Techniques for sharing transmit power during handover in wireless communications

Abstract

The present disclosure provides systems, methods, and apparatus for canceling transmissions during a handover operation, including computer programs encoded on a computer storage medium. In one aspect, a user equipment (UE) may cancel at least a portion of a first uplink transmission when the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell in a handover (HO) based on a dual-active protocol stack (DAPS). In another aspect, a network may receive from the UE a capability indicating whether canceling uplink transmissions from a source cell in a DAPS-based HO is supported, and the network may schedule uplink transmissions for the UE to the target cell during the DAPS-based HO based on the capability.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to provisional patent application No. 62 / 994,264, filed on March 24, 2020, and entitled “TECHNIQUES FOR SHARING TRANSMISSION POWER DURING HANDOVER IN WIRELESS COMMUNICATIONS”; and U.S. patent application No. 17 / 181,616, filed on February 22, 2021, and entitled “TECHNIQUES FOR SHARING TRANSMISSION POWER DURING HANDOVER IN WIRELESS COMMUNICATIONS”, all of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference for all purposes. Technical Field

[0003] The present disclosure relates to wireless communication systems, and more particularly, to performing handover procedures. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA).

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at local, national, regional, and even global levels. For example, relative to current mobile network generations, the fifth generation (5G) wireless communication technology (which may be referred to as 5G New Radio (5G NR)) is envisioned to expand and support diverse usage scenarios and applications. In one aspect, 5G communication technology may include: enhanced mobile broadband addressing human-centric use cases for access to multimedia content, services, and data; ultra-reliable low-latency communication (URLLC) with certain specifications for latency and reliability; and massive machine-type communication, which may allow for a very large number of connected devices and the transmission of relatively low volumes of non-latency sensitive information. However, as the demand for mobile broadband access continues to grow, further improvements to 5G communication technology and communication technologies beyond it may be expected. Summary of the Invention

[0006] The systems, methods, and devices of the disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein.

[0007] One innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication, the apparatus comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: send a signal to a source cell indicating whether a capability to cancel uplink transmissions to the source cell in a DAPS-based HO is supported; receive an uplink grant from the source cell for scheduling a first uplink transmission during the DAPS-based HO; and cancel at least a portion of the first uplink transmission if the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell.

[0008] In some implementations, the apparatus may include: wherein the first uplink transmission and the second uplink transmission are in overlapping time resources.

[0009] In some implementations, the apparatus may include wherein the one or more processors are configured to cancel at least a portion of the first uplink transmission based on a cancellation timeline.

[0010] In some implementations, the apparatus may include: wherein the one or more processors are further configured to: send the second uplink transmission to the target cell if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell, and if the capability indication supports canceling the uplink transmission to the source cell in the DAPS-based HO.

[0011] In some implementations, the apparatus may include where the one or more processors are configured to cancel at least a portion of the first uplink transmission if the apparatus does not indicate a second capability for power sharing.

[0012] In some implementations, the apparatus may include wherein the one or more processors are configured to cancel at least a portion of the first uplink transmission if the apparatus does not receive an indication to power share.

[0013] In some implementations, the apparatus may include: wherein the one or more processors are further configured to: indicate a configuration error to at least the source cell if the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell, and if the capability indication does not support cancellation of the uplink transmission to the source cell in the DAPS-based HO.

[0014] In some implementations, the apparatus may include where the one or more processors are configured to indicate a configuration error if the apparatus does not indicate the second capability for power sharing.

[0015] In some implementations, the apparatus may include where the one or more processors are configured to indicate a configuration error if the apparatus does not receive an indication for power sharing.

[0016] In some implementations, the apparatus may include: wherein the capability indicates, for each frequency band combination, whether cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

[0017] Another innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication, the apparatus comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: receive a capability from a UE indicating whether to support canceling uplink transmissions from a source cell in a DAPS-based HO; and, if the capability indicates support for canceling uplink transmissions from the source cell in a DAPS-based HO, schedule uplink transmissions to a target cell for the UE during the DAPS-based HO.

[0018] In some implementations, the apparatus may include: wherein the one or more processors are further configured to: if the capability indication does not support cancellation of uplink transmissions from the source cell in the DAPS-based HO, avoid scheduling uplink transmissions for the UE if the uplink transmissions overlap with a second uplink transmission scheduled by the target cell for the UE during the DAPS-based HO.

[0019] In some implementations, the apparatus may include: wherein the uplink transmission and the second uplink transmission are in overlapping time resources.

[0020] In some implementations, the apparatus may include where the one or more processors are further configured to avoid scheduling uplink transmissions if the UE transmits a second capability for power sharing.

[0021] In some implementations, the apparatus may include: wherein the one or more processors are further configured to: refrain from scheduling uplink transmissions if the apparatus sends an indication of power sharing to the UE.

[0022] In some implementations, the apparatus may include: wherein the capability indicates, for each frequency band combination, whether cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

[0023] Another innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication at an apparatus of a UE, the method comprising: sending, to a source cell, a capability indicating whether to support cancelling uplink transmissions to the source cell in a DAPS-based HO; receiving, from the source cell, an uplink grant for scheduling a first uplink transmission during the DAPS-based HO; and cancelling at least a portion of the first uplink transmission if the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell.

[0024] In some implementations, the method may include where the first uplink transmission and the second uplink transmission are in overlapping time resources.

[0025] In some implementations, the method may include where canceling at least a portion of the first uplink transmission is based on a cancellation timeline.

[0026] In some implementations, the method may include, if the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell, and if the capability indication supports canceling the uplink transmission to the source cell in a DAPS-based HO, sending the second uplink transmission to the target cell.

[0027] In some implementations, the method may include performing canceling at least a portion of the first uplink transmission if the UE does not indicate a second capability for power sharing.

[0028] In some implementations, the method may include performing, if the UE does not receive an indication for power sharing, canceling at least a portion of the first uplink transmission.

[0029] In some implementations, the method may include indicating a configuration error to at least the source cell if the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell and if the capability indication does not support canceling the uplink transmission to the source cell in the DAPS-based HO.

[0030] In some implementations, the method may include, if the UE does not indicate a second capability for power sharing, performing indicating a configuration error.

[0031] In some implementations, the method may include, if the UE does not receive an indication of power sharing, performing indicating a configuration error.

[0032] In some implementations, the method may include: wherein the capability indicates, for each frequency band combination, whether cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

[0033] Another innovative aspect of the subject matter described in this disclosure can be implemented in a method for wireless communication at an apparatus of a network, the method comprising: receiving, from a UE, a capability indicating whether cancellation of uplink transmission from a source cell in a DAPS-based HO is supported; and scheduling, for the UE, uplink transmission to a target cell during the DAPS-based HO if the capability indicates support for cancellation of uplink transmission from the source cell in the DAPS-based HO.

[0034] In some implementations, the method may include, if the capability indication does not support cancellation of uplink transmissions from the source cell in the DAPS-based HO, avoiding scheduling an uplink transmission for the UE if the uplink transmission overlaps with a second uplink transmission scheduled by the target cell for the UE during the DAPS-based HO.

[0035] In some implementations, the method may include where the uplink transmission and the second uplink transmission are in overlapping time resources.

[0036] In some implementations, the method may include: wherein the capability indicates, for each frequency band combination, whether cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

[0037] The details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the following description. Other features, aspects, and advantages will become apparent from the description, drawings, and claims. It should be noted that the relative dimensions of the following figures may not be drawn to scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0039] Figure 2 An example of a user equipment (UE) is shown.

[0040] Figure 3 An example of a base station (BS) is shown.

[0041] Figure 4 An example of a flow chart for determining a power sharing mode for Dual Active Protocol Stack (DAPS) based HO is shown.

[0042] Figure 5 An example of a flow chart for indicating whether the capability of canceling uplink transmission in DAPS-based HO is supported is shown.

[0043] Figure 6 An example of a flow chart for scheduling uplink transmission based on whether the capability of canceling uplink transmission in DAPS-based HO is supported is shown.

[0044] Figure 7 A block diagram illustrating an example of a communication system including a base station and a UE is shown.

[0045] Like reference numbers and designations throughout the drawings indicate like elements. DETAILED DESCRIPTION

[0046] For the purpose of describing the innovative aspects of the present disclosure, the following description refers to certain implementations. However, those skilled in the art will readily recognize that the teachings herein can be applied in a variety of different ways. Some examples in the present disclosure are based on wireless and wired local area network (LAN) communications in accordance with the Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless standard, the IEEE 802.3 Ethernet standard, and the IEEE 1901 Power Line Communication (PLC) standard. However, the described implementations can be implemented in any device, system, or network capable of sending and receiving RF signals in accordance with any wireless communication standard, including any of the following: the IEEE 802.11 standard, the IEEE 802.3 Ethernet standard, and the IEEE 1901 Power Line Communication (PLC) standard. Standard, Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Global System for Mobile Communications (GSM), GSM / General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), Terrestrial Trunked Radio (TETRA), Wideband-CDMA (W-CDMA), Evolution-Data Optimized (EV-DO), 1xEV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Evolved High Speed Packet Access (HSPA+), Long Term Evolution (LTE), AMPS, or other known signals used to communicate within a wireless, cellular or Internet of Things (IoT) network, such as a system utilizing 3G, 4G or 5G, or another implementation or technology thereof.

