Method for beam-specific power control

Abstract

Systems, methods, apparatus, and computer program products for power control to allow a UE to receive at a similar SINR when transmitting during a CLI time slot and at an Rx beam specific cross-link interference level at a victim base station. A method may include receiving, by a UE, a set of SSB-specific PRACH target received power values associated with a slot set or a symbol set; and determining, by the UE, whether the slot set or symbol set includes RO.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 338,852, filed May 5, 2022, which is incorporated herein by reference in its entirety. Technical Field

[0003] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as long term evolution (LTE), fifth generation (5G) radio access technology (RAT), new radio (NR) access technology, sixth generation (6G) RAT, and / or other communication systems. For example, certain example embodiments may relate to systems and / or methods for beam-specific power control to allow user equipment (UE) to receive with similar signal-to-interference-plus-noise ratio (SINR) when transmitting during cross-link interference (CLI) time slots and receive at receiver (Rx) beam-specific CLI levels at a victim base station. Background Art

[0004] Examples of mobile or wireless telecommunication systems may include radio frequency (RF) 5G RAT, universal mobile telecommunication system (UMTS) terrestrial radio access network (UTRAN), LTE evolved UTRAN (E-UTRAN), advanced LTE (LTE-A), LTE-A Pro, NR access technology, and / or MulteFire Alliance. 5G wireless system refers to the next generation (NG) radio system and network architecture. 5G systems are typically built on 5G NR, but 5G (or NG) networks can also be built on E-UTRA radio. NR is expected to support service categories such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), and massive machine type communications (mMTC). NR is expected to provide extreme broadband, ultra-robust, low latency connectivity, and large-scale networking to support the Internet of Things (IoT). Next generation radio access network (NG-RAN) represents the RAN of 5G, which can provide radio access for NR, LTE, and LTE-A. Note that in 5G, a node that provides radio access functions to a UE (e.g., similar to a Node B in UTRAN or an evolved Node B (eNB) in LTE) may be referred to as a next-generation Node B (gNB) when built on an NR radio, and may be referred to as a next-generation eNB (NG-eNB) when built on an E-UTRA radio. Summary of the invention

[0005] According to some example embodiments, a method may include: calculating, by a network entity, at least one synchronization signal block-specific physical random access channel target received power value. The method may also include: signaling, by the network entity to a user equipment, the at least one synchronization signal block-specific physical random access channel target received power value associated with a time slot set or a symbol set.

[0006] According to certain example embodiments, an apparatus may include means for calculating at least one synchronization signal block-specific physical random access channel target received power value. The apparatus may also include means for signaling to a user equipment the at least one synchronization signal block-specific physical random access channel target received power value associated with a time slot set or a symbol set.

[0007] According to various example embodiments, a non-transitory computer readable medium may be encoded with instructions that, when executed in hardware, may perform a method. The method may include calculating at least one synchronization signal block-specific physical random access channel target received power value. The method may also include signaling to a user equipment the at least one synchronization signal block-specific physical random access channel target received power value associated with a time slot set or a symbol set.

[0008] According to some example embodiments, a computer program product may perform a method. The method may include calculating at least one synchronization signal block specific physical random access channel target received power value. The method may also include signaling the at least one synchronization signal block specific physical random access channel target received power value associated with a time slot set or a symbol set to a user equipment.

[0009] According to certain example embodiments, an apparatus may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, together with the at least one processor, cause the apparatus to at least: calculate at least one synchronization signal block-specific physical random access channel target received power value. The at least one memory and the computer program code may also be configured to, together with the at least one processor, cause the apparatus to at least: signal the at least one synchronization signal block-specific physical random access channel target received power value associated with a time slot set or a symbol set to a user equipment.

[0010] According to various example embodiments, an apparatus may include circuitry configured to calculate at least one synchronization signal block-specific physical random access channel target received power value. The circuitry may also be configured to signal to a user equipment the at least one synchronization signal block-specific physical random access channel target received power value associated with a time slot set or a symbol set.

[0011] According to some example embodiments, a method may include receiving, by a user equipment, a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a time slot set or a symbol set. The method may also include determining, by the user equipment, whether the time slot set or the symbol set includes a random access channel opportunity.

[0012] According to certain example embodiments, an apparatus may include means for receiving a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a set of time slots or a set of symbols. The apparatus may also include means for determining whether the set of time slots or a set of symbols includes a random access channel opportunity.

[0013] According to various example embodiments, a non-transitory computer readable medium may be encoded with instructions that, when executed in hardware, may perform a method. The method may include receiving a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a set of time slots or a set of symbols. The method may also include determining whether the set of time slots or the set of symbols includes a random access channel opportunity.

[0014] According to some example embodiments, a computer program product may perform a method. The method may include receiving a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a time slot set or a symbol set. The method may also include determining whether the time slot set or the symbol set includes a random access channel opportunity.

[0015] According to certain example embodiments, an apparatus may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus to at least: receive a set of physical random access channel target receive power values ​​specific to a synchronization signal block associated with a time slot set or a symbol set. The at least one memory and the computer program code may also be configured to, with the at least one processor, cause the apparatus to at least: determine whether the time slot set or the symbol set includes a random access channel opportunity.

[0016] According to various example embodiments, an apparatus may include circuitry configured to receive a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a time slot set or a symbol set. The circuitry may also be configured to determine whether the time slot set or the symbol set includes a random access channel opportunity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For a proper understanding of the example embodiments, reference should be made to the accompanying drawings, in which:

[0018] Figure 1 shows a co-channel CLI with dynamic time division duplex (TDD);

[0019] Figure 2 shows an example where an Rx beam at a victim base station experiences higher interference than other Rx beams when pointed in the direction of a nearby aggressor base station;

[0020] Figure 3A-3B shows an example of a signaling diagram according to certain example embodiments;

[0021] Figure 4 An example of a flow chart illustrating a method according to various example embodiments;

[0022] Figure 5 An example of a flow chart illustrating another method according to various example embodiments is shown;

[0023] Figure 6 illustrates examples of various network devices according to some example embodiments;

[0024] Figure 7 Examples of 5G network and system architectures are shown in accordance with certain example embodiments. DETAILED DESCRIPTION

[0025] It will be readily appreciated that the components of particular example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of some example embodiments of systems, methods, apparatuses, and computer program products for power control to allow a UE to receive at a similar SINR when transmitting during a CLI timeslot and receive at an Rx beam-specific CLI level at a victim base station is not intended to limit the scope of the particular example embodiments, but rather represents selected example embodiments.

