EP4662822A1 - Procédés, dispositifs de communication et équipement d'infrastructure réseau - Google Patents

Procédés, dispositifs de communication et équipement d'infrastructure réseau

Info

Publication number
EP4662822A1
EP4662822A1 EP24704170.0A EP24704170A EP4662822A1 EP 4662822 A1 EP4662822 A1 EP 4662822A1 EP 24704170 A EP24704170 A EP 24704170A EP 4662822 A1 EP4662822 A1 EP 4662822A1
Authority
EP
European Patent Office
Prior art keywords
pdcch
regs
invalid
cces
band
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
EP24704170.0A
Other languages
German (de)
English (en)
Inventor
Shin Horng Wong
Yassin Aden Awad
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Europe BV, Sony Group Corp filed Critical Sony Europe BV
Publication of EP4662822A1 publication Critical patent/EP4662822A1/fr
Pending legal-status Critical Current

Links

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
    • H04L5/003—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
    • 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
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • 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
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Definitions

  • the present disclosure relates to a communications device, network infrastructure equipment and methods of operating a communications device to receive data from a wireless communications network.
  • Modern 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.
  • Wireless communications networks are expected to routinely and efficiently support communications with an ever-increasing range of devices associated with a wide range of data traffic profiles and types. For example, it is expected that wireless communications networks efficiently support communications with devices including reduced complexity devices, machine type communication (MTC) devices, high resolution video displays, virtual reality headsets and so on.
  • MTC machine type communication
  • 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 I 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).
  • Ultra Reliable Low Latency Communications URLLC
  • eMBB enhanced Mobile Broadband
  • 5G NR has continuously evolved and the current work plan includes 5G-NR-advanced in which some further enhancements are expected, especially to support new use- cases/scenarios with higher requirements.
  • the desire to support these new use-cases and scenarios gives rise to new challenges for efficiently handling communications in wireless communications systems that need to be addressed.
  • the present disclosure can help address or mitigate at least some of the issues discussed above.
  • a method of operating a communications device configured to transmit signals to and/or to receive signals from an infrastructure equipment of a wireless communications network via a wireless radio interface provided by the wireless communications network, the method comprising: detecting a collision between one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space and a nondownlink sub-band of a timing slot, wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device; based on detecting the collision between the one or more PDCCH candidates and the non-downlink sub-band, modifying the one or more PDCCH candidates that collide with the non-downlink sub-band to overcome the collision between the one or more PDCCH candidates and the non-downlink sub-band.
  • PDCCH physical downlink control channel
  • a method for an infrastructure equipment configured to transmit signals to and/or to receive signals from a communications device of a wireless communications network via a wireless radio interface provided by the wireless communications network, the method comprising: transmitting, to the communications device, an indication of one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space, the one or more PDCCH candidates indicating a first set of resources for the communications device to monitor for a PDCCH transmission; and based on detecting a collision between the one or more PDCCH candidates and a non-downlink sub-band of a timing slot, transmitting, for receipt by the communications device, a PDCCH using a second set of resources different to the first set of resources, the second set of resources having one or more modifications relative to the first set of resources, and wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the
  • 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
  • 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
  • FIG 4 illustrates an example division of system bandwidth into dedicated uplink and downlink sub-bands in Sub-band Full Duplex (SBFD);
  • Figure 5 illustrates additional examples of division of system bandwidth into dedicated uplink and downlink sub-bands in SBFD
  • Figure 6 illustrates three possible Control Resource Sets (CORESETs), each occupying differing numbers of orthogonal frequency division multiplexing (OFDM) symbols and having differing numbers of Resource Element Groups (REGs) and Control Channel Elements (CCEs);
  • CORESETs Control Resource Sets
  • OFDM orthogonal frequency division multiplexing
  • REGs Resource Element Groups
  • CCEs Control Channel Elements
  • FIG. 7 illustrates three possible CCE interleaver configurations for three CORESETS each having four CCEs
  • Figure 8 illustrates two example Physical Downlink Control Channel (PDCCH) Search Spaces, each having multiple PDCCH candidates with differing aggregation levels;
  • PDCCH Physical Downlink Control Channel
  • Figure 9 illustrates an example of a collision between a PDCCH Search Space and a nondownlink sub-band of an SBFD slot
  • Figure 10 illustrates an example of a CORESET which avoids collisions between a PDCCH Search Space and a non-downlink sub-band of an SBFD slot;
  • Figure 11 illustrates an example of a CORESET that is not aligned to the boundaries of an uplink sub-band of an SBFD slot
  • Figure 12 illustrates an example of configuring multiple CORESETS with different RBs to avoid collisions between a PDCCH Search Space and a non-downlink sub-band of an SBFD slot;
  • Figure 13 illustrates an example approach for dynamically reducing the aggregation level of a PDCCH candidate to avoid collisions between a PDCCH candidate and a non-downlink subband of an SBFD slot;
  • Figure 14 illustrates an example approach for dynamically relocating invalid CCEs in time;
  • Figure 15 illustrates an example approach for repeating invalid CCEs of a PDCCH candidate having invalid CCEs
  • Figure 16 illustrates an example approach for dynamically relocating invalid CCEs in the frequency domain
  • Figure 17 illustrates an example approach for dynamically reconfiguring a CORESET when a collision between a CORESET and an uplink sub-band of an SBFD slot
  • Figure 18 illustrates an example approach for dynamically relocating a set of CCEs of a PDCCH candidate
  • Figure 19 illustrates an example approach for dynamically relocating invalid REG bundles
  • Figure 20 illustrates an example approach for dynamically changing interleaved CCEs to noninterleaved CCEs
  • Figure 21 illustrates an example approach for modifying a PDCCH candidate based on the presence of an uplink transmissions within a threshold period of time.
