Timing advance techniques for managing cross-link interference in 5G communication systems

Abstract

Systems, methods, and apparatuses disclosed herein may mitigate interference in a wireless network. The systems, methods, and apparatus may determine a mode of operation of a base station (BS) within the wireless network. The systems, methods, and devices may select a first time advance (TA) when the BS is operating in a static time division duplex (TDD) mode of operation, or a second TA when the BS is operating in a subband full duplex (SBFD) mode of operation or a dynamic TDD mode of operation. The systems, methods, and apparatus may advance a signal on an uplink (UL) by the first TA such that the signal on the UL is time aligned with other signals on the UL from other UEs at the BS to mitigate inter-carrier interference (ICI) at the BS. Otherwise, the systems, methods, and apparatus may advance the signal on the UL by the second TA such that the signal on the UL is time aligned with a signal from the BS on the DL at a victim UE within the wireless network to mitigate cross-link interference (CLI) at the victim UE.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to U.S. Non - Provisional Patent Application No. 18 / 225,995, filed on July 25, 2023, which claims the benefit of U.S. Provisional Patent Application No. 63 / 422,247, filed on November 3, 2022, and each of these two patent applications is hereby incorporated by reference in its entirety. Background of the Invention

[0003] A wireless network (e.g., a wireless network compliant with the 3rd Generation Partnership Project (3GPP) standards) may include many electronic devices, such as a first user equipment (UE) and a first base station (BS). The first BS may transmit to the first UE on the downlink (DL), and the first UE may transmit to the first BS on the uplink (UL). In some cases, the wireless network may include a second UE that is transmitting to the first BS on the UL while the first UE is receiving on the DL, which may cause cross - link interference (CLI) between the first UE and the second UE. In other cases, the wireless network may include a second BS that is transmitting on the DL while the first BS is receiving on the UL, which may cause CLI between the first BS and the second UE. Due to the large transmit power difference between the UL and the DL and / or propagation conditions, CLI may be detrimental to the performance of the wireless network. Summary of the Invention

[0004] Some embodiments of the present disclosure describe a method for mitigating cross - link interference (CLI) in a wireless network. The method includes: identifying an operating mode of a base station (BS) within the wireless network; selecting, from a plurality of timing advances (TAs) stored in a first UE, a TA associated with the operating mode, advancing the timing of the uplink (UL) by the selected TA, and transmitting a signal to the BS on the timed - advanced UL.

[0005] In some embodiments, the operation mode may include a static time division duplex (TDD) operation mode; a sub-band full duplex (SBFD) operation mode; or a dynamic TDD operation mode. In these embodiments, the selection may include selecting a first TA based on the BS operating in the static TDD operation mode, and the advancement may include advancing the timing of the UL by the first TA such that the signals on the time-advanced UL are time-aligned with other signals received at the BS from other UEs. In these embodiments, the selection may include selecting a second TA based on the BS operating in the SBFD operation mode or the dynamic TDD operation mode, and the advancement may include advancing the timing of the UL by the second TA such that the signals on the time-advanced UL are time-aligned with the signals on the downlink (DL) from the BS at a second UE within the wireless network.

[0006] In some embodiments, the advancement may include advancing the timing of the UL frame by the selected time advance.

[0007] In some embodiments, the method may further include receiving a TA from the BS on layer 1 signaling. In these embodiments, the layer 1 signaling may include uplink control information (UCI).

[0008] In some embodiments, the method may further include receiving a TA from the BS on layer 2 signaling. In these embodiments, the layer 2 signaling may include a media access control - control element (MAC-CE) or a random access response (RAR) with TA information.

[0009] Some embodiments of the present disclosure describe a first user equipment (UE) including a processor and a transceiver. The processor identifies an operation mode of a base station (BS) within a wireless network, selects a TA associated with the operation mode from a plurality of time advances (TAs) stored in the first UE, and advances the timing of the uplink (UL) by the selected time advance. The transceiver transmits a signal to the BS on the time-advanced UL.

[0010] In some embodiments, the operation mode may include a static time division duplex (TDD) operation mode; a sub-band full duplex (SBFD) operation mode; or a dynamic TDD operation mode. In these embodiments, when the BS is operating in the static TDD operation mode, the processor may select a first TA and advance the timing of the UL by the first TA such that the signals on the time-advanced UL are time-aligned with other signals received at the BS from other UEs. In these embodiments, when the BS is operating in the SBFD operation mode or the dynamic TDD operation mode, the processor may select a second TA and advance the timing of the UL by the second TA such that the signals on the time-advanced UL are time-aligned with the signals on the downlink (DL) from the BS at a second UE within the wireless network.

[0011] In some embodiments, the processor may advance the timing of the UL frame by a selected timing advance.

[0012] In some embodiments, the processor may receive a TA from the BS on layer 1 signaling. In these embodiments, the layer 1 signaling may include uplink control information (UCI).

[0013] In some embodiments, the processor may receive a TA from the BS on layer 2 signaling. In these embodiments, the layer 2 signaling may include a medium access control - control element (MAC - CE) or a random access response (RAR) with TA information.

[0014] Some embodiments of the present disclosure describe a first user equipment (UE) including a memory and a processor. The memory stores a first timing advance (TA) and a second TA. The processor selects the first TA in response to the BS operating in a sub - band full - duplex (SBFD) operation mode or a dynamic time - division duplex (TDD) operation mode within a wireless network, advances the timing of the uplink (UL) by the first TA so that the signal on the time - advanced UL is time - aligned with the signal on the downlink (DL) from the BS at a second UE within the wireless network, and transmits a signal to the base station on the time - advanced UL.

[0015] In some embodiments, the processor may select the second TA in response to the BS operating in a static TDD operation mode, and advance the timing of the UL by the second TA so that the signal on the time - advanced UL is time - aligned with other signals received from other UEs at the BS.

[0016] The present invention content is provided only for the purpose of exemplifying some embodiments to provide an understanding of the subject matter described herein. Therefore, the above features are only examples and should not be construed as narrowing the scope or essence of the subject matter in the present disclosure. Other features, aspects, and advantages of the present disclosure will become apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated herein and forming a part of the specification illustrate the disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable a person skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1A and Figure 1B Exemplary wireless networks with cross - link interference (CLI) in accordance with various embodiments of the present disclosure are graphically illustrated.

[0019] Figure 2A and Figure 2BExemplary timing advance that can be implemented within an exemplary wireless network in accordance with various embodiments of the present disclosure is graphically illustrated.

[0020] Figure 3A A flowchart of a first exemplary operation for managing CLI interference within an exemplary wireless network in accordance with various embodiments of the present disclosure is illustrated.