[0026] 3rd Generation Partnership Project (3GPP) Release (Rel) 15NR includes support for dynamic TDD, including coexistence of adjacent channels between operators with dynamic TDD. Performance degradation may be observed in frequency range (FR) 1 macro-to-macro scenarios (not all operators use the same TDD configuration), and in some FR2 macro-to-macro and micro-to-micro scenarios. Therefore, dynamic TDD may be more suitable for low-power indoor base stations.

[0027] In addition to the challenges of coexistence between operators, Figure 1Some challenges of intra-operator co-channel resulting from CLI dynamic TDD are also shown. Various techniques have been introduced in 3GPP Rel-16 that aim to mitigate UE-to-UE intra-operator co-channel CLI (e.g., CLI measurement and reporting). Similarly, 3GPP Rel-14 studied techniques in NR that aim to mitigate gNB-to-gNB CLI, including: advanced gNB receivers capable of rejecting / suppressing gNB-to-gNB CLI; hybrid dynamic / static uplink (UL) / downlink (DL) resource allocation and scheduling coordination techniques (including beam coordination); power control and link adaptation techniques (aimed at implementing different power control and link adaptation configurations based on the expected interference level in the timeslot / symbol); and sensing-based techniques to avoid CLI. However, not all of these techniques have been introduced and / or can be supported in the current NR specifications.

[0028] To enhance dynamic / flexible TDD, there may be solutions to improve the management of inter-gNB and inter-UE CLI processing. For example, in NR, the UE may select an SSB (and corresponding PRACH resource) for path loss estimation and initial access with a synchronization signal reference signal received power (SS-RSRP) above a network configured threshold (rsrp-ThresholdSSB), which may then be signaled by the gNB in ​​the system information block (SIB) 1.

[0029] like Figure 2 As shown in , during beamforming operation at a gNB, high gNB-to-gNB CLI may be observed at one gNB corresponding to a specific slot / symbol (e.g., CLI slot / symbol) and a specific Rx beam. The CLI slot / symbol may refer to a slot / symbol during which the aggressor gNB is transmitting in the DL and the neighbor victim gNB is receiving in the UL.

[0030] During the CLI timeslot, a gNB receiving in the UL may experience greater interference on one or more Rx beams directed toward a nearby aggressor gNB (e.g., when the victim gNB tunes its receiver toward the nearby aggressor gNB). For example, during the CLI timeslot, two UEs (UE#A and UE#B) with similar path loss (i.e., similar transmit power) to the victim gNB may be configured with the same target receive power level. The UE (i.e., UE#A) whose signal is received at the victim gNB using the Rx beam configuration corresponding to the victim gNB may observe high interference and experience low SINR. In contrast, the UE (i.e., UE#B) whose signal is received using the Rx beam configuration corresponding to the victim gNB may experience low interference.

[0031] exist Figure 2In the example with a Grid of Beams (GoB) shown in , the experienced gNB to gNB CLI may depend on the victim gNB Rx beam, and which beam the aggressor gNB uses to transmit. Alternatively, this may be affected by the load in the aggressor gNB and whether single-beam Tx or multi-beam Tx per cell per timeslot is assumed at the aggressor gNB.

[0032] Certain example embodiments described herein may have various benefits and / or advantages to at least overcome the disadvantages described above. Some example embodiments may provide methods for beam-specific power control. For example, certain example embodiments may allow a UE to receive with a similar SINR (compared to a time slot without CLI) and / or improve SINR when transmitting during a CLI time slot, and receive at an Rx beam-specific CLI level at a victim gNB, for example, due to one or more Rx beams of the victim gNB pointing in the direction of a nearby aggressor gNB. By configuring the UE to transmit a physical random access channel (PRACH) during a time slot that experiences an Rx beam-specific interference level (e.g., due to an Rx beam-specific CLI caused by one or more Rx beams of the victim gNB pointing in the direction of a nearby aggressor gNB), the PRACH can be received with a similar SINR independent of the Rx beam, and / or the base station can guide the UE to select an SSB / Rx beam with a low CLI. Therefore, certain example embodiments discussed below relate at least to improvements in computer-related technologies.

[0033] Some example embodiments described herein address the above challenges of a UE performing random access in idle / inactive mode. In the case where the UE is in radio resource control (RRC) connected mode, the gNB may use UE-specific power control (e.g., power control commands in DCI) to modify the transmit power spectral density according to the Rx beam used by the gNB when receiving UL signals from the corresponding UE.

[0034] FIG3 shows an example of a signaling diagram depicting power control to allow a UE to receive at a similar SINR when transmitting during a CLI timeslot and receive at an Rx beam specific CLI level at a victim gNB. According to certain example embodiments, the NE 320 and UE 330 in the example of FIG3 may be similar to Figure 6 NE 610 and UE 620 are shown in FIG.

[0035] As will be discussed in detail below, certain example embodiments may involve dynamic TDD scenarios where each gNB (e.g., NE 320) may have a repeating TDD pattern, for example in the form of DFFFU (or any other TDD pattern (e.g., DFFFFFFFFU)), where "D" refers to a downlink timeslot, "U" refers to an uplink timeslot, and "F" refers to a flexible timeslot that can be used for DL ​​or UL transmissions, as determined independently by each cell (e.g., based on instantaneous traffic demand).

[0036] In various example embodiments, for the corresponding UL transmission, the "F" slots may be considered as CLI slots, while the "U" slots may be considered as non-CLI slots. Alternatively, the NE 320 may be aware of the TDD mode used by the neighbor gNB (e.g., using X n The interface is signaled between gNBs) and can therefore determine which gNB radio timeslots may be subject to CLI. A "slot" (14 OFDM symbols) may be used as the time unit for defining TDD UL / DL switching points; however, any other time unit may be used (e.g., in units of subframes or a specific number of orthogonal frequency division multiplexing (OFDM) symbols).