[0047] In some wireless communication technologies, such as 5G, a user equipment (UE) can perform a handover from one cell (or corresponding gNB or cell group) to another. During the handover, the Dual Active Protocol Stack (DAPS) functionality is defined to allow the UE to maintain an active protocol stack between the source cell and the target cell (or corresponding gNB or cell group). In a DAPS-based handover, the UE can still send and receive data from the source cell while communicating with the target cell to complete the handover.

[0048] Various aspects described herein relate to determining power sharing associated with performing a handover procedure. During a handover (HO) based on a dual active protocol stack (DAPS), a user equipment (UE) may communicate with a source cell and a target cell during the HO to receive data from the source cell while concurrently communicating with the target cell to complete the HO. In this regard, the UE may maintain an active protocol stack for each of the source cell and the target cell to communicate with both cells during the HO (e.g., for at least a period of time after initiating the HO from the source cell to the target cell and before completing the HO to the target cell). Although described herein in terms of a source cell and a target cell, the UE may communicate with a corresponding gNB or cell group (or corresponding gNB for a group of cells), such as a master cell group (MCG), when performing the HO. Furthermore, although described herein in terms of a DAPS-based HO, the functionality described herein may be similarly applicable to other types of handovers with multiple active stacks. The UE may therefore determine power sharing for sharing transmit power of the UE transmitter between the source cell and the target cell for uplink (UL) communications during the DAPS-based HO. DAPS-based HO may be applicable to intra-frequency HO, intra-band inter-frequency HO (such as HO between cells at different frequencies but within the same frequency band), and inter-band inter-frequency HO (such as HO between cells at different frequencies within different frequency bands).

[0049] In the fifth generation (5G) New Radio (NR), supported power sharing modes may include semi-static power sharing mode 1, semi-static power sharing mode 2, and dynamic power sharing mode. In semi-static power mode 1, the UE may determine the transmit power for the target MCG or the source MCG as described in clauses 7.1 to 7.5 of the 3rd Generation Partnership Project (3GPP) Technical Specification (TS) 38.213, using P MCG or P SCG As the maximum transmit power. In semi-static power mode 2, if at least one symbol of a timeslot i1 of the source MCG or the target MCG, which is indicated to the UE as uplink or flexible (e.g., by tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated, if provided), overlaps with a symbol for any ongoing transmission in timeslot i2 of the target MCG or the source MCG, respectively, the UE may use P as described in 3GPP TS 38.213 clauses 7.1 to 7.5. MCG or P SCGThe power for transmission on the target MCG or source MCG in time slot i2 is determined to be the maximum transmit power, respectively. For example, a symbol may include an orthogonal frequency division multiplexing (OFDM) symbol, a single carrier frequency division multiplexing (SC-FDM) symbol, etc., and a time slot may include a collection of multiple symbols within a period of time. In semi-static power mode 2, if the symbols do not overlap, the UE may determine the transmit power for the target MCG or source MCG as described in 3GPP TS 38.101-3 and 3GPP TS 38.213 clauses 7.1 to 7.5 without considering P, respectively. MCG or P SCG In dynamic power mode, if a UE transmission in time slot i1 of the target MCG overlaps in time with a UE transmission in time slot i2 of the source MCG, and if in any part of time slot i2 of the source MCG, Then the UE may reduce the transmit power in any part of the time slot i2 of the source MCG so that in all parts of the time slot i2, in and They are the UE transmit power in time slot i1 of the target MCG and time slot i2 of the source MCG, which are the UE using P MCG and P SCG Sure.

[0050] In 5G NR, a UE may indicate its capability in UL power sharing by indicating UplinkPowerSharingDAPS-HO as one of the values {Semi-static-mode1, Semi-static-mode2, Dynamic}, or in some examples, the UE may not provide its UL power sharing capability. Additionally, in 5G NR, the source cell (or MCG) may provide the UL power sharing mode to the UE by indicating UplinkPowerSharingDAPS-HO-mode as one of the values {Semi-static-mode1, Semi-static-mode2, Dynamic}. The capability indication may be conveyed in radio resource control (RRC) layer signaling, medium access control (MAC)-control element (CE), dedicated control signaling, or essentially any signaling between the UE and the source cell (or MCG). When the UE determines that UplinkPowerSharingDAPS-HO-mode matches UplinkPowerSharingDAPS-HO, the UE may use the corresponding power mode to perform power sharing for uplink transmissions to the source cell and the target cell. For example, if the UE indicates UplinkPowerSharingDAPS-HO=Semi-static-mode1 and is provided with UplinkPowerSharingDAPS-HO-mode=Semi-static-mode1, the UE can determine the transmit power for the target MCG or for the source MCG by considering the target MCG as an MCG and the source MCG as an SCG, as described for NR-DC-PC-mode=Semi-static-mode1 in Section 7.6.2 of 3GPP TS 38.213.

[0051] According to various aspects described herein, when the UE determines that UplinkPowerSharingDAPS-HO-mode and UplinkPowerSharingDAPS-HO do not match, the UE may prioritize transmission to the target cell (such as the MCG when determining transmit power), wherein prioritization may include transmitting only to the target cell and not to the source cell for at least a period of time. In another example, when the UE determines that the UplinkPowerSharingDAPS-HO-mode received from the source cell does not match the UplinkPowerSharingDAPS-HO, the UE may regard this as an error condition.

[0052] In another example, in 5G NR, if the UE does not provide an UplinkPowerSharingDAPS-HO capability indication and the UE transmissions on the target cell and the source cell overlap, the UE may perform at least one of the following operations: transmit on the target cell, or cancel the transmission to the source cell. In some aspects, canceling the source cell transmission may not be implemented by all UEs because it may include some complexity in the UE implementation. Therefore, in some other aspects described herein, the UE may indicate to the source cell whether the UE supports the ability to cancel uplink transmissions to the source cell (such as in DAPS-based HO or otherwise). Based on the indicated capability, in the event that the UE is scheduled with overlapping uplink transmissions to the source cell and the target cell, the UE may follow the defined cancellation timeline for canceling the uplink transmission to the source cell, or may treat the overlap as an error case. The UE may indicate this capability for each frequency band, each frequency band combination, each frequency band and frequency band combination, or each frequency band pair of each frequency band combination (or each pair of frequency bands of each frequency band combination).

[0053] Specific implementations of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages. Defining behavior when the capabilities indicated by the UE for a power sharing mode differ from the power sharing mode indicated by the source cell for DAPS-based HO may reduce errors and improve performance. Allowing the UE to indicate its capabilities for canceling uplink transmissions to the source cell (which may affect whether or when the source cell schedules uplink transmissions to the UE to avoid overlapping with the target cell in order to minimize undesirable overlap, in the event that the transmissions overlap with transmissions of the target cell) may also reduce errors and improve performance. Thus, the UE may operate to appropriately handle the above use cases that are not defined for 5G NR in the TS.

[0054] Figure 11 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include a base station 102, a UE 104, an evolved packet core (EPC) 160, or a 5G core (5GC) 190. The base station 102 may include a macro cell (a high-power cellular base station) or a small cell (a low-power cellular base station). A macro cell may include a base station. A small cell may include a femto cell, a pico cell, and a micro cell. In one example, the base station 102 may also include a gNB 180, as further described herein. In one example, in accordance with various aspects described herein, some nodes of the wireless communication system may have a modem 240 and a communication component 242 for determining a power sharing mode for DAPS-based HO, determining whether to cancel uplink transmissions to a source cell based on the power sharing mode, and the like. In one example, in accordance with various aspects described herein, some nodes of the wireless communication system may have a modem 340 and a scheduling component 342 for scheduling uplink transmissions based on a capability indication. Although UE 104 is shown as having a modem 240 and a communication component 242, and base station 102 is shown as having a modem 340 and a scheduling component 342, this is an illustrative example, and substantially any node or type of node may include a modem 240 and a communication component 242 or a modem 340 and a scheduling component 342 to provide the corresponding functionality described herein.

[0055] A base station 102 configured for 4G LTE (which may be collectively referred to as an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (such as using an S1 interface). A base station 102 configured for 5G NR (which may be collectively referred to as a Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a backhaul link 184. The base station 102 may perform one or more of the following functions, among other functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 may communicate with each other over backhaul links 134 (e.g., using an X2 interface) directly or indirectly (e.g., through EPC 160 or 5GC 190). Backhaul links 134 may be wired or wireless.

