Overlay transmission to improve system performance

Abstract

Methods, systems, and devices for wireless communication are described. A network entity may transmit, to a first user equipment (UE), control signaling that schedules a first set of resources for the first transmission. The network entity may send overlay control information to the first UE, a second UE, or both, the overlay control information indicating an overlay of a second transmission and the first transmission during a portion of the first set of resources. In some examples, the network entity may superimpose the first transmission and the second transmission via an enhancement layer and a base layer of the superimposed signal. In some examples, the network entity may overlay the first transmission and the second transmission based on a bit allocation. In some examples, the network entity may overlay the first transmission and the second transmission via separate layers of the overlay signal. The network entity may transmit the superimposed signal to the first UE and the second UE.

Description

[0001] Cross-reference

[0002] This patent application claims priority to U.S. Patent Application No. 18 / 057,203, entitled "SUPERPOSITION TRANSMISSION TO IMPROVE SYSTEM PERFORMANCE," filed on November 18, 2022, by Wu et al., which is assigned to the assignee of the present application and is hereby incorporated by reference in its entirety. Technical Field

[0003] The following relates to wireless communication, including superposition transmission to improve system performance. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and so on. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (such as Long-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include one or more base stations, each of which supports wireless communication for communication devices, which may be referred to as User Equipment (UE). Summary of the Invention

[0005] The described techniques relate to improved methods, systems, devices, and apparatuses that support superimposed transmissions to enhance system performance. For example, the described techniques enable a network entity to superimpose a first transmission for a first user equipment (UE) and a second transmission for a second UE to support preemption and cancellation. For example, the network entity may send control signaling scheduling a first set of resources for the first transmission to the first UE. The network entity may send superimposed control information to the first UE, the second UE, or both, the superimposed control information indicating the superimposition of the second transmission and the first transmission during a portion of the first set of resources. In some examples, the network entity may superimpose the first transmission and the second transmission via an enhanced layer and a base layer of the superimposed signal. In some examples, the network entity may superimpose the first transmission and the second transmission based on bit allocation. In some examples, the network entity may superimpose the first transmission and the second transmission via separate layers of the superimposed signal. The network entity may send the superimposed signal to the first UE and the second UE.

[0006] A method for wireless communication at a UE is described. The method may include: receiving control signaling scheduling a first transmission via a first set of resources; receiving superimposed control information at least in part based on a second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first set of resources; monitoring the first set of resources for the first transmission based on the control signaling; and decoding a superimposed signal including the first transmission and the second transmission based on the superimposed control information to receive the first transmission via the first set of resources.

[0007] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus: to receive control signaling scheduling a first transmission via a first set of resources; to receive superimposed control information at least in part based on a second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first set of resources; to monitor the first set of resources for the first transmission based on the control signaling; and to decode a superimposed signal including the first transmission and the second transmission based on the superimposed control information to receive the first transmission via the first set of resources.

[0008] Describes another apparatus for wireless communication at a UE. The apparatus may include: means for receiving control signaling scheduling a first transmission via a first resource set; means for receiving superposition control information at least in part based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; means for monitoring the first resource set for the first transmission based on the control signaling; and means for decoding a superposition signal including the first transmission and the second transmission based on the superposition control information to receive the first transmission via the first resource set.

[0009] Describes a non-transitory computer-readable medium storing code for wireless communication at a UE. The code may include instructions executable by a processor to: receive control signaling scheduling a first transmission via a first resource set; receive superposition control information at least in part based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; monitor the first resource set for the first transmission based on the control signaling; and decode a superposition signal including the first transmission and the second transmission based on the superposition control information to receive the first transmission via the first resource set.

[0010] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: receiving, in the superposition control information, an indication of whether to transmit the first transmission via an enhancement layer or a base layer of the superposition signal, wherein receiving the first transmission is based on the indication.

[0011] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: receiving, in the superposition control information, an indication that a first portion of the superposition signal is allocated for the first transmission and a second portion of the superposition signal is allocated for the second transmission, wherein receiving the first transmission is based on receiving the indication.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first portion corresponds to a set of least significant bits of the superposition signal, and the second portion corresponds to a set of most significant bits of the superposition signal.

[0013] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first portion corresponds to a set of most significant bits of the superposition signal, and the second portion corresponds to a set of least significant bits of the superposition signal.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the first transmission may include operations, features, components, or instructions for: decoding the enhancement layer of the superimposed signal that includes an enhancement layer and a base layer, where the base layer is associated with the second transmission.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the first transmission may include operations, features, components, or instructions for: decoding the base layer of the superimposed signal that includes an enhancement layer and a base layer, where the enhancement layer is associated with the second transmission.

[0016] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the first transmission may include operations, features, components, or instructions for: decoding the superimposed signal based on the second transmission having a higher priority than the first transmission to obtain the first transmission from the base layer of the superimposed signal.

[0017] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: receiving, in the superimposed control information, an indication that the first transmission corresponds to a first transmission layer of the superimposed signal and the second transmission corresponds to a second transmission layer of the superimposed signal, where the superimposed control information indicates one or more parameters associated with the second transmission layer, and where decoding the superimposed signal includes: and decoding the superimposed signal based on the one or more parameters associated with the second transmission layer to obtain the first transmission from the first transmission layer of the superimposed signal.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the superimposed control information indicates the time and frequency position of the superimposed signal, a power parameter associated with the superimposed signal, a modulation and coding scheme associated with the superimposed signal, a channel identifier associated with the superimposed signal, a demodulation reference signal identifier, or a combination thereof.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: sending a capability message to a network entity, where the capability message indicates the ability to decode the enhancement layer of the superimposed signal, and where receiving the superimposed control information may be based on the capability message, and where the superimposed control information indicates the superimposition of the second transmission.

[0020] A method for wireless communication at a network entity is described. The method may include: sending control signaling scheduling a first transmission to a first UE via a first resource set; sending superposition control information to the first UE, a second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and sending a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0021] An apparatus for wireless communication at a network entity is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: send control signaling scheduling a first transmission to a first UE via a first resource set; send superposition control information to the first UE, a second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and send a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0022] Another apparatus for wireless communication at a network entity is described. The apparatus may include: means for sending control signaling scheduling a first transmission to a first UE via a first resource set; means for sending superposition control information to the first UE, a second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and means for sending a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0023] Describes a non-transitory computer-readable medium storing code for wireless communication at a network entity. The code may include instructions executable by a processor to: send control signaling for scheduling a first transmission to a first UE via a first resource set; send superposition control information to the first UE, a second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and send a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the superposition signal may include operations, features, components, or instructions for: sending the second transmission via a base layer of the superposition signal; and sending the first transmission via an enhanced layer of the superposition signal.

[0025] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the superposition signal may include operations, features, components, or instructions for: sending the second transmission via an enhanced layer of the superposition signal; and sending the first transmission via a base layer of the superposition signal.

[0026] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the superposition control information indicates a time and frequency position of the superposition signal, a base layer or enhanced layer associated with the first transmission, a power parameter associated with the superposition signal, a modulation and coding scheme associated with the superposition signal, a channel identifier associated with the superposition signal, a demodulation reference signal identifier associated with the superposition signal, or a combination thereof.

[0027] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the superposition signal may include operations, features, components, or instructions for: sending the superposition signal according to a first modulation and coding scheme for the first transmission and a second modulation and coding scheme for the second transmission.

[0028] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: sending the superposition control information, the superposition control information including an indication of the first modulation and coding scheme, the second modulation and coding scheme, or both.

[0029] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the superimposed signal may include operations, features, components, or instructions for: sending the superimposed signal that includes the first transmission as one of a base layer or an enhanced layer based on one or more parameters associated with the first UE, and includes the second transmission as one of the base layer or the enhanced layer based on one or more parameters associated with the second UE.

[0030] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: sending the superimposed control information that includes an indication of the base layer and the enhanced layer.

[0031] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the one or more parameters include a priority level, path loss, channel quality, device capabilities, or any combination thereof.

[0032] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: sending the superimposed control information that includes an indication that a first portion of the superimposed signal may be allocated for the first transmission and a second portion of the superimposed signal may be allocated for the second transmission.

[0033] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: mapping the first transmission to a set of the least significant bits of the superimposed signal; and mapping the second transmission to a set of the most significant bits of the superimposed signal, wherein sending the superimposed signal may be based on the mapping.

[0034] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for: mapping the first transmission to a set of the most significant bits of the superimposed signal; and mapping the second transmission to a set of the least significant bits of the superimposed signal, wherein sending the superimposed signal may be based on the mapping.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the superimposed signal may include operations, features, components, or instructions for: sending a first transmission layer of the superimposed signal that includes the first transmission; and sending a second transmission layer of the superimposed signal that includes the second transmission.

[0036] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: transmitting the overlay control information, the overlay control information including an indication that the first transmission corresponds to the first transmission layer and the second transmission corresponds to the second transmission layer, the overlay control information indicating one or more parameters associated with the first transmission layer, the second transmission layer, or both.

[0037] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: receiving a capabilities message, the capabilities message indicating the ability to decode an enhancement layer of the overlay signal, wherein transmitting the overlay signal may be based on the capabilities message. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Examples of wireless communication systems that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0039] Figure 2 Examples of wireless communication systems that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0040] Figure 3 Examples of overlay schemes that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0041] Figure 4 Examples of process flows that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0042] Figure 5 and Figure 6 Block diagrams of devices that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0043] Figure 7 Block diagrams of communication managers that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0044] Figure 8 Diagrams of systems that include devices that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0045] Figure 9 and Figure 10 Block diagrams of devices that support overlay transmission for improving system performance in accordance with one or more aspects of the present disclosure are illustrated.

[0046] Figure 11A block diagram of a communication manager that supports superposition transmission to improve system performance, in accordance with one or more aspects of the present disclosure.

[0047] Figure 12 A diagram of a system that includes a device that supports superposition transmission to improve system performance, in accordance with one or more aspects of the present disclosure.

[0048] Figures 13 to 16 A flowchart that illustrates a method that supports superposition transmission to improve system performance, in accordance with one or more aspects of the present disclosure. Detailed Description

[0049] In some wireless communication systems, a network entity may convey ultra-reliable low-latency communication (URLLC) traffic to one or more user equipments (UEs). In such systems, to meet the transmission constraints of URLLC traffic, the network entity may preempt or cancel lower-priority transmissions (e.g., such as enhanced mobile broadband (eMBB) transmissions) to support URLLC transmissions. For example, the network entity may schedule one or more resources for a lower-priority transmission for a first UE. In such examples, the network entity may also have a URLLC transmission for a second UE. Thus, in cases where there are not sufficient amounts of resources available to schedule both the URLLC transmission and the lower-priority transmission, the network entity may preempt or cancel the lower-priority transmission to send the URLLC transmission. However, the preemption and cancellation of the lower-priority transmission may cause a portion or all of the lower-priority transmission to be dropped, thereby reducing throughput, increasing latency, and degrading the user experience in the wireless communication system.

[0050] The techniques described herein may enable the network entity to superimpose a URLLC transmission and a lower-priority transmission on the scheduled resources to support preemption or cancellation of the lower-priority transmission, thereby reducing latency in the wireless communication system. For example, the network entity may send signaling for resources scheduled for a first transmission (e.g., an eMBB transmission) to a first UE. Additionally, the network entity may have a second transmission (e.g., a URLLC transmission) to be sent to a second UE. In such examples, the network entity may determine to superimpose the second transmission and the first transmission on overlapping resources and send a superimposed signal to the first UE and the second UE.

[0051] In some examples, the network entity may send a second transmission on a base layer of a superimposed signal and a first transmission on an enhancement layer of the superimposed signal. For example, the network entity may encode the first and second transmissions into a superimposed signal including a base layer and an enhancement layer. The base layer may be decodable independently of the enhancement layer. The enhancement layer may be decoded by removing the base layer from the enhancement layer. In such examples, the network entity may send superimposed control information to a first UE, the superimposed control information indicating one or more parameters that can be used to decode the enhancement layer. In some other examples, the network entity may send the first transmission via the base layer of the superimposed signal and the second transmission via the enhancement layer of the superimposed signal. In such examples, the network entity may send superimposed control information to a second UE such that the second UE can decode the enhancement layer of the superimposed signal to receive the second transmission. In some examples, the network entity may dynamically or semi-statically determine which transmission (e.g., the first transmission or the second transmission) to send via the base layer of the superimposed signal. In such examples, the network entity may indicate the determination via the superimposed control information.

[0052] In some examples, the network entity may dynamically or semi-statically determine which transmission (e.g., the first transmission or the second transmission) to send via the base layer of the superimposed signal. In such examples, the network entity may indicate the determination via the superimposed control information (e.g., to one or both of the two receiving UEs). In some examples, the network entity may send the superimposed signal according to bit allocation. For example, the network entity may send the first transmission via one or more most significant bits of the superimposed signal, while the second transmission may be sent via the least significant bit of the superimposed signal, and vice versa. In such examples, the network entity may indicate the bit allocation to the first UE, the second UE, or both via the superimposed control information. In some other examples, the network entity may send the first and second transmissions on separate multiple-input multiple-output (MIMO) layers of the superimposed signal. In such examples, the network entity may send superimposed control information to indicate one or more parameters such that each UE can decode the superimposed signal and receive the corresponding transmission. In this way, the network entity may send both the first and second transmissions to the corresponding UEs, thereby reducing latency due to preemption and cancellation in a wireless communication system.

[0053] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are also illustrated in the context of superimposition schemes and process flows. Aspects of the present disclosure are further illustrated and described by reference to apparatus diagrams, system diagrams, and flowcharts related to superimposed transmissions that improve system performance.

[0054] Figure 1An example of a wireless communication system 100 that supports superposition transmission to improve system performance in accordance with one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies including future systems and radio technologies not explicitly mentioned herein.

