Wireless communication methods of initial / random access in SBFD symbols / slots configured within TDD DL or flexible symbols / slots, user equipment, and base station
By configuring separate uplink power control and time domain resources for SBFD symbols/slots, the solution addresses coverage and latency issues in TDD systems, enhancing random access efficiency and spectral efficiency in 5G NR networks.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHENZHEN TCL NEW-TECH CO LTD
- Filing Date
- 2024-10-15
- Publication Date
- 2026-04-23
AI Technical Summary
Conventional TDD systems face challenges such as reduced coverage and increased latency due to limited uplink transmission time, and existing SBFD systems require improved power control mechanisms for efficient random access in subband full duplex symbols/slots.
The proposed solution involves configuring 2-step and 4-step RACH in SBFD symbols/slots with separate uplink power control parameters for msgA and Msg1/Msg3 transmissions, utilizing additional msgA ROs and POs in SBFD symbols/slots, and introducing new PRACH configuration tables for time domain resource allocation.
This enhances uplink coverage, reduces latency, and optimizes resource allocation by enabling efficient random access in SBFD symbols/slots, improving spectral efficiency and minimizing interference.
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Figure CN2024125011_23042026_PF_FP_ABST
Abstract
Description
WIRELESS COMMUNICATION METHODS OF INITIAL / RANDOM ACCESS IN SBFD SYMBOLS / SLOTS CONFIGURED WITHIN TDD DL OR FLEXIBLE SYMBOLS / SLOTS, USER EQUIPMENT, AND BASE STATIONTECHNICAL FIELD
[0001] The present disclosure relates to the field of wireless communication systems, and more particularly, to wireless communication methods of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, a user equipment (UE) , and a base station.BACKGROUND
[0002] The rapid increase in user equipments (UEs) and diverse use cases in next-generation wireless systems have driven a need for higher spectral efficiency, leading to the widespread adoption of Time Division Duplex (TDD) systems. However, conventional TDD systems face challenges like reduced coverage and increased latency due to limited uplink transmission time. To address these issues, 3GPP introduced a study on subband full duplex (SBFD) operation, enabling simultaneous downlink (DL) and uplink (UL) transmissions at a base station. This includes exploring random access procedures and the need for separate uplink power control for SBFD and non-SBFD symbols / slots, which is still under investigation.SUMMARY
[0003] An object of the present disclosure is to propose wireless communication methods of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, a user equipment (UE) , and a base station, which can solve issues in the prior art and other issues.
[0004] In a first aspect of the present disclosure, a wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a base station, comprises performing a configuration of 2-step random access channel (RACH) configuration in SBFD symbols / slots to SBFD aware user equipment (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and configuring at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.
[0005] In a second aspect of the present disclosure, a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a base station, comprises performing a configuration of 4-step RACH in SBFD symbols / slots to SBFD aware user equipments (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, and configuring at least one uplink (UL) power control parameter to the UEs, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.
[0006] In a third aspect of the present disclosure, a wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a user equipment (UE) , comprises receiving a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to from a base station, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and being configured with at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.
[0007] In a fourth aspect of the present disclosure, a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a user equipment (UE) , comprises receiving a configuration of 4-step RACH in SBFD symbols / slots, and being configured with at least one uplink (UL) power control parameter, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.
[0008] In a fifth aspect of the present disclosure, a user equipment (UE) comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.
[0009] In a sixth aspect of the present disclosure, a base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.
[0010] In a seventh aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
[0011] In an eighth aspect of the present disclosure, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
[0012] In a ninth aspect of the present disclosure, a computer readable storage medium, in which a computer program is stored, causes a computer to execute the above method.
[0013] In a tenth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
[0014] In an eleventh aspect of the present disclosure, a computer program causes a computer to execute the above method.BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to illustrate the embodiments of the present disclosure or related art more clearly, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.
[0016] FIG. 1 is a schematic diagram illustrating an example of MsgA configured in SBFD symbols / slots and non-SBFD symbols / slots according to an embodiment of the present disclosure.
[0017] FIG. 2A is a schematic diagram illustrating an example of MsgA RO and MsgA PO configured in SBDF and non-SBFD symbols / slots according to an embodiment of the present disclosure.
[0018] FIG. 2B is a schematic diagram illustrating an example of additional MsgA PO configured in SBDF and non-SBFD symbols / slots according to an embodiment of the present disclosure.
[0019] FIG. 3 is a schematic diagram illustrating an example of time resources of PRACH configuration indexes from the current specification according to an embodiment of the present disclosure.
[0020] FIG. 4A is a flowchart illustrating 2 step RACH in SBFD symbols / slots and / or non-SBFD symbols / slots according to an embodiment of the present disclosure.
[0021] FIG. 4B is a flowchart illustrating a configuration of 2 step RACH in SBFD symbols / slots according to an embodiment of the present disclosure.
[0022] FIG. 4C is a flowchart illustrating a wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a base station according to an embodiment of the present disclosure.
[0023] FIG. 4D is a flowchart illustrating a wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a user equipment (UE) according to an embodiment of the present disclosure.
[0024] FIG. 5 is a schematic diagram of a starting time location of additional msgA PO in SBFD symbols / slots according to an embodiment of the present disclosure.
[0025] FIG. 6A is a flowchart illustrating 4 step RACH in SBFD symbols / slots and / or non-SBFD symbols / slots according to an embodiment of the present disclosure.
[0026] FIG. 6B is a flowchart illustrating a configuration of 4 step RACH in SBFD symbols / slots according to an embodiment of the present disclosure.
[0027] FIG. 6C is a flowchart illustrating a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a base station according to an embodiment of the present disclosure.
[0028] FIG. 6D is a flowchart illustrating a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a user equipment (UE) according to an embodiment of the present disclosure.
[0029] FIG. 7 is a block diagram of one or more user equipments (UEs) and a base station of communication in a communication network system according to an embodiment of the present disclosure.
[0030] FIG. 8 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.DETAILED DESCRIPTION OF EMBODIMENTS
[0031] Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.
[0032] The next generation wireless communication systems are witnessing an exponential growth in the number of user equipments (UEs) and diversified use cases, leading to a massive increase in data traffic. This surge in traffic has resulted in stringent requirements for improved spectral efficiency. To meet these demands, Time Division Duplex (TDD) systems have become widely adopted in commercial New Radio (NR) deployments. Unlike Frequency Division Duplex (FDD) systems, which use separate frequency bands for downlink (DL) and uplink (UL) , TDD systems utilize the same spectrum (frequency band) for both DL and UL transmissions by assigning different time slots. This allows for more efficient use of the available spectrum.
[0033] In conventional TDD systems, time domain resources are divided into downlink (DL) , uplink (UL) , and flexible slots or symbols, where the flexible slots can be allocated as DL, UL, or as guard periods for DL-UL switching. However, the limited allocation of uplink transmission time in conventional TDD systems leads to certain disadvantages, such as reduced coverage, increased latency, and lower overall system capacity.
[0034] Study the subband non-overlapping full duplex and potential enhancements on dynamic / flexible TDD including identifying possible schemes and evaluate their feasibility and performances, studying inter-gNB and inter-UE CLI handling and identify solutions to manage them, considering intra-subband CLI and inter-subband CLI in case of the subband non-overlapping full duplex, and studying the performance of the identified schemes and the impact on legacy operation assuming their co-existence in co-channel and adjacent channels.
[0035] In Release 18 (Rel-18) , the baseline for sub-band non-overlapping full duplex (SBFD) operation was established. It was agreed that the existing TDD slot format can be utilized for configuring SBFD operation. Specifically, an uplink (UL) subband can be configured within downlink (DL) or flexible symbols / slots, allowing for greater flexibility in resource allocation. Additionally, it was agreed that semi-static, cell-common signaling such as TDD-UL-DL ConfigCommon can be employed to indicate and configure the time and frequency locations of SBFD operations to UEs in the Radio Resource Control (RRC) connected state. This allows for efficient coordination and flexibility in scheduling simultaneous DL and UL transmissions, enhancing spectral efficiency while minimizing interference in SBFD operations.
[0036] In Release 19 (Rel-19) , the 3GPP RAN working group approved a work item, revised during the RAN Plenary 104 meeting, to further specify the time and frequency domain configurations of SBFD subbands for UEs in RRC_CONNECTED mode. This work item focuses on supporting random access in SBFD symbols / slots for UEs in RRC_CONNECTED mode, as well as defining SBFD operation for UEs in RRC_IDLE / INACTIVE mode. The primary objectives of this Rel-19 work item includes the following:
[0037] Random Access in RRC_CONNECTED Mode: UEs in RRC_CONNECTED mode are able to initiate random access in SBFD symbols / slots. This involves specifying how UEs can transmit and receive during SBFD symbols / slots and manage their uplink (UL) transmissions while ensuring coexistence with downlink (DL) receptions in the same SBFD symbol / slot. Specific procedures and signaling mechanisms may be defined to handle random access requests and grant resource allocations efficiently.
[0038] Random Access in RRC_IDLE / INACTIVE Mode: For UEs in RRC_IDLE or RRC_INACTIVE modes, random access in SBFD symbols / slots is necessary to enable efficient transitions from idle / inactive states to connected states. The specifications may focus on how UEs in these modes can perform random access during SBFD operation, including power control, timing advance, and resource allocation mechanisms, ensuring minimal interference and efficient use of SBFD resources.
[0039] The primary motivation for enabling random access in sub-band non-overlapping full duplex (SBFD) symbols is to significantly enhance uplink (UL) coverage and reduce the latency associated with random and initial access. This capability improves the Physical Random Access Channel (PRACH) and Message 3 (Msg3) coverage, which are critical for successful access and resource requests in 5G networks. By offloading random access procedures from the fixed uplink slots to SBFD symbols / slots, network flexibility is increased, enabling more efficient use of resources and reducing contention during access attempts.
[0040] During the RAN1#116 meeting, several key conclusions were drawn regarding the benefits of supporting random access in SBFD symbols / slots for UEs in RRC_IDLE / INACTIVE states: Enhanced UL Coverage: Random access in SBFD symbols / slots can provide better uplink coverage by utilizing the flexible nature of SBFD, allowing UEs to access the network in less favorable coverage conditions. Reduced Initial Access Latency: By allowing UEs to perform random access in SBFD symbols / slots, the initial access process becomes faster, reducing the time required to transition from idle or inactive states to a connected state. Improved PRACH and Msg3 Coverage: Utilizing SBFD symbols / slots for random access enhances PRACH and Msg3 coverage, especially in scenarios with dense traffic or poor signal conditions.
[0041] If Physical Random Access Channel (PRACH) transmissions are allowed in SBFD symbols / slots for SBFD-aware UEs in RRC_IDLE / INACTIVE mode, the RAN1 working group observed several potential benefits and challenges: Reduced Random Access Latency: PRACH transmissions in SBFD symbols / slots can expedite the random access procedure, reducing the overall latency for UEs transitioning from idle / inactive states to connected states. Reduced PRACH Collision Probability: By enabling PRACH in SBFD symbols / slots, the likelihood of PRACH collisions is minimized, as random access can be spread across more resources. Additionally, this allows more contiguous frequency resources for PUSCH in uplink (UL) slots, improving overall uplink efficiency. Improved PRACH Coverage: In cases where UL resources are sparse, allowing PRACH in SBFD symbols / slots can enhance the coverage of the random access process, ensuring more reliable access even in challenging environments. Increased Cell Range for PRACH: Similar to coverage improvements, enabling PRACH in SBFD symbols / slots with sparse UL resources can also extend the cell range for PRACH, allowing UEs farther from the cell to successfully initiate access. UE-to-UE Cross-Link Interference (CLI) : However, RAN1 also noted the potential for UE-to-UE CLI in some deployment scenarios, particularly when PRACH transmissions occur in the UL subband of SBFD symbols / slots. This interference is similar to what occurs with UEs in RRC_CONNECTED mode. Initial studies, based on evaluation results from two companies, suggest that the downlink (DL) performance degradation caused by UE-to-UE CLI due to PRACH transmission in SBFD symbols / slots is not significant for certain deployment scenarios, such as indoor office and urban macro environments.
[0042] According to the current specification of TS38.213, the UL power control parameters of MsgA RO can be determined according to the following equation: PPRACH, b, f, c (i) =min {PCMAX, f, c (i) , PPRACH, target, f, c+PLb, f, c} [dBm] , where the PPRACHtarget, f, c can be configured according to the following parameters such as msgA-preambleReceivedTargetPower and msgA-DeltaPreamble or preambleReceivedTargetPower and DeltaPreamble. Similarly, the UL power control parameters for the msgA PUSCH occasion can be determined using the following equation:
[0043] In cases where the P0-PUSCH-alphaset is configured to the UE, the UE follows this configuration for power control during PUSCH transmissions. However, if the P0-PUSCH-alphaset is not provided, the UE can instead rely on two parameters: msgA-preambleReceivedTargetPower and msgA-DeltaPreamble, both of which are configured to the UE for the msgA Random Access Occasion (RO) . These parameters allow the UE to calculate its transmission power during the random access procedure. According to 3GPP specification 38.213, these power control mechanisms ensure that the UE can appropriately manage its transmission power during random access even in the absence of an explicit P0-PUSCH-alphaset configuration.
[0044] If a UE established dedicated RRC connection using a Type-2 random access procedure, as described in clause 8, and is not provided P0-PUSCH-AlphaSet, or for a PUSCH transmission for Type-2 random access procedure as described in clause 8.1A, j=0, PO_UE_PUSCH, b, f, c (0) =0, and PO_NOMINAL_PUSCH, f, c (0) = PO_PRE+ΔMsgA_PUSCH, where PO_PRE is provided by msgA-preambleReceivedTargetPower, or by preambleReceivedTargetPower if msgA-preambleReceivedTargetPower is not provided and ΔMsgA_PUSCH is provided by msgA-DeltaPreamble or deltaPreamble, or ΔMsgA_PUSCH=ΔPREAMBLE_Msg3 dB if msgA-DeltaPreamble and deltaPreamble are not provided, for carrier f of serving cell c.
[0045] Some embodiments of the present disclosure relate to the 5G New Radio (NR) communication system, specifically addressing the uplink (UL) power control for initial and random access procedures in sub-band non-overlapping full duplex (SBFD) symbols. Some embodiments of the present disclosure also focus on the indication and configuration of time-domain resources for initial and random access in SBFD symbols / slots, ensuring more efficient use of spectrum and improved system performance. In one embodiment, the system dynamically allocates UL transmission power for random access in SBFD symbols / slots based on the availability of key parameters. If the P0-PUSCH-AlphaSet is not configured for a UE during a random access procedure, the system will utilize the parameters msgA-preambleReceivedTargetPower and msgA-DeltaPreamble to calculate the appropriate transmission power for the UE. If these parameters are not provided, the system defaults to using preambleReceivedTargetPower and a predefined offset, Delta_ (PREAMBLE_Msg3) , to determine the power level. This flexible power control mechanism ensures that the UE can efficiently manage its uplink transmissions even when full power control configurations are unavailable. Additionally, some embodiments of the present disclosure address the indication of time-domain resources for initial and random access in SBFD symbols / slots, ensuring that UEs can access the network in both SBFD and non-SBFD symbols / slots. To optimize network resource utilization, some embodiments of the present disclosure also establish a prioritization mechanism between MsgA transmissions in SBFD symbols / slots and legacy MsgA transmissions in non-SBFD symbols / slots. This prioritization ensures that additional msgA transmissions in SBFD symbols / slots can coexist with legacy operations, minimizing interference and improving overall system efficiency.
[0046] Through these mechanisms, some embodiments of the present disclosure enhance the flexibility, coverage, and performance of random access procedures in 5G NR systems, particularly when operating with SBFD symbols / slots. This solution provides significant benefits, including reduced random access latency, improved UL coverage, and optimized resource allocation for both SBFD-aware and legacy UEs.
[0047] Terminology and Definitions Used in Some Embodiments of the Present Disclosure:
[0048] MsgA-RO: Refers to the configured time and frequency resources for the Random Access Channel (RACH) occasion where the UE transmits preambles of the PRACH to the gNB.
[0049] MsgA-PO: Refers to the configured time and frequency resources for the Physical Uplink Shared Channel (PUSCH) occasion where the UE transmits PUSCH payload to the gNB.
[0050] Additional / New MsgA-RO: Introduced by some embodiments of the present disclosure, it defines the time and frequency resources for the msgA RACH occasion located in SBFD symbols / slots, where the UE transmits PRACH preambles to the gNB in the SBFD symbols / slots.
[0051] Additional / New MsgA-PO: Introduced by some embodiments of the present, it defines the time and frequency resources for the msgA PUSCH occasion located in SBFD symbols / slots, where the UE transmits msgA PUSCH to the gNB in the SBFD symbols / slots.
[0052] Preamble Received Target Power: The UL received target power level at the gNB receiver, configured to the UE by the gNB for msg1 RACH occasions. The target power is specified in dBm, where dBm represents a power unit for uplink power control.
[0053] MsgA Preamble Received Target Power: The UL received target power level at the gNB receiver, configured to the UE by the gNB for MsgA RACH or MsgA PUSCH occasions. The target power is specified in dBm, used for uplink power control.
[0054] Alpha: Defines possible values of the path-loss compensation coefficient for uplink power control.
[0055] P0-PUSCH-alphaset: A set of values in dBm, including P0 values and alpha values, for uplink power control.
[0056] P0-PUSCH-alphaset-SBFD: A set of values in dBm, introduced by this disclosure, which includes P0 values and alpha values specifically for PUSCH uplink power control in SBFD symbols / slots.
[0057] Additional / New msgA: Refers to the msgA (including both the RO and PO) located in SBFD symbols / slots.
[0058] Beta: A scaling factor introduced by some embodiments of the present disclosure to adjust uplink power control for the preamble received target power of the msgA RO in SBFD symbols / slots relative to msgA RO in non-SBFD symbols / slots.
[0059] Sigma: A scaling factor introduced by this disclosure to adjust uplink power control for P0, alpha, and closed-loop power control parameters in SBFD symbols / slots relative to those in non-SBFD symbols / slots.
[0060] Eta (η) : A scaling factor introduced by some embodiments of the present disclosure to adjust the uplink power control for the preamble received target power of the msg1 RACH occasion in SBFD symbols / slots relative to the msg1 RACH occasion in non-SBFD symbols / slots.
[0061] This terminology and these definitions are essential for understanding the operation of the uplink power control and random access procedures in SBFD symbols / slots as presented in some embodiments of the present disclosure.
[0062] Problem #1: 2-step RACH in SBFD Symbols / Slots:
[0063] Issue 1-1: UL Power Control for msgA-RO and msgA-PO in SBFD and Non-SBFD Symbols / Slots:
[0064] As mentioned in the above examples that the interference levels in SBFD symbols / slots are different from those in non-SBFD symbols. Moreover, the antenna configuration in SBFD symbols differs from that in non-SBFD symbols / slots. Therefore, it is beneficial to support separate uplink (UL) power control for msgA (including RACH occasion and PUSCH occasion) in SBFD and non-SBFD symbols / slots. However, msgA (including msgA RO and msgA PO) is configure in different symbol types such as in SBFD symbols / slots and non-SBFD symbols / slots, it may require separate uplink (UL) power control and / or spatial relation. In this issue some embodiments assume the following three cases and its UL power control:
[0065] Case 1: Example of Additional msgA in SBFD Symbols / Slots and Legacy msgA in Non-SBFD Symbols / Slots:
[0066] In this embodiment, the system is configured to manage msgA transmissions (comprising the RO and the Physical Uplink Shared Channel (PUSCH) Occasion (PO) ) across both SBFD symbols / slots and non-SBFD symbols / slots, as illustrated in FIG. 1.
[0067] Some embodiments of the present disclosure introduce an additional msgA, which includes both the msgA-RO and msgA-PO, with its associated Demodulation Reference Signal (DMRS) resources specifically located within the SBFD symbols / slots. Meanwhile, the legacy msgA, including its RO and PO, is located within traditional non-SBFD symbols / slots, operating in a conventional Time Division Duplex (TDD) framework where uplink (UL) and downlink (DL) transmissions occur in separate time intervals.
[0068] Uplink Power Control: The interference characteristics and antenna configurations differ between SBFD and non-SBFD symbols / slots. As such, separate uplink (UL) power control mechanisms are required for msgA transmissions in both symbol types. The additional msgA in SBFD symbols / slots requires an uplink power control configuration tailored to manage the interference caused by simultaneous DL and UL transmissions in the same frequency band, while the legacy msgA in non-SBFD symbols / slots follows the standard UL power control methodology used for conventional TDD systems.
[0069] Time and Frequency Domain Resource Allocation: In this embodiment, the additional msgA in SBFD symbols / slots utilizes a distinct set of time and frequency resources for its RACH and PUSCH occasions. These resources are allocated to ensure minimal interference with the legacy msgA operating in non-SBFD symbols / slots, enabling both msgA configurations to coexist efficiently. The Demodulation Reference Signal (DMRS) resources associated with the additional msgA are similarly located within the SBFD symbols / slots, ensuring proper reception and decoding of the transmitted messages.
[0070] Prioritization Between Additional and Legacy msgA: The system is designed to prioritize the additional msgA in SBFD symbols / slots over the legacy msgA in non-SBFD symbols / slots when necessary. This prioritization ensures that the additional msgA, which benefits from the improved spectral efficiency and reduced latency of full-duplex operation, can be transmitted without interruption. However, mechanisms are in place to ensure that the legacy msgA in non-SBFD symbols / slots continues to function without significant degradation when both msgA transmissions occur simultaneously.
[0071] Example Scenario: As illustrated in FIG. 1, the additional msgA (including RO and PO) and its associated DMRS resources are configured in the SBFD symbols / slots, enabling full-duplex operation where uplink and downlink transmissions occur simultaneously in different sub-bands. The legacy msgA (including RO and PO) , by contrast, is configured in non-SBFD symbols / slots, operating in the conventional TDD framework with separate time slots for UL and DL transmissions.
