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WO2025168417A1 - Procédés, dispositifs de communication et équipement d'infrastructure pour accès aléatoire en duplex intégral de sous-bande - Google Patents

Procédés, dispositifs de communication et équipement d'infrastructure pour accès aléatoire en duplex intégral de sous-bande

Info

Publication number
WO2025168417A1
WO2025168417A1 PCT/EP2025/052275 EP2025052275W WO2025168417A1 WO 2025168417 A1 WO2025168417 A1 WO 2025168417A1 EP 2025052275 W EP2025052275 W EP 2025052275W WO 2025168417 A1 WO2025168417 A1 WO 2025168417A1
Authority
WO
WIPO (PCT)
Prior art keywords
sbfd
prach
ros
communications device
communications
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/052275
Other languages
English (en)
Inventor
Shin Horng Wong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Europe Bv
Sony Group Corp
Original Assignee
Sony Europe Bv
Sony Group Corp
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Publication date
Application filed by Sony Europe Bv, Sony Group Corp filed Critical Sony Europe Bv
Publication of WO2025168417A1 publication Critical patent/WO2025168417A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present disclosure relates to communications devices, infrastructure equipment, and methods of operating communications devices and infrastructure equipment in a wireless communications network.
  • Previous generation mobile telecommunication systems such as those based on the 3GPP defined UMTS and Long Term Evolution (LTE) architecture, are able to support a wider range of services than simple voice and messaging services offered by previous generations of mobile telecommunication systems.
  • LTE Long Term Evolution
  • a user is able to enjoy high data rate applications such as mobile video streaming and mobile video conferencing that would previously only have been available via a fixed line data connection.
  • the demand to deploy such networks is therefore strong and the coverage area of these networks, i.e. geographic locations where access to the networks is possible, is expected to continue to increase rapidly.
  • Current and future wireless communications networks are expected to routinely and efficiently support communications with an ever- in creasing range of devices associated with a wider range of data traffic profiles and types than existing systems are optimised to support.
  • it is expected future wireless communications networks will be expected to efficiently support communications with devices including reduced complexity devices, machine type communication (MTC) devices, high resolution video displays, virtual reality headsets, extended Reality (XR) and so on.
  • MTC machine type communication
  • XR extended Reality
  • Some of these different types of devices may be deployed in very large numbers, for example low complexity devices for supporting the “The Internet of Things”, and may typically be associated with the transmissions of relatively small amounts of data with relatively high latency tolerance.
  • Other types of device for example supporting high- definition video streaming, may be associated with transmissions of relatively large amounts of data with relatively low latency tolerance.
  • Other types of device may be characterised by data that should be transmitted through the network with low latency and high reliability.
  • a single device type might also be associated with different traffic profiles / characteristics depending on the application(s) it is running. For example, different consideration may apply for efficiently supporting data exchange with a smartphone when it is running a video streaming application (high downlink data) as compared to when it is running an Internet browsing application (sporadic uplink and downlink data) or being used for voice communications by an emergency responder in an emergency scenario (data subject to stringent reliability and latency requirements).
  • the present disclosure can help address or mitigate at least some of the issues discussed above.
  • Figure 1 schematically represents some aspects of an LTE-type wireless telecommunication system which may be configured to operate in accordance with certain embodiments of the present disclosure
  • FIG. 2 schematically represents some aspects of a new radio access technology (RAT) wireless telecommunications system which may be configured to operate in accordance with certain embodiments of the present disclosure
  • RAT radio access technology
  • Figure 3 is a schematic block diagram of an example infrastructure equipment and communications device which may be configured to operate in accordance with certain embodiments of the present disclosure
  • Figure 4 schematically represents an example of non-overlapping subbands for uplink and downlink transmissions
  • Figure 5 schematically represents an example of non-overlapping subbands for uplink and downlink transmissions
  • Figure 6 schematically illustrates the components of an SSB
  • Figure 7 schematically illustrates an SSB burst set transmitted on SSB beams
  • Figure 10 schematically illustrates an example of a TDD slot format configuration
  • FIG. 12 schematically illustrates an SBFD slot format
  • Figure 13 schematically illustrates an SSB to RO mapping in an Association Period for an SBFD slot format
  • Figure 14 schematically illustrates ambiguity in SSB to RO mapping between an SBFD UE and a non-SBFD UE
  • Figure 15A schematically illustrates a method of operating a communications device in accordance with example embodiments
  • Figure 15B schematically illustrates a method of operating infrastructure equipment of a wireless communications network in accordance with example embodiments
  • Figure 16 schematically illustrates valid ROs in an UL subband of SBFD OFDM symbols in accordance with example embodiments
  • Figure 17 schematically illustrates a valid RO that overlaps a UL subband of SBFD OFDM symbols and UL OFDM symbols in accordance with example embodiments
  • Figure 18 schematically illustrates SBFD-RO association for ROs in OFDM symbols in accordance with example embodiments
  • Figure 19 schematically illustrates separate SSB-RO associations in accordance with example embodiments
  • Figure 21 schematically illustrates an SSB-RO mapping for non-SBFD, SBFD and TDD PRACH configurations in accordance with example embodiments.
  • Figure 1 provides a schematic diagram illustrating some basic functionality of a mobile telecommunications network / system 6 operating generally in accordance with LTE principles, but which may also support other radio access technologies, and which may be adapted to implement embodiments of the disclosure as described herein.
  • Various elements of Figure 1 and certain aspects of their respective modes of operation are well-known and defined in the relevant standards administered by the 3GPP (RTM) body, and also described in many books on the subject, for example, Holma H.
  • the network 6 includes a plurality of base stations 1 connected to a core network 2. Each base station provides a coverage area 3 (i.e. a cell) within which data can be communicated to and from communications devices 4. Although each base station 1 is shown in Figure 1 as a single entity, the skilled person will appreciate that some of the functions of the base station may be carried out by disparate, inter-connected elements, such as antennas (or antennae), remote radio heads, amplifiers, etc. Collectively, one or more base stations may form a radio access network.
  • Data is transmitted from base stations 1 to communications devices 4 within their respective coverage areas 3 via a radio downlink.
  • Data is transmitted from communications devices 4 to the base stations 1 via a radio uplink.
  • the core network 2 routes data to and from the communications devices 4 via the respective base stations 1 and provides functions such as authentication, mobility management, charging and so on.
  • Terminal devices may also be referred to as mobile stations, user equipment (UE), user terminal, mobile radio, communications device, and so forth.