[0021] Figure 3B A flowchart of a second exemplary operation for managing CLI interference within an exemplary wireless network in accordance with various embodiments of the present disclosure is illustrated.

[0022] Figure 4 Exemplary resource scheduling that can be implemented within an exemplary wireless network in accordance with various embodiments of the present disclosure is graphically illustrated.

[0023] Figure 5 A block diagram of an electronic device for mitigating CLI within an exemplary wireless network in accordance with various embodiments of the present disclosure is illustrated.

[0024] Figure 6 A block diagram of an exemplary computer system that can be implemented within an exemplary wireless network in accordance with some exemplary embodiments of the present disclosure is illustrated.

[0025] The present disclosure is described with reference to the accompanying drawings. In the drawings, generally, like reference numerals denote like or functionally similar elements. Additionally, generally, the leftmost digit of a reference numeral identifies the drawing in which the reference numeral first appears. Detailed Description

[0026] Overview

[0027] The systems, methods, and apparatuses disclosed herein can mitigate interference in a wireless network. These systems, methods, and apparatuses can determine an operating mode of a base station (BS) within the wireless network. These systems, methods, and apparatuses can select a first timing advance (TA) when the BS is operating in a static time division duplex (TDD) operating mode, or a second TA when the BS is operating in a sub-band full duplex (SBFD) operating mode or a dynamic TDD operating mode. These systems, methods, and apparatuses can advance a signal on an uplink (UL) by the first TA such that the signal on the UL is time-aligned with other signals from other UEs on the UL at the BS to mitigate inter-carrier interference (ICI) at the BS. Otherwise, these systems, methods, and apparatuses can advance the signal on the UL by the second TA such that the signal on the UL is time-aligned with a signal on a downlink (DL) from the BS at a victim UE within the wireless network to mitigate cross-link interference (CLI) at the victim UE.

[0028] Exemplary wireless network with cross-link interference (CLI)

[0029] Figure 1A and Figure 1B graphically illustrates an exemplary wireless network with cross - link interference (CLI) in accordance with various embodiments of the present disclosure. In Figure 1A the exemplary embodiment shown, the first wireless network 100 includes a base station (BS) 102, a victim user equipment (UE) 104, and an attacker UE 106. As Figure 1A shown, the BS 102 may send a signal to the victim UE 104 on the downlink (DL) 150. As used herein, terms such as downlink (DL) refer to a first direction from a BS (such as the BS 102, by way of example) to a UE (such as the victim UE 104, by way of example). The DL 150 may include one or more downlink communication channels, such as a physical downlink control channel (PDCCH) and / or a physical downlink shared channel (PDSCH). And as Figure 1A shown, the BS 102 receives a signal from the attacker UE 106 on the uplink (UL) 152. As used herein, terms such as UL refer to a second direction from a UE (such as the attacker UE 106, by way of example) to a BS (such as the BS 102, by way of example). The UL 152 may include one or more uplink communication channels, such as a physical uplink control channel (PUCCH) and / or a physical uplink shared channel (PUSCH). In some embodiments, the attacker UE 106 may transmit on the UL 152 while the victim UE 104 is receiving on the DL 150, which may result in CLI 154 in the first wireless network 120 between the victim UE 104 and the attacker UE 106.

[0030] As Figure 1B shown, the second wireless network 120 includes an attacker BS 122, a first UE 124, a victim BS 126, and a second UE 128. As Figure 1B shown, the attacker BS 122 may transmit to the first UE 124 on the DL 170. The DL 170 may include one or more downlink communication channels, such as PDCCH and / or PDSCH. And as Figure 1BAs shown, the victim BS126 can receive from the second UE 128 on the UL 172. The UL 172 can include one or more uplink communication channels, such as PUCCH and / or PUSCH. In some embodiments, the attacking BS122 can transmit on the DL 170 while the victim BS126 is receiving on the UL 172, which may result in a CLI 174 in the second wireless network 120 between the attacking BS122 and the victim BS126.

[0031] The first wireless network 100 and the second wireless network 120 can be configured to operate based on a variety of wireless communication technologies. These technologies can include, but are not limited to, technologies based on the 3rd Generation Partnership Project (3GPP) standards. In some embodiments, the BS102, the attacking BS122, and / or the victim BS126 can include one or more next-generation node Bs (gNBs), one or more radio access nodes (RANs), one or more evolved Node Bs (eNBs), one or more Node Bs, one or more roadside units (RSUs), one or more transmit receive points (TRxP or TRP), etc. In these embodiments, the BS102, the attacking BS122, and / or the victim BS126 can include one or more nodes that are configured to operate based on a variety of wireless communication technologies, such as, but not limited to, technologies based on 3GPP standards. For example, the BS102, the attacking BS122, and / or the victim BS126 can include one or more nodes configured to operate using Rel-15, Rel-16, Rel-17, etc.

[0032] Moreover, in some embodiments, the victim UE 104, the attacking UE 106, the first UE 124, and / or the second UE 128 may include one or more consumer electronic devices, one or more cellular phones, one or more smart phones, one or more feature phones, one or more tablet computers, one or more wearable computing devices, one or more personal digital assistants (PDAs), one or more pagers, one or more wireless handsets, one or more desktop computers, one or more laptop computers, one or more in-vehicle infotainment (IVI) systems, one or more in-vehicle entertainment (ICE) devices, one or more instrument clusters (ICs), one or more head-up display (HUD) devices, one or more on-board diagnostic (OBD) devices, one or more dynamic meter mobile devices (DMEs), one or more mobile data terminals (MDTs), one or more electronic engine management systems (EEMSs), one or more electronic / engine control units (ECUs), one or more electronic / engine control modules (ECMs), one or more embedded systems, one or more microcontrollers, one or more control modules, one or more engine management systems (EMSs), one or more networked or "smart" appliances, one or more machine type communication (MTC) devices, one or more machine-to-machine (M2M) devices, one or more Internet of Things (IoT) devices, and the like. In these embodiments, the victim UE 104, the attacking UE 106, the first UE 124, and / or the second UE 124 may be configured to operate based on a variety of wireless communication technologies, such as but not limited to technologies based on 3GPP standards. For example, the victim UE 104, the attacking UE 106, the first UE 124, and / or the second UE 124 may be configured to operate using Rel-15, Rel-16, Rel-17, and the like.