[0072] In Case 1, where the additional msgA (including RO and PO) is configured in SBFD symbols / slots and the legacy msgA is configured in non-SBFD symbols / slots, several important issues arise that necessitate further study: Separate UL Power Control Configurations for msgA-RO in SBFD and Non-SBFD Symbols / slots: The additional msgA-RO in SBFD symbols / slots and the legacy msgA-RO in non-SBFD symbols / slots each require distinct uplink (UL) power control configurations due to the different interference characteristics and antenna configurations of these symbols / slots. Further study is needed to determine how these separate power control settings can be optimally configured and managed.
[0073] UL Power Control for msgA-PO in SBFD and Non-SBFD Symbols / Slots: Configuring the UL power control parameters for the additional msgA-PO in SBFD symbols / slots versus the legacy msgA-PO in non-SBFD symbols / slots presents another challenge. Since the UL transmission conditions (interference levels, antenna configuration, and power requirements) differ between these symbol types, further investigation is needed to establish optimal strategies for handling this configuration. The focus should be on minimizing interference and maintaining efficiency while ensuring that both msgA-PO transmissions in SBFD and non-SBFD symbols / slots are properly managed through adaptive power control settings.
[0074] Complexity of Determining msgA-PO UL Power Control with P0-PUSCH-AlphaSet: When a P0-PUSCH-alphaset is provided to the UE, it introduces complexity in configuring the UL power control for msgA-PO in both SBFD and non-SBFD symbols / slots. Typically, the P0-PUSCH-alphaset is used to define the power control settings for the PUSCH in non-SBFD symbols / slots, but additional considerations are necessary to manage UL power in SBFD symbols / slots. The challenge here is ensuring that the P0-PUSCH-alphaset can accommodate the distinct requirements of SBFD and non-SBFD symbols / slots within a single configuration. This may require separate parameters for each symbol type or a method for dynamically adjusting the power control settings based on the symbol type currently in use.
[0075] To resolve these issues, further studies are required to: Define the appropriate UL power control configurations for msgA-RO in both SBFD and non-SBFD symbols / slots.
[0076] Case 2: Example of Additional msgA RO in SBFD Symbols / Slots and Payload on PUSCH in Non-SBFD UL Symbols / Slots. In some embodiments, the system configures the additional msgA RO in SBFD symbols / slots, while the PUSCH payload is transmitted in non-SBFD UL symbols / slots, either in a different set of physical resource blocks (PRBs) or in the same set of resource blocks (RBs) , as illustrated in FIG. 2A.
[0077] Separate Resource Allocation: The additional msgA RO in SBFD symbols / slots utilizes distinct resources for random access in the uplink (UL) while the PUSCH payload transmission occurs in non-SBFD UL symbols / slots. This allows for simultaneous downlink (DL) and UL transmissions in SBFD symbols (due to full-duplex operation) , while maintaining traditional TDD uplink transmission for the PUSCH payload in non-SBFD symbols / slots. The system may configure the PUSCH payload to use either a different set of PRBs or the same set of RBs that are allocated for the msgA RO in SBFD symbols / slots, depending on network requirements and resource availability.
[0078] UL Power Control Challenges: In this scenario, there are challenges associated with managing uplink (UL) power control when the msgA RO is in SBFD symbols / slots and the PUSCH payload is in non-SBFD symbols / slots. Since the interference levels and antenna configurations differ between SBFD and non-SBFD symbols / slots, separate UL power control settings are required for msgA RO in SBFD symbols / slots and PUSCH payload transmission in non-SBFD symbols / slots. Special consideration is needed when the PUSCH payload is transmitted on the same set of RBs as the msgA RO, as this requires careful management of the power control to avoid interference between the SBFD and non-SBFD transmissions.
[0079] Time and Frequency Domain Coordination: The system can effectively manage the time and frequency domain resources between the additional msgA RO in SBFD symbols / slots and the PUSCH transmission in non-SBFD symbols / slots. This coordination is particularly important if the same set of RBs is used for both SBFD and non-SBFD symbols / slots. In such cases, the system may ensure that the resource allocation does not lead to a collision or interference between the two symbol types, and that full-duplex capabilities are optimized in SBFD symbols / slots.
[0080] Power Control Parameter Adjustments: FIG. 2A illustrates how separate power control parameters for msgA RO in SBFD symbols / slots and PUSCH in non-SBFD symbols / slots are applied, either based on different or the same RBs. For cases where P0-PUSCH-alphaset is used, the system may determine how to appropriately configure the power control to ensure that msgA RO and PUSCH transmissions remain efficient and do not interfere with each other. If separate PRBs are used, power control settings can be more distinct. However, if the same set of RBs is used, additional complexity arises in managing power control to account for the varying interference conditions in SBFD and non-SBFD transmissions.
[0081] Example Scenario: As depicted in FIG. 2A, the additional msgA RO is configured in SBFD symbols / slots, which allows for simultaneous DL and UL transmissions. The PUSCH payload is transmitted in non-SBFD UL symbols / slots, either in a different set of PRBs or the same set of RBs as used for msgA RO. Some embodiments of the present disclosure manage the separate power control configurations for the msgA RO in SBFD symbols / slots and the PUSCH transmission in non-SBFD symbols / slots. This separation of power control ensures that transmissions remain efficient, and that interference between SBFD and non-SBFD transmissions is minimized, particularly when the same RBs are used.
[0082] Case 2 illustrates how the system can flexibly allocate resources and manage power control for msgA RO and PUSCH transmissions across SBFD and non-SBFD symbols / slots, providing enhanced performance in full-duplex and traditional TDD configurations.
[0083] In Case 2, where the additional msgA RO is located in SBFD symbols / slots and the PUSCH payload is configured in non-SBFD UL symbols / slots, several challenges arise, necessitating further study:
[0084] Separate UL Power Control Configurations for Additional msgA RO in SBFD and Legacy msgA RO in Non-SBFD Symbols / Slots: The additional msgA RO in SBFD symbols / slots and the legacy msgA RO in non-SBFD symbols / slots have distinct interference characteristics due to the different operational environments (SBFD allows simultaneous DL and UL transmissions, while non-SBFD operates with separate time slots) . This requires separate UL power control settings for both the additional msgA RO and the legacy msgA RO to ensure optimized performance and minimize interference. Further study is needed to determine the appropriate strategies for managing these separate configurations, particularly when switching between SBFD and non-SBFD symbols / slots during msgA RO transmissions.
[0085] Uncertainty in Determining UL Power Control for msgA PO Without P0-PUSCH-AlphaSet: When the P0-PUSCH-alphaset is not provided to the UE, uncertainty arises in how the UE should determine its UL power control for the msgA PO transmission, especially in scenarios involving both SBFD and non-SBFD symbols / slots. Specifically, the question is whether the UE should base its UL power control on the msgA-preambleReceivedTargetPower and / or msgA-DeltaPreamble values configured for the additional msgA RO in SBFD symbols / slots, or whether it should refer to the settings for the legacy msgA RO in non-SBFD symbols / slots. This uncertainty could impact the UE's ability to optimize its transmission power and avoid interference, leading to potential performance degradation.
[0086] Investigation of Separate Power Control Configurations: Further study is necessary to clearly define the separate UL power control settings for the additional msgA RO in SBFD symbols / slots and the legacy msgA RO in non-SBFD symbols / slots. This includes determining how to dynamically adjust the power control when msgA RO is configured across different types of symbols / slots and how to ensure seamless transitions between them.
[0087] Case 3: Example of Additional msgA RO in SBFD Symbols / Slots and msgA PO Crossing SBFD and Non-SBFD Boundaries: In this embodiment, the additional msgA RO is located within SBFD symbols / slots, while the additional msgA Physical Uplink Shared Channel (PUSCH) Occasion (PO) crosses the boundary between SBFD symbols / slots and non-SBFD symbols / slots, with parts of the msgA PO located in both SBFD and non-SBFD symbols / slots. The legacy msgA (including both the RO and PO) remains fully located within the non-SBFD symbols / slots, as illustrated in FIG. 2B.
[0088] UL Power Control Considerations: Cross-Symbol Power Control: The system can dynamically manage UL power control for the msgA PO, adjusting the power settings as the transmission moves from SBFD symbols / slots (with full-duplex operation) to non-SBFD symbols / slots (with traditional TDD operation) . Power Scaling and Interference Mitigation: Separate power scaling factors and interference mitigation techniques may be required to ensure that the msgA PO does not introduce interference in either symbol type, particularly during the transition between SBFD and non-SBFD symbols / slots. In conclusion, Case 3 illustrates the complexity and importance of managing msgA transmissions when they span multiple symbol types, requiring careful coordination of power control, resource allocation, and prioritization to ensure efficient operation in 5G NR systems.
[0089] In Case 3, where the additional msgA RO is located in SBFD symbols / slots and the msgA PO crosses the boundary between SBFD and non-SBFD symbols / slots, several challenges and considerations emerge that require further study: Separate UL Power Control Configurations for Additional msgA RO in SBFD Symbols / Slots and Legacy msgA RO in Non-SBFD Symbols / Slots: The additional msgA RO in SBFD symbols / slots and the legacy msgA RO in non-SBFD symbols / slots may require separate uplink (UL) power control configurations due to the different interference environments and antenna configurations. SBFD symbols / slots operate under full-duplex conditions, where simultaneous UL and DL transmissions occur, while non-SBFD symbols / slots follow traditional Time Division Duplex (TDD) rules. This difference necessitates unique power control settings for the msgA RO in each case, ensuring that the power is appropriately managed based on the characteristics of each symbol type.
[0090] Based on the analysis of Case 3 and similar scenarios, this disclosure proposes enhancements to the following parameters in the current 3GPP specifications for additional msgA (including RO and PO) configured in SBFD symbols / slots, relative to the legacy msgA configured in non-SBFD symbols / slots: msgA-preambleReceivedTargetPower: In SBFD symbols / slots, the msgA-preambleReceivedTargetPower may need to be adjusted to account for the higher levels of interference due to simultaneous DL / UL transmissions. The power target for SBFD symbols / slots can be separately configurable from non-SBFD symbols / slots to ensure optimal performance.
[0091] msgA-DeltaPreamble: The msgA-DeltaPreamble parameter, which adjusts the UE's preamble transmission power, may need to be enhanced for SBFD symbols / slots to compensate for varying interference conditions compared to non-SBFD symbols / slots. Separate DeltaPreamble values for SBFD and non-SBFD symbols / slots could allow for more precise control over preamble power levels.
[0092] P0-PUSCH-alphaset: The P0-PUSCH-alphaset defines the UL power control baseline and scaling factors for PUSCH transmissions. For msgA PO crossing both SBFD and non-SBFD symbols / slots, the P0-PUSCH-alphaset may need to include distinct settings for SBFD and non-SBFD symbols / slots to account for the different operational characteristics and interference levels. This may allow the UE to dynamically adjust its UL power control as the msgA PO transitions between the two types of symbols / slots.
[0093] Closed Loop Power Control: Enhancements to closed-loop power control are necessary to ensure that UL transmissions are effectively managed when msgA PO spans both SBFD and non-SBFD symbols / slots. The system can be able to dynamically adjust the power control loop based on feedback from the gNB, allowing for real-time adaptation to the interference and signal quality in each type of symbol / slot. Closed-loop power control in SBFD symbols / slots may require faster and more responsive adjustments due to the simultaneous DL / UL operation, compared to non-SBFD symbols / slots, which follow traditional UL / DL separation in time.
[0094] Enhancing these parameters may improve the performance of msgA RO and PO configurations in SBFD symbols / slots while maintaining compatibility with legacy configurations in non-SBFD symbols / slots. These enhancements are essential for optimizing power control, reducing interference, and ensuring efficient resource utilization in 5G NR systems that support both SBFD and non-SBFD operations. Further studies are needed to validate the effectiveness of these proposed adjustments and ensure seamless transitions between symbol types during msgA transmissions.
[0095] Issue 1-2: Time Domain Resources Allocation for msgA RO and PO:
[0096] According to the current 3GPP specification, the time domain parameters for msgA RO are indicated through the msgA-PRACH configuration index, which points to the time domain resources (sub-frame indices) in predefined tables within the specification (e.g., TS 38.211 Tables 6.3.3.2-2 to 6.3.3.2-4) . These tables are designed to align transmission time resources with uplink slots in the TDD UL-DL pattern, ensuring proper configuration for PRACH transmissions in FR1 / FR2 unpaired spectrum.
[0097] When considering the time domain resources for msgA RO in SBFD symbols / slots, the existing tables are not suitable. This is because: The SBFD symbols are configured in TDD D / F symbols (where simultaneous downlink and uplink transmissions occur in different sub-bands) . The current tables, however, were designed for locating msgA RACH occasions in UL symbols / slots, where downlink and uplink occur in separate time slots. The mismatch arises as the current tables assume traditional TDD uplink and downlink separation, which is not applicable to SBFD configurations that operate under full-duplex conditions.
[0098] As shown in FIG. 3, the PRACH configuration indexes (e.g., 4 and 5) are mapped using a common TDD slot pattern such as DDDSUDDSUU, which alternates between downlink (D) , uplink (U) , and special (S) slots. In this pattern, the time domain resources for msgA RO in SBFD symbols cannot be effectively aligned using the same configuration tables, as these tables are structured for locating PRACH occasions within purely uplink slots, not SBFD slots that support simultaneous DL and UL.
[0099] The current tables in TS 38.211 do not support the unique requirements of SBFD symbols / slots, where the uplink sub-band is embedded within a full-duplex symbol / slot that simultaneously supports downlink transmissions. The time domain resources for msgA RO in SBFD symbols / slots need to account for this difference, ensuring that UL resources are properly aligned within the SBFD framework while maintaining compatibility with traditional TDD patterns.
[0100] To resolve these issues, the following enhancements to the current specification are proposed:
[0101] Introduction of SBFD-Specific PRACH Configuration Tables: Create new PRACH configuration tables specifically designed for SBFD symbols / slots, allowing the correct alignment of msgA RO with SBFD time domain resources. These tables would account for the UL sub-band within the SBFD slots, ensuring compatibility with full-duplex operation.
[0102] Further Issue: Limitations of Single msgA-PRACH Configuration Index for SBFD and Non-SBFD Symbols / Slots:
[0103] When only one configuration is used to configure the msgA RACH occasion across both SBFD and non-SBFD symbols / slots, the current msgA-PRACH configuration index presents significant limitations. Specifically, the single msgA-PRACH configuration index is insufficient to indicate the time domain parameters (e.g., subframe number, slot number, duration, etc. ) of the msgA RO across both SBFD and non-SBFD symbols / slots due to the following reasons:
[0104] Existing msgA-PRACH Index Designed for UL Frames / Slots: The existing msgA-PRACH configuration index is designed to indicate the time domain location (e.g., frames, slots, symbols) for the Random Access Channel (RACH) occasion in uplink (UL) frames, slots, and symbols. It works well for conventional TDD, where the uplink and downlink resources are divided in separate time slots. However, when trying to apply this single configuration to both SBFD and non-SBFD symbols / slots, the index becomes inadequate. This is because SBFD symbols / slots are configured differently, with UL subbands embedded in full-duplex slots, which differ from the traditional UL-only slots in non-SBFD symbols / slots.
[0105] SBFD Symbols / Slots Require Different Time Domain Resource Indications: In SBFD symbols / slots, the UL subband coexists with downlink transmissions (in the same symbol / slot) , requiring a more complex indication of time domain resources than traditional UL symbols / slots. The current msgA-PRACH index is not designed to handle this complexity. It is built around the assumption that RACH occasions can be located in clear UL time slots, which is not the case in SBFD configurations.
[0106] Inability to Indicate RACH Location in Both SBFD and Non-SBFD Symbols / Slots: A single msgA-PRACH configuration index cannot simultaneously indicate the correct RACH location for both SBFD and non-SBFD symbols / slots because the way time domain resources are allocated in each type of symbol differs significantly.
[0107] In non-SBFD symbols / slots, the UL resources are typically allocated in clear time slots, while in SBFD symbols / slots, the UL and DL transmissions share the same time slots, with UL being allocated in subbands. As a result, the index cannot effectively define the RACH time domain resources for both symbol types using a single configuration.
[0108] Need for Separate Configuration Indexes: Further study is required to explore whether separate msgA-PRACH configuration indexes can be introduced for SBFD and non-SBFD symbols / slots. This would allow for distinct time domain parameter indications for RACH occasions in both symbol types, ensuring proper alignment with their respective UL / DL structures.
[0109] To address these challenges, the following enhancements to the specification are proposed:
[0110] Separate PRACH Configuration Index for SBFD Symbols / Slots: Introduce a separate PRACH configuration index specifically designed for SBFD symbols / slots, allowing for the correct allocation of time domain resources for msgA-RO in SBFD symbols / slots without conflicting with the resources used for non-SBFD symbols / slots.
[0111] Issue 1-3: Prioritization Between Additional msgA RO / PO and Legacy msgA RO / PO for SBFD-Aware UEs:
[0112] When msgA is configured for SBFD-aware UEs in both SBFD and non-SBFD symbols / slots, it becomes critical to establish a prioritization mechanism that guides the UEs in selecting between msgA opportunities in SBFD symbols / slots or non-SBFD symbols / slots. Without such a prioritization, SBFD-aware UEs may default to selecting msgA RO and PO in non-SBFD symbols / slots, leading to increased competition and potential collisions with legacy UEs that are also accessing msgA RO and PO in non-SBFD symbols / slots. This issue creates several challenges:
[0113] If SBFD-aware UEs consistently choose msgA RO and PO in non-SBFD symbols / slots, it could lead to a situation where both SBFD-aware UEs and legacy UEs compete for the same resources in the non-SBFD symbols / slots. This increases the risk of collisions during initial or random access, as multiple UEs might attempt to access the same msgA RO and PO simultaneously in non-SBFD symbols / slots.
[0114] Without a proper prioritization mechanism, SBFD-aware UEs might ignore or underutilize the msgA opportunities in SBFD symbols / slots. This would undermine the benefits of SBFD operations, such as increased spectral efficiency and reduced latency through simultaneous UL and DL transmissions.
[0115] The prioritization mechanism should also provide a fallback option, allowing UEs to switch to non-SBFD symbols / slots if the SBFD symbols / slots are unavailable or if the UE experiences poor performance (e.g., excessive interference or low signal quality) in SBFD symbols / slots.
[0116] To address these issues, a prioritization mechanism should be implemented for SBFD-aware UEs, guiding them to select the appropriate msgA RO and PO while minimizing collisions and ensuring efficient use of resources.
[0117] The system can assign a higher priority to msgA RO and PO in SBFD symbols / slots. This ensures that SBFD-aware UEs are directed to utilize the SBFD resources first, leveraging the benefits of full-duplex operation. Only when the SBFD resources are unavailable or unsuitable should the UEs fallback to non-SBFD symbols / slots. This prioritization helps distribute the access load more evenly across both symbol types, preventing congestion in non-SBFD symbols / slots.
[0118] Fallback mechanisms should be based on performance metrics such as signal quality, interference levels, and availability of SBFD resources. If the SBFD symbols / slots experience poor performance or are temporarily unavailable, the UE can switch to the legacy msgA in non-SBFD symbols / slots. This fallback system ensures that UEs are not locked into using SBFD symbols / slots if they are experiencing adverse conditions, while still prioritizing the use of SBFD when conditions are optimal.
[0119] When SBFD-aware UEs initiate a random or initial access attempt, they first check the availability and quality of msgA RO and PO in SBFD symbols / slots. If the conditions are favorable, the UE selects these resources.
[0120] If the SBFD resources are either unavailable or the UE experiences poor performance (e.g., high interference, low signal quality) , the UE falls back to the msgA RO and PO in non-SBFD symbols / slots.
[0121] The prioritization mechanism also ensures that the number of SBFD-aware UEs selecting msgA RO and PO in non-SBFD symbols / slots is minimized, reducing the likelihood of collisions with legacy UEs that are restricted to non-SBFD symbols / slots.
[0122] The gNB (Next Generation Node B) must signal the prioritization rules to SBFD-aware UEs, indicating when and how they should select between msgA resources in SBFD and non-SBFD symbols / slots. This could be part of the RRC (Radio Resource Control) configuration for the UEs. The system needs to continuously monitor the performance of SBFD symbols / slots (e.g., signal strength, interference) to ensure that UEs can make informed decisions when selecting msgA RO and PO.
[0123] Legacy UEs should remain unaffected by these prioritization mechanisms and should continue to operate under their existing configurations, selecting msgA RO and PO in non-SBFD symbols / slots without interference from SBFD-aware UEs.
[0124] A prioritization mechanism is essential to ensure that SBFD-aware UEs make optimal use of SBFD symbols / slots while avoiding collisions with legacy UEs in non-SBFD symbols / slots. By guiding UEs to prioritize msgA opportunities in SBFD symbols / slots when available and falling back to non-SBFD symbols / slots only when necessary, the system can improve spectral efficiency, reduce the risk of collisions, and ensure balanced resource utilization across the network.
[0125] Problem #2: 4-Step RACH in SBFD Symbols / Slots:
[0126] Issue 1-1: UL Power Control of PRACH Occasion (msg1) in SBFD and Non-SBFD Symbols / Slots:
[0127] In the 4-step Random Access Channel (RACH) procedure, the uplink (UL) power control for the PRACH occasion (msg1) differs between SBFD symbols / slots and non-SBFD symbols / slots due to varying interference levels and antenna configurations. The SBFD symbols / slots typically experience higher interference levels since they involve simultaneous UL and DL transmissions. As a result, higher transmission power may be needed in SBFD symbols / slots to overcome this interference.
[0128] Using a single UL power control configuration (referred to as Option 1) for msg1 Random Access Occasions (ROs) in both SBFD and non-SBFD symbols / slots presents challenges because the power control requirements for these two types of symbols / slots are significantly different. This disclosure explores the need for configuring separate UL power control settings within a single configuration to address the specific requirements for msg1 ROs in SBFD symbols / slots.