[0056] Base station 102 can communicate wirelessly with one or more UEs 104. Each of base stations 102 can provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102′ can have a coverage area 110′ that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a Home evolved Node B (eNB) (HeNB), which can provide services to a restricted group, which can be referred to as a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 can include uplink (UL) (also referred to as reverse link) transmissions from UE 104 to base station 102 or downlink (DL) (also referred to as forward link) transmissions from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, which includes spatial multiplexing, beamforming, and / or transmit diversity. The communication link may be through one or more carriers. The base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (such as for x component carriers) for transmission in the DL or UL direction. The carriers may be adjacent to each other or may not be adjacent to each other. The allocation of carriers with respect to DL and UL may be asymmetric (e.g., more or fewer carriers may be allocated for DL than for UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0057] In another example, some UEs 104 can communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 can use the DL / UL WWAN spectrum. The D2D communication link 158 can use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication can be through various wireless D2D communication systems such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, LTE, or NR.

[0058] The wireless communication system may further include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0059] The small cell 102′ can operate in licensed or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102′ can employ NR and use the same 5 GHz unlicensed spectrum used by the Wi-Fi AP 150. The small cell 102′ employing NR in the unlicensed spectrum can improve coverage of the access network or increase the capacity of the access network.

[0060] Base station 102 (whether a small cell 102′ or a large cell (such as a macro base station)) may include an eNB, gNodeB (gNB), or other type of base station. Some base stations (e.g., gNB 180) may operate in the traditional sub-6 GHz spectrum, in millimeter wave (mmW) frequencies, or in near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is the RF portion of the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. Radio waves in this frequency band may be referred to as millimeter waves. Near-mmW may extend down to frequencies of 3 GHz with a wavelength of 100 mm. Super high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communications using mmW / near-mmW wireless frequency bands have extremely high path loss and shorter ranges. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short distance. The base stations 102 referenced herein can include gNB 180.

[0061] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally speaking, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation, among other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, or other IP services. The BM-SC 170 can provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as the entry point for content providers' MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and can be used to schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts specific services, and can be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0062] 5GC 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may communicate with a unified data management unit (UDM) 196. AMF 192 may be a control node for handling signaling between UE 104 and 5GC 190. Typically, AMF 192 may provide QoS flow and session management. User Internet Protocol (IP) packets (such as from one or more UEs 104) may be transmitted through UPF 195. UPF 195 may provide UE IP address allocation for one or more UEs, as well as other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, or other IP services.

[0063] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver functional unit, a basic service set (BSS), an extended service set (ESS), a transmit / receive point (TRP), or some other appropriate terminology. Base station 102 provides an access point to EPC 160 or 5GC 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio unit, a global positioning system, a multimedia device, a video device, a digital audio player (such as an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (such as a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). IoT UEs may include machine type communication (MTC) / enhanced MTC (eMTC, also known as Category (CAT)-M, Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other types of UEs. In the present disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), mMTC (massive MTC), etc., and NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

[0064] In one example, the communication component 242 can indicate a capability for a power sharing mode to a base station 102 (such as a base station 102 providing a primary cell of a source cell or a source cell group) and can receive the indicated power sharing mode from the base station 102. In various aspects described herein, the communication component 242 can determine a function for sending or canceling uplink communications based on whether the indicated capability and the received power sharing mode indication match. In another example, the communication component 242 can indicate to the base station 102 a capability for supporting a timeline for canceling transmissions to the base station 102 in a DAPS-based HO in favor of uplink transmissions to a target cell. In this example, the communication component 242 can determine whether to cancel uplink transmissions to the source cell provided by the base station 102 or to consider an error condition based on the indicated capability and in the event that an uplink transmission scheduled for the source cell overlaps with an uplink transmission scheduled for the target cell in a DAPS-based HO. In another example, scheduling component 342 can receive a capability indication from UE 104 and can determine to schedule resources for uplink transmission (or whether to schedule resources) during DAPS-based HO.

[0065] Now go to Figure 2-7 , various aspects are depicted with reference to one or more components and one or more methods that can perform the actions or operations described herein, where aspects with dashed lines may be optional. Although the following Figure 4-6 The operations described in the foregoing are presented in a particular order or performed by exemplary components, but it should be understood that the ordering of the actions and the components that perform the actions may vary depending on the implementation. Furthermore, it should be understood that the following actions, functions, or components described may be performed by a specially programmed processor, a processor for executing specially programmed software or computer-readable media, or any other combination of hardware components or software components capable of performing the described actions or functions.

[0066] Figure 2 An example of a user equipment (UE) 104 is shown. The UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 212 and memory 216 in communication via one or more buses 244, and a transceiver 202, which may operate in conjunction with a modem 240 or a communication component 242 for determining a power sharing mode for DAPS-based HO, determining whether to cancel uplink transmissions to a source cell based on the power sharing mode, and the like, as described herein.

[0067] In one aspect, the one or more processors 212 may include or be part of a modem 240 using one or more modem processors. Thus, various functions associated with the communication component 242 may be included in the modem 240 or the processor 212 and, in one aspect, may be performed by a single processor, while in other aspects, different ones of these functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 212 may include any one or any combination of the following: a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receive processor, or a transceiver processor associated with the transceiver 202. In other aspects, some of the features of the one or more processors 212 or the modem 240 associated with the communication component 242 may be performed by the transceiver 202.

[0068] In addition, the memory 216 can be configured to store data used herein or local versions of the applications 275 executed by the at least one processor 212 or one or more subcomponents of the communication component 242 or its subcomponents. The memory 216 can include any type of computer-readable medium usable by a computer or the at least one processor 212, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, the memory 216 can be a non-transitory computer-readable storage medium storing one or more computer-executable codes that define the communication component 242 or one or more subcomponents thereof, or data associated therewith, when the UE 104 is operating the at least one processor 212 to execute one or more subcomponents of the communication component 242 or its subcomponents.

[0069] The transceiver 202 may include at least one receiver 206 and at least one transmitter 208. The receiver 206 may include hardware for receiving data or software executable by a processor, the code including instructions and stored in a memory (such as a computer-readable medium). The receiver 206 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 206 may receive signals transmitted by at least one base station 102. In addition, the receiver 206 may process such received signals and may also obtain measurements of the signals, such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. The transmitter 208 may include hardware for transmitting data or software executable by a processor, the code including instructions and stored in a memory (such as a computer-readable medium). Suitable examples of the transmitter 208 may include, but are not limited to, an RF transmitter.

[0070] Furthermore, in one aspect, the UE 104 may include an RF front end 288 that may operate in communication with the one or more antennas 265 and the transceiver 202 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 288 may be connected to the one or more antennas 265 and may include one or more low noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.

[0071] In one aspect, the LNAs 290 can amplify the received signal to a desired output level. In one aspect, each LNA 290 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application.

[0072] Furthermore, for example, the RF front end 288 can use one or more PAs 298 to amplify the signal for RF output to a desired output power level. In one aspect, each PA 298 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application.

[0073] Furthermore, for example, the RF front end 288 can use one or more filters 296 to filter a received signal to obtain an input RF signal. Similarly, in one aspect, for example, a corresponding filter 296 can be used to filter the output from a corresponding PA 298 to produce an output signal for transmission. In one aspect, each filter 296 can be connected to a specific LNA 290 or PA 298. In one aspect, the RF front end 288 can use one or more switches 292 to select a transmit path or a receive path using a specific filter 296, LNA 290, or PA 298 based on the configuration specified by the transceiver 202 and / or the processor 212.

[0074] Thus, the transceiver 202 may be configured to transmit and receive wireless signals via the RF front end 288 through the one or more antennas 265. In one aspect, the transceiver may be tuned to operate at a specified frequency so that the UE 104 can communicate with, for example, one or more base stations 102 or one or more cells associated with the one or more base stations 102. In one aspect, the modem 240 may configure the transceiver 202 to operate at a specified frequency and power level based on, for example, the UE configuration of the UE 104 and the communication protocol used by the modem 240.

[0075] In one aspect, the modem 240 can be a multi-band, multi-mode modem that can process digital signals and communicate with the transceiver 202 so that digital data is sent and received using the transceiver 202. In one aspect, the modem 240 can be multi-band and can be configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 240 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 240 can control one or more components of the UE 104 (such as the RF front end 288, the transceiver 202) based on a specified modem configuration to enable transmission or reception of signals from the network. In one aspect, the modem configuration can be based on the mode of the modem and the frequency band in use. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104 (such as provided by the network during cell selection or cell reselection).

