Dynamic measurements of UE intermodulation distortion

Abstract

A network node provides additional information to a UE to enable the UE to measure self-interference. The self-interference is due to intermodulation distortion (IMD) and arises due to transmission of two uplink carriers. Optionally, the network identifies band combinations affected by IMD 850. The network node transmits 860 to the UE configuration information including i) a first configuration for uplink transmission with a first uplink carrier using and a first uplink transmission pattern; ii) a second configuration for uplink transmission with a second uplink carrier and a second uplink transmission pattern; and iii) a transmission occasion for performing self-interference measurement. The UE reconfigures its radio apparatus 870 based on the received configuration information and then transmits one or more second active symbols in the second uplink carrier time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift. The UE is the able to measure self-interference in a downlink carrier caused by transmission in the first and second uplink carriers.

Description

TECHNICAL FIELD

[0001] The example and non-limiting embodiments relate generally to measurement of selfinterference at a UE and, more particularly, to self-interference occurring at a UE performing transmission with two uplink carriers and reception with one downlink carrier. BACKGROUND

[0002] It is known, for maximum sensitivity degradation, to use a static value. SUMMARY

[0003] The following summary is merely intended to be illustrative. The summary is not intended to limit the scope of the claims.

[0004] In accordance with one aspect, an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determine the first configuration based, at least partially, on the received configuration; determine the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmit with the first uplink carrier based, at least partially, on the first configuration; transmit with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determine a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0005] In accordance with one aspect, a method comprising: receiving, with a user equipment from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink earner based, at least partially, on the received configuration.

[0006] In accordance with one aspect, an apparatus comprising means for: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0007] In accordance with one aspect, a computer-readable medium comprising program instructions stored thereon for performing at least the following: causing receiving, with a user equipment from a network node, of a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; causing transmitting with the first uplink carrier based, at least partially, on the first configuration; causing transmitting with the second uplink earner based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0008] In accordance with one aspect, an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmit, to the user equipment, 3 an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements; transmit, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmit, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0009] In accordance with one aspect, a method comprising: determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0010] In accordance with one aspect, an apparatus comprising means for: determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first 4 uplink transmission pattern of active and empty resource elements; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0011] In accordance with one aspect, a computer-readable medium comprising program instructions stored thereon for performing at least the following: determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; causing transmitting, to the user equipment, of an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements; causing transmitting, to the user equipment, of an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and causing transmitting, to the user equipment, of at least one indication of a transmission occasion for performing self-interference measurement.

[0012] In accordance with one aspect, an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a 5 first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determine the first configuration based, at least partially, on the received configuration; determine the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmit with the first uplink carrier based, at least partially, on the first configuration; transmit with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier are time aligned with one or more first reference signals transmitted in the first uplink carrier; and determine a selfinterference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0013] In accordance with one aspect, a method comprising: receiving, with a user equipment from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier are time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self- interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0014] In accordance with one aspect, an apparatus comprising means for: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier are time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0015] In accordance with one aspect, a computer-readable medium comprising program instructions stored thereon for performing at least the following: causing receiving, from a network node, of a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier; causing 7 transmitting with the first uplink carrier based, at least partially, on the first configuration; causing transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier are time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

[0016] In accordance with one aspect, an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmit, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern; transmit, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration is configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmit, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0017] In accordance with one aspect, a method comprising: determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the 8 second configuration is configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0018] In accordance with one aspect, an apparatus comprising means for: determining, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration is configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

[0019] In accordance with one aspect, a computer-readable medium comprising program instructions stored thereon for performing at least the following: determining, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; causing transmitting, to the user equipment, of an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern; causing transmitting, to the user equipment, of an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern m one or more uplink products, wherein the second configuration is configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and causing transmitting, to the user equipment, of at least one indication of a transmission occasion for performing self-interference measurement.

[0020] According to some aspects, there is provided the subject matter of the independent claims. Some further aspects are defined in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The foregoing aspects and other features are explained in the following description, taken in connection with the accompanying drawings, wherein:

[0022] FIG. 1 is a block diagram of one possible and non-limiting example system in which the example embodiments may be practiced;

[0023] FIG. 2 is a diagram illustrating features as described herein;

[0024] FIG. 3 is a diagram illustrating features as described herein;

[0025] FIG. 4 is a diagram illustrating features as described herein;

[0026] FIG. 5 is a diagram illustrating features as described herein;

[0027] FIG. 6 is a diagram illustrating features as described herein;

[0028] FIG. 7 is a diagram illustrating features as described herein;

[0029] FIG. 8 is a flowchart illustrating steps as described herein;

[0030] FIG. 9 is a diagram illustrating features as described herein;

[0031] FIG. 10 is a diagram illustrating features as described herein;

[0032] FIG. 11 is a flowchart illustrating steps as described herein;

[0033] FIG. 12 is a diagram illustrating features as described herein;

[0034] FIG. 13 is a flowchart illustrating steps as described herein;

[0035] FIG. 14 is a flowchart illustrating steps as described herein;

[0036] FIG. 15 is a flowchart illustrating steps as described herein;

[0037] FIG. 16 is a flowchart illustrating steps as described herein; and

[0038] FIG. 17 is a flowchart illustrating steps as described herein. DETAILED DESCRIPTION OF EMBODIMENTS 5

[0039] The following abbreviations that may be found in the specification and / or the drawing figures are defined as follows: ARFCN BW absolute radio-frequency channel number bandwidth 10 CA carrier aggregation CDM code division multiplexing CP cyclic prefix DC dual connectivity DMRS demodulation reference signal 15 FDD frequency division duplexing FFT fast Fourier transformation FO frequency offset IMD intermodulation distortion MSD maximum sensitivity degradation 20 OCC orthogonal cover code OFDM orthogonal frequency division multiplexing PA power amplifier REFSENS reference sensitivity SB sub-band 25 SCS sub-carrier spacing SI signal interference TA Tcp timing advance time cyclic prefix time division duplexing

[0040] Turning to FIG. 1, this figure shows a block diagram of one possible and non-limiting example in which the examples may be practiced. A user equipment (UE) 110, radio access network (RAN) node 170, and network element(s) 190 are illustrated. In the example of FIG. 1, the user equipment (UE) 110 is in wireless communication with a wireless network 100. A UE is a wireless device that can access the wireless network 100. The UE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected through one or more buses 127. Each of the one or more transceivers 130 includes a receiver, Rx, 132 and a transmitter, Tx, 133. The one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, and the like. A “circuit” may include dedicated hardware or hardware in association with software executable thereon. The one or more transceivers 130 are connected to one or more antennas 128. The one or more memories 125 include computer program code 123. The UE 110 includes a module 140, comprising one of or both parts 140-1 and / or 140-2, which may be implemented in a number of ways. The module 140 may be implemented in hardware as module 140-1, such as being implemented as part of the one or more processors 120. The module 140-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array. In another example, the module 140 may be implemented as module 140-2, which is implemented as computer program code 123 and is executed by the one or more processors 120. For instance, the one or more memories 125 and the computer program code 123 may be configured to, with the one or more processors 120, cause the user equipment 110 to perform one or more of the operations as described herein. The UE 110 communicates with RAN node 170 via a wireless link 111.

[0041] The RAN node 170 in this example is a base station that provides access by wireless devices such as the UE 110 to the wireless network 100. The RAN node 170 may be, for example, a base station for 5G, also called New Radio (NR). In 5G, the RAN node 170 may be a NG-RAN 12 node, which is defined as either a gNB or a ng-eNB. A gNB is a node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to a 5GC (such as, for example, the network element(s) 190). The ng-eNB is a node providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC. The NG-RAN node may include multiple gNBs, which may also include a central unit (CU) (gNB-CU) 196 and distributed unit(s) (DUs) (gNB-DUs), of which DU 195 is shown. Note that the DU may include or be coupled to and control a radio unit (RU). The gNB-CU is a logical node hosting RRC, SDAP and PDCP protocols of the gNB or RRC and PDCP protocols of the en-gNB that controls the operation of one or more gNB-DUs. The gNB-CU terminates the Fl interface connected with the gNB-DU. The Fl interface is illustrated as reference 198, although reference 198 also illustrates a link between remote elements of the RAN node 170 and centralized elements of the RAN node 170, such as between the gNB-CU 196 and the gNB-DU 195. The gNB-DU is a logical node hosting RLC, MAC and PHY layers of the gNB or en-gNB, and its operation is partly controlled by gNB-CU. One gNB-CU supports one or multiple cells. One cell is supported by only one gNB-DU. The gNB-DU terminates the Fl interface 198 connected with the gNB-CU. Note that the DU 195 is considered to include the transceiver 160, e.g., as part of a RU, but some examples of this may have the transceiver 160 as part of a separate RU, e.g., under control of and connected to the DU 195. The RAN node 170 may also be an eNB (evolved NodeB) base station, for LTE (long term evolution), or any other suitable base station, access point, access node, or node.