[0055] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other names. In some examples, the network entities 105 and the UEs 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UEs 115 may support signal communication according to one or more radio access technologies (RATs).

[0056] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated. The UEs 115 described herein may be capable of supporting communication with various types of devices (such as other UEs 115 or network entities 105 as Figure 1 shown).

[0057] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) can be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, a device, an equipment, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node can be the UE 115. As another example, the node can be the network entity 105. As yet another example, a first node can be configured to communicate with a second node or a third node. In one aspect of this example, the first node can be the UE 115, the second node can be the network entity 105, and the third node can be the UE 115. In another aspect of this example, the first node can be the UE 115, the second node can be the network entity 105, and the third node can be the network entity 105. In other aspects of this example, the first node, the second node, and the third node can be different from these examples. Similarly, references to the UE 115, the network entity 105, the device, the equipment, the computing system, etc. can include the disclosure of the UE 115, the network entity 105, the device, the equipment, the computing system, etc. as nodes. For example, the disclosure that the UE 115 is configured to receive information from the network entity 105 also discloses that the first node is configured to receive information from the second node.

[0058] In some examples, the network entity 105 can communicate with the core network 130 or with each other or both. For example, the network entity 105 can communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to the S1, N2, N3, or other interface protocols). In some examples, the network entity 105 can communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to the X2, Xn, or other interface protocols). In some examples, the network entity 105 can communicate with each other via the midhaul communication link 162 (e.g., according to the midhaul interface protocol) or the fronthaul communication link 168 (e.g., according to the fronthaul interface protocol) or any combination thereof. The backhaul communication link 120, the midhaul communication link 162, or the fronthaul communication link 168 can be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. The UE 115 can communicate with the core network 130 via the communication link 155.

[0059] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, Node B, evolved Node B (eNB), next generation Node B or giga Node B (either of which may be referred to as gNB), 5G NB, next generation eNB (ng-eNB), home Node B, home evolved Node B or other suitable terms). In some examples, the network entity 105 (e.g., base station 140) may be implemented in an integrated (e.g., monolithic, stand-alone) base station architecture that may be configured to utilize a protocol stack physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as base station 140).

[0060] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., disaggregated base station architecture, disaggregated RAN architecture) that may be configured to utilize a protocol stack physically or logically distributed between two or more network entities 105 (such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) or a virtualized RAN (vRAN) (e.g., cloud RAN (C-RAN)). For example, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., near real-time RIC (near RT RIC), non-real-time RIC (non RT RIC)), a service management and orchestration (SMO) 180 system or any combination thereof. The RU 170 may also be referred to as a radio head, intelligent radio head, remote radio head (RRH), remote radio unit (RRU) or transmit receive point (TRP). One or more components of the network entity 105 in the disaggregated RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the disaggregated RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0061] The functional split between the CU 160, DU 165, and RU 170 is flexible and can support different functions depending on which functions are performed at the CU 160, DU 165, or RU 170 (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof). For example, a functional split of the protocol stack can be employed between the CU 160 and the DU 165 such that the CU 160 can support one or more layers of the protocol stack and the DU 165 can support one or more different layers of the protocol stack. In some examples, the CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functions and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 can be connected to one or more DU 165s or RU 170s, and one or more DU 165s or RU 170s can host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, media access control (MAC) layer) functions and signaling, and can each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack can be employed between the DU 165 and the RU 170 such that the DU 165 can support one or more layers of the protocol stack and the RU 170 can support one or more different layers of the protocol stack. The DU 165 can support one or more different cells (e.g., via one or more RU 170s). In some cases, the functional split between the CU 160 and the DU 165 or between the DU 165 and the RU 170 can be within a protocol layer (e.g., some functions of a protocol layer can be performed by one of the CU 160, DU 165, or RU 170, while other functions of that protocol layer are performed by a different one of the CU 160, DU 165, or RU 170). The CU 160 can be further functionally split into a CU control plane (CU-CP) and a CU user plane (CU-UP) function. The CU 160 can be connected to one or more DU 165s via an intermediate transport communication link 162 (e.g., F1, F1-c, F1-u), and the DU 165 can be connected to one or more RU 170s via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, the intermediate transport communication link 162 or the fronthaul communication link 168 can be implemented according to the interfaces (e.g., channels) between the layers of the protocol stack, which are supported by the respective network entities 105 communicating via such communication links.

[0062] In some wireless communication systems (e.g., wireless communication system 100), the infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB node 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via the supported access and backhaul links (e.g., backhaul communication link 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by the DU 165 of the coupled IAB donor. The IAB-MT may include a separate antenna set for relaying communication with the UE 115, or may share the same antenna (e.g., of the RU 170 of the IAB node 104) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the split RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0063] In cases where the techniques described herein are applied in the context of a split RAN architecture, one or more components of the split RAN architecture may be configured to support superimposed transmission for improving system performance as described herein. For example, some operations described as being performed by the UE 115 or network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the split RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO180).

[0064] The UE 115 may include or may be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" may also be referred to as a unit, station, terminal, or client, etc. The UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 may include or may be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances, vehicles, meters, etc.

[0065] The UE 115 described herein may be capable of communicating wirelessly with various types of devices such as other UE 115s that may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc., as Figure 1 shown.

[0066] The UE 115 and the network entity 105 may communicate wirelessly with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion (e.g., bandwidth part (BWP)) of an RF spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any part (e.g., entity, sub-entity) of the network entity 105. For example, the terms "transmit", "receive", or "communicate" when referring to the network entity 105 may refer to any part of the network entity 105 of the RAN (e.g., base station 140, CU 160, DU 165, RU 170) communicating with another device (e.g., directly or via one or more other network entities 105).

[0067] The signal waveform transmitted via a carrier can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element can refer to the resource of a symbol period (e.g., the duration of a modulated symbol) and a subcarrier. In this case, the symbol period and the subcarrier spacing can be inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the decoding rate of the modulation scheme, or both), such that a relatively high number of resource elements (e.g., during the transmission duration) and a relatively high-order modulation scheme can correspond to a relatively high communication rate. Wireless communication resources can refer to a combination of RF spectrum resources, time resources, and space resources (e.g., spatial layers or beams), and the use of multiple space resources can increase the data rate or data integrity for communication with UE 115.

[0068] The time interval for the network entity 105 or UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can refer to, for example, the sampling period T s = 1 / (Δf max ·N f ) seconds, where Δf max can represent the supported subcarrier spacing, and N f can represent the supported discrete Fourier transform (DFT) size. The time interval of the communication resources can be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0069] Each frame can include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot can have the same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into a certain number of time slots. Alternatively, each frame can include a variable number of time slots, and the number of time slots can depend on the subcarrier spacing. Each time slot can include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, a time slot can be further divided into a plurality of mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period can be associated with one or more (e.g., N f ) sampling periods. The duration of the symbol period can depend on the subcarrier spacing or the operating frequency band.

[0070] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0071] According to various techniques, carriers can be used to multiplex physical channels for communication. For example, one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels for signaling via a downlink carrier. The control region of a physical control channel (e.g., a control resource set (CORESET)) can be defined by a set of symbol periods and can extend across the system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more of the UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate can refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space sets can include: a common search space set configured to transmit control information to multiple UEs 115, and a UE-specific search space set for transmitting control information to a specific UE 115.

[0072] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support URLLC. The UE 115 can be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communication can include private communication or group communication and can be supported by one or more services (such as push-to-talk, video, or data). Support for ultra-reliable, low-latency functions can include prioritization of services, and such services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency can be used interchangeably herein.

[0073] In some examples, UE 115 may be configured to support direct communication with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 performing D2D communication in a group may be within the coverage area 110 of a network entity 105 (e.g., base station 140, RU 170), and the network entity may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, where each UE 115 transmits to each of the other UEs 115 in the group. In some examples, the network entity 105 may facilitate the scheduling of resources for D2D communication. In some other examples, D2D communication may be performed between UEs 115 without involving the network entity 105.

[0074] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity for managing access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity for routing packets or interconnecting to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions, such as the mobility, authentication, and bearer management of UEs 115 served by a network entity 105 (e.g., base station 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, and the user plane entity may provide IP address allocation and other functions. The user plane entity may be connected to the IP services 150 of one or more network operators. The IP services 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet switched streaming services.

[0075] The wireless communication system 100 can operate using one or more frequency bands that can be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or the decimeter band because, in terms of length, the wavelength range is approximately from one decimeter to one meter. UHF waves can be blocked or redirected by buildings and environmental features, which can be referred to as clutter, but these waves can be sufficient to penetrate structures so that a macro cell can serve a UE 115 located indoors. Compared with communications using smaller frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, communications using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0076] The wireless communication system 100 can utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 can use an unlicensed frequency band (such as the 5 GHz industrial, scientific, and medical (ISM) band) to employ licensed-assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology. When operating using an unlicensed RF spectrum band, devices such as the network entity 105 and the UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, operation using an unlicensed frequency band can be combined with a component carrier operating using a licensed frequency band based on a carrier aggregation configuration (e.g., LAA). Operations using unlicensed spectrum can include downlink transmissions, uplink transmissions, peer-to-peer (P2P) transmissions, or device-to-device (D2D) transmissions, etc.

[0077] The network entity 105 (e.g., the base station 140, the RU 170) or the UE 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, MIMO communications, or beamforming. The antennas of the network entity 105 or the UE 115 can be located within one or more antenna arrays or antenna panels, which can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays can be co-located at an antenna assembly, such as at an antenna tower. In some examples, the antennas or antenna arrays associated with the network entity 105 can be located at different geographical locations. The network entity 105 can include an antenna array that has a set of antenna ports in multiple rows and columns that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 can include one or more antenna arrays, which can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel can support RF beamforming for signals transmitted via the antenna ports.

[0078] The network entity 105 or the UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may be transmitted, for example, by the transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). The different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include: single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0079] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., the network entity 105, the UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals conveyed via the antenna elements of an antenna array such that some signals propagating along a particular direction relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals conveyed via the antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other direction).

[0080] In some cases of the wireless communication system 100, the network entity 105 may utilize a preemption and cancellation mechanism for URLLC transmission on a channel (e.g., such as the Uu interface). For example, relative to lower-priority transmissions (e.g., such as eMBB transmissions), URLLC traffic may have less tolerance for latency and higher reliability constraints. To meet the URLLC traffic constraints, the network entity may schedule URLLC transmissions in a relatively timely manner (e.g., relative to the time at which the URLLC transmission is to be sent). Thus, when there is not enough amount of resources available for URLLC transmissions and one or more lower-priority transmissions, the wireless communication system 100 (e.g., the NR system) may utilize preemption and cancellation to quickly schedule URLLC traffic.

[0081] For example, when the network entity 105 has a URLLC transmission to be scheduled on previously allocated resources (e.g., for eMBB transmission), the network entity 105 may pre-empt one or more lower-priority transmissions in the downlink. In such examples, the network entity 105 may schedule resources that overlap with the previously scheduled resources (e.g., puncture the previously scheduled resources) and schedule the URLLC transmission in the overlapping resources. Additionally, the network entity 105 may send a pre-emption indication (PI) (e.g., via downlink control information (DCI) of format 2_1 scrambled with a radio network temporary identifier (RNTI)) to indicate to the UE 115 associated with the lower-priority transmission that such transmission has been pre-empted. Based on receiving the PI, the UE 115 may remove the bits received from the overlapping resources (e.g., clear the bits received in the pre-empted resources in the buffer).

[0082] In the case of an uplink transmission, based on receiving a scheduling request for a URLLC transmission from the first UE 115, the network entity 105 may allocate resources for the first UE 115 to perform a URLLC transmission in an overlapping portion of resources that have already been allocated for another transmission (e.g., eMBB) at the second UE 115. Accordingly, the network entity may send a cancellation indication (CI) (e.g., via DCI of format 2_4 scrambled with an RNTI) to the second UE 115, the cancellation indication (CI) indicating the cancellation of the transmission (e.g., eMBB transmission). However, the pre-emption and cancellation of lower-priority transmissions may cause a part or all of the lower-priority transmissions to be discarded, thereby reducing throughput, increasing latency, and degrading the user experience in a wireless communication system.

[0083] In some examples of the wireless communication system 100, the network entity 105 may support superimposed transmission (e.g., overlapping transmission involving multiple transmitters, receivers, or both). For example, the network entity 105 may transmit to two UEs 115 using the same resources (e.g., which may be referred to as multi-user superimposed transmission (MUST)). In such examples, the network entity 105 may communicate with a first UE 115 and a second UE 115, where the first UE 115 may be physically located farther from the network entity 105 compared to the second UE 115 (e.g., closer to the edge of the serving cell) (e.g., the first UE 115 is farther from the network entity 105 while the second UE 115 is closer to the network entity). Thus, to perform superimposed transmission, the network entity may allocate a higher transmission power and a lower spectral efficiency to the first UE 115 (e.g., the farther UE), and a lower transmission power and a higher spectral efficiency to the second UE 115 (e.g., the closer UE). In an illustrative example, the network entity may perform adaptive power allocation and perform non-Gray mapping for the superimposed signal (e.g., QAM 1 +QAM 2 ) modulation scheme. In another example, the network entity may perform adaptive power allocation and use Gray mapping (e.g., QAM 1 +e jφ ·QAM 2 ) modulation scheme. In some other examples, the network entity may perform non-adaptive power allocation and utilize a bit allocation modulation scheme for the superimposed signal.