[0076] In one aspect, communication component 242 may optionally include a capability indicating component 252 for indicating a capability of a power sharing mode supported for DAPS-based HO or indicating a capability for supporting a timeline for canceling uplink transmissions to the source cell; a DAPS mode component 254 for determining a power sharing mode for DAPS-based HO; or a cancelling component 256 for canceling uplink transmissions to the source cell based on the indicated capability, as described herein.

[0077] In one aspect, the processor 212 may correspond to Figure 7 Similarly, the memory 216 may correspond to one or more processors in conjunction with the UE described in the embodiment of the present invention. Figure 7 The memory described by the UE in .

[0078] Figure 3 An example of a base station 102 (or gNB 180 as described above) is shown. Base station 102 may include various components, some of which have been described above, but includes components such as one or more processors 312 and memory 316 communicating via one or more buses 344, and a transceiver 302, which may operate in conjunction with a modem 340 and a scheduling component 342 for scheduling uplink transmissions based on capability indications in accordance with various aspects described herein.

[0079] The transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, applications 375, bus 344, RF front end 388, LNA 390, switch 392, filter 396, PA 398, and one or more antennas 365 may be the same as or similar to the corresponding components of the UE 104 described above, but configured or otherwise programmed for base station operation as opposed to UE operation.

[0080] In an aspect, scheduling component 342 can optionally include capability determining component 352 for determining capability of UE 104 to support cancellation of scheduled uplink transmissions in DAPS-based HO according to aspects described herein.

[0081] In one aspect, processor 312 may correspond to Figure 7 Similarly, the memory 316 may correspond to one or more processors in conjunction with the base station described in the embodiment of the present invention. Figure 7 The memory of the base station description in.

[0082] Figure 4An example of a flow chart 400 for determining a power sharing mode for HO based on a dual active protocol stack (DAPS) is shown. In one example, the UE 104 may use Figure 1 and Figure 2 One or more of the components described in the flowchart 400 may be used to perform the functions described in the flowchart 400.

[0083] At block 402, a first indication of a first power sharing mode supported for DAPS-based HO can be sent to a source cell. In one aspect, capability indication component 252 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) can send a first indication of a first power sharing mode supported for DAPS-based HO to the source cell. For example, capability indication component 252 can send the indication to the source cell as part of indicating other capability information to the source cell, which can include sending the indication via RRC signaling, MAC-CE, dedicated control signaling, or based on a request for UE capability information from the source cell. Furthermore, for example, the first indication can include selecting a power sharing mode from one of semi-static power sharing mode 1, semi-static power sharing mode 2, or dynamic power sharing mode as described above.

[0084] At block 404, a second indication of a source power sharing mode for a DAPS-based HO to a target cell may be received from the source cell. In one aspect, DAPS mode component 254 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) may receive a second indication of a second power sharing mode for a DAPS-based HO to a target cell from the source cell. In one example, DAPS mode component 254 may receive the second indication from the source cell, for example, in a configuration or other information received at the time of handover as part of a HO procedure to handover UE 104 communications from the source cell (or source MCG) to the target cell (or target MCG). For example, DAPS mode component 254 may receive the configuration in RRC signaling (such as part of a handover procedure or otherwise), MAC-CE, dedicated control signaling, etc. from the source cell. Additionally, for example, DAPS mode component 254 may receive the second indication from a base station (such as a gNB) associated with the source cell (or source MCG). In the event that the first power sharing mode matches the second power sharing mode, the DAPS mode component 254 can operate in the power sharing mode to perform power sharing to share transmit power for uplink transmissions to the source cell and the target cell in overlapping resources during the DAPS-based HO. Furthermore, for example, the second indication can include selecting a power sharing mode from one of the semi-static power sharing mode 1, the semi-static power sharing mode 2, or the dynamic power sharing mode described above. For example, uplink transmissions can overlap in the time domain so that the uplink transmissions can be sent concurrently, and the UE 104 can apply power sharing to split transmit power between each of a plurality of protocol stacks used to respectively send uplink transmissions.

[0085] At block 406, it may be determined that the first power sharing mode is different from the second power sharing mode. In one aspect, the DAPS mode component 254 (such as in combination with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc.) may determine that the first power sharing mode is different from the second power sharing mode. For example, the DAPS mode component 254 may determine that the enumeration value for the first power sharing mode in the first indication is different from the enumeration value for the second power sharing mode received in the second indication. In this case, the UE 104 may determine how to handle the difference in power sharing modes.

[0086] Optionally, at block 408 and based on determining a difference in power sharing modes, transmissions may be performed to the target cell during the DAPS-based HO at least if uplink transmissions to the target cell and the source cell overlap. In one aspect, communication component 242 (e.g., in combination with processor 212, memory 216, transceiver 202, etc.) may transmit to the target cell during the DAPS-based HO at least if uplink transmissions to the target cell and the source cell overlap. For example, communication component 242 may determine that an uplink transmission (e.g., a data transmission) scheduled for the source cell and an uplink transmission (e.g., a portion of a handover) scheduled for the target cell overlap, where the overlap may be in time or frequency resources. For example, if the carrier frequencies for the target cell (or MCG) and the source cell (or MCG) are intra-frequency and intra-band, communication component 242 may determine that the transmissions overlap if the transmissions are scheduled in overlapping time resources. For example, if the carrier frequencies for the target cell (or MCG) and the source cell (or MCG) are not intra-frequency and intra-band, etc., the communication component 242 can determine that the transmissions overlap if the transmissions are scheduled in overlapping time resources and overlapping frequency resources. In such an example, and if the power sharing modes do not match, the communication component 242 can determine to transmit to the target cell. For example, transmitting to the target cell can include prioritizing transmissions to the target cell, which, as described herein, can include transmitting only to the target cell and not to the source cell for at least a time period, canceling uplink transmissions (or at least overlapping portions) scheduled to the source cell in favor of uplink transmissions scheduled to the target cell, etc.

[0087] When transmitting to the target cell at box 408, optionally at box 410, the uplink transmission to the source cell can be canceled. In one aspect, the cancellation component 256 (such as in combination with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc.) can cancel the uplink transmission to the source cell. For example, where the communication component 242 schedules an uplink transmission to the source cell based on a scheduling grant from the source cell, and then schedules an uplink transmission to the target cell in at least partially overlapping resources based on a scheduling grant from the target cell, the communication component 242 can determine to cancel and not send the uplink transmission to the source cell. In one example, the cancellation component 256 can cancel the entire uplink transmission to the source cell, or can cancel at least a portion of the uplink transmission to the source cell (e.g., a portion on resources that interfere with the uplink transmission scheduled for the target cell).

[0088] When transmitting to the target cell at block 408, optionally at block 412, transmission may be performed to the target cell and not to the source cell for at least a time period. In one aspect, communication component 242 (such as in combination with processor 212, memory 216, transceiver 202, etc.) may transmit to the target cell and not to the source cell for at least a time period. For example, communication component 242 may ignore a scheduling grant received from the source cell for uplink communications corresponding to the time period, or may otherwise avoid transmitting uplink communications to the source cell on scheduled uplink resources during the time period. In one example, communication component 242 may determine the time period based on DAPS-based HO to include at least a portion of the DAPS-based HO procedure. In a specific example, the time period may include a time period after performing a random access procedure with the target cell and until a connection is established with the target cell during the DAPS-based HO.

[0089] When transmitting to the target cell at block 408, optionally at block 414, transmission may be performed to the target cell and the source cell based on the first power sharing mode or the second power sharing mode. In one aspect, the communication component 242 (e.g., in combination with the processor 212, the memory 216, the transceiver 202, etc.) may transmit to the target cell based on the first power sharing mode or the second power sharing mode. For example, if the DAPS mode component 254 determines that the first power sharing mode and the second power sharing mode are different, the DAPS mode component 254 may select one of the power sharing modes to use when communicating with the target cell and the source cell. In one example, the selection may be based on an implementation of the UE 104 (such as instructions stored in the memory 216 indicating whether to select a UE-indicated or network-indicated power sharing mode (if they are different)). In another example, the selection may be based on a configuration received from the network indicating which power sharing mode to prefer (such as a UE-indicated power sharing mode or a network-indicated power sharing mode). In these examples, a determination can optionally be made whether to use the first power sharing mode or the second power sharing mode at block 416. In one aspect, DAPS mode component 254 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) can determine whether to use the first power sharing mode or the second power sharing mode, and communication component 242 can use the selected power sharing mode to concurrently send uplink communications to the target cell and the source cell, as described above.

[0090] Optionally, at block 418 and based on determining the difference in power sharing modes in another example, a configuration error can be indicated. In one aspect, the communication component 242 (such as in combination with the processor 212, the memory 216, the transceiver 202, etc.) can indicate a configuration error because the UE may not expect the configuration if the power sharing modes do not match. In one example, the communication component 242 can report the configuration error to upper layers of the UE 104 (such as a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, an application layer, etc.), can report the configuration error to the source cell, can suspend or terminate communications with the source cell based on determining the configuration error, and so on.

