Random access method and device

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to a random access method and device. In one aspect, there is provided a method performed by user equipment (UE), which includes receiving, from a base station, configuration information including random access configuration information associated with subband full duplex (SBFD); determining a valid physical random access channel (PRACH) occasion from PRACH occasions obtained based on the random access configuration information associated with SBFD; and transmitting, to the base station, a PRACH based on the valid PRACH occasion.

Description

RANDOM ACCESS METHOD AND DEVICE

[0001] The present disclosure relates to the field of wireless communication, and more particularly relates to a random access method and device.

[0002] 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6GHz" bands such as 3.5GHz, but also in "Above 6GHz" bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] In order to enhance the coverage of 5G wireless communication system or reduce the system delay, some communication systems adopt special duplex mode: for example, in TDD frequency band (or unpaired spectrum), the method of cross-division duplex (XDD) is adopted. Or, for another example, the method of subband non-overlapping full duplex (SBFD, or called "subband full duplex") is adopted. Subband non-overlapping full duplex means that the bandwidth of a base station (for example, carrier bandwidth) can be divided into more subbands than one. Wherein, the uplink and downlink ratios between the more subbands may be different. This has the effect that the base station can flexibly change the uplink / downlink ratio of a part of the bandwidth, for example, allocate it as full uplink (or full downlink), or the uplink ratio is large / downlink ratio is large. Therefore, the uplink / downlink transmission occasions of the UE in the time domain are increased, thereby enhancing the uplink coverage capability of the UE or reducing the time delay. In such kind of communication system, how to perform random access transmission in combination with the emerging uplink resources through subband non-overlapping full duplex is a problem to be solved. In addition, this disclosure can also solve other problems related to the SBFD system, such as but not limited to: random access configuration, random access resource determination, SSB to RO (SSB-RO) mapping, random access feedback reception and so on in the SBFD system. In addition, the present disclosure can also deal with problems related to random access in systems that has configured random access resources for other features, such as network energy saving (NES). Moreover, the problems that can be solved by this disclosure are not limited to those mentioned in the above and the following description, but can also solve all problems that can be actually solved according to the essence of the technology of this disclosure.

[0009] According to an embodiment of the present disclosure, there is provided a method performed by user equipment (UE) in a communication system, comprising:

[0010] receiving configuration information for random access, wherein the configuration information for random access includes first configuration information related to normal random access and second configuration information related to second random access, the second random access is related to a second feature, and the second configuration information includes at least one of: configuration information of uplink ( UL) subband resource related to a second feature, and information related to configuration of the second random access;

[0011] determining valid ROs from random access occasions (ROs) obtained based on the configuration information of UL subband resource;

[0012] obtaining a mapping of at least one first downlink reference signal to the valid ROs;

[0013] performing random access using a first downlink reference signal selected from the at least one first downlink reference signal and a corresponding valid RO.

[0014] In an implementation, the second random access comprises random access for subband full duplex SBFD,

[0015] wherein, the configuration information of subband resource includes time domain resource configuration and / or frequency domain resource configuration corresponding to SBFD UL subband.

[0016] In an implementation, wherein the information related to configuration of the second random access includes at least one of:

[0017] configuration information for the second random access;

[0018] indication information of sharing configuration of normal random access.

[0019] In an implementation, the configuration information for the second random access includes at least one of:

[0020] a configuration index for the second random access;

[0021] a number of frequency domain ROs for the second random access;

[0022] frequency domain start location of ROs for the second random access;

[0023] a preamble root sequence index for the second random access;

[0024] a number of preambles for the second random access;

[0025] power related configuration for the second random access.

[0026] In an implementation, the power related configuration for the second feature includes at least one of: a path loss compensation coefficient related to the second feature, a preamble target received power, a power increasing delta value, a power ramping priority and / or step size related to the second feature.

[0027] In an implementation, the second random access comprises random access for subband full duplex SBFD, and the valid ROs comprise at least one of:

[0028] a RO in uplink part in TDD configuration;

[0029] a RO not earlier than a first downlink reference signal corresponding to a located slot;

[0030] a RO with distance from a last downlink symbol on the located slot or a last symbol corresponding to the first downlink reference signal on the located slot greater than or equal to a first threshold value;

[0031] a RO with all symbols being SBFD symbols;

[0032] a RO with all symbols being SBFD symbols or flexible symbols;

[0033] a RO with an interval between a first symbol and a last SBFD symbol in a slot corresponding to the first symbol not less than a second threshold value;

[0034] a RO with at least one frequency domain unit or all frequency domain units in uplink subband of SBFD.

[0035] In an implementation, the mapping is obtained based on the synchronization signal and physical broadcast signal block (SSB)-to-RO mapping ratio in the first configuration information and the valid ROs.

[0036] According to an embodiment of the present disclosure, there is provided a method performed by UE in a communication system, comprising:

[0037] receiving configuration information of random access resource, wherein the random access resource includes random access resource related to a second random access, the second random access is related to a second feature;

[0038] performing random access by using the random access resource,

[0039] wherein, the configuration information of random access resource includes at least one of:

[0040] a first downlink reference signal index and an index of mapped RO, wherein the mapped RO includes a second type RO corresponding to the second random access and / or a first type RO corresponding to a normal random access;

[0041] RO index indication, the RO includes the second type RO and / or the first type RO;

[0042] a dedicated preamble index;

[0043] dedicated RNTI;

[0044] preamble transmission resource configuration.

[0045] In an implementation, the configuration information of random access resource is received through at least one of:

[0046] a PDCCH order;

[0047] a MAC control element;

[0048] RRC high-layer signaling.

[0049] In an implementation, the second random access comprises random access for SBFD, the first downlink reference signal index, the index of mapped RO, or a RO index corresponding to the RO index indication correspond to a first time span, wherein the first time span includes at least one of:

[0050] a mapping cycle of first downlink reference signal-RO, an association period of first downlink reference signal-RO, an association pattern period of first downlink reference signal-RO, a mapping cycle of first downlink reference signal-SBFD RO, an association period of first downlink reference signal- SBFD RO, an association pattern period of first downlink reference signal-SBFD RO, a predetermined number of time units, random access configuration period, TDD pattern configuration period, and SBFD configuration period.

[0051] In an implementation, wherein if the SBFD configuration period is different from the first time span, a RO indicated by the RO index indication is determined based on a number of ROs in the first time span.

[0052] In an implementation, wherein if a number of RO indexes corresponding to the RO index indication is greater than or equal to a number of ROs in the first time span, the RO corresponding to the RO index indication is determined in the first time span in a cycle manner.

[0053] In an implementation, the preamble transmission resource configuration comprises at least one of:

[0054] a time unit interval, to indicate an interval between the preamble transmission resource and a time when indication of the random access resource is received;

[0055] a start symbol of a RO;

[0056] a preamble format index;

[0057] a number of time domain and / or frequency domain resources occupied by a RO;

[0058] a preamble root sequence index;

[0059] a preamble length;

[0060] subcarrier spacing of a preamble;

[0061] a period of preamble transmission resource.

[0062] In an implementation, the RO is a valid RO, a valid SBFD RO, or a configured RO.

[0063] In an implementation, if a RO determined based on the configuration information of random access resource conflicts with other transmissions, transmission of a preamble on the RO is cancelled.

[0064] In an implementation, the method further comprises: detecting feedback from the base station using a first RNTI,

[0065] wherein, the first RNTI includes at least one of:

[0066] RA-RNTI obtained based on the configured RO frequency domain index;

[0067] RA-RNTI obtained based on a feature index or a feature group index;

[0068] RA-RNTI obtained based on a predetermined RO symbol index;

[0069] C-RNTI；

[0070] a configured dedicated RNTI.

[0071] In an implementation, the configured RO frequency domain index includes at least one of:

[0072] a frequency domain index of the first RO of the UE;

[0073] a frequency domain index of the last RO of the UE;

[0074] frequency domain indexes of each RO of the UE.