[0042] The RAN node 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N / W I / F(s)) 161, and one or more transceivers 160 interconnected through one or more buses 157. Each of the one or more transceivers 160 includes a receiver, Rx, 162 and a transmitter, Tx, 163. The one or more transceivers 160 are connected to one or more antennas 158. The one or more memories 155 include computer program code 153. The CU 196 may include the processor(s) 152, memories 155, and network interfaces 161. Note that the DU 195 may also contain its own memory / memories and processor(s), and / or other hardware, but these are not shown.

[0043] The RAN node 170 includes a module 150, comprising one of or both parts 150-1 and / or 150-2, which may be implemented in a number of ways. The module 150 may be implemented in hardware as module 150-1, such as being implemented as part of the one or more processors 152. The module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array. In another example, the module 150 may be implemented as module 150-2, which is implemented as computer program code 153 and is executed by the one or more processors 152. For instance, the one or more memories 155 and the computer program code 153 are configured to, with the one or more processors 152, cause the RAN node 170 to perform one or more of the operations as described herein. Note that the functionality of the module 150 may be distributed, such as being distributed between the DU 195 and the CU 196, or be implemented solely in the DU 195.

[0044] The one or more network interfaces 161 communicate over a network such as via the links 176 and 131. Two or more gNBs 170 may communicate using, e.g., link 176. The link 176 may be wired or wireless or both and may implement, for example, an Xn interface for 5G, an X2 interface for LTE, or other suitable interface for other standards.

[0045] The one or more buses 157 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like. For example, the one or more transceivers 160 may be implemented as a remote radio head (RRH) 195 for LTE or a distributed unit (DU) 195 for gNB implementation for 5G, with the other elements of the RAN node 170 possibly being physically in a different location from the RRH / DU, and the one or more buses 157 could be implemented in part as, for example, fiber optic cable or other suitable network connection to connect the other elements (e.g., a central unit (CU), gNB-CU) of the RAN node 170 to the RRH / DU 195. Reference 198 also indicates those suitable network link(s).

[0046] It is noted that description herein indicates that “cells” perform functions, but it should be clear that equipment which forms the cell will perform the functions. The cell makes up part of a base station. That is, there can be multiple cells per base station. For example, there could be three cells for a single carrier frequency and associated bandwidth, each cell covering one-third of a 360 degree area so that the single base station’s coverage area covers an approximate oval or circle. Furthermore, each cell can correspond to a single carrier and a base station may use multiple carriers. So if there are three 120 degree cells per carrier and two carriers, then the base station has a total of 6 cells.

[0047] The wireless network 100 may include a network element or elements 190 that may include core network functionality, and which provides connectivity via a link or links 181 with a further network, such as a telephone network and / or a data communications network (e.g., the Internet). Such core network functionality for 5G may include access and mobility management function(s) (AMF(s)) and / or user plane functions (UPF(s)) and / or session management function(s) (SMF(s)). Such core network functionality for LTE may include MME (Mobility Management Entity) / SGW (Serving Gateway) functionality. These are merely illustrative functions that may be supported by the network element(s) 190, and note that both 5G and LTE functions might be supported. The RAN node 170 is coupled via a link 131 to a network element 190. The link 131 may be implemented as, e.g., an NG interface for 5G, or an SI interface for LTE, or other suitable interface for other standards. The network element 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N / W I / F(s)) 180, interconnected through one or more buses 185. The one or more memories 171 include computer program code 173. The one or more memories 171 and the computer program code 173 are configured to, with the one or more processors 175, cause the network element 190 to perform one or more operations.

[0048] The wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. For example, a network may be deployed in a tele cloud, with virtualized network functions (VNF) running on, for example, data center servers. For example, network core functions and / or radio access network(s) (e.g. CloudRAN, O-RAN, edge cloud) may be virtualized. Note that the virtualized 15 entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152 or 175 and memories 155 and 171, and also such virtualized entities create technical effects.

[0049] It may also be noted that operations of example embodiments of the present disclosure may be carried out by a plurality of cooperating devices (e.g. cRAN).

[0050] The computer readable memories 125, 155, and 171 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The computer readable memories 125, 155, and 171 may be means for performing storage functions. The processors 120, 152, and 175 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multicore processor architecture, as non-limiting examples. The processors 120, 152, and 175 may be means for performing functions, such as controlling the UE 110, RAN node 170, and other functions as described herein.

[0051] In general, the various example embodiments of the user equipment 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.

[0052] Having thus introduced one suitable but non-limiting technical context for the practice of the example embodiments of the present disclosure, example embodiments will now be described with greater specificity.

[0053] Features as described herein may generally relate to self-interference (SI) experienced by UE, for example while operating in carrier aggregation (CA) and / or dual connectivity (DC). In 5G a study was conducted to address the concern of operators that UE selfinterference performance in multi-carrier configurations deviated significantly from the specifications. It was found that the metric used for allowing the UE a relaxation towards reference sensitivity, in the form of maximum sensitivity degradation (MSD), was outdated and of little use. The study concluded that a static MSD value signaled as a UE capability of affected CA / DC combinations would allow UE vendors to inform the NW of an improved MSD performance relative to the specifications, including RX victim, TX aggressor(s), MSD type, power class, and MSD class, as shown in the message format from RAN2 CR (R2-2310735 - Introduction of lower MSD capability) illustrated in FIG. 2.

[0054] The study has allowed a simple and static approach to meet the demand from the operators to some level, but the static value may be very conservative, since there is not accurate measurement, but rather a predetermined value for MSD.

[0055] When a UE is operated with more than one transceiver active at different spectrum allocations, which may typically happen in carrier aggregation or dual connectivity, the UE radio hardware may potentially be subject to, or cause, self-interference. Self-interference may occur for a UE transmitter that has spectrum content, harmonic response, or harmonic products that create interference inside an active receive band of the same UE. The coupling of the transmitted signal to the receiver happens through a printed circuit board (PCB) and through antennas, which may make the impact depend on the design. An example is shown in FIG. 3, where coupling may occur between a front end module (310) transmitting at 1.7-2.1GHz and a front end module (320) transmitting at 600MHz-lGHz, which may both be connected to a same transceiver / PCB (330). What determines the occurrence of self-interference is the exact frequency location of the simultaneous transmission and reception activities at the UE. There are different mechanisms that cause this self-interference, and there are different occurrences of these conditions in the cellular system of 3 GPP.

[0056] Features as described herein may generally relate to different types of selfinterference. There are different types of sources in the UE that lead to self-interference, but they may be regarded as belonging to two different groups: those where only one UL component carrier is used in a band combination; and those that have two simultaneous active uplink component carriers, as illustrated in FIG. 4. UL2 / DL1 means the second harmonic of the uplink can match the fundamental (1) of the downlink. The relations are shown for different types of selfinterference generated with combinations for one uplink carrier at 410, and for different types of self-interference generated with combinations for two uplink carriers at 420.

[0057] Features as described herein may generally relate to intermodulation distortion (IMD). IMD occurs when two UL component carriers intermodulate (e.g. mix), and the products of the mixing of the UL component carriers fall inside the receiver band of one or the other DL component carrier bandwidth at the fundamental carrier frequency of the downlink band. Referring now to FIG. 5, illustrated is an example of the output response of a non-linear element, for example a power amplifier (PA). The response may contain harmonics of both input tones (fundamentals) (510, 520) and the intermodulation products, which are the sums and differences between the two tones. It is seen that the IM2 F2-F1 (530) may be at the upper side of Fl (510), in terms of frequency. This may be directly placed inside the DL part of Fl (510), and so illustrates the IMD2 issue of CA nl A-n77A considering the frequency access. The strength of this product depends on the output power of the PA and the filtering and isolation of this product towards the DL frequency band.