[0091] Figure 5 An example of a flow chart 500 for indicating whether the capability to cancel uplink transmission in a DAPS-based HO is supported is shown. In one example, the UE 104 may use Figure 1 and 2 One or more of the components described in the flowchart 500 may be used to perform the functions described in the flowchart 500.

[0092] Optionally, at block 502, an indication can be sent to the source cell regarding whether cancellation of uplink transmissions in a DAPS-based HO is supported. In one aspect, capability indication component 252 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) can send an indication to the source cell regarding whether cancellation of uplink transmissions in a DAPS-based HO is supported. For example, capability indication component 252 can send the indication to the source cell as part of indicating other capability information to the source cell, which can include sending the indication via RRC signaling, based on a request for UE capability information from the source cell, and so on. In one example, the indication can be an indication that UE 104 is capable of supporting cancellation of uplink transmissions to the source cell (or a corresponding timeline for canceling uplink transmissions to the source cell). In another example, the indication can be an indication that UE 104 does not support cancellation of uplink transmissions to the source cell. In either example, capability indicating component 252 may or may not send the indication to the source cell (e.g., to indicate that UE 104 supports or does not support canceling uplink transmissions to the source cell). Additionally, for example, the capability may relate to whether UE 104 can support canceling uplink transmissions to the source cell during DAPS-based HO.

[0093] As described above, in one example, if UE 104 does not provide UplinkPowerSharing DAPS-HO and UE transmissions on the target cell and source cell overlap, the UE may transmit only on the target cell (causing transmissions to the source cell to be dropped / canceled). Depending on the target cell UL traffic type, a timeline for canceling UL transmissions to the source cell may be required (e.g., when UL transmissions to the source cell are canceled). The UE may have an ongoing UL transmission to the source cell and may receive an UL schedule for UL Tx to the target cell. If the UL schedule for UL transmissions to the target cell is semi-static, the UE may know the scheduled UL in advance and a timeline may not be necessary. On the other hand, if the UL schedule for UL transmissions to the target cell is dynamic, such as scheduled by downlink control information (DCI) received from the source cell, a timeline for canceling uplink transmissions to the source cell may be used. However, tracking such a timeline may require additional functionality of the UE implementation, which may not be available to all UEs. Therefore, the communication component 242 may indicate the capability or not, as described above and further herein.

[0094] In addition, the capability indicating component 252 can indicate the capability for each frequency band, each frequency band combination, each frequency band and frequency band combination, or each frequency band pair of each frequency band combination (such as in one or more transmissions). In one example, the communication component 242 can receive a configuration of frequency bands that can be used for communicating with a source cell or for handover from a source cell, and the capability indicating component 252 can indicate whether to support cancellation of uplink transmissions to the source cell for each frequency band in a plurality of (or all possible) frequency bands, each frequency band combination in a plurality of possible frequency band combinations, each frequency band and frequency band combination in a plurality of frequency bands and frequency band combinations, or a frequency band pair for each frequency band combination. For example, the frequency band can be related to a frequency band used by the source cell or related to a frequency band used by the target cell, and the frequency band pair can be related to a frequency band used by the source cell and the target cell.

[0095] At block 504, an uplink scheduling grant may be received from the source cell for scheduling a first uplink transmission during a DAPS-based HO. In one aspect, the communication component 242 (such as in combination with the processor 212, the memory 216, the transceiver 202, etc.) may receive an uplink scheduling grant from the source cell for scheduling a first uplink transmission during a DAPS-based HO. As described above, during a DAPS-based HO, when a DAPS-based HO occurs with a target cell, the source cell may schedule the UE 104 for an uplink data transmission to the source cell. However, based on the capability that may be indicated to cancel the uplink transmission to the source cell, the UE 104 may or may not expect to receive the uplink scheduling grant and may handle the uplink transmission accordingly if the uplink scheduling grant overlaps with resources scheduled for transmission to the target cell during the DAPS-based HO.

[0096] Optionally, at block 506, at least a portion of the first uplink transmission can be canceled. In one aspect, canceling component 256 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) can cancel at least a portion of the first uplink transmission. For example, canceling component 256 can cancel at least a portion of the first uplink transmission if at least a portion of the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell during a DAPS-based HO.

[0097] Optionally, in one example, at block 508, it can be determined that the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell. In one aspect, cancellation component 256 (such as in combination with processor 212, memory 216, transceiver 202, communication component 242, etc.) can determine the overlap based on receiving an uplink grant (such as on a DCI from the source cell) for scheduling the first uplink transmission or receiving an uplink grant for scheduling the second uplink transmission with the target cell. Cancellation component 256 can determine that the uplink resources indicated by the uplink grant overlap with uplink resources scheduled by the target cell for HO-related communications from UE 104, where communication component 242 can determine the overlap as being in time resources or frequency resources. For example, as described above, if the carrier frequencies used for the target MCG and the source MCG are intra-frequency and intra-band, cancellation component 256 can determine the overlap for overlapping time resources. In another example, if the carrier frequencies for the target MCG and the source MCG are not intra-frequency, intra-band, etc., then the cancellation component 256 can determine overlap for overlapping time resources and overlapping frequency resources.

[0098] In one example, if the capability indicating component 252 indicates an ability to cancel an uplink transmission in a DAPS-based HO (or based on determining that the capability indicating component 252 indicates an ability to cancel an uplink transmission in a DAPS-based HO) (such as in block 502), the canceling component 256 may cancel at least a portion of the first uplink transmission. For example, if the indication relates to the UE being able to support cancellation of UL transmissions to the source cell, and the capability indicating component 252 indicates this capability via a transmission at block 502, the canceling component 256 may cancel (or determine to cancel) the first uplink transmission to the source cell (or at least a portion thereof, as described above) if the first uplink transmission overlaps with the second uplink transmission. Similarly, if the indication relates to the UE not supporting cancellation of UL transmissions to the source cell, and the capability indicating component 252 does not indicate this capability of not supporting cancellation via a transmission at block 502 (such as if the UE supports cancellation), the canceling component 256 may cancel (or determine to cancel) the first uplink transmission to the source cell (or at least a portion thereof, as described above) if the first uplink transmission overlaps with the second uplink transmission. In either case, canceling component 256 can follow a defined timeline for canceling uplink transmissions to the source cell.

[0099] Optionally, at block 510, a configuration error can be indicated. In one aspect, communication component 242 (such as in combination with processor 212, memory 216, transceiver 202, etc.) can indicate a configuration error. For example, communication component 242 can indicate a configuration error if at least a portion of a first uplink transmission overlaps with a second uplink transmission scheduled by a target cell during a DAPS-based HO.

[0100] Alternatively, in one example, at block 512, it may be determined that the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell. In one aspect, communication component 242 (such as in combination with processor 212, memory 216, transceiver 202, etc.) may determine the overlap based on receiving an uplink grant (such as on a DCI from the source cell) for scheduling the first uplink transmission or receiving an uplink grant for scheduling the second uplink transmission with the target cell. Additionally, for example, indicating a configuration error may be based on the capability transmitted (or not transmitted) at block 502.

[0101] For example, if the capability is related to the UE being able to support cancellation of UL transmissions to the source cell, and the capability indication component 252 does not indicate this capability by the transmission at block 502, in the case where the first uplink transmission overlaps with the second uplink transmission, the communication component 242 can determine and indicate this scenario as a configuration error. This can be indicated as a configuration error because, in this example, the UE 104 does not expect to receive an uplink grant with overlapping resources. Similarly, if the capability is related to the UE being able to support cancellation of UL transmissions to the source cell, and the capability indication component 252 indicates this capability of not supporting cancellation by the transmission at block 502 (such as the UE does not support cancellation), in the case where the first uplink transmission overlaps with the second uplink transmission, the communication component 242 can determine and indicate this scenario as a configuration error. This can be indicated as a configuration error because, in this example, the UE 104 does not expect to receive an uplink grant with overlapping resources. In one example, based on determining a configuration error, communicating component 242 can report the configuration error to upper layers of UE 104, can report the configuration error to a source cell, can suspend or terminate communications with the source cell, and so on.

[0102] In addition, as mentioned above Figure 4 As described, canceling at least a portion of the first uplink transmission or indicating a configuration error may also be based on a supported power sharing mode sent by the UE 104 to the source cell, a second power sharing mode received from the source cell, and the like.

[0103] Figure 6 An example of a flowchart 600 for scheduling uplink transmissions based on whether the capability to cancel uplink transmissions in DAPS-based HO is supported is shown. In one example, the base station 102 may use Figure 1 and Figure 3 One or more of the components described in the flowchart 600 may be used to perform the functions described in the flowchart 600. For example, the base station 102 performing the functions may include a base station or gNB that provides a source cell (or MCG) to the UE 104.