  • Services provided by the core network 2 may include connectivity to the internet or to external telephony services.
  • the core network 2 may further track the location of the communications devices 4 so that it can efficiently contact (i.e. page) the communications devices 4 for transmitting downlink data towards the communications devices 4.
  • Base stations which are an example of network infrastructure equipment, may also be referred to as transceiver stations, nodeBs, e-nodeBs, eNB, g-nodeBs, gNB and so forth.
  • nodeBs nodeBs
  • e-nodeBs nodeBs
  • eNB nodeB
  • g-nodeBs gNodeBs
  • Massive Machine Type Communications is another example of a service which may be supported by NR-based communications networks.
  • systems may be expected to support further enhancements related to Industrial Internet of Things (lloT) in order to support services with new requirements of high availability, high reliability, low latency, and in some cases, high-accuracy positioning.
  • lloT Industrial Internet of Things
  • FIG. 2 An example configuration of a wireless communications network which uses some of the terminology proposed for and used in NR and 5G is shown in Figure 2.
  • a plurality of transmission and reception points (TRPs) 10 are connected to distributed control units (DUs) 41 , 42 by a connection interface represented as a line 16.
  • Each of the TRPs 10 is arranged to transmit and receive signals via a wireless access interface within a radio frequency bandwidth available to the wireless communications network.
  • DUs distributed control units
  • DUs distributed control units
  • Figure 2 represents merely one example of a proposed architecture for a new RAT based telecommunications system in which approaches in accordance with the principles described herein may be adopted, and the functionality disclosed herein may also be applied in respect of wireless telecommunications systems having different architectures.
  • certain embodiments of the disclosure as discussed herein may be implemented in wireless telecommunication systems / networks according to various different architectures, such as the example architectures shown in Figures 1 and 2. It will thus be appreciated the specific wireless telecommunications architecture in any given embodiment is not of primary significance to the principles described herein.
  • certain embodiments of the disclosure may be described generally in the context of communications between network infrastructure equipment I access nodes and a communications device, wherein the specific nature of the network infrastructure equipment / access node and the communications device will depend on the network infrastructure for the embodiment at hand.
  • the network infrastructure equipment I access node may comprise a base station, such as an LTE-type base station 1 as shown in Figure 1 which is adapted to provide functionality in accordance with the principles described herein, and in other examples the network infrastructure equipment may comprise a control unit / controlling node 40 and / or a TRP 10 of the kind shown in Figure 2 which is adapted to provide functionality in accordance with the principles described herein.
  • a base station such as an LTE-type base station 1 as shown in Figure 1 which is adapted to provide functionality in accordance with the principles described herein
  • the network infrastructure equipment may comprise a control unit / controlling node 40 and / or a TRP 10 of the kind shown in Figure 2 which is adapted to provide functionality in accordance with the principles described herein.
  • a TRP 10 as shown in Figure 2 comprises, as a simplified representation, a wireless transmitter 30, a wireless receiver 32 and a controller or controlling processor 34 which may operate to control the transmitter 30 and the wireless receiver 32 to transmit and receive radio signals to one or more UEs 14 within a cell 12 formed by the TRP 10.
  • an example UE 14 is shown to include a corresponding transmitter 49, a receiver 48 and a controller 44 which is configured to control the transmitter 49 and the receiver 48 to transmit signals representing uplink data to the wireless communications network via the wireless access interface formed by the TRP 10 and to receive downlink data as signals transmitted by the transmitter 30 and received by the receiver 48 in accordance with the conventional operation.
  • the transmitters 30, 49 and the receivers 32, 48 may include radio frequency filters and amplifiers as well as signal processing components and devices in order to transmit and receive radio signals in accordance for example with the 5G/NR standard.
  • the controllers 34, 44 (as well as other controllers described in relation to examples and embodiments of the present disclosure) may be, for example, a microprocessor, a CPU, or a dedicated chipset, etc., configured to carry out instructions which are stored on a computer readable medium, such as a non-volatile memory.
  • the processing steps described herein may be carried out by, for example, a microprocessor in conjunction with a random access memory, operating according to instructions stored on a computer readable medium.
  • the transmitters, the receivers and the controllers are schematically shown in Figure 3 as separate elements for ease of representation. However, it will be appreciated that the functionality of these elements can be provided in various different ways, for example using one or more suitably programmed programmable computer(s), or one or more suitably configured application-specific integrated circuit(s) / circuitry / chip(s) / chipset(s).
  • the infrastructure equipment / TRP / base station as well as the UE / communications device will in general comprise various other elements associated with its operating functionality.
  • the TRP 10 also includes a network interface 50 which connects to the DU 42 via a physical interface 16.
  • the network interface 50 therefore provides a communication link for data and signalling traffic from the TRP 10 via the DU 42 and the CU 40 to the core network 20.
  • the interface 46 between the DU 42 and the CU 40 is known as the F1 interface which can be a physical or a logical interface.
  • the F1 interface 46 between CU and DU may operate in accordance with specifications 3GPP TS 38.470 and 3GPP TS 38.473, and may be formed from a fibre optic or other wired or wireless high bandwidth connection.
  • the connection 16 from the TRP 10 to the DU 42 is via fibre optic.
  • the connection between a TRP 10 and the core network 20 can be generally referred to as a backhaul, which comprises the interface 16 from the network interface 50 of the TRP 10 to the DU 42 and the F1 interface 46 from the DU 42 to the CU 40.
  • sub-bands 401 to 403 shown in Figure 4 is just one possible arrangement of the sub-bands and other arrangements are possible, and guard bands may be used in substantially any sub-band arrangement.
  • An SSB burst set comprises a set of one or more time-multiplexed SSBs. Each SSB is transmitted in a burst set using a different downlink beam, thereby enabling beam sweeping to be implemented for SSB.
  • An SSB burst set may be confined within 5 ms and may comprise up to 4, 8 and 64 SSBs for frequency bands below 3 GHz, between 3 GHz - 6 GHz and for FR2 respectively. As will be understood by one skilled in the art, SSB burst sets may be periodically transmitted.
  • the UE measures a signal quality of each SSB in the SSB burst set.
  • the UE may then select one of the downlink beams based on the measured signal quality. For example, the UE may select the downlink beam with the highest measured signal quality provided that the measure signal quality is above a threshold (such as RSRP threshold).
  • the UE determines an uplink beam corresponding to the downlink beam to use for synchronisation with the infrastructure equipment.