[0129] Interference Levels in SBFD Symbols / Slots: SBFD symbols / slots experience higher levels of interference due to their full-duplex nature, where UL and DL transmissions occur simultaneously within the same frequency band. This contrasts with non-SBFD symbols / slots, where UL and DL transmissions are separated in time, resulting in less interference. To address this, higher UL transmission power may be required for msg1 ROs in SBFD symbols / slots to ensure reliable communication between the UE and the gNB (Next Generation Node B) .
[0130] The antenna configurations differ between SBFD and non-SBFD symbols / slots, with SBFD symbols / slots requiring more complex antenna arrangements to handle simultaneous transmissions. This necessitates distinct power control mechanisms to optimize the performance in SBFD symbols / slots, which further complicates the use of a single configuration for both types of symbols / slots.
[0131] When only a single configuration is used for UL power control across both SBFD and non-SBFD symbols / slots, it becomes difficult to adjust the power settings independently for msg1 ROs in these two types of symbols / slots. This could lead to suboptimal performance, such as insufficient power in SBFD symbols / slots or unnecessary power expenditure in non-SBFD symbols / slots.
[0132] Separate UL Power Control Configurations within a Single Configuration: To address these challenges, this disclosure proposes configuring separate UL power control settings for msg1 ROs in SBFD and non-SBFD symbols / slots, while maintaining the simplicity of a single overall configuration. The system can be designed to apply distinct power control adjustments based on the type of symbol in which the msg1 RO occurs.
[0133] For msg1 ROs in SBFD symbols / slots, the system should allow for higher UL transmission power to overcome the higher interference levels. This can be achieved by introducing separate power control parameters, such as Preamble Received Target Power and DeltaPreamble, specific to SBFD symbols / slots. These parameters would be dynamically adjusted to account for the real-time interference and antenna configuration in SBFD symbols / slots, ensuring that the UL transmission power is sufficient to maintain reliable communication during the msg1 RO.
[0134] For an SBFD-aware UE engaged in a 4-step RACH procedure, the gNB configures msg1 ROs in both SBFD and non-SBFD symbols / slots. When the UE initiates the PRACH transmission in an SBFD symbol, it applies a higher Preamble Received Target Power based on the additional interference levels expected in the SBFD environment. If the msg1 RO occurs in a non-SBFD symbol, the UE applies the traditional power control parameters, conserving power while maintaining reliable communication. This dynamic and adaptive approach ensures that the UL power control is optimized for both symbol types, improving communication reliability in SBFD symbols / slots without wasting power in non-SBFD symbols / slots.
[0135] Configuring separate UL power control settings for msg1 ROs in SBFD and non-SBFD symbols / slots is essential to address the differing interference levels and antenna configurations in these two types of symbols / slots. By maintaining a unified configuration framework while allowing dynamic selection of power control parameters based on the symbol type, this approach ensures optimal performance during the 4-step RACH procedure in 5G NR systems that support both SBFD and non-SBFD operations. Further studies are required to fine-tune the specific parameters and signaling mechanisms needed to implement this solution effectively.
[0136] Some embodiments of the present disclosure present innovations aimed at improving the efficiency of 2-step Random Access Channel (RACH) procedures in SBFD symbols / slots. The main inventions proposed include two different configuration options for setting up msgA RO and Physical Uplink Shared Channel Occasion (PO) in SBFD and non-SBFD symbols / slots, as well as separate uplink (UL) power control mechanisms.
[0137] 1. Configuration Options for 2-Step RACH in SBFD Symbols / Slots:
[0138] Option 1: Single Configuration for Both SBFD and Non-SBFD Symbols / Slots:
[0139] This option uses a single configuration to set up both the additional or new msgA RO and PO in SBFD symbols / slots and the legacy msgA RO and PO in non-SBFD symbols / slots. The single configuration handles the power control and resource allocation for both SBFD and non-SBFD symbols / slots within a unified framework, simplifying system management but requiring adaptive mechanisms for varying interference and antenna configurations between the two types of symbols / slots.
[0140] Option 2: Separate Configurations for SBFD and Non-SBFD Symbols / Slots:
[0141] This option introduces two separate configurations: one for configuring the 2-step RACH (msgA RO and PO) in SBFD symbols / slots, and another using the legacy configuration for the legacy msgA RO and PO in non-SBFD symbols / slots. This method allows for more precise control and flexibility, ensuring that the unique characteristics of SBFD symbols / slots (e.g., simultaneous DL / UL transmissions and higher interference levels) are fully accounted for in the configuration process.
[0142] 2. Separate UL Power Control for SBFD and Non-SBFD Symbols / Slots:
[0143] Separate UL Power Control for msgA RO and PO in SBFD Symbols / Slots: Some embodiments of the present disclosure propose separate UL power control mechanisms for the additional or new msgA RO and PO in SBFD symbols / slots, relative to the legacy msgA RO and PO in non-SBFD symbols / slots. This differentiation is necessary due to the varying interference environments and antenna configurations in SBFD versus non-SBFD symbols / slots. The separate power control allows for higher transmission power in SBFD symbols / slots to overcome interference and ensure reliable communication.
[0144] Separate UL Power Control for RACH Configuration (msg1) in SBFD Symbols / Slots: Some embodiments of the present disclosure further propose separate UL power control for the msg1 RACH occasion in SBFD symbols / slots, relative to RACH in non-SBFD symbols / slots. The power control for msg1 in SBFD symbols / slots would be adapted to the higher interference levels present in full-duplex transmissions, ensuring more effective initial access while maintaining lower power settings for msg1 in non-SBFD symbols / slots, where interference is lower.
[0145] 3. Time Domain Resource Indication for msgA RO and PO in SBFD Symbols / Slots:
[0146] Some embodiments of the present disclosure proposes enhancements to the time domain resource indication for msgA RO and PO in SBFD symbols / slots. Given that existing RACH configuration tables in the 3GPP specification are designed for traditional TDD slots, these tables are not suitable for SBFD operations, which involve simultaneous uplink and downlink transmissions. Some embodiments of the present disclosure introduce new mechanisms for indicating the time domain resources of msgA RO and PO specifically within SBFD symbols / slots, ensuring that these resources are properly allocated without conflict with other network operations.
[0147] 4. Prioritization Mechanism for msgA RO and PO in SBFD and Non-SBFD Symbols / Slots:
[0148] A prioritization mechanism is proposed for SBFD-aware UEs to select between msgA RO and PO in SBFD symbols / slots and non-SBFD symbols / slots. The mechanism ensures that UEs prioritize msgA RO and PO in SBFD symbols / slots when available, leveraging the full-duplex capabilities of SBFD symbols / slots for more efficient resource utilization. If SBFD symbols / slots are unavailable or provide poor performance, the prioritization mechanism allows the UEs to fall back to msgA RO and PO in non-SBFD symbols / slots, ensuring continued network access with minimal interruptions.
[0149] Some embodiments of the present disclosure offer flexible configuration options for 2-step RACH in SBFD symbols / slots, separate UL power control for msgA RO and PO in both SBFD and non-SBFD symbols / slots, and an improved time domain resource indication mechanism for SBFD operations. Additionally, the proposed prioritization mechanism ensures efficient resource selection between SBFD and non-SBFD symbols / slots, improving overall network performance, reducing interference, and enhancing access reliability for SBFD-aware UEs. This invention is designed to optimize 5G NR systems, specifically in networks supporting SBFD and non-SBFD symbol configurations.
[0150] 1. Separate UL Power Control for msgA in SBFD Symbols / Slots:
[0151] Effect: Overcoming Interference in SBFD Symbols / Slots: By introducing separate UL power control mechanisms for the additional msgA (RO and PO) in SBFD symbols / slots relative to msgA (RO and PO) in non-SBFD symbols / slots, SBFD-aware UEs can mitigate the interference commonly encountered in SBFD symbols / slots. This is particularly important for ensuring reliable initial / random access when dealing with higher interference levels in full-duplex environments, where simultaneous uplink (UL) and downlink (DL) transmissions occur. Similarly, separate UL power control for the additional RACH configuration (msg1) in SBFD symbols / slots helps UEs achieve more stable access, overcoming interference in SBFD slots and ensuring that msg1 transmissions are reliably received by the gNB.
[0152] 2. Time Domain Resource Indication for SBFD Symbols / Slots:
[0153] Effect: Correct Resource Allocation and Avoidance of Conflicts: By including a dedicated time domain resource indication for msgA RO and PO in SBFD symbols / slots, the system ensures that resources are properly allocated, preventing conflicts or overriding of msgA resources between SBFD and non-SBFD symbols / slots. This prevents situations where both SBFD and non-SBFD symbols / slots would be competing for the same resources, which could cause access collisions or performance degradation. Clear indication of time domain resources allows for efficient use of spectrum in both symbol types, enhancing system reliability and performance.
[0154] 3. Prioritization Mechanism for Resource Selection:
[0155] Effect: Optimized Resource Selection and Fall-Back Mechanism: The prioritization mechanism for selecting between the additional / new msgA RO and PO in SBFD symbols / slots ensures that the most appropriate resources are chosen based on current network conditions. UEs are guided to select msgA RO and PO in SBFD symbols / slots when performance is favorable, leveraging the full-duplex capabilities and spectral efficiency of SBFD symbols / slots. If network conditions degrade or if SBFD resources are unavailable, the prioritization mechanism allows UEs to fall back to msgA RO and PO in non-SBFD symbols / slots, ensuring that UEs can continue to access the network reliably without performance interruptions. This dynamic fallback ensures that UEs maintain robust network connectivity even in suboptimal conditions.
[0156] The effects outlined in some embodiments of the present disclosure highlight significant improvements in handling initial / random access for SBFD-aware UEs. By optimizing UL power control, ensuring proper time domain resource allocation, and introducing a prioritization mechanism, the system can deliver more reliable access, minimize interference, and dynamically select the most suitable resources in SBFD and non-SBFD symbols / slots. This enhances overall network performance, especially in challenging full-duplex environments, while ensuring efficient resource utilization and access reliability.
[0157] Some embodiments of the disclosure present two distinct solutions to enhance uplink (UL) power control, time domain resource indication, and prioritization mechanisms for SBFD-aware UEs in 5G NR systems. These solutions are designed to optimize the performance of msgA RO and PO and msg1 PRACH in SBFD symbols / slots, addressing the challenges posed by the higher interference levels and full-duplex nature of SBFD operations.
[0158] Solution 1: Separate UL Power Control, Time Domain Resource Indication, and Prioritization for msgA RO and PO in SBFD Symbols / Slots: The first solution is focused on the configuration and determination of: Separate UL power control for the additional / new msgA RO and PO in SBFD symbols / slots relative to the legacy msgA RO and PO in non-SBFD symbols / slots. Time domain resources indication for msgA RO and PO in SBFD symbols / slots, ensuring that resources are allocated correctly and do not conflict with msgA RO and PO in non-SBFD symbols / slots. A prioritization mechanism that guides SBFD-aware UEs in selecting between msgA resources in SBFD symbols / slots and non-SBFD symbols / slots, based on network conditions and performance. This ensures that the most appropriate resources are used and allows UEs to fall back to non-SBFD symbols / slots if SBFD performance is suboptimal. The high-level solution for this idea is discussed in detail in some embodiments of the present disclosure.
[0159] Solution 2: Separate UL Power Control for msg1 PRACH in SBFD Symbols / Slots: The second solution focuses on the configuration and determination of: Separate UL power control for the additional msg1 PRACH configuration in SBFD symbols / slots. This is necessary due to the higher interference levels and full-duplex transmissions in SBFD symbols / slots, which require different power control strategies compared to the legacy PRACH in non-SBFD symbols / slots. The detailed explanation for this solution is provided in some embodiments of the present disclosure.
[0160] Both solutions aim to improve the effectiveness and reliability of UL transmissions in SBFD symbols / slots by tailoring power control mechanisms, ensuring accurate resource allocation, and enabling a dynamic prioritization process. These innovations ensure optimal performance during random and initial access in SBFD and non-SBFD environments in 5G NR systems.
[0161] Some embodiments of the present disclosure focus on the 2-step Random Access Channel (RACH) procedure in SBFD symbols / slots and propose two configuration options for configuring the additional and legacy msgA (including RO and Physical Uplink Shared Channel Occasion (PO) ) for SBFD-aware UEs. It assumes that SBFD operation within TDD DL / Flexible symbols / slots is already configured to UEs in either RRC connected and / or RRC idle / inactive states. The overall solution and functioning of the 2-step RACH in SBFD symbols are illustrated in FIG. 4A. To configure the additional msgA RO and PO in SBFD symbols, along with the legacy msgA RO and PO in non-SBFD symbols, some embodiments of the present disclosure propose two options: Configuration 1 and Configuration 2, as depicted in FIG. 4A.
[0162] Configuration 1: Single Configuration for Both SBFD and Non-SBFD Symbols / slots: In configuration 1, only a single configuration is used to configure both additional msgA RO and PO in SBFD symbols / slots, and legacy msgA RO and PO in non-SBFD symbols / slots. This approach simplifies system management by using one configuration to handle both SBFD and non-SBFD symbols / slots. However, it requires adaptive mechanisms to ensure that UL power control, interference management, and time domain resource allocation can be tailored separately for SBFD and non-SBFD symbols / slots.
[0163] Configuration 2: Separate Configurations for SBFD and Non-SBFD Symbols / Slots: In Configuration 2, two separate configurations are employed: One configuration is used to configure the additional msgA RO and PO in SBFD symbols / slots, and a legacy configuration is used to configure the legacy msgA RO and PO in non-SBFD symbols / slots. This method allows for more granular control and flexibility, as each configuration can be optimized based on the specific characteristics of SBFD symbols / slots (full-duplex with simultaneous UL / DL transmissions) and non-SBFD symbols / slots (traditional Time Division Duplex with separate UL / DL slots) .
[0164] The illustration in FIG. 4A shows the process of configuring msgA for SBFD-aware UEs. The example demonstrates the following steps: Step 1: SBFD operation is pre-configured for UEs in RRC connected or RRC idle / inactive states. Step 2: The msgA RO and PO configurations for SBFD symbols / slots and non-SBFD symbols / slots are set up, using either Configuration 1 (single configuration) or Configuration 2 (separate configurations) . Step 3 and beyond: The 2-step RACH procedure executes, where UEs follow the selected configuration to perform random or initial access in either SBFD or non-SBFD symbols / slots based on the resource availability and network conditions. Some embodiments of the present disclosure propose two configuration options to configure msgA (RO and PO) for SBFD-aware UEs, depending on whether the system uses a single or separate configuration for SBFD and non-SBFD symbols / slots. Both approaches aim to ensure efficient access, proper resource allocation, and optimized uplink power control for SBFD-aware UEs during the 2-step RACH procedure.
[0165] Some embodiments of the present disclosure present the configuration and UL power control mechanisms for SBFD-aware UEs performing 2-step RACH in SBFD symbols / slots within TDD DL / Flexible symbols / slots. The system can use either a single configuration or two separate configurations for managing msgA RO and PO across SBFD and non-SBFD symbols / slots. These configurations, along with the parameters required to adjust the UL power control, are illustrated in FIG. 4B.
[0166] Step 1: Configuration of SBFD Operation in TDD DL / Flexible Symbols / Slots: The base station (gNB) performs a configuration of SBFD operation within TDD DL or Flexible symbols / slots for UEs in RRC connected and / or RRC idle / inactive states. This enables SBFD-aware UEs to perform simultaneous UL and DL transmissions in SBFD symbols / slots.
[0167] Step 2: Configuration of 2-Step RACH for SBFD-Aware UEs: The base station configures the 2-step RACH for SBFD-aware UEs. This configuration defines how msgA (RO and PO) is handled across both SBFD symbols / slots and non-SBFD symbols / slots. Configuration 1 (Single Configuration) : A single configuration is used to manage both the additional msgA RO and PO in SBFD symbols / slots and the legacy msgA RO and PO in non-SBFD symbols / slots. This unified approach simplifies configuration but requires adaptive mechanisms for handling power control and interference across both types of symbols / slots. Configuration 2 (Separate Configurations) : Two separate configurations are employed: One configuration is used for the additional msgA RO and PO in SBFD symbols / slots. A separate configuration is used for the legacy msgA RO and PO in non-SBFD symbols / slots. This approach provides more granular control over the configuration for each type of symbol / slot, allowing for optimized handling of the differences between SBFD and non-SBFD symbols / slots.
[0168] Step 3: UL Power Control Adjustment for msgA RO and PO: The base station configures the parameters to adjust the UL power control for msgA RO and PO in SBFD symbols / slots relative to that in non-SBFD symbols / slots. This accounts for the varying levels of interference and antenna configurations between the two symbol types: In SBFD symbols / slots, higher levels of interference due to simultaneous UL / DL transmissions may require UEs to transmit at higher power levels to ensure successful communication. In non-SBFD symbols / slots, traditional TDD configurations with separate UL / DL slots typically experience lower interference, allowing for lower transmission power. Alternatively, the base station can configure separate UL power control settings for the msgA RO and PO in the additional 2-step RACH configuration. This ensures that the UL power control for SBFD symbols / slots can be finely tuned independently of the legacy configuration in non-SBFD symbols / slots.
[0169] The system configures SBFD-aware UEs to perform 2-step RACH through either a single configuration for both SBFD and non-SBFD symbols / slots or through two separate configurations for each symbol type. The UL power control parameters are adjusted to ensure that msgA RO and PO transmissions in SBFD symbols / slots can overcome interference, while msgA RO and PO in non-SBFD symbols / slots use a separate power control regime optimized for lower-interference environments. The proposed approach in some embodiments of the present disclosure enables SBFD-aware UEs to effectively perform 2-step RACH using either a unified or separate configuration for SBFD and non-SBFD symbols / slots. The solution includes flexible mechanisms for UL power control, allowing UEs to dynamically adjust their transmission power based on the specific symbol type, thereby improving communication reliability and network efficiency in 5G NR systems.
[0170] FIG. 4C is a flowchart illustrating wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a base station according to an embodiment of the present disclosure. The wireless communication method executed by the base station includes an operation 401C, performing a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to SBFD aware user equipment (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and an operation 402C, configuring at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots. In some embodiments, the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.
[0171] FIG. 4D is a flowchart illustrating wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a user equipment (UE) according to an embodiment of the present disclosure. The wireless communication method executed by the UE includes an operation 401D, receiving a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to from a base station, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and an operation 402D, being configured with at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots. In some embodiments, the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.
[0172] Some embodiments of the present disclosure outline several innovations associated with the 2-step Random Access Channel (RACH) procedure in SBFD symbols / slots and / or non-SBFD symbols / slots, using either Configuration 1 or Configuration 2. The points are summarized below, with references to the detailed embodiments for further elaboration.
[0173] 1. Configuration 1: Unified Configuration for SBFD and Non-SBFD Symbols / Slots: In Configuration 1, a single configuration is used to handle both SBFD symbols / slots and non-SBFD symbols / slots for the msgA RO and PO. The following innovations are introduced: UL Power Control for Additional / New msgA RO in SBFD Symbols / Slots: Several options for adjusting the uplink (UL) power control of the additional or new msgA RO in SBFD symbols / slots are proposed. These options ensure that the power levels are adequate to overcome the interference specific to SBFD symbols / slots. Refer to Embodiment #1, for a comprehensive explanation of the proposed options. UL Power Control for Additional / New msgA PO in SBFD Symbols / Slots: Multiple options for adjusting the UL power control for the additional msgA PO in SBFD symbols / slots are also proposed, allowing the system to fine-tune the power control based on the unique characteristics of SBFD transmissions. See Embodiment #1, for further details on the proposed options for msgA PO.
[0174] 2. Configuration 2: Separate Configurations for SBFD and Non-SBFD Symbols / Slots: In Configuration 2, separate configurations are used for SBFD and non-SBFD symbols / slots, which provides more flexibility and granularity: Separate Higher Layer Configuration for SBFD Symbols / Slots: A separate higher layer configuration is proposed for the additional / new msgA (including RO and PO) in SBFD symbols / slots. This includes separate UL power control for the additional msgA RO and PO, ensuring that the power control is tailored specifically for the interference levels and transmission requirements of SBFD symbols / slots. See Embodiment #2, for a detailed discussion on the higher layer configuration options.
[0175] 3. Time Domain Location of Additional / New msgA RO and PO: For both Configuration 1 and Configuration 2, methods for determining the time domain location of msgA RO and PO are introduced: Both explicit indication and implicit derivation of the time domain location of the additional / new msgA RO and PO in SBFD symbols / slots are proposed. These approaches help ensure accurate scheduling and resource allocation for SBFD-aware UEs. For a comprehensive breakdown of these mechanisms, refer to Embodiment #3.
[0176] 4. Prioritization Mechanism for SBFD and Non-SBFD Symbols / Slots: A prioritization mechanism is introduced to enable SBFD-aware UEs to make decisions on whether to use the additional / new msgA in SBFD symbols / slots or the legacy msgA in non-SBFD symbols / slots: This mechanism helps UEs prioritize between SBFD and non-SBFD resources based on network conditions, ensuring optimal performance and access efficiency. For an in-depth explanation of the prioritization mechanisms, refer to Embodiment #4.
[0177] The innovations in some embodiments of the present disclosure provide significant enhancements to the 2-step RACH process for SBFD-aware UEs by addressing the challenges of UL power control, time domain resource allocation, and prioritization between SBFD and non-SBFD symbols / slots. The combination of Configuration 1 and Configuration 2 offers flexibility for managing these processes in 5G NR systems, while the various embodiments provide detailed solutions for overcoming interference and ensuring efficient resource utilization.
[0178] Embodiment #1: Separate UL Power Control for msgA RO &PO in SBFD Symbols / Slots (In Configuration 1) :
[0179] Single Configuration Approach: Configuration 1 employs a single configuration to manage both: The additional / new msgA RO and PO in SBFD symbols / slots, and the legacy msgA RO and PO in non-SBFD symbols / slots. This single configuration is defined through a common signaling mechanism such as MsgA- ConfigCommon, which provides a unified framework for configuring the msgA across different symbol types (SBFD and non-SBFD) .