[0058] The power of the intermodulation product may depend on the combination of the product and the attenuation / isolation towards the PA, or other non-linear element with low intercept point, that forms the product. The relation is shown for IMD2 and IMD3 in FIG. 6, power sweep of fundamental tones + IMD powers. Attenuation of the fundamental tones Fl and F2 is illustrated at 610. IMD3, resulting from the mixing of two times the Fl minus F2, is illustrated at 620. IMD3, resulting from the mixing of two times F2 minus Fl, is illustrated at 630.

[0059] FIG. 6 illustrates how a relation between the output power and the IMD product is known. Regardless of the relationship between IMD interference level and PA absolute output power, the relation remains that IMD2 steps 2dB for every IdB more output power on the fundamental, and IMD3 steps 3dB for every IdB more output power, and so forth for IMD4, 5, 6, and 7. This may be used for determining the output power at which the self-interference signal is equal to the noise level assumed in the reference sensitivity (REFSENS) defined for the system.

[0060] A technical effect of example embodiments of the present disclosure may be to enable the UE to determine the level of the self-interference of the IMD products that fall inside its own receive band without requiring any assistance from the network for measurement gaps. The intermodulation products that are typically allowed the highest relaxation (MSD) are IMD2 and IMD3. Self-interference typically comes from using 2 uplink CA, with a 1st carrier allocated in a FDD band and a 2nd carrier allocated in a TDD band, which may typically use sub-carrier spacing (SCS) of 15 KHz and 30 KHz, respectively.

[0061] It may be noted that configuring a pattern of nulls on 2 uplink carriers may not always result in a pattern of nulls in their IMD products because of differences in SCS and / or relative difference in timing advance (TA) of the 2 uplink carriers, meaning that a special signal may be needed to embed a pattern applicable to IMD products in 2 uplink CA (or DC) configurations for determining self-interference at the UE.

[0062] In an example embodiment, a gapless method of self-interference measurement may be used, since the impact on the downlink capacity may be minimal. The implementation of the required pattern that the UE may use for self-interference measurements may be implemented with several signals. The following signals that also serve 1 UE MSD types may be used with new configurations for IMD products:

[0063] - Demodulation reference signal (DMRS) Type 1 or Type 2 symbols with nulls formed by no data in other code division multiplexing (CDM) groups.

[0064] - Sounding reference signal (SRS) for uplink with transmission comb-2 and NULLs in the other comb.

[0065] - Rate matching resources within the rate matching (RM) framework.

[0066] A pattern of NULLs may be generated using a DMRS type 1 pattern and with 2 CDM groups without data. However, configuring the same pattern in the 2nd carrier using 30 KHz SCS was not found to fit the needs for intermodulation.

[0067] In the present disclosure, the term “null” or “NULL” may be used to refer to resource elements (RE) of a transmission that are empty or are not active. For example, nulls may include RE that do not carry data (e.g. without data symbols or symbols carrying DMRS). Example embodiments of the present disclosure may refer to uplink transmission patterns that comprise one or more active symbols comprising patterns of empty and active REs. Alternatively, uplink transmission patterns may comprise only active symbols comprising active REs (e.g. carrying data symbols or symbols carrying DMRS).

[0068] In the present disclosure, the term “format” or “pattern” may be used to refer to the sequence and / or arrangement of REs (e.g. active or empty) transmitted by the UL in each of the two UL carriers. In an example embodiment, the NW may schedule the format or pattern to assist / provide the UE with an UL transmission occurrence / occasion that may allow the UE to perform the self-interference measurement.

[0069] In an example embodiment, NULLS may be produced in an IMD product in the case of two UL carriers in response to configuration of at least one of the two UL carriers (e.g. the carrier with higher SCS) to include repetition of OFDM symbols which overlap in time with the NULL pattern OFDM symbols of the other UL carrier (e.g. the carrier with lower SCS). In an example embodiment, such patterns for UL carriers may be used for a two UL CA (or DC) configuration that is known to have MSD issues.

[0070] OFDM symbols may be a combination of resource elements with active resource elements (data or DMRS) and empty resource elements.

[0071] In an example embodiment, the SCS of the two UL carriers may be different. In an example embodiment, the SCS of the 2nd UL carrier may be higher than the SCS of the 1st UL carrier. Additionally or alternatively, there may be a scaling factor between the SCS of the 2nd UL carrier and the SCS of the 1st UL carrier. The scaling factor may be an integer >1 which may determine the number of symbols on the 2nd UL carrier with repetitions.

[0072] In an example embodiment, the numerology of the two UL carriers may be different. In an example embodiment, the numerology of the 2nd UL carrier may be higher than the numerology of the 1st UL carrier in at least one aspect. In an example embodiment, the numerology may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, a resource allocation, etc.

[0073] In an example embodiment, repetition of symbols may be carried on a carrier with higher SCS. Referring now to FIG. 7, illustrated is an example of patterns for configuration in 2 uplink carriers (710, 740) using PUSCH type A. The bottom part (740) shows a NULL pattern (sub-frequencies in white, e.g. 750) that may be used in a 1st carrier with a sub-carrier spacing of 15 KHz and a single front loaded symbol Type 1 DMRS with 1 repetition. It may be noted that, alternatively, DMRS type 2 may be possible. In symbols 2 and 10, the sub-frequencies carrying NULL (750) may alternate with the sub-frequencies carrying DMRS symbols (in gray, 770). In order to generate IMD products with NULLS in the spectrum, the 2nd carrier (710) using higher SCS (e.g. 30 KHz) and, in this example, including 2 repeated data symbol and Type 1 DMRS, may be configured as follows. It may be noted that, alternatively, DMRS type 2 may be possible.

[0074] Repetition of modulated REs on X = ----- OFDM symbols may be included on the SC$UL1 2nd carrier (UL2) with higher SCS (e.g. 30 KHz), and may be time aligned with the NULL pattern symbols of the 1st carrier (ULI). SCSUL2 >SCSUL1 may describe the sub-carrier spacing of the 2 UL carriers.

[0075] A cyclical time shift may be applied to each of the X symbols on the 2nd carrier. The cyclical time shift may be given by: G = to + * * TCP Eq. 1 (0 1 NpFT^

[0076] where t0 G -——------- is a cyclic time shift applied to the first symbol with (NFFT* SCSUL2) repetition; TCP is a cyclic prefix time of the 2nd carrier with higher SCS; NFFT is the FFT size; and x G (0,1,.. X — 1) is the OFDM symbol number with repetition.

[0077] The cyclic time shift may be specified as a phase ramp applied in the frequency domain to each of the X symbols, for example: 2* ppp— 1] * tx e Tsymb Eq. 2

[0078] where Tsymb = —— is the OFDM symbol time of the 2nd carrier.

[0079] Using t0 = — 1 * (X — 1) * TCP may result in X symbols (e.g. DMRS symbols 720), which in combination may be identical to a single symbol generated with SCSUL1 having a NULL on every alternate sub-carrier (e.g. at 760).

[0080] In the example of FIG. 7, SCSUL2 = 30 KHz and SCSUL1 = 15 KHz. The first slot of the 2nd carrier (710) shows an example of t0 = —TCP which generates 2 symbols (symbols 4 and 5 (730)) with 30 KHz SCS which are identical to a single symbol with 15KHz SCS (760). The second slot shows an example with t0 = 0. Data symbols may be transmitted in the 2nd carrier at 730 symbol 4 and 5.

[0081] The product of the 1st carrier (symbol 2) and the 2nd carrier (symbol 4 and symbol 5) may result in data symbol repetition (of the 2nd carrier) aligned in time to the NULL pattern symbols of the 1st carrier.

[0082] Upon determining on the network side that the carrier aggregation combination includes 2 CA or DC in the uplink, the NW may use the format and schedule the UE to transmit in both carriers the PUSCH type A pattern(s) that may result in the generation of a pattern, in the intermodulation product of the two carriers, that becomes the self-interference of the UE in this band combination.