  • corresponding uplink and downlink beams form beam pairs which overlap. Therefore, the measurements of the signal quality of a downlink beam are an indication of the signal quality of the corresponding uplink beam in the beam pair.
  • the UE transmits RACH on the determined uplink beam.
  • the measured signal quality of an SSB is an RSRP of the SSB.
  • the UE may measure the RSRP of each SSB in the SSB burst set and select the downlink beam on which the SSB with the highest RSRP was transmitted provided this measured RSRP is above a threshold (such as rsrp-ThresholdSSB). Then, the UE transmits its RACH using the corresponding uplink beam.
  • a threshold such as rsrp-ThresholdSSB
  • the measurement of the RSRP of an SSB may be referred to as “SS-RSRP”.
  • the measurement of the RSRP of an SSB may comprise measuring the RSRP on resource elements where SSS is transmitted.
  • the measurement of the RSRP of an SSB may comprise measuring the RSRP on resource elements where PBCH DM RS is transmitted.
  • ROs are configured in communications resources of a wireless access interface.
  • Communications resources are comprised of time resources and frequency resources.
  • the time resources of the ROs in a PRACH Occasion configuration are determined by a “PRACH Configuration Index”, which is an index to Tables 6.3.3.2-2, 6.3.3.2-3 & 6.3.3.2- 4 in [6], which is hereby incorporated by reference in its entirety.
  • PRACH Configuration Index is an index to Tables 6.3.3.2-2, 6.3.3.2-3 & 6.3.3.2- 4 in [6], which is hereby incorporated by reference in its entirety.
  • PRACH Configuration Index There are 256, 263 and 256 PRACH configurations for FR1 FDD, FR1 TDD and FR2 respectively.
  • the PRACH configuration index indicates a PRACH preamble format, a PRACH periodicity (known as a “PRACH Configuration Period”), a number of PRACH Occasions within a PRACH period, the starting symbol of the PRACH Occasion in a slot and a duration of the PRACH Occasion.
  • PRACH Configuration Period a PRACH periodicity
  • FIG. 8 An example PRACH Occasion configuration for an FR1 FDD system is shown Figure 8.
  • the time resources of the ROs in the PRACH Occasion can be obtained from Table 6.3.3.2- 2 of [6]:
  • subframe 4 and 9 contain a slot with ROs, i.e., PRACH slot.
  • PRACH slot In this example a 15 kHz subcarrier spacing is assumed and so each subframe which is 1 ms contains 1 slot.
  • each PRACH slot i.e.
  • a UE may select an SSB received on a DL beam and transmit a PRACH using a corresponding UL beam.
  • the gNB needs to know which SSB the UE has selected so that it can transmit a Random Access Response (RAR) to the UE using the same SSB beam selected by the UE, or a beam derived from the UE selected SSB beam. Since the UE uses an UL beam, the gNB may maximise its reception by tuning its receiver panels towards the direction of the UL beam.
  • RAR Random Access Response
  • the SSBs are then mapped to the indexed ROs sequentially by RO index. This mapping is repeated every “SSB-RO Association Period”.
  • the SSB-RO Association Period is the smallest integer number of PRACH Configuration Periods required for all the SSBs in an SSB burst set to fully map to RO(s) at least once. In an SSB-RO Association Period, if any remaining ROs cannot fully map all the SSBs of an SSB burst set, they are invalid ROs and are not used for PRACH transmissions.
  • the allowed SSB-RO Association Periods for each PRACH Configuration Period are listed in Table 8.1-1 of [7], which is reproduced below as Table 1.
  • Figure 10 illustrates a legacy TDD slot format ⁇ DDDDU ⁇ , consisting of 4 DL slots followed by an UL slot as shown in Figure 10 operating in 15 kHz subcarrier spacing.
  • SSB and PRACH are configured as follows:
  • SSB burst set has 5 SSBs ⁇ SSB#1 , SSB#2, SSB#3, SSB#4, SSB#5 ⁇
  • Preambles per SSB 64, i.e., all preambles in an RO are fully mapped to an SSB
  • PRACH Configuration Index 129 for FR1 TDD
  • PRACH Configuration Period 10 ms, as shown in Figure 11.
  • Subframe 3, 4, 8 and 9 contain PRACH slot, and in each PRACH slot, there are 2 time domain ROs with duration 6 OFDM symbols each, which leads to 16 ROs in a PRACH Configuration Period (4 PRACH slot x 2 time domain ROs per PRACH slot x 2 FDM ROs). Since valid RO can only reside in UL OFDM symbols, only subframe 4 and 9 have valid ROs and the ROs in subframe 3 and 8 are invalid ROs. Hence, each PRACH Configuration Period has 8 valid ROs.
  • the 16 valid ROs in the 20 ms SSB-RO Association Period are indexed firstly by preamble, secondly by frequency, thirdly by time and lastly by PRACH slot as shown in Figure 11 .
  • the 5 SSBs are fully mapped to the ROs once in the SSB-RO Association Period with 6 remaining ROs: RO#11 , RO#12, RO#13, RO#14, RO#15 and RO#16, that cannot fully map another set of 5 SSBs. Hence these 6 remaining ROs are Invalid ROs and are not used for PRACH transmissions.
  • step S1 The method starts in step S1.
  • the method comprises determining one or more mappings between a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured in communications resources of a wireless access interface provided by infrastructure equipment of a wireless communications network and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams.
  • PRACH Physical Random Access Channel
  • ROs Occasions
  • SSBs synchronisation signal blocks
  • the communications device may receive an indication of a PRACH configuration from the infrastructure equipment.
  • the PRACH configuration comprises the plurality of ROs configured in the communications resources of the wireless access interface.
  • an uplink, or UL, OFDM symbol is an OFDM symbol comprised of communications resources which are reserved for uplink transmissions.
  • an SBFD OFDM symbol is an OFDM symbol comprised of uplink communications resources reserved for uplink transmissions and downlink communications resources reserved for downlink transmissions.
  • the uplink subband of an SBFD OFDM symbols refers to a range of frequencies in the SBFD OFDM symbol which consist of uplink communications resources.
  • an SBFD symbol may comprise frequency resources between f1 and f4.
  • Downlink communications resources may be between f1 and f2, and between f3 and f4, in the SBFD OFDM symbol and uplink communications resources may be between f2 and f3 in the SBFD OFDM symbol.