[0037] At 301, the NE 320 may measure interference levels received on different Rx beams of a set of time slots and / or symbols (e.g., CLI time slots). As an example, the NE 320 may associate interference measurements with time slot types (e.g., CLI time slots or non-CLI time slots), and / or if information about the TDD mode of the aggressor gNB is not available at the victim gNB, the NE 320 may also use interference measurements to identify whether the current time slot is subject to CLI (e.g., if the interference received on a specific time slot is above a specific threshold, the time slot may be considered a CLI time slot).

[0038] Some example embodiments where CSI-RS beams are not available may include GoB operation with a fixed number of Tx / Rx beams per cell and one SSB per beam. Each Rx beam may have a corresponding SSB(DL) beam that the UE 330 may use for path loss / RSRP measurements and beam management. In various example embodiments, interference measurements may be collected separately for different slot types or symbol types (e.g., CLI and non-CLI slots).

[0039] At 302, NE 320 may determine whether the measured interference corresponds to different receiver beams differently. For example, NE 320 may determine the measured SINR corresponding to a specific Rx beam (which may correspond to a specific SSB) as I_CLI_s, where s is the SSB index. NE 320 may use I_CLI_s to ultimately configure SSB-specific PRACH target received power values ​​for UE 330. In various example embodiments, an existing preambleReceivedTargetPower parameter within a 3GPP RACH-ConfigGeneric information element (IE) may be modified so that each corresponding SSB includes multiple preambleReceivedTargetPower values.

[0040] At 303, based on the SINR measured on a specific Rx beam (which may correspond to a specific SSB), NE 320 may calculate at least one SSB-specific PRACH target received power value to be used by UE 330 when transmitting PRACH in a specific time slot / symbol (e.g., the CLI time slot determined at 301).

[0041] In a specific example embodiment, the NE 320 may configure the SSB-specific target received power values ​​to apply only during specific timeslots / symbol sets (i.e., in the presence of CLI), which may occur when the UE 330 is able to distinguish CLI timeslots from non-CLI timeslots based on gNB signaling (e.g., SIB, RRC, etc.). For example, by leveraging the repetitive nature of the TDD mode, the NE 320 may indicate to the UE 330 which specific timeslots are potential CLI timeslots by signaling a bitmap (e.g., 01110 (1=CLI timeslots where the indicated SSB-specific PRACH target received power value is applied, 0=non-CLI timeslots where the default preambleReceivedTargetPower is used)). Each bit may be mapped to one timeslot of the TDD mode (e.g., DFFFU). Alternatively, the NE 320 may signal that any timeslot that is considered flexible according to the TDD configuration defined by the SIB / RRC may be considered a CLI timeslot. Additionally or alternatively, the NE 320 may signal a plurality of SSB-specific PRACH target received power values ​​(eg, P PRACH,target_SSB#n_0 , P PRACH,target_SSB#n_1 ,…P PRACH,target_SSB#n_4 ), where each target received power value can be mapped one-to-one to a corresponding TDD time slot configuration. In general, a higher value of I_CLI_s can correspond to a higher corresponding value of the PRACH target received power value.

[0042] At 304, NE 320 may send, for example, via SIB or RRC signaling, to UE 330 at least one SSB-specific PRACH target received power value configured for a timeslot set or symbol set, and the SSB-specific PRACH target received power value calculated at 303. In some example embodiments, when UE 330 transmits in the UL corresponding to an SSB during a specially configured timeslot / symbol set, UE 330 may apply the SSB-specific PRACH target received power value in a corresponding power control formula, such as P PRACHf,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c}[dBm]. For example, for a PRACH transmission during a timeslot / symbol set (which is indicated as CLI by NE 320 at 304 and associated with a specific Rx beam / SSB at 303), UE 330 may set the PRACH transmit power using an SSB-specific PRACH target receive power value configured for the corresponding SSB in a power control formula. The association / correspondence between PRACH transmission and SSB may be based on an SSB selection performed during a random access procedure. At 305, UE 330 may determine whether a timeslot set or a symbol set includes a random access channel opportunity (RO).

[0043] In various example embodiments, at 306, UE 330 may select an SSB having a highest RSRP from at least one SSB associated with an SSB-specific PRACH target received power value. As an example, UE 330 may select at least one SSB that is above a first threshold (e.g., rsrp-ThresholdSSB). At 307, UE 330 may transmit on resources using the selected SSB at a transmit power calculated based on the PRACH target received power value of the selected SSB. In some example embodiments, UE 330 may select a SSB having a highest RSRP from at least one SSB associated with an SSB-specific PRACH target received power value. As an example, UE 330 may select at least one SSB that is above a first threshold (e.g., rsrp-ThresholdSSB). At 307, UE 330 may transmit on resources using the selected SSB at a transmit power calculated based on the PRACH target received power value of the selected SSB. CMAX ,P_PRACH_target_SSB+PL_SSB) is sent.

[0044] In some example embodiments, at 308, UE 330 may calculate a PRACH transmit power for each of at least one SSB-specific PRACH target receive power value based on the set of SSB-specific PRACH target receive power values ​​received at 304. At 309, UE 330 may select an SSB corresponding to a lowest PRACH transmit power from among a plurality of SSBs having an RSRP above a first threshold based on the received set of SSB-specific PRACH target receive power values. As an example, the maximum power P CMAXIt may be configured to be the same or different for CLI and non-CLI slots (e.g., to reduce UE to UE CLI in CLI slots / symbols). At 310, UE 330 may transmit on resources corresponding to a selected SSB using a transmit power calculated based on a PRACH target receive power value specific to the selected SSB.

[0045] In various example embodiments, at 311, UE 330 may calculate a PRACH transmit power for each of at least one SSB based on the received set of SSB-specific PRACH target received power values. At 312, UE 330 may select from among SSBs received using RSRP above a first threshold and corresponding to a PRACH transmit power that is at least a second threshold lower than a maximum user equipment transmit power. As an example, UE 330 may select based on P CMAX –(P PRACH,target_SSB#n +PL SSB#n )>T to select the strongest SSB, where T is a second threshold configured by the network. The SSB may have the highest RSRP. At 313, UE 330 may transmit on the resource corresponding to the selected SSB using a Tx power calculated based on a PRACH target received power value specific to the selected SSB. For example, UE 330 may transmit based on P_PRACH=min(P CMAX ,P_PRACH_target+PL_SSB) is sent.