  • Figure 22 shows a flow diagram for a method for operating a communications device according to the present disclosure.
  • Figure 23 shows a flow diagram for a method for infrastructure equipment according to the present disclosure.
  • 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 or mobile terminals (MT) 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.
  • the communications or terminal devices 4 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
  • 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 (Dlls) 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.
  • each of the TRPs 10 forms a cell of the wireless communications network as represented by a circle 12.
  • wireless communications devices 14 which are within a radio communications range provided by the cells 12 can transmit and receive signals to and from the TRPs 10 via the wireless access interface.
  • Each of the distributed units 41 , 42 are connected to a central unit (CU) 40 (which may be referred to as a controlling node) via an interface 46.
  • the central unit 40 is then connected to the core network 20 which may contain all other functions required to transmit data for communicating to and from the wireless communications devices and the core network 20 may be connected to other networks 25.
  • the elements of the wireless access network shown in Figure 2 may operate in a similar way to corresponding elements of an LTE network as described with regard to the example of Figure 1. It will be appreciated that operational aspects of the telecommunications network represented in Figure 2, and of other networks discussed herein in accordance with embodiments of the disclosure, which are not specifically described (for example in relation to specific communication protocols and physical channels for communicating between different elements) may be implemented in accordance with any known techniques, for example according to currently used approaches for implementing such operational aspects of wireless telecommunications systems, e.g. in accordance with the relevant standards.
  • the TRPs 10 of Figure 2 may in part have a corresponding functionality to a base station or eNodeB of an LTE network.
  • the communications devices 14 may have a functionality corresponding to the UE devices 4 known for operation with an LTE network.
  • operational aspects of a new RAT network may be different to those known from LTE or other known mobile telecommunications standards.
  • each of the core network component, base stations and communications devices of a new RAT network will be functionally similar to, respectively, the core network component, base stations and communications devices of an LTE wireless communications network.
  • the core network 20 connected to the new RAT telecommunications system represented in Figure 2 may be broadly considered to correspond with the core network 2 represented in Figure 1
  • the respective central units 40 and their associated distributed units I TRPs 10 may be broadly considered to provide functionality corresponding to the base stations 1 of Figure 1.
  • the term network infrastructure equipment I access node may be used to encompass these elements and more conventional base station type elements of wireless telecommunications systems.
  • the responsibility for scheduling transmissions which are scheduled on the radio interface between the respective distributed units and the communications devices may lie with the controlling node I central unit and I or the distributed units I TRPs.
  • a communications device 14 is represented in Figure 2 within the coverage area of the first communication cell 12. This communications device 14 may thus exchange signalling with the first central unit 40 in the first communication cell 12 via one of the distributed units I TRPs 10 associated with the first communication cell 12.
  • 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 I 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 implementation is not of primary significance to the principles described herein. In this regard, 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 I access node and the communications device will depend on the network infrastructure for the implementation 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 I 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 I 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 circuit 49, a receiver circuit 48 and a controller circuit 44 which is configured to control the transmitter circuit 49 and the receiver circuit 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 circuit 30 and received by the receiver circuit 48 in accordance with the conventional operation.
  • the transmitter circuits 30, 49 and the receiver circuits 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 controller circuits 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) I circuitry I chip(s) I chipset(s).
  • the infrastructure equipment I TRP I base station as well as the UE I 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 TRP10 to the DU 42 and the F1 interface 46 from the DU 42 to the CU 40.
  • NR/5G networks can operate using Time Division Duplex (TDD), where an entire frequency band or carrier is switched to either downlink or uplink transmissions for a time period and can be switched to the other of downlink or uplink transmissions at a later time period.
  • TDD operates in Half Duplex mode (HD-TDD) where the gNB or UE can, at a given time, either transmit or receive packets, but not both at the same time.
  • HD-TDD Half Duplex mode
  • a proposed new feature of such networks is to enhance duplexing operation for Time Division Multiplexing (TDD) by enabling Full Duplex operation in TDD (FD-TDD) [2],
  • TDD Time Division Multiplexing
  • FD-TDD Full Duplex operation in TDD
  • a gNB can transmit and receive data to and from the UEs at the same time on the same frequency band or carrier.
  • a UE can operate either in HD-TDD or FD-TDD mode, depending on its capability.
