JP-7856846-B2 - Power control scheme for simultaneous uplink transmission

JP7856846B2JP 7856846 B2JP7856846 B2JP 7856846B2JP-7856846-B2

Inventors

グオ，シャオロン
ガオ，ボ
ジャン，ヤン
ヤオ，ケ
ジャン，シュジュアン
ルー，ジャオフア

Assignees

中興通訊股▲ふん▼有限公司

Dates

Publication Date: 20260511
Application Date: 20220720

Claims (13)

A method of wireless communication, Receiving a message from the network that indicates one or more sets of power control parameters associated with at least one transmission piece of information by a user device scheduled to simultaneously transmit uplink transmissions, which are fully or partially overlapping within the time domain and associated with individual transmission information, and which are associated with separate transmission information; Based on the message, the determination includes determining the transmission power of at least one of the uplink transmissions, and the determination is: The transmission power of the uplink transmission is limited so as not to exceed the maximum output power associated with the at least one transmission piece of information. When the total transmission power of an uplink transmission exceeds the maximum output power within the transmission duration, at least one scaling factor is determined in order to limit the transmission power of at least one of the uplink transmissions. Includes, A method wherein the at least one scaling factor is determined based on a priority determined based on the message associated with the at least one transmission information .
The method according to claim 1, wherein the uplink transmission comprises at least one of the following: an uplink signal transmission opportunity, an uplink signal repetition, or an uplink signal comprising PUCCH, PUSCH, SRS, or PRACH, the at least one transmission information comprising at least one of the following: information grouping one or more reference signals, a reference signal resource set, a PUCCH resource set, panel-related information, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a beam state, a physical cell index (PCI), TRP-related information, a CORESET pool index, an index of the TCI state at a TCI state code point, a UE capability value, or a UE capability set.
The method according to claim 1, wherein the determination of the transmission power of at least one of the uplink transmissions includes determining the total transmission power of at least one of the uplink transmissions or determining the individual transmission power for each uplink transmission.
Determining the actual value of a power control parameter used to determine the total transmitted power, wherein the actual value is determined as one of the average, sum, weighted average, maximum, or minimum value of the received values of the power control parameter associated with individual transmission information. The method according to claim 3, further comprising determining the individual transmission power based on a plurality of power control parameters associated with the individual transmission information, or distributing the total transmission power to each uplink transmission based on the message associated with at least one of the transmission information.
The network receives another message, associated with specific transmission information, indicating that the transmission power of the uplink transmission does not require scaling. The method according to claim 1, further comprising:
The method according to claim 1, wherein the transmission power of a plurality of uplink transmissions having the same priority is scaled if the sum of the transmission power of an uplink transmission with a higher priority and the transmission power of the plurality of uplink transmissions satisfies a predetermined condition.
The method according to claim 6 , wherein the uplink transmission carries the same uplink control information (UCI) type and is associated with different transmission information.
The power control parameter comprises at least one of the following: a target received power value, a transmission power control (TPC) command, an index of a reference signal for path loss measurement, a modulation and coding scheme, the number of physical resources occupied, a channel format, or a bandwidth, and the message further comprises at least one of the following: a determined transmission power, a weight indication, a default coefficient, a coefficient indication, an indication of transmission information, a measured value of path loss associated with the PL-RS, the number of SRS resource ports, the number of antenna ports, a UE capability value, a predefined value, or an index of a predefined set of values, according to claim 1.
A method of wireless communication, The network transmits messages to user devices that include at least one set of power control parameters. The network receives transmissions from the user device that overlap within the time domain and are associated with individual transmission information, wherein at least one of the transmissions has a transmission power that is determined and scaled based on the message associated with at least one transmission information, so as to have a value that does not exceed the maximum output power associated with at least one transmission information , The transmission power of at least one of the transmissions is limited so as not to exceed the maximum output power associated with the transmission information. The transmission power is determined based on at least one scaling factor for at least one of the transmissions in order to limit the transmission power of at least one of the transmissions. A method wherein the at least one scaling factor is determined based on a priority determined based on the message associated with the at least one transmission information .
The method according to claim 9 , further comprising transmitting to the user device another message, associated with specific transmission information, indicating that the transmission power of a particular transmission does not require scaling.
The method according to claim 9, wherein the transmission power of a plurality of uplink transmissions having the same priority is scaled if the sum of the transmissions having a higher priority and the transmission power of the plurality of uplink transmissions satisfies a predetermined condition.
A communication device comprising at least one processor configured to implement the method described in any one of claims 1 to 8 .
A communication device comprising at least one processor configured to implement the method described in any one of claims 9 to 11.