[0084] The techniques described herein may enable the network entity 105 to superimpose URLLC transmissions and lower-priority transmissions on scheduled resources to support preemption or cancellation of lower-priority transmissions, thereby reducing latency in the wireless communication system. For example, the network entity 105 may send signaling to the first UE 115 scheduling resources for a first transmission (e.g., an eMBB transmission). Additionally, the network entity may have a second transmission (e.g., a URLLC transmission) to be sent to the second UE 115. In such examples, the network entity 105 may determine to superimpose the second transmission and the first transmission on overlapping resources and send a superimposed signal to the first UE 115 and the second UE 115.

[0085] In some examples, network entity 105 may send a second transmission on a base layer of a superimposed signal and a first transmission on an enhanced layer of the superimposed signal. In such examples, network entity 105 may send superimposed control information to first UE 115 that indicates one or more parameters that can be used to decode the enhanced layer. In some other examples, network entity 105 may send the first transmission via the base layer of the superimposed signal and the second transmission via the enhanced layer of the superimposed signal. In such examples, network entity 105 may send superimposed control information to second UE 115 such that second UE 115 can decode the enhanced layer of the superimposed signal to receive the second transmission.

[0086] In some examples, network entity 105 may dynamically or semi-statically determine which transmission (e.g., the first transmission or the second transmission) to send via the base layer of the superimposed signal. In such examples, network entity 105 may indicate the determination and one or more parameters that enable decoding of the enhanced layer to first UE 115, second UE 115, or both via the superimposed control information. In some examples, network entity 105 may send the superimposed signal based on bit allocation. For example, network entity 105 may send the first transmission on one or more most significant bits of the superimposed signal, while the second transmission may be sent via the least significant bits of the superimposed signal, and vice versa. In such examples, network entity 105 may indicate the bit allocation to first UE 115 and second UE 115 via the superimposed control information. In some other examples, network entity 105 may send the first transmission and the second transmission on separate MIMO layers of the superimposed signal. In such examples, network entity 105 may send superimposed control information to indicate one or more parameters such that each UE 115 can decode the superimposed signal and receive the corresponding transmission. In this way, network entity 105 may send both the first transmission and the second transmission to the corresponding UE 115, thereby reducing latency due to preemption and cancellation in a wireless communication system.

[0087] Figure 2 An example of a wireless communication system 200 that supports superimposed transmissions that improve system performance in accordance with one or more aspects of the present disclosure is illustrated. Wireless communication system 200 may implement aspects of wireless communication system 100 of reference Figure 1 or may be implemented by aspects of the wireless communication system. For example, wireless communication system 200 may include network entity 105-a, UE 115-a, and UE 115-b, which may be examples of the corresponding devices described herein with reference to Figure 1 description.

[0088] In some cases of the wireless communication system 200, the network entity 105-a may communicate one or more high-priority (e.g., URLLC) transmissions with one or more UEs 115 (e.g., UE 115-a and UE 115-b). To meet the constraints of URLLC transmissions (e.g., low latency and rapid scheduling), the network entity 105-a may preempt or cancel a scheduled transmission for UE 115-a (e.g., an eMBB transmission) to support a higher-priority (e.g., URLLC) transmission for UE 115-b. For example, the network entity 105-a may schedule one or more resources (e.g., the first resource set 225) for a first transmission for UE 115-a (e.g., such as a lower-priority transmission or an eMBB transmission). In such cases, the network entity 105-a may also schedule a second transmission for UE 115-b (e.g., such as a higher-priority packet or a URLLC transmission) (e.g., the second resource set 230 that may be scheduled for the second transmission). Thus, in cases where there is not a sufficient amount of resources available to schedule both the first transmission and the second transmission, the network entity 105-a may preempt or cancel the first transmission in order to schedule and transmit the second transmission (e.g., via the second resource set 230 that at least partially overlaps with the first resource set 225). However, in such cases, the preemption and cancellation of the lower-priority transmission (e.g., via the first resource set 225) may cause a portion or all of the lower-priority transmission to be discarded, thereby reducing the throughput to UE 115-a, increasing the latency between UE 115-a and the network entity 105-a, and degrading the user experience at UE 115-a.

[0089] The techniques described herein may enable the network entity 105-a to schedule a superimposed signal 220 (e.g., a superimposed transmission) to support preemption or cancellation of the first transmission (e.g., a lower-priority transmission). In this way, the network entity 105-a may be able to transmit the superimposed signal 220 including the first transmission (e.g., lower-priority eMBB traffic) via the first resource set 225 while also transmitting the second transmission (e.g., higher-priority URLLC traffic) in the overlapping resources (e.g., the second resource set 230) without preempting the already-scheduled transmission. The two transmissions (e.g., eMBB and URLLC) may be superimposed based on one or more techniques described herein.

[0090] In some examples, network entity 105-a may (e.g., by default or as indicated in one or more standard documents) send a second transmission via the base layer of the superimposed signal 220 while sending a first transmission via the enhanced layer of the superimposed signal 220. In some examples, network entity 105-a may (e.g., by default or as indicated in one or more standard documents) send a first transmission via the base layer of the superimposed signal 220 while sending a second transmission via the enhanced layer of the superimposed signal 220. In some examples, network entity 105-a may determine which transmission (e.g., eMBB or URLLC transmission) is the base layer of the superimposed signal 220 and may indicate that determination to UE115-a, UE 115-b, or both dynamically or semi-statically (e.g., via DCI, MAC CE, RRC signaling, etc.). Such techniques and signaling (e.g., sending the first and second transmissions via the enhanced and base layers) may be further described herein with reference to Figure 2 Further description.

[0091] In some examples, network entity 105-a may utilize bit allocation based on a MUST scheme for the superimposed signal 220. In such examples, network entity 105-a may map the first transmission to the least significant bits of the modulation constellation and the second transmission to the most significant bits of the modulation constellation, and vice versa. Such techniques and signaling may be further described herein with reference to Figure 3 for further description. In some other examples, the network entity may determine to prohibit the use of a composite constellation (e.g., bit allocation or base layer and enhanced layer superposition). That is, similar to MU-MIMO, the two transmissions may be sent in overlapping resources. In such cases, UE 115 may know the transmission parameters of the interfering layer for interference cancellation. For example, network entity 105-a may send the first and second transmissions in separate spatial layers (e.g., MIMO layers) in one or more overlapping resources. In such cases, UE 115 may receive one or more transmission parameters to perform interference cancellation on the MIMO layers. Such techniques and signaling may be described herein with reference to Figure 4 for description. Depending on the technique used by network entity 105-a, network entity 105-a may or may not signal the superimposed control information 215 to the intended recipient of the first or second transmission.

[0092] In some specific implementations of the wireless communication system 200, the network entity 105-a may send a first transmission and a second transmission to the UE 115 via the base layer and the enhanced layer of the superimposed signal 220 to support preemption or cancellation. For example, the network entity 105-a may send control signaling 205-a for scheduling a first resource set for the first transmission (e.g., eMBB transmission) to the UE 115-a. In such examples, the network entity 105-a may schedule a second transmission (e.g., URLLC transmission) for the UE 115-b (e.g., via at least a portion of the first resource set). The network entity 105-a may determine to send the first transmission and the second transmission via the base layer and the enhanced layer of the superimposed signal 220 instead of preempting the first transmission to support the second transmission. Thus, the network entity 105-a may send control signaling 205-b indicating a second resource set for receiving the second transmission to the UE 115-b, where the second resource set may at least partially overlap with the first resource set, and the superimposed signal 220 may be sent via the overlapping resources.

[0093] The network entity 105-a may send the first transmission and the second transmission via the base layer and the enhanced layer based on the capabilities of the UE 115. For example, the UE 115-a may send a UE capability message 210-a that indicates the ability to perform interference cancellation and decode the enhanced layer of the superimposed signal. Similarly, in some examples, the UE 115-b may send a UE capability message 210-b indicating such capabilities.

[0094] In one specific implementation, the network entity 105-a may (e.g., by default or as defined in the standard) send the second transmission (e.g., URLLC transmission) via the base layer of the superimposed signal 220 and may send the first transmission via the enhanced layer of the superimposed signal 220. In such examples, the network entity 105-a may map the bits of the second transmission to the positions of the most significant bits in the modulation constellation of the base layer (e.g., of a composite constellation). Additionally, in such examples, the network entity 105-a may send superimposed control information 215-a to the UE 115-a that indicates the first transmission is sent via the enhanced layer of the superimposed signal 220. The network entity 105-a may include one or more decoding parameters in the superimposed control information 215-a such that the UE 115-a can decode the enhanced layer of the superimposed signal and receive the first transmission.

[0095] For example, to receive the enhancement layer of the superimposed signal, UE 115-a may perform interference cancellation to remove the base layer of the superimposed signal 220. That is, based on receiving the superimposed signal 220, UE 115-a may decode, reconstruct, and cancel the base layer (e.g., the second transmission) from the superimposed signal 220 in order to decode the first transmission from the enhancement layer. To complete such interference cancellation, network entity 105-a may send superimposed control information 215-a to UE 115-a to indicate the time and frequency position of the superimposed signal 220, the power scaling factor of the superimposed signal 220, the modulation order of the second transmission, the modulation and coding scheme (MCS) of the second transmission, the scrambling identifier (ID) of the data channel for the second transmission, the scrambling ID for the demodulation reference signal (DMRS) associated with the second transmission, or a combination thereof.

[0096] In addition, since the second transmission is sent via the base layer of the superimposed signal 220, network entity 105-b may prohibit sending the superimposed control information 215-b to UE 115-b (e.g., because UE 115-b may not be aware of the transmission in the enhancement layer). That is, since UE 115-b receives the second transmission via the base layer of the superimposed signal, UE 115-b may decode the base layer of the superimposed signal 220 without performing interference cancellation via the enhancement layer.

[0097] Since the base layer has relatively high reliability (e.g., higher reliability than the enhancement layer), network entity 105-a may send the second transmission via the base layer of the superimposed signal 220 such that the second transmission (e.g., higher-priority URLLC traffic) is more likely to be received by UE 115-b. In addition, since decoding the base layer may not involve interference cancellation of the enhancement layer, network entity 105-a may send the second transmission via the base layer such that UE 115-b may decode the second transmission (e.g., higher-priority traffic) without incurring additional processing complexity or latency due to interference cancellation (e.g., decoding more quickly).

[0098] To send the first transmission via the enhancement layer, network entity 105-a may use the MCS implemented for the base layer for the enhancement layer. For example, network entity 105-a may use a non-Gray mapping modulation scheme for both the base layer and the enhancement layer such that UE 115-a may be prohibited from reprocessing a part of the first transmission during interference cancellation (e.g., not reinterleaving). In some other examples, network entity 105-a may modify the MCS between the enhancement layer and the base layer such that network entity 105-a may use Gray mapping for the enhancement layer (e.g., and non-Gray mapping for the base layer). In some other examples, network entity 105-a may use a lower modulation order for the enhancement layer compared to the base layer.

[0099] In some examples, the network entity 105-a may include in the superposition control information 215-a destined for the UE 115-a which MCS can be used for the enhanced layer of the superposition signal 220. For example, the network entity 105-a may determine whether to use Gray mapping or non-Gray mapping, whether to reduce the modulation order of the enhanced layer, or both, and indicate this determination to the UE 115-a (e.g., via RRC signaling or as indicated in the superposition control information 215-a in, for example, DCI or MAC CE) such that the UE 115-a can correctly process the superposition signal 220 (e.g., correctly determine the transport block size and demodulation).

[0100] In some examples, the network entity 105-a may indicate the superposition control information 215-a to the UE 115-a after transmitting the superposition signal 220. In such examples, the UE 115-a may reprocess the superposition signal 220 (e.g., the superposition part or the enhanced layer) to receive the first transmission. In some examples, the network entity 105-a may transmit the superposition control information 215-a to the UE 115-a before transmitting the superposition signal 220 such that the UE 115-a can process the superposition signal 220 as indicated.

[0101] In some examples, the network entity 105-a may transmit a second transmission via the enhanced layer of the superposition signal 220 and a first transmission via the base layer of the superposition signal 220 (e.g., by default or as defined in the standard). In such an implementation, since the UE 115-b receives the second transmission via the enhanced layer of the superposition signal 220, the network entity 105-a may send the superposition control information 215-b to the UE 115-b. Thus, since the UE 115-a receives the first transmission via the base layer of the superposition signal 220, the network entity 105-a may prohibit indicating the superposition control information 215-a to the UE 115-a. In this way, the UE 115-a may experience transparent operation (e.g., may receive the initially expected first transmission via a part of the first resource).

[0102] When network entity 105-a determines that a second transmission can be superimposed after a first transmission has been scheduled and the second transmission may not be a higher-priority transmission (e.g., URLLC service), network entity 105-a can transmit the second transmission via the enhanced layer of the superimposed signal and transmit the first transmission via the base layer. For example, network entity 105-a can schedule the first transmission (e.g., an eMBB transmission) via control signaling 205-a. Network entity 105-a can also schedule a second transmission for UE 115-b, where the priority of the second transmission is less than or equal to the priority of the first transmission (e.g., another eMBB transmission). In some examples, network entity 105-a can determine to superimpose the first transmission and the second transmission, where based on the priority of the second transmission being less than or equal to the priority of the first transmission, the first transmission can be transmitted via the base layer of the superimposed signal 220, and the second transmission can be transmitted via the enhanced layer of the superimposed signal 220. In such embodiments, UE 115-b can decode, reconstruct, and cancel the base layer (e.g., perform interference cancellation to remove the base layer from the superimposed signal) and decode the enhanced layer from the superimposed signal after cancellation to receive the second transmission.