  • FD-TDD is achieved at the gNB by scheduling a downlink (DL) transmission to a first UE and scheduling an uplink (UL) transmission from a second UE within the same orthogonal frequency division multiplexing (OFDM) symbol (i.e. at the same time).
  • OFDM orthogonal frequency division multiplexing
  • FD-TDD is achieved both at the gNB and the UE, where the gNB can simultaneously schedule this UE with DL and UL transmissions within the same OFDM symbol by scheduling the DL and UL transmissions at different frequencies (e.g. physical resource blocks (PRBs)) of the system bandwidth.
  • PRBs physical resource blocks
  • a gNB or UE is allowed to transmit and receive data at the same time (as with FD-TDD), the traffic latency will be improved.
  • UEs are usually limited in the UL transmissions when located close to the edge of a cell. While the UE coverage at the cell-edge can be improved if more time domain resources are assigned to UL transmissions (e.g. repetitions), if the UL direction is assigned more time resources, fewer time resources can be assigned to the DL direction, which can lead to system imbalance. Enabling FD-TDD would help allow a UE to be assigned more UL time resources when required, without sacrificing DL time resources.
  • SBFD Sub-band Full Duplex
  • the system i.e. UE/gNB bandwidth, or Bandwidth Part (BWP) is divided into non-overlapping sub-bands 401-403 allocated to UL or DL, as shown in Figure 4, where simultaneous DL and UL transmissions may occur in different sub-bands 401-403, i.e. in different sets of frequency Resource Blocks (RB).
  • RB Resource Blocks
  • SBFD Sub-band Full Duplex
  • Figure 4 shows the system bandwidth as being divided into three subbands, substantially any number of sub-bands could be used.
  • the system bandwidth may be divided into four sub-bands, which may include two downlink sub-bands and two uplink sub-bands, however other sub-band arrangements are envisioned.
  • a guard sub-band 410 may be configured between UL and DL subbands 401-403.
  • An example is shown in Figure 4, where a TDD system bandwidth is divided into three sub-bands 401 , 402, 403: Sub-band#1 401 , Sub-band#2 402 and Sub-band#3 403, such that Sub-band#1 401 and Sub-band#3 403 are used for DL transmissions whilst Sub- band#2 402 is used for UL transmissions.
  • Guard sub-bands 410 are configured between DL Sub-band#3 403 and UL Sub-band#2 402 and between UL Sub-band#2 402 and DL Subband#! 401.
  • the arrangement of sub-bands 401-403 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.
  • SBFD may not necessarily be configured for all slots or OFDM symbols. That is, in some slots or OFDM symbols, there are may be no sub-bands and the slots/symbols may be either fully downlink or uplink, whilst in other slots/OFDM symbols SBFD may be configured where there are DL and U L sub-bands.
  • the sub-band format shown in Figure 4 is merely an example of a sub-band arrangement, and that other sub-band arrangements may be implements.
  • Figure 5 shows two examples of sub-band arrangements, where the size of the sub-bands may be different from one another.
  • the UL sub-band is at the lower portion of the bandwidth whilst the DL sub-band is at the upper portion of the bandwidth.
  • the DL sub-band and UL sub-band are at the lower and upper portions of the bandwidth respectively.
  • PDCCH Physical Downlink Control Channel
  • Downlink Control Information such as a UL grant and a DL grant to schedule a PUSCH and PDSCH respectively, Group Common DCI that signals control information to multiple UEs such as slot format indicator (SFI), DL Pre-emption Indicators, and UL Pre-emption indicators, are carried by a Physical Downlink Control Channel (PDCCH).
  • a UE may monitor for a PDCCH by blind decoding for the PDCCH in a periodically occurring PDCCH Search Space, where the PDCCH Search Space uses resources defined in a Control Resource Set (CORESET).
  • the frequency and time physical resources in the downlink occupied by a PDCCH are configured in a CORESET.
  • a UE can be configured with a maximum of 12 or 16 CORESETs per serving cell, where each CORESET contains one or more PDCCH Search Spaces. However, a UE can only monitor up to 3 CORESETs in a BWP.
  • the duration of a CORESET, Nc-symboi can occupy up to 3 OFDM symbols and is RRC configured in the RRC parameter duration of the Control Resource Set Information Element (IE).
  • the exact time location of the CORESET is dependent upon the time location of the PDCCH Search Spaces using the CORESET.
  • the number of RBs, NC-RB, in a CORESET is configured via the RRC parameter frequencyDomainResources of the ControlResourceSet IE, which consists of a 45 bit bitmap where each bit represents 6 RBs. That is, the CORESET is configured in multiples of 6 RBs.
  • a Resource Element Group is a unit in a CORESET which occupies one RB and one OFDM symbol.
  • the REGs are indexed in time first followed by frequency and several contiguous indexed REGs can be bundled, where REGs in a bundle have the same precoding, which increases the number of reference signals (RS) for channel estimation.
  • RS reference signals
  • the CORESETs 610(1)-(3) have 24, 48 and 72 REGs respectively.