[0046] At 314, if the UE 330 determines at 305 that the CLI slot set or symbol set does not include a RO, the UE 330 may transmit on the resources corresponding to the selected SSB using the Tx power calculated based on the common PRACH Rx target power.

[0047] Figure 4 It shows that a NE (e.g. Figure 6 As will be discussed in detail below, certain example embodiments may involve dynamic TDD scenarios, where each gNB may have a repeating TDD pattern, such as in the form of DFFFU (or any other TDD pattern (e.g., DFFFFFFFFU)), where "D" refers to a downlink timeslot, "U" refers to an uplink timeslot, and "F" refers to a flexible timeslot that may be used for DL ​​or UL transmissions, as determined independently by each cell (e.g., based on instantaneous traffic demand).

[0048] In various example embodiments, for the corresponding UL transmission, the "F" slots may be considered as CLI slots, while the "U" slots may be considered as non-CLI slots. Alternatively, the NE may be aware of the TDD mode used by the neighbor gNB (e.g., using X n The interface is signaled between gNBs) and can therefore determine which gNB radio timeslots may be subject to CLI. A "slot" (14 OFDM symbols) may be used as the time unit for defining TDD UL / DL switching points; however, any other time unit may be used (e.g., in terms of subframes or a specific number of OFDM symbols).

[0049] At 401, the method may include: measuring, by the NE, interference levels received on different Rx beams of a set of time slots and / or symbols (e.g., CLI time slots). As an example, the NE may associate interference measurements with time slot types (e.g., CLI time slots or non-CLI time slots), and / or if information about the TDD mode of the aggressor gNB is not available at the victim gNB, the NE 320 may also use interference measurements to identify whether the current time slot is subject to CLI (e.g., if the interference received on a specific time slot is above a specific threshold, the time slot may be considered a CLI time slot).

[0050] Some example embodiments where CSI-RS beams are not available may include GoB operation, where there is a fixed number of Tx / Rx beams per cell and one SSB per beam. Each Rx beam may have a corresponding SSB (DL) beam, and the UE (which may be similar to Figure 6 UE 620 in the communication network can use the SSB (DL) beam for path loss / RSRP measurement and beam management.

[0051] In various example embodiments, interference measurements may be collected for different timeslot types (e.g., CLI timeslots and non-CLI timeslots) separately. Alternatively, if information about the TDD mode of the aggressor gNB is not available at the victim gNB, the NE may also use interference measurements to identify whether the current timeslot is subject to CLI (e.g., if the interference received on a specific timeslot is above a certain threshold, the timeslot may be considered a CLI timeslot).

[0052] At 402, the method may also include: determining, by the NE, whether the measured interference corresponds to different receiver beams differently. For example, the NE may determine the measured SINR corresponding to a specific Rx beam (which may correspond to a specific SSB) as I_CLI_s, where s is the SSB index. The NE may use I_CLI_s to configure the UE with a SSB-specific PRACH target received power value. In various example embodiments, the existing preambleReceivedTargetPower parameter within the 3GPP RACH-ConfigGeneric IE may be modified so that each corresponding SSB includes multiple preambleReceivedTargetPower values.

[0053] At 403, based on the SINR measured on a specific Rx beam (which may correspond to a specific SSB), if the NE determines that the interference corresponds to different Rx beams differently, the method may include: calculating, by the NE, an SSB-specific PRACH target received power value to be used by the UE when transmitting the PRACH in a specific time slot / symbol (e.g., the CLI time slot determined at 401). In addition, the method may also include: associating, by the NE, the interference measurement with a time slot type or a symbol type; and identifying, by the NE, whether the current time slot is affected by CLI based on the interference measurement.

[0054] In a specific example embodiment, the NE may configure SSB-specific target received power values ​​to apply only during specific timeslots / symbol sets (i.e., in the presence of CLI), which may occur when the UE is able to distinguish CLI timeslots from non-CLI timeslots based on gNB signaling (e.g., SIB, RRC, etc.). For example, by leveraging the repetitive nature of the TDD mode, the NE may indicate to the UE which timeslots are potential CLI timeslots by signaling a bitmap (e.g., 01110 (1 = CLI timeslots where the indicated SSB-specific PRACH target received power value applies, 0 = non-CLI timeslots where the default preambleReceivedTargetPower is used)). Each bit may be mapped to one timeslot of the TDD mode (e.g., DFFFU). Alternatively, the NE may signal that any timeslot that is considered flexible according to the TDD configuration defined by the SIB / RRC is a CLI timeslot. Additionally or alternatively, the NE may signal multiple SSB-specific PRACH target received power values ​​(e.g., P PRACH,target_SSB#n_0 , P PRACH,target_SSB#n_1 ,…P PRACH,target_SSB#n_4 ), where each power value can be mapped one-to-one to a corresponding TDD time slot configuration. In general, a higher value of I_CLI_s can indicate a higher corresponding PRACH target received power value.

[0055] After 403, at 404, the method may include: sending, by the NE, for example, via SIB or RRC signaling, to the UE at least one SSB-specific PRACH target received power value configured for a timeslot set or a symbol set, and the SSB-specific PRACH target received power value calculated at 403. In some example embodiments, when the UE transmits in the UL corresponding to the SSB during a specially configured timeslot / symbol set, the UE may apply the SSB-specific PRACH target received power value in a corresponding power control formula, such as P PRACHf,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c}[dBm]. For example, for a PRACH transmission during a time slot / symbol set (which is indicated as CLI by the NE at 404 and associated with a specific Rx beam / SSB at 403), the UE may use the SSB-specific PRACH target received power value configured for the corresponding SSB in the power control formula for setting the PRACH transmit power. The association / correspondence between the PRACH transmission and the SSB may be based on the SSB selection performed during the random access procedure.

[0056] At 405, if the NE determines at 402 that the interference is the same as the correspondence of different Rx beams, the method may include: signaling, by the NE to the UE, the PRACH target received power values ​​of all slots / symbols.