[0033] Exemplary timing advance that can be implemented in an exemplary wireless network to mitigate CLI

[0034] The following discussion describes exemplary timing advances that may be used to mitigate CLI within the wireless network 100 as described above in Figure 1A However, as those skilled in the relevant art will recognize, these exemplary timing advances are equally applicable to the wireless network 120 as shown in Figure 1B Due to the large transmit power difference between the DL 170 and the UL 172 and / or propagation conditions, CLI may be detrimental to the performance of the first wireless network 100. In Figure 1AIn the exemplary embodiment shown, the attacking UE 106 may transmit a signal on the UL 152 to the BS 102 while the victim UE 104 is receiving a signal from the BS 102 on the DL 150, which may result in a CLI 154 in the first radio network 100 between the victim UE 104 and the attacking UE 106. As will be described in further detail below, the attacking UE 106 may select between a first UE timing advance TA UE.1 or a second UE timing advance TA UE.2 based on the operating mode of the BS 102. And as will be described in further detail below, the attacking UE 106 may select the first UE timing advance TA UE.1 to advance the signal on the UL 152 by the first UE timing advance TA UE.1 such that when the BS 102 is operating in a static time division duplex (TDD) operating mode, the signal on the UL 152 is time-aligned with other signals from other UEs at the BS 102. The first UE timing advance TA UE.1 represents an advance in the timing of the UL frame such that the UL 152 is aligned with other signals from other UEs at the BS 102. Alternatively or in addition, when the BS 102 is operating in a sub-band full duplex (SBFD) operating mode or a dynamic TDD operating mode, the attacking UE 106 may select the second UE timing advance TA UE.2 to advance the signal on the UL 152 by the second UE timing advance TA UE.2 such that the signal on the UL 152 from the attacking UE 106 is time-aligned with the signal on the DL 150 from the BS 102 at the victim UE 104. The second UE timing advance TA UE.2 represents an advance in the timing of the UL frame such that the UL 152 is aligned with the signal on the DL 150 from the BS 102 at the victim UE 104.

[0035] As described above, BS102 can operate in a static TDD operation mode, an SBFD operation mode, or a dynamic TDD operation mode, and in some embodiments, can switch between these operation modes. In some embodiments, the static TDD operation mode represents a half-duplex operation mode, whereby BS102 can transmit signals on DL 150 or receive signals on UL 152, but cannot transmit and receive signals simultaneously. In the static TDD operation mode, the resources allocated by BS102 between DL 150 and UL 152 are fixed or static in the static TDD operation mode. In some embodiments, the static TDD operation mode can represent a conventional TDD operation mode outlined in, for example, Rel-15, Rel-16, Rel-17, etc. In some embodiments, the SBFD operation mode represents a full-duplex operation mode, whereby BS102 can transmit signals on DL 150 and receive signals on UL 152 simultaneously. In these embodiments, the SBFD operation mode is very similar to a frequency division duplex (FFD) operation mode, which can transmit signals on DL 150 and receive signals on UL 152 simultaneously. In some embodiments, the dynamic TDD operation mode represents the other half-duplex operation mode, whereby BS102 can transmit signals on DL 150 or receive signals on UL 152, but does not transmit or receive signals simultaneously in a manner substantially similar to the static TDD operation mode. However, in the dynamic TDD operation mode, BS102 can flexibly adjust the resources allocated between DL 150 and UL 152 in response to, for example, traffic conditions within the wireless network 100.

[0036] Figure 2A and Figure 2B Graphically illustrates exemplary time advances that can be implemented within an exemplary wireless network in accordance with various embodiments of the present disclosure. The following discussion of Figure 2A and Figure 2B is a description of exemplary time advances within the wireless network 100 as described above in Figure 1A . However, as those skilled in the relevant art will recognize, without departing from the spirit and scope of the present disclosure, these exemplary time advances are equally applicable to the wireless network 120 as shown in Figure 1B . As described above, when BS102 is operating in the static TDD operation mode, the attacking UE 106 can advance the signal on UL 152 by a first UE time advance TA UE.1 , or when BS102 is operating in the SBFD operation mode or the dynamic TDD operation mode, advance the signal by a second UE time advance TA UE.2 . The following discussion of Figure 2A is a further description of the first UE time advance TA UE.1, which can be used by the attacking UE 106 to time-align the signal on UL 152 with other signals from other UEs at the BS 102. And the following discussion of Figure 2B is to further describe the second UE timing advance TA UE.2 , which can be used by the attacking UE 106 to time-align the signal on UL 152 with the signal on DL 150 from the BS 102 at the victim UE 104.

[0037] In Figure 2A the exemplary embodiment shown, the attacking UE 106 may send a signal on UL 152 to the BS 102 at the attacking UE TX time 202, and this signal is received by the BS 102 at the BS RX time 206. Although not shown in Figure 2A , these signals on UL 152 from the attacking UE 106 will likely arrive at different times, that is, they are not time-aligned with other signals from other UEs on UL 208 at the BS 102 relative to the BS RX time 206, resulting in interference in the first wireless network 100, such as inter-carrier interference (ICI). In some embodiments, the signals on UL 152 and other signals from other UEs on UL 208 may include a cyclic prefix (CP). In these embodiments, the time misalignment between the signal on UL 152 and other signals from other UEs on UL 208 at the BS RX time 204 may cause these CPs to be misaligned with each other at the BS RX time 204, which may cause ICI in the first wireless network 100. For example, the signals on UL 152 and other signals from other UEs on UL 208 may be orthogonal frequency division multiplexing (OFDM) signals. In this example, when the OFDM signals on UL 152 and other OFDM signals on UL 208 do not have CP alignment with each other at the BS RX time 204, these OFDM signals generally cause ICI at the BS 102.

[0038] However, as Figure 2A shown, when the BS 102 is operating in the static TDD operation mode, the attacking UE 106 may advance the signal on UL 152 by the first UE timing advance TA UE.1 so that the signal on UL 152 is time-aligned with other signals from other UEs on UL 208 at the BS 102. In Figure 2A the exemplary embodiment shown, the attacking UE 106 may advance the signal on UL 152 from the attacking UE TX time 202 by the first UE timing advance TA UE.1Attacker UE TX time 206 advanced to the time. In some embodiments, these signals on UL 152 from attacker UE 106 will arrive at BS RX time 206 substantially simultaneously with other signals from other UEs on UL 208 at BS102, i.e., in time alignment. In some embodiments, the signals on UL 152 and other signals from other UEs on UL 208 may include a cyclic prefix (CP). In these embodiments, the time alignment between the signals on UL 152 and other signals from other UEs on UL 208 at BS RX time 204 may cause these CPs to be aligned with each other at BS RX time 204, which does not result in ICI in the first wireless network 100.