  • a Control Channel Element (CCE) consists of 6 REGs where the CCE to REG mapping can be non-interleaved or interleaved.
  • the interleaver function for the CCE depends on the REG bundle size L Bun die, the number of REGs NREG, and an interleaver size Rmterieave [3].
  • a PDCCH Search Space is a set of resources in which a PDCCH may be carried and can be a Common Search Space (CSS) or UE Specific Search Space (USS).
  • a CSS may be the same for all UEs, for example to schedule SIBs, Random Access Channel (RACH) signaling such as Random Access (RA) & Message 3 and paging, or for a group of UEs, for example indicate Slot Format Indicator (SFI), DL Pre-emption Indicator and UL Cancellation Indicator.
  • a USS is configured specifically for a particular UE and it is used for UL Grant, DL Grant and activation DCIs for SPS and CG-PUSCH.
  • a UE can be configured with multiple CSS and USS, which can have different periodicities and starting offsets relative to a radio frame.
  • the AL used by the gN B for a PDCCH is not signaled to the UE and as such the UE blind decodes for the PDCCH.
  • a PDCCH Search Space that has a limited number of PDCCH candidates is used.
  • the PDCCH candidates of a PDCCH Search Space are signaled to the UE, e.g. via RRC signaling, and the UE only attempts to blind decode for these PDCCH candidates.
  • a PDCCH candidate is a set of specific time and frequency resources a UE monitors within a PDCCH Search Space.
  • a CORESET can contain one or more PDCCH Search Spaces, where each PDCCH Search Space has a set of PDCCH candidates which are defined by their AL and the CCEs they occupy.
  • CCEO to CCE7
  • the gNB configures two PDCCH Search Spaces using this CORESET, i.e.
  • USS#1 and USS#2 which can be for two different UEs. If the PDCCH candidates in each AL do not overlap, potentially this CORESET can have up to 15 PDCCH candidates. In this example, only a subset of possible PDCCH candidates are configured for USS#1 and USS#2. In USS#1 , 8 PDCCH candidates are configured labelled as C1-0 to C1-7, which consists of 4 x AL1 (C1-0 - C1-3), 2 x AL2 (C1-4 and C1-5), 1 x AL4 (C1-6) and 1 x AL8 (C1-7).
  • USS#2 contains 6 PDCCH candidates labelled as C2-0 to C2-5, which consists of 3 x AL1 (C2-0 - C2-2), 2 x AL1 (C2-3 and C2-4) and 1 x AL4 (C2-5).
  • the gNB can transmit two PDCCHs, one in each USS, as long as their CCEs do not overlap. That is, the gNB can transmit PDCCH candidate C1-6 in USS#1 to UE1 and transmit PDCCH candidate C2-3 in USS#2 to UE2, since PDCCH candidate C1-6 occupies CCE4, CCE5, CCE6 and CCE7 whilst PDCCH candidate C2-3 occupies CCE2 and CCE3, that is, their CCEs do not overlap. If the gNB transmits using PDCCH candidate C1-7 in USS#1 that occupies all the CCEs in the CORESET then it is not possible for the gNB to simultaneously transmit another PDCCH in USS#2, even to a different UE.
  • a PDCCH Search Space 910 starting in Slot n has a periodicity of 2 slots and at Slot n+2, the PDCCH Search Space 910 overlaps with the UL sub-band 930. Since the UL sub-band 930 does not exist in some TDD systems, the PDCCH monitoring and blind decoding in the PDCCH Search Space 930 that overlaps with UL sub-band 930 is impacted.
  • a PDCCH Search Space can be configured to avoid UL sub-bands or Guard sub-bands. This can be done in the time and/or frequency domain. In the time domain, the periodicity and time offset of the PDCCH Search Space can be configured such that it always falls onto a DL slot or DL OFDM symbols in a slot. However, this limits the flexibility of the gNB in configuring the PDCCH Search Space.
  • the PDCCH Search Space 910 needs to be configured to start in a DL slot, e.g., Slot n and has a periodicity that is a multiple of 5 slots.
  • a UE would be configured to monitor multiple PDCCH Search Spaces 910, which may be configured to support certain traffic, and as there is a limit on the number of blind decodings a UE can perform within a slot, these multiple PDCCH Search Spaces may not all be configured within the single DL slot. Accordingly, limiting the PDCCH Search Space to DL-only slots would impact the existing performance of the UE.
  • the CORESET can be configured to avoid overlapping the UL sub-band, so that the PDCCH Search Spaces within this CORESET do not collide with the UL sub-band. Since the RRC parameter frequencyDomainResources that configures the frequency resource of the CORESET is a 45 bit bitmap, the CORESET can be configured to avoid overlapping the UL sub-band.
  • a CORESET 1010 i.e. PDCCH Search Space
  • a CORESET 1010 is configured with discontinuous RBs 1010(1 )-(4) to avoid the UL sub-band 930 in the middle of the BWP, regardless of whether the UL sub-band 930 exists or not in a slot.