[0057] Figure 5 1 and 2 according to various exemplary embodiments. Figure 6 An example of a flowchart of a method performed by a UE 620) shown in FIG.

[0058] At 501, the method may include: receiving, by a UE, for example, via SIB or RRC signaling, at least one SSB-specific PRACH target received power value configured for a time slot set or a symbol set, and receiving, by a NE (e.g., Figure 6In some example embodiments, when the UE transmits in the UL corresponding to the SSB during a specially configured time slot / symbol set, the UE may apply the SSB-specific PRACH target received power value in the corresponding power control formula. For example, for PRACH transmissions during a time slot / symbol set (which is indicated as CLI by the NE in 501 and is associated with a specific Rx beam / SSB), the UE may use the PRACH target received power value configured for the corresponding SSB in the power control formula for setting the PRACH transmit power. The association / correspondence between the PRACH transmission and the SSB may be based on the SSB selection performed during the random access procedure. At 502, the method may further include: determining, by the UE, whether the CLI time slot set or symbol set includes the RO.

[0059] In various example embodiments, the UE may use an SSB-specific PRACH target received power value (P PRACH,target_SSB#n ) to select an SSB on which to perform an initial random access procedure (i.e., the UE transmits on the PRACH resources corresponding to the selected SSB). For example, in various example embodiments, at 503, if the UE determines at 502 that the CLI time slot set or symbol set includes RO, the UE may select an SSB with the highest RSRP from at least one SSB associated with the SSB-specific PRACH target receive power value based on the received set of SSB-specific PRACH target receive power values. As an example, the UE may select from SSBs that are above a first threshold (e.g., rsrp-ThresholdSSB). At 504, the method may include: transmitting, by the UE, on a resource using the selected SSB with a transmit power calculated according to the PRACH target receive power value of the selected SSB. In some example embodiments, the UE may select an SSB with the highest RSRP based on P_PRACH=min(P CMAX ,P_PRACH_target_SSB+PL_SSB) is sent.

[0060] Alternatively, in a specific example embodiment, at 505, if the UE determines at 502 that the CLI time slot set or symbol set includes RO, the method may include: calculating, by the UE, the PRACH transmit power for each of at least one SSB-specific PRACH target receive power value based on the received set of SSB-specific PRACH target receive power values. At 506, the method may also include: selecting, by the UE, the SSB corresponding to the lowest PRACH transmit power from among a plurality of SSBs having an RSRP higher than a first threshold value based on the received set of SSB-specific PRACH target receive power values. As an example, the maximum power P CMAXIt may be configured to be the same or different for CLI and non-CLI slots (e.g., to reduce UE to UE CLI in CLI slots / symbols). At 507, the UE may transmit on resources using the selected SSB according to the PRACH target received power value for the selected SSB.

[0061] In some example embodiments, at 508, the method may include: calculating, by the UE, a PRACH transmit power for each of at least one SSB based on the received set of SSB-specific PRACH target receive power values. At 509, the method may also include: selecting, by the UE, from among the SSBs received with RSRP above the first threshold, an SSB corresponding to a transmit power based on a signaled SSB-specific PRACH target receive power value that is at least a second threshold lower than the maximum UE transmit power. As an example, the UE may select, based on P CMAX –(P PRACH,target_SSB#n +PL SSB#n )>T to select the strongest SSB, where T is a second threshold configured by the network. At 510, the method may also include: transmitting, by the user equipment, on the resource corresponding to the selected SSB using a Tx power calculated based on a PRACH Rx target received power specific to the selected SSB. For example, the UE may transmit based on P_PRACH=min(P CMAX ,P_PRACH_target+PL_SSB) is sent.

[0062] At 511, if the UE determines at 502 that the CLI slot set or symbol set does not include the RO, the method may include transmitting, by the user equipment, on a resource corresponding to the selected SSB using a Tx power calculated based on a common PRACH Rx target power.

[0063] Figure 6 An example of a system according to certain example embodiments is shown. In an example embodiment, a system may include a plurality of devices, such as NE 610 and / or UE 620.

[0064] NE 610 may be one or more of: a base station (eg, an eNB or a gNB), a serving gateway, a server, and / or any other access node or a combination thereof.

[0065] The NE 610 may also include at least one gNB-CU, which may be associated with at least one gNB-DU. The at least one gNB-CU and the at least one gNB-DU may communicate with each other via at least one F1 interface, at least one X n -C interface and / or communicate via at least one NG interface of 5GC.

[0066] UE 620 may include one or more of the following: a mobile device (e.g., a mobile phone, a smart phone, a personal digital assistant (PDA), a tablet computer, or a portable media player), a digital camera, a pocket camcorder, a video game console, a navigation unit (e.g., a global positioning system (GPS) device), a desktop or laptop computer, a single-location device (e.g., a sensor or a smart meter), or any combination thereof. In addition, NE 610 and / or UE 620 may be one or more of a Citizen Broadband Radio Service Device (CBSD).

[0067] NE 610 and / or UE 620 may include at least one processor, indicated as 611 and 621, respectively. Processors 611 and 621 may be embodied by any computing or data processing device, such as a central processing unit (CPU), an application specific integrated circuit (ASIC), or the like. The processor may be implemented as a single controller or multiple controllers or processors.

[0068] At least one memory may be provided in one or more devices, as indicated at 612 and 622. The memory may be fixed or removable. The memory may include computer program instructions or computer code contained therein. The memories 612 and 622 may independently be any suitable storage device, such as a non-transitory computer-readable medium. A hard disk drive (HDD), random access memory (RAM), flash memory or other suitable memory may be used. The memory may be combined on a single integrated circuit as a processor, or may be separated from one or more processors. In addition, the computer program instructions stored in the memory and that may be processed by the processor may be computer program codes in any suitable form, such as a compiled or interpreted computer program written in any suitable programming language.

[0069] Processors 611 and 621, memories 612 and 622, and any subset thereof, may be configured to provide components corresponding to the various blocks of FIGS. 3-5. Although not shown, the device may also include positioning hardware (e.g., GPS) or micro-electromechanical system (MEMS) hardware, which may be used to determine the location of the device. Other sensors are also permitted and may be configured to determine location, altitude, velocity, orientation, etc., such as a barometer, compass, etc.