  • the range f2 to f3 refers to the uplink subband of the SBFD OFDM symbol.
  • the determining one or more mappings between the plurality of ROs and the plurality of SSBs comprises determining a first and second mapping, wherein the determined at least one mapping is the first mapping.
  • the determining the second mapping comprises determining valid ROs for the second mapping by applying one or more validity conditions for the second mapping to the plurality of ROs configured in the communications resources of the wireless access interface, and associating each of the SSBs with the preconfigured number of the valid ROs for the second mapping.
  • the validity conditions for the first mapping comprise the first validity condition and the validity conditions for the second mapping comprise the second condition, or the validity conditions for the first mapping comprise the second condition and the validity conditions for the second mapping comprise the first validity condition.
  • the validity conditions for the first mapping comprise the first validity condition, the first mapping is determined before the second mapping, and the second mapping comprises a third validity condition that valid ROs must not have already been mapped according to the first mapping.
  • the validity conditions for the second mapping comprise the first validity condition, the second mapping is determined before the first mapping, and the first mapping comprises a third validity condition that that valid ROs must not have already been mapped according to the second mapping.
  • the validity conditions for the first mapping comprise the third validity condition and the validity conditions for the first mapping comprise the second validity condition, or the validity conditions for the second mapping comprise the third validity condition and the validity conditions for the second mapping comprise the second validity condition.
  • the validity conditions for the first mapping comprise the third validity condition and the validity conditions for the first mapping comprise a fifth validity condition
  • the validity conditions for the second mapping comprise the third validity condition and the validity conditions for the second mapping comprise the fifth validity condition.
  • the fifth validity condition is a condition that valid ROs must be completely contained within uplink OFDM symbols in the communications resources of the wireless access interface, or completely contained within an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface, or a part of a valid RO is contained in uplink OFDM symbols in the communications resources of the wireless access interface and the other part of the valid RO is contained in an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface.
  • the one or more validity conditions may additionally comprise a gap condition that an RO is invalid if there is less than a predefined number (N gap ) of OFDM symbols between any one of the SSBs and the start of the RO.
  • the one or more validity conditions may additionally comprise a slot condition that an RO is invalid if the RO is in the same slot as any one of the SSBs and the RO precedes the SSB in the slot. In other words, if an SSB and RO are in the same slot, the RO is can only be valid if it occurs after the SSB in the slot.
  • the communications device applies the first validity condition, the gap condition and the slot condition. In some embodiments, the communications device applies the second validity condition, the gap condition and the slot condition. In some embodiments, the infrastructure equipment may transmit an indication to the communications device to determine a plurality of mappings between the plurality of ROs and the plurality of SSBs.
  • the indication to determine the plurality of mappings may comprise, for each mapping, an indication of one or more validity conditions to apply to the plurality of ROs to determine the mapping.
  • the one or more validity conditions for at least one of the mappings may comprise the first or fourth validity condition.
  • the one or more validity conditions for a different one of the mapping may comprise the other of the first and fourth validity condition, or the one or more validity conditions for the different one of the mapping may comprise the third validity condition, for example.
  • the associating each of the SSBs with a preconfigured number of the valid ROs comprises firstly, indexing the valid ROs, and, secondly, associating the SSBs to the indexed ROs sequentially by RO index.
  • the association may be repeated every “SSB-RO Association Period” which is the smallest integer number of PRACH Configuration Periods required for all the SSBs in an SSB burst set to fully map to RO(s) at least once.
  • SSB-RO Association Period is the smallest integer number of PRACH Configuration Periods required for all the SSBs in an SSB burst set to fully map to RO(s) at least once.
  • the indexing of the valid ROs may comprise indexing the valid ROs in the following order:
  • Non-overlapping ROs do not share communications resources in the wireless access interface.
  • non-overlapping ROs do not share time and frequency resources but may share time resources if they do not share frequency resources or share frequency resources if they do not share time resources.
  • step S14 The method ends in step S14.
  • steps S12 and S13 may be interchanged.
  • First legacy validity condition A valid RO is contained fully in UL OFDM symbols since PRACH cannot be transmitted in DL OFDM symbols.
  • Third legacy validity condition If an RO and an SSB falls within a PRACH slot, the RO is invalid if it precedes the SSB.
  • SBFD UEs may be configured to apply a first valid RO determination method comprising applying one or more validity conditions to ROs.
  • a validity condition is that valid ROs must be completely contained within uplink OFDM symbols (referred to as the “first validity condition” throughout this disclosure).
  • the first validity condition is therefore the same as the first legacy validity condition currently used by legacy (i.e. non-SBFD) UEs. Therefore, ROs that partially or fully overlap SBFD OFDM symbols are invalid ROs.
  • the first valid RO determination method may also comprise applying the second and third legacy validity conditions mentioned above. Implementing the first valid determination method means that SBFD UEs will determine that the same ROs are valid as compared to legacy UEs, thereby resolving the ambiguity at the gNB.
  • SBFD UEs may be configured to apply a second valid RO determination method comprising applying one or more validity conditions to ROs.
  • a validity condition is that valid ROs must be completely contained either within uplink OFDM symbols or within an uplink subband of SBFD OFDM symbols (referred to as the “fourth validity condition” throughout this disclosure).
  • the second valid RO determination method may also comprise applying the second and third legacy validity conditions mentioned above.
  • RO#n, RO#n+2, RO#n+4 and RO#n+6 are fully contained in the UL subband of SBFD OFDM symbols, and are therefore valid ROs.
  • the first OFDM symbol of RO#n+8 is fully in the UL subband but the second OFDM symbol of RO#n+8 is in a DL OFDM symbol. Therefore, RO#n+8 is an invalid RO.
  • the remaining OFDM symbols are outside of the UL subband and so they are invalid ROs.
  • SBFD UEs may be configured to apply a third valid RO determination method comprising applying one or more validity conditions to ROs.
  • a validity condition is that valid ROs must be completely contained within uplink OFDM symbols, or completely contained within an uplink subband of SBFD OFDM symbols, or a part of a valid RO is contained in uplink OFDM symbols and the other part of the valid RO is contained in an uplink subband of SBFD OFDM symbols (referred to throughout this disclosure as the “fifth validity condition”).
  • the third valid RO determination method may also comprise applying the second and third legacy validity conditions mentioned above.
  • SBFD UEs may be configured to apply a fifth valid RO determination method comprising applying one or more validity conditions to ROs.