[0180] UL Power Control in SBFD Symbols / Slots: Need for Separate Power Control. The SBFD symbols / slots experience higher levels of interference due to simultaneous UL and DL transmissions in the same symbol / slot, necessitating the need for separate UL power control mechanisms to ensure reliable communication. While non-SBFD symbols / slots typically follow a conventional TDD setup with less interference in UL slots, SBFD symbols / slots require specific adjustments to the UL transmission power to overcome the interference challenges.
[0181] Adjustments for msgA RO in SBFD Symbols / Slots: The UL power control for the msgA RO in SBFD symbols / slots is designed to dynamically adjust the Preamble Received Target Power and other power parameters based on real-time interference conditions in SBFD symbols / slots. The goal is to ensure that the msgA RO has enough transmission power to be successfully received by the gNB (Next Generation Node B) without causing excessive power consumption or interference to other UEs.
[0182] Adjustments for msgA PO in SBFD Symbols / Slots: Similarly, the UL power control for the msgA PO in SBFD symbols / slots can be configured to account for the simultaneous UL and DL transmission environment. This involves adjusting the P0-PUSCH-alphaset or other relevant power control parameters to ensure stable PUSCH transmission in SBFD symbols / slots. The power control mechanism ensures that msgA PO in SBFD symbols / slots operates efficiently without causing collisions or interference with ongoing DL transmissions.
[0183] Power Control Parameters: MsgA-ConfigCommon. The MsgA-ConfigCommon parameter serves as the primary configuration element in Configuration 1, used to define both the additional msgA in SBFD symbols / slots and the legacy msgA in non-SBFD symbols / slots. It includes settings for UL power control, specifying how the power levels are adjusted in different symbol types. The system dynamically determines whether msgA RO and PO are occurring in SBFD or non-SBFD symbols / slots and applies the appropriate power control settings accordingly.
[0184] Benefits of Separate UL Power Control in Configuration 1:
[0185] Dynamic Interference Management: By utilizing separate UL power control settings for SBFD symbols / slots, the system can more effectively manage the high interference levels associated with full-duplex operation, ensuring reliable initial / random access in SBFD symbols / slots.
[0186] Unified Configuration Simplicity: Despite the need for different power control mechanisms between SBFD and non-SBFD symbols / slots, Configuration 1 provides a unified configuration that simplifies system management by using a single framework for msgA configuration. This approach reduces the complexity of maintaining multiple configurations while allowing for dynamic power adjustments based on the symbol type.
[0187] This embodiment describes the implementation of separate UL power control for the additional / new msgA RO and PO in SBFD symbols / slots within the context of Configuration 1. By dynamically adjusting the power control parameters based on the interference characteristics of SBFD symbols / slots, the system ensures efficient and reliable access, even in environments with simultaneous UL and DL transmissions. The use of MsgA-ConfigCommon in a single configuration framework allows for a streamlined yet flexible approach to managing the complexities of SBFD and non-SBFD symbols / slots.
[0188] Embodiment #1-1 Separate UL power control for msgA RO in SBFD symbols / slots:
[0189] In some embodiments, in the first configuration, the at least one UL power control parameter comprises a preamble received target power, a path loss, and / or a power offset for the first msgA ROs and POs in the SBFD symbols / slots relative to the second msgA ROs and / or POs in the non-SBFD symbols / slots.
[0190] According to the current specification [TS38.213] the UL power control parameters of msgA RO can be determined according to the following equation: PPRACH, b, f, c (i) =min {PCMAX, f, c (i) , PPRACH, target, f, c+PLb, f, c} [dBm] , where the PCMAX, f, c (i) is the UE configured maximum output power, the PPRACHtarget, f, c is configured according to the parameters such as msgA-preambleReceivedTargetPower and msgA-DeltaPreamble or preambleReceivedTargetPower and DeltaPreamble. However, in order to adjust the UL power control of the msgA RO located in SBFD symbols / slots this embodiment of the present disclosure proposes the following alternative options.
[0191] Alt Option 1: Configure a power offset for UL power control of msgA RO in SBFD symbols / slots:
[0192] In some embodiments, in the first configuration, the at least one UL power control parameter comprises at least one parameter used to adjust the UL power control of the first msgA ROs and POs in the SBFD symbols / slots. Some embodiments outline the design of separate uplink (UL) power control for the additional / new msgA, which includes both the RO and the PUSCH Occasion (PO) located in SBFD symbols / slots. The configuration for these additional msgA components is implemented through Configuration 1, which utilizes a unified approach.
[0193] In this option, Configuration 1 is utilized, where the UE is configured either with either msgA-preambleReceivedTargetPower or preambleReceivedTargetPower for the non-SBFD symbols / slots. This option proposes to introduce a power offset value relative to the preamble Received Target Power in the non-SBFD symbols / slots to adjust the preamble Received Target Power for msgA RO in SBFD symbols / slots. In other words to adjust the PPRACHtarget, f, c of the msgA RO in SBFD symbols / slots. The SBFD-aware UE can use the following equation to determine the preamble Received Target Power of the msgA RO in SBFD symbols / slots relative to non-SBFD symbols / slots: Preamble Received Target Power in SBFD symbols / slots = Preamble Received Target Power in non-SBFD symbols / slots +Power Offset. Once the UE has corrected values of the preamble received target power in SBFD symbols / slots, the UE can determine / calculate the UL power control of the msgA RO according to the interference level in the SBFD symbols / slots as explained in example below.
[0194] For instance, we assume the following parameter are configured to UE by gNB. Preamble received target power = -100 dbm. PL (path loss) = 20 dbm. Power offset = -50 dbm. In order to determine the UL power control of msgA in SBFD symbols / slots, the UE first find the preamble received target power in SBFD symbols / slots by proposed equation: Preamble Received Target Power in SBFD symbols / slots = Preamble Received Target Power in non-SBFD symbols / slots +Power Offset, e.g., Preamble Received Target Power in SBFD symbols / slots = -100 dbm + (-50 dbm) = -150 dbm. The UE then uses the general equation as given below to calculate the msgA RO UL power control: PPRACH, b, f, c (i) =min {PCMAX, f, c (i) , PPRACH, target, f, c+PLb, f, c} [dBm] , e.g., PPRACH target f, c, = -150dbm + 20 dbm = -130 dbm which is UL power control of msgA RO in SBFD symbols / slots. This approach ensures that the UE can appropriately adjust its UL power for transmission in msgA RACH in SBFD symbols / slots.
[0195] The configuration of power offset for msgA RO is shown in the IE example below.
[0196] Alt Option 2: Configure a scaling factor Beta (β) :
[0197] In some embodiments, in the first configuration, the at least one UL power control parameter comprises a scaling factor Beta (β) , wherein the scaling factor Beta (β) scales a msgA preamble received target power to adjust the UL power control of the first msgA ROs and / or POs in the SBFD symbols / slots. In some embodiments, the scaling factor Beta (β) is determined based on the msgA preamble received target power for the first msgA ROs and / or POs in the SBFD symbols / slots and a msgA preamble received target power for the second msgA ROs and / or POs in the non-SBFD symbols / slots. In some embodiments, the scaling factor Beta (β) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots. In some embodiments, the scaling factor Beta (β) is selected from a range of 1.2, 1.4, 1.6, or 1.8.
[0198] In this option, this embodiment of the present disclosure proposes to configure a scaling factor Beta (β) for the SBFD-aware UE to scale the msgA-preambleReceivedTargetPower in SBFD symbols / slots relative to the UL power control of the msgA RO in non-SBFD symbols / slots. This scaling factor Beta (β) can be used to adjust the UL power control of the msgA RO in SBFD symbols / slots, relative to the UL power control of msgA RO in non-SBFD symbols / slots. The UE can calculate the msgA-preambleReceivedTargetPower for UL power control in SBFD symbols / slots using the following equation: msgA.preambleReceivedTargetPower (SBFD symbols) = msgA.preambleReceivedTargetPower (non. SBFD) x β, where the scaling factor Beta (β) may have different values, determined based on the following alternatives:
[0199] Alt1: In this alternative, the following equation is proposed to find the scaling factor Beta:
[0200] Alt2: The scaling factor Beta can be configured by the UE according to the cross link interference (CLI) measured in the SBFD symbols / slots. For instance, Beta can be in the range of {1.2, 1.4, 1.6, 1.8} .
[0201] The configuration example of the scaling factor Beta value is given below.
[0202] Embodiment #1-2 Separate UL power control for MSGA PO in SBFD symbols / slots:
[0203] According to current specification TS 38.213, the UL power control parameters of msgA PUSCH occasion in can be determined based on the following equation:
[0204] [dBm] , where the P0-PUSCH-alphaset is configured to the UE. However, if P0-PUSCH-alphaset is not provided then the UE can use the msgA-preambleReceivedTargetPower and msgA-DeltaPreamble which is configured to the UE for the msgA RO as given from the specification 38.213 below.
[0205] To determine the UL power control of the msgA PO in SBFD symbols / slots, where the msgA PO is configured with Configuration 1, this embodiment of the present disclosure considers the two cases mentioned in the current specification. According to the current specification, if P0-PUSCH-alphaset is not provided / configured to the UE, the UE can determine the msgA PO UL power control based on the msgA-preambleReceivedTargetPower, or by preambleReceivedTargetPower if msgA-preambleReceivedTargetPower is not provided and ΔMsgA_PUSCH is provided by msgA-DeltaPreamble or deltaPreamble, or ΔMsgA_PUSCH=ΔPREAMBLE_Msg3 dB if msgA-DeltaPreamble and deltaPreamble are not provided, for carrier f of serving cell c.
[0206] Based on this, this embodiment proposes the UL power control of the msgA PO in SBFD symbols / slots in the following two cases:
[0207] In some embodiments, in the first configuration, the at least one UL power control parameter comprises a parameter of msgA-preamble received target power and / or a parameter of ΔMsgA_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for the UL power control, the parameter of msgA-preamble received target power is used to adjust the UL power control for the first msgA ROs in the SBFD symbols / slots, the parameter of ΔMsgA_PUSCH is determined from a parameter of msgA-delta preamble, and the parameter of msgA-delta preamble is a power offset of msgA physical uplink shared channel (PUSCH) and is used to adjust the UL power control for the first msgA POs in the SBFD symbols / slots. In some embodiments, in the first configuration, when the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset and a closed loop power control for the first msgA POs in the SBFD symbols / slots. In some embodiments, in the first configuration, the at least one UL power control parameter comprises an offset used to adjust the UL power control of the first msgA POs in the SBFD symbols / slots. In some embodiments, the offset comprises power offsets in terms of values for the UEs relative to the UL power control used for second msgA POs in the non-SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the power offset.
[0208] Case A: If P0-PUSCH-aplha set is not provided. In case A, in order to determine the UL power control parameters this embodiment of the present disclosure proposes to re-interpret / enhance the following parameter.
[0209] msgA-preambleReceivedTargetPower: This parameter of the UL power control for msgA PO can be adjusted according to some embodiments to adjust the UL power control of the msgA RO in SBFD symbols.
[0210] ΔMsgA_PUSCH: As the ΔMsgA_PUSCH is determined from the msgA-DeltaPreamble. However according to current specification msgA-DeltaPreamble itself is a Power offset of msgA PUSCH relative to the preamble received target power. Therefore, in this embodiment we prosed to configure a new msgA-DeltaPreamble_x to the SBFD aware UE for the msgA PO in SBFD symbols / slots in order to adjust the UL power control of the msgA PO in SBFD symbols / slots. The configuration example is shown below
[0211] In some embodiments, in the first configuration, the at least one UL power control parameter comprises offset values for the P0-PUSCH-alpha set and a closed-loop power control in the non-SBFD symbols / slots, the offset values for P0, alpha, and a closed-loop index are adjusted individually, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated by mathematically operating the offset values with the values of P0, alpha, and the closed-loop index in the non-SBFD symbols. In some embodiments, in the first configuration, the at least one UL power control parameter comprises a scaling factor to adjust the UL power control of the first msgA POs in SBFD symbols / slots. In some embodiments, the scaling factor is a single scaling factor (sigma σ) configured to adjust the UL power control for the first msgA POs in the SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the single scaling factor (sigma σ) . In some embodiments, the scaling factor is individual scaling factors σ1, σ2, and σ3 configured to the UE to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of the first msgA POs in the SBFD symbols / slots.
[0212] Case B: If P0-PUSCH-Alphaset is provided / Configured:
[0213] According to the current specification, when the P0-PUSCH-alphaset is configured for the UE, it determines UL power control for the MsgA PO using the following equation form current specification [TS 38.213] :
[0214] [dBm] .
[0215] However, this equation, contains the P0, alpha and closed-loop power control parameters, which we assumed is provided / configured to the UE based on UL power control in non-SBFD symbols / slots. To adjust the UL power control for MsgA PO in SBFD symbols / slots, the P0-PUSCH-alphaset (including P0 and alpha) , and the closed loop power control needs to be redefined, reinterpreted, or adjusted for the msgA PO in SBFD symbols / slots. This embodiment of the present disclosure proposes the following alternative options to achieve this.
[0216] Alt Option 1: Configure a new P0-PUSCH-alphaset and closed loop power control for msgA PO in SBFD symbols / slots: In this option, a new P0-PUSCH-alphaset, and closed loop power control is configured specifically for the UL power control parameters of the msgA PO in SBFD symbols / slots. This configuration allows for precise control and adjustment of the UL power for msgA PO in SBFD symbols / slots, and the SBFD aware UE use this set to adjust the UL power control of the msgA PO in the SBFD symbols / slots.
[0217] Alt Option 2: Configure an offset to adjust the UL power control of the msgA PO in SBFD symbols / slots: In this embodiment, the present disclosure proposes configuring a power offset value for the msgA PO in SBFD relative to the UL power control of the msgA in non-SBFD symbols / slots. This power offset value can be utilized to calculate the UL power control of the msgA PO in SBFD symbols / slots. The proposed alternatives are as follows:
[0218] Alt1: In this alternative approach, a power offset can be configured for the UE as a single value relative to the Uplink Power Control (e.g. related to PPUSCH, b, f, c (i, j, q, l) ) relative to the PUSCH UL power control in non-SFBD symbols / slots. The actual value of the Uplink Power Control for the msgA RO can then be calculated based on this configured power offset value. For example, the UL power control of the msgA RO can be determined using the following equation: msgA (PO) UL power control in SBFD =msgA (PO) UL power control (non-SBFD) + power offset value.
[0219] Alt2: In this alternative approach, configure the offset values for the P0-PUSCH-alphaset and closed-loop power control relative to its values in non-SBFD symbols / slots. Based on these offset values, the UE can adjust the P0-PUSCH-alphaset and closed-loop power control in SBFD symbols / slots. For example, the P0-PUSCH-alphaset includes the values of P0 and alpha, which are already configured for the non-SBFD symbols / slots. The offset values can be configured individually for P0, alpha, and the closed-loop index. Using these offset values, the UE can adjust the P0, alpha, and closed-loop power control used for the msgA PO in SBFD symbols / slots. Once the UE has the correct values for P0, alpha (collectively P0-PUSCH-alphaset) and the closed-loop index, it can calculate the actual uplink power control for the msgA PO in SBFD symbols / slots. The equations to calculate P0, alpha, and the closed-loop index for the msgA in SBFD symbols / slots are as follows:
[0220] P0 in SBFD symbols / slots = P0 in non SBFD symbols / slots+ offset value.
[0221] alpha in SBFD symbols / slots = alpha in non SBFD symbols / slots + offset value.
[0222] closed loop power control in SBFD symbols / slots =closed loop power control in non SBFD symbols / slots + offest value.
[0223] Alt Option 3: Configure a scaling factor (sigma σ) to adjust the UL power control of the msgA in SBFD symbols / slots: In this option, this embodiment of the present disclosure proposes configuring a scaling factor (sigma σ) value for the msgA PO in SBFD relative to the UL power control of the msgA in non-SBFD symbols / slots. This scaling factor (sigma) can be used to adjust the UL power control of the msgA PO in SBFD symbols / slots, relative to the msgA in non-SBFD symbols / slots. The following alternatives can be used for the scaling factor to adjust the UL power control of the msgA in SBFD symbols / slots:
[0224] Alt1: A single scaling factor (sigma (σ) ) can be used to adjust the overall UL power control of the msgA PO in SBFD. For instance, the UL Power Control is configured to the UE for the non-SBFD symbols / slots for msgA. The scaling factor can be used according to the following equation: msgA PO UL power control of SBFD symbols / slots= UL power control in non-SBFD symbols x σ. The scaling factor sigma can be defined as given in the following equation:
[0225] Alt 2: In this alternative, the individual scaling factors (sigma (σ1, σ2, σ3) ) can be configure to the SBFD aware UE in order to adjust the value of P0, alpha (P0-PUSCH-alphaset) and closed loop index for msgA in SBFD symbols / slots relative to non-SBFD symbols / slots respectively. Where σ1 is corresponding to the scaling factor of P0, σ1 is corresponding to the scaling factor of alpha, and σ3 is corresponding to the scaling factor of closed loop index. Based on the scaling factors the value of P0, alpha and closed loop index, for msgA in SBFD symbols / slots relative to non-SBFD symbols / slots can be found. Once the UE has the correct values of P0, alpha (collectively P0-PUSCH-alphaset) and closed loop power control, according to the SBFD symbols / slots, the UE can calculate the actual UL power control of the msgA PO in SBFD. The equations which can calculate the P0, alpha, and closed loop power control of the msgA in SBFD symbols / slots are given below:
[0226] msgA P0 in SBFD symbols / slots = P0 msgA in non-SBFD symbols / slots x σ1.
[0227] msgA alpha in SBFD symbols / slots = msgA alpha in non-SBFD symbols / slots x σ2.
[0228] msgA closed loop power in SBFD symbols / slots = msgA closed loop power in non-SBFD symbols / slots x σ3.
[0229] The scaling factors 1, σ2, σ13 can be defined as given in the following equations:
[0230] Embodiment #2: Configuration 2-UL Power Control for msgA RO in SBFD and Non-SBFD Symbols / Slots:
[0231] In some embodiments, the second configuration is two separate configurations comprising one configuration for the first msgA ROs and POs in the SBFD symbols / slots and another configuration for the second msgA ROs and POs in the non-SBFD symbols / slots. In some embodiments, in the second configuration, the one configuration comprises a parameter of msgA-ConfigCommon used to configure the first msgA ROs and POs in the SBFD symbols / slots, and the another configuration comprises a parameter of msgA-ConfigCommon used to configure the second msgA ROs and POs in the non-SBFD symbols / slots. In some embodiments, in the second configuration, the parameters of msgA-ConfigCommon, comprises: the parameter of msgA preamble received target power for the UL power control of the first msgA ROs in the SBFD symbols / slots; and the parameters of msgA Delta preamble, P0, alpha and / or closed loop index for the UL power control of the first msgA POs in the SBFD symbols / slots.
[0232] In Configuration 2, the additional / new msgA (including RO and PUSCH Occasion (PO) ) in SBFD symbols / slots is configured separately for SBFD-aware UEs. This embodiment introduces two distinct configurations for handling msgA across SBFD and non-SBFD symbols / slots, allowing for more granular control over uplink (UL) power control and resource management. The key advantage of this approach is the ability to independently manage UL power for SBFD and non-SBFD symbols / slots, ensuring optimal performance under differing transmission conditions.
[0233] Separate Configurations for SBFD and Non-SBFD Symbols / Slots: In Configuration 2, the msgA RO and PO in SBFD symbols / slots are managed through a separate configuration from those in non-SBFD symbols / slots. This separation allows for the precise tuning of UL power control and resource allocation, tailored to the specific needs of each symbol type. The additional / new msgA (including RO and PO) is configured independently for SBFD-aware UEs, leveraging separate msgA-ConfigCommon configurations at the higher layers of the protocol stack to manage msgA operations in SBFD symbols / slots and non-SBFD symbols / slots.
[0234] msgA-ConfigCommon for SBFD and Non-SBFD Symbols / Slots: The two distinct configurations, both referred to as msgA-ConfigCommon, define how msgA (RO and PO) is configured in SBFD symbols / slots versus non-SBFD symbols / slots. Each configuration includes independent parameters for managing UL power control to address the different interference and antenna configurations found in SBFD and non-SBFD symbols / slots. For instance, the msgA-ConfigCommon for SBFD symbols / slots will focus on overcoming the challenges of full-duplex operation, which involves simultaneous UL and DL transmissions, requiring higher or more dynamically adjusted UL power settings.
[0235] UL Power Control in Configuration 2:
[0236] Separate UL Power Control for SBFD Symbols / Slots: In SBFD symbols / slots, UL transmissions must contend with higher interference levels due to the simultaneous UL and DL transmissions that occur in the same frequency band. Therefore, the msgA-ConfigCommon for SBFD symbols / slots is configured with separate UL power control parameters designed to mitigate interference and ensure reliable msgA RO and PO transmission. The system can dynamically adjust Preamble Received Target Power, DeltaPreamble, and other power control parameters to ensure that the msgA RO and PO in SBFD symbols / slots are transmitted at an appropriate power level to overcome the challenges of full-duplex communication.
[0237] Separate UL Power Control for Non-SBFD Symbols / Slots: For non-SBFD symbols / slots, where UL and DL transmissions are separated in time (as in traditional Time Division Duplex systems) , the interference levels are typically lower. As such, the msgA-ConfigCommon for non-SBFD symbols / slots can use standard UL power control settings optimized for less interference. This approach allows for more efficient power usage in non-SBFD symbols / slots, reducing unnecessary power consumption while maintaining reliable communication during msgA RO and PO transmission.