[0075] In an implementation, if the random access configuration index of the second random access is the same as the random access configuration index of the normal random access, or the time unit corresponding to the RO for random access by the UE also includes ROs for other features, detecting the feedback from the base station by using the RA-RNTI obtained based on the frequency domain index of the configured ROs.

[0076] In an implementation, the UE detects feedback from the base station in a first resource, the first resource includes at least one of:

[0077] a control resource set dedicated to UE supporting the second random access or dedicated to the second random access;

[0078] a search space dedicated to UE supporting the second random access or dedicated to the second random access;

[0079] a time window dedicated to UE supporting the second random access or dedicated to the second random access.

[0080] According to an embodiment of the present disclosure, there is provided a method performed by a base station in a communication system, comprising:

[0081] transmitting configuration information for random access, wherein the configuration information for random access includes first configuration information related to normal random access and second configuration information related to second random access, and the second configuration information includes at least one of: configuration information of uplink (UL) subband resource related to second feature and configuration information related to second random access;

[0082] receiving a random access signal transmitted by UE,

[0083] wherein the random access signal is transmitted by the UE using a first downlink reference signal selected from at least one first downlink reference signal and a corresponding valid RO,

[0084] wherein, the corresponding valid RO is a valid RO among random access occasions obtained based on the configuration information of UL subband resource,

[0085] the at least one first downlink reference signal is mapped to the valid RO.

[0086] In an implementation, the second random access comprises random access for subband full duplex SBFD,

[0087] wherein, the configuration information of subband resource includes time domain resource configuration and / or frequency domain resource configuration corresponding to SBFD UL subband.

[0088] In an implementation, wherein the information related to configuration of the second random access includes at least one of:

[0089] configuration information for the second random access;

[0090] indication information of sharing configuration of normal random access.

[0091] In an implementation, the configuration information for the second random access includes at least one of:

[0092] a configuration index for the second random access;

[0093] a number of frequency domain ROs for the second random access;

[0094] frequency domain start location of ROs for the second random access;

[0095] a preamble root sequence index for the second random access;

[0096] a number of preambles for the second random access;

[0097] power related configuration for the second random access.

[0098] In an implementation, the power related configuration for the second feature includes at least one of: a path loss compensation coefficient related to the second feature, a preamble target received power, a power increasing delta value, a power ramping priority and / or step size related to the second feature.

[0099] In an implementation, the second random access comprises random access for subband full duplex SBFD, and the valid ROs comprise at least one of:

[0100] a RO in uplink part in TDD configuration;

[0101] a RO not earlier than a first downlink reference signal corresponding to a located slot;

[0102] a RO with distance from a last downlink symbol on the located slot or a last symbol corresponding to the first downlink reference signal on the located slot greater than or equal to a first threshold value;

[0103] a RO with all symbols being SBFD symbols;

[0104] a RO with all symbols being SBFD symbols or flexible symbols;

[0105] a RO with an interval between a first symbol and a last SBFD symbol in a slot corresponding to the first symbol not less than a second threshold value;

[0106] a RO with at least one frequency domain unit or all frequency domain units in uplink subband of SBFD.

[0107] In an implementation, the mapping is obtained based on the synchronization signal and physical broadcast signal block (SSB)-to-RO mapping ratio in the first configuration information and the valid ROs.

[0108] According to an embodiment of the present disclosure, there is provided a method performed by a base station in a communication system, comprising:

[0109] transmitting configuration information of random access resource, wherein the random access resource includes random access resource related to a second random access, the second random access is related to a second feature;

[0110] receiving a random access signal transmitted using the random access resource,

[0111] wherein, the configuration information of random access resource includes at least one of:

[0112] a first downlink reference signal index and an index of mapped RO, wherein the mapped RO includes a second type RO corresponding to the second random access and / or a first type RO corresponding to a normal random access;

[0113] RO index indication, the RO includes the second type RO and / or the first type RO;

[0114] a dedicated preamble index;

[0115] dedicated RNTI;

[0116] preamble transmission resource configuration.

[0117] In an implementation, the configuration information of random access resource is transmitted through at least one of:

[0118] a PDCCH order;

[0119] a MAC control element;

[0120] RRC high-layer signaling.

[0121] In an implementation, the second random access comprises random access for SBFD, the first downlink reference signal index, the index of mapped RO, or a RO index corresponding to the RO index indication correspond to a first time span, wherein the first time span includes at least one of:

[0122] a mapping cycle of first downlink reference signal-RO, an association period of first downlink reference signal-RO, an association pattern period of first downlink reference signal-RO, a mapping cycle of first downlink reference signal-SBFD RO, an association period of first downlink reference signal- SBFD RO, an association pattern period of first downlink reference signal-SBFD RO, a predetermined number of time units, random access configuration period, TDD pattern configuration period, and SBFD configuration period.

[0123] In an implementation, wherein if the SBFD configuration period is different from the first time span, a RO indicated by the RO index indication is determined based on a number of ROs in the first time span.

[0124] In an implementation, wherein if a number of RO indexes corresponding to the RO index indication is greater than or equal to a number of ROs in the first time span, the RO corresponding to the RO index indication is determined in the first time span in a cycle manner.

[0125] In an implementation, the preamble transmission resource configuration comprises at least one of:

[0126] a time unit interval, to indicate an interval between the preamble transmission resource and a time when indication of the random access resource is received;

[0127] a start symbol of a RO;

[0128] a preamble format index;

[0129] a number of time domain and / or frequency domain resources occupied by a RO;

[0130] a preamble root sequence index;

[0131] a preamble length;

[0132] subcarrier spacing of a preamble;

[0133] a period of preamble transmission resource.

[0134] In an implementation, the RO is a valid RO, a valid SBFD RO, or a configured RO.

[0135] In an implementation, if a RO determined based on the configuration information of random access resource conflicts with other transmissions, transmission of a preamble on the RO is cancelled.

[0136] In an implementation, the method further comprises: transmitting feedback to UE using a first RNTI,

[0137] wherein, the first RNTI includes at least one of:

[0138] RA-RNTI obtained based on the configured RO frequency domain index;

[0139] RA-RNTI obtained based on a feature index or a feature group index;

[0140] RA-RNTI obtained based on a predetermined RO symbol index;

[0141] C-RNTI；

[0142] a configured dedicated RNTI.

[0143] In an implementation, the configured RO frequency domain index includes at least one of:

[0144] a frequency domain index of the first RO of the UE;

[0145] a frequency domain index of the last RO of the UE;

[0146] frequency domain indexes of each RO of the UE.

[0147] According to an embodiment of the present disclosure, there is provided a UE in a communication system, comprising:

[0148] a transceiver configured to transmit and / or receive signals;

[0149] a controller configured to control the UE to perform the method according to the embodiments of the present disclosure.

[0150] According to an embodiment of the present disclosure, there is provided a base station in a communication system, comprising:

[0151] a transceiver configured to transmit and / or receive signals;

[0152] a controller configured to control the base station to perform the method according to the embodiments of the present disclosure.

[0153] In an embodiment of the present invention, a method and device for resource determination and signal transmission for random access will be introduced. Such method is beneficial for UE to combine newly configured random access resources for random access procedure in some scenarios, for example, in a network system supporting SBFD, the UE has new random access resources on the symbol of SBFD, and at the same time, there are random access resources configured in a legacy way (for example, random access resources for four-step random access, etc.), how to perform random access in such case.