[0103] In some embodiments, network entity 105-a can dynamically determine which transmission (e.g., the first transmission and the second transmission) to transmit via the base layer of the superimposed signal 220. Network entity 105-a can dynamically determine which transmission to transmit via the base layer of the superimposed signal based on the following: the priorities associated with the first transmission and the second transmission, the path loss of the channel between network entity 105-a and the corresponding UE 115, the channel quality index (CQI) of the channel between network entity 105-a and the corresponding UE 115, the capabilities of UE 115-a (e.g., whether UE 115-a has interference cancellation capabilities), the capabilities of UE 115-b (e.g., whether UE 115-b has interference cancellation capabilities), or a combination thereof.

[0104] For example, network entity 105-a may determine to send a first transmission via the enhanced layer of the superimposed signal 220 and a second transmission via the base layer of the superimposed signal 220. In such examples, network entity 105-a may send superimposed control information 215-a (e.g., DCI) indicating the determination and one or more parameters to UE 115-a, such that UE 115-a may perform interference cancellation via the base layer and decode the enhanced layer to receive the first transmission. Alternatively, if network entity 105-a determines to send the first transmission via the base layer of the superimposed signal 220 and the second transmission via the enhanced layer, then network entity 105-a may send superimposed control information 215-b (e.g., DCI) indicating the determination and one or more parameters to UE 115-b, such that UE 115-b may perform interference cancellation via the base layer and decode the enhanced layer to receive the second transmission.

[0105] In some examples, network entity 105-a may send superimposed control information 215 indicating the determination to both UE 115-a and UE 115-b. In some cases, when the superimposed control information 215 is intended for two UEs 115, network entity 105-a may include the respective RNTIs configured for each UE 115 in the superimposed control information 215, such that the UEs 115 can be able to distinguish the corresponding parts of the superimposed control information 215.

[0106] In some cases, network entity 105-a may also dynamically determine which of the multiple transmissions is to be included in the superimposed signal 220. For example, in addition to communicating with UEs 115-a and 115-b, network entity 105-a may also communicate with one or more UEs 115 ( Figure 2 not shown in). Thus, network entity 105-a may allocate resources for the first transmission (e.g., eMBB) to UE 115-a and resources for a third transmission (e.g., eMBB) to a third UE 115. In such examples, network entity 105-a may schedule the second transmission (e.g., URLLC) for UE 115-b on the overlapping resources of the first transmission or the third transmission. That is, network entity 105-a may dynamically determine which of the transmissions of the third UE 115 or UE 115-a is to be included in the superimposed signaling based on the capabilities of UE 115-a and the third UE 115 (e.g., whether the UE 115 is capable of interference rejection combining (IRC)).

[0107] For example, if UE 115-a indicates via UE capability message 210-a that it is capable of performing interference cancellation and decoding the enhanced layer of the superimposed signal, while a third UE 115 indicates via UE capability message 210 that it is not capable of performing interference cancellation or decoding the enhanced layer of the superimposed signal, then network entity 105-a may (e.g., due to the lack of capability of the third UE 115) determine that a first transmission associated with UE 115-a is to be superimposed. That is, network entity 105-a may determine that a first transmission associated with UE 115-a (e.g., a UE with IRC capability) is to be superimposed with a second transmission.

[0108] In some specific implementations, network entity 105-a may determine which transmission to send via the base layer of superimposed signal 220 and may semi-statically configure UE 115 accordingly (e.g., via RRC signaling). For example, network entity 105-a may indicate to UE 115-a and UE 115-b via RRC signaling which transmission to send via the base layer of the superimposed signal and may accordingly maintain communication with UE 115-a and UE 115-b.

[0109] Figure 3 An example of a superimposition scheme 300 that supports superimposed transmissions to improve system performance in accordance with one or more aspects of the present disclosure is illustrated. Superimposition scheme 300 may implement aspects of or be implemented by wireless communication systems 100 and 200 as described herein with reference to Figure 1 and Figure 2 described. For example, superimposition scheme 300 may be implemented by a network entity, which may be an example of network entity 105 described herein.

[0110] Superimposition scheme 300 may support superimposing a first transmission for a first UE (e.g., a first transmission such as UE 115-a) and a second transmission for a second UE (e.g., a second transmission such as UE 115-b) into a superimposed signal 320, which may be an example of superimposed signal 220 described herein with reference to Figure 2 described. Superimposition scheme 300 may include one or more operations performed by a network entity to superimpose the first transmission and the second transmission to generate superimposed signal 320.

[0111] In some specific implementations of superimposition scheme 300, the network entity may be based on what is described herein with reference to Figure 2One or more of the described techniques are used to determine a first transmission (e.g., eMBB) and a second transmission via the enhancement layer and the base layer of the superimposed signal 320. Thus, at 305-a and 305-b respectively, the network entity can decode and scramble the first transmission and the second transmission. At 310-a and 310-b respectively, the network entity can map the first transmission to a modulation scheme and the second transmission to a modulation scheme according to the techniques described herein (e.g., via non-Gray decoding or Gray decoding in the constellation 330 for the enhancement layer transmission and mapping to the most significant bits of the base layer constellation 330 for the base layer transmission). At 315, the network entity can allocate power to the first transmission and the second transmission according to one or more parameters (e.g., the power parameter α). In some examples, the power allocated to the transmission via the base layer may be greater than the power allocated to other transmissions via the enhancement layer (e.g., to improve the reliability of the transmission via the base layer). At 325, the network entity can superimpose the first transmission and the second transmission to generate the superimposed signal 320.

[0112] In some examples, the network entity can superimpose the first transmission and the second transmission according to bit allocation. For example, after performing decoding and scrambling on the first transmission and the second transmission, the network entity can map the bits of the first transmission and the second transmission to a modulation scheme. In a system with a quadrature amplitude modulation (QAM)-based scheme (e.g., such as the constellation 330), the network entity can map the bits of one of the first transmission or the second transmission to the most significant bits of the modulation symbol, while the bits of the other transmission are mapped to the least significant bits of the modulation symbol. As an illustrative example, if a 64QAM scheme is used, the network entity can map the two most significant bits of the constellation to one transmission and the four least significant bits of the constellation to the other transmission. In another illustrative example, the constellation 330 can be an example of a 16QAM scheme. Thus, the network entity can map the two most significant bits of the constellation 330 to one transmission (e.g., 00) and the two least significant bits of the constellation 330 to the other transmission (e.g., 00).

[0113] In some examples, the network entity can (e.g., by default or as defined in the standard) allocate the bits of the second transmission (e.g., URLLC traffic) to the most significant bits of the modulation scheme and map the bits of the first transmission (e.g., eMBB traffic) to the least significant bits of the modulation scheme. In some other examples, the network entity can dynamically determine which transmission to map to the most significant bits and the least significant bits. In such examples, the network entity can indicate the determination to the first UE, the second UE, or both via superimposed control information (e.g., such as the superimposed control information 215).

[0114] In some examples, a network entity may utilize a modulation order different from (e.g., higher than) the modulation order initially scheduled or configured for a first transmission for the superimposed signal 320. For example, the network entity may have scheduled the first transmission to use a quadrature phase shift keying (QPSK) modulation scheme. However, based on determining that the first transmission and the second transmission are to be superimposed, the network entity may use a QAM scheme (e.g., a 16QAM scheme such as where there are two more bits per modulation symbol for the second transmission). In such examples, the transport block size of the first transmission (and the transport block size determination by the receiving UE) may remain the same during the superimposition of the second transmission in the overlapping resources.

[0115] In some examples, the network entity may use the scheduled (e.g., initial or intended) modulation scheme for the first transmission as the modulation scheme for generating the superimposed signal 320 in a second set of resources where superimposition occurs. For example, the network entity may have determined to use a QAM scheme (e.g., a 64QAM scheme) for the first transmission. In such examples, the network entity may maintain (e.g., use) the QAM modulation scheme (e.g., 64QAM initially scheduled for the first transmission) for the superimposed signal 320 in the second set of resources, where the network entity may allocate the least significant bits or the most significant bits of the QAM scheme for the second transmission. In some cases, the network entity may apply the first modulation scheme to generate the first transmission. If the network entity determines to superimpose the first transmission and the second transmission, the network entity may use the same modulation scheme to generate the superimposed signal. In such examples, the network entity may determine (e.g., based on the modulation and coding scheme selection for the superimposed signal) whether to map the bits of the second transmission to the most significant bits or the least significant bits of the constellation 330.

[0116] If the network entity uses the modulation scheme initially assigned for the first transmission to generate the superimposed signal in the second set of resources, the network entity may maintain the transport block size for the first transmission (e.g., the transport block size for the first transmission may remain the same as initially scheduled). In such cases, the UE 115 receiving the first transmission may receive the bits assigned for the second transmission (e.g., punctured for it). Or in some examples, the transport block size determination for the first transmission may be changed (e.g., for all or part of the resources assigned for the first transmission that are assigned for the second transmission), and a lower modulation order may be used for the TB size determination for the second set of resources where the first transmission and the second transmission are superimposed.

[0117] In some examples, a network entity may signal one or more parameters to a UE via superimposed control information such that each UE can decode a superimposed signal 320 based on a determined bit allocation and receive a corresponding transmission. For example, the superimposed control information may indicate to a second UE associated with a second transmission one or more scrambling IDs (e.g., a downlink data channel scrambling ID), a generated DMRS sequence, or a combination thereof. Similarly, the network entity may send an indication to a first UE associated with a first transmission of which modulation scheme to use, whether the modulation scheme changes from a scheduled MCS to a different MCS (e.g., from an initially scheduled QAM to QPSK), a bit allocation (e.g., which bits correspond to which transmission), the MCS of the second transmission, a redundancy version, or a combination thereof, such that the UE associated with the first transmission can successfully decode the superimposed signal and receive the first transmission, thereby improving the performance of receiving corresponding superimposed portions (e.g., the first transmission and the second transmission) at the first UE and the second UE.

[0118] For example, the network entity may send, via superimposed control information, IDs for downlink data channel scrambling and DMRS sequence generation to the second UE after transmitting the superimposed signal. Additionally, the network entity may indicate via the superimposed control information whether the modulation scheme changes from an initially scheduled modulation scheme to a different modulation scheme, a bit allocation, or a combination thereof. Further, the network entity may indicate one or more parameters related to the second transmission, such as a redundancy version, a modulation and coding scheme, such that the first UE can use them to improve the performance of receiving the first transmission.

[0119] Figure 4 An example of a process flow 400 that illustrates superimposed transmission supporting improved system performance in accordance with one or more aspects of the present disclosure is shown. The process flow 400 may implement or be implemented by aspects of the wireless communication system 100, the wireless communication system 200, and the superimposed scheme 300 with reference to Figures 1 to 3 For example, the process flow 400 may include UE 115-c, UE 115-d, and the network entity 105-b, which may be examples of corresponding devices described herein with reference to Figures 1 to 3 In the following description of the process flow 400, operations may be performed in an order different from the order shown. Particular operations may also be excluded from the process flow 400, or other operations may be added to the process flow 400. Additionally, although some operations or signaling are shown as occurring at different times for discussion purposes, these operations may actually occur simultaneously.

[0120] At 405-a and 405-b, UE 115-c, UE 115-d, or both may send a capability message that indicates the ability to decode an enhancement layer of a superimposed signal. The capability message may be one as described herein with reference toFigure 2 An example of the described ability message 210-b. At 410, the network entity 105-b may send control signaling scheduling a first transmission (e.g., such as an eMBB transmission) via a first resource set. At 415, the network entity 105-b may schedule a second transmission (e.g., such as a URLLC transmission) for the UE 115-d and determine to superimpose the first transmission and the second transmission rather than pre-empt the first transmission. In such examples, the network entity 105-b may send control signaling scheduling a second resource set to the UE 115-d, where the second resource set may at least partially overlap with the first resource set.

[0121] In some embodiments, the network entity 105-b may determine whether to pre-empt the first transmission (e.g., a previously scheduled transmission) or schedule a superimposed transmission. For example, the network entity 105-b may determine to pre-empt the first transmission rather than perform the superimposition of the first transmission and the second transmission. The network entity 105-b may determine to pre-empt or cancel the first transmission to support the second transmission or determine to superimpose the first transmission and the second transmission based on: resource availability, the priorities of the first transmission and the second transmission, path loss, CQI, the modulation order of the first transmission, or a combination thereof.

[0122] At 420, the network entity 105-b may superimpose the first transmission and the second transmission to generate a superimposed signal. The superimposed signal may be an example of the superimposed signal 220 or the superimposed signal 320. In some examples, the network entity 105-b may determine to superimpose the first transmission and the second transmission on the enhancement layer and the base layer of the superimposed signal based on the UE capabilities indicated via the ability messages at 405-a and 405-b. In such examples, the network entity 105-b may superimpose the signals according to the techniques described herein with reference to Figure 2 In some other examples, the network entity 105-b may determine to superimpose the first transmission and the second transmission based on bits. For example, the network entity 105-b may allocate a first portion of the superimposed signal for the first transmission and a second portion of the superimposed signal for the second transmission (e.g., the most significant bits or the least significant bits) according to the techniques described herein with reference to Figure 3 described techniques.

[0123] In some examples, network entity 105-b may determine to superimpose a first transmission and a second transmission on separate layers of a superimposed signal (e.g., separate MIMO layers). For example, at 410 and 415, network entity 105-b may schedule a first transmission in a first resource set and may later schedule a second resource set that overlaps some or all of the first resource set. That is, the two transmissions may have overlapping time resources and frequency resources. Thus, network entity 105-b may determine to superimpose the two transmissions via different MIMO layers such that UE 115-c and UE 115-d may receive the first transmission and the second transmission respectively via different layers of the superimposed signal (e.g., different layers are intended for different UEs). In such examples, network entity 105-b may not manipulate the combined constellation of the two transmissions. Additionally, network entity 105-b may assign different power levels to different MIMO layers.