[0039] In Figure 2B the exemplary embodiment shown, BS102 may send a signal on DL 150 to victim UE 104 at BS TX time 222, which is received by victim UE 104 at victim UE RX time 224. And as Figure 2B shown, attacker UE 106 may send a signal on UL 152 to BS102 at attacker UE TX time 226. Although not shown in Figure 2B it, the signals on DL 150 and UL 152 will likely arrive at victim UE 104 at different times (i.e., not in time alignment), resulting in CLI 154 in the first wireless network 100 at victim UE RX time 224. In some embodiments, the signals on DL 150 and UL 152 may include CPs. In these embodiments, the time misalignment between the signals on DL 150 and UL 152 at victim UE 104 may cause these CPs to be misaligned with each other at victim UE RX time 224, which may result in CLI154 in the first wireless network 100. For example, the signals on DL 150 and UL 152 may be OFDM signals. In this example, when these OFDM signals do not have CP alignment with each other at victim UE RX time 224, the OFDM signals on DL 150 and UL 152 generally cause CLI 154 at victim UE 104.

[0040] However, as Figure 2B shown, when BS102 is operating in the SBFD operation mode or the dynamic TDD operation mode, attacker UE 106 may advance the signal on UL 152 by a second UE time advance TA UE.2, so that the signal on UL 152 is time-aligned with the signal on DL 150 at the victim UE 104. In Figure 2B In the exemplary embodiment shown, the attacking UE 106 can advance the signal on UL 152 from the attacking UE TX time 226 by a second UE time advance TA UE.2 to the advanced attacking UE TX time 228. In some embodiments, these signals on UL 152 from the attacking UE 106 will arrive at substantially the same time to be time-aligned relative to the signal on DL 150 at the victim UE 104 at the victim UE RX time 224. In some embodiments, the signals on DL 150 and the signals on UL 152 may include CPs. In these embodiments, the time alignment between the signal on DL 150 and the signal on UL 152 at the victim UE RX time 224 may cause these CPs to be aligned relative to each other at the victim UE RX time 224, which can mitigate the CLI 154 in the first wireless network 100.

[0041] Determining an exemplary timing advance within an exemplary wireless network

[0042] As described above, when the BS 102 is operating in the static TDD operation mode, the attacking UE 106 can utilize the first UE time advance TA UE.1 , or when the BS 102 is operating in the SBFD operation mode or the dynamic TDD operation mode, utilize the second UE time advance TA UE.2 . Generally, when the BS 102 is operating in the static TDD operation mode, the first UE time advance TA UE.1 will be utilized by the attacking UE 106. In some embodiments, the first UE time advance TA UE.1 can be expressed as:

[0043] T TA_LTDD =(N TA_LTDD +N TA,offset_LDD )*T c , (1)

[0044] where T TA_LTDD represents the first UE time advance TA that will be utilized by the attacking UE 106 when the BS 102 is operating in the static operation mode, UE.1 , N TA_LTDD represents the timing measured by the BS 102 that can be provided to the attacking UE 106 within the timing advance command (TAC) from the BS 102, N TA,offset_LDD represents the offset from the timing that can vary based on the frequency band and the subcarrier spacing, and T cRepresents a basic time unit, e.g., 0.509 nanoseconds (ns).

[0045] Similarly, when BS102 is operating in the SBFD operation mode or the dynamic TDD operation mode, a second UE time advance TA to be exploited by the attacking UE106 UE.2 can be expressed as:

[0046] where represents the second UE time advance TA to be exploited by the attacking UE 106 when BS102 is operating in the SBFD operation mode or the dynamic TDD operation mode UE.2 , N TA_SBFD / DTDD represents the timing measured by BS102 that can be provided to the attacking UE 106 within the TAC, N TA,offset_SBFD / DTDD represents the offset from the timing, as will be described in further detail below, and T c represents a basic time unit.

[0047] Signaling of an exemplary timing advance within an exemplary wireless network

[0048] As described above, when BS102 is operating in the static TDD operation mode, the attacking UE 106 can exploit the first UE time advance TA UE.1 , or when BS102 is operating in the SBFD operation mode or the dynamic TDD operation mode, exploit the second UE time advance TA UE.2 . In some embodiments, the attacking UE 106 can receive the first UE time advance TA UE.1 and / or the second UE time advance TA UE.2 from BS 102 on layer 1 signaling, layer 2 signaling, and / or higher layer signaling, such as, by way of example, uplink control information (UCI) for layer 1 signaling, medium access control - control element (MAC-CE) and / or random access response (RAR) with timing advance (TA) information for layer 2 signaling, and radio resource control (RRC) messaging for higher layer signaling.

[0049] In some embodiments, a handshake process may occur between BS102 and the attacking UE 106 to provide the first UE time advance TA to the attacking UE 106 UE.1 . In these embodiments, the handshake process can represent an initial UL synchronization process between BS102 and the attacking UE 106. The initial UL synchronization process can be achieved through a random access process, where BS102 provides a timing advance command (TAC) to the attacking UE 106 in a random access response (RAR). In some embodiments, the RAR may include the first UE time advance TAUE.1 , such as N as described above TA_LTDD Timing. In these embodiments, the timing N for RAR TA_LTDD can be expressed as N TA = T A * 16.64 / 2 μ , where the index value T A is indicated by RAR. Alternatively or in addition, in these embodiments, the handshake process can represent another process, such as between BS102 and the attacking UE106 once UL synchronization is completed. As part of this other process, BS102 can send a TAC to the attacking UE106 on layer 2 signaling, for example, to request the attacking UE106 to adjust the first UE timing advance TA UE.1 , such as N TA_LTDD as described above for timing. In these embodiments, the attacking UE106 can adjust the timing N according to TAnew = N TAlod +(T A - 31)* 16.64 / 2 μ to adjust the timing N TA_LTDD , where the index value T A is indicated by layer 2 signaling. In some embodiments, the layer 2 signaling can indicate a TAG identification (TAGID) and a TAC, where the TAG identification indicates the timing advance group identification for the attacking UE106, and the TAC indicates the index value T A to control the timing advance to be applied by the attacking UE106.

[0050] In some embodiments, BS102 and the attacking UE106 can undergo a handshake process to provide the attacking UE106 with a second UE timing advance TA UE.2 . In these embodiments, the attacking UE106 can receive the second UE timing advance TA from BS102 on layer 1 signaling, layer 2 signaling, and / or higher layer signaling UE.2 , where the layer 1 signaling such as uplink control information (UCI) is provided as an example, the layer 2 signaling such as media access control - control element (MAC - CE) and / or random access response (RAR) with TA (timing alignment) information is provided as some examples, and the higher layer signaling such as radio resource control (RRC) message reception is provided as an example. In these embodiments, BS102 can provide the second UE timing advance TA to the attacking UE106 in a manner substantially similar to the first UE timing advance TA UE.1 as described above UE.2 .