[0238] SBFD-Aware UE Configuration: For an SBFD-aware UE, the additional / new msgA (RO and PO) can be configured by the higher layer using msgA-ConfigCommon for SBFD symbols / slots. This configuration includes: Preamble Received Target Power specific to the higher interference levels in SBFD symbols / slots. UL Power Control Adjustments that dynamically account for the simultaneous UL / DL transmission in SBFD symbols / slots. Resource Allocation specific to the time domain of SBFD symbols / slots to prevent collisions with DL transmissions.
[0239] Non-SBFD UE Configuration: For the legacy msgA (RO and PO) in non-SBFD symbols / slots, a separate msgA-ConfigCommon is used. This configuration includes: Standard Preamble Received Target Power for UL power control in non-SBFD symbols / slots, where interference is lower. Time Domain Resource Allocation specific to UL slots in the non-SBFD symbol framework, ensuring efficient use of resources without requiring the additional adjustments necessary for full-duplex SBFD operation.
[0240] Benefits of Configuration 2:
[0241] By employing two separate configurations, Configuration 2 allows for more precise control over the UL power control and time domain resources for both SBFD and non-SBFD symbols / slots. This improves the flexibility of the system and ensures that each type of symbol / slot can be optimized for its specific transmission environment.
[0242] Since SBFD symbols / slots involve higher interference levels, having a dedicated configuration with its own power control parameters ensures that the msgA RO and PO can be transmitted reliably. This is particularly important in full-duplex environments where simultaneous UL and DL transmissions can create complex interference patterns.
[0243] In Configuration 2, the use of separate configurations for msgA RO and PO in SBFD and non-SBFD symbols / slots offers enhanced control over UL power control and resource management. This approach provides a flexible and efficient mechanism to manage the different interference levels and transmission requirements of SBFD and non-SBFD symbols / slots, ensuring that SBFD-aware UEs can optimize their performance in both environments. Through the use of msgA-ConfigCommon at the higher layer, the system can dynamically adjust to the needs of each symbol / slot type, improving reliability and energy efficiency in 5G NR systems.
[0244] For instance, the additional / new msgA can be configured in the SBFD symbols / slots through higher layer as shown in the example below.
[0245] In this embodiment, the separate additional configuration for the msgA Random Access Occasion (RACH) and msgA PUSCH Occasion (PO) in SBFD symbols / slots includes specific parameters that differ from those used in non-SBFD symbols / slots. These distinct parameters ensure that the uplink (UL) power control for SBFD symbols / slots is optimized for the unique challenges posed by full-duplex operations, such as higher interference due to simultaneous UL and DL transmissions.
[0246] The parameters that are common between SBFD and non-SBFD symbols / slots are not included in this additional configuration; only the parameters that are specific to SBFD symbols / slots are part of the separate configuration. Below is a detailed explanation of the key parameters included in the additional / new msgA RACH and PUSCH occasions for SBFD symbols / slots: Parameters for msgA RACH Occasion in SBFD Symbols / Slots. The UL power control for the msgA RACH occasion in SBFD symbols / slots is distinct from that in non-SBFD symbols / slots. The additional configuration includes specific power control parameters tailored to SBFD symbol / slot conditions: msgA-PreambleReceivedTargetPower-SBFD. This is an additional or new parameter introduced in the separate configuration to define the UL power control for the msgA RACH occasion in SBFD symbols / slots. It adjusts the target power level for the preamble transmitted by the UE during the RACH occasion in SBFD symbols / slots, taking into account the higher interference levels typical of full-duplex operations. The power settings for the preamble received target power in SBFD symbols / slots differ from those in non-SBFD symbols / slots to ensure the UL transmission can overcome interference.
[0247] Parameters for msgA PUSCH Occasion in SBFD Symbols / Slots: The UL power control for the msgA PUSCH occasion in SBFD symbols / slots includes specific parameters that allow for efficient and reliable PUSCH transmission under the unique conditions of SBFD symbols / slots: msgA-DeltaPreamble-SBFD. This parameter defines the UL power offset for the PUSCH transmission in SBFD symbols / slots. The DeltaPreamble for SBFD symbols / slots compensates for the higher interference encountered during simultaneous UL / DL transmissions, adjusting the power level appropriately to ensure the PUSCH data transmission is received successfully by the gNB. The DeltaPreamble-SBFD parameter differs from the standard DeltaPreamble used in non-SBFD symbols / slots.
[0248] P0-PUSCH-alphaset for SBFD Symbols / Slots: This parameter set includes the P0 value and the alpha coefficient for the SBFD symbols / slots. P0 represents the nominal power level for the PUSCH transmission, and alpha is the path loss compensation coefficient used to adjust the power based on the path loss between the UE and the gNB. The P0-PUSCH-alphaset for SBFD symbols / slots is configured separately from the non-SBFD symbols / slots to account for the different propagation and interference conditions in SBFD symbols / slots.
[0249] Closed Loop Power Control for SBFD Symbols / Slots: Closed loop power control for PUSCH in SBFD symbols / slots adjusts the transmission power based on feedback received from the gNB. The closed loop power control in SBFD symbols / slots is specifically tailored to handle the dynamically changing interference in full-duplex environments, where UL and DL transmissions occur simultaneously. This ensures that the UE can continuously adapt its transmission power to maintain a reliable connection in the face of fluctuating interference levels.
[0250] For msgA RACH Occasion in SBFD Symbols / Slots: msgA-PreambleReceivedTargetPower-SBFD: A separate target power setting to manage interference in SBFD symbols / slots during the RACH occasion. For msgA PUSCH Occasion in SBFD Symbols / Slots: msgA-DeltaPreamble-SBFD: A new power offset specifically designed for SBFD symbols / slots to handle the unique interference conditions. P0-PUSCH-alphaset-SBFD: Includes P0 and alpha values tailored for PUSCH transmissions in SBFD symbols / slots, considering path loss and interference. Closed Loop Power Control for SBFD Symbols / Slots: Continuously adjusts the transmission power based on real-time feedback to maintain reliable communication in SBFD symbols / slots.
[0251] The separate additional configuration for SBFD symbols / slots includes parameters that address the specific uplink power control needs of SBFD-aware UEs operating in full-duplex environments. By introducing distinct power control settings such as msgA-PreambleReceivedTargetPower-SBFD, msgA-DeltaPreamble-SBFD, and P0-PUSCH-alphaset for SBFD symbols / slots, the system ensures that UEs can maintain reliable communication in SBFD symbols / slots while dynamically adjusting power levels to compensate for the higher interference inherent in full-duplex operations. These specialized parameters allow the system to optimize performance for both RACH and PUSCH occasions in SBFD symbols / slots, while continuing to use common parameters for non-SBFD symbols / slots.
[0252] Embodiment #3: Time domain resources configuration of msgA RO in SBFD symbols / Slots:
[0253] In some embodiments, the wireless communication method further comprises determining a time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through an indication or a derivation mechanism. In some embodiments, determining the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises: indicating the time domain configuration of the first msgA ROs in the SBFD symbols / slots using a single physical random channel access (PRACH) configuration index. In some embodiments, the PRACH configuration index provides an indication of sub-frames, slots, and / or symbols where a physical random channel access (RACH) is configured in both the SBFD symbols / slots and the non-SBFD symbols / slots, the PRACH configuration index is applicable to the SBFD aware UEs and indicates sub-frames, slots, and / or or symbols where an SBFD operation is configured in at least one of downlink (DL) , UL, DL (DUD) subbands, DL, UL (DU) subbands, or UL, DL (UD) subbands. In some embodiments, determining the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises: configuring the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots for the SBFD aware UEs via a higher layer signaling.
[0254] In some embodiments, the time domain configuration of the first msgA ROs in the SBFD symbols / slots comprises at least one of following parameters: a frame number or sub-frame numbers used to indicate where the first msgA RO is configured within the SBFD symbols / slots; a starting symbol within a slot configured according to a starting duration of a SBFD operation within the slot; a number of msgA PRACH slots within a sub-frame based on a duration of the SBFD operation; a number of time-domain RACH occasions within a msgA-RACH slot; a PRACH duration in symbols used to indicate a start symbol and a length for a first msgA RACH occasion. In some embodiments, the time domain configuration of the first msgA POs in the SBFD symbols / slots is configured to the SBFD aware UEs, and wherein the time domain configuration comprises a starting subframe or slot; a starting symbol; a duration of the first msgA PO; and / or an end symbol within the SBFD symbol / slot. In some embodiments, the time domain configuration of the first msgA POs in the SBFD symbols / slots comprises a time offset between the first msgA POs in the SBFD symbols / slots and the second msgA POs in the non-SBFD symbols / slots.
[0255] In some embodiments, in the second configuration, the first msgA ROs and POs in the SBFD symbols / slots are configured separately from the second msgA ROs and POs in the non-SBFD symbols / slots. In some embodiments, time domain resources of the first msgA POs and / or ROs in the SBFD symbols / slots are configured for the SBFD symbols / slots using at least one of following parameters: a MsgA PRACH configuration index for the SBFD symbols / slots; a starting subframe or slot; a starting symbol; a duration of first MsgA RO; an end symbol; a time offset between first MsgA RO and PO in the SBFD symbols / slots; a number of slots containing one or multiple PUSCH occasions; an index for valid combinations of start symbol, length, and mapping type (SLIV) for a first MsgA PUSCH occasion.
[0256] Time Domain Resources Configuration / Indication of msgA RO and PO in SBFD Symbols / Slots (Configuration 1) : In Configuration 1, a single configuration is used to configure both the additional msgA Random Access Occasion (RO) and PUSCH Occasion (PO) in SBFD symbols / slots and the legacy msgA RO and PO in non-SBFD symbols / slots. The challenge is that current specifications, such as msgA-PRACH configuration index, only indicate the time domain location of msgA RO in UL frames, slots, or symbols, which does not fully support SBFD operations.
[0257] This embodiment proposes two alternative solutions to enable the use of one msgA-PRACH configuration index to indicate the time domain parameters for RACH configured in both SBFD and non-SBFD symbols / slots. This approach provides a more efficient and unified method for UEs to identify time domain resources for initial / random access across different types of symbols / slots.
[0258] Alternative Method 1: New Column in Existing Tables for SBFD Symbols / Slots: To enable the use of a single msgA-PRACH configuration index that can indicate time domain parameters for SBFD symbols / slots and non-SBFD symbols / slots, this embodiment introduces a new column to the existing time domain configuration tables in the 3GPP specification (such as Tables 6.3.3.2-2, 6.3.3.2-3, and 6.3.3.2-4 in TS 38.211) .
[0259] New Column for SBFD Symbols / Slots: The new column added to the time domain configuration tables will specifically indicate the sub-frame, slot, or symbol where the RACH occasion is configured for SBFD symbols / slots. This column will only be applicable to SBFD-aware UEs and will only indicate the sub-frames, slots, or symbols where SBFD operations are configured. For example, the column will indicate DUD, DU, or UD subbands where full-duplex operations occur, allowing the UE to understand when and where to expect UL symbols / slots within SBFD symbols / slots.
[0260] Unified Time Domain Indication: The msgA-PRACH configuration index will now indicate the time domain parameters for both SBFD and non-SBFD symbols / slots, based on the sub-frame, the number of slots within a sub-frame, the starting symbol, and the number of PRACH occasions. This unified index allows SBFD-aware UEs to seamlessly interpret the time domain location of RACH occasions in both symbol types, reducing the need for separate configurations or additional signaling.
[0261] An illustrative example of this new method is shown in Table 1. The table uses a single PRACH configuration index to indicate the time domain parameters for RACH in both SBFD symbols / slots and non-SBFD symbols / slots. The existing columns in the table 1 indicate time domain parameters such as sub-frame index, number of slots, starting symbol, and PRACH occasions for non-SBFD symbols / slots (traditional UL) . The new column indicates the corresponding SBFD symbols / slots, specifying the DUD, DU, or UD subbands where RACH occasions occur within SBFD operations.
[0262] Table 1: Random access configurations for FR1 and unpaired spectrum in SBFD duration:
[0263] Benefits:
[0264] Unified Configuration: The introduction of a new column allows the system to use one PRACH configuration index to indicate both SBFD and non-SBFD time domain parameters, simplifying configuration and resource allocation.
[0265] Alternative Method 2: Time Domain Derivation for SBFD Symbols: In this alternative method, the system can dynamically derive the time domain location for SBFD symbols / slots based on the existing time domain configuration index for non-SBFD symbols / slots. This approach uses a combination of explicit signaling and implicit derivation techniques to extend the existing time domain configuration framework for SBFD-aware UEs.
[0266] Implicit Time Domain Derivation: Instead of introducing a new column in the tables, this method proposes deriving the SBFD symbol / slot locations implicitly based on the non-SBFD time domain configurations already available in the PRACH configuration index. The gNB will signal the UEs with additional parameters indicating the shift or offset required to identify the corresponding SBFD symbols / slots based on the traditional UL time domain configurations. For example, if a specific non-SBFD sub-frame or slot is designated for UL RACH, the system can signal a time offset to indicate the corresponding SBFD time domain resources where full-duplex operations will take place.
[0267] In this example, the UEs can infer the SBFD symbols / slots based on a shift parameter signaled by the gNB, allowing them to determine when UL transmissions in SBFD symbols will occur relative to the non-SBFD schedule.
[0268] Benefits:
[0269] Dynamic Resource Allocation: This method enables dynamic derivation of SBFD resources without the need for separate configuration indexes or new table columns.
[0270] Flexibility: UEs can dynamically adjust to varying time domain resources based on network conditions, enhancing the flexibility of SBFD symbol scheduling.
[0271] This embodiment presents two alternative methods for indicating the time domain resources for msgA RO and PO in SBFD symbols / slots and non-SBFD symbols / slots using a single configuration. Alternative Method 1 introduces a new column in the existing tables to explicitly indicate SBFD-specific time domain resources, providing a unified solution for SBFD-aware UEs. Alternative Method 2 proposes implicit derivation of SBFD time domain resources based on existing non-SBFD configurations, offering a more dynamic and flexible approach. Both methods aim to enhance the efficiency and simplicity of time domain resource configuration for 2-step RACH in 5G NR systems that support both SBFD and non-SBFD operations.
[0272] Alternative Method 2: Explicit Configuration of msgA RO Time Domain Resources in SBFD Symbols / Slots: In this method, the time domain resources for the additional msgA Random Access Occasion (RO) in SBFD symbols / slots are explicitly configured to SBFD-aware UEs using higher layer signaling. This explicit configuration allows the UEs to know the exact frame, subframe, and symbol location of msgA RACH occasions within SBFD symbols, ensuring reliable initial / random access.
[0273] Frame Number / Sub-frame Numbers: This parameter explicitly indicates the frame and sub-frame numbers where the msgA RO is configured in SBFD symbols / slots. The UE can use this information to identify when SBFD symbols are available for RACH.
[0274] Starting Symbol within a Slot: This parameter specifies the starting symbol within a slot, corresponding to the start of SBFD operations. This ensures that the UE initiates the RACH process at the correct point within the SBFD slot.
[0275] Number of msgA PRACH Slots within a Sub-frame: This parameter depends on the duration of the SBFD operation within a sub-frame and indicates how many msgA PRACH slots are available for RACH occasions. It is configured based on the time domain period of SBFD operations.
[0276] Number of Time-domain RACH Occasions within a msgA-RACH Slot: This parameter determines how many msgA RACH occasions are available within each slot, ensuring that the UE knows how many opportunities exist for initial / random access within the time domain.
[0277] PRACH Duration (in Symbols / Slots) : This parameter indicates the start symbol, the duration, and the SLIV (Start and Length Indicator Value) for the first msgA RACH occasion. It specifies how long the msgA RACH process should last and at which symbols within the SBFD slot the process should occur.
[0278] Time Domain Configuration / Indication of msgA PUSCH Occasion (PO) in SBFD Symbols / Slots: In current specifications, the time domain resources for msgA PO in non-SBFD symbols / slots are indicated using the following parameters: msgA-PUSCH-TimeDomainAllocation, msgA-PUSCH-TimeDomainOffset, nrofSlotsMsgA-PUSCH, and startSymbolAndLengthMsgA-P. These parameters, however, only cover non-SBFD symbols / slots. In the case of a unified configuration (Configuration 1) , the time domain resources for msgA PO in SBFD symbols / slots need to be configured explicitly or through an additional mechanism. Two alternative methods are proposed to handle this configuration:
[0279] Alternative Method 1: Explicit Configuration of msgA PO Time Domain in SBFD Symbols / Slots: In this method, the time domain location for the msgA PO in SBFD symbols / slots is explicitly configured to the UE. This method defines the exact time domain location for msgA PO in the SBFD symbols / slots, including the following parameters:
[0280] Starting Subframe / Slot: This parameter specifies the subframe or slot where the msgA PO begins in SBFD symbols, helping the UE identify the exact location for PUSCH transmission.
[0281] Starting Symbol: Indicates the symbol within the slot where the msgA PO starts, allowing precise scheduling of PUSCH transmissions within the SBFD symbols / slots.
[0282] Duration: Specifies the duration of the msgA PO in SBFD symbols / slots, ensuring that the UE knows how long the PUSCH transmission will last in the time domain.
[0283] End Symbol: Indicates the end symbol of the msgA PO, helping the UE complete the PUSCH transmission at the right time without overlapping with other transmissions.
[0284] Alternative Method 2: Time Offset between msgA PO in SBFD and Non-SBFD Symbols / Slots: In this alternative, the existing msgA PO time domain configuration parameters (e.g., msgA-PUSCH-TimeDomainAllocation) are reused, but a new parameter is introduced to differentiate the time domain location of msgA PO in SBFD symbols / slots from the legacy msgA PO in non-SBFD symbols / slots. This approach introduces a time offset between the two types of symbols.
[0285] Time Offset Between msgA PO in SBFD and Non-SBFD Symbols / Slots: This new parameter provides a time offset that shifts the start of the msgA PO in SBFD symbols relative to its counterpart in non-SBFD symbols / slots. For example, if the non-SBFD msgA PO starts at a particular subframe and symbol, this offset adjusts the SBFD msgA PO to start at a different time within the SBFD symbols, ensuring no overlap or conflict between the two. This offset can be signaled to the UE through higher layer signaling, allowing dynamic adjustments based on network conditions and traffic demands.
[0286] In this embodiment, the existing specification parameters for the time domain configuration of the msgA PUSCH Occasion (PO) can be utilized for SBFD symbols / slots. However, to ensure proper differentiation between the additional msgA PO in SBFD symbols / slots and the legacy msgA PO in non-SBFD symbols / slots, a new parameter is introduced: the time offset between these two configurations. This method ensures that the time domain locations for the msgA PO in SBFD and non-SBFD symbols do not overlap or interfere with one another. The time offset parameter helps to shift the starting time of the msgA PO in SBFD symbols relative to the msgA PO in non-SBFD symbols. By introducing this time offset, the system can better manage resource allocation and prevent conflicts between SBFD and non-SBFD transmissions. The time offset represents a time shift between the additional msgA PO in SBFD symbols and the legacy msgA PO in non-SBFD symbols. This offset ensures that msgA PO transmissions in SBFD symbols do not overlap with those in non-SBFD symbols, thereby avoiding resource conflicts and ensuring efficient use of spectrum. The time offset is configured through higher layer signaling to the UE. The gNB signals the time offset to the UE, allowing it to adjust the start time of the msgA PO in SBFD symbols based on the configuration of the msgA PO in non-SBFD symbols. The use of higher layer signaling ensures that the time offset can be dynamically adjusted based on real-time network conditions and requirements.
[0287] The time offset parameter provides flexibility for the network to adapt to varying traffic and interference conditions. The gNB can configure different time offsets depending on the network load, spectrum availability, and interference levels in both SBFD and non-SBFD symbols. This dynamic adaptation allows for efficient resource management and enhances network performance, especially in environments where both SBFD and non-SBFD operations are occurring simultaneously. An illustrative example of the time offset mechanism is shown in FIG. 5. In this example, the msgA PO in non-SBFD symbols is configured with a certain start time and duration. The time offset shifts the start of the msgA PO in SBFD symbols by a predefined value, ensuring that the two PUSCH occasions do not overlap. The time offset is configured as follows: Legacy msgA PO in Non-SBFD Symbols. Start time: Slot X, Symbol Y. Duration: N Symbols. Additional msgA PO in SBFD Symbols. Start time: Slot X + Time Offset, Symbol Y. Duration: N Symbols. By introducing a time offset, the additional msgA PO in SBFD symbols is shifted relative to the legacy msgA PO in non-SBFD symbols. This ensures that the PUSCH occasions in both types of symbols are allocated separately in the time domain, preventing interference or resource conflicts.
[0288] The time offset ensures that msgA PO in SBFD symbols and msgA PO in non-SBFD symbols do not overlap, reducing the potential for interference between the two types of symbols. By differentiating the time domain resources between SBFD and non-SBFD symbols, the time offset improves overall spectrum efficiency. The system can allocate PUSCH resources more effectively across both symbol types. The time offset can be dynamically adjusted based on network conditions. For example, during high traffic periods, the offset can be increased to provide more separation between SBFD and non-SBFD operations. Conversely, during low traffic periods, the offset can be reduced to maximize resource utilization. The introduction of the time offset parameter between the msgA PO in SBFD symbols / slots and the legacy msgA PO in non-SBFD symbols / slots allows for efficient and conflict-free management of time domain resources in 5G NR systems. This method provides flexibility through higher layer signaling and ensures that the PUSCH occasions in both SBFD and non-SBFD symbols are appropriately differentiated. As a result, the system can dynamically manage time domain resources and prevent interference, leading to better overall network performance.
[0289] This embodiment introduces methods for explicitly configuring the time domain resources for msgA RO and PO in SBFD symbols / slots. Two methods are proposed: Alternative Method 1: Explicit configuration of the time domain location for msgA PO in SBFD symbols, defining parameters such as the starting subframe / slot, starting symbol, duration, and end symbol. Alternative Method 2: Introducing a time offset between msgA PO in SBFD symbols / slots and non-SBFD symbols / slots, allowing for reuse of existing time domain configuration parameters while ensuring separation between the two types of symbols. These methods allow for more precise control of the time domain resources for msgA RO and PO in SBFD operations, ensuring that SBFD-aware UEs can perform random / initial access effectively in full-duplex environments. The explicit configuration or time offset mechanism provides flexibility in managing time domain resources across SBFD and non-SBFD symbols, enhancing network efficiency and reliability in 5G NR systems.