[0124] At 425-a and 425-b, network entity 105-b may transmit superimposed control information that indicates the superimposition of the second transmission and the first transmission during at least a portion of the first resource set (e.g., during a portion of the overlapping resources). For example, if network entity 105-b superimposes the first transmission and the second transmission via an enhanced layer and a basic layer of a superimposed signal at 420, network entity 105-b may transmit the superimposed control information to UE 115-c, UE 115-d, or both according to the techniques referenced herein Figure 2 described. Alternatively, if network entity 105-b superimposes the first transmission and the second transmission based on bit allocation at 420, network entity 105-b may transmit the superimposed control information according to the techniques referenced herein Figure 3 described.

[0125] If network entity 105-b superimposes the first transmission and the second transmission via separate MIMO layers at 420, network entity 105-b may transmit to both UE 115-c and UE 115-d superimposed control information that indicates that the first transmission corresponds to a first transmission layer (e.g., a first MIMO layer), the second transmission corresponds to a second transmission layer (e.g., a second MIMO layer), and indicates one or more parameters associated with decoding the transmission layers. In such examples, network entity 105-b may transmit a superimposed control information message (e.g., similar to a preemption indication) at 430 before or after transmitting the superimposed signal (e.g., via DCI).

[0126] In some examples, the network entity 105-b may indicate, via superposition control information, one or more parameters associated with an interference layer (e.g., a second transmission) to the UE 115-c (e.g., the UE that receives the first transmission), such that the UE 115-c may perform interference cancellation on the second transmission (e.g., the second MIMO layer) and decode the first transmission. The one or more parameters may include the time and frequency resource locations of the superposition signal, the MCS of the second transmission (e.g., to be used in interference cancellation of the second MIMO layer), one or more IDs for DMRS sequence initialization for the second transmission, the DMRS port index of the second transmission, downlink data channel scrambling for the second transmission, one or more redundancy version parameters, transport block size determination, overhead indication, or a combination thereof, such that the UE 115-c may perform interference cancellation on the second MIMO layer (e.g., the interference layer) and decode the superposition signal. For example, the UE 115-c may remove the interference layer (e.g., the second MIMO layer) from the received superposition signal via successive interference cancellation (SIC) and decode the remainder of the signal to receive the desired transmission (e.g., the first transmission).

[0127] In addition, the network entity 105-b may indicate, via superposition control information, one or more parameters associated with the first transmission to the UE 115-d, such that the UE 115-d may perform interference cancellation on the first transmission (e.g., the first MIMO layer) and decode the second transmission. The one or more parameters may include the resource allocation of the first transmission, the DMRS configuration of the first transmission (e.g., the ID of the DMRS sequence, the DMRS port index, or both), one or more scrambling IDs of the first transmission, or a combination thereof. In such examples (e.g., examples using separate MIMO layers), the network entity 105-b may send superposition control information to both the UE 115-c and the UE 115-d via the DCI that schedules the second transmission, where the network entity 105-b may use a DCI format that is configured to include interference layer information (e.g., one or more parameters).

[0128] Network entity 105-b may send superposition control information (e.g., an indication) to the second UE 115-d in the DCI scheduling the second transmission. For example, network entity 105-b may indicate to the second UE 115-d parameters related to the first transmission so that the second UE 115-d can perform interference cancellation. These parameters may include resource allocation of the first transmission, DMRS-related configuration, one or more scrambling-related configurations, etc. In such cases, network entity 105-b may use DCI (e.g., information used by UE 115-c and UE 115-d to cancel the interference layer and decode the desired transmission) that is formatted to carry interference layer information so that each UE 115 can decode the corresponding transmission. In some other examples, network entity 105-b may send superposition control information via a separate DCI message, where the separate DCI message may be sent when scheduling the second transmission (e.g., when transmitting the DCI scheduling the second transmission).

[0129] In some cases, if network entity 105-b determines to pre-empt the first transmission to support the second transmission, network entity 105-b may send superposition control information indicating such determination. That is, the superposition control information may be an extension of the pre-emption indication such that it indicates whether pre-emption or superposition may occur.

[0130] At 430, network entity 105-b may send a superposition signal to UE 115-c and UE 115-d via a resource set that partially overlaps with the first resource set, where the superposition signal includes at least a portion of the first transmission and the second transmission. For example, network entity 105-b may send the first transmission and the second transmission via the enhanced layer and the basic layer of the superposition signal according to the techniques described herein with reference to Figure 2 In some examples, network entity 105-b may send the first transmission and the second transmission via the superposition signal based on bit allocation according to the techniques described herein with reference to Figure 3 In some other examples, network entity 105-b may send the first transmission and the second transmission via separate MIMO layers (e.g., a first transmission layer and a second transmission layer) of the superposition signal according to the techniques described herein with reference to Figure 5 At 435, UE 115-c and UE 115-d may monitor the resource set for the superposition signal. At 440, UE 115-c and UE 115-d may decode the superposition signal based on the superposition control information to receive the first transmission and the second transmission. For example, if network entity 105-b superimposes the first transmission and the second transmission via the enhanced layer and the basic layer of the superposition signal at 420, UE 115 may, according to the techniques described herein with reference to

[0131] Figure 2 ​Decode the superimposed signal using the described techniques. Additionally or alternatively, if network entity 105-b superimposes the first transmission and the second transmission at 420 based on bit allocation, UE 115-c and UE 115-d may decode the superimposed signal according to the techniques referenced herein Figure 3 described techniques.

[0132] If network entity 105-b superimposes the first transmission and the second transmission via separate MIMO layers at 420, UE 115-c and UE 115-d may decode the superimposed signal based on one or more parameters indicated in the superimposition control information at 425-a and 425-b. For example, UE 115-c may use one or more parameters of the second transmission indicated in the superimposition control information to decode, reconstruct, and cancel the second transmission layer from the superimposed signal, and decode the first transmission layer to receive the first transmission. Similarly, UE 115-d may use one or more parameters of the first transmission to decode, reconstruct, and cancel the first transmission layer from the superimposed signal, and decode the second transmission layer to receive the second transmission. In the case where network entity 105-b transmits the superimposition control after the superimposed signal, UE 115 may reprocess the overlapping part of the superimposed signal to decode the corresponding transmission. For example, UE 115-c may remove the interfering layer (e.g., the second MIMO layer) from the superimposed signal via SIC, and decode the remaining part of the signal based on one or more parameters indicated via the superimposition control information to obtain the desired transmission (e.g., the first transmission). Similarly, UE 115-d may remove the interfering layer (e.g., the first MIMO layer) from the superimposed signal via SIC, and decode the remaining part of the signal to obtain the second transmission.

[0133] In this way, network entity 105-b may superimpose the first transmission and the second transmission based on a composite constellation with power adaptation (e.g., according to the first MUST category) as described herein Figure 2 described. Alternatively, network entity 105-b may superimpose the first transmission and the second transmission according to a regular constellation with bit allocation (e.g., according to the second MUST category) as described herein Figure 3 described. In some examples, network entity 105-b may superimpose the first transmission and the second transmission according to a MIMO type superimposition (e.g., according to the third MUST category) that performs superimposed transmission in different layers as described herein Figure 4 described.

[0134] Figure 5FIG. 500 is a block diagram of a device 505 that illustrates superposition transmission in support of enhanced system performance in accordance with one or more aspects of the present disclosure. The device 505 may be an example of aspects of the UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0135] The receiver 510 may provide components for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to superposition transmission for enhanced system performance). The information may be passed to other components of the device 505. The receiver 510 may utilize a single antenna or an array of multiple antennas.

[0136] The transmitter 515 may provide components for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to superposition transmission for enhanced system performance). In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or an array of multiple antennas.

[0137] The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or their various components may be examples of components for performing aspects of superposition transmission for enhanced system performance as described herein. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or components may support methods for performing one or more of the functions described herein.

[0138] In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof or components may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof configured to or otherwise supporting components for performing the functions described in the present disclosure. In some examples, the processor and the memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0139] Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code executed by a processor (e.g., implemented as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured or otherwise supporting components for performing the functions described in this disclosure).

[0140] In some examples, the communication manager 520 may be configured to use or otherwise cooperate with the receiver 510, the transmitter 515, or both to perform various operations (e.g., receive, obtain, monitor, output, transmit). For example, the communication manager 520 may receive information from the receiver 510, convey information to the transmitter 515, or integrate in combination with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0141] According to examples disclosed herein, the communication manager 520 may support wireless communication at a UE. For example, the communication manager 520 may be configured to or otherwise support components for receiving control signaling scheduling a first transmission via a first resource set. The communication manager 520 may be configured to or otherwise support components for receiving superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set, based at least in part on the second transmission having a higher priority than the first transmission. The communication manager 520 may be configured to or otherwise support components for monitoring the first resource set for the first transmission based on the control signaling. The communication manager 520 may be configured to or otherwise support components for decoding a superposition signal including the first transmission and the second transmission to receive the first transmission via the first resource set based on the superposition control information.

[0142] By including or configuring a communication manager 520 according to examples described herein, a device 505 (e.g., a processor controlling the receiver 510, the transmitter 515, the communication manager 520, or combinations thereof or otherwise coupled thereto) may support techniques for superimposing a first transmission and a second transmission to support preemption or cancellation, which may result in more efficient utilization of communication resources.

[0143] Figure 6FIG. 600 is a block diagram of a device 605 that illustrates superposition transmission in support of improved system performance in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0144] The receiver 610 may provide components for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to superposition transmission for improved system performance). The information may be passed to other components of the device 605. The receiver 610 may utilize a single antenna or an array of multiple antennas.

[0145] The transmitter 615 may provide components for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to superposition transmission for improved system performance). In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or an array of multiple antennas.

[0146] The device 605 or its various components may be examples of components for performing aspects of superposition transmission for improved system performance as described herein. For example, the communication manager 620 may include a scheduling component 625, a superposition component 630, a monitoring component 635, a decoding component 640, or any combination thereof. The communication manager 620 may be an example of aspects of the communication manager 520 as described herein. In some examples, the communication manager 620 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, convey information to the transmitter 615, or integrate in combination with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0147] According to an example as disclosed herein, a communication manager 620 may support wireless communication at a UE. A scheduling component 625 may be configured to or otherwise support components for receiving control signaling scheduling a first transmission via a first resource set. An overlay component 630 may be configured to or otherwise support components for receiving overlay control information at least in part based on a second transmission having a higher priority than the first transmission, the overlay control information indicating an overlay of the second transmission and the first transmission during at least a portion of the first resource set. A monitoring component 635 may be configured to or otherwise support components for monitoring the first resource set for the first transmission based on the control signaling. A decoding component 640 may be configured to or otherwise support components for decoding an overlay signal including the first transmission and the second transmission based on the overlay control information to receive the first transmission via the first resource set.

[0148] Figure 7 Block diagram 700 illustrates a communication manager 720 supporting overlay transmission to improve system performance in accordance with one or more aspects of the present disclosure. The communication manager 720 may be an example of aspects of the communication manager 520, the communication manager 620, or both as described herein. The communication manager 720 or its various components may be examples of components for performing various aspects of overlay transmission to improve system performance as described herein. For example, the communication manager 720 may include a scheduling component 725, an overlay component 730, a monitoring component 735, a decoding component 740, a bit allocation component 745, a transmission layer component 750, a UE capability component 755, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0149] According to an example as disclosed herein, a communication manager 720 may support wireless communication at a UE. A scheduling component 725 may be configured to or otherwise support components for receiving control signaling scheduling a first transmission via a first resource set. An overlay component 730 may be configured to or otherwise support components for receiving overlay control information at least in part based on a second transmission having a higher priority than the first transmission, the overlay control information indicating an overlay of the second transmission and the first transmission during at least a portion of the first resource set. A monitoring component 735 may be configured to or otherwise support components for monitoring the first resource set for the first transmission based on the control signaling. A decoding component 740 may be configured to or otherwise support components for decoding an overlay signal including the first transmission and the second transmission based on the overlay control information to receive the first transmission via the first resource set.

[0150] In some examples, the overlay component 730 may be configured to or otherwise support a component for receiving an indication in the overlay control information as to whether to send the first transmission via the enhancement layer or the base layer of the overlay signal, wherein receiving the first transmission is based on the indication.

[0151] In some examples, the bit allocation component 745 may be configured to or otherwise support a component for receiving an indication in the overlay control information that a first portion of the overlay signal is allocated for the first transmission and a second portion of the overlay signal is allocated for the second transmission, wherein receiving the first transmission is based on receiving the indication.

[0152] In some examples, the first portion corresponds to a set of least significant bits of the overlay signal, and the second portion corresponds to a set of most significant bits of the overlay signal.

[0153] In some examples, the first portion corresponds to a set of most significant bits of the overlay signal, and the second portion corresponds to a set of least significant bits of the overlay signal.

[0154] In some examples, to support receiving the first transmission, the decoding component 740 may be configured to or otherwise support a component for decoding the enhancement layer of the overlay signal that includes an enhancement layer and a base layer, the base layer being associated with the second transmission.

[0155] In some examples, to support receiving the first transmission, the decoding component 740 may be configured to or otherwise support a component for decoding the base layer of the overlay signal that includes an enhancement layer and a base layer, the enhancement layer being associated with the second transmission.

[0156] In some examples, to support receiving the first transmission, the decoding component 740 may be configured to or otherwise support a component for decoding the overlay signal based on the second transmission having a higher priority than the first transmission to obtain the first transmission from the base layer of the overlay signal.

[0157] In some examples, the transmission layer component 750 may be configured to or otherwise support a component for receiving an indication in the overlay control information that the first transmission corresponds to a first transmission layer of the overlay signal and the second transmission corresponds to a second transmission layer of the overlay signal, the overlay control information indicating one or more parameters associated with the second transmission layer, wherein decoding the overlay signal includes. In some examples, the decoding component 740 may be configured to or otherwise support a component for decoding the overlay signal based on one or more parameters associated with the second transmission layer to obtain the first transmission from the first transmission layer of the overlay signal.