[0051] Alternatively or in addition, when BS102 operates in the SBFD operation mode or the dynamic TDD operation mode, a handshake process may occur between BS102, the victim UE 104, and the attacking UE 106 to provide a second UE timing advance TA to the attacking UE 106 UE.2 . In some embodiments, the victim UE 104 may determine the second UE timing advance TA UE.2 , such as as described above which will be used by the attacking UE 106 to time-align the signal on UL152 from the attacking UE 106 with the signal on DL 150 from BS102 at the victim UE 104. In some embodiments, the victim UE 104 may provide the second UE timing advance TA to BS102, such as on layer 1 signaling (such as UCI) UE.2 . In some embodiments, the UCI may include a new bit field, such as a new timing advance bit field not outlined in the 3GPP standard, to indicate the second UE timing advance TA UE.2 .

[0052] In some embodiments, BS102 may provide DCI to the victim UE 104 to indicate which hybrid automatic repeat request (HARQ) process the victim UE 104 will use when recovering and / or decoding user data on the PDSCH. In these embodiments, the DCI may include a new data indicator (NDI) bit to indicate whether the user data on the PDSCH is new user data or a retransmission of previous user data. In some embodiments, when scheduling the PDSCH, the victim UE 104 may check the NDI bit to determine whether the user data on the PDSCH is new user data or a retransmission of previous user data. In these embodiments, the victim UE 104 may calculate the checksum of the user data on the PDSCH and may report a HARQ report indicating an acknowledgement (ACK) or negative acknowledgement (NACK) of the user data on the PDSCH. In these embodiments, the victim UE104 may append or encode the second UE timing advance TA within the hybrid automatic repeat request-acknowledgement (HARQ-ACK) for the PDSCH UE.2 , and may provide the second UE timing advance TA to BS102 on the same PUCCH indicated by the DCI for the HARQ-ACK UE.2 . Alternatively or in addition, the victim UE 104 may provide the second UE timing advance TA to BS102 on a separate PUCCH and / or a separate PUSCH other than the PUCCH and / or PUSCH indicated by the DCI for the HARQ-ACK, respectively UE.2Alternatively or in addition, the victim UE 104 may provide a second UE time advance TA to the BS 102 on the PUSCH UE.2 , as indicated by layer 2 signaling, such as for example a MAC-CE.

[0053] Exemplary timing advance techniques for managing cross-link interference in a 5G communication system

[0054] Figure 3A FIG. illustrates a flow chart of a first exemplary operation for managing CLI interference within an exemplary wireless network in accordance with various embodiments of the present disclosure. The present disclosure is not limited to this operation description. On the contrary, it will be apparent to those of ordinary skill in the relevant art that other operation control flows are also within the scope and spirit of the present disclosure. The following discussion describes an exemplary operation control flow 300 for managing CLI interference within an exemplary wireless network as described above in Figure 1A , Figure 1B , Figure 2A and / or Figure 2B . The operation control flow 300 may be executed by an electronic device (such as the attacking UE 104 shown in Figure 1A ).

[0055] At operation 302, the operation control flow 300 may identify the operating mode of a base station (BS) within the exemplary wireless network (such as BS 102, by way of example). In some embodiments, the BS may operate in a static TDD operating mode, an SBFD operating mode, or a dynamic TDD operating mode, and in some embodiments, may switch between these operating modes in a manner substantially similar to that described above. In these embodiments, the BS may provide the operating mode of the BS to the operation control flow 300 on layer 1 signaling (such as DCI, by way of example), layer 2 signaling (such as media access control - control element (MAC-CE), by way of example), and / or higher layer signaling (such as radio resource control (RRC) messaging, by way of example).

[0056] At operation 304, the operation control flow 300 may select a time advance associated with the operating mode from operation 302, such as a first UE time advance TA UE.1 or a second UE time advance TA UE.2 . In some embodiments, the first UE time advance TA UE.1 may be associated with the static TDD operating mode, and the second UE time advance TA UE.2 may be associated with the SBFD operating mode or the dynamic TDD operating mode. In some embodiments, when the operating mode of the BS identified at operation 302 is the static TDD operating mode, the operation control flow 300 may select the first UE time advance TA UE.1or select a second UE timing advance (TA) when the operating mode of the BS identified in operation 302 is the SBFD operating mode or the dynamic TDD operating mode UE.2 。In some embodiments, the BS may provide the first UE timing advance TA to the operation control flow 300 in a manner substantially similar to that described above on layer 1 signaling (such as UCI, by way of example), layer 2 signaling (such as media access control - control element (MAC - CE), by way of example), and / or higher layer signaling (such as radio resource control (RRC) messaging, by way of example). UE.1 or the second UE timing advance TA UE.2 。

[0057] At operation 306, the operation control flow 300 may advance the timing of the UL (such as UL 152, by way of example) according to the selected timing advance from operation 304. In some embodiments, the operation control flow 300 may advance the timing of the UL frame structure by the first UE timing advance TA from operation 304 UE.1 such that the signals on the UL are time - aligned with other signals from other UEs at the BS, thereby reducing inter - carrier interference (ICI) at the BS in a manner substantially similar to that described above. In some embodiments, the operation control flow 300 may adjust the timing of the UL frame structure by the second UE timing advance TA from operation 304 in a manner substantially similar to that described above UE.1 such that the signals on the UL are time - aligned with the signals on the DL from the BS at another electronic device (such as the victim UE 104, by way of example).

[0058] At operation 308, the operation control flow 300 may send a signal to the BS on the UL with the timing advance from operation 306.

[0059] Figure 3B Illustrates a flowchart of a second exemplary operation for managing CLI interference within an exemplary wireless network in accordance with various embodiments of the present disclosure. The present disclosure is not limited to this operation description. Instead, it will be apparent to those of ordinary skill in the relevant art that other operation control flows are also within the scope and spirit of the present disclosure. The following discussion describes an exemplary operation control flow 320 for managing CLI interference within the exemplary wireless network as described above in Figure 1A 、 Figure 1B 、 Figure 2A and / or Figure 2B 。The operation control flow 320 may be executed by an electronic device (such as Figure 1B the attacking BS 122 shown).

[0060] At operation 322, the operation control flow 320 may identify the operation mode of a base station (BS) within an exemplary wireless network, such as the attacking BS 122 by way of example. In some embodiments, the BS may operate in a static TDD operation mode, an SBFD operation mode, or a dynamic TDD operation mode, and in some embodiments, may switch between these operation modes in a manner substantially similar to that described above. In these embodiments, the BS may provide the operation mode of the BS to the operation control flow 320 on layer 1 signaling (such as DCI, by way of example), layer 2 signaling (such as media access control - control element (MAC-CE), by way of example), and / or higher layer signaling (such as radio resource control (RRC) messaging, by way of example).