[0104] At block 602, an indication may be received from a UE regarding support for canceling uplink transmissions in a DAPS-based HO. In one aspect, capability determining component 352 (such as in combination with processor 312, memory 316, transceiver 302, scheduling component 342, etc.) may receive an indication from a UE (such as UE 104) regarding support for canceling uplink transmissions in a DAPS-based HO. For example, capability determining component 352 may receive the indication from the UE as part of the UE indicating other capability information to a source cell, which may include receiving the indication based on a request for UE capability information from the source cell via RRC signaling, etc. In one example, the indication may be an indication that UE 104 is capable of supporting canceling uplink transmissions to the source cell (or a corresponding timeline for canceling uplink transmissions to the source cell). In another example, the indication may be an indication that UE 104 does not support canceling uplink transmissions to the source cell. Furthermore, for example, the capability may relate to whether the UE 104 can support cancellation of uplink transmissions to the source cell during DAPS-based HO.

[0105] In addition, the capability determining component 352 can receive an indication of capability (such as in one or more transmissions) for each frequency band, each frequency band combination, each frequency band and frequency band combination, or each frequency band pair for each frequency band combination. In one example, the scheduling component 342 can send to the UE a configuration of frequency bands that can be used for communication with the source cell or for handover from the source cell, and the capability determining component 352 can receive an indication of whether the UE supports cancellation of uplink transmissions to the source cell for each frequency band in a plurality of (or all possible) frequency bands, each frequency band combination in a plurality of possible frequency band combinations, each frequency band and frequency band combination in a plurality of frequency bands and frequency band combinations, or a frequency band pair for each frequency band combination. For example, the frequency band can be related to a frequency band used by the source cell or related to a frequency band used by the target cell, and the frequency band pair can be related to a frequency band used by the source cell and the target cell.

[0106] Optionally, at block 604, uplink transmissions may be scheduled for the UE during the DAPS-based HO. In one aspect, scheduling component 342 (such as in combination with processor 312, memory 316, transceiver 302, etc.) may schedule uplink transmissions for the UE during the DAPS-based HO. As described above, during the DAPS-based HO, when a DAPS-based HO with a target cell occurs, the source cell may schedule UE 104 for uplink data transmission to the source cell. However, based on the capability that may be indicated for canceling uplink transmissions to the source cell, UE 104 may or may not expect to receive an uplink scheduling grant and may handle the uplink transmission accordingly if the uplink scheduling grant overlaps with resources scheduled for transmission to the target cell during the DAPS-based HO. Thus, if the uplink transmission overlaps with a second uplink transmission scheduled by the target cell (which at least partially overlaps with an uplink transmission scheduled by the source cell), the source cell may cancel the uplink transmission depending on the UE.

[0107] Optionally, at block 606, scheduling uplink transmissions for the UE can be avoided. In one aspect, scheduling component 342 (such as in combination with processor 312, memory 316, transceiver 302, etc.) can avoid scheduling uplink transmissions for the UE. However, based on not receiving the indicated capability to cancel uplink transmissions to the source cell, UE 104 may or may not desire to receive an uplink scheduling grant for uplink transmissions to the source cell that overlap with resources scheduled for transmission to the target cell during DAPS-based HO. Therefore, in this case, the source cell can avoid scheduling such uplink transmissions for the UE, as described above.

[0108] In addition, as mentioned above Figure 4 As described, whether to schedule or avoid scheduling uplink transmissions may also be based on a supported power sharing mode sent by the UE 104 to the source cell, a second power sharing mode indicated by the source cell, and the like.

[0109] Figure 7 1 shows a block diagram of an example communication system 700 including a base station 102 and a UE 104. The communication system 700 may be shown with reference to Figure 1 The base station 102 may be a reference to a wireless communication access network 100. Figure 1 Examples of various aspects of base station 102 are described. Additionally, UE 104 can communicate with another UE on sidelink resources using similar functionality as described herein with respect to communication between UE 104 and base station 102.

[0110] Base station 102 may be equipped with antennas 734 and 735, and UE 104 may be equipped with antennas 752 and 753. In MIMO communication system 700, base station 102 is capable of transmitting data simultaneously over multiple communication links. Each communication link may be referred to as a "layer," and the "rank" of a communication link may indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system in which base station 102 transmits two "layers," the rank of the communication link between base station 102 and UE 104 is two.

[0111] At the base station 102, a transmit (Tx) processor 720 may receive data from a data source. The transmit processor 720 may process the data. The transmit processor 720 may also generate control symbols or reference symbols. The transmit MIMO processor 730 may perform spatial processing (such as precoding) on the data symbols, control symbols, or reference symbols (if applicable), and may provide an output symbol stream to transmit modulators / demodulators 732 and 733. Each modulator / demodulator 732 to 733 may process a corresponding output symbol stream (such as for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 732 to 733 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. In one example, the DL signals from the modulators / demodulators 732 and 733 may be transmitted via antennas 734 and 735, respectively.

[0112] UE 104 may be a reference Figure 1 and 2 Examples of various aspects of the UE 104 are described. At the UE 104, the UE antennas 752 and 753 can receive DL signals from the base station 102 and can provide the received signals to the demodulators / demodulators 754 and 755, respectively. Each demodulator / demodulator 754 to 755 can condition (e.g., filter, amplify, downconvert, and digitize) the corresponding received signal to obtain input samples. Each demodulator / demodulator 754 to 755 can further process the input samples (such as for OFDM, etc.) to obtain received symbols. The MIMO detector 756 can obtain received symbols from the demodulators 754 and 755, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive (Rx) processor 758 can process (such as demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data output, and provide decoded control information to the processor 780 or the memory 782.

[0113] In some cases, the processor 780 may execute stored instructions to connect the communication component 242 (see, for example, Figure 1 and 2 ) instantiated.

[0114] On the uplink (UL), at the UE 104, a transmit processor 764 may receive data from a data source and process the data. The transmit processor 764 may also generate reference symbols for a reference signal. The symbols from the transmit processor 764 may be precoded by a transmit MIMO processor 766 (if applicable), further processed by modulators / demodulators 754 and 755 (such as for SC-FDMA, etc.), and transmitted to the base station 102 based on communication parameters received from the base station 102. At the base station 102, the UL signals from the UE 104 may be received by antennas 734 and 735, processed by demodulators / demodulators 732 and 733, detected by a MIMO detector 736 (if applicable), and further processed by a receive processor 738. The receive processor 738 may provide decoded data to a data output and to a processor 740 or a memory 742.

[0115] In some cases, the processor 740 may execute stored instructions to schedule the component 342 (see, for example, Figure 1 and 3 ) instantiated.

[0116] The components of the UE 104 may be implemented, individually or collectively, with one or more application-specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Each of the modules mentioned may be a means for performing one or more functions associated with the operation of the MIMO communication system 700. Similarly, the components of the base station 102 may be implemented, individually or collectively, with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Each of the modules mentioned may be a means for performing one or more functions associated with the operation of the MIMO communication system 700.

[0117] The following aspects are merely illustrative, and aspects thereof may be combined with aspects of other implementations or teachings described herein, but are not limited thereto.

[0118] Aspect 1 is a method for wireless communication at a device of a UE, comprising: sending a first indication of a first power sharing mode supported for DAPS-based HO to a source cell; receiving a second indication of a second power sharing mode for DAPS-based handover to a target cell from the source cell; and performing at least one of the following operations based on determining that the first power sharing mode is different from the second power sharing mode: sending to the target cell during the DAPS-based HO if UL transmissions to the target cell and the source cell overlap; or indicating a configuration error.

[0119] In aspect 2, the method according to aspect 1 includes: wherein sending to the target cell includes: sending to the target cell and not sending to the source cell for at least a period of time after performing a random access procedure with the target cell and until a connection is established with the target cell.

[0120] In aspect 3, the method according to any one of aspects 1 or 2 includes: wherein transmitting to the target cell includes canceling a scheduled uplink transmission to the source cell during the DAPS based HO.

[0121] In aspect 4, the method according to any one of aspects 1 to 3 includes: wherein transmitting to the target cell is based on determining that transmissions to the target cell and the source cell overlap in resources in time or frequency or both time and frequency.

[0122] In aspect 5, the method according to any one of aspects 1 to 4 includes determining whether to use the first power sharing mode or the second power sharing mode based on determining that the first power sharing mode is different from the second power sharing mode.

[0123] In aspect 6, the method according to aspect 5 includes: wherein determining whether to use the first power sharing mode or the second power sharing mode includes determining to use the first power sharing mode, and wherein transmitting to the target cell includes: transmitting to the target cell and the source cell based on the first power sharing mode.