[0158] In some examples, the superposition control information indicates the time and frequency positions of the superposition signal, power parameters associated with the superposition signal, modulation and decoding schemes associated with the superposition signal, channel identifiers associated with the superposition signal, demodulation reference signal identifiers, or combinations thereof.

[0159] In some examples, the UE capability component 755 may be configured to or otherwise support components for sending a capability message to a network entity, the capability message indicating the ability to decode an enhancement layer of the superposition signal, wherein receiving the superposition control information is based on the capability message, the superposition control information indicating the superposition of the second transmission.

[0160] Figure 8 FIG. illustrates a diagram of a system 800 including a device 805 that supports superposition transmission to improve system performance in accordance with one or more aspects of the present disclosure. The device 805 may be an example of the device 505, the device 605, or the UE 115 described herein, or include components thereof. The device 805 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof (e.g., wirelessly). The device 805 may include components for two-way voice and data communication, the components including components for sending and receiving communication, such as a communication manager 820, an input / output (I / O) controller 810, a transceiver 815, an antenna 825, a memory 830, code 835, and a processor 840. These components may be electronically communicatively coupled or otherwise (e.g., operatively, communicatively, functionally, electronically, electrically) coupled via one or more buses (e.g., bus 845).

[0161] The I / O controller 810 may manage input signals and output signals of the device 805. The I / O controller 810 may also manage peripheral devices not integrated into the device 805. In some cases, the I / O controller 810 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 810 may utilize an operating system, such as or another known operating system. Additionally or alternatively, the I / O controller 810 may represent, or interact with, a modem, a keyboard, a mouse, a touch screen, or similar device. In some cases, the I / O controller 810 may be implemented as part of a processor (such as the processor 840). In some cases, a user may interact with the device 805 via the I / O controller 810 or via hardware components controlled by the I / O controller 810.

[0162] In some cases, device 805 may include a single antenna 825. However, in some other cases, device 805 may have more than one antenna 825, and the more than one antenna may be capable of concurrently transmitting or receiving multiple wireless transmissions. Transceiver 815 may communicate bidirectionally via one or more antennas 825, wired or wireless links as described herein. For example, transceiver 815 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. Transceiver 815 may also include a modem that is configured to: modulate a packet; provide the modulated packet to one or more antennas 825 for transmission; and demodulate a packet received from one or more antennas 825. Transceiver 815 or transceiver 815 and one or more antennas 825 may be examples of transmitter 515, transmitter 615, receiver 510, receiver 610, or any combination thereof or their components as described herein.

[0163] Memory 830 may include random access memory (RAM) and read only memory (ROM). Memory 830 may store computer-readable, computer-executable code 835 that includes instructions that, when executed by processor 840, cause device 805 to perform the various functions described herein. Code 835 may be stored on a non-transitory computer-readable medium (such as system memory or another type of memory). In some cases, code 835 may not be directly executable by processor 840 but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 830 may particularly include a basic input / output system (BIOS) that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0164] Processor 840 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, microcontroller, ASIC, FPGA, programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 840. Processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., functions or tasks that support superposition transmission to improve system performance). For example, device 805 or components of device 805 may include processor 840 and memory 830 coupled or coupled to processor 840, and processor 840 and memory 830 are configured to perform the various functions described herein.

[0165] According to examples as disclosed herein, the communication manager 820 may support wireless communication at a UE. For example, the communication manager 820 may be configured to or otherwise support components for receiving control signaling for scheduling a first transmission via a first resource set. The communication manager 820 may be configured to or otherwise support components for receiving superposition control information at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set. The communication manager 820 may be configured to or otherwise support components for monitoring the first resource set for the first transmission based on the control signaling. The communication manager 820 may be configured to or otherwise support components for decoding a superposition signal including the first transmission and the second transmission to receive the first transmission via the first resource set based on the superposition control information.

[0166] By including or configuring a communication manager 820 according to examples as described herein, the device 805 may support techniques for superposing a first transmission and a second transmission to support preemption or cancellation, which may improve communication reliability, reduce latency, and result in more efficient use of communication resources.

[0167] In some examples, the communication manager 820 may be configured to use or otherwise cooperate with the transceiver 815, one or more antennas 825, or any combination thereof to perform various operations (e.g., receive, monitor, transmit). Although the communication manager 820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 820 may be supported or performed by the processor 840, the memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions that can be executed by the processor 840 to cause the device 805 to perform various aspects of superposition transmission for improving system performance as described herein, or the processor 840 and the memory 830 may be otherwise configured to execute or support such operations.

[0168] Figure 9 Block diagram 900 illustrates a device 905 that supports superposition transmission for improving system performance in accordance with one or more aspects of the present disclosure. The device 905 may be an example of aspects of the network entity 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0169] The receiver 910 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 905. In some examples, the receiver 910 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 910 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0170] The transmitter 915 may provide components for outputting (e.g., transmitting, providing, conveying, delivering) information generated by other components of the device 905. For example, the transmitter 915 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 915 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, the transmitter 915 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 915 and the receiver 910 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0171] The communication manager 920, the receiver 910, the transmitter 915, or various combinations or various components thereof may be examples of components for performing aspects of superposition transmission for improving system performance as described herein. For example, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may support methods for performing one or more of the functions described herein.

[0172] In some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA, or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof configured to or otherwise supporting components for performing the functions described in this disclosure. In some examples, the processor and the memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0173] Additionally or alternatively, in some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (e.g., implemented as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., components configured or otherwise supporting the functions described in this disclosure).

[0174] In some examples, the communication manager 920 may be configured to use or otherwise cooperate with the receiver 910, the transmitter 915, or both to perform various operations (e.g., receive, obtain, monitor, output, transmit). For example, the communication manager 920 may receive information from the receiver 910, convey information to the transmitter 915, or integrate in combination with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.

[0175] According to examples disclosed herein, the communication manager 920 may support wireless communication at a network entity. For example, the communication manager 920 may be configured or otherwise support components for sending control signaling for scheduling a first transmission to a first UE via a first resource set. The communication manager 920 may be configured or otherwise support components for sending superposition control information to the first UE, the second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set. The communication manager 920 may be configured or otherwise support components for sending a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0176] By including or configuring a communication manager 920 according to examples described herein, a device 905 (e.g., a processor controlling the receiver 910, the transmitter 915, the communication manager 920, or combinations thereof or otherwise coupled thereto) may support techniques for superposing a first transmission and a second transmission to support preemption or cancellation, which may result in more efficient utilization of communication resources.

[0177] Figure 10Block diagram 1000 of device 1005 that illustrates superposition transmission in support of enhanced system performance in accordance with one or more aspects of the present disclosure. Device 1005 may be an example of aspects of device 905 or network entity 105 as described herein. Device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. Device 1005 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0178] The receiver 1010 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of device 1005. In some examples, the receiver 1010 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 1010 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0179] The transmitter 1015 may provide components for outputting (e.g., transmitting, providing, conveying, delivering) information generated by other components of device 1005. For example, the transmitter 1015 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1015 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, the transmitter 1015 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1015 and the receiver 1010 may be co-located in a transceiver that may include a modem or be coupled to a modem.

[0180] Device 1005 or its various components can be examples of components for performing various aspects of superposition transmission to improve system performance as described herein. For example, communication manager 1020 can include control signaling component 1025, superposition component 1030, communication component 1035, or any combination thereof. Communication manager 1020 can be an example of aspects of communication manager 920 as described herein. In some examples, communication manager 1020 or its various components can be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with receiver 1010, transmitter 1015, or both. For example, communication manager 1020 can receive information from receiver 1010, convey information to transmitter 1015, or integrate with receiver 1010, transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.

[0181] According to examples disclosed herein, communication manager 1020 can support wireless communication at a network entity. Control signaling component 1025 can be configured to or otherwise support components for transmitting control signaling for scheduling a first transmission to a first UE via a first resource set. Superposition component 1030 can be configured to or otherwise support components for transmitting superposition control information to the first UE, second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set. Communication component 1035 can be configured to or otherwise support components for transmitting a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0182] Figure 11FIG. 1100 is a block diagram illustrating a communication manager 1120 that supports superposition transmission to improve system performance in accordance with one or more aspects of the present disclosure. The communication manager 1120 may be an example of aspects of the communication manager 920, the communication manager 1020, or both as described herein. The communication manager 1120 or its various components may be examples of components for performing various aspects of superposition transmission to improve system performance as described herein. For example, the communication manager 1120 may include a control signaling component 1125, a superposition component 1130, a communication component 1135, a base layer component 1140, an enhanced layer component 1145, a modulation and coding scheme component 1150, a bit allocation component 1155, a transmission layer component 1160, a capability component 1165, a bit mapping component 1170, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses), and such communication may include communication within protocol layers of a protocol stack, communication associated with logical channels of the protocol stack (e.g., between protocol layers of the protocol stack, within devices, components, or virtualized components associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0183] In accordance with examples as disclosed herein, the communication manager 1120 may support wireless communication at a network entity. The control signaling component 1125 may be configured to or otherwise support components for transmitting control signaling for scheduling a first transmission to a first UE via a first resource set. The superposition component 1130 may be configured to or otherwise support components for transmitting superposition control information to the first UE, the second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set. The communication component 1135 may be configured to or otherwise support components for transmitting a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0184] In some examples, to support transmission of the superposition signal, the base layer component 1140 may be configured to or otherwise support components for transmitting the second transmission via a base layer of the superposition signal. In some examples, to support transmission of the superposition signal, the enhanced layer component 1145 may be configured to or otherwise support components for transmitting the first transmission via an enhanced layer of the superposition signal.

[0185] In some examples, to support the transmission of the superimposed signal, the enhanced layer component 1145 may be configured to or otherwise support the component for transmitting the second transmission via the enhanced layer of the superimposed signal. In some examples, to support the transmission of the superimposed signal, the base layer component 1140 may be configured to or otherwise support the component for transmitting the first transmission via the base layer of the superimposed signal.

[0186] In some examples, the superimposed control information indicates the time and frequency positions of the superimposed signal, the base layer or enhanced layer associated with the first transmission, the power parameters associated with the superimposed signal, the modulation and coding schemes associated with the superimposed signal, the channel identifier associated with the superimposed signal, the demodulation reference signal identifier associated with the superimposed signal, or a combination thereof.

[0187] In some examples, to support the transmission of the superimposed signal, the modulation and coding scheme component 1150 may be configured to or otherwise support the component for transmitting the superimposed signal according to the first modulation and coding scheme for the first transmission and the second modulation and coding scheme for the second transmission.

[0188] In some examples, the communication component 1135 may be configured to or otherwise support the component for transmitting the superimposed control information, which includes an indication of the first modulation and coding scheme, the second modulation and coding scheme, or both.

[0189] In some examples, to support the transmission of the superimposed signal, the communication component 1135 may be configured to or otherwise support the component for transmitting the superimposed signal, which is based on one or more parameters associated with the first UE including the first transmission as one of the base layer or the enhanced layer, and based on one or more parameters associated with the second UE including the second transmission as one of the base layer or the enhanced layer.

[0190] In some examples, the superimpose component 1130 may be configured to or otherwise support the component for transmitting the superimposed control information, which includes an indication of the base layer and the enhanced layer.

[0191] In some examples, the one or more parameters include a priority level, path loss, channel quality, device capabilities, or any combination thereof.

[0192] In some examples, the bit allocation component 1155 may be configured to or otherwise support the component for transmitting the superimposed control information, which includes an indication that a first portion of the superimposed signal is allocated for the first transmission and a second portion of the superimposed signal is allocated for the second transmission.

[0193] In some examples, the bit mapping component 1170 may be configured to or otherwise support components for mapping the first transmission to a set of the least significant bits of the superimposed signal. In some examples, the bit mapping component 1170 may be configured to or otherwise support components for mapping the second transmission to a set of the most significant bits of the superimposed signal, wherein transmitting the superimposed signal is based on the mapping.

[0194] In some examples, the bit mapping component 1170 may be configured to or otherwise support components for mapping the first transmission to a set of the most significant bits of the superimposed signal. In some examples, the bit mapping component 1170 may be configured to or otherwise support components for mapping the second transmission to a set of the least significant bits of the superimposed signal, wherein transmitting the superimposed signal is based on the mapping.

[0195] In some examples, to support transmitting a superimposed signal, the transmission layer component 1160 may be configured to or otherwise support components for a first transmission layer for transmitting the superimposed signal that includes the first transmission. In some examples, to support transmitting a superimposed signal, the transmission layer component 1160 may be configured to or otherwise support components for a second transmission layer for transmitting the superimposed signal that includes the second transmission.

[0196] In some examples, the superimposing component 1130 may be configured to or otherwise support components for transmitting the superimposing control information that includes an indication that the first transmission corresponds to the first transmission layer and the second transmission corresponds to the second transmission layer, the superimposing control information indicating one or more parameters associated with the first transmission layer, the second transmission layer, or both.

[0197] In some examples, the capabilities component 1165 may be configured to or otherwise support components for receiving a capabilities message that indicates the ability to decode an enhancement layer of the superimposed signal, wherein transmitting the superimposed signal is based on the capabilities message.

[0198] Figure 12FIG. illustrates a system 1200 including a device 1205 that supports superposition transmission to improve system performance, in accordance with one or more aspects of the present disclosure. The device 1205 may be an example of the device 905, the device 1005, or the network entity 105 described herein, or include components thereof. The device 1205 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which communication may include communication via one or more wired interfaces, via one or more wireless interfaces, or any combination thereof. The device 1205 may include components that support outputting and obtaining communications, such as a communication manager 1220, a transceiver 1210, an antenna 1215, a memory 1225, code 1230, and a processor 1235. These components may be electronically communicatively coupled via one or more buses (e.g., bus 1240) or otherwise (e.g., operatively, communicatively, functionally, electronically, electrically).