  • Slot n+2 includes two downlink sub-bands 920(1), 920(2) and an uplink sub-band 930, and as such the discontinuous sections 1010(3)-(4) of the CORESET 1010 avoid the UL sub-band 930.
  • this discontinuity in the CORESET 1010 occurs for all instances of that CORESET 1010.
  • the CORESET 1010 includes discontinuous section 1010(1 )-(2), despite the UL sub-band 930 not being present in Slot n.
  • the CORESET 1010 underutilizes the available DL resources in slots that are fully DL (e.g. Slot n), as shown in Figure 10.
  • the bits in the 45 bit bitmaps corresponding to the UL sub-band 930 are set to “0” to avoid the UL sub-band and so cannot be used to carry PDCCH, and this is the case for all instances of the CORESET 1010. As such, this configuration assumes that the UL sub-band and Guard sub-band locations do not change dynamically.
  • Another approach to avoid collision/overlap between an UL or Guard sub-band CORESET/PDCCH Search Space is to over-configure the number of CORESETs and PDCCH Search Spaces for the same service, so that one set of CORESETs and PDCCH Search Spaces is used in DL slots/symbols whilst another set is used in SBFD slots/symbols.
  • An example is shown in Figure 12, where a slot format pattern of 5 slots consisting of a DL slot followed by 3 SBFD slots and ends with an UL slot is repeated.
  • Two CORESETs, CORESET#1 1210 and CORESET#2 1215 are configured, where CORESET#1 1210 is used in DL slot and CORESET#2 1215 is used in SBFD slots.
  • a UE can be configured with up to 15 CORESETs per carrier, it is limited to 3 CORESETs per BWP.
  • over-configuring the number of CORESETs and PDCCH Search Spaces uses up the limited number of CORESETs, which may not be feasible if the UE already uses all the 3 CORESETs to support its required services.
  • this approach assumes that the UL and Guard sub-bands are semi-static and cannot change dynamically.
  • the present inventors have identified an approach for addressing potential collisions between PDCCH Search Spaces and UL sub-bands that does not reduce PDCCH occasions, and is capable of utilizing the resources of DL slots without requiring over-configuring the number of CORESETs to support the required services, as well as adapt to dynamic changes to UL subbands.
  • the PDCCH candidates in a PDCCH Search Space are dynamically modified to adapt to changes in slot structure.
  • the PDCCH candidates change to adapt the presence of an UL or Guard sub-band.
  • this approach is suitable for implementations where the time and frequency locations of the UL sub-band and Guard sub-band can change dynamically.
  • PDCCH candidates with CCEs colliding with invalid RBs may be modified. That is, CCEs colliding with invalid RBs may not be usable by the gNB, and as such the PDCCH candidate including these CCEs is affected.
  • an invalid CCE is a CCE that collides fully or partially with one or more invalid RBs (i.e. has one or more REGs that overlap with a non-downlink sub-band).
  • invalid RBs may be defined as RBs that are not in a DL sub-band, i.e., RBs in an UL sub-band or a Guard sub-band. That is invalid RBs are RBs that are not used for DL transmissions.
  • invalid RBs may be defined as RBs in an UL sub-band, i.e., RBs used for UL transmissions.
  • CCEs colliding with a Guard sub-band are not affected. This is beneficial for cases where the UE is not aware of the locations of the Guard sub-bands (i.e. the gNB manages the Guard sub-bands via scheduling that is not signaled to the UE). In this case, the UE would assume that the RBs occupied by the Guard sub-band contains a DL transmission even if nothing is transmitted there.
  • the modifications or changes to the PDCCH candidates includes reducing the Aggregation Level (AL) of the PDCCH candidate.
  • a PDCCH Search Space with 7 PDCCH candidates (labelled as CO to C6) uses this CORESET, and consequently some of its PDCCH candidates overlap with invalid RBs (i.e.
  • the AL of the PDCCH candidates are reduced to remove invalid CCEs from the PDCCH candidates.
  • the PDCCH consists of one or more CCEs and that if a subset of CCEs contributing to a PDCCH candidate are invalid, then these CCEs can be discounted from that PDCCH candidate thereby reducing its AL.
  • the threshold Tmvaiid-ccE can be fixed in the specifications or signaled to the UE (e.g. via RRC signaling). A UE does not need to consider (i.e. monitor) a dropped PDCCH candidate in a PDCCH Search Space, thereby reducing the number of blind PDCCH decodings.
  • the threshold Tmvaiid-ccE may be half the AL of the PDCCH candidate.
  • PDCCH candidate C5 is dropped.
  • the threshold Tmvaiid-ccE 1 , i.e., if any of the CCEs in a PDCCH candidate is invalid, that PDCCH candidate is dropped.
  • the invalid CCEs are moved in time to other OFDM symbols, and in this example CCEO and CCE1 are moved to the 5 th and 6 th OFDM symbol of the slot. Note that even though only some of the REGs of CCE1 are invalid, CCE1 is deemed to be an invalid CCE, and as such the entire CCE is relocated.