[0154] FIG. 1 illustrates an example wireless network according to various embodiments of the present disclosure;

[0155] FIG. 2a illustrates an example wireless transmission path according to the present disclosure;

[0156] FIG. 2b illustrates an example wireless reception path according to the present disclosure;

[0157] FIG. 3a illustrates an example user equipment according to the present disclosure and FIG. 3b illustrates an example base station according to the present disclosure; and

[0158] FIG. 4 illustrates a schematic diagram of a 4-step random access procedure;

[0159] FIG. 5 illustrates an example diagram of configuration of SBFD;

[0160] FIG. 6 illustrates an example diagram for determining the mapping from SSB to SBFD RO;

[0161] FIG. 7 illustrates an example diagram of RO indexes within a certain time period span;

[0162] FIG. 8 illustrates an example diagram when the SBFD configuration period and a certain time period do not match;

[0163] FIG. 9 illustrates a schematic structural diagram of user equipment according to at least one embodiment of the present disclosure;

[0164] FIG. 10 illustrates a schematic structural diagram of a network device (e.g., a base station) according to at least one embodiment of the present disclosure.

[0165] The following description with reference to the accompanying drawings is provided to facilitate a comprehensive understanding of various embodiments of the present disclosure defined by the claims and their equivalents. This description includes various specific details to facilitate understanding but should only be considered as exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of well-known functions and structures may be omitted.

[0166] The terms and expressions used in the following specification and claims are not limited to their dictionary meanings, but are only used by the inventors to enable a clear and consistent understanding of the present disclosure. Therefore, it should be obvious to those skilled in the art that the following descriptions of various embodiments of the present disclosure are provided for illustration purposes only and are not intended to limit the purposes of the present disclosure as defined in the appended claims and their equivalents.

[0167] It should be understood that singular forms of "a", "an" and "the" include plural referents unless the context clearly indicates otherwise. Thus, for example, a reference to a "component surface" includes a reference to one or more such surfaces.

[0168] The terms "include" or "may include" refer to the existence of a corresponding disclosed function, operation or component that can be used in various embodiments of the present disclosure, and do not limit the existence of one or more additional functions, operations or features. In addition, the terms "including" or "having" can be interpreted as indicating certain characteristics, numbers, steps, operations, constituent elements, components or combinations thereof, but should not be interpreted as excluding the possibility of the existence of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0169] The term "or" used in various embodiments of the present disclosure includes any of the listed terms and all combinations thereof. For example, "a or b" may include a, may include b, or may include both a and b.

[0170] Unless defined differently, all terms (including technical terms or scientific terms) used in this disclosure have the same meaning as those understood by those skilled in the art in this disclosure. Common terms, as defined in dictionaries, are interpreted as having meanings consistent with the context in the relevant technical fields, and should not be interpreted in an idealized or overly formal way unless explicitly defined in this disclosure.

[0171] The technical solution of the embodiment of the application can be applied to various communication systems, such as the Global System for Mobile Communications (GSM) system, code division multiple access (CDMA), CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunications system (, UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5th generation (5G) system or new radio (NR), etc. In addition, the technical solution of the embodiment of the application can be applied to future-oriented communication technologies.

[0172] FIG. 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0173] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data networks.

[0174] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0175] gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0176] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0177] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0178] Although FIG. 1 illustrates an example of the wireless network 100, various changes can be made to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0179] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0180] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0181] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0182] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0183] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0184] Each of the components in FIGs. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0185] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0186] Although FIGs. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2a and 2b. For example, various components in FIGs. 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0187] FIG. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0188] The UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a transmit (TX) processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. The UE 116 also includes a speaker 306, a controller / processor 307, an input / output (I / O) interface 308, an input device (s) 309, a display 310 and a memory 311. The memory 311 includes an operating system (OS)312 and one or more applications 313.

[0189] The RF transceiver 302 receives an incoming RF signal transmitted by the gNB of the wireless network 100 from the antenna 301. The RF transceiver 302 downconverts an incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 305, which generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 305 transmits the processed baseband signal to speaker 306 (such as for voice data) or to controller / processor 307 (such as for network browsing data) for further processing.

[0190] TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as network data, e-mail or interactive video game data) from controller / processor 307. TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives an outgoing processed baseband or IF signal from the TX processing circuit 303, and upconverts the baseband or IF signal into an RF signal transmitted via the antenna 301.

[0191] The controller / processor 307 can include one or more processors or other processing devices and execute the OS 312 stored in the memory 311 in order to control the overall operation of the UE 116. For example, the controller / processor 307 can control the reception of the forward channel signal and the transmission of the reverse channel signal through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor or microcontroller.

[0192] The controller / processor 307 can also execute other processes and programs residing in the memory 311, such as operations for channel quality measurement and reporting of a system having a 2D antenna array as described in the embodiment of the present disclosure. The controller / processor 307 can move data into or out of the memory 311 as needed to execute the process. In some embodiments, the controller / processor 307 is configured to execute the application 313 based on the OS 312 or in response to a signal received from a gNB or an operator. The controller / processor 307 is also coupled to an I / O interface 308, which provides the UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 308 is a communication path between these accessories and controller / processor 307.

[0193] The controller / processor 307 is also coupled to the input device (s) 309 and a display 310. An operator of the UE 116 can input data into the UE 116 using the input device (s) 309. The display 310 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics, such as from a website. The memory 311 is coupled to the controller / processor 307. A part of the memory 311 can include random access memory (RAM), and another part of the memory 311 can include flash memory or other read-only memory (ROM).

[0194] Although FIG. 3a shows an example of the UE 116, various changes can be made to FIG. 3a. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific needs. As a specific example, the controller / processor 307 can be divided into a plurality of processors, such as one or more central processing units (CPU) and one or more graphics processing units (GPU). Moreover, although FIG. 3a shows the UE 116 configured as a mobile phone or a smart phone, the UE can be configured to operate as other types of mobile or fixed devices.

[0195] FIG. 3b shows an example gNB 102 according to the present disclosure. The embodiment of the gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 can have the same or similar configurations. However, gNB has various configurations, and FIG. 3b does not limit the scope of the present disclosure to any specific implementation of gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0196] As shown in FIG. 3b, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmit (TX) processing circuit 374 and a receive (RX) processing circuit 376. In some embodiments, one or more of the plurality of antennas 370a-370n comprises a 2D antenna array. GNB 102 also includes controller / processor 378, memory 380 and backhaul or network interface 382.

[0197] RF transceivers 372a-372n receive incoming RF signals from antennas 370a-370n, such as signals transmitted by UE or other GNBs. RF transceivers 372a-372n downconvert incoming RF signals to generate IF or baseband signals. The IF or baseband signal is transmitted to the RX processing circuit 376, which generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0198] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, e-mail or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from the TX processing circuit 374 and upconvert the baseband or IF signal into RF signals transmitted via the antennas 370a-370n.

[0199] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as more advanced wireless communication functions. For example, the controller / processor 378 can perform a BIS process such as that performed by a blind interference sensing (BIS) algorithm, and decode the received signal from which the interference signal is subtracted. The controller / processor 378 may support any of a variety of other functions in the gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0200] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTC. The controller / processor 378 can move data into or out of the memory 380 as needed to execute the process.

[0201] The controller / processor 378 is also coupled to a backhaul or network interface 382. Backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection (s). For example, when the gNB 102 is implemented as part of a cellular communication system, such as one that supports 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow the gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through wired or wireless connections, such as an Ethernet or RF transceiver.

[0202] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include RAM, and another part of the memory 380 can include flash memory or other ROM. In some embodiments, multiple instructions, such as the BIS algorithm, are stored in memory. A plurality of instructions are configured to cause the controller / processor 378 to perform a BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0203] As described in more detail below, the transmit and receive paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0204] Although FIG. 3b shows an example of the gNB 102, various changes can be made to FIG. 3b. For example, gNB 102 can include any number of each component shown in FIG. 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of TX processing circuit 374 and a single instance of RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0205] The time domain unit (also called time unit) in this application can be: an OFDM symbol, an OFDM symbol group (composed of multiple OFDM symbols), a slot, a slot group (composed of multiple slots), a subframe, a subframe group (composed of multiple subframes), a system frame and a system frame group (composed of multiple system frames); it can also be an absolute time unit, such as 1 millisecond, 1 second, etc. A time unit can also be a combination of various granularities, such as N1 slots plus N2 OFDM symbols.