[0199] The transceiver 1210 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1210 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1210 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1205 may include one or more antennas 1215, which may be capable of (e.g., concurrently) sending or receiving wireless transmissions. The transceiver 1210 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., via one or more antennas 1215, via a wired transmitter); receiving the modulated signal (e.g., from one or more antennas 1215, from a wired receiver); and demodulating the signal. In some implementations, the transceiver 1210 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1215 configured to support various receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1215 configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1210 may include or be configured to be coupled to one or more processors or memory components, which are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other output, or any combination of the above. In some implementations, the transceiver 1210, or the transceiver 1210 and one or more antennas 1215, or the transceiver 1210 and one or more antennas 1215 and one or more processors or memory components (e.g., processor 1235 or memory 1225 or both) may be included in a chip or chip assembly installed in the device 1205. In some examples, the transceiver may be operable to support communications via one or more communication links (eg, communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0200] Memory 1225 may include RAM and ROM. Memory 1225 may store computer-readable, computer-executable code 1230 including instructions that, when executed by processor 1235, cause device 1205 to perform the various functions described herein. Code 1230 may be stored in a non-transitory computer-readable medium (such as system memory or another type of memory). In some cases, code 1230 may not be directly executable by processor 1235 but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1225 may particularly include BIOS, which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0201] The processor 1235 may include intelligent hardware devices (such as general-purpose processors, DSPs, ASICs, CPUs, FPGAs, microcontrollers, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1235 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1235. The processor 1235 may be configured to execute computer-readable instructions stored in a memory (such as the memory 1225) to cause the device 1205 to perform various functions (such as functions or tasks that support superposition transmission to improve system performance). For example, the device 1205 or components of the device 1205 may include the processor 1235 and the memory 1225 coupled to the processor 1235, and the processor 1235 and the memory 1225 are configured to perform the various functions described herein. The processor 1235 may be an example of a cloud computing platform (such as one or more physical nodes and supporting software (such as an operating system, virtual machine, or container instance)), which may (for example, by executing the code 1230) host functions to perform the functions of the device 1205. The processor 1235 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1205 (such as within the memory 1225). In some specific implementations, the processor 1235 may be a component of a processing system. A processing system generally may refer to a system or a series of machines or components that receive inputs and process these inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the device 1205). For example, the processing system of the device 1205 may refer to a system that includes various other components or sub-components of the device 1205, such as the processor 1235, or the transceiver 1210, or the communication manager 1220, or a combination of other components or components of the device 1205. The processing system of the device 1205 may interface with other components of the device 1205 and may process information (such as inputs or signals) received from other components or output information to other components. For example, a chip or modem of the device 1205 may include a processing system and one or more interfaces for outputting information or for obtaining information or both. One or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information or the same interface configured to output information and obtain information, as well as other specific implementations. In some specific implementations, one or more interfaces may refer to an interface between the processing system of a chip or modem and a transmitter such that the device 1205 can transmit information output from the chip or modem.Additionally or alternatively, in some embodiments, one or more interfaces may refer to an interface between a processing system of a chip or modem and a receiver such that the device 1205 can obtain information or signal inputs, and this information can be passed to the processing system. Those of ordinary skill in the art will readily recognize that the first interface may also obtain information or signal inputs, and the second interface may also output information or signal outputs.

[0202] In some examples, the bus 1240 may support communication within a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, the bus 1240 may support communication associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communication performed within components of the device 1205 or between different components of the device 1205 that may be co-located or located at different positions (e.g., where the device 1205 may refer to a system in which one or more of the communication manager 1220, transceiver 1210, memory 1225, code 1230, and processor 1235 may be located in one component or divided among different components).

[0203] In some examples, the communication manager 1220 may manage (e.g., via one or more wired or wireless backhaul links) aspects of communication with the core network 130. For example, the communication manager 1220 may manage the transfer of data communication for client devices such as one or more UEs 115. In some examples, the communication manager 1220 may manage communication with other network entities 105 and may include a controller or scheduler for coordinating with other network entities 105 to control communication with the UEs 115. In some examples, the communication manager 1220 may support the X2 interface within the LTE / LTE-A wireless communication network technology to provide communication between network entities 105.

[0204] According to examples disclosed herein, the communication manager 1220 may support wireless communication at a network entity. For example, the communication manager 1220 may be configured or otherwise support components for sending control signaling for scheduling a first transmission to a first UE via a first resource set. The communication manager 1220 may be configured or otherwise support components for sending superposition control information to the first UE, the second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set. The communication manager 1220 may be configured or otherwise support components for sending a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0205] By including or configuring a communication manager 1220 according to the examples described herein, the device 1205 may support techniques for superimposing a first transmission and a second transmission to support preemption or cancellation, which may improve communication reliability, reduce latency, and result in more efficient utilization of communication resources.

[0206] In some examples, the communication manager 1220 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the transceiver 1210, one or more antennas 1215 (e.g., where applicable), or any combination thereof. Although the communication manager 1220 is illustrated as a separate component, in some examples, one or more of the functions described with reference to the communication manager 1220 may be supported or performed by the transceiver 1210, the processor 1235, the memory 1225, the code 1230, or any combination thereof. For example, the code 1230 may include instructions that can be executed by the processor 1235 to cause the device 1205 to perform various aspects of the superimposed transmission that improve system performance as described herein, or the processor 1235 and the memory 1225 may otherwise be configured to perform or support such operations.

[0207] Figure 13 A flowchart is illustrated that illustrates a method 1300 for supporting a superimposed transmission that improves system performance according to one or more aspects of the present disclosure. The operations of the method 1300 may be implemented by a UE or its components as described herein. For example, the operations of the method 1300 may be performed by a UE 115 as described with reference to Figures 1 to 8 the description. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0208] At 1305, the method may include: receiving control signaling scheduling a first transmission via a first resource set. The operation of 1305 may be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1305 may be performed by a scheduling component 725 as described with reference to Figure 7 the description.

[0209] At 1310, the method may include: receiving superimposed control information indicating a superimposition of the second transmission and the first transmission during at least a portion of the first resource set, at least in part based on the second transmission having a higher priority than the first transmission. The operation of 1310 may be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1310 may be performed by a superimposing component 730 as described with reference to Figure 7 the description.

[0210] At 1315, the method may include: monitoring a first set of resources for the first transmission based on the control signaling. The operation at 1315 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1315 may be performed by a monitoring component 735 as described in reference to Figure 7 the description.

[0211] At 1320, the method may include: decoding a superimposed signal including the first transmission and the second transmission based on the superimposed control information to receive the first transmission via the first set of resources. The operation at 1320 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1320 may be performed by a decoding component 740 as described in reference to Figure 7 the description.

[0212] Figure 14 An example flowchart illustrates a method 1400 for supporting superimposed transmissions that improve system performance according to one or more aspects of the present disclosure. The operations of method 1400 may be implemented by a UE or its components as described herein. For example, the operations of method 1400 may be performed by a UE 115 as described in reference to Figures 1 to 8 the description. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0213] At 1405, the method may include: sending a capability message to a network entity, the capability message indicating the ability to decode an enhancement layer of the superimposed signal. The operation at 1405 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1405 may be performed by a UE capability component 755 as described in reference to Figure 7 the description.

[0214] At 1410, the method may include: receiving control signaling scheduling the first transmission via the first set of resources. The operation at 1410 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1410 may be performed by a scheduling component 725 as described in reference to Figure 7 the description.

[0215] At 1415, the method may include: receiving superimposed control information at least partially based on the second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first set of resources. The operation at 1415 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1415 may be performed by a superimposing component 730 as described in reference to Figure 7 the description.

[0216] At 1420, the method may include: monitoring a first set of resources for the first transmission based on the control signaling. The operation at 1420 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1420 may be performed by a monitoring component 735 as described with reference to Figure 7 the description.

[0217] At 1425, the method may include: decoding a superimposed signal including the first transmission and the second transmission based on the superimposed control information to receive the first transmission via the first set of resources. The operation at 1425 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1425 may be performed by a decoding component 740 as described with reference to Figure 7 the description.

[0218] Figure 15 FIG. illustrates a flow chart that illustrates a method 1500 for supporting superimposed transmissions that improve system performance according to one or more aspects of the present disclosure. The operations of method 1500 may be implemented by a network entity or its components as described herein. For example, the operations of method 1500 may be performed by a network entity as described with reference to Figures 1 to 4 and Figures 9 to 12 the description. In some examples, the network entity may execute an instruction set to control functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described functions.

[0219] At 1505, the method may include: transmitting control signaling scheduling the first transmission to a first UE via a first set of resources. The operation at 1505 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1505 may be performed by a control signaling component 1125 as described with reference to Figure 11 the description.

[0220] At 1510, the method may include: transmitting superimposed control information to the first UE, the second UE, or both, at least in part based on the second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first set of resources. The operation at 1510 may be performed according to the examples disclosed herein. In some examples, aspects of the operation at 1510 may be performed by a superimposing component 1130 as described with reference to Figure 11 the description.

[0221] At 1515, the method may include: sending a superimposed signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superimposed signal including at least a portion of the first transmission and the second transmission. The operations at 1515 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1515 may be performed by a communication component 1135 as described with reference to Figure 11 as described.

[0222] Figure 16 Illustrates a flowchart that illustrates a method 1600 for supporting superimposed transmission to improve system performance in accordance with one or more aspects of the present disclosure. The operations of method 1600 may be implemented by a network entity or its components as described herein. For example, the operations of method 1600 may be performed by a network entity as described with reference to Figures 1 to 4 and Figures 9 to 12 described. In some examples, the network entity may execute an instruction set to control functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described functions.

[0223] At 1605, the method may include: receiving a capability message that indicates the ability to decode an enhanced layer of the superimposed signal. The operations at 1605 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1605 may be performed by a capability component 1165 as described with reference to Figure 11 as described.

[0224] At 1610, the method may include: sending control signaling scheduling the first transmission to a first UE via a first resource set. The operations at 1610 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1610 may be performed by a control signaling component 1125 as described with reference to Figure 11 described.

[0225] At 1615, the method may include: sending superimposed control information to the first UE, the second UE, or both at least partially based on the second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first resource set. The operations at 1615 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1615 may be performed by a superimposed component 1130 as described with reference to Figure 11 described.

[0226] At 1620, the method may include: sending a superimposed signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superimposed signal including at least a portion of the first transmission and the second transmission. The operation of 1620 may be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1620 may be performed by the communication component 1135 as described with reference to Figure 11 as described.

[0227] An overview of aspects of the present disclosure is provided below:

[0228] Aspect 1: A method for wireless communication at a UE, the method including: receiving control signaling scheduling a first transmission via a first resource set; receiving superimposed control information at least partially based on a second transmission having a higher priority than the first transmission, the superimposed control information indicating a superimposition of the second transmission and the first transmission during at least a portion of the first resource set; monitoring the first resource set for the first transmission at least partially based on the control signaling; and decoding a superimposed signal including the first transmission and the second transmission at least partially based on the superimposed control information to receive the first transmission via the first resource set.

[0229] Aspect 2: The method according to aspect 1, the method further including: receiving an indication in the superimposed control information of whether to transmit the first transmission via an enhancement layer of the superimposed signal or a base layer of the superimposed signal, wherein receiving the first transmission is at least partially based on the indication.

[0230] Aspect 3: The method according to aspect 1, the method further including: receiving an indication in the superimposed control information that a first portion of the superimposed signal is allocated for the first transmission and a second portion of the superimposed signal is allocated for the second transmission, wherein receiving the first transmission is at least partially based on receiving the indication.

[0231] Aspect 4: The method according to aspect 3, wherein the first portion corresponds to a set of least significant bits of the superimposed signal, and the second portion corresponds to a set of most significant bits of the superimposed signal.

[0232] Aspect 5: The method according to aspect 3, wherein the first portion corresponds to a set of most significant bits of the superimposed signal, and the second portion corresponds to a set of least significant bits of the superimposed signal.

[0233] Aspect 6: The method according to any one of Aspects 1 to 2, wherein receiving the first transmission comprises: decoding the enhancement layer of the superimposed signal comprising an enhancement layer and a base layer, the base layer being associated with the second transmission.

[0234] Aspect 7: The method according to any one of Aspects 1 to 2, wherein receiving the first transmission comprises: decoding the base layer of the superimposed signal comprising an enhancement layer and a base layer, the enhancement layer being associated with the second transmission.

[0235] Aspect 8: The method according to any one of Aspects 1 to 2, wherein receiving the first transmission comprises: decoding the superimposed signal at least in part based on the second transmission having a higher priority than the first transmission to obtain the first transmission from the base layer of the superimposed signal.

[0236] Aspect 9: The method according to Aspect 1, the method further comprising: receiving in the superimposed control information an indication that the first transmission corresponds to a first transmission layer of the superimposed signal and the second transmission corresponds to a second transmission layer of the superimposed signal, the superimposed control information indicating one or more parameters associated with the second transmission layer, wherein decoding the superimposed signal comprises: decoding the superimposed signal at least in part based on one or more parameters associated with the second transmission layer to obtain the first transmission from the first transmission layer of the superimposed signal.

[0237] Aspect 10: The method according to any one of Aspects 1 to 9, wherein the superimposed control information indicates the time and frequency position of the superimposed signal, a power parameter associated with the superimposed signal, a modulation and coding scheme associated with the superimposed signal, a channel identifier associated with the superimposed signal, a demodulation reference signal identifier, or a combination thereof.