  • the AL of PDCCH candidates with invalid CCEs are firstly reduced to the nearest valid AL, i.e., halved, and then the reduced AL PDCCH candidate is repeated.
  • This example compensates for the loss of a PDCCH candidate with reduced AL, by repetitions.
  • An example is shown in Figure 15, where a PDCCH Search Space resides in a CORESET of 8 CCEs and 2 of its CCEs, CCEO and CCE1 are invalid.
  • invalid CCEs may be relocated or replaced in the frequency domain but not the time domain.
  • An example is shown Figure 16, where a CORESET partially overlaps the UL sub-band in a slot.
  • the invalid CCEs are relocated to the bottom portion of the DL sub-band.
  • the frequency resources to which the invalid CCEs are to be relocated can be signaled to the UE (e.g. via RRC signaling) or defined in the specifications.
  • a frequency offset may be configured or predefined for the relocation of invalid CCEs.
  • the UE may apply a second CORESET that is different than the first CORESET, such that the second CORESET does not collide with UL sub-band and or Guard sub-band as shown on Figure 17.
  • the second CORESET is pre-configured for the UE, and it is only used when collision occurs.
  • both the time and frequency resources for invalid CCEs may be modified (i.e. the CCEs are moved in both time and frequency).
  • the time and frequency resources for relocation of invalid CCEs can be signaled to the UE (e.g. via RRC signaling) or defined in the specifications.
  • CCEO and CCE1 are invalid and hence in this example, all the CCEs in Set 1 are relocated to another resource (in time and/or frequency).
  • the number and/or size of the CCE sets may be dependent upon the number of invalid CCEs. For example, if the number of invalid CCEs is less than half of the total CCEs, the CCEs in the CORESET may be divided into two equal sets. Conversely, if the number of invalid CCEs is more than half the total of CCEs, the CCEs in the CORESET may be divided into 4 equal sets.
  • each relocated CCE set may be a repetition of a CCE set that is not relocated.
  • the relocated Set 1 becomes a repetition of the un-relocated Set 2 (i.e. uses the same set of frequency resources as Set 2).
  • the PDCCH candidates in Set 2 may then be changed using one of the previous embodiments. For example, the AL of the PDCCH candidates with the relocated CCEs may be reduced to the nearest valid AL.
  • REGs i.e. REG bundles
  • REGs 1 to 10 which include REGs belonging to each of CCEs 1-4, collide with invalid RBs and are therefore themselves invalid.
  • the impacted REGs, or the REG bundles are relocated in time and frequency, thereby ensuring all the CCEs can be used for a PDCCH candidate.
  • the examples of the present disclosure may be carried out at the level of individual REGs or REG bundles, as well as at the CCE, CCE set or PDCCH candidate level.
  • the above examples have primarily modified a PDCCH candidate by modifying the time/frequency resources of the REGs/CCEs, or by discarding/dropping invalid REGs/CCEs.
  • the PDCCH candidate may be modified to avoid a collision in other ways in addition to those described above.
  • a CORESET with interleaved CCEs may be changed to non-interleaved CCEs, if at least a subset of its CCEs is invalid.
  • An example is shown in Figure 20, where a CORESET has 4 interleaved CCEs labeled as CCEO, CCE1 , CCE2 and CCE4.
  • the CCEs may be modified to be non-interleaved CCEs. As shown in the right-hand side of Figure 20, this reduces the number of invalid CCEs from 4 (i.e. , all of them) to only 2 (i.e., CCEO and CCE1). Accordingly, only CCEO and CCE1 require further modification to avoid a collision (for example in the ways described above).
  • a reduction in AL of a PDCCH candidates with invalid CCEs can be combines with changing interleaved CCEs to noninterleaved CCEs of a CORESET.
  • the PDCCH candidate may be modified only if other additional conditions are met.
  • PDCCH candidates with invalid CCEs in a CORESET may only be modified if there are UL transmissions scheduled for the UE within a time window OUL (e.g. a particular number of OFDM symbols) after the end of that CORESET.
  • OUL e.g. a particular number of OFDM symbols
  • the PDCCH candidates with invalid CCEs are not changed.
  • the UE may then blindly decode for a PDCCH using the original PDCCH candidates in the PDCCH Search Space.
  • the gNB can perform DL transmissions on the RBs in the UL sub-band. That is, the gNB may transmit a PDCCH with CCEs in the UL sub-band of the CORESET. Conversely, if the PUSCH were located within window OUL, the UE may determine that the gNB will not transmit a PDCCH using the RBs in the UL sub-band and may modify the PDCCH candidate to avoid any collision.
  • the value of OUL may be, for example, the timing advance offset applied by the UE for UL transmissions or the value of OUL is RRC signaled or defined in the specifications.
  • FIG. 22 shows a flow diagram for a method 2200 for operating a communications device according to the present disclosure.
  • the method 2200 includes a step 2210 of detecting a collision between one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space and a non-downlink sub-band of a timing slot, wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a nondownlink sub-band for the communications device.