[0206] The frequency domain unit (also called frequency unit) in this application can be: a subcarrier, a subcarrier group (composed of multiple subcarriers), a resource block (RB), which can also be called a physical resource block (PRB), a resource block group (composed of multiple RBs), a bandwidth part (BWP). It can also be an absolute frequency domain unit, such as 1 Hz, 1 kHz, etc. The frequency domain unit can also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0207] Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.

[0208] Text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be construed to limit the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, based on the disclosure herein, it is obvious to those skilled in the art that changes can be made to the illustrated embodiments and examples without departing from the scope of this disclosure.

[0209] It can be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" used herein can also include plural forms unless specifically stated. It should be further understood that the word "comprising" used in the specification of this application refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may also exist. Furthermore, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. As used herein, the phrase "and / or" includes all or any unit and all combinations of one or more associated listed items.

[0210] It can be understood by those skilled in the art that unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms, such as those defined in general dictionaries, should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless they are specifically defined as here.

[0211] It can be understood by those skilled in the technical field that the terms "terminal", "terminal equipment" used herein include both the equipment of wireless signal receiver, which only has the equipment of wireless signal receiver without transmission capability, and the equipment of receiving and transmitting hardware, which has the equipment of receiving and transmitting hardware capable of two-way communication on a two-way communication link. Such devices may include a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; PCs (Personal Communications Service), which can combine voice, data processing, fax and / or data communication capabilities; PDA(Personal Digital Assistant), which may include RF receiver, pager, Internet / Intranet access, web browser, notepad, calendar and / or GPS(Global Positioning System) receiver; a conventional laptop and / or palmtop computer or other device having and / or including a radio frequency receiver. As used herein, "terminal" and "terminal equipment" can be portable, transportable, installed in vehicles (air, sea and / or land), or suitable and / or configured to operate locally, and / or operate in any other location on the earth and / or space in a distributed form. The "terminal" and "terminal equipment" used here can also be communication terminals, internet terminals and music / video playing terminals, such as PDA, mobile internet device (Mobile Internet Device) and / or mobile phone with music / video playing function, as well as smart TV, set-top box and other devices.

[0212] Without departing from the scope of the present invention, the term "transmit" in the present invention can be used interchangeably with "transmission", "report" and "notification".

[0213] Text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be construed to limit the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, based on the disclosure herein, it is obvious to those skilled in the art that changes can be made to the illustrated embodiments and examples without departing from the scope of this disclosure.

[0214] The transmission link of wireless communication system mainly includes: downlink communication link from 5G gNB to User Equipment (UE) and uplink communication link from UE to network.

[0215] Nodes used for positioning measurement in wireless communication systems, such as current wireless communication systems, include: UE that initiates a positioning request message, Location Management Function (LMF) that is for UE positioning and transmitting positioning assistance data, gNB or transmission-reception point (TRP) that broadcasts positioning assistance data and performs uplink positioning measurement, and UE that is for downlink positioning measurement. In addition, the method of the present invention can also be extended to other communication systems, such as automobile communication (V2X), such as sidelink communication, in which the transmitting and receiving point or UE can be any device in V2X.

[0216] Transmission in a wireless communication system includes: transmission from a base station (gNB) to User Equipment (UE) (called downlink transmission), corresponding slots are called downlink slots, transmission from UE to the base station (called uplink transmission), and corresponding slots are called uplink slots.

[0217] In the downlink communication of wireless communication system, the system transmits synchronization signals and broadcast channels to users through synchronization signal / PBCH block (SSB) with periodicity, which is called SSB periodicity, or SSB burst periodicity. At the same time, the base station will configure a physical random access channel (PRACH) configuration period, during which a certain number of random access transmission occasions (also called random access occasions, PRACH transmission occasion, RO) are configured, valid ROs can be obtained through judgment on these configured ROs with certain validity rules; and it is met that all SSBs can be mapped to corresponding valid RO(s) in an association period (a certain time span), and all SSBs within one SSB periodicity can be mapped to the required random access resources in one SSB-to-RO mapping cycle, and there can be one or more mapping cycles in one association period. An SSB to RO association pattern period contains one or more association periods, and the association pattern from SSB to RO in each association pattern period is the same.

[0218] In the New Radio (NR) communication system, before the establishment of Radio Resource Control connection, for example, in random access procedure, the performance of random access directly affects the user's experience. In legacy wireless communication systems, such as LTE, LTE-Advanced, 5G or NR, random access procedure is used in many scenarios, such as initial link establishment, cell handover, re-establishment of uplink, RRC connection reestablishment and so on, and it is divided into contention-based Random Access) and contention-free random access according to whether users monopolize the preamble resources. Because in the contention-based random access, each user selects a preamble sequence from the same preamble sequence resource when trying to establish the uplink, it may appear that multiple users select the same preamble sequence and transmit it to the base station. Thus, contention resolution mechanism is an important research direction in random access, how to reduce the contention probability and how to quickly solve the contention that have occurred are the key indicators that affect the random access performance.

[0219] FIG. 4 shows a schematic diagram of a 4-step random access procedure. For example, contention-based random access procedure is divided into four steps, as shown in FIG. 4. In the first step, the user randomly selects a preamble (also called "preamble sequence" interchangeably herein) from a resource pool of preamble and transmits it to the base station. The base station performs correlation detection on the received signal, thereby identifying the preamble transmitted by the user; in the second step, the base station transmits a Random Access Response (RAR) to the user, including a random access preamble identifier, a timing advance instruction determined according to the time delay estimation between the user and the base station, a cell-radio network temporary identifier (C-RNTI), and time-frequency resources allocated for the user's next uplink transmission; the user should search for the PDCCH with the feedback based on the RA-RNTI associated with the PRACH occasion for transmitting the random access preamble. The RA-RNTI associated with the PRACH occasion (RO) for transmitting the random access preamble is calculated according to the following formula:

[0220] RA-RNTI = 1 + s_id + 14 Х t_id + 14 Х 80 Х f_id + 14 Х 80 Х 8 Х ul_carrier_id,

[0221] where, s_id is the index of the first OFDM symbol of the PRACH occasion (0 ≤ s_id < 14), and t_id is the index of the first slot of the PRACH occasion in the system frame (0 ≤ t_id < 80), wherein for μ = {0, 1, 2, 3}, the subcarrier used to determine t_id is based on the value of μ specified in section 5.3.2 of TS38.211, for μ = {5, 6}, t_id is the index of 120 kHz slot containing the PRACH occasion in the system frame (0 ≤ t_id < 80), f_id is the index of the PRACH occasion in the frequency domain (0 ≤ f_id < 8), and ul_carrier_id is the UL carrier used for transmission of a random access preamble (0 for NUL carrier, and 1 for SUL carrier).

[0222] In the third step, the user transmits a third message (message 3, Msg3) to the base station according to the information in the RAR. Msg3 contains information such as user terminal identification and RRC connection request, where the user terminal identification is unique to the user and is used for contention resolution; in the fourth step, the base station transmits a contention resolution identification to the user, including the identification of the user terminal that won the contention resolution. After detecting its own identification, the user upgrades the temporary C-RNTI to C-RNTI, transmits an ACK signal to the base station to complete the random access procedure, and waits for the scheduling from the base station. Otherwise, the user will start a new random access procedure after a delay.

[0223] For contention-free random access procedure, because the base station knows the user identification, it can assign a preamble to the user. Therefore, when the user transmits a preamble, it does not need to randomly select a sequence, but will use the allocated preamble. After detecting the allocated preamble, the base station will transmit the corresponding random access response, including information such as timing advance and uplink resource allocation. After receiving the random access response, the user thinks that the uplink synchronization has been completed and waits for the further scheduling from the base station. Therefore, contention-free random access procedure only includes two steps: step 1 is to transmit a preamble; step 2 is to transmit the random access response.