[0061] At operation 324, the operation control flow 320 may select a timing advance associated with the operation mode from operation 322, such as a first BS timing advance TA BS.1 or a second BS timing advance TA BS.2 . In some embodiments, the first BS timing advance TA BS.1 may be associated with the static TDD operation mode, and the second BS timing advance TA BS.2 may be associated with the SBFD operation mode or the dynamic TDD operation mode. In some embodiments, when the operation mode of the BS identified in operation 322 is the static TDD operation mode, the operation control flow 320 may select the first BS timing advance TA BS.1 , or when the operation mode of the BS identified in operation 322 is the SBFD operation mode or the dynamic TDD operation mode, the second BS timing advance TA BS.2 may be selected. In some embodiments, the BS may provide the first BS timing advance TA BS.1 or the second BS timing advance TA BS.2 to the operation control flow 320 on layer 1 signaling (such as UCI, by way of example), layer 2 signaling (such as media access control - control element (MAC-CE), by way of example), and / or higher layer signaling (such as radio resource control (RRC) messaging, by way of example) in a manner substantially similar to that described above.

[0062] At operation 326, the operation control flow 320 may advance the timing of the DL (such as DL 170, by way of example) according to the selected timing advance from operation 324. In some embodiments, the operation control flow 320 may advance the timing of the DL frame structure by the first BS timing advance TA BS.1, so that the signals on the DL are time-aligned with other signals from other BSs at the first UE (such as the first UE 124, by way of example), thereby mitigating inter-carrier interference (ICI) in a manner substantially similar to that described above. In some embodiments, the operation control flow 320 may adjust the timing of the DL frame structure from the second BS timing advance TA from operation 324 in a manner substantially similar to that described above BS.1 , so that the signals on the DL are time-aligned with the signals on the UL from the second UE at another electronic device (such as the victim BS 104, by way of example) (such as the signals on the UL 172 from the second UE 128, by way of example).

[0063] At operation 328, the operation control flow 320 may send a signal on the time-advanced DL from operation 326 to the first UE.

[0064] Exemplary resource scheduling that can be implemented in an exemplary wireless network to mitigate CLI

[0065] Exemplary timing advances that can be used to mitigate CLI within the wireless network 100 and / or the wireless network 120 have been described above. Alternatively or in addition, the wireless network 100 and / or the wireless network 120 may schedule the PDSCH and / or the PUSCH to mitigate CLI within these wireless networks. Figure 4 Exemplary resource scheduling that can be implemented within an exemplary wireless network in accordance with various embodiments of the present disclosure is graphically illustrated. The following discussion of Figure 4 is a description of exemplary resource scheduling within the wireless network 100 as described above in Figure 1A . However, as will be appreciated by those skilled in the relevant art, without departing from the spirit and scope of the present disclosure, this exemplary resource scheduling is equally applicable to the wireless network 120 as shown in Figure 1B .

[0066] As Figure 4 shown, the BS 102 may send a signal on the DL 150 via the PDSCH, which is received by the victim UE 104 at the victim UE RX time 404. In some embodiments, the PDSCH can be divided into multiple time slots. In these embodiments, the BS 102 may allocate resources across the boundaries between the time slots from these multiple time slots to send a signal to the victim UE 104 on the DL 150. For example, as Figure 4 shown, the BS 102 may allocate some of the time slots in time slot three and some of the time slots in time slot four highlighted by the gray shading to send a signal to the victim UE 104 on the DL 150. And as Figure 4As shown, the attacking UE 106 can send a signal on the UL 152 at the attacking UE TX time 406 via the PUSCH, and this signal is received by the victim UE 104 at the victim UE RX time 404. In some embodiments, the BS 102 can allocate resources in the PUSCH to the attacking UE 106, and the resources are time-aligned with the resources allocated to the victim UE 104 in the PDSCH. For example, as Figure 4 shown, the BS 102 can allocate the slot four highlighted by the gray shading to the attacking UE 106, and this slot is time-aligned with the PDSCH allocated to the victim UE 104, that is, some of the slots in slot three and some of the slots in slot four. Thus, at the victim UE RX time 404, the signal on the DL 150 from the BS 102 via the PDSCH and the signal on the UL 152 from the attacking UE 106 via the PUSCH are time-aligned at the victim UE 104.

[0067] Exemplary electronic device that can be implemented within an exemplary wireless network

[0068] Figure 5 illustrates a block diagram of an electronic device for mitigating CLI within an exemplary wireless network according to various embodiments of the present disclosure. In Figure 5 the exemplary embodiment shown, the electronic device 500 can be any electronic device among electronic devices, for example, as Figure 1A shown, the victim UE 104 and / or the attacking UE 104, and / or as Figure 1B shown, the attacking BS 122 and / or the victim BS 125. As Figure 5 shown, the electronic device includes one or more processors 510, one or more transceivers 520, a communication infrastructure 540, a memory 550, an operating system 552, an application 554, and an antenna 560. The Figure 5 various systems shown are provided as exemplary parts of the electronic device 500, and the electronic device 500 may include other circuits and subsystems. Additionally, although the systems of the electronic device 500 are shown as separate components, aspects of the present disclosure may include any combination of these components, fewer components, or more components. Additionally, the electronic device 500 may include any number of processors, transceivers, communication infrastructures, memories, operating systems, applications, and antennas.

[0069] Memory 550 may include random access memory (RAM) and / or cache, and may include control logic (e.g., computer software) and / or data. Memory 550 may include other storage devices or memories, such as but not limited to hard disk drives and / or removable storage devices / units. According to some examples, operating system 552 may be stored in memory 550. Operating system 552 may manage data transfer between memory 550, application 554, processor 510, and / or transceiver 520. In some examples, operating system 552 maintains one or more network protocol stacks (e.g., Internet protocol stack, cellular protocol stack, etc.) that may include multiple logical layers. At the corresponding layer of the protocol stack, operating system 552 includes control mechanisms and data structures to perform functions associated with that layer. In some embodiments, application 554 may be stored in memory 550. Application 554 may include applications used by the wireless electronic device and / or the user of the wireless electronic device (e.g., user applications). Application 554 may include applications such as but not limited to wireless current, video streaming, remote control, and / or other user applications.

[0070] Electronic device 500 may also include communication infrastructure 540. Communication infrastructure 540 provides communication, for example, between processor 510, transceiver 520, and memory 550. In some specific implementations, communication infrastructure 540 may be a bus. Processor 510, together with the instructions stored in memory 550, may perform operations that enable electronic device 500 to mitigate CLI within an exemplary wireless network, as described above in Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3A , Figure 3B and / or Figure 4 .