[0070] like Figure 6As shown in , transceivers 613 and 623 may be provided, and one or more devices may also include at least one antenna, indicated as 614 and 624, respectively. The device may have many antennas, such as an antenna array configured for multiple-input multiple-output (MIMO) communication, or multiple antennas for multiple RATs. For example, other configurations of these devices may be provided. Transceivers 613 and 623 may be transmitters, receivers, both transmitters and receivers, or units or devices that may be configured for both transmission and reception.

[0071] The memory and computer program instructions may be configured to, together with a processor of a particular device, cause a hardware apparatus (e.g., a UE) to perform any of the processes described above (i.e., Figures 3-5). Thus, in certain example embodiments, a non-transitory computer-readable medium may be encoded with computer instructions that, when executed in hardware, perform a process, such as one of the processes described herein. Alternatively, certain example embodiments may be performed entirely in hardware.

[0072] In a specific example embodiment, the device may include a circuit configured to perform any of the processes or functions shown in Figures 3-5. For example, the circuit may be a pure hardware circuit implementation, such as an analog and / or digital circuit. In another example, the circuit may be a combination of hardware circuits and software, such as a combination of analog and / or digital hardware circuits with software or firmware, and / or any part of a hardware processor (including a digital signal processor) with software, software, and at least one memory, which work together to enable the device to perform various processes or functions. In yet another example, the circuit may be a hardware circuit and / or a processor, such as a microprocessor or a part of a microprocessor, which includes software (e.g., firmware) to operate. When the operation of the hardware is not required, the software in the circuit may not exist.

[0073] Figure 7 Examples of 5G network and system architectures according to certain example embodiments are shown. A number of network functions are shown, which may be implemented as software operating as part of a network device or dedicated hardware, as a network device itself or dedicated hardware, or as virtual functions operating as a network device or dedicated hardware. Figure 7 The NE and UE shown in the figure may be similar to NE 610 and UE 620, respectively. The user plane function (UPF) may provide services such as intra-RAT and inter-RAT mobility, routing and forwarding of data packets, inspection of packets, user plane quality of service (QoS) processing, buffering of downlink packets, and / or triggering of downlink data notifications. The application function (AF) may mainly interface with the core network to facilitate application use of service routing and interact with the policy framework.

[0074] According to certain example embodiments, the processors 611 and 621 and the memories 612 and 622 may be included in a processing circuit or a control circuit, or may form a part of a processing circuit or a control circuit. In addition, in some example embodiments, the transceivers 613 and 623 may be included in a transceiver circuit, or may form a part of a transceiver circuit.

[0075] In some example embodiments, an apparatus (e.g., NE 610 and / or UE 620) may include components for performing the methods, processes, or any variants discussed herein. Examples of components may include one or more processors, memories, controllers, transmitters, receivers, and / or computer program codes for causing operations to be performed.

[0076] In various example embodiments, the device 610 can be controlled by a memory 612 and a processor 611 to calculate a physical random access channel target receive power value specific to at least one synchronization signal block; and to signal to a user equipment at least one synchronization signal block specific physical random access channel target receive power value associated with a time slot set or a symbol set.

[0077] Specific example embodiments may relate to an apparatus comprising components for performing any of the methods described herein, including, for example, components for calculating at least one synchronization signal block-specific physical random access channel target receive power value; and components for signaling to a user equipment at least one synchronization signal block-specific physical random access channel target receive power value associated with a cross-link interference time slot set or symbol set.

[0078] In various example embodiments, the device 620 can be controlled by a memory 622 and a processor 621 to receive a set of physical random access channel target receive power values ​​specific to a synchronization signal block associated with a time slot set or a symbol set; and determine whether the time slot set or the symbol set includes a random access channel opportunity.

[0079] Certain example embodiments may relate to an apparatus comprising components for performing any of the methods described herein, including, for example, components for receiving a set of physical random access channel target receive power values ​​specific to a synchronization signal block associated with a time slot set or a symbol set; and components for determining whether the time slot set or the symbol set includes a random access channel opportunity.

[0080] The features, structures, or characteristics of the example embodiments described in this specification may be combined in one or more example embodiments in any suitable manner. For example, the use of the phrases "various embodiments," "specific embodiments," "some embodiments," or other similar language in this specification refers to the fact that a particular feature, structure, or characteristic described in conjunction with the example embodiments may be included in at least one example embodiment. Therefore, the phrases "in various embodiments," "in specific embodiments," "in some embodiments," or other similar language appearing in this specification do not necessarily refer to the same set of example embodiments, and the described features, structures, or characteristics may be combined in one or more example embodiments in any suitable manner.

[0081] Additionally, if desired, the different functions or processes discussed above may be performed in different orders and / or simultaneously with each other. Furthermore, if desired, one or more functions or processes described may be optional or may be combined. Therefore, the above description should be viewed as an illustration of the principles and teachings of specific example embodiments, rather than as a limitation thereof.

[0082] Those of ordinary skill in the art will readily appreciate that the example embodiments discussed above may be practiced using processes in a different order, and / or using hardware elements in configurations other than those disclosed. Therefore, although some embodiments have been described based on these example embodiments, those skilled in the art will appreciate that certain modifications, variations, and alternative configurations will be apparent while still within the spirit and scope of the example embodiments.