Description

(Technical field) This patent document generally relates to systems, devices, and techniques for wireless communication. (background) Wireless communication technology is driving the world towards an increasingly connected and networked society. The rapid growth of wireless communication and technological advancements are leading to a growing demand for capacity and connectivity. Other aspects such as energy consumption, device cost, spectral efficiency, and latency are also crucial in meeting the needs of various communication scenarios. Compared to existing wireless networks, next-generation systems and wireless communication techniques need to provide support for an increased number of users and devices. Figure 1 illustrates a schematic diagram showing the power distribution and scaling scheme implemented in response to exceeding the maximum output power over a certain transmission duration. Figure 2 illustrates a schematic diagram of simultaneous uplink transmission from multiple panels of a user device in the case of multiple TRPs (transmit/receive points) between cells. Figure 3 shows an illustrative schematic diagram illustrating power control for simultaneous uplink transmission based on several implementations of the disclosed technology. Figure 4 illustrates a transmission power determination scheme in the case of STxMP, based on several implementations of the disclosed technology. Figure 5 illustrates an illustrative schematic diagram showing the transmission power when the maximum output power per panel is defined, and the sum of the maximum output power for panel-1 and the maximum output power for panel-2 is equal to the maximum output power for the carrier component. Figure 6 illustrates an illustrative schematic diagram showing the transmission power when the maximum output power per panel is not specified. Figure 7 illustrates an illustrative schematic diagram showing the transmission power when the maximum output power per panel is defined, and the sum of the maximum output power for panel-1 and the maximum output power for panel-2 exceeds the maximum output power for the carrier component. Figures 8 and 9 illustrate flowcharts showing exemplary methods of wireless communication based on several implementations of the disclosed technology.Figures 8 and 9 illustrate flowcharts showing exemplary methods of wireless communication based on several implementations of the disclosed technology. Figure 10 shows an embodiment of wireless communication, including a base station (BS) and user equipment (UE), based on several implementations of the disclosed technology. Figure 11 shows an embodiment of a partial block diagram of the apparatus based on several implementations of the disclosed technology. (Detailed explanation) The disclosed technology provides implementations and examples of a power control scheme for simultaneous uplink transmission. Power control aims to compensate for path loss, overcome shadow fading, and suppress interference by adjusting the transmission power of signals from the UE or base station. Power control can be divided into closed-loop based and open-loop based, depending on whether the transmitter (e.g., UE) adjusts the transmission power based on information from the receiver (base station). Essentially, closed-loop and open-loop power control work together within the NR system. For example, in closed-loop and open-loop power control, the UE is considered open-loop when it adjusts the transmission power according to an estimated value of path loss, and in closed-loop power control, the UE adjusts the transmission power according to TPC commands from the base station. In current NR systems, the UE determines the transmission power of the uplink signal based on at least one of the following: target received power, path loss compensation, power control commands, bandwidth, etc. Meanwhile, a maximum output power value is defined for different UE classes and cases, and the UE's transmission power is not permitted to exceed this defined value. As an example, in NR TS38.213, the PUSCH transmission power P PUSCH, b, f, c (i, j, q d , l) in a PUSCH transmission opportunity i on the active UL BWP b of the carrier f of serving cell c is determined as follows, using a parameter set configuration with index j and a PUSCH power control adjustment state with index l. In equation (1), P CMAX, f, c (i) is the maximum output power with respect to the carrier of the serving cell, P O_PUSCH is the target received power configured by the base station, α is the coefficient of path loss compensation, PL is the estimated value of path loss associated with a reference signal with index q d , Δ TF is determined based on the modulation and coding scheme (MCS), and f is the transmission power adjustment command received within the scheduling DCI. When the determined transmission power of a signal exceeds the maximum value ( PCMAX ), the UE is required to scale it so that it does not exceed the max