  • a validity condition is that previously mapped ROs are invalid (referred to as the “third validity condition” throughout this disclosure). In other words, any RO that has already been mapped to an SSB in previous SSB-RO association are considered invalid ROs. Then, either the legacy, first, second, third or fourth valid RO determination method is applied to the remaining ROs to determine valid ROs among the remaining ROs.
  • an SBFD UE may be configured to determine a plurality of SSB to RO mappings for a given PRACH configuration.
  • one of the plurality of mappings is for non-SBFD symbols and a different one of the plurality of mappings is for SBFD OFDM symbols.
  • the mapping for the non-SBFD OFDM symbols may use the first valid RO determination method. Accordingly, in the mapping for the non-SBFD OFDM symbols, ROs which overlap SBFD OFDM symbols are invalid.
  • SSB#1 is mapped to RO#1 and RO#2
  • SSB#2 is mapped to RO#3 and RO#4
  • SSB#3 is mapped to RO#5 and RO#6
  • SSB#4 is mapped to RO#7 and RO#8,
  • SSB#5 is mapped to RO#9 and RO#10.
  • ROs#11 to RO#16 are invalid.
  • the mapping for the non-SBFD OFDM symbols uses the first valid RO determination method and the mapping for the SBFD OFDM symbols uses the fifth valid RO determination method.
  • the first valid determination method is applied first such that only ROs completely contained within uplink OFDM symbols are valid ROs in the mapping for the non-SBFD OFDM symbols.
  • the fifth valid determination method is applied such that the ROs in the PRACH configuration which have already been mapped according to the mapping for the non-SBFD OFDM symbols are considered invalid ROs in the mapping for the SBFD OFDM symbols.
  • an SBFD UE may be configured with a PRACH configuration (referred to as an “SBFD PRACH configuration”) that is different from the legacy PRACH configuration.
  • the SBFD UE therefore uses the ROs provided by the SBFD PRACH configuration for PRACH transmission.
  • the ROs in the SBFD PRACH configuration may overlap with ROs in legacy PRACH configuration.
  • the gNB may differentiate the ROs in the SBFD PRACH configuration from the ROs in the legacy PRACH configuration by using different preambles for the ROs in the SBFD PRACH configuration compared with the ROs in the legacy PRACH configuration.
  • the SBFD UE may apply an SSB to RO mapping to the ROs in the SBFD PRACH configuration which uses the second or third valid RO determination method. Since the ROs in the SBFD PRACH configuration and legacy PRACH configuration do not overlap, there is no ambiguity in the UE selected SSB at the gNB. As an example, consider an FR1 TDD system with 5 SSBs ⁇ SSB#1, SSB#2, SSB#3, SSB#4, SSB#5 ⁇ and with two PRACH configurations, one for legacy TDD (a “legacy PRACH Configuration”) and another for SBFD (“an SBFD PRACH configuration”), as shown in Table 2.
  • the SBFD mapping is: SSB#1 is mapped to RO#1 and RO#2 in subframe 3 of SFN k, SSB#2 is mapped to RO#3 and RO#4 in subframe 4 of SFN k, SSB#3 is mapped to RO#5 and RO#6 in subframe 8 of SFN k, SSB#4 is mapped to RO#7 and RO#8 in subframe 9 of SFN k, and SSB#5 is mapped to RO#9 and RO#10 in subframe 3 of SFN k+1.
  • an SBFD UE may be configured with at least two PRACH configurations.
  • the SBFD UE may be configured with a “non-SBFD PRACH configuration” for non-SBFD OFDM symbols and an “SBFD PRACH configuration” for SBFD OFDM symbols.
  • the at least two PRACH configuration may can completely overlap without preamble partitioning.
  • the communications device applies a mapping comprising the first validity condition to one of the PRACH configurations and another mapping comprising the fourth validity condition to the another of the PRACH configurations, ambiguity is avoided at the gNB as explained previously.
  • the at least two PRACH configurations may be different.
  • the SBFD UE uses a mapping for the non- SBFD PRACH configuration which uses the first valid RO determination method, where ROs in SBFD OFDM symbols are invalid ROs and ROs in UL OFDM symbols are valid ROs.
  • the SBFD UE uses a mapping for the SBFD PRACH configuration which uses the fourth valid determination method, where ROs in UL OFDM symbols are invalid ROs and ROs in UL subband of SBFD OFDM symbols are valid ROs.
  • the number of valid ROs prior to SSB-RO association, for each PRACH configuration is:
  • the fourth valid RO determination method is used.
  • the SSB-RO Association Periods for all 3 of the PRACH Configurations are 20 ms (2* PRACH Configuration Period). In some embodiments, the SSB-RO Association period for each of the 3 PRACH configuration period is not the same.
  • the SBFD mapping is: SSB#1 is mapped to RO#1 in subframe 2 of SFN k, SSB#2 is mapped to RO#2 in subframe 2 of SFN k, SSB#3 is mapped to RO#3 in subframe 7 of SFN k, SSB#4 is mapped to RO#4 in subframe 7 of SFN k, and SSB#5 is mapped to RO#5 in subframe 2 of SFN k+1.
  • the legacy TDD mapping is: SSB#1 is mapped to RO#1 and RO#2 in subframe 4 of SFN k, SSB#2 is mapped to RO#3 and RO#4 in subframe 4 of SFN k, SSB#3 is mapped to RO#5 and RO#6 in subframe 9 of SFN k, SSB#4 is mapped to RO#7 and RO#8 in subframe 9 of SFN k, and SSB#5 is mapped to RO#9 and RO#10 in subframe 4 of SFN k+1.
  • the gNB may determine that the UE is an SBFD UE if the gNB receives a PRACH in an RO in the SBFD PRACH configuration or in the non-SBFD PRACH configuration.
  • the gNB may determine that the UE is a legacy UE if the gNB receives a PRACH in an RO in a legacy PRACH configuration.
  • the gNB configures the PRACH configurations such that the ROs in the legacy PRACH configuration do not overlap with the ROs in the SBFD or non-SBFD PRACH configurations.
  • the gNB may transmit Msg3 to the SBFD UE in a UL subband of SBFD OFDM symbols, thereby improving communications efficiency.
  • the preambles in the one or more ROs are partitioned to distinguish between SBFD UE and legacy UE.
  • SBFD UE is configured to use preambles 0 to 31
  • legacy UE is configured to use preambles 32 to 63. Therefore, the gNB may determine, based on the preamble used, whether the UE transmitting a PRACH in the RO is a UE or SBFD UE.