[0083] In an example embodiment, the OFDM symbols of the UL carrier with the higher SCS, which overlap in time with a RS carrying the NULL pattern on the other UL carrier with lower SCS, may typically be data symbols. Hence, a pattern may be applied on these overlapping data symbols which may enable creating a NULL pattern in the intermodulation products of the 2 UL carriers. This may be achieved by repeating the modulated REs across the overlapping data symbols and giving a cyclical phase shift to each of them.

[0084] Referring now to FIG. 8, illustrated is signaling for configuration of the 2nd carrier with higher SCS for symbol repetition for SI measurement of the IMD product(s). At 810, the network may provide additional information to the UE for the UE to measure self-interference. At 820, the network may transmit, to the UE, a system information block (SIB) SIB11, which may include a channel range per band and a potential CA (or DC) combination list. At 830, the network may transmit, to the UE, a UE capability enquiry, which may include a channel range per band and a potential CA (or DC) combination list. At 840, the UE may transmit, to the network, UE capability information, which may include LowerMSD capability information. Optionally, the UE capability information may include a number of symbols for SI-measurement. At 850, the network may identify a band combination as an IMD affected configuration, and may grant the setup / reconfiguration with information of how the UE is to schedule its uplink carriers for selfinterference measurement.

[0085] At 860, the network may transmit, to the UE, an RRC setup / reconfiguration message, which may include an indication of a transmission occasion when the UE should perform selfinterference measurements. For example, the RRC setup / reconfiguration message may include an indication that the 1st UL carrier is to comprise / be configured with a pattern with NULLS, and an indication that the 2nd carrier is to include / be configured with OFDM symbols overlapping with the 1st carrier’s NULL pattern symbols. For example, the network may indicate, to the UE, L, which may be the 1st OFDM symbol number within a slot containing repetition information / data.

[0086] Optionally, the network may indicate, to the UE, X, which may be the number of symbols within a slot containing repetition information / data. If X is not indicated, the UE may be able to determine X based on the subcarrier spacing of the 2nd carrier divided by the subcarrier spacing of the 1st carrier.

[0087] Optionally, the network may indicate, to the UE, to, which may be a cyclical time shift, applied to first OFDM symbol with repetition on the 2nd carrier. If to is not indicated, the UE may be able to determine to using t0 = — 1 * (X — 1) * TCP. The RRC setup / reconfiguration message may further include an indication of periodicity for the UL carriers, and / or a slot offset for the UL carriers. Optionally, the network may indicate, to the UE, a UL harmonic to DL absolute radio-frequency channel number (ARFCN) offset.

[0088] At 870, the UE may reconfigure the radio (e.g. transmitter) according to the NW instructions. At 880, the UE may receive and store configuration information for SI measurement. At 890, the UE may transmit, to the network, an RRC setup complete message.

[0089] During uplink transmission (using an uplink transmission pattern) and downlink reception, the UE may measure a power difference in downlink resource elements affected by active resource elements of the at least one uplink transmission, and downlink resource elements affected by empty resource elements, of the at least one uplink transmission. Based on these measurements, the UE may determine a value indicative of self-interference, and may transmit the value to the network. For example, a value indicative of a measured self-interference during at least one transmission occasion may be reported via at least one of an uplink control information; a MAC control element; or a RRC (re)configuration message.

[0090] Referring now to FIG. 9, illustrated is an example of giving -1*(X-1)*Tcp to a first symbol (and so on), which may have the technical effect of making the X symbols of a UL carrier with higher SCS identical to 1 symbol of a UL carrier with lower SCS.

[0091] At 910, illustrated is a 15 KHz SCS symbol with an ON-OFF pattern in frequency domain that has 2 identical halves in the time domain. At 920, illustrated are two identical 30 KHz SCS symbols; it is seen that this is not the same as at 910, as there is an extra cyclic prefix.

[0092] At 930, illustrated is an operation of giving / applying a -Tcp cyclic time shift to the first 30KHz symbol, and keeping the second symbol unchanged. This operation results in 940, which is identical to the single symbol with 15KHz SCS at 910.

[0093] At 950, illustrated is an operation of giving Tcp cyclic time shift to a second 30KHz symbol, and keeping the first symbol unchanged. This operation results in 960, which is identical to a single symbol with 15KHz SCS (910) which has been cyclically time shifted by Tcp.

[0094] In an alternative example embodiment, symbols carrying reference signals on two carriers with different SCS may be aligned. In an example embodiment, the reference signals (e.g. DMRS) of the two carriers may be aligned in time. This alignment may only be possible when the ratio of the SCS used on the two carriers is, for example, X = 2. This may be because the RS (e.g. DMRS) typically stretches over only two neighboring symbols. Referring now to FIG. 10, illustrated is an example in which PUSCH type B is used to align DMRS of two UL carriers with different SCS. However, other ratios between the SCS used on the two UL carriers may be possible, such as 4, or some other integer multiplication value.

[0095] PUSCH Type B may be used on one or both the UL carriers to time align the DMRS symbols of the two carriers. Length 2 DMRS may be used on the carrier with higher SCS (e.g. 30 KHz). In the example of FIG. 10, PUSCH Type B is used on the 1st carrier (1030) and PUSCH Type A is used on the 2nd carrier (1010). The 1st carrier (1030) has a SCS of 15KHz, with single Type 1 DMRS with 1 repetition, while the 2nd carrier (1010) has a SCS of 30KHz, with two Typel DMRS symbols.

[0096] Orthogonal cover codes (OCC) ( [ +1 +1 +1 +1 ] or [ +1 -1 +1 -1 ]) may be used for the length 2 DMRS on the carrier with higher SCS (e.g. 30 KHz), here the 2nd carrier (1010).

[0097] In the carrier with higher SCS, here the 2nd carrier (1010), the 1st DMRS symbol may be multiplied by a phase vector corresponding to a cyclic time shift of t0 = — 1 * TCP. This may create two OFDM symbols (1020) which may be identical to a single OFDM symbol (1040) of the 1st carrier (1030) with lower SCS (e.g. 15 KHz SCS) having a NULL on every other sub-carrier (1050), and DMRS on every other sub-carrier (1060).

[0098] Alternatively to DMRS Type 1, DMRS type 2 may be carried on at least one of the two UL carriers.

[0099] Upon determining on the network side that the earner aggregation combination includes 2 CA or DC in the uplink, the NW may use the format and schedule the UE to transmit in both carriers the PUSCH type B patterns, which may result in the generation of a pattern in the intermodulation product of the two carriers that becomes the self-interference of the UE in this band combination.

[00100] In an example embodiment, the DMRS, or any other RS, of the 2 UL carriers may be aligned in time so that the NULL pattern and / or repetitions with cyclic time offset may be applied to them. For this purpose, PUSCH type B may need to be used on one or both of the carriers. This is because PUSCH type A always starts at a first symbol of a slot, with the DMRS in either the 3rd or 4th symbol. By using PUSCH type B on the other carrier, the DMRS of the two carriers may be aligned in time as shown in FIG. 10.

[00101] Referring now to FIG. 11, illustrated is an example of signaling to configure two UL carries (with different SCS) with aligned DMRS using PUSCH type B on at least one of the carriers. At 1105, the network may provide additional information to the UE for the UE to measure self interference. At 1110, the network may transmit, to the UE, SIB 11, which may include a channel range per band and a potential CA (or DC) combination list. At 1115, the network may transmit, to the UE, a UE capability enquiry, which may include a channel range per band and a potential CA (or DC) combination list. At 1120, the UE may transmit, to the network, a UE capability information message, which may include LowerMSD capability information. Optionally, the UE capability information message may include a number of symbols for SI-measurement.