[0238] Aspect 11: The method according to any one of Aspects 1 to 10, the method further comprising: sending a capability message to a network entity, the capability message indicating the ability to decode the enhancement layer of the superimposed signal, wherein receiving the superimposed control information is at least in part based on the capability message, the superimposed control information indicating the superimposition of the second transmission.

[0239] Aspect 12: A method for wireless communication at a network entity, the method comprising: sending control signaling for scheduling a first transmission to a first UE via a first resource set; sending superposition control information to the first UE, a second UE, or both, at least partially based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and sending a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal including at least a portion of the first transmission and the second transmission.

[0240] Aspect 13: The method according to aspect 12, wherein sending the superposition signal comprises: sending the second transmission via a base layer of the superposition signal; and sending the first transmission via an enhanced layer of the superposition signal.

[0241] Aspect 14: The method according to aspect 12, wherein sending the superposition signal comprises: sending the second transmission via an enhanced layer of the superposition signal; and sending the first transmission via a base layer of the superposition signal.

[0242] Aspect 15: The method according to any one of aspects 12 to 14, wherein the superposition control information indicates a time and frequency position of the superposition signal, a base layer or an enhanced layer associated with the first transmission, a power parameter associated with the superposition signal, a modulation and coding scheme associated with the superposition signal, a channel identifier associated with the superposition signal, a demodulation reference signal identifier associated with the superposition signal, or a combination thereof.

[0243] Aspect 16: The method according to any one of aspects 12 to 15, wherein sending the superposition signal comprises: sending the superposition signal according to a first modulation and coding scheme for the first transmission and a second modulation and coding scheme for the second transmission.

[0244] Aspect 17: The method according to aspect 16, the method further comprising: sending the superposition control information, the superposition control information including an indication of the first modulation and coding scheme, the second modulation and coding scheme, or both.

[0245] Aspect 18: The method according to any one of Aspects 12 to 17, wherein transmitting the superimposed signal comprises: transmitting the superimposed signal, the superimposed signal being at least partially based on one or more parameters associated with the first UE and comprising the first transmission as one of a base layer or an enhanced layer, and at least partially based on one or more parameters associated with the second UE and comprising the second transmission as one of the base layer or the enhanced layer.

[0246] Aspect 19: The method according to Aspect 18, the method further comprising: transmitting the superimposed control information, the superimposed control information comprising an indication of the base layer and the enhanced layer.

[0247] Aspect 20: The method according to any one of Aspects 18 to 19, wherein the one or more parameters comprise a priority level, path loss, channel quality, device capabilities, or any combination thereof.

[0248] Aspect 21: The method according to Aspect 12, the method further comprising: transmitting the superimposed control information, the superimposed control information comprising an indication that a first portion of the superimposed signal is allocated for the first transmission and a second portion of the superimposed signal is allocated for the second transmission.

[0249] Aspect 22: The method according to Aspect 21, the method further comprising: mapping the first transmission to a plurality of least significant bits of the superimposed signal; and mapping the second transmission to a plurality of most significant bits of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the mapping.

[0250] Aspect 23: The method according to Aspect 21, the method further comprising: mapping the first transmission to a plurality of most significant bits of the superimposed signal; and mapping the second transmission to a plurality of least significant bits of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the mapping.

[0251] Aspect 24: The method according to Aspect 12, wherein transmitting the superimposed signal comprises: transmitting a first transmission layer of the superimposed signal comprising the first transmission; and transmitting a second transmission layer of the superimposed signal comprising the second transmission.

[0252] Aspect 25: The method according to Aspect 24, the method further comprising: transmitting the superimposed control information, the superimposed control information comprising an indication that the first transmission corresponds to the first transmission layer and the second transmission corresponds to the second transmission layer, the superimposed control information indicating one or more parameters associated with the first transmission layer, the second transmission layer, or both.

[0253] Aspect 26: The method according to any one of aspects 12 to 25, the method further comprising: receiving a capability message indicating the ability to decode an enhancement layer of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the capability message.

[0254] Aspect 27: An apparatus for wireless communication at a UE, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of aspects 1 to 11.

[0255] Aspect 28: An apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing the method according to any one of aspects 1 to 11.

[0256] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 11.

[0257] Aspect 30: An apparatus for wireless communication at a network entity, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of aspects 12 to 26.

[0258] Aspect 31: An apparatus for wireless communication at a network entity, the apparatus comprising at least one component for performing the method according to any one of aspects 12 to 26.

[0259] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to perform the method according to any one of aspects 12 to 26.

[0260] It should be noted that the methods described herein describe possible specific implementations, and the operations and steps may be rearranged or otherwise modified and other specific implementations are also possible. In addition, aspects from two or more of the methods may be combined.

[0261] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in much of the description, the techniques described herein may also apply to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may apply to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0262] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the specification may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0263] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0264] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. When implemented using software executed by a processor, the functions may be stored as one or more instructions or code on a computer-readable medium or transmitted using one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions may also be physically located at different positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0265] A computer-readable medium includes both a non-transitory computer storage medium and a communication medium including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc read only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc. Disk may reproduce data magnetically, while disc may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable medium.

[0266] As used herein, including in the claims, the "or" used in a list of items (e.g., a list of items accompanied by a phrase such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, the listing of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Additionally, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0267] The term "determine" encompasses a variety of actions, and thus, "determine" can include operations, calculations, processing, derivations, inquiries, lookups (such as looking up in a table, database, or other data structure), ascertaining, and the like. Additionally, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Further, "determine" can include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0268] In the drawings, similar components or features may have the same reference numerals. Additionally, various components of the same type can be distinguished by adding a dash and a second numeral used to differentiate between similar components after the reference numeral. If only the first reference numeral is used in the specification, the description can apply to any one of the similar components having the same first reference numeral, regardless of the second reference numeral or any other subsequent reference numerals.

[0269] The description set forth herein in connection with the drawings describes example configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples". The detailed description includes specific details for providing an understanding of the described techniques. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0270] The present description is provided to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive control signaling scheduling a first transmission via a first resource set; receive superposition control information at least in part based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; monitor the first resource set for the first transmission at least in part based on the control signaling; and decode a superposition signal including the first transmission and the second transmission at least in part based on the superposition control information to receive the first transmission via the first resource set.

2. The apparatus according to claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: receive an indication in the superposition control information of whether to transmit the first transmission via an enhanced layer or a base layer of the superposition signal, wherein receiving the first transmission is at least in part based on the indication.

3. The apparatus according to claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: receive an indication in the superposition control information that a first portion of the superposition signal is allocated for the first transmission and a second portion of the superposition signal is allocated for the second transmission, wherein receiving the first transmission is at least in part based on receiving the indication.

4. The apparatus according to claim 3, wherein the first portion corresponds to a set of least significant bits of the superposition signal, and the second portion corresponds to a set of most significant bits of the superposition signal.

5. The apparatus according to claim 3, wherein the first portion corresponds to a set of most significant bits of the superposition signal, and the second portion corresponds to a set of least significant bits of the superposition signal.

6. The apparatus according to claim 1, wherein the instructions for receiving the first transmission are executable by the processor to cause the apparatus to: decode the enhanced layer of the superposition signal including an enhanced layer and a base layer, the base layer being associated with the second transmission.

7. The apparatus according to claim 1, wherein the instructions for receiving the first transmission are executable by the processor to cause the apparatus to: decode the base layer of the superposition signal including an enhanced layer and a base layer, the enhanced layer being associated with the second transmission.

8. The apparatus according to claim 1, wherein the instructions for receiving the first transmission are executable by the processor to cause the apparatus to: decode the superposition signal at least in part based on the second transmission having a higher priority than the first transmission to obtain the first transmission from the base layer of the superposition signal.

9. The apparatus according to claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: receive, in the superposition control information, an indication that the first transmission corresponds to a first transmission layer of the superposition signal and the second transmission corresponds to a second transmission layer of the superposition signal, the superposition control information indicating one or more parameters associated with the second transmission layer, wherein decoding the superposition signal comprises: decoding the superposition signal at least in part based on the one or more parameters associated with the second transmission layer to obtain the first transmission from the first transmission layer of the superposition signal.

10. The apparatus according to claim 1, wherein the superposition control information indicates a time and frequency position of the superposition signal, a power parameter associated with the superposition signal, a modulation and coding scheme associated with the superposition signal, a channel identifier associated with the superposition signal, a demodulation reference signal identifier, or a combination thereof.

11. The apparatus according to claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: send a capability message to a network entity, the capability message indicating a capability to decode an enhanced layer of the superposition signal, wherein receiving the superposition control information is at least in part based on the capability message, the superposition control information indicating the superposition of the second transmission.

12. An apparatus for wireless communication at a network entity, the apparatus comprises: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: send control signaling for scheduling a first transmission to a first user equipment (UE) via a first resource set; send superposition control information to the first UE, a second UE, or both, at least in part based on a second transmission having a higher priority than the first transmission, the superposition control information indicating superposition of the second transmission and the first transmission during at least a portion of the first resource set; and send a superposition signal to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set, the superposition signal comprising at least a portion of the first transmission and the second transmission.

13. The apparatus according to claim 12, wherein the instructions for sending the superposition signal are executable by the processor to cause the apparatus to: send the second transmission via a base layer of the superposition signal; and send the first transmission via an enhanced layer of the superposition signal.

14. The apparatus according to claim 12, wherein the instructions for sending the superposition signal are executable by the processor to cause the apparatus to: send the second transmission via an enhanced layer of the superposition signal; and send the first transmission via a base layer of the superposition signal.

15. The apparatus according to claim 12, wherein the superimposed control information indicates the time and frequency positions of the superimposed signal, the base layer or the enhancement layer associated with the first transmission, the power parameter associated with the superimposed signal, the modulation and coding scheme associated with the superimposed signal, the channel identifier associated with the superimposed signal, the demodulation reference signal identifier associated with the superimposed signal, or a combination thereof.

16. The apparatus according to claim 12, wherein the instruction for transmitting the superimposed signal can be executed by the processor to cause the apparatus to: Transmit the superimposed signal according to a first modulation and coding scheme for the first transmission and a second modulation and coding scheme for the second transmission.

17. The apparatus according to claim 16, wherein the instruction can further be executed by the processor to cause the apparatus to: Transmit the superimposed control information, the superimposed control information including an indication of the first modulation and coding scheme, the second modulation and coding scheme, or both.

18. The apparatus according to claim 12, wherein the instruction for transmitting the superimposed signal can be executed by the processor to cause the apparatus to: Transmit the superimposed signal, the superimposed signal being at least partially based on one or more parameters associated with the first UE including the first transmission as one of the base layer or the enhancement layer, and at least partially based on one or more parameters associated with the second UE including the second transmission as one of the base layer or the enhancement layer.

19. The apparatus according to claim 18, wherein the instruction can further be executed by the processor to cause the apparatus to: Transmit the superimposed control information, the superimposed control information including an indication of the base layer and the enhancement layer.

20. The apparatus according to claim 18, wherein the one or more parameters include a priority level, a path loss, a channel quality, a device capability, or any combination thereof.

21. The apparatus according to claim 12, wherein the instruction can further be executed by the processor to cause the apparatus to: Transmit the superimposed control information, the superimposed control information including an indication that a first portion of the superimposed signal is allocated for the first transmission and a second portion of the superimposed signal is allocated for the second transmission.

22. The apparatus according to claim 21, wherein the instruction can further be executed by the processor to cause the apparatus to: Map the first transmission to the least significant bits of the superimposed signal, and map the second transmission to the most significant bits of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the mapping.

23. The apparatus according to claim 21, wherein the instruction can further be executed by the processor to cause the apparatus to: Map the first transmission to the most significant bits of the superimposed signal, and map the second transmission to the least significant bits of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the mapping.

24. The apparatus according to claim 12, wherein the instruction for transmitting the superimposed signal can be executed by the processor to cause the apparatus to: Transmit a first transmission layer of the superimposed signal including the first transmission; and Transmit a second transmission layer of the superimposed signal including the second transmission.

25. The apparatus according to claim 24, wherein the instruction can further be executed by the processor to cause the apparatus to: Transmit the superimposed control information, the superimposed control information including an indication that the first transmission corresponds to the first transmission layer and the second transmission corresponds to the second transmission layer, the superimposed control information indicating one or more parameters associated with the first transmission layer, the second transmission layer, or both.

26. The apparatus according to claim 12, wherein the instruction can further be executed by the processor to cause the apparatus to: Receive a capability message, the capability message indicating the ability to decode an enhancement layer of the superimposed signal, wherein transmitting the superimposed signal is at least partially based on the capability message.

27. A method for wireless communication at a user equipment (UE), the method comprises: Receiving control signaling for scheduling a first transmission via a first resource set; Receiving superimposed control information at least partially based on a second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first resource set; Monitoring the first resource set for the first transmission at least partially based on the control signaling; and Decoding a superimposed signal including the first transmission and the second transmission at least partially based on the superimposed control information to receive the first transmission via the first resource set.

28. The method according to claim 27, wherein receiving the first transmission comprises: Decoding the enhancement layer of the superimposed signal including an enhancement layer and a base layer, the base layer being associated with the second transmission.

29. The method according to claim 27, wherein receiving the first transmission comprises: Decoding the base layer of the superimposed signal including an enhancement layer and a base layer, the enhancement layer being associated with the second transmission.

30. A method for wireless communication at a network entity, the method comprises: Transmitting control signaling for scheduling a first transmission to a first user equipment (UE) via a first resource set; Transmitting superimposed control information to the first UE, a second UE, or both at least partially based on a second transmission having a higher priority than the first transmission, the superimposed control information indicating the superimposition of the second transmission and the first transmission during at least a portion of the first resource set; and Transmitting a superimposed signal including at least a portion of the first transmission and the second transmission to the first UE, the second UE, or both via a second resource set that at least partially overlaps with the first resource set.

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