[0224] Random access procedure is suitable for the following scenarios:

[0225] 1. Initial access under RRC_IDLE;

[0226] 2. Re-establish RRC connection;

[0227] 3. Cell handover;

[0228] 4. Downlink data arrives in RRC connected state and random access procedure is requested (when the uplink is asynchronous);

[0229] 5. Uplink data arrives in RRC connected state and random access procedure is requested (when the uplink is asynchronous or no resources are allocated to the scheduling request);

[0230] 6. Positioning.

[0231] In order to enhance the coverage of 5G wireless communication system or reduce the system delay, some communication systems adopt special duplex mode: for example, in TDD frequency band (or unpaired spectrum), the method of cross-division duplex (XDD) is adopted. Or, for another example, the method of subband non-overlapping full duplex (SBFD, or called "subband full duplex") is adopted. Subband non-overlapping full duplex means that the bandwidth of a base station (for example, carrier bandwidth) can be divided into more subbands than one. Wherein, the uplink and downlink ratios between the more subbands may be different. This has the effect that the base station can flexibly change the uplink / downlink ratio of a part of the bandwidth, for example, allocate it as full uplink (or full downlink), or the uplink ratio is large / downlink ratio is large. Therefore, the uplink / downlink transmission occasions of the UE in the time domain are increased, thereby enhancing the uplink coverage capability of the UE or reducing the time delay. In such kind of communication system, how to perform random access transmission in combination with the emerging uplink resources through subband non-overlapping full duplex is a problem to be solved. In addition, this disclosure can also solve other problems related to the SBFD system, such as but not limited to: random access configuration, random access resource determination, SSB to RO (SSB-RO) mapping, random access feedback reception and so on in the SBFD system. In addition, the present disclosure can also deal with problems related to random access in systems that has configured random access resources for other features, such as network energy saving (NES). Moreover, the problems that can be solved by this disclosure are not limited to those mentioned in the above and the following description, but can also solve all problems that can be actually solved according to the essence of the technology of this disclosure.

[0232] In an embodiment of the present invention, a method and device for resource determination and signal transmission for random access will be introduced. Such method is beneficial for UE to combine newly configured random access resources for random access procedure in some scenarios, for example, in a network system supporting SBFD, the UE has new random access resources on the symbol of SBFD, and at the same time, there are random access resources configured in a legacy way (for example, random access resources for four-step random access, etc.), how to perform random access in such case. Such method can be extended or replaced by other duplex modes, such as full duplex, etc., and can also be extended or replaced by cases where other features, such as network energy saving has independently configured random access resources. In this disclosure, SBFD is used to explain the solution, but this is only exemplary and is for the convenience of the inventor to fully describe his technical concept and technical principle, and is not intended to limit the principle of this disclosure only to SBFD-related random access.

[0233] It can be understood that although most of the descriptions in this disclosure describe the solution with SBFD-related random access, the principles disclosed in this disclosure can be equally applied to scenarios where random access resources are configured for other features. For example, the technology of the present disclosure can also be applied to a scenario where random access resources are separately configured for network energy saving (NES). Therefore, the present disclosure can be applied to at least a scenario in which random access resources are configured for a specific feature, such as SBFD, NES, etc. For the convenience of description, the random access associated with a specific feature can be called "second random access", the resources configured for the second random access can be called "second type random access resources" (for example, second type RO) and so on, the legacy random access can be called "normal random access" or "first random access" and so on, and the corresponding resources can be called "normal random access resources" (for example, normal RO) or "first type random access resources" (for example, first type RO).

[0234] In the present invention, SSB is described as a downlink reference signal related to random access, but this is only an example, and SSB can also be replaced by other reference signals, such as CSI-RS, PRS, etc.

[0235] The method provided by the invention can include a combination of one or more of the following operations:

[0236] ●UE receives configuration information related to random access transmitted by other node (such as a network device, which may include a base station, etc.), wherein:

[0237] ■The configuration information related to random access includes a combination of one or more of:

[0238] ◆The first type random access configuration information, or called the first configuration information related to normal random access, such as pre-existing or existing random access configuration information, for example, configuration information for four-step random access, configuration information for two-step random access, etc. In the invention, the method is illustrated by taking the configuration of four-step random access as an example, which can be expanded or replaced by random access configuration for other features; wherein, the first type random access configuration information at least includes a random access configuration index, the number of frequency domain ROs for random access, the frequency domain start location of the first RO, the root sequence index of preambles, the number of preambles on one RO, the mapping ratio of SSB-RO (ssbperRO, for example, information about how many SSBs are mapped on one RO), etc. In the description of this disclosure, an RO obtained according to the first type random access configuration information is expressed as a normal RO; in particular, valid normal ROs may be obtained by judgement on the configured normal ROs according to existing validity rules, which is expressed as valid normal ROs; wherein, the existing validity rules include: an RO on a random access slot is valid if it is on the uplink symbol (or uplink part) in TDD configuration; an RO on a random access slot is a valid RO if it is not earlier than SSB on the slot and / or the RO is at least N symbols away from the last downlink symbol and / or the last SSB symbol on the current slot;

[0239] ◆The second type random access configuration information, or called the second configuration information related to the second random access, the second random access is related to a second feature, such as SBFD, NES, etc. but not limited thereto. In this description, SBFD is taken as an example of the second feature for convenience of expression and easy understanding. The second type random access configuration information can also be called, for example, new random access configuration information (or configuration information different from the existing random access configuration information). For example, new SBFD random access configuration information can be obtained through the configuration of SBFD. In this invention, SBFD random access configuration information is used to explain the method, which can be extended to other random access configuration information; wherein, the second type random access configuration information includes at least one of the following:

[0240] ▶ The related configuration of time domain resources in SBFD UL subband, such as the related configuration of SBFD symbols; for example, through the configuration, UE can know the start location of SBFD symbols, the number of SBFD symbols within a time period, and the size of the time period, preferably further including the repetition period of the time period, expressed as an SBFD configuration period, wherein the SBFD configuration period can be the same as the TDD pattern configuration period, or an integer multiple of the TDD pattern configuration period, and / or be the same as the random access related period, or an integer multiple of the random access related period; wherein the random access related period includes at least one of the following: a random access configuration period, a mapping cycle of SSB-RO, an association period of SSB-RO and an association pattern period of SSB-RO; for example, a time period is a slot (expressed as an SBFD slot), the start location of symbol of SBFD starts with symbol 0 in a slot, and the number of SBFD symbols is 6 symbols; if the SBFD configuration period is 10ms, there is an SBFD slot in 10ms, and there are six SBFD symbols starting from symbol 0 in the SBFD slot; it can be expanded to the case where the repetition period is the same as the time period, and / or one repetition period contains multiple SBFD slots, etc.; where SBFD symbols can be replaced by SBFD time units; FIG. 5 shows an example diagram of configuration SBFD.

