resource has a first power value, and when the open-loop power control parameter has a second value, the transmission power on the resource has a second power value.

6. The method according to claim 5, wherein: The terminal includes a user equipment UE.

7. A wireless communication device, comprising: A processor and a memory, wherein the processor is configured to read instructions from the memory to implement the following operations: receiving an indication corresponding to a parameter set selected from a plurality of parameter sets through downlink control information DCI to determine a transmission power on a resource, The DCI includes a resource indication field, the resource indication field includes one or two bits, and the one or two bits are used to determine which parameter set among multiple parameter sets is selected. wherein at least one parameter set among the multiple parameter sets includes an open-loop power control parameter, Wherein, when the open-loop power control parameter has a first value, the transmission power on the resource has a first power value, and when the open-loop power control parameter has a second value, the transmission power on the resource has a second power value.

8. The device according to claim 7, wherein: The wireless communication device includes a user equipment UE.

9. A computer readable medium having stored thereon codes which, when executed by a processor, cause the processor to implement the method according to any one of claims 1 to 2 and claims 5 to 6.

Images