[0083] Partial Glossary

[0084] 3GPP Third Generation Partnership Project

[0085] 5G Fifth Generation

[0086] 5GC Fifth Generation Core

[0087] 5GS Fifth Generation System

[0088] 6G Sixth Generation

[0089] ASIC Application-Specific Integrated Circuit

[0090] BS Base Station

[0091] CBSD Citizens Broadband Radio Service Device

[0092] CE Control Elements

[0093] CG Configuration License

[0094] CG-SDT Configuration License Small Data Transfer

[0095] CLI Cross Link Interference

[0096] CN Core Network

[0097] CPU Central Processing Unit

[0098] DCI Downlink Control Information

[0099] DL Downlink

[0100] eMBB Enhanced Mobile Broadband

[0101] eMTC Enhanced Machine Type Communication

[0102] eNB Evolved Node B

[0103] eOLLA Enhanced Outer Loop Link Adaptation

[0104] EPS Evolved Packet System

[0105] FR Frequency Range

[0106] gNB Next Generation Node B

[0107] GoB Beam Grid

[0108] GPS Global Positioning System

[0109] HDD Hard Drive

[0110] IE Information Elements

[0111] LTE Long Term Evolution

[0112] LTE-A Long Term Evolution Advanced

[0113] MAC Media Access Control

[0114] MEMS Micro-Electro-Mechanical Systems

[0115] MIMO Multiple Input Multiple Output

[0116] mMTC Massive Machine Type Communications

[0117] MTC Machine Type Communication

[0118] NAS Non-Access Stratum

[0119] NB-IoT Narrowband Internet of Things

[0120] NE Network Entity

[0121] NG Next Generation

[0122] NG-eNB Next Generation Evolved Node B

[0123] NG-RAN Next Generation Radio Access Network

[0124] NR New Radio

[0125] NR-U New Radio Unlicensed

[0126] OFDM Orthogonal Frequency Division Multiplexing

[0127] OLLA Outer Loop Link Adaptation

[0128] PDA Personal Digital Assistant

[0129] PRACH Physical Random Access Channel

[0130] PUSCH Physical Uplink Shared Channel

[0131] QoS Quality of Service

[0132] RACH Radio Access Channel

[0133] RAM Random Access Memory

[0134] RAN Radio Access Network

[0135] RAR Random Access Response

[0136] RAT Radio Access Technology

[0137] RE Resource Element

[0138] RF

[0139] RLC Radio Link Control

[0140] RO Radio Access Channel Opportunity

[0141] RRC Radio Resource Control

[0142] RSRP Reference Signal Received Power

[0143] SDT Small Data Transfer

[0144] SIB System Information Block

[0145] SINR Signal to Interference and Noise Ratio

[0146] SMF session management functions

[0147] SSB Synchronous Signal Block

[0148] TDD Time Division Duplex

[0149] SS-RSRP Synchronization signal reference signal received power

[0150] Tx Transmitter

[0151] UE User Equipment

[0152] UL Uplink

[0153] UMTS Universal Mobile Telecommunications System

[0154] UPF User Plane Function

[0155] URLLC Ultra-Reliable and Low-Latency Communications

[0156] UTRAN Universal Mobile Telecommunications System Terrestrial Radio Access Network

[0157] WLAN Wireless Local Area Network

[0158] xDD Cross-Division Duplex Solution

Claims

1. A method comprising: The network entity calculates a physical random access channel target received power value specific to at least one synchronization signal block; as well as A physical random access channel target received power value specific to the at least one synchronization signal block associated with a time slot set or a symbol set is signaled by the network entity to the user equipment.

2. The method according to claim 1, wherein: The set of time slots or symbols includes cross-link interference time slots.

3. The method according to any one of claims 1 or 2, further comprising: measuring, by a network entity, interference on different receiver beams during at least the set of time slots or symbols; as well as A determination is made by the network entity as to whether the measured interference corresponds differently to different receiver beams.

4. The method according to any one of claims 1 to 3, further comprising: Associating, by the network entity, the interference measurement with a timeslot type or a symbol type; as well as Whether a current time slot or symbol is subject to cross-link interference is identified by the network entity based on the interference measurement.

5. The method according to any one of claims 1 to 4, wherein: The interference measurements are collected for different time slot types or symbol types respectively.

6. The method according to any one of claims 1 to 5, wherein: The at least one synchronization signal block-specific physical random access channel target received power value is configured to be applied only during a specific set of time slots or symbols.

7. A method comprising: Receiving, by a user equipment, a set of physical random access channel target received power values ​​specific to a synchronization signal block associated with a set of time slots or a set of symbols; as well as A determination is made by the user equipment whether the set of time slots or the set of symbols includes a random access channel opportunity.

8. The method according to claim 7, wherein: The set of time slots or symbols includes cross-link interference time slots.

9. The method according to any one of claims 7 or 8, further comprising: The user equipment determines at least one selected synchronization signal block and physical random access channel transmit power to be used corresponding to the time slot set or symbol set based on a set of physical random access channel target receive power values ​​specific to the synchronization signal block.

10. The method according to any one of claims 7 to 9, further comprising: Selecting, by the user equipment, a synchronization signal block having a highest reference signal received power; as well as The user equipment transmits on the resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

11. The method according to any one of claims 7 to 10, further comprising: The user equipment calculates a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of physical random access channel target receive power values ​​specific to the received synchronization signal blocks; The user equipment selects, based on a set of physical random access channel target received power values ​​specific to the received synchronization signal blocks, a synchronization signal block corresponding to a lowest physical random access channel transmit power from a plurality of synchronization signal blocks having a reference signal received power higher than a first threshold; as well as The user equipment transmits on the resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

12. The method according to any one of claims 7 to 10, further comprising: The user equipment calculates a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of physical random access channel target receive power values ​​specific to the received synchronization signal blocks; selecting, by the user equipment, a synchronization signal block having a highest reference signal received power from among a plurality of synchronization signal blocks received using a reference signal received power higher than a first threshold and corresponding to a physical random access channel transmit power lower than a maximum user equipment transmit power by at least a second threshold; as well as The user equipment transmits on the resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

13. The method according to any one of claims 7 to 12, wherein: The association between the physical random access channel transmission and the synchronization signal block is based at least on the synchronization signal block selected during the random access procedure.

14. The method according to any one of claims 7 to 13, wherein: The set of synchronization signal block-specific physical random access channel target received power values ​​is configured to be applied only during a specific set of time slots or symbols.

15. An apparatus comprising: at least one processor; as well as at least one memory including computer program code, The at least one memory and the computer program code are configured to, together with the at least one processor, cause the apparatus to at least: Calculating a physical random access channel target received power value specific to at least one synchronization signal block; and A physical random access channel target received power value specific to the at least one synchronization signal block associated with a set of time slots or a set of symbols is signaled to the user equipment.

16. The device according to claim 15, wherein: The set of time slots or symbols includes cross-link interference time slots.