[0241] ▶ The related configuration of frequency domain resources in SBFD UL subband, for example, through the related configuration information, the UE can obtain the start point of the configured SBFD UL subband in the frequency domain, the number of frequency domain units occupied (for example, the bandwidth of the SBFD UL subband), and / or the end point in the frequency domain;

[0242] ▶ Optionally, the SBFD random access configuration information, including one or more of:

[0243] -Separate SBFD random access configuration information, including one or more of:

[0244] SBFD dedicated random access configuration index; the random access configuration index indicates one or more of: random access preamble format, random access configuration period, number and location of random access frames in the random access configuration period, index of subframe or slot in a random access frame, start symbol location of random access preamble in a subframe or slot, number of random access slots in a random access subframe, number of random access occasions in a random access slot, number of OFDM symbols occupied in a random access occasion;

[0245] SBFD dedicated number of frequency domain ROs for random access;

[0246] SBFD dedicated frequency domain start location for random access; for example, the frequency domain start location of the first RO of SBFD in frequency domain, and other ROs in frequency domain are calculated / derived according to the location of the first RO, the size of frequency domain resources occupied by one RO, and / or the frequency domain gap between ROs;

[0247] SBFD dedicated random access preamble root sequence index;

[0248] SBFD dedicated number of random access preambles, for example, the number of SBFD dedicated preambles on an RO;

[0249] SBFD dedicated power related configuration, including at least one of the following: SBFD dedicated preamble target received power, SBFD dedicated path loss compensation coefficient alpha (for example, alphaХ path loss, when alpha is less than 1, indicating partial path loss compensation; alpha=1, indicating all path loss compensation; alpha>1, indicating excess path loss compensation, such scenario is beneficial to additionally increase the UE's power when transmitting a preamble on SBFD RO when using the normal preamble target received power); SBFD dedicated power increasing delta value, SBFD dedicated power ramping priority and / or step, etc.; when UE uses SBFD RO for preamble transmission, it uses the above-mentioned SBFD dedicated power related configuration; the transmission power P is determined according to one or more of the target received power P0, alphaХ path loss, delta, power ramping stepХ retransmission number;

[0250] -Optionally, the SBFD random access configuration information shares the first type random access configuration information, for example, the SBFD random access configuration information reuses the first type random access configuration information, for example, the random access configuration index of SBFD is the same as the first type random access configuration index, or;

[0251] ●The UE judges whether the configured random access occasions are valid, including one or more of:

[0252] ■For random access occasions configured for SBFD (including SBFD dedicated random access configuration information or when sharing the first type random access configuration information), which is expressed as SBFD RO, one or more of the following validity judgments are used:

[0253] ◆judging SBFD ROs according to the existing validity rules described in the above first type random access configuration information to obtain valid ROs or valid SBFD ROs;

[0254] ▶ In another implementation, when judging the validity of an SBFD RO overlapping with SSB in time domain, the UE obtains information on whether the SBFD RO overlapping with SSB in time domain is valid or not, the information can be obtained through explicit indication or implicit indication, and can adopt one of the following methods:

[0255] -explicit notification, for example, obtaining definite indication information about whether the RO overlapping with SSB in time domain is valid, for example, 1bit indicates the SBFD RO overlapping with SSB in time domain is valid; "0" indicates the SBFD RO overlapping with SSB in time domain is invalid, and vice versa; "1" indicates the SBFD RO overlapping with SSB in time domain is invalid; "0" indicates the SBFD RO overlapping with SSB in time domain is valid;

[0256] -implicit notification, the UE obtains the information on whether the RO overlapping with SSB in time domain is valid in association with obtaining other configuration information, for example, the UE obtains the configuration information on whether the uplink transmission overlapping with SSB in time domain can be performed, and when the UE determines that the uplink transmission overlapping with SSB in time domain can be allowed, the UE determines that the SBFD RO overlapping with SSB in time domain is valid; and vice versa, when the UE determines that uplink transmission overlapping with SSB in time domain is not allowed, the UE determines that SBFD RO overlapping with SSB in time domain is invalid;

[0257] ◆when all symbols of an RO are completely within the SBFD symbols, the RO is a valid RO, or a valid SBFD RO; for example, when part or all of the symbols of an RO are not within the SBFD symbols, the RO is an invalid RO or an invalid SBFD RO;

[0258] ◆when all symbols of an RO are on SBFD symbols and flexible symbols, the RO is a valid RO and a valid SBFD RO; for example, when part or all of the symbols of an RO are not within the SBFD symbols or flexible symbols, the RO is an invalid RO or an invalid SBFD RO;

[0259] ◆when the interval between the first symbol of an RO and the last SBFD symbol in a slot is greater than (or not less than) a time unit interval threshold, the RO is a valid RO; for example, when the interval between (the start location of) the first symbol of an RO and (the end location of) the last SBFD symbol in a slot is not more than (or less than) a time unit interval threshold, the RO is an invalid RO or an invalid SBFD RO;

[0260] ◆when the frequency domain units of an RO are within SBFD UL subband, including all frequency domain units of an RO are within SBFD UL subband, or at least one or X frequency domain units of an RO are within SBFD UL subband; the RO is a valid RO; or a valid SBFD RO; where X is an integer greater than 1.

[0261] ◆when an RO is not mapped to SSB (or other downlink signals) in a certain time period, the RO is an invalid RO; the range of the certain time period includes a mapping cycle, or an association period, or an association pattern period of SSB-RO, a mapping cycle, or an association period, or an association pattern period of SSB-SBFD RO, or a time unit (such as a slot), or a random access configuration period, or a TDD pattern configuration period, or an SBFD configuration period;

[0262] ●The UE maps SSB to valid SBFD random access occasions, including one or more of:

[0263] ■obtaining information related to mapping of SSB-RO according to the first type random access configuration information, including one or more of:

[0264] ◆mapping cycle of SSB-RO

[0265] ◆association period of SSB-RO

[0266] ◆association pattern period of SSB-RO

[0267] ■obtaining information related to mapping of SSB-SBFD RO according to SBFD random access configuration information, including one or more of:

[0268] ◆mapping cycle of SSB-SBFD RO

[0269] ◆association period of SSB-SBFD RO

[0270] ◆association pattern period of SSB-SBFD RO

[0271] ■obtaining the mapping of SSB-SBFD RO according to the first type random access configuration information and the SBFD random access configuration information, including one or more of:

[0272] ◆mapping SSB to the valid SBFD ROs in the association pattern period of SSB-RO, according to the obtained association pattern period of SSB-RO and the mapping ratio of SSB-RO in the first type random access configuration information, and the valid SBFD ROs in the association pattern period of SSB-RO, as illustrated in FIG. 6. In the first type random access configuration, the mapping ratio of SSB to RO is 1:1, for example, one RO is mapped with one SSB, and there are currently two SSB (SSB0, 1), according to there are two valid SBFD ROs in the SSB-RO association pattern period obtained in the first type random access configuration information, these two SSBs are mapped to two valid SBFD ROs correspondingly according to the same mapping ratio;

[0273] ◆mapping SSB to valid SBFD ROs in the association pattern period of SSB-RO, according to the obtained association pattern period of SSB-RO, the mapping ratio of SSB-SBFD RO in SBFD random access configuration information, and the valid SBFD ROs in the association pattern period of SSB-RO;

[0274] ◆according to the obtained association pattern period of SSB-RO and the valid SBFD ROs in the association pattern period of SSB-RO, and the SSB-RO resource list configured by other nodes (network device), each element in the list includes an SSB index and the index of SBFD RO mapped by the SSB index, and the index of SBFD RO is obtained from the logical index of the valid SBFD RO in the association pattern period of SSB-RO;

[0275] ◆When there are remaining SBFD ROs and / or preamble resources which cannot form a complete mapping cycle or association period after an integer number of SSBs are mapped in the above association pattern period, the remaining SBFD ROs and preamble resources are invalid RO resources and / or are not mapped with any SSB;

[0276] ◆The above association pattern period can be replaced by an association period or a mapping cycle, or other time units, such as one or more slots; or one or more random access configuration periods, etc.; or a SBFD configuration period;

[0277] ●The UE selects a random access occasion and a preamble to transmit according to the determined SBFD random access resources and / or the first type random access resources and the SSB selected by the UE or designated;

[0278] ●The UE receives indication of UE dedicated random access resource, and transmits a random access preamble according to the received dedicated random access resource; the receiving indication of UE dedicated random access resource including one or more of:

[0279] ■indication of UE dedicated random access resource obtained by UE according to one or more of the following ways:

[0280] ◆PDCCH commands (such as PDCCH order)