[00102] At 1125, the NW may identify a band combination as an IMD affected configuration and may grant the setup / reconfiguration with information of how the UE is to schedule its uplink carriers for self-interference measurement. At 1130, the network may transmit, to the UE, an RRC setup / reconfiguration message, which may include physical uplink shared channel demodulation reference signal configuration information. For example, the RRC setup / reconfiguration message may include an indication that the 2nd UL carrier should be configured with PUS CH type A, DMRS pos2 (3rd symbol in slot), and DMRS length of 2 symbols. The DMRS may be type 1. The RRC setup / reconfiguration message may also include an indication that the 1st carrier should be configured with PUSCH type B, start at symbol 1 (2nd symbol in slot), and DMRS length of 1 symbol. The DMRS may be type 1. For the 1st carrier, DMRS type 1 with length of 1 symbol will start in symbol 1, as PUSCH type B always has the 1st symbol as DMRS.

[00103] Additionally or alternatively, the RRC setup / reconfiguration message may also include, for the first UL carrier and / or the 2nd UL carrier, an indication of a starting symbol for RS transmission, an indication of a resource allocation for the RS transmission, and / or an indication of at least one RS port allocated in a single CDM group (or, in the case of the 2nd UL carrier, a plurality of RS ports allocated in a plurality of CDM groups).

[00104] Optionally, the RRC setup / reconfiguration message may also include to. If to is not provided, the UE may use a default value, t0 = —1 * TCP.

[00105] The RRC setup / reconfiguration message may also include an indication of periodicity and / or slot offset. Optionally, RRC setup / reconfiguration message may also include an indication of a UL harmonic to DL ARFCN offset.

[00106] At 1135, the UE may reconfigure the radio according to NW instructions. At 1140, the UE may receive and store configuration information for SI measurement. At 1145, the UE may transmit, to the network, a RRC setup complete message. At 1150, the network may transmit, to the UE, a measurement slot configuration, which may include a 1st carrier DCI0-1, which may indicate use of DMRS port 1000, and a number of CDM group without data = 2. The measurement slot configuration may also include a 2nd carrier DCI01, which may indicate use of DMRS ports 1000, 1004.

[00107] In the example of FIG. 11, at run time, the 1st carrier may be configured using DCI with DMRS in pos 1 (i.e. symbol 5), and a number of CDM groups without data = 2. At run time, the 2nd carrier may be configured using DCI with DMRS ports in both CDM groups, for example 1000, 1004, which use OCC

[1111] .

[00108] During uplink transmission (using an uplink transmission pattern) and downlink reception, the UE may measure a power difference in downlink resource elements affected by active resource elements of the at least one uplink transmission, and downlink resource elements affected by empty resource elements, of the at least one uplink transmission. Based on these measurements, the UE may determine a value indicative of self-interference, and may transmit the value to the network. For example, a value indicative of a measured self-interference during at least one transmission occasion may be reported via at least one of an uplink control information; a MAC control element; or a RRC (re)configuration message.

[00109] It may be noted that the example of FIG. 11 is not limiting; different configuration of the 1st UL carrier and the 2nd UL carrier may be possible, and / or different measurement slot configurations may be possible.

[00110] In an example embodiment, the UE may measure self-interference using the uplink configurations described above, where the self-interference is due to intermodulation products created by 2 UL carriers. The UE may need to have an implementation of an operation it uses during reception that is happening simultaneously to the transmission of the new uplink patterns. The UE may determine the configured band combination as a configuration impacted by selfinterference of the IMD type. The UE may determine the order of the IMD product. The UE may measure self-interference as scheduled by the network.

[00111] In an example embodiment, the UE may transmit the required patterns in the time aligned symbols of the 2 carriers. The UE may compensate for frequency offset of the IMD products with respect to the resource block (RB) grid centered around the DL ARFCN. The UE may determine the first sample for FFT operation such that it is no earlier than the beginning of transmission of the CP part of the required symbol on the carrier with a minimum TA (e.g. a lower TA), and no later than the end of the CP part of the other carrier with a maximum TA (e.g. a higher TA). The UE may determine that the FFT length is equal to the OFDM symbol time of the carrier with the lowest / lower SCS. The UE may measure the difference in power of the DL REs affected by the IMD products and the DL REs affected by the NULLs in the IMD products.

[00112] In an example embodiment, FFT bins may be aligned in time and frequency with respect to the sub-carriers of the IMD products. For aligning the FFT in frequency, compensation may be done for the frequency offset within the IMD products towards the RB grid centered on DL ARFCN (FO) given by: FO = mod^Nl * PRB0UL1 + N2 * PRB0UL2) — DLarfcn^,SCSijl1>) Eq. 3

[00113] where: Nl, N2 : Integers determining the IMD product order. PRB0UIA : Frequency of start PRB in the allocation on 1st UL carrier with lower SCS (e.g. 15 KHz). PRBQUL2 : Frequency of first resource element in the allocation on 2nd UL carrier with same or higher SCS (e.g. 30 KHz) than the 1st UL carrier. DLARFCN : Center frequency of the downlink carrier. SCSyL1 : Sub-carrier spacing of the UL carrier 1 with the lower SCS (e.g. 15 KHz).

[00114] For time aligning the FFT operation to the IMD products, the FFT may align m time with the OFDM symbols on both of the UL carriers carrying the required pattern. FIG. 12 shows an example of the possible window for start position of FFT operation (1230). As may be seen, the window for FFT start sample position (1230) may start at the beginning of transmission on 2nd carrier which has the smallest TA (1210); and may end at the end of the cyclic prefix (CP) of the 1st carrier with the largest TA (1220). FFT length (1240) may be equal to the length of the 1st carrier’s OFDM symbol, which may be the carrier with the lowest SCS.

[00115] In an example embodiment, a UE may report an MSD value or a signal-to-self-interference ratio including absolute transmitted output power level of both carriers in a measurement interval. By creating a time offset and a frequency offset between the carriers of the primary cell and secondary cell, the UE may use the offsets in keeping the reporting at the same level and not reporting a change in measured power levels.

[00116] FIG. 13 illustrates the potential steps of an example method 1300. The example method 1300 may include: transmitting an indication of a pattern of time aligned symbols in a first uplink carrier and a second uplink carrier, wherein a subcarrier spacing of the second uplink carrier is higher than a subcarrier spacing of the first uplink carrier, 1310; determining a frequency offset for one or more intermodulation distortion products of the first uplink carrier and the second uplink carrier, 1320; determining a window for a fast Fourier transform start position based, at least partially, on a starting point of a transmission on the second uplink carrier with a smallest timing advance, and an ending point of a cyclic prefix of a transmission on the first uplink carrier with a largest timing advance, 1330; determining a fast Fourier transform length equal to a length of a data symbol of the first uplink carrier, 1340; sampling a downlink carrier based, at least partially, on the determined window and the determined fast Fourier transform length, wherein the downlink carrier is experiencing interference from the one or more intermodulation distortion products of the first uplink carrier and the second uplink carrier, 1350; compensating for the determined frequency offset, 1360; performing a fast Fourier transform operation on samples in the determined window for determined fast Fourier transform length, 1370; and determining a difference in power between downlink elements in the sampled downlink carrier that are affected by the one or more intermodulation distortion products, and downlink elements in the sampled downlink carrier that are affected by nulls, 1360. The example method 1300 may be performed, for example, with a UE.

[00117] A technical effect of example embodiments of the present disclosure may be to enable use of existing reference signals for self-interference measurements. A technical effect of example embodiments of the present disclosure may be to enable determination of an exact output power level associated with self-interference measurements. A technical effect of example embodiments of the present disclosure may be to configure a pattern suitable for measurement of selfinterference caused by IMD products of 2 uplink carriers falling inside an active downlink frequency band. A technical effect of example embodiments of the present disclosure, for example the example embodiments pertaining to UL transmission patterns, may be to allows certain NW flexibility in the DMRS format scheduling. A technical effect of example embodiments of the present disclosure may be to minimize impact on data throughput of the cell, as no measurement gaps may be required except the nulls. A technical effect of example embodiments of the present disclosure may be to enable the UE to determine self-interference in different combinations of SCS between FDD and TOD uplink CA or DC configurations. A technical effect of example embodiments of the present disclosure may be to improve network scheduling on uplink CA or DC combinations with MSD. A technical effect of example embodiments of the present disclosure may be to allow the network to determine exact UE performance in two-uplink CA or DC cases, rather than generalizing all UEs towards the values found in the specification. A technical effect of example embodiments of the present disclosure may be to support accurate results of the signal-to-self-interference ratio. A technical effect of example embodiments of the present disclosure may be to minimize implementation differences in the UE. A technical effect of example embodiments of the present disclosure may be to improve accuracy of the SI determination from improved alignment.