[0124] In aspect 7, the method according to aspect 5 includes: wherein determining whether to use the first power sharing mode or the second power sharing mode includes determining to use the second power sharing mode, and wherein transmitting to the target cell includes: transmitting to the target cell and the source cell based on the second power sharing mode.

[0125] In aspect 8, the method according to any one of aspects 1 to 7 includes: wherein indicating the configuration error includes reporting the configuration error to an upper layer.

[0126] Aspect 9 is a method for wireless communication at a device of a UE, comprising: receiving an uplink grant for scheduling a first uplink transmission during a DAPS-based HO from a source cell; determining that the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell; and determining whether to cancel at least a portion of the first uplink transmission based at least in part on determining that the first uplink transmission overlaps with the second uplink transmission and at least in part on whether to send an indication to the source cell regarding whether to support cancellation of uplink transmission in the DAPS-based HO.

[0127] In aspect 10, the method according to aspect 9 includes sending an indication to the source cell regarding whether cancellation of uplink transmission in DAPS based HO is supported.

[0128] In aspect 11, the method according to aspect 10 includes: wherein the indication indicates support for canceling uplink transmission to the source cell, and wherein determining whether to cancel at least a portion of the first uplink transmission includes: determining to cancel at least a portion of the first uplink transmission based on a cancellation timeline.

[0129] In aspect 12, the method of aspect 10 includes wherein the indication indicates that canceling the uplink transmission to the source cell is not supported, and further includes indicating a configuration error based at least in part on determining that the first uplink transmission overlaps with the second uplink transmission.

[0130] In aspect 13, the method according to any one of aspects 9 or 11 includes: wherein the indication indicates support for canceling uplink transmission to the source cell, and the indication is not sent to the source cell, and also includes: indicating a configuration error at least in part based on determining that the first uplink transmission overlaps with the second uplink transmission.

[0131] In aspect 14, the method according to any one of aspects 9, 10 or 12 includes: wherein the indication indicates that cancellation of uplink transmission to the source cell is not supported, and the indication is not sent to the source cell, and wherein determining whether to cancel at least part of the first uplink transmission includes: determining to cancel at least part of the first uplink transmission based on a cancellation timeline.

[0132] In aspect 15, the method according to any one of aspects 9 to 14 includes sending to the source cell an indication related to cancellation of uplink transmission to the source cell for each frequency band and frequency band combination, or each pair of frequency bands in each frequency band combination.

[0133] Aspect 16 is an apparatus for wireless communication, comprising: a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to perform operations according to one or more methods in Aspects 1-15.

[0134] Aspect 17 is an apparatus for wireless communication comprising means for performing operations according to one or more methods of aspects 1-15.

[0135] Aspect 18 is a computer-readable medium comprising code executable by one or more processors to perform operations according to one or more methods of aspects 1-15.

[0136] Aspect 19 is an apparatus for wireless communication, comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: send a signal to a source cell indicating whether a capability to cancel uplink transmissions to the source cell in a DAPS-based HO is supported; receive an uplink grant from the source cell for scheduling a first uplink transmission during the DAPS-based HO; and cancel at least a portion of the first uplink transmission if the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell.

[0137] In aspect 20, the apparatus of aspect 19 includes wherein the first uplink transmission and the second uplink transmission are in overlapping time resources.

[0138] In aspect 21, the apparatus according to any one of aspects 19 or 20 includes wherein the one or more processors are configured to cancel at least a portion of the first uplink transmission based on a cancellation timeline.

[0139] In aspect 22, the apparatus according to any one of aspects 19 to 21 includes: wherein the one or more processors are further configured to: send the second uplink transmission to the target cell if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell and if the capability indication supports cancellation of the uplink transmission to the source cell in DAPS-based HO.

[0140] In aspect 23, the apparatus according to any one of aspects 19 to 22 includes: wherein the one or more processors are configured to: cancel at least a portion of the first uplink transmission if the apparatus does not indicate the second capability for power sharing.

[0141] In aspect 24, the apparatus according to any one of aspects 19 to 23 comprises: wherein the one or more processors are configured to: cancel at least a portion of the first uplink transmission if the apparatus does not receive an indication for power sharing.

[0142] In aspect 25, the apparatus according to aspect 19 includes: wherein the one or more processors are further configured to: indicate a configuration error to at least the source cell if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell and if the capability indication does not support cancellation of the uplink transmission to the source cell in the DAPS-based HO.

[0143] In aspect 26, the apparatus of aspect 25 comprises: wherein the one or more processors are configured to indicate a configuration error if the apparatus does not indicate the second capability for power sharing.

[0144] In aspect 27, the apparatus of aspect 25 comprises: wherein the one or more processors are configured to indicate a configuration error if the apparatus does not receive an indication for power sharing.

[0145] In aspect 28, the apparatus according to any one of aspects 19 to 27 includes: wherein the capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS based HO is supported.

[0146] Aspect 29 is an apparatus for wireless communication, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: receive a capability from a UE indicating whether to support canceling uplink transmissions from a source cell in a DAPS-based HO; and, if the capability indicates support for canceling uplink transmissions from the source cell in a DAPS-based HO, schedule uplink transmissions to a target cell for the UE during the DAPS-based HO.

[0147] In aspect 30, the apparatus according to aspect 29 includes: wherein the one or more processors are configured to: if the capability indication does not support cancellation of uplink transmission from the source cell in DAPS-based HO, avoid scheduling uplink transmission for the UE if the uplink transmission overlaps with a second uplink transmission scheduled by the target cell for the UE during the DAPS-based HO.

[0148] In aspect 31, the apparatus of aspect 30 includes wherein the uplink transmission and the second uplink transmission are in overlapping time resources.

[0149] In aspect 32, the apparatus according to any one of aspects 30 or 31 includes: wherein the one or more processors are configured to: avoid scheduling uplink transmission if the UE sends the second capability for power sharing.

[0150] In aspect 33, the apparatus according to any one of aspects 30 to 32 includes: wherein the one or more processors are configured to: avoid scheduling uplink transmission if the apparatus sends an indication of power sharing to the UE.

[0151] In aspect 34, the apparatus according to any one of aspects 29 to 33 includes: wherein the capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS based HO is supported.

[0152] Aspect 35 is a method for wireless communication at a device of a UE, comprising: sending a capability to a source cell indicating whether to support cancelling uplink transmission to the source cell in a DAPS-based HO; receiving an uplink grant from the source cell for scheduling a first uplink transmission during the DAPS-based HO; and cancelling at least a portion of the first uplink transmission if the first uplink transmission overlaps with a second uplink transmission scheduled by a target cell.

[0153] In aspect 36, the method of aspect 35 includes wherein the first uplink transmission and the second uplink transmission are in overlapping time resources.

[0154] In aspect 37, the method according to any one of aspects 35 or 36 includes wherein cancelling at least a portion of the first uplink transmission is based on a cancellation timeline.

[0155] In aspect 38, the method according to any one of aspects 35 to 37 includes: in a case where the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell, and in a case where the capability indication supports cancellation of the uplink transmission to the source cell in DAPS based HO, sending the second uplink transmission to the target cell.

[0156] In aspect 39, the method according to any one of aspects 35 to 38 includes performing, if the UE does not indicate a second capability for power sharing, cancelling at least a portion of the first uplink transmission.

[0157] In aspect 40, the method according to any one of aspects 35 to 39 includes performing, in a case where the UE does not receive an indication for power sharing, cancelling at least a portion of the first uplink transmission.

[0158] In aspect 41, the method according to aspect 35 includes indicating a configuration error to at least the source cell if the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell and if the capability indication does not support cancellation of uplink transmission to the source cell in DAPS based HO.

[0159] In aspect 42, the method according to aspect 41 includes performing indicating a configuration error if the UE does not indicate the second capability for power sharing.

[0160] In aspect 43, the method according to aspect 41 includes performing indicating a configuration error if the UE does not receive an indication of power sharing.

[0161] In aspect 44, the method according to any one of aspects 35 to 43 includes: wherein the capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS based HO is supported.

[0162] Aspect 45 is a method for wireless communication at an apparatus of a network, comprising: receiving, from a UE, a capability indicating whether to support cancellation of uplink transmission from a source cell in a DAPS-based HO; and scheduling, for the UE, uplink transmission to a target cell during the DAPS-based HO if the capability indicates support for cancellation of uplink transmission from the source cell in the DAPS-based HO.

[0163] In aspect 46, the method according to aspect 45 includes, if the capability indication does not support cancellation of uplink transmission from the source cell in DAPS based HO, avoiding scheduling uplink transmission for the UE if the uplink transmission overlaps with a second uplink transmission scheduled by the target cell for the UE during the DAPS based HO.

[0164] In aspect 47, the method of aspect 46 includes wherein the uplink transmission and the second uplink transmission are in overlapping time resources.