17. The device according to any one of claims 15 or 16, wherein: The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: measuring interference on different receiver beams during at least the set of time slots or symbols; as well as A determination is made as to whether the measured interference corresponds differently to different receiver beams.

18. The device according to any one of claims 15 to 17, wherein: The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: associating the interference measurement with a slot type or a symbol type; and Based on the interference measurement, it is identified whether a current time slot or symbol is subject to cross-link interference.

19. The device according to any one of claims 15 to 18, wherein: The interference measurements are collected for different time slot types or symbol types respectively.

20. The device according to any one of claims 15 to 19, wherein: The at least one synchronization signal block-specific physical random access channel target received power value is configured to be applied only during a specific set of time slots or symbols.

21. An apparatus comprising: at least one processor; as well as at least one memory including computer program code, The at least one memory and the computer program code are configured to, together with the at least one processor, cause the apparatus to at least: receiving a set of synchronization signal block-specific physical random access channel target received power values ​​associated with a set of time slots or a set of symbols; and A determination is made as to whether the set of time slots or symbols includes a random access channel opportunity.

22. The device according to claim 21, wherein The set of time slots or symbols includes cross-link interference time slots.

23. The device according to any one of claims 21 or 22, wherein The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: Based on the set of physical random access channel target received power values ​​specific to the synchronization signal block, at least one selected synchronization signal block and physical random access channel transmit power to be used corresponding to the time slot set or symbol set is determined.

24. The device according to any one of claims 21 to 23, wherein: The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: selecting a synchronization signal block having a highest reference signal received power; as well as Transmitting on resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

25. The device according to any one of claims 21 to 24, wherein: The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: calculating a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of physical random access channel target receive power values ​​specific to the received synchronization signal blocks; Selecting, based on a set of received synchronization signal block-specific physical random access channel target received power values, a synchronization signal block corresponding to a lowest physical random access channel transmit power from among a plurality of synchronization signal blocks having a reference signal received power higher than a first threshold; as well as Transmitting on resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

26. The device according to any one of claims 21 to 24, wherein: The at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to at least: calculating a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of physical random access channel target receive power values ​​specific to the received synchronization signal blocks; selecting a synchronization signal block having a highest reference signal received power from among a plurality of synchronization signal blocks received using a reference signal received power higher than a first threshold and corresponding to a physical random access channel transmit power lower than a maximum user equipment transmit power by at least a second threshold; as well as Transmitting on resources corresponding to the selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

27. The device according to any one of claims 21 to 26, wherein: The interference measurements are collected for different time slot types or symbol types respectively.

28. The device according to any one of claims 21 to 27, wherein: The set of synchronization signal block-specific physical random access channel target received power values ​​is configured to be applied only during a specific set of time slots or symbols.

29. An apparatus comprising: A component for calculating a target received power value of a physical random access channel specific to at least one synchronization signal block; as well as Means for signaling to a user equipment a physical random access channel target received power value specific to said at least one synchronization signal block associated with a set of time slots or a set of symbols.

30. The device according to claim 29, wherein: The set of time slots or symbols includes cross-link interference time slots.

31. The apparatus according to any one of claims 29 or 30, further comprising: means for measuring interference on different receiver beams during at least said set of time slots or symbols; as well as Means for determining whether measured interference corresponds differently to different receiver beams.

32. The apparatus according to any one of claims 29 to 31, further comprising: means for associating the interference measurement with a slot type or a symbol type; as well as Means for identifying whether a current time slot or symbol is subject to cross-link interference based on the interference measurement.

33. The device according to any one of claims 29 to 32, wherein: The interference measurements are collected for different time slot types or symbol types respectively.

34. The device according to any one of claims 29 to 33, wherein: The at least one synchronization signal block-specific physical random access channel target received power value is configured to be applied only during a specific set of time slots or symbols.

35. An apparatus comprising: means for receiving a set of physical random access channel target received power values ​​specific to a synchronization signal block associated with a set of time slots or a set of symbols; as well as Means for determining whether the set of time slots or symbols includes a random access channel opportunity.

36. The device according to claim 35, wherein The set of time slots or symbols includes cross-link interference time slots.

37. The apparatus according to any one of claims 35 or 36, further comprising: A component for determining at least one selected synchronization signal block and physical random access channel transmit power to be used corresponding to the time slot set or symbol set based on a set of physical random access channel target receive power values ​​specific to the synchronization signal block.

38. The apparatus according to any one of claims 35 to 37, further comprising: means for selecting a synchronization signal block having a highest reference signal received power; as well as Means for transmitting on resources corresponding to a selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

39. The apparatus according to any one of claims 35 to 38, further comprising: means for calculating a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of received synchronization signal block specific physical random access channel target receive power values; means for selecting, based on a set of received synchronization signal block-specific physical random access channel target received power values, a synchronization signal block corresponding to a lowest physical random access channel transmit power from among a plurality of synchronization signal blocks having a reference signal received power higher than a first threshold; as well as Means for transmitting on resources corresponding to a selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

40. The apparatus according to any one of claims 35 to 38, further comprising: means for calculating a physical random access channel transmit power for each synchronization signal block in a plurality of synchronization signal blocks based on a set of received synchronization signal block specific physical random access channel target receive power values; means for selecting a synchronization signal block having a highest reference signal received power from among a plurality of synchronization signal blocks received using a reference signal received power above a first threshold and corresponding to a physical random access channel transmit power at least a second threshold lower than a maximum user equipment transmit power; as well as Means for transmitting on resources corresponding to a selected synchronization signal block using a transmit power calculated based on a physical random access channel target received power value specific to the selected synchronization signal block.

41. The device according to any one of claims 35 to 40, wherein: The association between the physical random access channel transmission and the synchronization signal block is based at least on the synchronization signal block selected during the random access procedure.

42. The device according to any one of claims 35 to 41, wherein: The set of synchronization signal block-specific physical random access channel target received power values ​​is configured to be applied only during a specific set of time slots or symbols.

43. A non-transitory computer readable medium comprising program instructions stored thereon for executing the method according to any one of claims 1-14.

44. An apparatus comprising circuitry configured to perform the method according to any one of claims 1-14.

45. A computer program product encoded with instructions for performing the method according to any one of claims 1-14.

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