[0290] Time Domain Resources in Configuration 2: In Configuration 2, two separate configurations are used to handle msgA RO (Random Access Occasion) and msgA PO (PUSCH Occasion) in SBFD and non-SBFD symbols / slots. One configuration is dedicated to the additional msgA RO and PO in SBFD symbols / slots, while the other configuration handles the legacy msgA RO and PO in non-SBFD symbols / slots. The time domain resources for both msgA RO and PO are configured separately for each type of symbol / slot, with different parameters provided to ensure proper resource allocation.
[0291] Time Domain Resources for msgA RO in SBFD Symbols / Slots: The additional configuration for msgA RO in SBFD symbols / slots may include the following options for indicating time domain resources:
[0292] Alt 1: msgA PRACH Configuration Index: The time domain resources for msgA RO in SBFD symbols / slots can be indicated through an extended msgA PRACH Configuration Index, which is tailored to SBFD operations. This index would specify time domain parameters such as sub-frame, slot, and symbol locations where the RACH occasion takes place within SBFD symbols.
[0293] Alt 2: Explicit Time Domain Configuration for msgA RO in SBFD Symbols: The time domain resources for msgA RO can be explicitly configured using higher layer signaling. This method provides the SBFD-aware UE with direct information about the location of msgA RO in SBFD symbols / slots. The following parameters may be used to explicitly configure msgA RO in SBFD symbols / slots:
[0294] Starting Subframe / Slot: Indicates the subframe or slot where the msgA RO begins in SBFD symbols / slots.
[0295] Starting Symbol: Specifies the symbol where the msgA RO starts within the slot.
[0296] Duration of msgA RO: Defines how long the msgA RO will last in SBFD symbols.
[0297] End Symbol: Specifies the symbol at which the msgA RO concludes.
[0298] Time Domain Resources for msgA PO in SBFD Symbols / Slots:
[0299] The additional configuration for msgA PO in SBFD symbols / slots can take either of the following approaches for indicating time domain resources:
[0300] Option 1: Direct Time Domain Configuration for msgA PO:
[0301] Starting Symbol and Length: The time domain location for msgA PO is directly configured, including the starting symbol and the length of the PUSCH occasion in SBFD symbols / slots.
[0302] Offset Between msgA RO and PO: A time offset can be specified between the additional msgA RO and the additional msgA PO in SBFD symbols / slots, ensuring the two occasions are appropriately spaced in time.
[0303] Number of Slots: This parameter specifies the number of slots containing one or multiple PUSCH occasions. Each slot can have the same time domain resource allocation for consistency across multiple occasions.
[0304] Option 2: Start and Length Indicator Value (SLIV) Index:
[0305] SLIV Index: An index can be provided to the UE that gives valid combinations of start symbol, length, and mapping type for the first msgA PUSCH occasion in SBFD symbols / slots. The SLIV index allows for flexible configuration while ensuring proper alignment of time domain resources for PUSCH transmission.
[0306] By using separate configurations for SBFD and non-SBFD symbols / slots, this method ensures that time domain resources for msgA RO and PO in each type of symbol are clearly differentiated, avoiding conflicts and resource misallocation. The ability to explicitly configure time domain parameters through higher layer signaling provides more granular control over resource allocation in SBFD symbols. This is especially useful in full-duplex operations, where simultaneous UL and DL transmissions need precise coordination. The use of either direct configuration (with start symbol, duration, and end symbol) or an SLIV index offers flexibility in managing the time domain resources for msgA PO in SBFD symbols, allowing for dynamic adaptation based on network conditions.
[0307] In Configuration 2, the time domain resources for msgA RO and PO are configured separately for SBFD and non-SBFD symbols / slots. For msgA RO in SBFD symbols, explicit configuration or an extended msgA PRACH Configuration Index can be used to define the exact time domain location. For msgA PO in SBFD symbols, either direct configuration with start symbols and durations or the use of an SLIV index provides flexibility in managing PUSCH occasions. This method ensures clear differentiation between SBFD and non-SBFD operations and allows for precise, dynamic resource allocation in both types of symbols.
[0308] Embodiment #4: Prioritization of msgA RO and msgA PO in SBFD or non-SBFD symbols / slots:
[0309] In some embodiments, the wireless communication method further comprises requesting the SBFD aware UEs to prioritize a use of the first msgA ROs and POs in the SBFD symbols / slots or a use of the second msgA ROs and POs in the non-SBFD symbols / slots based on predetermined criteria. In some embodiments, prioritization is determined based on: a first threshold defined based on the UL power control of MsgA RO, wherein a first MsgA in the SBFD symbols / slots is used if a measured UL power control value is less than or equal to the first threshold, and a second MsgA in the non-SBFD symbols / slots is used if the measured UL power control value exceeds the first threshold; or a second threshold defined based on cross link interference (CLI) -reference signal received power (RSRP) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSRP value is less than or equal to the second threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSRP value exceeds the second threshold; or a third threshold defined based on cross link interference (CLI) -received signal strength indicator (RSSI) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSSI value is less than or equal to the third threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSSI value exceeds the third threshold. In some embodiments, prioritization is determined based on configuring a highest priority among available random access opportunities to the UEs. In some embodiments, prioritization is determined based on enabling or disabling an initial / random access of MsgA in the SBFD symbols / slots through a higher layer signaling.
[0310] In this embodiment of the present disclosure, a prioritization procedure is proposed to enable the SBFD-aware UE to determine whether to use the additional / new msgA (RO and PO) in SBFD symbols / slots for random / initial access or to use the legacy msgA (RO and PO) in legacy non-SBFD UL symbols / slots / slots to perform random / initial access.
[0311] The motivation for this prioritization between the additional msgA (RO and PO) in the SBFD symbols / slots and the legacy msgA (RO and PO) in non-SBFD symbols / slots is based on the consideration that if it is left up to the UE implementation, the UE may always select either the legacy msgA (RO and PO) for initial / random access in the non-SBFD symbols / slots or the additional msgA (RO and PO) for initial / random access in SBFD symbols / slots. Consequently, in the former case, the same legacy msgA (RO and PO) may be selected by the legacy UE for its random / initial access, increasing the chances of collision in the initial / random access in legacy msgA (RO and PO) in non-SBFD symbols / slots between the SBFD-aware UE and the legacy UE. In the latter case, there may not be a fallback mechanism for the SBFD-aware UE to select the legacy msgA (RO and PO) when the msgA is not configured in the SBFD symbols / slots, or when the number of UEs performing random / initial access in SBFD symbols / slots is high.
[0312] This disclosure proposes the following method of prioritization for the SBFD aware UE between the additional msgA (RO and PO) in SBFD symbols / slots and the legacy msgA (RO and PO) in non-SBFD symbols / slots.
[0313] Alt method 1: prioritization of random access in SBFD symbols / slots based on pre-configure rules:
[0314] In this solution, predefined rules guide the SBFD-aware UE in choosing between using the additional msgA (RO and PO) for initial / random access in SBFD symbols / slots or the legacy msgA in non-SBFD symbols / slots. The proposed alternatives for these predefined rules are as follows:
[0315] Alt1: Define a threshold based on the UL power control (dBm) of msgA RO. The UE measures the UL power control of msgA RO. If the measured value is less than or equal to the threshold, the UE uses the additional msgA (RO and PO) for initial / random access in SBFD symbols / slots. If it exceeds the threshold, the UE performs access in non-SBFD symbols / slots.
[0316] Alt 2: Define a threshold based on CLI-RSRP measurements in SBFD symbols / slots. The UE measures the CLI-RSRP. If the value is less than or equal to the threshold, the UE uses the additional msgA (RO and PO) for access in SBFD symbols / slots. If it is greater, the UE uses the legacy msgA for access in non-SBFD symbols / slots.
[0317] Alt 3: Define a threshold based on CLI-RSSI measurements in SBFD symbols / slots. The UE measures the CLI-RSSI. If the value is less than or equal to the threshold, the UE uses the additional msgA (RO and PO) for access in SBFD symbols / slots. If it is greater, the UE uses the legacy msgA for access in non-SBFD symbols / slots.
[0318] Alt method 2: Define a prioritization procedure between the additional and legacy msgA:
[0319] In this method, in order to prioritize whether to use the additional / new msgA (RO and PO) configured in SBFD symbols / slots or whether to use the msgA (RO and PO) configured in non-SBFD symbols / slots for the SBFD aware UE. The highest priority among the available sets of random access can be configured to the UE. This configuration can be performed to the UE in SIB1 / SIBX. The UE based on the higher priority can select either the msgA RO and PO configured in SBFD symbols / slots or the msgA RO and PO configured in non-SBFD symbols / slots can be configured to the UE.
[0320] For instance, the priority of the msgA RO and PO configured in SBFD symbols / slots can be configured in the higher layer in the priority list as given below.
[0321] Based on the priority configure to the SBFD aware UE, the UE shall use the msgA RO and PO configured in SBFD symbols / slots. For instance, the network configures the UE with the following priority list (P0, P1) in the higher layer (e.g., SIB1 / SIBX) : where P0: Highest priority, associated with msgA in SBFD symbols / slots. P1: Second highest priority, associated with msgA in non-SBFD symbols / slots. The UE based on the priority list, the UE identifies that that msgA in SBFD symbols / slots has the highest priority. The UE selects the msgA RO and PO configured in SBFD symbols / slots due to the higher priority of P0.
[0322] Alt method 3: Enabling msgA (RO and PO) in SBFD symbols / slots.
[0323] To prioritize the additional msgA configured in SBFD symbols / slots for SBFD-aware UE, this method proposes to configure enabling of msgA (RO and PO) in SBFD symbols / slots. The random / initial access enabling can be configured to the UE via higher layer signaling. Based on this configuration, the UE can perform random / initial access in SBFD symbols / slots. If the enabling is not configured or if it is configured to disable the random / initial access in the SBFD symbols / slots, the UE can consider the configured msgA as disabled and use the legacy msgA configured in non-SBFD symbols / slots. For instance, the enabling and disabling can be configured to the UE in higher layer signaling as shown below.
[0324] Solution #2: UL Power Control for 4-Step RACH (msg1 and msg3) in SBFD Symbols / Slots:
[0325] In this disclosure, a single configuration is proposed for managing the 4-step Random Access Channel (RACH) process in both SBFD (sub-band full duplex) and non-SBFD symbols / slots. This solution focuses on enhancing the uplink (UL) power control for both msg1 and msg3 in SBFD symbols / slots. The goal is to ensure proper power adjustment for UEs in RRC connected, RRC idle, or RRC inactive states, enabling successful initial / random access in the 5G NR system.
[0326] SBFD Operations Pre-configured: It is assumed that SBFD operations within TDD DL / Flexible symbols / slots have already been configured for UEs using either RRC signaling or SIB1 / SIBx signaling. This enables SBFD-aware UEs to identify when SBFD symbols / slots are active and ready for use.
[0327] Single Configuration for 4-Step RACH: A single configuration is used to configure the 4-step RACH process for both SBFD and non-SBFD symbols / slots, simplifying the management of RACH across different types of symbols / slots. This configuration includes parameters that adjust the UL power control for msg1 and msg3 transmissions in SBFD symbols, ensuring proper communication in full-duplex environments where simultaneous UL and DL transmissions occur.
[0328] UL Power Control for msg1 and msg3 in SBFD Symbols / Slots:
[0329] msg1 UL Power Control: msg1 represents the RACH preamble transmission from the UE to the gNB (Next Generation Node B) . In SBFD symbols / slots, higher interference levels are expected due to simultaneous UL and DL transmissions, requiring adjustments to the UL power control of msg1. The configuration includes parameters that modify the msg1 Preamble Received Target Power and adjust the power levels according to the interference and propagation conditions in SBFD symbols. This ensures that the msg1 transmission can overcome interference and be successfully received by the gNB.
[0330] msg3 UL Power Control: msg3 is the PUSCH data transmission following the RACH process. Similar to msg1, msg3 in SBFD symbols / slots also experiences higher interference, and thus requires power control adjustments. The UL power control for msg3 includes parameters such as P0-PUSCH-alphaset and DeltaPreamble-SBFD, which are used to adjust the transmission power to ensure reliable PUSCH data transfer in SBFD symbols.
[0331] In the RACH configuration, the system configures parameters to adjust the uplink (UL) power control for msg1 (RACH preamble) and / or msg3 (PUSCH data transmission) in SBFD symbols / slots relative to the power control in non-SBFD symbols / slots. This adjustment ensures that the SBFD-aware UE can dynamically adapt its transmission power based on the differing interference and transmission conditions in SBFD versus non-SBFD operations. The process is illustrated in FIG. 6A, which demonstrates how the system modifies the power control settings for SBFD symbols / slots.
[0332] Configured Parameters for UL Power Control: The following parameters are proposed to adjust the UL power control for msg1 and msg3 in SBFD symbols / slots:
[0333] PreambleReceivedTargetPower-SBFD: This parameter defines the target power level for the msg1 RACH preamble transmission in SBFD symbols. It compensates for the higher interference levels encountered in full-duplex SBFD operations.
[0334] P0-PUSCH-alphaset-SBFD: This parameter set includes the P0 value (the nominal UL power level for PUSCH) and the alpha coefficient (the path loss compensation factor) for msg3 in SBFD symbols. These values are configured separately from non-SBFD symbols to account for the interference differences between the two types of symbols.
[0335] DeltaPreamble-SBFD: This power offset parameter adjusts the power level of the msg3 PUSCH occasion in SBFD symbols relative to the msg1 RACH preamble transmission. It ensures that msg3 can be transmitted with the necessary power to overcome the dynamic interference in SBFD operations.
[0336] RACH Configuration: Using the single configuration, the gNB configures the necessary UL power control parameters for SBFD-aware UEs. These parameters include the adjustments required for msg1 and msg3 power control in SBFD symbols, as well as standard power control for non-SBFD symbols.
[0337] UL Power Control Execution: Based on the configured parameters, the SBFD-aware UE determines the required UL power control for msg1 and msg3 in SBFD symbols / slots. The UE applies these power adjustments when performing the RACH procedure, ensuring successful transmission in high-interference environments.
[0338] Initial / Random Access: The UE performs the initial / random access using the adjusted UL power control settings for SBFD symbols / slots, allowing for effective communication despite the challenges posed by simultaneous UL / DL transmissions.
[0339] Benefits:
[0340] Improved Interference Management: By enhancing the UL power control for msg1 and msg3 in SBFD symbols, this solution ensures that the UE can overcome interference and maintain reliable communication in full-duplex environments.
[0341] Unified Configuration: The use of a single configuration for both SBFD and non-SBFD symbols simplifies the system design, making it easier to manage the RACH process across different types of symbols.
[0342] Dynamic Power Adjustment: The system can dynamically adjust the UL power control for msg1 and msg3 based on the interference conditions in SBFD symbols, improving the robustness of the RACH process in challenging network environments.
[0343] This solution proposes an enhanced approach to configuring the UL power control for msg1 and msg3 in SBFD symbols / slots as part of the 4-step RACH process. By introducing parameters such as PreambleReceivedTargetPower-SBFD, P0-PUSCH-alphaset-SBFD, and DeltaPreamble-SBFD, the system can dynamically adjust the power settings to ensure reliable initial / random access in full-duplex SBFD environments. The use of a single configuration for both SBFD and non-SBFD symbols further simplifies the RACH configuration process, ensuring more efficient network operations.
[0344] Configuration of 4-Step RACH in SBFD and Non-SBFD Symbols / Slots: This embodiment describes the configuration of the 4-step RACH process for SBFD symbols / slots and non-SBFD symbols / slots, with a focus on adjusting the UL (uplink) power control for msg1 (RACH preamble) and msg3 (PUSCH data transmission) . The system uses a single RACH configuration to manage the RACH occasions in both SBFD and non-SBFD symbols / slots for SBFD-aware UEs, as illustrated in FIG. 6B.
[0345] SBFD Operation Configuration: The base station configures the SBFD operation within TDD DL / Flexible symbols / slots for UEs in RRC connected or RRC idle / inactive states. The period / periodicity of the SBFD operation is similar to standard TDD operation, but the configuration explicitly indicates the uplink (UL) and downlink (DL) subbands for SBFD-aware UEs. The UL / DL subband configuration ensures that SBFD-aware UEs can correctly differentiate between the UL and DL symbols / slots during full-duplex operation, where simultaneous UL and DL transmissions occur.
[0346] Single RACH Configuration for Both SBFD and Non-SBFD Symbols / Slots: The base station configures a single RACH setup for SBFD-aware UEs that manages the RACH occasion in both SBFD symbols / slots and non-SBFD symbols / slots. This configuration is delivered to UEs through RRC signaling or SIB1 / SIBx, enabling UEs in RRC connected, idle, or inactive states to receive the necessary RACH configuration. The use of a single configuration simplifies the management of 4-step RACH across different types of symbols / slots, ensuring that the UEs can perform initial / random access regardless of whether they are operating in SBFD or non-SBFD symbols.
[0347] UL Power Control Adjustments for msg1 and msg3: The configuration includes parameters for adjusting the UL power control for msg1 and / or msg3 in SBFD symbols / slots relative to their counterparts in non-SBFD symbols / slots. Since SBFD symbols / slots involve full-duplex operation, where simultaneous UL and DL transmissions introduce higher interference, msg1 and msg3 power control must be adapted to compensate for these conditions. The following parameters may be configured for UEs to dynamically adjust their UL transmission power based on the type of symbol (SBFD or non-SBFD) :
[0348] PreambleReceivedTargetPower-SBFD: Adjusts the msg1 RACH preamble power for SBFD symbols, ensuring sufficient power to overcome the higher interference levels.
[0349] P0-PUSCH-alphaset-SBFD: Defines the P0 (nominal UL power) and alpha (path loss compensation) for msg3 PUSCH transmission in SBFD symbols, tailored for full-duplex conditions.
[0350] DeltaPreamble-SBFD: Provides an offset to adjust the UL power of msg3 based on the power level set for msg1 in SBFD symbols.
[0351] SBFD and Non-SBFD Power Control Differentiation: The base station configures the power control mechanisms for SBFD and non-SBFD symbols separately but under the same RACH configuration. The system dynamically adjusts UL power control parameters as follows:
[0352] SBFD Symbols / Slots: UEs increase UL transmission power due to simultaneous UL and DL transmission interference. Configured parameters ensure that the UEs transmit with enough power to maintain reliable communication.
[0353] Non-SBFD Symbols / Slots: UEs follow standard UL power control settings for msg1 and msg3, where interference is typically lower because UL and DL transmissions are separated in time.
[0354] FIG. 6B illustrates how the base station configures the SBFD operation and adjusts the UL power control for msg1 and msg3 in SBFD symbols / slots relative to non-SBFD symbols / slots. FIG. 6B shows the periodicity of the SBFD operation, how the uplink and downlink subbands are explicitly configured, and how the single RACH configuration is used to manage both SBFD and non-SBFD symbols for SBFD-aware UEs.
[0355] This solution provides a single RACH configuration for both SBFD and non-SBFD symbols / slots, enabling SBFD-aware UEs to perform the 4-step RACH process with appropriate UL power control adjustments for msg1 and msg3. The base station configures the SBFD operation within the TDD DL / Flexible symbols / slots framework and explicitly defines the UL and DL subbands. UEs dynamically adjust their UL power based on the configured parameters, ensuring reliable initial / random access in both full-duplex (SBFD) and time-separated (non-SBFD) environments.
[0356] This embodiment outlines the key innovations introduced for configuring the 4-step RACH procedure in SBFD (Sub-band Full Duplex) symbols / slots and non-SBFD symbols / slots for SBFD-aware UEs. The innovations focus on enhancing and adjusting the uplink (UL) power control of msg1 (RACH preamble) and msg3 (PUSCH data transmission) in SBFD symbols / slots relative to non-SBFD symbols / slots. FIG. 6B illustrates these innovations.
[0357] 1. Unified RACH Configuration for SBFD and Non-SBFD Symbols / Slots: The single configuration manages the 4-step RACH process across both SBFD and non-SBFD symbols / slots. This unified configuration simplifies system management and signaling by eliminating the need for multiple RACH configurations based on symbol type. UEs can seamlessly switch between SBFD and non-SBFD operations during the RACH process, reducing complexity in handling different symbols and improving efficiency.
[0358] 2. Dynamic UL Power Control Adjustments for msg1 and msg3 in SBFD Symbols / Slots: UL power control for msg1 and msg3 is dynamically adjusted for SBFD symbols / slots, which experience higher interference due to simultaneous UL and DL transmissions. Parameters such as PreambleReceivedTargetPower-SBFD, P0-PUSCH-alphaset-SBFD, and DeltaPreamble-SBFD are introduced to handle the increased interference in SBFD operations, ensuring that UEs transmit with enough power to maintain reliable communication. By tailoring UL power control for msg1 and msg3 in SBFD symbols, the system improves the reliability of the RACH process and ensures stable communication even in full-duplex environments with high interference levels.
[0359] 3. Explicit Indication of UL and DL Subbands in SBFD Symbols / Slots: The configuration explicitly defines the uplink (UL) and downlink (DL) subbands for SBFD symbols, ensuring that the UE can properly distinguish between the two and adjust its transmissions accordingly. This explicit definition allows UEs to accurately time their UL transmissions in SBFD symbols without conflicting with simultaneous DL operations, improving coordination between UL and DL transmissions in full-duplex systems.
[0360] 4. Power Control Differentiation Between SBFD and Non-SBFD Symbols / Slots: The configuration ensures that UL power control is specifically adapted for SBFD symbols, where msg1 and msg3 require higher power to overcome interference. In contrast, non-SBFD symbols use standard power control settings, where interference is lower due to time-separated UL / DL transmissions. By dynamically adjusting power control settings for SBFD symbols relative to non-SBFD symbols, the system optimizes resource allocation and reduces unnecessary power usage in non-SBFD symbols while ensuring robust transmission in SBFD symbols.