[00118] Example embodiments of the present disclosure may be applicable in the context of 6G. However, this is not limiting; example embodiments of the present disclosure may be applicable in the context of other standards as well.

[00119] FIG. 14 illustrates the potential steps of an example method 1400. The example method 1400 may include: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement, 1410; determining the first configuration based, at least partially, on the received configuration, 1420; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier, 1430; transmitting with the first uplink carrier based, at least partially, on the first configuration, 1440; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, 1450; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration, 1460. The example method 1400 may be performed, for example, with a UE.

[00120] FIG. 15 illustrates the potential steps of an example method 1500. The example method 1500 may include: determining, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier, 1510; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements, 1520; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more first active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols, 1530; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement, 1540. The example method 1500 may be performed, for example, with a network, a network node, a base station, an eNB, a gNB, etc.

[00121] FIG. 16 illustrates the potential steps of an example method 1600. The example method 1600 may include: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement, 1610; determining the first configuration based, at least partially, on the received configuration, 1620; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier, 1630; transmitting with the first uplink carrier based, at least partially, on the first configuration, 1640; transmitting with the second 32 uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration comprise uplink transmission pattern configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink earner are time aligned with one or more first reference signals transmitted in the first uplink carrier, 1650; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration, 1660. The example method 1600 may be performed, for example, with a UE.

[00122] FIG. 17 illustrates the potential steps of an example method 1700. The example method 1700 may include: determining, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier, 1710; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern, 1720; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern, wherein the first configuration and the second configuration comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration is configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier, 1730; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement, 1740. The example method 1700 may be performed, for example, with a network, a network node, a base station, an eNB, a gNB, etc.

[00123] In accordance with one example embodiment, an apparatus may comprise: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determine the first configuration based, at least partially, on the received configuration; determine the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmit with the first uplink carrier based, at least partially, on the first configuration; transmit with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier may be time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determine a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. A numerology associated with the second uplink carrier may be higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A number of symbols of the second uplink carrier used to transmit the one or more second active symbols may be equal to a subcarrier spacing of the second uplink carrier divided by a subcarrier spacing of the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier. The second uplink transmission pattern may comprise a pattern of active resource elements in the second carrier, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols. The indication of the second configuration may further comprise an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols. The indication of the second configuration may further comprise an indication of the cyclical time shift for the first symbol in the second carrier. The cyclical time shift applied to the one or more second active symbols transmitted in the second uplink carrier may be based, at least partially, on: a number of symbols of the second uplink carrier used to carry the one or more second active symbols, and a cyclical prefix time of the second uplink carrier. The example apparatus may be further configured to: transmit, to the network node, an indication of the determined self-interference. Determining the 34 self-interference caused in the downlink carrier may comprise the example apparatus being further configured to: compensate for at least one frequency offset of at least one intermodulation distortion product detected in the downlink carrier. Determining the self-interference caused in the downlink carrier may comprise the example apparatus being further configured to: determine a first sample for a fast Fourier transform operation based, at least partially, on a starting position of a cyclic prefix on a carrier with a lowest timing advance, and an ending position of a cyclic prefix on a carrier with a largest timing advance.

[00124] In accordance with one aspect, an example method may be provided comprising: receiving, with a user equipment from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier may be time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a selfinterference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. A numerology associated with the second uplink carrier may be higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A number of symbols of the second uplink carrier used to transmit the one or more second active symbols may be equal to a subcarrier spacing of the second uplink carrier divided by a subcarrier spacing of the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier. The second uplink transmission pattern may comprise a pattern of active resource elements in the second carrier, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols. The indication of the second configuration may further comprise an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols. The indication of the second configuration may further comprise an indication of the cyclical time shift for the first symbol in the second carrier. The cyclical time shift applied to the one or more second active symbols transmitted in the second uplink carrier may be based, at least partially, on: a number of symbols of the second uplink carrier used to carry the one or more second active symbols, and a cyclical prefix time of the second uplink carrier. The example method may further comprise: transmitting, to the network node, an indication of the determined self-interference. The determining of the self-interference caused in the downlink earner may comprise: compensating for at least one frequency offset of at least one intermodulation distortion product detected in the downlink carrier. The determining of the self-interference caused in the downlink carrier may comprise: determining a first sample for a fast Fourier transform operation based, at least partially, on a starting position of a cyclic prefix on a carrier with a lowest timing advance, and an ending position of a cyclic prefix on a carrier with a largest timing advance.

[00125] As used in this application, the term “circuitry” or “means” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable): (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit(s) and or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.” This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

[00126] In accordance with one example embodiment, an apparatus may comprise means for: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier may be time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a selfinterference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. The example apparatus may comprise means for performing any example method described above.

[00127] A processor, memory, and / or example algorithms (which may be encoded as instructions, program, or code) may be provided as example means for providing or causing performance of operation.

[00128] In accordance with one example embodiment, a (non-transitory) computer-readable medium comprising program instructions stored thereon for performing at least the following: causing receiving, with a user equipment from a network node, of a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; causing transmitting with the first uplink carrier based, at least partially, on the first configuration; causing transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier may be time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. The example computer-readable medium may comprise program instructions stored thereon for performing any example method described above.

[00129] In accordance with one example embodiment, an apparatus may comprise: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; transmit, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern of active and empty resource elements; transmit, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmit, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement. A numerology associated with the second uplink carrier may be higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. The indication of the second configuration may further comprise an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols. The indication of the second configuration may further comprise an indication of the cyclical time shift for the first symbol in the second carrier. The example apparatus may be further configured to: receive, from the user equipment, an indication of self-interference caused in the downlink carrier via transmission with the first uplink earner based on the first configuration, and with the second uplink carrier based on the second configuration.

[00130] In accordance with one aspect, an example method may be provided comprising: determining, with a network node for a user equipment, a downlink carrier that may be experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern of active and empty resource elements; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement. A numerology associated with the second uplink carrier may be higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. The indication of the second configuration may further comprise an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols. The indication of the second configuration may further comprise an indication of the cyclical time shift for the first symbol in the second carrier. The example method may further comprise: receiving, from the user equipment, an indication of self-interference caused in the downlink carrier via transmission with the first uplink carrier based on the first configuration, and with the second uplink carrier based on the second configuration.

[00131] In accordance with one example embodiment, an apparatus may comprise means for: determining, with a network node for a user equipment, a downlink carrier that may be experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern of active and empty resource elements; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement. The example apparatus may comprise means for performing any example method described above.

[00132] In accordance with one example embodiment, a (non-transitory) computer-readable medium comprising program instructions stored thereon for performing at least the following: determining, with a network node for a user equipment, a downlink carrier that may be experiencing interference from a first uplink carrier and a second uplink carrier; causing transmitting, to the user equipment, of an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern of active and empty resource elements; causing transmitting, to the user equipment, of an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols may comprise one or more repeated symbols in the second carrier, wherein the indication of the second configuration may comprise, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; and causing transmitting, to the user equipment, of at least one indication of a transmission occasion for performing self-interference measurement. The example computer-readable medium may comprise program instructions stored thereon for performing any example method described above.