  • PDCCH physical downlink control channel
  • REGs invalid resource element groups
  • the method then includes a step 2220 of, based on detecting the collision between the one or more PDCCH candidates and the nondownlink sub-band, modifying the one or more PDCCH candidates that collide with the nondownlink sub-band to overcome the collision between the one or more PDCCH candidates and the non-downlink sub-band.
  • Figure 23 shows a flow diagram for a method 2300 for infrastructure equipment according to the present disclosure.
  • the method 2300 includes a step 2310 of transmitting, to the communications device, an indication of one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space, the one or more PDCCH candidates indicating a first set of resources for the communications device to monitor for a PDCCH transmission.
  • PDCCH physical downlink control channel
  • the method then includes a step 2320 of based on detecting a collision between the one or more PDCCH candidates and a non-downlink sub-band of a timing slot, transmitting, for receipt by the communications device, a PDCCH using a second set of resources different to the first set of resources, the second set of resources having one or more modifications relative to the first set of resources, and wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device.
  • REGs resource element groups
  • a collision is detected and, in response to detecting the collision, the PDCCH candidate is modified.
  • the PDCCH candidate can be modified by reducing the aggregation level of the PDCCH candidate, relocating resources of the PDCCH candidate in time and/or frequency, and/or altering an interleaving of the PDCCH candidate resources.
  • a method of operating a communications device configured to transmit signals to and/or to receive signals from an infrastructure equipment of a wireless communications network via a wireless radio interface provided by the wireless communications network, the method comprising: detecting a collision between one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space and a non-downlink sub-band of a timing slot, wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device; and based on detecting the collision between the one or more PDCCH candidates and the non-downlink sub-band, modifying the one or more PDCCH candidates that collide with the non-downlink sub-band to overcome the collision between the one or more PDCCH candidates and the nondownlink sub-band.
  • PDCCH physical downlink control channel
  • the PDCCH search space includes a control resource set (CORESET) comprising a set of REGs for monitoring for PDCCH transmissions, and wherein the one or more PDCCH candidates are each a set of one or more control channel elements (CCEs) which the communications device is configured to monitor for PDCCH transmissions, wherein the one or more CCEs each comprise a plurality of REGs of the set of REGs included in the CORESET.
  • CORESET control resource set
  • CCEs control channel elements
  • non-downlink sub-band is an uplink sub-band and/or a guard sub-band. 4. The method according to clause 3, wherein the non-downlink sub-band is an uplink sub-band.
  • modifying the one or more PDCCH candidates includes reducing an aggregation level of the one or more PDCCH candidates, wherein the aggregation level is a number of control channel elements (CCEs) in a PDCCH candidate.
  • CCEs control channel elements
  • reducing the aggregation level comprises reducing the aggregation level to a nearest aggregation level included in a set of predefined aggregation levels.
  • reducing the aggregation level comprises dropping the one or more PDCCH candidates based on a number of invalid REGs or CCEs in the PDCCH candidate exceeding a predetermined threshold.
  • the predetermined threshold is a minimum aggregation level in a set of predefined aggregation levels.
  • modifying the one or more PDCCH candidates further comprises dropping one of two or more duplicate PDCCH candidates, the duplicate PDCCH candidates being formed by the reduction of the aggregation level.
  • modifying the one or more PDCCH candidates includes relocating the one or more invalid REGs of the one or more PDCCH candidates in the time and/or frequency domains.
  • relocating the one or more invalid REGs comprises relocating the one or more invalid REGs in a time domain.
  • relocating the one or more invalid REGs in a time domain comprises removing one or more REGs from the PDCCH candidate and repeating the one or more removed REGs in the time domain.
  • repeating the one or more invalid REGs in the time domain comprises repeating one or more invalid CCEs, including the one or more REGs, in the time domain.
  • repeating the one or more invalid CCEs in the time domain comprises repeating the one or more PDCCH candidates in the time domain.
  • modifying the one or more PDCCH candidates includes relocating the REGs in a frequency domain.
  • relocating the one or more invalid REGs comprises relocating one or more invalid CCEs, wherein the one or more invalid CCEs each comprise one or more invalid REGs.
  • modifying the one or more PDCCH candidates comprises relocating a set of multiple CCEs, the set of CCEs including one or more invalid CCEs.
  • a CORESET for the PDCCH search space includes a plurality of non-overlapping sets of CCEs.
  • the CORESET for the PDCCH search space is an interleaved CORESET including interleaved CCEs
  • modifying the one or more PDCCH candidates comprises changing the interleaved CORESET to a noninterleaved CORESET.
  • a communications device comprising: a transceiver configured to transmit signals to and/or to receive signals from an infrastructure equipment of a wireless communications network and/or one or more other communications devices, and a controller configured in combination with the transceiver to: detect a collision between one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space and a non-downlink sub-band of a timing slot, wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device; and based on detecting the collision between the one or more PDCCH candidates and the non-downlink sub-band, modify the one or more PDCCH candidates that collide with the non-downlink sub-band to overcome the collision between the one or more PDCCH candidates and the non-downlink sub-band.