[0281] ◆MAC control element (MAC CE)

[0282] ◆RRC high-layer signaling

[0283] ■the indication of UE dedicated random access resource includes one or more of:

[0284] ◆SSB index, and RO (SBFD RO and / or the first type RO) index mapped by the SSB index;

[0285] ▶ wherein, the RO index mapped by the SSB index may include the index of the SBFD RO mapped by the SSB (for example, excluding the first type RO), or the index of the first type RO mapped by the SSB (for example, excluding the SBFD RO), or the common indexes of the SBFD RO and the first type RO mapped by the SSB; and / or,

[0286] ▶ wherein, the index is obtained within a certain time period span, the certain time period span includes a mapping cycle, or an association period, or association pattern period of SSB-RO, a mapping cycle, or an association period, or an association pattern period of SSB-SBFD RO, or a time unit (such as a slot), or a random access configuration period, or a TDD pattern configuration period, or an SBFD configuration period; and / or,

[0287] ▶ wherein, the RO index mapped by the SSB index can be one or multiple RO indexes, and it can be of an odd number or an even number of indexes;

[0288] ◆RO index indication, for example, index of SBFD RO and / or the first type RO within a certain time period span; wherein,

[0289] ▶ the certain time period span includes

[0290] -random access related period, such as a mapping cycle, or an association period, or association pattern period of SSB-RO, a mapping cycle, or an association period, or association pattern period of SSB-SBFD RO, or a time unit (such as a slot), or a random access configuration period, or

[0291] -a TDD pattern configuration period, or

[0292] -a SBFD configuration period; as shown in FIG. 7, taking the SSB-RO association pattern period as an example, FIG. 7 shows an example diagram of the RO indexes within a certain time period span; and / or,

[0293] ▶ the RO index may be a time domain separate index; or a frequency domain separate index, or a time-frequency two-dimensional joint index;

[0294] ▶ wherein, the RO index can be

[0295] -index of a single RO, or

[0296] -indexes of N consecutive ROs, (N is a positive integer);

[0297] -index of the first (e.g., start) RO of N consecutive ROs; the subsequent N-1 ROs can be obtained in turn;

[0298] ▶ Especially, when the SBFD configuration period does not match the certain time period (for example, the SBFD configuration period is different from the certain time period, for example, the SBFD period is greater than or less than the certain time period), there may be (more) SBFD ROs in some of the certain time periods, while there are no (or less) SBFD ROs in other certain time periods, for example, the number of ROs included in one certain time period (including normal ROs and / or SBFD ROs) may be different from that included in another certain time period;

[0299] -ROs corresponding to the indexes of ROs are determined separately according to the number of ROs in each of the certain time periods. For example, as shown in FIG. 8, if the certain time period is 10ms and the SBFD configuration period is 20ms, there are four ROs (two SBFD ROs and two normal ROs) in a certain time period 0, and two ROs (two normal ROs) in a certain time period 1. When the RO index is RO1, in the certain time period 0, it represents the second RO (the second SBFD RO), while in the certain time period 1, it represents the second RO (the second normal RO);

[0300] especially, when the range of the RO indexes exceeds the number of ROs in a certain time period, for example, when the RO index directly corresponding to an RO cannot be found, the UE may skip the certain time period or find the corresponding RO in a circular manner; as illustrated in FIG. 8, when the RO index is RO2, it represents the third RO (for example, the first normal RO) in the certain time period 0; in the certain time period 1, there is no corresponding RO; UE may skip the certain time period 1 to find a following certain time period in which there is the RO corresponding to RO2; or the ROs in the certain time period 1 may be indexed in a cycle manner, for example, RO2 represents the first RO (also for example, the first normal RO) in the certain time period 1;

[0301] ◆dedicated preamble index; for example, the preamble index specially configured for UE to transmit;

[0302] ◆dedicated RNTI indication; for example, the RNTI received by the UE for using when searching for and receiving feedback (such as feedback PDCCH) from other nodes (such as network device);

[0303] ◆configuration of preamble transmission resources (including time-frequency resources and / or preamble resources and / or transmission power related), including a combination of one or more of:

[0304] ▶ a time unit interval, for example, the interval value between the time unit where the configured preamble transmission resource (for example, the RO where the preamble is located) and the time unit where the downlink resource receiving indication of UE dedicated random access resource; for example, the time unit where the preamble transmission resource is located can be determined by the interval and the time unit where the downlink resource receiving indication of UE dedicated random access resource;

[0305] ▶ the start symbol of the RO for preamble transmission on the time unit (e.g. slot) where the preamble transmission resource is located, which can be indicated by an index value of the symbol on the time unit, or obtained by the number of spaced symbols indicating the distance between the start symbol and the start location of the time unit;

[0306] ▶ format index of a random access preamble; indicating the format used by the configured preamble, wherein the options of the format are predefined, the number of time units and / or frequency domain units occupied by the preamble format can obtain through each option;

[0307] ▶ the number of time units and / or frequency domain units occupied by an RO;

[0308] ▶ root sequence index of the preamble;

[0309] ▶ the length of the preamble, such as 839 or 139, etc.;

[0310] ▶ subcarrier spacing of the preamble;

[0311] ▶ the period of the preamble transmission resource;

[0312] ▶ contents of the transmission power-related configuration may include one or more of the aforementioned SBFD dedicated power-related configurations, which are not repeated here;

[0313] ■The RO may be replaced by a valid RO and / or a valid SBFD RO; or a configured RO; wherein

[0314] ◆when the configured RO is invalid, or the valid SBFD RO the valid RO conflicts with other downlink reception or uplink reception, the preamble transmission is cancelled; or the preamble transmission is postpone to the next available valid RO;

[0315] ●After transmitting the preamble, the UE detects the feedback information from other nodes (such as network device), specifically including one or more of:

[0316] ■The UE uses the first RNTI to detect the feedback information; the first RNTI includes one of:

[0317] ◆the RA-RNTI, or SBFD RA-RNTI, calculated according to the RO used for transmitting the preamble; the calculation method of the RNTI may be:

[0318] ▶ calculating according to the configured f_id; f_id is the logical index of a random access occasion (RO) in frequency domain; from the perspective of the whole network, there may be multiple random access resources for different features over the whole bandwidth; a UE that only supports part of these features may only receive part of the random access configurations; for example, UE1 supports a feature of message 3 repetition and gets its corresponding random access configuration A; UE2 supports the feature of network slicing, and gets its corresponding random access configuration B; UE1 does not support the feature of network slicing, so UE1 cannot determine the random access configuration B; similarly, UE2 may not be able to determine the random access A; therefore, when calculating f_id, UE1 and UE2 both start the calculation from for example, f_id=0, starting from the first RO in the frequency domain of their respective random access configurations; this will lead to different ROs in time and conflict in the calculation of RA-RNTI; while the calculation according to the configured f_id provided in the present invention can enable the UE to avoid such conflict, in particular including:

[0319] -the configured f_id is the f_id of the first RO in the frequency domain of the current random access resource configuration; the f_ids of other ROs in the frequency domain of the current random access resource configuration are obtained by incrementing one in turn, such as the first RO is f_id, the second RO is f_id+1, and the third RO is f_id+2, and so on; or

[0320] -the configured f_id is the f_id of the last RO in the frequency domain of the current random access resource configuration; the f_ids of other ROs in the frequency domain of the current random access resource configuration are obtained by decrementing one in turn, such as the last RO is f_id, the second last RO is f_id-1, and the third last RO is f_id-2, and so on; or

[0321] -configuring f_ids for all ROs in frequency domain in current random access configuration resource; for example, if there are X frequency domain ROs in the current random access configuration resource, the configured f_ids are of a set or list, including X f_ids of X ROs; an f_id corresponds to a frequency domain RO;

[0322] -when the f_id is not configured, considering by default that f_id of the start RO is a fixed value, such as 0 or other preset values;