[0165] In aspect 48, the method according to any one of aspects 45 to 47 includes: wherein the capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS based HO is supported.

[0166] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to encompass: a, b, c, ab, ac, bc, and abc.

[0167] The various illustrative logics, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the implementations disclosed herein may be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been generally described and illustrated in the various illustrative components, blocks, modules, circuits, and processes described above with respect to functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0168] The hardware and data processing apparatus for implementing the various illustrative logics, logic blocks, modules, and circuits described in conjunction with the various aspects disclosed herein may be implemented or performed using a general-purpose single-chip or multi-chip processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor or any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration. In some implementations, particular processes and methods may be performed by circuits specific to a given function.

[0169] In one or more aspects, the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware (including the structures disclosed in this specification and their structural equivalents), or any combination thereof. Implementations of the subject matter described in this specification may also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions, encoded on computer storage media for execution by, or to control the operation of, data processing apparatus.

[0170] If implemented in software, the functions may be stored in or transmitted through a computer-readable medium as one or more instructions or codes. The process of the method or algorithm disclosed herein may be implemented in a processing executable software module that may reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, and the communication media include any medium that can realize the transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. In addition, any connection may be appropriately referred to as a computer-readable medium. As used herein, disks and optical disks include compact discs (CDs), laser discs, optical disks, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical disks typically reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as any one or any combination or set of codes and instructions on a machine-readable medium or computer-readable medium, which may be incorporated into a computer program product.

[0171] Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other implementations without departing from the spirit or scope of this disclosure. Accordingly, the claims are not intended to be limited to the implementations shown herein, but are to be accorded the widest scope consistent with this disclosure, the principles, and the novel features disclosed herein.

[0172] Additionally, those skilled in the art will readily appreciate that the terms "upper" and "lower" are sometimes used for ease of describing the drawings and indicate relative positions corresponding to the orientation of the drawings on a correctly oriented page and may not reflect the correct orientation of any device as implemented.

[0173] Certain features described in this specification in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations separately or in any suitable subcombination. Furthermore, while features may be described above as functioning in certain combinations and even initially claimed as such, in some cases one or more features from a claimed combination may be removed from that combination, and a claimed combination may involve subcombinations or variations of subcombinations.

[0174] Similarly, although operations are depicted in a particular order in the figures, this should not be understood as requiring such operations to be performed in the particular order or sequential order shown, or to perform all illustrated operations to achieve the desired result. Further, the accompanying drawings may schematically depict one or more exemplary processes in the form of a flow chart diagram. However, other operations not depicted may be incorporated into the schematically illustrated exemplary processes. For example, one or more additional operations may be performed before, after, simultaneously, or between any of the illustrated operations. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of the various system components in the implementation described above should not be understood as requiring such separation in all implementations, but rather it should be understood that the described program components and systems can generally be integrated together in a single software product, or packaged as multiple software products. In addition, other implementations are within the scope of the appended claims. In some cases, the actions recorded in the claims can be performed in different orders and still achieve the desired result.

Claims

1. A user equipment (UE), comprising: transceiver; a memory configured to store instructions; as well as One or more processors are configured to execute the instructions to cause the UE to perform the following operations: sending, via the transceiver, to a source cell, a signal indicating whether a capability of canceling uplink transmission to the source cell in a handover (HO) based on a dual active protocol stack (DAPS) is supported; receiving, via the transceiver, from the source cell an uplink grant for scheduling a first uplink transmission during the DAPS-based HO; as well as In case the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell, at least a portion of the first uplink transmission is cancelled.

2. The UE according to claim 1, wherein: The first uplink transmission and the second uplink transmission are in overlapping time resources.

3. The UE according to claim 1, wherein: The one or more processors are configured to cause the UE to cancel at least the portion of the first uplink transmission based on a cancellation timeline.

4. The UE according to claim 1, wherein: The one or more processors are further configured to cause the UE to perform the following operations: if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell, and if the capability indication supports cancellation of uplink transmission to the source cell in DAPS-based HO, send the second uplink transmission to the target cell via the transceiver. The UE according to claim 1 , wherein: The one or more processors are configured to cause the UE to cancel at least the portion of the first uplink transmission if the UE does not indicate a second capability for power sharing. The UE according to claim 1 , wherein: The one or more processors are configured to cause the UE to cancel at least the portion of the first uplink transmission if the UE does not receive an indication of power sharing.

7. The UE according to claim 1, wherein: The one or more processors are further configured to cause the UE to, if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell, and if the capability indication does not support cancellation of uplink transmission to the source cell in DAPS-based HO, indicate a configuration error to at least the source cell.

8. The UE according to claim 7, wherein: The one or more processors are configured to cause the UE to indicate the configuration error if the UE does not indicate a second capability for power sharing.

9. The UE according to claim 7, wherein: The one or more processors are configured to cause the UE to indicate the configuration error if the UE does not receive an indication of power sharing.

10. The UE according to claim 1, wherein: The capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

11. A base station, comprising: transceiver; a memory configured to store instructions; as well as One or more processors are configured to execute the instructions to cause the base station to perform the following operations: receiving, via the transceiver, from a user equipment (UE) a signal indicating whether a capability of canceling uplink transmission from a source cell in a handover (HO) based on a dual active protocol stack (DAPS) is supported; as well as In a case where the capability indication supports canceling uplink transmission from the source cell in the DAPS-based HO, scheduling uplink transmission to the target cell during the DAPS-based HO for the UE.

12. The base station according to claim 11, wherein: The one or more processors are further configured to cause the base station to, if the capability indication does not support cancellation of uplink transmission from the source cell in the DAPS-based HO, avoid scheduling the uplink transmission for the UE if the uplink transmission overlaps with a second uplink transmission scheduled by a target cell for the UE during the DAPS-based HO.

13. The base station according to claim 12, wherein: The uplink transmission and the second uplink transmission are in overlapping time resources. The base station according to claim 12 , wherein: The one or more processors are further configured to cause the base station to avoid scheduling the uplink transmission if the UE sends a second capability for power sharing.

15. The base station according to claim 12, wherein: The one or more processors are further configured to cause the base station to avoid scheduling the uplink transmission if the base station sends an indication of power sharing to the UE.

16. The base station according to claim 11, wherein The capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

17. A method for wireless communication at a user equipment (UE), comprising: sending, to a source cell, a signal indicating whether a capability of canceling uplink transmission to the source cell in a handover (HO) based on a dual-active protocol stack (DAPS) is supported; receiving an uplink grant from the source cell for scheduling a first uplink transmission during the DAPS-based HO; as well as In case the first uplink transmission overlaps with a second uplink transmission scheduled by the target cell, at least a portion of the first uplink transmission is cancelled.

18. The method according to claim 17, wherein: The first uplink transmission and the second uplink transmission are in overlapping time resources.

19. The method according to claim 17, wherein Canceling at least the portion of the first uplink transmission is based on a cancellation timeline.

20. The method of claim 17 , wherein, if the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell, and if the capability indication supports canceling uplink transmission to the source cell in DAPS-based HO, the second uplink transmission is sent to the target cell.

21. The method according to claim 17, wherein Canceling at least the portion of the first uplink transmission is performed in case the UE does not indicate a second capability for power sharing.

22. The method according to claim 17, wherein In case the UE does not receive an indication for power sharing, canceling at least the portion of the first uplink transmission is performed.

23. The method of claim 17, further comprising: In a case where the first uplink transmission overlaps with the second uplink transmission scheduled by the target cell, and in a case where the capability indication does not support cancelling uplink transmission to the source cell in DAPS-based HO, indicating a configuration error to at least the source cell.

24. The method according to claim 23, wherein In case the UE does not indicate a second capability for power sharing, indicating the configuration error is performed.

25. The method according to claim 23, wherein In case the UE does not receive an indication for power sharing, indicating the configuration error is performed.

26. The method according to claim 17, wherein The capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

27. A method for wireless communication at a base station, comprising: receiving, from a user equipment (UE), a signal indicating whether a capability of canceling uplink transmission from a source cell in a handover (HO) based on a dual-active protocol stack (DAPS) is supported; as well as In a case where the capability indication supports canceling uplink transmission from the source cell in the DAPS-based HO, scheduling uplink transmission to the target cell during the DAPS-based HO for the UE.

28. The method according to claim 27, further comprising: In a case where the capability indication does not support cancellation of uplink transmission from the source cell in the DAPS-based HO, avoiding scheduling the uplink transmission for the UE if the uplink transmission overlaps with a second uplink transmission scheduled by a target cell for the UE during the DAPS-based HO.

29. The method according to claim 28, wherein The uplink transmission and the second uplink transmission are in overlapping time resources.

30. The method of claim 27, wherein: The capability indicates whether, for each frequency band combination, cancellation of uplink transmission to the source cell in DAPS-based HO is supported.

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