  • preamble partitioning is used only for ROs in UL OFDM symbols. Such embodiments are particularly advantageous in cases where a separate PRACH Configurations is used for SBFD and legacy UE (see section on Single Separate PRACH Configurations above). Since only SBFD UEs can use the ROs in SBFD OFDM symbols, there is no need to have preamble partitioning for these ROs as any PRACH transmitted using these ROs would indicate that the UE is capable of SBFD. On the other hand, a PRACH transmitted in ROs in UL OFDM symbols may be from a legacy UE or SBFD UE and hence, preamble partitioning may be used to distinguish them. In such embodiments, preamble partitioning is only applied to ROs in UL OFDM symbols, and is thus more efficient than if preamble partitioning was applied to al ROs.
  • the PDCCH Order in addition to the Mask Index, also comprises an indication of whether the UE should transmit using SBFD ROs/preambles or legacy ROs/preambles.
  • the PDCCH Order in addition to the Mask Index, also comprises an indication of a PRACH configuration which the Mask Index applies to.
  • the indication of the PRACH configuration which the Mask index applies to comprises an indication of a set of ROs in the PRACH configuration which the Mask Index applies to.
  • a PRACH configuration transmitted from the gNB to a UE comprises an indication of a plurality of mappings between ROs and SSBs to be applied by the communications device (for example, an SBFD mapping and a non-SBFD mapping).
  • the ROs in the PRACH configurations are mapped according to each of the plurality of mappings such that the ROs are indexed differently according to one of the mappings compared to another one of the mappings.
  • the PDCCH order may, in addition to the mask index, may comprise an indication of which of the mappings the mask index applies to.
  • a method of operating a subband full duplex, SBFD, communications device comprising determining one or more mappings between a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured in communications resources of a wireless access interface provided by infrastructure equipment of a wireless communications network and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, wherein determining at least one of the mappings comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs configured in the communications resources of the wireless access interface, the one or more validity conditions comprising a first validity condition that valid ROs must be completely contained within uplink Orthogonal Frequency Division Multiplexing, OFDM, symbols in the communications resources of the wireless access interface, or a second validity condition that valid ROs must be completely contained within an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface, wherein the determining at least one of the mappings further comprises associating
  • PRACH Physical Random Access
  • Paragraph 2 A method according to paragraph 1, wherein the determining one or more mappings between the plurality of ROs and the plurality of SSBs comprises determining a first and second mapping, wherein the determined at least one mapping is the first mapping, and the determining the second mapping comprises determining valid ROs for the second mapping by applying one or more validity conditions for the second mapping to the plurality of ROs configured in the communications resources of the wireless access interface, associating each of the SSBs with the preconfigured number of the valid ROs for the second mapping.
  • Paragraph 4 A method according to paragraph 2, wherein the validity conditions for the first mapping comprise the first validity condition, the first mapping is determined before the second mapping, and the second mapping comprises a third validity condition that valid ROs must not have already been mapped according to the first mapping, or the validity conditions for the second mapping comprise the first validity condition, the second mapping is determined before the first mapping, and the first mapping comprises a third validity condition that that valid ROs must not have already been mapped according to the second mapping.
  • Paragraph 5 A method according to paragraph 4, wherein the validity conditions for the first mapping comprise the third validity condition and the validity conditions for the first mapping comprise the second validity condition, or the validity conditions for the second mapping comprise the third validity condition and the validity conditions for the second mapping comprise the second validity condition.
  • Paragraph 6 A method according to paragraph 4, wherein the validity conditions for the first mapping comprise the third validity condition and the validity conditions for the first mapping comprise a fourth validity condition, or the validity conditions for the second mapping comprise the third validity condition and the validity conditions for the second mapping comprise the fourth validity condition, wherein the fourth validity condition is a condition that valid ROs must be completely contained either within uplink OFDM symbols in the communications resources of the wireless access interface or completely contained within an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface.
  • Paragraph 7 A method according to paragraph 4, wherein the validity conditions for the first mapping comprise the third validity condition and the validity conditions for the first mapping comprise a fifth validity condition, or the validity conditions for the second mapping comprise the third validity condition and the validity conditions for the second mapping comprise the fifth validity condition, wherein the fifth validity condition is a condition that valid ROs must be completely contained within uplink OFDM symbols in the communications resources of the wireless access interface, or completely contained within an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface, or a part of a valid RO is contained in uplink OFDM symbols in the communications resources of the wireless access interface and the other part of the valid RO is contained in an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface.
  • the fifth validity condition is a condition that valid ROs must be completely contained within uplink OFDM symbols in the communications resources of the wireless access interface, or completely contained within an uplink subband of SBFD OFDM symbols in the communications resources of the wireless access interface, or a part of a valid RO is contained in up
  • Paragraph 8 A method according to any of paragraphs 1 to 7, wherein the one or more validity conditions comprise a condition that an RO is invalid if there is less than a predefined number (N gap ) of OFDM symbols between any one of the SSBs and the start of the RO.
  • Paragraph 9 A method according any of paragraphs 1 to 8, wherein the one or more invalidity conditions comprise a condition that an RO is invalid if the RO is in the same slot as any one of the SSBs and the RO precedes the SSB in the slot.
  • Paragraph 10 A method according to any of paragraphs 1 to 9, wherein the configuration of the ROs in the communications resources of the wireless access interface is a first PRACH configuration and the SBFD communications device is configured with a second PRACH configuration comprising a plurality of ROs in the communications resources of the wireless access interface, wherein the first PRACH configuration and the second PRACH configuration are different, and the method comprises determining one or more mappings between the plurality of ROs in the second PRACH configuration and the plurality of SSBs, wherein determining at least one of the mappings between the plurality of ROs in the second PRACH configuration and the plurality of SSBs comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs in the second PRACH configuration, and associating each of the SSBs with a preconfigured number of the valid ROs in the second PRACH configuration.
  • Paragraph 11 A method according to paragraph 10, wherein the validity conditions for the determined at least one mapping for the first PRACH configuration comprise the first validity condition and the validity conditions for the determined at least one mapping for the second PRACH configuration comprise the second validity condition, or the validity conditions for the determined at least one mapping for the first PRACH configuration comprises the second validity condition and then the validity conditions for the determined at least one mapping for the second PRACH configuration comprise the first validity condition.