[00133] In accordance with one example embodiment, an apparatus may comprise: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determine the first configuration based, at least partially, on the received configuration; determine the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmit with the first uplink carrier based, at least partially, on the first configuration; transmit with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier may be time aligned with one or more first reference signals transmitted in the first uplink carrier; and determine a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. A numerology associated with the second uplink carrier may be different from a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A ratio between a subcarrier spacing of the second uplink carrier and a subcarrier spacing of the first uplink carrier may comprise two or four. The indication of the first configuration may comprise at least one of: a type of physical uplink shared channel for the first uplink carrier, a starting symbol for reference signal transmission, a resource allocation for reference signal transmission, at least one reference signal port allocated in a single code division multiplexing group, a reference signal type for the first uplink carrier, or a reference signal length for the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier, wherein the first uplink transmission pattern may be associated with at least one of: a demodulation reference signal, or a reference signal. The indication of the second configuration may comprise at least: a type of physical uplink shared channel for the second uplink carrier, a plurality of reference signal ports allocated in a plurality of code division multiplexing groups, a reference signal type for the second uplink carrier, a reference signal length for the second uplink carrier, wherein the reference signal length for the second uplink carrier may be greater than one, and a starting symbol for transmission of the one or more second reference signals with the second uplink carrier. The indication of the second configuration may further comprise an indication of a cyclical time shift applied to a first reference signal symbol on the second uplink carrier that is configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier. At least one of the first configuration 42 or the second configuration may comprise a configuration for transmission with physical uplink shared channel type B. The one or more second reference signals transmitted in the second uplink carrier may be time aligned with the one or more first reference signals transmitted in the first uplink carrier based, at least partially, on a cyclical time shift applied to a first reference signal symbol on the second uplink carrier that may be configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier, wherein the cyclical time shift may be based, at least partially, on a cyclic prefix time of the second uplink carrier. Transmitting with the second uplink carrier may comprise the example apparatus being further configured to: apply an orthogonal cover code for transmission of the one or more second reference signals with the second uplink carrier. The example apparatus may be further configured to: transmit, to a network node, an indication of the determined self-interference. Determining the self-interference caused in the downlink carrier may comprise the example apparatus being further configured to: compensate for at least one frequency offset of at least one intermodulation distortion product detected in the downlink carrier. Determining the self-interference caused in the downlink carrier may comprise the example apparatus being further configured to: determine a first sample for a fast Fourier transform operation based, at least partially, on a starting position of a cyclic prefix on a carrier with a lowest timing advance, and an ending position of a cyclic prefix on a carrier with a largest timing advance.

[00134] In accordance with one aspect, an example method may be provided comprising: receiving, with a user equipment from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted m the second uplink carrier may be time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. A numerology associated with the second uplink carrier may be different from a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A ratio between a subcarrier spacing of the second uplink carrier and a subcarrier spacing of the first uplink carrier may comprise two or four. The indication of the first configuration may comprise at least one of: a type of physical uplink shared channel for the first uplink carrier, a starting symbol for reference signal transmission, a resource allocation for reference signal transmission, at least one reference signal port allocated in a single code division multiplexing group, a reference signal type for the first uplink carrier, or a reference signal length for the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier, wherein the first uplink transmission pattern may be associated with at least one of: a demodulation reference signal, or a reference signal. The indication of the second configuration may comprise at least: a type of physical uplink shared channel for the second uplink carrier, a plurality of reference signal ports allocated in a plurality of code division multiplexing groups, a reference signal type for the second uplink carrier, a reference signal length for the second uplink carrier, wherein the reference signal length for the second uplink carrier may be greater than one, and a starting symbol for transmission of the one or more second reference signals with the second uplink carrier. The indication of the second configuration may further comprise an indication of a cyclical time shift applied to a first reference signal symbol on the second uplink carrier that is configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier. At least one of the first configuration 44 or the second configuration may comprise a configuration for transmission with physical uplink shared channel type B. The one or more second reference signals transmitted in the second uplink carrier may be time aligned with the one or more first reference signals transmitted in the first uplink carrier based, at least partially, on a cyclical time shift applied to a first reference signal symbol on the second uplink carrier that may be configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier, wherein the cyclical time shift may be based, at least partially, on a cyclic prefix time of the second uplink carrier. Transmitting with the second uplink carrier may comprise: applying an orthogonal cover code for transmission of the one or more second reference signals with the second uplink carrier. The example method may further comprise: transmitting, to a network node, an indication of the determined self-interference. Determining the self-interference caused in the downlink carrier may comprise: compensating for at least one frequency offset of at least one intermodulation distortion product detected in the downlink carrier. Determining the self-interference caused in the downlink carrier may comprise: determining a first sample for a fast Fourier transform operation based, at least partially, on a starting position of a cyclic prefix on a carrier with a lowest timing advance, and an ending position of a cyclic prefix on a carrier with a largest timing advance.

[00135] In accordance with one example embodiment, an apparatus may comprise means for: receiving, from a network node, a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; transmitting with the first uplink carrier based, at least partially, on the first configuration; transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier may be time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. The example apparatus may comprise means for performing any example method described above.

[00136] In accordance with one example embodiment, a (non-transitory) computer-readable medium comprising program instructions stored thereon for performing at least the following: causing receiving, from a network node, of a configuration comprising at least: an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern, an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, and at least one indication of a transmission occasion for performing self-interference measurement; determining the first configuration based, at least partially, on the received configuration; determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier may be configured to be performed while reception is performed with a downlink carrier; causing transmitting with the first uplink carrier based, at least partially, on the first configuration; causing transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein one or more second reference signals transmitted in the second uplink carrier may be time aligned with one or more first reference signals transmitted in the first uplink carrier; and determining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration. The example computer-readable medium may comprise program instructions stored thereon for performing any example method described above.

[00137] In accordance with one example embodiment, an apparatus may comprise: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, for a user equipment, a downlink carrier that 46 is experiencing interference from a first uplink carrier and a second uplink carrier; transmit, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern; transmit, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration may be configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmit, to the user equipment, at least one indication of a transmission occasion for performing selfinterference measurement. A numerology associated with the second uplink carrier may be different from a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A ratio between a subcarrier spacing of the second uplink carrier and a subcarrier spacing of the first uplink carrier may comprise two or four. The indication of the first configuration may comprise at least one of: a type of physical uplink shared channel for the first uplink carrier, a starting symbol for reference signal transmission, a resource allocation for reference signal transmission, at least one reference signal port allocated in a single code division multiplexing group, a reference signal type for the first uplink carrier, or a reference signal length for the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier, wherein the first uplink transmission pattern may be associated with at least one of: a demodulation reference signal, or a reference signal. The indication of the second configuration may comprise at least: a type of physical uplink shared channel for the second uplink carrier, a plurality of reference signal ports allocated in a plurality of code division multiplexing groups, a reference signal type for the second uplink carrier, a reference signal length for the second uplink carrier, wherein the reference signal length for the second uplink carrier may be greater than one, and a starting symbol for transmission of the one or more second reference signals with the second uplink carrier. The indication of the second configuration may further comprise an indication of a cyclical time shift applied to a first 47 reference signal symbol on the second uplink carrier that may be configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier. At least one of the first configuration or the second configuration may comprise a configuration for transmission with physical uplink shared channel type B. The example apparatus may be further configured to: receive, from the user equipment, an indication of self-interference caused in the downlink carrier via transmission with the first uplink carrier based on the first configuration, and with the second uplink carrier based on the second configuration.

[00138] In accordance with one aspect, an example method may be provided comprising: determining, with a network node for a user equipment, a downlink carrier that may be experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration may be configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement. A numerology associated with the second uplink carrier may be different from a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier may comprise at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation. A ratio between a subcarrier spacing of the second uplink carrier and a subcarrier spacing of the first uplink carrier may comprise two or four. The indication of the first configuration may comprise at least one of: a type of physical uplink shared channel for the first uplink carrier, a starting symbol for reference signal transmission, a resource allocation for reference signal transmission, at least one reference signal port allocated in a single code division multiplexing group, a reference signal type for the first uplink carrier, or a reference signal length for the first uplink carrier. The first uplink transmission pattern may comprise a pattern of active and empty resource elements in the first carrier, wherein the first uplink transmission pattern may be associated with at least one of: a demodulation reference signal, or a reference signal. The indication of the second configuration may comprise at least: a type of physical uplink shared channel for the second uplink carrier, a plurality of reference signal ports allocated in a plurality of code division multiplexing groups, a reference signal type for the second uplink carrier, a reference signal length for the second uplink carrier, wherein the reference signal length for the second uplink carrier may be greater than one, and a starting symbol for transmission of the one or more second reference signals with the second uplink carrier. The indication of the second configuration may further comprise an indication of a cyclical time shift applied to a first reference signal symbol on the second uplink carrier that may be configured to cause the one or more second reference signals transmitted in the second uplink carrier to be time aligned with the one or more first reference signals transmitted in the first uplink carrier. At least one of the first configuration or the second configuration may comprise a configuration for transmission with physical uplink shared channel type B. The example method may further comprise: receiving, from the user equipment, an indication of self-interference caused in the downlink carrier via transmission with the first uplink carrier based on the first configuration, and with the second uplink carrier based on the second configuration.