[0071] According to some aspects, transceiver 520 may send and receive communication signals that support the operation of the electronic device, including but not limited to mitigation of transmission latency, and may be coupled to antenna 560. Antenna 560 may include one or more antennas that may be of the same or different types. Transceiver 520 allows electronic device 500 to communicate with other devices that may be wired and / or wireless. In some examples, transceiver 520 may include a processor, a controller, radio components, sockets, plugs, buffers, and similar circuits / devices for connecting to a network and communicating on the network. According to some examples, transceiver 520 includes one or more circuits for connecting to a wired network and / or a wireless network and communicating on the wired network and / or the wireless network. In some embodiments, transceiver 520 may include a cellular subsystem, a WLAN subsystem, and / or Bluetooth TMSubsystems, each of which includes its own radio transceiver and protocol, as will be understood by those skilled in the art based on the discussion provided herein. In some implementations, transceiver 520 may include more or fewer systems for communicating with other devices. In some embodiments, transceiver 520 may include one or more circuits (including a WLAN transceiver) to enable connection and communication over a WLAN network (such as, but not limited to, a network based on the standards described in IEEE 802.11). Additionally or alternatively, transceiver 520 may include circuits to enable communication based on, for example, Bluetooth. TM Protocol, Bluetooth TM Low Energy Protocol or Bluetooth TM One or more circuits for connection and communication with low-power long-range protocols (including Bluetooth TM For example, the transceiver 520n may include a Bluetooth TM Transceiver. In some embodiments, the transceiver 520 may include one or more circuits (including a cellular transceiver) for connecting to and communicating on a cellular network. Cellular networks may include, but are not limited to, 3G / 4G / 5G networks such as Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), etc. For example, the transceivers 520a-550n may be configured to operate according to one or more of Rel-15, Rel-15, Rel-17, or other 3GPP standards.

[0072] In some embodiments, processor 510 (alone or in combination with computer instructions stored in memory 550) and / or transceiver 520 can mitigate CLI within the exemplary wireless network, as described above in Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3A , Figure 3B and / or Figure 4 Described in .

[0073] Exemplary computer system that can be implemented within an exemplary wireless network

[0074] Figure 6 600 is a block diagram of an exemplary computer system that can be implemented within an exemplary wireless network according to some exemplary embodiments of the present disclosure. Computer system 600 can be any known computer capable of performing the functions described herein, such as Figure 1A The victim UE 104 and / or the attacker UE 104 and / or Figure 1BThe attacking party BS122 and / or the victim party BS126 shown. The computer system 600 includes one or more processors (also known as central processing units or CPUs), such as processor 604. The processor 604 is connected to a communication infrastructure 606 (e.g., a bus). The computer system 600 also includes user input / output devices 603 that communicate with the communication infrastructure 606 through a user input / output interface 602, such as a monitor, keyboard, pointing device, etc. The computer system 600 also includes a main memory or primary storage 608, such as random access memory (RAM). The main memory 608 may include one or more levels of cache. Control logic (e.g., computer software) and / or data has been stored therein in the main memory 608.

[0075] The computer system 600 may also include one or more secondary storage devices or memories 610. The secondary memory 610 may include, for example, a hard disk drive 612 and / or a removable storage device or drive 614. The removable storage drive 614 may be a floppy disk drive, a tape drive, an optical disk drive, an optical storage device, a tape backup device, and / or any other storage device / drive.

[0076] The removable storage drive 614 may interact with a removable storage unit 618. The removable storage unit 618 includes a computer-usable or readable storage device on which computer software (control logic) and / or data has been stored. The removable storage unit 618 may be a floppy disk, a tape, an optical disk, a DVD, an optical storage disk, and / or any other computer data storage device. The removable storage drive 614 reads from and / or writes to the removable storage unit 618 in a known manner.

[0077] According to some aspects, the secondary memory 610 may include other components, tools, or other methods for allowing computer programs and / or other instructions and / or data to be accessed by the computer system 600. Such components, tools, or other methods may include, for example, a removable storage unit 622 and an interface 620. Examples of the removable storage unit 622 and the interface 620 may include a program cartridge and a cartridge interface (such as those found in video game devices), a removable memory chip (such as an EPROM or PROM) and an associated socket, a memory stick and a USB port, a memory card and an associated memory card slot, and / or any other removable storage unit and associated interface.

[0078] The computer system 600 may also include a communication or network interface 624. The communication interface 624 enables the computer system 600 to communicate and interact with any combination of remote devices, remote networks, remote entities, etc. (collectively and individually referred to by reference numeral 628). For example, the communication interface 624 may allow the computer system 600 to communicate with a remote device 628 via a communication path 626, which may be wired and / or wireless and may include any combination of LAN, WAN, the Internet, etc. Control logic and / or data may be sent to and from the computer system 600 via the communication path 626.

[0079] The operations in the foregoing aspects may be implemented in various configurations and architectures. Thus, some or all of the operations in the foregoing aspects may be performed in hardware, in software, or in both hardware and software. In some aspects, a tangible, non-transitory device or article includes a tangible, non-transitory computer-usable or readable medium having control logic (software) stored thereon, also referred to herein as a computer program product or a program storage device. This includes, but is not limited to, the computer system 600, the main memory 608, the secondary memory 610, and the removable storage units 618 and 622, as well as tangible articles embodying any combination of the foregoing. Such control logic, when executed by one or more data processing devices such as the computer system 600, causes such data processing devices to operate as described herein.

[0080] Based on the teachings contained in this disclosure, it will be apparent to those skilled in the relevant art how to make and use aspects of this disclosure using data processing devices, computer systems, and / or computer architectures other than Figure 6 those shown. In particular, the aspects may operate in conjunction with software, hardware, and / or operating system implementations other than those described herein.

[0081] Summary

[0082] Embodiments of the present disclosure may be implemented in hardware, firmware, software applications, or any combination thereof. Embodiments of the present disclosure may also be implemented as instructions stored on one or more computer-readable media, which may be read and executed by one or more processors. A computer-readable medium may include any mechanism for storing or transmitting information in a form readable by a computer (e.g., computing circuitry). For example, a computer-readable medium may include non-transitory computer-readable media such as read-only memory (ROM); random access memory (RAM); magnetic disk storage media; optical storage media; flash memory devices; and the like. Additionally, a computer-readable medium may include transitory computer-readable media such as electrical, optical, acoustic, or other forms of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.). Further, firmware, software applications, routines, instructions have been described as performing certain actions. However, it should be understood that such descriptions are merely for convenience, and such actions are actually performed by computing devices, processors, controllers, or other devices in response to firmware, software applications, routines, instructions, etc.