  • Paragraph 14 A method according to any of paragraphs 10 to 13, wherein the ROs in the first PRACH configuration are separated in frequency with respect to the ROs in the second PRACH configuration.
  • Paragraph 15 A method according to any of paragraphs 1 to 14, wherein the method comprises receiving one or more of the SSBs from the infrastructure equipment, selecting one of the SSBs received from the infrastructure equipment, selecting one of the plurality of ROs for transmitting a PRACH to the infrastructure equipment, the selected RO being an RO associated with the selected the SSB according to the determined at least one mapping, and transmitting a PRACH to the infrastructure equipment in the selected RO.
  • a method of operating infrastructure equipment of a wireless communications network comprising transmitting an indication of a Physical Random Access Channel (PRACH) configuration to a sub-band full duplex, SBFD, communications device, the PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by infrastructure equipment, transmitting, to the SBFD communications device, an indication to determine a plurality of mappings between the plurality of ROs and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, wherein the indication to determine the plurality of mappings comprises, for each mapping, an indication of one or more validity conditions to apply to the plurality of ROs to determine the mapping, wherein the one or more validity conditions for at least one of the mappings comprises a first validity condition that valid ROs must be completely contained within uplink Orthogonal Frequency Division Multiplexing, OFDM, symbols in the communications resources
  • PRACH Physical
  • a method of operating a subband full duplex, SBFD, communications device comprising receiving, from infrastructure equipment of a wireless communications network, an indication of a first Physical Random Access Channel (PRACH) configuration, the first PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by the infrastructure equipment, wherein the first PRACH configuration is different from a second PRACH configuration configured for a non-SBFD communications device, and the method comprises determining one or more mappings between the plurality of ROs in the first PRACH configuration and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, wherein determining at least one of the mappings comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs in the first PRACH configuration, and associating each of the SSBs with a preconfigured number of the valid ROs.
  • PRACH Physical Random Access Channel
  • a method of operating infrastructure equipment of a wireless communications network comprising transmitting an indication of a first Physical Random Access Channel (PRACH) configuration to a sub-band full duplex, SBFD, communications device, the first PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by infrastructure equipment, transmitting an indication of a second PRACH configuration to a non-SBFD communications device, the second PRACH configuration comprising a plurality of ROs configured for the non-SBFD communications device in the communications resources of the wireless access interface, wherein the first PRACH configuration and the second PRACH configuration are different.
  • PRACH Physical Random Access Channel
  • SBFD sub-band full duplex
  • Paragraph 23 A method according to paragraph 22, comprising receiving a PRACH from the SBFD communications device in one of the ROs in the third PRACH configuration, and transmitting a response signal to the SBFD communications device in response to the PRACH, the response signal being completely contained in an uplink subband of SBFD OFDM symbols of the wireless access interface, or a part of the response signal is contained in an uplink subband of SBFD OFDM symbols of the wireless access interface and the other part of the response signal is contained in uplink OFDM symbols of the wireless access interface.
  • Paragraph 24 A method according to paragraph 23, wherein the response signal is Msg3.
  • Paragraph 25 A method according to any of paragraphs 19 to 23 comprising transmitting a plurality of synchronisation signal blocks (SSBs) on a plurality of downlink beams.
  • Paragraph 26 A method of operating a subband full duplex, SBFD, communications device, the method comprising determining one or more mappings between a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured in communications resources of a wireless access interface provided by infrastructure equipment of a wireless communications network and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, each RO supporting a plurality of preambles, one or more of the preambles being configured for use by SBFD communications devices and one or more others of the preambles being configured for use by non-SBFD communications devices, wherein determining at least one of the mappings comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs configured in the communications resources of the wireless access interface, and as
  • Paragraph 27 A method according to paragraph 26, wherein the method comprises receiving one or more of the SSBs from the infrastructure equipment, selecting one of the SSBs received from the infrastructure equipment, selecting one of the plurality of ROs for transmitting a PRACH to the infrastructure equipment, the selected RO being an RO associated with the selected the SSB according to the determined at least one mapping, and transmitting a PRACH to the infrastructure equipment in the selected RO using one of the preambles configured for use by SBFD communications devices.
  • Paragraph 29 A method according to paragraph 28, wherein the method comprises transmitting a plurality of synchronisation signal blocks (SSBs) on a respective plurality of downlink beams, receiving a PRACH from the communications device in one of the ROs, and transmitting a response signal to the communications device, wherein if a preamble of the PRACH received from the communications device is one of the preambles configured for use by SBFD communications devices, the response signal is completely contained in an uplink subband of SBFD OFDM symbols of the wireless access interface, or a part of the response signal is contained in an uplink subband of SBFD OFDM symbols of the wireless access interface and the other part of the response signal is contained in uplink OFDM symbols of the wireless access interface, or if the preamble of the PRACH received from the communications device is one of the preambles configured for use by non-SBFD communications devices, the response signal is completely contained in uplink OFDM symbols of the wireless access interface.