[00139] In accordance with one example embodiment, an apparatus may comprise means for: determining, for a user equipment, a downlink carrier that may be experiencing interference from a first uplink carrier and a second uplink carrier; transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern; transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration may be configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and transmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement. The example apparatus may comprise means for performing any example method described above.

[00140] In accordance with one example embodiment, a (non-transitory) computer-readable medium comprising program instructions stored thereon for performing at least the following: determining, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier; causing transmitting, to the user equipment, of an indication of a first configuration for the first uplink carrier, wherein the first configuration may comprise a first uplink transmission pattern; causing transmitting, to the user equipment, of an indication of a second configuration for the second uplink carrier, wherein the second configuration may comprise a second uplink transmission pattern, wherein the first configuration and the second configuration may comprise uplink transmission patterns configured to cause a pattern in one or more uplink products, wherein the second configuration may be configured to cause one or more second reference signals transmitted in the second uplink carrier to be time aligned with one or more first reference signals transmitted in the first uplink carrier; and causing transmitting, to the user equipment, of at least one indication of a transmission occasion for performing self-interference measurement. The example computer-readable medium may comprise program instructions stored thereon for performing any example method described above.

[00141] The term “non-transitory,” as used herein, is a limitation of the medium itself (i.e. tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).

[00142] It should be understood that the foregoing description is only illustrative. Various alternatives and modifications can be devised by those skilled in the art. For example, features recited in the various dependent claims could be combined with each other in any suitable combination(s). In addition, features from different embodiments described above could be selectively combined into a new embodiment. Accordingly, the description is intended to embrace all such alternatives, modification and variances which fall within the scope of the appended claims.

Claims

What is claimed is:

1. An apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:receive, from a network node, a configuration comprising at least:an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern,an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, andat least one indication of a transmission occasion for performing selfinterference measurement;determine the first configuration based, at least partially, on the received configuration;determine the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier;transmit with the first uplink carrier based, at least partially, on the first configuration;transmit with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in thesecond uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; anddetermine a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

2. The apparatus of claim 1, wherein a numerology associated with the second uplink carrier is higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier comprises at least one of: a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation.

3. The apparatus of claim 1 or 2, wherein a number of symbols of the second uplink carrier used to transmit the one or more second active symbols is equal to a subcarrier spacing of the second uplink carrier divided by a subcarrier spacing of the first uplink carrier.

4. The apparatus of any of claims 1 through 3, wherein the first uplink transmission pattern comprises a pattern of active and empty resource elements in the first carrier.

5. The apparatus of any of claims 1 through 4, wherein the second uplink transmission pattern comprises a pattern of active resource elements in the second carrier, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols.

6. The apparatus of claim 5, wherein the indication of the second configuration further comprises an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols.

7. The apparatus of claim 5 or 6, wherein the indication of the second configuration further comprises an indication of the cyclical time shift for the first symbol in the second carrier.

528. The apparatus of any of claims 1 through 6, wherein the cyclical time shift applied to the one or more second active symbols transmitted in the second uplink carrier is based, at least partially, on: a number of symbols of the second uplink carrier used to carry the one or more second active symbols, and a cyclical prefix time of the second uplink carrier.

9. The apparatus of any of claims 1 through 8, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to:transmit, to the network node, an indication of the determined self-interference.

10. The apparatus of any of claims 1 through 9, wherein determining the self-interference caused in the downlink carrier comprises the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to:compensate for at least one frequency offset of at least one intermodulation distortion product detected in the downlink carrier.

11. The apparatus of any of claims 1 through 10, wherein determining the self-interference caused in the downlink carrier comprises the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to:determine a first sample for a fast Fourier transform operation based, at least partially, on a starting position of a cyclic prefix on a carrier with a lowest timing advance, and an ending position of a cyclic prefix on a carrier with a largest timing advance.

12. A method comprising:receiving, with a user equipment from a network node, a configuration comprising at least:an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern,an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, andat least one indication of a transmission occasion for performing self-interference measurement;determining the first configuration based, at least partially, on the received configuration;determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier;transmitting with the first uplink carrier based, at least partially, on the first configuration;transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; anddetermining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

13. An apparatus comprising means for:receiving, from a network node, a configuration comprising at least:an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern,an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, andat least one indication of a transmission occasion for performing self-interference measurement;determining the first configuration based, at least partially, on the received configuration;determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier;transmitting with the first uplink carrier based, at least partially, on the first configuration;transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; anddetermining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

14. A computer-readable medium comprising program instructions stored thereon for performing at least the following:causing receiving, with a user equipment from a network node, of a configuration comprising at least:an indication of a first configuration for uplink transmission with a first uplink carrier comprising a first uplink transmission pattern,an indication of a second configuration for uplink transmission with a second uplink carrier comprising a second uplink transmission pattern, andat least one indication of a transmission occasion for performing self-interference measurement;determining the first configuration based, at least partially, on the received configuration;determining the second configuration based, at least partially, on the received configuration, wherein transmission with the first uplink carrier and the second uplink carrier is configured to be performed while reception is performed with a downlink carrier;causing transmitting with the first uplink carrier based, at least partially, on the first configuration;causing transmitting with the second uplink carrier based, at least partially, on the second configuration, wherein one or more second active symbols transmitted in the second uplink carrier are time aligned with one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift; anddetermining a self-interference caused in the downlink carrier via transmission with the first uplink carrier and the second uplink carrier based, at least partially, on the received configuration.

15. An apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:determine, for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier;transmit, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements;transmit, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the 56first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, m the second carrier, comprising at least one of the one or more repeated symbols; andtransmit, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

16. The apparatus of claim 15, wherein a numerology associated with the second uplink carrier is higher than a numerology associated with the first uplink carrier, wherein at least one of the numerology associated with the second uplink carrier or the numerology associated with the first uplink carrier comprises at least one of a cyclic prefix length, a number of symbols, a subcarrier spacing, or a resource allocation.

17. The apparatus of claim 15 or 16, wherein the indication of the second configuration further comprises an indication of a number of symbols, in the second carrier, comprising the one or more repeated symbols.

18. The apparatus of any of claims 15 through 17, wherein the indication of the second configuration further comprises an indication of the cyclical time shift for the first symbol in the second carrier.

19. The apparatus of any of claims 15 through 18, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to:receive, from the user equipment, an indication of self-interference caused in the downlink carrier via transmission with the first uplink carrier based on the first configuration, and with the second uplink carrier based on the second configuration.

20. A method comprising:determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier;transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements;transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; andtransmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

21. An apparatus comprising means for:determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier;transmitting, to the user equipment, an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements;transmitting, to the user equipment, an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active58symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; andtransmitting, to the user equipment, at least one indication of a transmission occasion for performing self-interference measurement.

22. A computer-readable medium comprising program instructions stored thereon for performing at least the following:determining, with a network node for a user equipment, a downlink carrier that is experiencing interference from a first uplink carrier and a second uplink carrier;causing transmitting, to the user equipment, of an indication of a first configuration for the first uplink carrier, wherein the first configuration comprises a first uplink transmission pattern of active and empty resource elements;causing transmitting, to the user equipment, of an indication of a second configuration for the second uplink carrier, wherein the second configuration comprises a second uplink transmission pattern of one or more second active symbols in the second carrier that are time aligned with the one or more first active symbols transmitted in the first uplink carrier based, at least partially, on a cyclical time shift, wherein at least one of the one or more second active symbols comprises one or more repeated symbols in the second carrier, wherein the indication of the second configuration comprises, at least, an indication of a first symbol, in the second carrier, comprising at least one of the one or more repeated symbols; andcausing transmitting, to the user equipment, of at least one indication of a transmission occasion for performing self-interference measurement.

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