[0323] -preferably, the UE applies the configured f_id only when the random access configuration index of SBFD is the same as the first type random access configuration index, or when the UE finds that there are ROs corresponding to other features in the time unit where the selected RO is located. Otherwise, the UE applies the default f_id;

[0324] ▶ calculating according to a feature index or a feature group id (feature group index), the feature index or the feature group index is obtained according to logically indexing one or more features or feature groups for which the network device has configured random access configuration; for example, the network device has configured random access configuration for three features (such as message 3 repetition, network slicing, SBFD), then the random access configuration respectively corresponds to message 3 repetition with feature_id =0 and network slicing with feature_id= 1; SBFD with feature_id= 2 respectively; then RA-RNTI = 1 + s_id + 14 Х t_id + 14 Х 80 Х f_id + 14 Х 80 Х 8 Х ul_carrier_id+14 Х 80 Х k Х 2 Х feature_id, where k is the maximum value of f _ id, for example k=8;

[0325] ▶ calculating according to the new s_id of the RO, where s_id is the index of the second symbol or the last symbol of the RO (for example, in the current slot);

[0326] ◆C-RNTI, for example, after accessing the network, the UE uses the C-RNTI configured by the network device to search for the feedback of the network device;

[0327] ◆the aforementioned dedicated RNTI, for example, searching for the feedback of the network device with the dedicated RNTI configured on the dedicated random access resource configured by the network device received by the UE;

[0328] ■UE searches the feedback from the network device in the specified control resource set (COREST) and / or search space; the specified control resource set (COREST) and / or search space may be dedicated to SBFD UE (e.g., used by UE supporting SBFD); or dedicated to SBFD random access (for example, used by UE using SBFD RO for transmission);

[0329] ■UE searches the feedback from the network device in a specified search window, the specified search window is dedicated to SBFD UE (for example, used by UE supporting SBFD); or dedicated to SBFD random access (for example, used by UE using SBFD RO for transmission); specifically, it includes the start point of time units and / or the length of time units of the search window.

[0330] FIG. 9 shows a schematic structural diagram of a user equipment 900 according to at least one embodiment of the present disclosure. Referring to FIG. 9, the user equipment 900 includes a transceiver 901 and a controller 902. The transceiver 901 is configured to transmit data or signals and receive data or signals. The controller 902 is coupled with the transceiver 901 and configured to perform control so that the user equipment 900 performs the method according to the embodiment of the present disclosure. In one implementation, the user equipment 900 may further include a memory (not shown) on which computer-executable instructions are stored. When the instructions are performed by the controller 902, the user equipment 900 may perform at least one method corresponding to the above-mentioned embodiments of the present disclosure.

[0331] FIG. 10 shows a schematic structural diagram of a network device (e.g., a base station) 1000 according to at least one embodiment of the present disclosure. Referring to FIG. 10, the network device 1000 includes a transceiver 1001 and a controller 1002. The transceiver 1001 is configured to transmit data or signals and receive data or signals. The controller 1002 is coupled with the transceiver 1001 and configured to perform control so that the network device 1000 performs the method according to the embodiment of the present disclosure. In one implementation, the network device 1000 may further include a memory (not shown) on which computer-executable instructions are stored. When the instructions are performed by the controller 1002, the network device 1000 may perform at least one method corresponding to the above-mentioned embodiments of the present disclosure.

[0332] The above is only the preferred embodiment of the invention, and it is not used to limit the invention. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the invention should be included in the scope of protection of the invention.

[0333] Those skilled in that art will understand that the present invention includes apparatus for perform one or more of the operations described in this application. These devices can be specially designed and manufactured for required purposes, or they can also include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium including but not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM(Read-Only Memory, Read-only memory), RAM(Random Access Memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), flash memory, magnetic card or optical card. That is, a readable medium includes any medium in which information is stored or transmitted by a device (e.g., a computer) in a readable form.

[0334] It will be understood by those skilled in the art that each block in these structural diagrams and / or block diagrams and / or flow diagrams and combinations of blocks in these structural diagrams and / or block diagrams and / or flow diagrams can be implemented by computer program instructions. It can be understood by those skilled in the art that these computer program instructions can be provided to a general-purpose computer, a professional computer or a processor of other programmable data processing methods for implementation, so that the solution specified in the block or blocks of the structure diagram and / or block diagram and / or flow diagram disclosed in the present invention can be executed by the processor of the computer or other programmable data processing methods.

[0335] Those skilled in the art can understand that the steps, measures and solutions in various operations, methods and processes discussed in the present invention can be alternated, modified, combined or deleted. Further, other steps, measures and solutions in the various operations, methods and processes already discussed in the present invention can also be alternated, changed, rearranged, decomposed, combined or deleted. Further, steps, measures and solutions in various operations, methods and flows disclosed in the present invention in the prior art can also be alternated, changed, rearranged, decomposed, combined or deleted.

[0336] What has been described above is only part of the implementation of the present invention. It should be pointed out that for those skilled in the art, several improvements and embellishments can be made without departing from the principles of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.

Claims

1.A method performed by a user equipment (UE) in a communication system, the method comprising:receiving, from a base station, configuration information including random access configuration information associated with subband full duplex (SBFD),determining a valid physical random access channel (PRACH) occasion from PRACH occasions obtained based on the random access configuration information associated with SBFD;transmitting, to the base station, a random access preamble based on the valid PRACH occasion.2.The method of claim 1, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within SBFD symbols.3.The method of claim 1, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within the uplink (UL) subband.4.The method of claim 1, wherein the random access configuration information associated with SBFD includes SBFD dedicated power related configuration, andwherein the SBFD dedicated power related configuration includes at least one of:a path loss compensation coefficient,a preamble target received power,a power increasing delta value,a power ramping priority, ora power ramping step.5.A method performed by a base station in a communication system, the method comprising:transmitting, to a user equipment (UE), configuration information including random access configuration information associated with subband full duplex (SBFD),receiving, from the UE, a random access preamble based on a valid physical random access channel (PRACH) occasion,wherein the valid PRACH occasion is from PRACH occasions obtained based on the random access configuration information associated with SBFD.6.The method of claim 5, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within SBFD symbols.7.The method of claim 5, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within the uplink (UL) subband.8.The method of claim 5, wherein the random access configuration information associated with SBFD includes SBFD dedicated power related configuration, andwherein the SBFD dedicated power related configuration includes at least one of:a path loss compensation coefficient,a preamble target received power,a power increasing delta value,a power ramping priority, ora power ramping step.9.A user equipment (UE) in a communication system, the UE comprising:a transceiver; anda controller configured to:receive, from a base station, configuration information including random access configuration information associated with subband full duplex (SBFD),determine a valid physical random access channel (PRACH) occasion from PRACH occasions obtained based on the random access configuration information associated with SBFD;transmit, to the base station, a random access channel based on the valid PRACH occasion.10.The UE of claim 9, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within SBFD symbols.11.The UE of claim 9, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within the uplink (UL) subband.12.The UE of claim 9, wherein the random access configuration information associated with SBFD includes SBFD dedicated power related configuration, andwherein the SBFD dedicated power related configuration includes at least one of:a path loss compensation coefficient,a preamble target received power,a power increasing delta value,a power ramping priority, ora power ramping step.13.A base station in a communication system, the base station comprising:a transceiver; anda controller configured to:transmit, to a user equipment (UE), configuration information including random access configuration information associated with subband full duplex (SBFD),receive, from the UE, a random access channel based on a valid physical random access channel (PRACH) occasion,wherein the valid PRACH occasion is from PRACH occasions obtained based on the random access configuration information associated with SBFD.14.The base station of claim 13, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within SBFD symbols.15.The base station of claim 13, wherein a PRACH occasion is determined to be the valid PRACH occasion based on the PRACH occasion being within the uplink (UL) subband.

Images