[0083] It should be understood that the detailed description section, rather than the summary and abstract sections, is intended to be used to interpret the claims. The summary and abstract sections may set forth one or more but not all exemplary embodiments contemplated by the inventors, and thus are not intended to limit the present disclosure and the appended claims in any way.

[0084] The present disclosure has been described above in terms of functional building blocks, which illustrate the implementation of the specified functions and their relationships. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. Alternative boundaries may be defined as long as the specified functions and their relationships are appropriately performed.

[0085] The above description of specific embodiments will fully disclose the general nature of the present disclosure, such that others can, without undue experimentation, readily modify and / or adapt various applications of such specific embodiments by applying knowledge within the scope of the art, without departing from the general concept of the present disclosure. Therefore, based on the teachings and guidance presented herein, such adaptations and modifications are intended to be within the meaning and scope of the equivalents of the embodiments disclosed herein. It should be understood that the language or terminology herein is for the purpose of description and not of limitation, such that the terminology or language of this specification will be interpreted by those skilled in the art in accordance with these teachings and guidance.

[0086] The breadth and scope of the present disclosure should not be limited by any of the above exemplary embodiments, but should be defined only in accordance with the appended claims and their equivalents.

[0087] The present disclosure anticipates that entities responsible for the collection, analysis, disclosure, transfer, storage, or other use of such personal information data will comply with sound privacy policies and / or privacy measures. Specifically, such entities should implement and adhere to the use of privacy policies and measures that are recognized as meeting or exceeding industry or government requirements for maintaining the privacy and security of personal information data. Such policies should be accessible to users and should be updated as the collection and / or use of data changes. Personal information from users should be collected for legitimate and reasonable entity purposes and should not be shared or sold outside of those legitimate purposes. Additionally, such collection / sharing should only occur upon receipt of user informed consent. Additionally, such entities should consider taking any necessary steps to protect and safeguard access to such personal information data and to ensure that other entities with access to personal information data comply with the privacy policies and procedures of other entities. Additionally, such entities may subject themselves to third-party assessments to demonstrate their compliance with widely accepted privacy policies and privacy measures. Additionally, policies and measures should be adapted to the specific types of personal information data being collected and / or accessed and to the applicable laws and standards, including considerations of specific jurisdictions. For example, in the United States, the collection or acquisition of certain health data may be governed by federal and / or state laws such as the Health Insurance Portability and Accountability Act (“HIPAA”); while health data in other countries may be subject to other regulations and policies and should be handled accordingly. Therefore, different privacy measures should be asserted for different types of personal data in each country.

Claims

1. A method for reducing cross-link interference (CLI) in a wireless network, the method comprises: identifying, by a first user equipment (UE) within the wireless network, an operating mode of a base station (BS) within the wireless network; selecting, by the first UE, a timing advance (TA) associated with the operating mode from a plurality of TAs stored in the first UE; advancing, by the first UE, the timing of an uplink (UL) by the selected TA; and transmitting, by the first UE, a signal to the BS on the time-advanced UL.

2. The method according to claim 1, wherein the operating mode comprises: a static time division duplex (TDD) operating mode; a sub-band full duplex (SBFD) operating mode; or a dynamic TDD operating mode.

3. The method according to claim 2, wherein the selection comprises selecting a first TA based on the BS operating in the static TDD operating mode; and wherein the advancing comprises advancing the timing of the UL by the first TA such that the signal on the time-advanced UL is time-aligned with other signals received at the BS from other UEs.

4. The method according to claim 2, wherein the selection comprises selecting a second TA based on the BS operating in the SBFD operating mode or the dynamic TDD operating mode, wherein the advancing comprises advancing the timing of the UL by the second TA such that the signal on the time-advanced UL is time-aligned with a signal on a downlink (DL) from the BS at a second UE within the wireless network.

5. The method according to claim 1, wherein the advancing comprises advancing the timing of a UL frame by the selected TA.

6. The method according to claim 1, further comprises: receiving, by the first UE, the plurality of TAs from the BS on layer 1 signaling.

7. The method according to claim 6, wherein the layer 1 signaling comprises uplink control information (UCI).

8. The method according to claim 1, further comprises: receiving, by the first UE, the plurality of TAs from the BS on layer 2 signaling.

9. The method according to claim 8, wherein the layer 2 signaling comprises a media access control - control element (MAC-CE) or a random access response (RAR) with TA information.

10. A first user equipment (UE), comprises: a processor configured to: identify an operating mode of a base station (BS) within a wireless network; select a TA associated with the operating mode from a plurality of TAs stored in the first UE; and advance the timing of an uplink (UL) by the selected TA; and a transceiver coupled to the processor, the transceiver configured to transmit a signal to the BS on the time-advanced UL.

11. The first UE according to claim 10, wherein the operating mode comprises: a static time division duplex (TDD) operating mode; a sub-band full duplex (SBFD) operating mode; or a dynamic TDD operating mode.

12. The first UE according to claim 11, wherein the processor is configured to: When the BS is operating in the static TDD operation mode, select a first TA; and Advance the timing of the UL by the first TA so that the signal on the time-advanced UL is time-aligned with other signals received at the BS from other UEs.

13. The first UE according to claim 11, wherein the processor is configured to: When the BS is operating in the SBFD operation mode or the dynamic TDD operation mode, select a second TA; and Advance the timing of the UL by the second TA so that the signal on the time-advanced UL is time-aligned with the signal on the downlink (DL) from the BS at a second UE within the wireless network.

14. The first UE according to claim 10, wherein the processor is configured to advance the timing of the UL frame by the selected time advance.

15. The first UE according to claim 10, wherein the transceiver is further configured to receive the plurality of TAs from the BS on layer 1 signaling.

16. The first UE according to claim 15, wherein the layer 1 signaling includes uplink control information (UCI).

17. The first UE according to claim 10, wherein the transceiver is further configured to receive the plurality of TAs from the BS on layer 2 signaling.

18. The first UE according to claim 17, wherein the layer 2 signaling includes medium access control - control element (MAC-CE) or a random access response (RAR) with TA information.

19. A first user equipment (UE), comprising: a memory that stores a first time advance (TA) and a second TA; and a processor configured to: Select the first TA in response to a BS within the wireless network operating in a sub-band full duplex (SBFD) operation mode or a dynamic time division duplex (TDD) operation mode; Advance the timing of the uplink (UL) by the first TA so that the signal on the time-advanced UL is time-aligned with the signal on the downlink (DL) from the BS at a second UE within the wireless network; and Transmit the signal to the base station on the time-advanced UL.

20. The first UE according to claim 19, wherein the processor is further configured to: Select the second TA in response to the BS operating in the static TDD operation mode; and Advance the timing of the UL by the second TA so that the signal on the time-advanced UL is time-aligned with other signals received at the BS from other UEs.

Images