[0361] 5. Higher Layer Signaling to Configure RACH and Power Control Parameters: The base station configures the RACH process and UL power control parameters for SBFD and non-SBFD symbols through RRC signaling or SIB1 / SIBx, ensuring that the UEs receive the necessary information to perform 4-step RACH under varying conditions. This higher layer signaling ensures that UEs in RRC connected, idle, or inactive states can adjust their RACH process and UL power dynamically based on network configuration, leading to a more flexible and adaptable communication process.
[0362] 6. Single RACH Configuration for Multiple States (RRC Connected, Idle, Inactive) : The single configuration can be applied across different states of the UEs, whether they are in RRC connected, RRC idle, or RRC inactive modes. This ensures that the UEs can seamlessly initiate or resume the RACH process regardless of their state. This enhances the efficiency of network access for UEs, enabling faster and more reliable initial / random access across multiple states.
[0363] Summary of Parameters Configured for SBFD Symbols / Slots: PreambleReceivedTargetPower-SBFD: Adjusts the msg1 UL transmission power for SBFD symbols to overcome interference. P0-PUSCH-alphaset-SBFD: Configures the nominal power level (P0) and path loss compensation (alpha) for msg3 in SBFD symbols. DeltaPreamble-SBFD: Defines the power offset between msg1 and msg3 to ensure that both transmissions maintain adequate power levels in SBFD symbols. The innovation points associated with the 4-step RACH configuration in SBFD and non-SBFD symbols / slots, as illustrated in FIG. 6B, enhance the UL power control for SBFD-aware UEs. By introducing dynamic power control adjustments for msg1 and msg3 in SBFD symbols, explicitly defining UL and DL subbands, and using a unified configuration for both SBFD and non-SBFD operations, this approach ensures that UEs can effectively manage initial / random access in both full-duplex and traditional time-separated environments. This leads to more reliable network access and optimized power usage in 5G NR systems.
[0364] FIG. 6C is a flowchart illustrating a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a base station according to an embodiment of the present disclosure. The wireless communication method executed by the base station includes an operation 601C, performing a configuration of 4-step RACH in SBFD symbols / slots to SBFD aware user equipments (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, and an operation 602C, configuring at least one uplink (UL) power control parameter to the UEs, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots. In some embodiments, the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.
[0365] FIG. 6D is a flowchart illustrating a wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a user equipment (UE) according to an embodiment of the present disclosure. The wireless communication method executed by the base station includes an operation 601D, receiving a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to from a base station, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and an operation 602D, being configured with at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots. In some embodiments, the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.
[0366] In the single RACH configuration, methods are proposed to determine and adjust the uplink (UL) power control for both msg1 (PRACH) and msg3 (PUSCH) in SBFD symbols / slots. These methods ensure that UEs can dynamically adjust their power levels based on the specific requirements of SBFD symbols / slots, accounting for higher interference due to simultaneous UL and DL transmissions in full-duplex systems.
[0367] 1. UL Power Control Adjustment for msg1 (PRACH) in SBFD Symbols / Slots: Embodiment #5, describes the methods used to adjust or determine the UL power control for msg1 (PRACH) in SBFD symbols / slots. The adjustment methods take into account the unique interference patterns of full-duplex operations, where simultaneous UL and DL transmissions are active. PreambleReceivedTargetPower-SBFD: The method adjusts the preamble transmission power to ensure that the msg1 RACH occasion in SBFD symbols is transmitted with sufficient power to overcome higher interference. The adjustment allows for seamless initial access and ensures that the PRACH process is not disrupted by the simultaneous DL transmissions typical in SBFD operations.
[0368] 2. UL Power Control Adjustment for msg3 (PUSCH) in SBFD Symbols / Slots: Embodiment #5, details the methods used to adjust or determine the UL power control for msg3 (PUSCH) in SBFD symbols / slots. Given that msg3 carries PUSCH data and is typically transmitted after msg1 in the 4-step RACH process, it requires specific power control adjustments to ensure stable data transmission. P0-PUSCH-alphaset-SBFD: This method configures the nominal power level (P0) and alpha (path loss compensation) for msg3 in SBFD symbols, ensuring that the transmission power is adequate to maintain data integrity despite the full-duplex interference. DeltaPreamble-SBFD: Additionally, a power offset (DeltaPreamble-SBFD) is introduced to adjust the power control of msg3 relative to msg1, ensuring that the UE can handle both occasions within the interference-heavy SBFD environment.
[0369] The single RACH configuration introduces methods to effectively manage and adjust the UL power control for both msg1 (PRACH) and msg3 (PUSCH) in SBFD symbols / slots. By using tailored parameters such as PreambleReceivedTargetPower-SBFD, P0-PUSCH-alphaset-SBFD, and DeltaPreamble-SBFD, these methods ensure that UEs can reliably initiate and maintain communication in full-duplex SBFD operations. Detailed explanations of these methods are provided in Embodiment #5.
[0370] In some embodiments, the at least one UL power control parameter comprises a parameter of preamble received target power and / or a parameter of ΔMsg3_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for UL power control, the parameter of preamble received target power is used to adjust an UL power control for Msg1 and / or Msg3 in the SBFD symbols / slots, the parameter of ΔMsg3_PUSCH is determined from a parameter of Msg3-deltapreamble, and the parameter of Msg3-deltapreamble is a power offset of Msg3 physical uplink shared channel (PUSCH) and is used to adjust the UL power control for Msg3 in the SBFD symbols / slots. In some embodiments, the at least one UL power control parameter comprises a preamble received target power, and / or a power offset for the first Msg1 ROs in the SBFD symbols / slots relative to the second Msg1 ROs in the non-SBFD symbols / slots. In some embodiments, the at least one UL power control parameter comprises a scaling factor eta (η) , wherein the scaling factor eta (η) scales a preamble received target power of the first Msg1 ROs in the non-SBFD symbols / slots to adjust an UL power control of first Msg1 ROs in the SBFD symbols / slots. In some embodiments, the scaling factor eta (η) is determined based on preamble received target power for the first Msg1 ROs in the SBFD symbols / slots and a Msg1 ROs preamble received target power for the second Msg1 ROs in the non-SBFD symbols / slots. In some embodiments, the scaling factor eta (η) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots. In some embodiments, the scaling factor eta (η) is selected from a range of 1.2, 1.4, 1.6, or 1.8.
[0371] In some embodiments, the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset for the Msg3 in the SBFD symbols / slot, an offset used to adjust the UL power control of the Msg3 in the SBFD symbols / sots, and / or a scaling factor gamma (γ) used to adjust the UL power control of the Msg3 in the SBFD symbols / slots. In some embodiments, the offset comprises a power offset for the UEs relative to the UL power control used for Msg3 PUSCH in the non-SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on the power offset. In some embodiments, the scaling factor is a single scaling factor gamma (γ) configured to the UEs to adjust the UL power control for the Msg3 PUSCH in the SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on a single scaling factor gamma (γ) . In some embodiments, the scaling factor is individual scaling factors γ 1, γ 2, and γ 3 configured to the UEs to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of Msg3 PUSCH in the SBFD symbols / slots.
[0372] Embodiment #5: UL power control of PRACH and msg1 and msg3 configured in SBFD and non-SBFD symbols / slots:
[0373] In this embodiment of the present disclosure, the UL power control of 4-step RACH (msg1) and msg3, where a single configuration is assumed to configure the PRACH (msg1) in 4 step RACH in SBFD symbols / slots is discussed. Furthermore, the design of separate UL power control for the msg3 located in SBFD symbols / slots, when the P0-PUSCH-alphaset is not provide / configured to the UE is discussed.
[0374] Separate UL power control for PRACH (msg1) in SBFD symbols / slots:
[0375] According to the current specification [TS38.213] the UL power control parameters of PRACH (msg1) in 4-step RACH can be determined according to the following equation: PPRACH, b, f, c (i) =min {PCMAX, f, c (i) , PPRACH, target, f, c+PLb, f, c} [dBm] , where the where PCMAX, f, c (i) is the UE configured maximum output power, and PPRACHtarget, f, c is configured to the UE according to the following parameters such as preambleReceivedTargetPower and DeltaPreamble. To configure separate UL power control for the PRACH (msg1) located in SBFD symbols / slots, this embodiment of the present disclosure proposes the following alternative options.
[0376] Alt option 1: Configure a power offset for UL power control for additional RACH (msg1) in SBFD symbols / slots:
[0377] In this option, we assume that a single configuration is used to configure the additional RACH in SBFD symbols / slots and legacy RACH in non-SBFD symbols / slots, where the UE is configured with preambleReceivedTargetPower for UL power control of RACH occasion (msg1) in the non-SBFD symbols / slots. This option proposes to introduce a power offset value relative to the preamble Received Target Power in the non-SBFD symbols / slots to adjust the UL power control of RACH occasion (msg1) in SBFD symbols / slots. The SBFD-aware UE can use the following equation to determine the preamble received target power of the msg1 in SBFD symbols / slots relative to non-SBFD symbols / slots: Preamble Received Target Power in SBFD symbols / slots =Preamble Received Target Power in non-SBFD symbols / slots +Power Offset.
[0378] Once the SBFD aware UE has the correct value of preamble received target power according to the UL power control requirements of the SBFD symbols / slots, the UE can find out PPRACHtargetfc and thus UL power control of msg1 in SBFD symbols / slots using the equation of the currents specification as given below for reference: PPRACH, b, f, c (i) =min {PCMAX, f, c (i) , PPRACH, target, f, c+PLb, f, c} [dBm] . This approach ensures that the UE can appropriately adjust its UL power for transmission in msg1 in SBFD symbols / slots. The configuration of power offset for msg1 as shown in the IE example below.
[0379] Alt Option 2: Configure a scaling factor eta (η) :
[0380] In this option, this embodiment of the present disclosure proposes to configure a scaling factor eta (η) for the SBFD-aware UE to scale the preambleReceivedTargetPower in SBFD symbols / slots relative to the UL power control of the msg1 in non-SBFD symbols / slots. This scaling factor eta (η) can be used to adjust the UL power control of the msg1 in SBFD symbols / slots, relative to the UL power control of RACH (msg1) in non-SBFD symbols / slots. The UE can calculate the preambleReceivedTargetPower for UL power control in SBFD symbols / slots using the following equation: preambleReceivedTargetPower (SBFD symbols) = preambleReceivedTargetPower*η. The scaling factor eta (η) may have different values, determined based on the following alternatives:
[0381] Alt1: To find the value of scaling eta (η) the following equation can be used:
[0382] Alt2: The scaling factor Beta eta (η) can be configured by the UE according to the Cross link interference (CLI) measured in the SBFD symbols / slots. For instance, eta (η) can be in the range of {1.2, 1.4, 1.6, 1.8} .
[0383] The configuration example of the scaling factor Beta value is given below.
[0384] Separate UL power control for MSG3 in SBFD symbols / slots:
[0385] According to current specification TS 38.213, the UL power control parameters of msg3 can be determined based on the following equation:
[0386] [dBm] .
[0387] The UL power control of msg3 is generally determined form the P0-PUSCH-AlphaSet and Transmit Power Control (TPC) Command, where the TPC is generally indicated in the DCI and it targets the closed loop power control sent by the network. In case P0-PUSCH-Alpha set is not provided the UE, the UE determine its UL power control from the preambleReceivedTargetPower and smg3-deltapreamble as given below [TS 38.213] .
[0388] In this embodiment we discuss the following two cases to determine the UL power control of the msg3 when the P0-PUSCH-aplha set is provided / configured to the UE and not provided / configured to the UE as given below.
[0389] Case A: If P0-PUSCH-aplha set is not provided.
[0390] In case A, in order to determine the UL power control parameters of msg1, this embodiment of the present disclosure proposes to re-interpret / enhance the following parameter.
[0391] preambleReceivedTargetPower: This parameter of the UL power control for msg1 can be adjusted according to embodiments to adjust the UL power control of the msg3 in SBFD symbols / slots.
[0392] ΔMsg3_PUSCH: As the ΔMsg3_PUSCH is determined from the msg3-deltaPreamable. However according to current specification msg3-DeltaPreamble itself is a Power offset of msg3 PUSCH relative to the preamble received target power. Therefore, in this embodiment we prosed to configure a separate msg3-DeltaPreamble-SBFD to the SBFD aware UE for the msg3 in SBFD symbols / slots in order to adjust the UL power control of the msg3 in SBFD symbols / slots. The configuration example is shown below.
[0393] Case B: If P0-PUSCH-Alphaset is provided / Configured.
[0394] In case P0-PUSCH-alphaset is configured for the UE, it determines the UL power control of msg3 using the following equation as given in current specification:
[0395] [dBm] .
[0396] This equation contains the parameters P0 and alpha, and closed loop power control. For UL power control of msg3, we assume that the P0, and alpha is configured to for the UL power control in non-SBFD symbols / slots. Moreover, for Msg3, closed loop power control is provided to the UE through DCI in the TPC command. Therefore, to adjust the UL power control of msg3 in SBFD symbols / slots, this embodiment of the present disclosure proposes to re-interpret / re-defined the P0-PUSCH-alphaset (including P0 and alpha) , for msg3 in SBFD symbols / slots. This re-interpretation of P0-PUSCH-alphaset is similar to as discussed in Embodiment #2 case B above, and given below for reference.
[0397] Alt Option 1: Configure a new P0-PUSCH-alphaset for msg3 in SBFD symbols / slots: In this option, a new P0-PUSCH-alphaset is configured specifically for the UL power control parameters of the msg3 in SBFD symbols / slots. This configuration allows for precise control and adjustment of the UL power for msg3 in SBFD symbols / slots, and the SBFD aware UE use this set to adjust the UL power control of the msg3 in the SBFD symbols / slots.
[0398] Alt Option 2: Configure an offset to adjust the UL power control of the msg3 in SBFD symbols / slots: In this embodiment, the present disclosure proposes configuring a power offset value for the msg3 in SBFD relative to the UL power control of msg3 in non-SBFD symbols / slots. This power offset value can be utilized to calculate the UL power control of the msg3 in SBFD symbols / slots. The proposed alternatives are as follows:
[0399] Alt1: In this alternative approach, a power offset can be configured for the UE as a single value relative to the Uplink Power Control (e.g. related to PPUSCH, b, f, c (i, j, q, l) ) relative to the PUSCH UL power control in non-SFBD symbols / slots. The actual value of the Uplink Power Control for the msg3 can then be calculated based on this configured power offset value. For example, the UL power control of the msg3 can be determined using the following equation: msg3 UL power control in SBFD symbols / slots =msg3 UL power control (non-SBFD symbols / slots) + puwer offset value.
[0400] Alt2: In this alternative approach, configure the offset values for the P0-PUSCH-alphaset relative to its values in non-SBFD symbols / slots. Based on these offset values, the UE can adjust the P0-PUSCH-alphaset in SBFD symbols / slots and the closed loop power control is provided to the UE in the DCI. For example, the P0-PUSCH-alphaset includes the values of P0 and alpha, which are already configured for the non-SBFD symbols / slots. The offset values can be configured individually for P0, and alpha. Using these offset values, the UE can adjust the P0, and alpha used for the msg3 in SBFD symbols / slots. Once the UE has the correct values for P0, alpha (collectively P0-PUSCH-alphaset) , it can calculate the actual uplink power control for the msg3 in SBFD symbols / slots. The equations to calculate P0, and alpha for msg3 in SBFD symbols / slots are as follows:
[0401] P0 in SBFD symbols / slots = P0 in non SBFD symbols / slots + offset value.
[0402] alpha in SBFD symbols / slots = alpha in non SBFD symbols / slots + offset value.
[0403] Alt Option 3: Configure a scaling factor gamma (γ) to adjust the UL power control of the msg3 in SBFD symbols / slots:
[0404] In this option, this embodiment of the present disclosure proposes configuring a scaling factor (sigma σ) value for the msg3 in SBFD relative to the UL power control of the msg3 in non-SBFD symbols / slots. This scaling factor (sigma) can be used to adjust the UL power control of the msg3 in SBFD symbols / slots, relative to the msg3 in non-SBFD symbols / slots. The following alternatives can be used for the scaling factor to adjust the UL power control of the msg3 in SBFD symbols / slots:
[0405] Alt1: A single scaling factor gamma (γ) can be used to adjust the overall UL power control of the msg3 in SBFD. For instance, the UL Power Control is configured to the UE for the non-SBFD symbols / slots for msg3. The scaling factor can be used according to the following equation: msg3 UL power control of SBFD symbols / slots = UL power control in non-SBFD symbols / slots x γ.
[0406] The scaling factor sigma can be defined as given in the following equation:
[0407] Alt 2: In this alternative, the individual scaling factors (gamma (γ1, γ2) can be configured to the SBFD aware UE in order to adjust the value of P0, alpha (P0-PUSCH-alphaset) for msg3 in SBFD symbols / slots relative to non-SBFD symbols / slots respectively. Where γ1 is corresponding to the scaling factor of P0, and γ2 is corresponding to the scaling factor of alpha. Based on the scaling factors the value of P0, and alpha for msg3 in SBFD symbols / slots relative to non-SBFD symbols / slots can be found. Once the UE has the correct values of P0, alpha (collectively P0-PUSCH-alphaset) according to the SBFD symbols / slots, the UE can calculate the actual UL power control of the msg3 in SBFD. The equations which can calculate the P0, and alpha for msg3 in SBFD symbols / slots are given below:
[0408] msg3 P0 in SBFD symbols / slots = msg3 P0 in non-SBFD symbols / slots x γ1 .
[0409] msg3 alpha in SBFD symbols / slots = msg3 alpha in non-SBFD symbols / slots x γ2.
[0410] The scaling factors γ1 and γ2 can be defined as given in the following equations:
[0411] FIG. 7 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station 20 such as gNB for communication in a communication network system 40 according to an embodiment of the present disclosure are provided. The communication network system 40 includes one or more UEs 10 and a base station 20.
[0412] The base station 20 is configured to perform a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to SBFD aware user equipment (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and configure at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.
[0413] The base station 20 is configured to perform a configuration of 4-step RACH in SBFD symbols / slots to SBFD aware user equipments (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, and configure at least one uplink (UL) power control parameter to the UEs, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.
[0414] The UE 10 is configured to receive a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to from a base station, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots, and the UE 10 is configured with at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.
[0415] The UE 10 is configured to receive a configuration of 4-step RACH in SBFD symbols / slots, and the UE 10 is configured with at least one uplink (UL) power control parameter, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.
[0416] The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11or 21 may be configured to implement proposed functions, procedures and / or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and / or receives a radio signal.
[0417] In this disclosure, the base station 20 can be an entity which is used to transmit or receive information, such as gNB. The base station 20 can also be eNodeB, transmission reception point, TRP, the NodeB in next generation communication or access point in WIFI. The UE 10 is an entity which is used to transmit or receive information at user side, such as a cell phone UE. The UE 10 can also be called as terminal, UE, mobile station, mobile terminal. The UE 10 can mobile phone, pad, VR, AR, wireless terminal of industrial control, wireless terminal of self-driving, wireless terminal of remote medical surgery, wireless terminal of smart grid, wireless terminal of transport safety, wireless terminal of smart city, wireless terminal of smart home, etc. Furthermore, the terminal and base station can be deployed in land, include indoor, outdoor, handheld, on-board, it can also deploy on the water, air, plane, drone or satellite.
[0418] FIG. 8 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and / or software. FIG. 8 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory / storage 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors, or digital signal processor. The processors may be coupled with the memory / storage and configured to execute instructions stored in the memory / storage to enable various applications and / or operating systems running on the system.
[0419] While the present disclosure has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.