  • SSBs synchronisation signal blocks
  • a method of operating a subband full duplex, SBFD, communications device comprising receiving, from infrastructure equipment of a wireless communications network, an indication of a Physical Random Access Channel (PRACH) configuration, the PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by the infrastructure equipment, wherein the PRACH configuration comprises an indication of a plurality of mappings between the plurality of ROs and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, the ROs in each of the mappings being indexed, and the method comprises receiving a Physical Downlink Control Channel, PDCCH, Order from the infrastructure equipment instructing the SBFD communications device to transmit a PRACH to the infrastructure equipment, the PDCCH order comprising an index of an RO in which the PRACH is to be transmitted, wherein the PDCCH order for the SBFD communications device comprises an indication of one of
  • PRACH Physical Random
  • a method of operating infrastructure equipment of a wireless communications network comprising transmitting an indication of a Physical Random Access Channel (PRACH) configuration to a sub-band full duplex, SBFD, communications device, the PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured in communications resources of a wireless access interface provided by infrastructure equipment for the SBFD communications device, wherein the PRACH configuration comprises an indication of a plurality of mappings between the plurality of ROs and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, the ROs in each of the mappings being indexed, and the method comprises transmitting a Physical Downlink Control Channel, PDCCH, Order to the SBFD communications device to instruct the SBFD communications device to transmit a PRACH to the infrastructure equipment, the PDCCH order comprising an index of an RO in which the PRACH is to be transmitted, wherein the PDCCH order for the SBFD communications device comprises an indication of
  • PRACH Physical Random
  • a subband full duplex, SBFD, communications device comprising a transmitter configured to transmit signals, a receiver configured to receive signals, and a controller configured in combination with the transmitter and the receiver to receive, from infrastructure equipment of a wireless communications network, an indication of a first Physical Random Access Channel (PRACH) configuration, the first PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by the infrastructure equipment, wherein the first PRACH configuration is different from a second PRACH configuration configured for a non-SBFD communications device, wherein the controller is configured in combination with the transmitter and the receiver to determine one or more mappings between the plurality of ROs in the first PRACH configuration and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, wherein determining at least one of the mappings comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs in
  • Circuitry for a subband full duplex, SBFD, communications device comprising transmitter circuitry configured to transmit signals, receiver circuitry configured to receive signals, and controller circuitry configured in combination with the transmitter circuitry and the receiver circuitry to determine one or more mappings between a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured in communications resources of a wireless access interface provided by infrastructure equipment of a wireless communications network and a plurality of synchronisation signal blocks (SSBs) to be transmitted by the infrastructure equipment on a plurality of respective downlink beams, wherein determining at least one of the mappings comprises determining valid ROs by applying one or more validity conditions to the plurality of ROs configured in the communications resources of the wireless access interface, the one or more validity conditions comprising a first validity condition that valid ROs must be completely contained within uplink Orthogonal Frequency Division Multiplexing, OFDM, symbols in the communications resources of the wireless access interface, or a second validity condition that valid ROs must be completely contained within an uplink subband of
  • PRACH Physical Random Access
  • Circuitry for a subband full duplex, SBFD, communications device comprising transmitter circuitry configured to transmit signals, receiver circuitry configured to receive signals, and controller circuitry configured in combination with the transmitter circuitry and the receiver circuitry to receive, from infrastructure equipment of a wireless communications network, an indication of a first Physical Random Access Channel (PRACH) configuration, the first PRACH configuration comprising a plurality of Physical Random Access Channel (PRACH) Occasions (ROs) configured for the SBFD communications device in communications resources of a wireless access interface provided by the infrastructure equipment, wherein the first PRACH configuration is different from a second PRACH configuration configured for a non-SBFD communications device, wherein the controller circuitry is configured in combination with the transmitter circuitry and the receiver circuitry to receive a Physical Downlink Control Channel, PDCCH, Order from the infrastructure equipment instructing the SBFD communications device to transmit a PRACH to the infrastructure equipment, the PDCCH order comprising an index of an RO in which the PRACH is to be transmitted, wherein the PDCCH order for the SB
  • PRACH Physical Random Access

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Abstract

L'invention concerne un procédé de fonctionnement d'un dispositif de communication en duplex intégral de sous-bande (SBFD). Le procédé consiste à déterminer un ou plusieurs mappages entre une pluralité d'occasions de canal physique d'accès aléatoire (PRACH) (RO) configurées dans des ressources de communication d'une interface d'accès sans fil fournie par un équipement d'infrastructure d'un réseau de communication sans fil et une pluralité de blocs de signal de synchronisation (SSB) devant être transmis par l'équipement d'infrastructure sur une pluralité de faisceaux de liaison descendante respectifs. La détermination d'au moins l'un des mappages consiste en la détermination de RO valides par application d'une ou de plusieurs conditions de validité à la pluralité de RO configurées dans les ressources de communication de l'interface d'accès sans fil. La ou les conditions de validité comprennent une première condition de validité selon laquelle des RO valides doivent être complètement contenues dans des symboles de multiplexage par répartition orthogonale de la fréquence (OFDM) de liaison montante dans les ressources de communication de l'interface d'accès sans fil, ou une seconde condition de validité selon laquelle des RO valides doivent être complètement contenues dans une sous-bande de liaison montante de symboles OFDM SBFD dans les ressources de communication de l'interface d'accès sans fil. La détermination d'au moins l'un des mappages comprend en outre l'association de chacun des SSB à un nombre préconfiguré des RO valides.
PCT/EP2025/052275 2024-02-05 2025-01-29 Procédés, dispositifs de communication et équipement d'infrastructure pour accès aléatoire en duplex intégral de sous-bande Pending WO2025168417A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3545716A1 (fr) 2017-01-06 2019-10-02 Sony Corporation Appareils et procédés de télécommunications sans fil
US20210029737A1 (en) * 2017-11-27 2021-01-28 Idac Holdings, Inc. Initial access and channel access in new radio/new radio-unlicensed (nr/nr-u)
US20230254829A1 (en) * 2022-04-15 2023-08-10 Intel Corporation Uplink (ul) transmissions in full duplex (fd) systems
WO2024192688A1 (fr) * 2023-03-21 2024-09-26 Nec Corporation Dispositif, procédé et support lisible par ordinateur pour communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3545716A1 (fr) 2017-01-06 2019-10-02 Sony Corporation Appareils et procédés de télécommunications sans fil
US20210029737A1 (en) * 2017-11-27 2021-01-28 Idac Holdings, Inc. Initial access and channel access in new radio/new radio-unlicensed (nr/nr-u)
US20230254829A1 (en) * 2022-04-15 2023-08-10 Intel Corporation Uplink (ul) transmissions in full duplex (fd) systems
WO2024192688A1 (fr) * 2023-03-21 2024-09-26 Nec Corporation Dispositif, procédé et support lisible par ordinateur pour communication

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
HOLMA H.TOSKALA A: "LTE for UMTS OFDMA and SC-FDMA based radio access", 2009, JOHN WILEY AND SONS
RP-213591: "New SI: Study on evolution of NR duplex operation", CMCC, RAN#94E, December 2021 (2021-12-01)
RP-220633: "Revised SID: Study on evolution of NR duplex operation", CMCC, RAN#95E, March 2022 (2022-03-01)
SAMSUNG: "Enhancements to Initial Access Procedure for NR-U", vol. RAN WG1, no. Athens, Greece; 20190225 - 20190301, 15 February 2019 (2019-02-15), XP051599953, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F96/Docs/R1%2D1902258%2Ezip> [retrieved on 20190215] *
TR 38.913: "Study on Scenarios and Requirements for Next Generation Access Technologies (Release 14", 3RD GENERATION PARTNERSHIP PROJECT, V14.3.0, August 2017 (2017-08-01)
TS38.211: "Physical channels and modulation (Rel-18", V18.0.0, 3GPP
TS38.213: "Physical layer procedures for control (Rel-18", V18.0, 3GPP

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