Claims
1.A wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a base station, comprising:performing a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to SBFD aware user equipment (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots; andconfiguring at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.2.The wireless communication method of claim 1, wherein the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.3.The wireless communication method of claim 2, wherein in the first configuration, the at least one UL power control parameter comprises at least one parameter used to adjust the UL power control of the first msgA ROs and POs in the SBFD symbols / slots.4.The wireless communication method of claim 3, wherein in the first configuration, the at least one UL power control parameter comprises a preamble received target power, a path loss, and / or a power offset for the first msgA ROs and POs in the SBFD symbols / slots relative to the second msgA ROs and / or POs in the non-SBFD symbols / slots.5.The wireless communication method of claim 3, wherein in the first configuration, the at least one UL power control parameter comprises a scaling factor Beta (β) , wherein the scaling factor Beta (β) scales a msgA preamble received target power to adjust the UL power control of the first msgA ROs and / or POs in the SBFD symbols / slots.6.The wireless communication method of claim 5, wherein the scaling factor Beta (β) is determined based on the msgA preamble received target power for the first msgA ROs and / or POs in the SBFD symbols / slots and a msgA preamble received target power for the second msgA ROs and / or POs in the non-SBFD symbols / slots.7.The wireless communication method of claim 5, wherein the scaling factor Beta (β) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots.8.The wireless communication method of claim 7, wherein the scaling factor Beta (β) is selected from 1.2, 1.4, 1.6, or 1.8.9.The wireless communication method of any one of claims 2 to 8, wherein in the first configuration, the at least one UL power control parameter comprises a parameter of msgA-preamble received target power and / or a parameter of ΔMsgA_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for the UL power control, the parameter of msgA-preamble received target power is used to adjust the UL power control for the first msgA ROs in the SBFD symbols / slots, the parameter of ΔMsgA_PUSCH is determined from a parameter of msgA-delta preamble, and the parameter of msgA-delta preamble is a power offset of msgA physical uplink shared channel (PUSCH) and is used to adjust the UL power control for the first msgA POs in the SBFD symbols / slots.10.The wireless communication method of claim 9, wherein in the first configuration, the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset and a closed loop power control for the first msgA POs in the SBFD symbols / slots.11.The wireless communication method of claim 9, wherein in the first configuration, the at least one UL power control parameter comprises an offset used to adjust the UL power control of the first msgA POs in the SBFD symbols / slots.12.The wireless communication method of claim 11, wherein the offset comprises a power offsets in terms of values for the UEs relative to the UL power control used for second msgA POs in the non-SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the power offset.13.The wireless communication method of claim 9, wherein in the first configuration, the at least one UL power control parameter comprises offset values for the P0-PUSCH-alpha set and a closed-loop power control in the non-SBFD symbols / slots, the offset values for P0, alpha, and a closed-loop index are adjusted individually, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated by mathematically operating the offset values with the values of P0, alpha, and the closed-loop index in the non-SBFD symbols.14.The wireless communication method of claim 9, wherein in the first configuration, the at least one UL power control parameter comprises a scaling factor to adjust the UL power control of the first msgA POs in SBFD symbols / slots.15.The wireless communication method of claim 14, wherein the scaling factor is a single scaling factor (sigma σ) configured to adjust the UL power control for the first msgA POs in the SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the single scaling factor (sigma σ) .16.The wireless communication method of claim 14, wherein the scaling factor is individual scaling factors σ1, σ2, and σ3 configured to the UE to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of the first msgA POs in the SBFD symbols / slots.17.The wireless communication method of claim 1, wherein the second configuration is two separate configurations comprising one configuration for the first msgA ROs and POs in the SBFD symbols / slots and another configuration for the second msgA ROs and POs in the non-SBFD symbols / slots.18.The wireless communication method of claim 17, wherein in the second configuration, the one configuration comprises a parameter of msgA-ConfigCommon used to configure the first msgA ROs and POs in the SBFD symbols / slots, and the another configuration comprises a parameter of msgA-ConfigCommon used to configure the second msgA ROs and POs in the non-SBFD symbols / slots.19.The wireless communication method of claim 18, wherein in the second configuration, the parameters of msgA-ConfigCommon, comprises:the parameter of msgA preamble received target power for the UL power control of the first msgA ROs in the SBFD symbols / slots; andthe parameters of msgA Delta preamble, P0, alpha and / or closed loop index for the UL power control of the first msgA POs in the SBFD symbols / slots.20.The wireless communication method of claim 1, further comprising:determining a time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through an indication or a derivation mechanism.21.The wireless communication method of claim 20, wherein determining the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises:indicating the time domain configuration of the first msgA ROs in the SBFD symbols / slots using a single physical random channel access (PRACH) configuration index.22.The wireless communication method of claim 21, wherein the PRACH configuration index provides an indication of sub-frames, slots, and / or symbols where a physical random channel access (RACH) is configured in both the SBFD symbols / slots and the non-SBFD symbols / slots, the PRACH configuration index is applicable to the SBFD aware UEs and indicates sub-frames, slots, and / or or symbols where an SBFD operation is configured in at least one of downlink (DL) , UL, DL (DUD) subbands, DL, UL (DU) subbands, or UL, DL (UD) subbands.23.The wireless communication method of claim 20, wherein determining the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises:configuring the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots for the SBFD aware UEs via a higher layer signaling.24.The wireless communication method of claim 23, wherein the time domain configuration of the first msgA ROs in the SBFD symbols / slots comprises at least one of following parameters:a frame number or sub-frame numbers used to indicate where the first msgA RO is configured within the SBFD symbols / slots;a starting symbol within a slot configured according to a starting duration of a SBFD operation within the slot;a number of msgA PRACH slots within a sub-frame based on a duration of the SBFD operation;a number of time-domain RACH occasions within a msgA-RACH slot;a PRACH duration in symbols used to indicate a start symbol and a length for a first msgA RACH occasion.25.The wireless communication method of claim 20, wherein the time domain configuration of the first msgA POs in the SBFD symbols / slots is configured to the SBFD aware UEs, and wherein the time domain configuration comprises a starting subframe or slot; a starting symbol; a duration of the first msgA PO; and / or an end symbol within the SBFD symbol / slot.26.The wireless communication method of claim 20, wherein the time domain configuration of the first msgA POs in the SBFD symbols / slots comprises a time offset between the first msgA POs in the SBFD symbols / slots and the second msgA POs in the non-SBFD symbols / slots.27.The wireless communication method of claim 20, wherein in the second configuration, the first msgA ROs and POs in the SBFD symbols / slots are configured separately from the second msgA ROs and POs in the non-SBFD symbols / slots.28.The wireless communication method of claim 27, wherein time domain resources of the first msgA POs and / or ROs in the SBFD symbols / slots are configured for the SBFD symbols / slots using at least one of following parameters:a MsgA PRACH configuration index for the SBFD symbols / slots;a starting subframe or slot;a starting symbol;a duration of first MsgA RO;an end symbol;a time offset between first MsgA RO and PO in the SBFD symbols / slots;a number of slots containing one or multiple PUSCH occasions;an index for valid combinations of start symbol, length, and mapping type (SLIV) for a first MsgA PUSCH occasion.29.The wireless communication method of any one of claims 2 to 19, further comprising requesting the SBFD aware UEs to prioritize a use of the first msgA ROs and POs in the SBFD symbols / slots or a use of the second msgA ROs and POs in the non-SBFD symbols / slots based on predetermined criteria.30.The wireless communication method of claim 29, wherein prioritization is determined based on:a first threshold defined based on the UL power control of MsgA RO, wherein a first MsgA in the SBFD symbols / slots is used if a measured UL power control value is less than or equal to the first threshold, and a second MsgA in the non-SBFD symbols / slots is used if the measured UL power control value exceeds the first threshold; ora second threshold defined based on cross link interference (CLI) -reference signal received power (RSRP) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSRP value is less than or equal to the second threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSRP value exceeds the second threshold; ora third threshold defined based on cross link interference (CLI) -received signal strength indicator (RSSI) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSSI value is less than or equal to the third threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSSI value exceeds the third threshold.31.The wireless communication method of claim 29, wherein prioritization is determined based on configuring a highest priority among available random access opportunities to the UEs.32.The wireless communication method of claim 29, wherein prioritization is determined based on enabling or disabling an initial / random access of MsgA in the SBFD symbols / slots through a higher layer signaling.33.A wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a base station, comprising:performing a configuration of 4-step RACH in SBFD symbols / slots to SBFD aware user equipments (UEs) in a radio resource control (RRC) connected state or a RRC idle / inactive state; andconfiguring at least one uplink (UL) power control parameter to the UEs, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.34.The wireless communication method of claim 33, wherein the at least one UL power control parameter comprises a parameter of preamble received target power and / or a parameter of ΔMsg3_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for UL power control, the parameter of preamble received target power is used to adjust an UL power control for Msg1 and / or Msg3 in the SBFD symbols / slots, the parameter of ΔMsg3_PUSCH is determined from a parameter of Msg3-deltapreamble, and the parameter of Msg3-deltapreamble is a power offset of Msg3 physical uplink shared channel (PUSCH) and is used to adjust the UL power control for Msg3 in the SBFD symbols / slots.35.The wireless communication method of claim 34, wherein the at least one UL power control parameter comprises a preamble received target power, and / or a power offset for the first Msg1 ROs in the SBFD symbols / slots relative to the second Msg1 ROs in the non-SBFD symbols / slots.36.The wireless communication method of claim 34, wherein the at least one UL power control parameter comprises a scaling factor eta (η) , wherein the scaling factor eta (η) scales a preamble received target power of the first Msg1 ROs in the non-SBFD symbols / slots to adjust an UL power control of first Msg1 ROs in the SBFD symbols / slots.37.The wireless communication method of claim 34, wherein the scaling factor eta (η) is determined based on preamble received target power for the first Msg1 ROs in the SBFD symbols / slots and a Msg1 ROs preamble received target power for the second Msg1 ROs in the non-SBFD symbols / slots.38.The wireless communication method of claim 34, wherein the scaling factor eta (η) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots.39.The wireless communication method of claim 34, wherein the scaling factor eta (η) is selected from a range of 1.2, 1.4, 1.6, or 1.8.40.The wireless communication method of claim 37, wherein the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset for the Msg3 in the SBFD symbols / slot, an offset used to adjust the UL power control of the Msg3 in the SBFD symbols / sots, and / or a scaling factor gamma (γ) used to adjust the UL power control of the Msg3 in the SBFD symbols / slots.41.The wireless communication method of claim 40, wherein the offset comprises a power offset for the UEs relative to the UL power control used for Msg3 PUSCH in the non-SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on the power offset.42.The wireless communication method of claim 40, wherein the scaling factor is a single scaling factor gamma (γ) configured to the UEs to adjust the UL power control for the Msg3 PUSCH in the SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on a single scaling factor gamma (γ) .43.The wireless communication method of claim 40, wherein the scaling factor is individual scaling factors γ 1, γ 2, and γ 3 configured to the UEs to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of Msg3 PUSCH in the SBFD symbols / slots.44.A wireless communication method of initial / random access in subband full duplex (SBFD) symbols / slots configured within time division duplex (TDD) downlink (DL) or flexible symbols / slots, executed by a user equipment (UE) , comprising:receiving a configuration 2-step random access channel (RACH) configuration in SBFD symbols / slots to from a base station, wherein the 2-step RACH configuration comprises a first configuration and / or a second configuration, the 2-step RACH configuration is used to configure first message A (msgA) random occasions (ROs) and PUSCH occasions (POs) in SBFD symbols / slots and second msgA ROs and POs in non-SBFD symbols / slots; andbeing configured with at least one parameter to adjust an uplink (UL) power control of the first msgA ROs and POs in the SBFD symbols / slots.45.The wireless communication method of claim 44, wherein the first configuration is a single configuration of both the first msgA ROs and POs in the SBFD symbols / slots and the second msgA ROs and POs in the non-SBFD symbols / slots.46.The wireless communication method of claim 45, wherein in the first configuration, the at least one UL power control parameter comprises at least one parameter used to adjust the UL power control of the first msgA ROs and POs in the SBFD symbols / slots.47.The wireless communication method of claim 46, wherein in the first configuration, the at least one UL power control parameter comprises a preamble received target power, a path loss, and / or a power offset for the first msgA ROs and POs in the SBFD symbols / slots relative to the second msgA ROs and / or POs in the non-SBFD symbols / slots.48.The wireless communication method of claim 46, wherein in the first configuration, the at least one UL power control parameter comprises a scaling factor Beta (β) , wherein the scaling factor Beta (β) scales a msgA preamble received target power to adjust the UL power control of the first msgA ROs and / or POs in the SBFD symbols / slots.49.The wireless communication method of claim 48, wherein the scaling factor Beta (β) is determined based on the msgA preamble received target power for the first msgA ROs and / or POs in the SBFD symbols / slots and a msgA preamble received target power for the second msgA ROs and / or POs in the non-SBFD symbols / slots.50.The wireless communication method of claim 48, wherein the scaling factor Beta (β) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots.51.The wireless communication method of claim 50, wherein the scaling factor Beta (β) is selected from a range of 1.2, 1.4, 1.6, or 1.8.52.The wireless communication method of any one of claims 45 to 51, wherein in the first configuration, the at least one UL power control parameter comprises a parameter of msgA-preamble received target power and / or a parameter of ΔMsgA_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for the UL power control, the parameter of msgA-preamble received target power is used to adjust the UL power control for the first msgA ROs in the SBFD symbols / slots, the parameter of ΔMsgA_PUSCH is determined from a parameter of msgA-delta preamble, and the parameter of msgA-delta preamble is a power offset of msgA physical uplink shared channel (PUSCH) and is used to adjust the UL power control for the first msgA POs in the SBFD symbols / slots.53.The wireless communication method of claim 51, wherein in the first configuration, when the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset and a closed loop power control for the first msgA POs in the SBFD symbols / slots.54.The wireless communication method of claim 52, wherein in the first configuration, the at least one UL power control parameter comprises an offset used to adjust the UL power control of the first msgA POs in the SBFD symbols / slots.55.The wireless communication method of claim 54, wherein the offset comprises power offsets in terms of values for the UEs relative to the UL power control used for second msgA POs in the non-SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the power offset.56.The wireless communication method of claim 52, wherein in the first configuration, the at least one UL power control parameter comprises offset values for the P0-PUSCH-alpha set and a closed-loop power control in the non-SBFD symbols / slots, the offset values for P0, alpha, and a closed-loop index are adjusted individually, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated by mathematically operating the offset values with the values of P0, alpha, and the closed-loop index in the non-SBFD symbols.57.The wireless communication method of claim 52, wherein in the first configuration, the at least one UL power control parameter comprises a scaling factor to adjust the UL power control of the first msgA POs in SBFD symbols / slots.58.The wireless communication method of claim 57, wherein the scaling factor is a single scaling factor (sigma σ) configured to adjust the UL power control for the first msgA POs in the SBFD symbols / slots, and the UL power control for the first msgA POs in the SBFD symbols / slots is calculated based on the single scaling factor (sigma σ) .59.The wireless communication method of claim 57, wherein the scaling factor is individual scaling factors σ1, σ2, and σ3 configured to the UE to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of the first msgA POs in the SBFD symbols / slots.60.The wireless communication method of claim 44, wherein the second configuration is two separate configurations comprising one configuration for the first msgA ROs and POs in the SBFD symbols / slots and another configuration for the second msgA ROs and POs in the non-SBFD symbols / slots.61.The wireless communication method of claim 60, wherein in the second configuration, the one configuration comprises a parameter of msgA-ConfigCommon used to configure the first msgA ROs and POs in the SBFD symbols / slots, and the another configuration comprises a parameter of msgA-ConfigCommon used to configure the second msgA ROs and POs in the non-SBFD symbols / slots.62.The wireless communication method of claim 61, wherein in the second configuration, the parameters of msgA-ConfigCommon, comprises:the parameter of msgA preamble received target power for the UL power control of the first msgA ROs in the SBFD symbols / slots; andthe parameters of msgA Delta preamble, P0, alpha and / or closed loop index for the UL power control of the first msgA POs in the SBFD symbols / slots.63.The wireless communication method of claim 44, further comprising:receiving a time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through an indication or a derivation mechanism.64.The wireless communication method of claim 63, wherein receiving the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises:receiving an indication of the time domain configuration of the first msgA ROs in the SBFD symbols / slots using a single physical random channel access (PRACH) configuration index.65.The wireless communication method of claim 64, wherein the PRACH configuration index provides an indication of sub-frames, slots, and / or symbols where a physical random channel access (RACH) is configured in both the SBFD symbols / slots and the non-SBFD symbols / slots, the PRACH configuration index is applicable to the SBFD aware UEs and indicates sub-frames, slots, and / or or symbols where an SBFD operation is configured in at least one of downlink (DL) , UL, DL (DUD) subbands, DL, UL (DU) subbands, or UL, DL (UD) subbands.66.The wireless communication method of claim 63, wherein receiving the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots through the indication or the derivation mechanism comprises:receiving the time domain configuration of the first msgA ROs and POs in the SBFD symbols / slots via a higher layer signaling.67.The wireless communication method of claim 66, wherein the time domain configuration of the first msgA ROs in the SBFD symbols / slots comprises at least one of following parameters:a frame number or sub-frame numbers used to indicate where the first msgA RO is configured within the SBFD symbols / slots;a starting symbol within a slot configured according to a starting duration of a SBFD operation within the slot;a number of msgA PRACH slots within a sub-frame based on a duration of the SBFD operation;a number of time-domain RACH occasions within a msgA-RACH slot;a PRACH duration in symbols used to indicate a start symbol and a length for a first msgA RACH occasion.68.The wireless communication method of claim 63, wherein the time domain configuration of the first msgA POs in the SBFD symbols / slots is configured to the SBFD aware UEs, and wherein the time domain configuration comprises a starting subframe or slot; a starting symbol; a duration of the first msgA PO; and / or an end symbol within the SBFD symbol / slot.69.The wireless communication method of claim 63, wherein the time domain configuration of the first msgA POs in the SBFD symbols / slots comprises a time offset between the first msgA POs in the SBFD symbols / slots and the second msgA POs in the non-SBFD symbols / slots.70.The wireless communication method of claim 63, wherein in the second configuration, the first msgA ROs and POs in the SBFD symbols / slots are configured separately from the second msgA ROs and POs in the non-SBFD symbols / slots.71.The wireless communication method of claim 70, wherein time domain resources of the first msgA POs and / or ROs in the SBFD symbols / slots are configured for the SBFD symbols / slots using at least one of following parameters:a MsgA PRACH configuration index for the SBFD symbols / slots;a starting subframe or slot;a starting symbol;a duration of first MsgA RO;an end symbol;a time offset between first MsgA RO and PO in the SBFD symbols / slots;a number of slots containing one or multiple PUSCH occasions;an index for valid combinations of start symbol, length, and mapping type (SLIV) for a first MsgA PUSCH occasion.72.The wireless communication method of any one of claims 45 to 62, wherein the SBFD aware UEs prioritize a use of the first msgA ROs and POs in the SBFD symbols / slots or a use of the second msgA ROs and POs in the non-SBFD symbols / slots based on predetermined criteria.73.The wireless communication method of claim 72, wherein prioritization is determined based on:a first threshold defined based on the UL power control of MsgA RO, wherein a first MsgA in the SBFD symbols / slots is used if a measured UL power control value is less than or equal to the first threshold, and a second MsgA in the non-SBFD symbols / slots is used if the measured UL power control value exceeds the first threshold; ora second threshold defined based on cross link interference (CLI) -reference signal received power (RSRP) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSRP value is less than or equal to the second threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSRP value exceeds the second threshold; ora third threshold defined based on cross link interference (CLI) -received signal strength indicator (RSSI) measurements in the SBFD symbols / slots, wherein the first MsgA in the SBFD symbols / slots is used if a measured CLI-RSSI value is less than or equal to the third threshold, and the second MsgA in the non-SBFD symbols / slots is used if the measured CLI-RSSI value exceeds the third threshold.74.The wireless communication method of claim 72, wherein prioritization is determined based on configuring a highest priority among available random access opportunities to the UEs.75.The wireless communication method of claim 72, wherein prioritization is determined based on enabling or disabling an initial / random access of MsgA in the SBFD symbols / slots through a higher layer signaling.76.A wireless communication method of initial / random access using subband full duplex (SBFD) symbols / slots configured within TDD DL or flexible symbols / slots, executed by a user equipment (UE) , comprising:receiving a configuration of 4-step RACH in SBFD symbols / slots; andbeing configured with at least one uplink (UL) power control parameter, wherein the at least one UL power control parameter is used to adjust an UL power control of a first message 1 (Msg1) ROs and / or a message 3 (Msg3) POs in the SBFD symbols / slots relative to an UL power control of second Msg1 ROs and / or Msg3 POs in the non-SBFD symbols / slots.77.The wireless communication method of claim 76, wherein the at least one UL power control parameter comprises a parameter of preamble received target power and / or a parameter of ΔMsg3_PUSCH, the parameter of P0-PUSCH-aplha set refers to a set of values in dbm containing P0 values and alpha values for UL power control, the parameter of preamble received target power is used to adjust an UL power control for Msg1 and / or Msg3 in the SBFD symbols / slots, the parameter of ΔMsg3_PUSCH is determined from a parameter of Msg3-deltapreamble, and the parameter of Msg3-deltapreamble is a power offset of Msg3 physical uplink shared channel (PUSCH) and is used to adjust the UL power control for Msg3 in the SBFD symbols / slots.78.The wireless communication method of claim 77, wherein the at least one UL power control parameter comprises a preamble received target power, and / or a power offset for the first Msg1 ROs in the SBFD symbols / slots relative to the second Msg1 ROs in the non-SBFD symbols / slots.79.The wireless communication method of claim 77, wherein the at least one UL power control parameter comprises a scaling factor eta (η) , wherein the scaling factor eta (η) scales a preamble received target power of the first Msg1 ROs in the non-SBFD symbols / slots to adjust an UL power control of first Msg1 ROs in the SBFD symbols / slots.80.The wireless communication method of claim 77, wherein the scaling factor eta (η) is determined based on preamble received target power for the first Msg1 ROs in the SBFD symbols / slots and a Msg1 ROs preamble received target power for the second Msg1 ROs in the non-SBFD symbols / slots.81.The wireless communication method of claim 77, wherein the scaling factor eta (η) is configured to the UEs based on a cross-link interference (CLI) measured in the SBFD symbols / slots.82.The wireless communication method of claim 77, wherein the scaling factor eta (η) is selected from a range of 1.2, 1.4, 1.6, or 1.8.83.The wireless communication method of claim 80, wherein the at least one UL power control parameter comprises the parameter of P0-PUSCH-alphaset for the Msg3 in the SBFD symbols / slot, an offset used to adjust the UL power control of the Msg3 in the SBFD symbols / sots, and / or a scaling factor gamma (γ) used to adjust the UL power control of the Msg3 in the SBFD symbols / slots.84.The wireless communication method of claim 83, wherein the offset comprises a power offset for the UEs relative to the UL power control used for Msg3 PUSCH in the non-SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on the power offset.85.The wireless communication method of claim 83, wherein the scaling factor is a single scaling factor gamma (γ) configured to the UEs to adjust the UL power control for the Msg3 PUSCH in the SBFD symbols / slots, and the UL power control for the Msg3 PUSCH in the SBFD symbols / slots is calculated based on a single scaling factor gamma (γ) .86.The wireless communication method of claim 83, wherein the scaling factor is individual scaling factors γ 1, γ 2, and γ 3 configured to the UEs to adjust P0 of the P0-PUSCH-alphaset, alpha of the P0-PUSCH-alphaset, and the closed-loop index, respectively, for the UL power control of Msg3 PUSCH in the SBFD symbols / slots.87.A base station, comprising:a memory;a transceiver; anda processor coupled to the memory and the transceiver;wherein the base station is configured to perform the method of any one of claims 1 to 43.88.A user equipment (UE) , comprising:a memory;a transceiver; anda processor coupled to the memory and the transceiver;wherein the UE is configured to perform the method of any one of claims 44 to 86.
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