  • PDCCH physical downlink control channel
  • Circuitry for a communications device comprising: transceiver circuitry configured to transmit signals to and/or to receive signals from an infrastructure equipment of a wireless communications network and/or one or more other communications devices, and controller circuitry configured in combination with the transceiver to: detect a collision between one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space and a non-downlink sub-band of a timing slot, wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device; based on detecting the collision between the one or more PDCCH candidates and the nondownlink sub-band, modify the one or more PDCCH candidates that collide with the nondownlink sub-band to overcome the collision between the one or more PDCCH candidates and the non-downlink sub-band.
  • PDCCH physical downlink control channel
  • a method for an infrastructure equipment configured to transmit signals to and/or to receive signals from a communications device of a wireless communications network via a wireless radio interface provided by the wireless communications network, the method comprising: transmitting, to the communications device, an indication of one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space, the one or more PDCCH candidates indicating a first set of resources for the communications device to monitor for a PDCCH transmission; and based on detecting a collision between the one or more PDCCH candidates and a non-downlink sub-band of a timing slot, transmitting, for receipt by the communications device, a PDCCH using a second set of resources different to the first set of resources, the second set of resources having one or more modifications relative to the first set of resources, and wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device.
  • PDCCH physical
  • the first set of resources is indicated by a control resource set (CORESET) comprising a set of REGs for monitoring for PDCCH transmissions
  • the one or more PDCCH candidates are each a set of one or more control channel elements (CCEs) for monitoring by the communications device for PDCCH transmissions, wherein the one or more CCEs each comprise a plurality of REGs of the set of REGs included in the CORESET.
  • CORESET control resource set
  • CEs control channel elements
  • the one or more modifications to the first set of resources include reducing an aggregation level of the one or more PDCCH candidates, wherein the aggregation level is a number of control channel elements (CCEs) in a PDCCH candidate.
  • CCEs control channel elements
  • reducing the aggregation level comprises reducing the aggregation level to a nearest aggregation level included in a set of predefined aggregation levels.
  • reducing the aggregation level comprises dropping the one or more PDCCH candidates based on a number of invalid REGs or CCEs in the PDCCH candidate exceeding a predetermined threshold.
  • the predetermined threshold is a minimum aggregation level in a set of predefined aggregation levels.
  • relocating the one or more invalid REGs comprises relocating the one or more invalid REGs in a time domain.
  • relocating the one or more invalid REGs in a time domain comprises removing one or more REGs from the PDCCH candidate and repeating the one or more removed REGs in the time domain.
  • repeating the one or more invalid CCEs in the time domain comprises repeating the one or more PDCCH candidates in the time domain.
  • relocating the one or more invalid REGs comprises relocating one or more invalid CCEs, wherein the one or more invalid CCEs each comprise one or more invalid REGs.
  • a CORESET for the PDCCH search space includes a plurality of non-overlapping sets of CCEs.
  • the CORESET includes a first set of CCEs and a second set of CCEs, wherein the first set of CCEs are relocated in the time domain and relocated in the frequency domain to the same frequency resources as the second set of CCEs.
  • An infrastructure equipment comprising: a transceiver configured to transmit signals to and/or receive signals from a plurality of communications devices, and a controller configured in combination with the transceiver to: transmit, to the communications device, an indication of one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space, the one or more PDCCH candidates indicating a first set of resources for the communications device to monitor for a PDCCH transmission; and based on detecting a collision between the one or more PDCCH candidates and a nondownlink sub-band of a timing slot, transmit, for receipt by the communications device, a PDCCH using a second set of resources different to the first set of resources, the second set of resources having one or more modifications relative to the first set of resources, and wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device.
  • PDCCH physical downlink control
  • Circuitry for an infrastructure equipment comprising: transceiver circuitry configured to transmit signals to and/or receive signals from a plurality of communications devices, and controller circuitry configured in combination with the transceiver to: transmit, to the communications device, an indication of one or more physical downlink control channel (PDCCH) candidates of a PDCCH search space, the one or more PDCCH candidates indicating a first set of resources for the communications device to monitor for a PDCCH transmission; and based on detecting a collision between the one or more PDCCH candidates and a nondownlink sub-band of a timing slot, transmit, for receipt by the communications device, a PDCCH using a second set of resources different to the first set of resources, the second set of resources having one or more modifications relative to the first set of resources, and wherein detecting the collision comprises determining that the one or more PDCCH candidates include one or more invalid resource element groups (REGs), the one or more invalid REGs overlapping a non-downlink sub-band for the communications device.
  • PDCCH physical

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des dispositifs de communication, un équipement d'infrastructure et un circuit permettant de surmonter une collision entre un PDCCH candidat et une sous-bande de liaison non descendante. Une collision est détectée et, en réponse à la détection de la collision, le PDCCH candidat est modifié. Le PDCCH candidat peut être modifié en réduisant le niveau d'agrégation du PDCCH candidat, en relocalisant les ressources du PDCCH candidat dans le temps et/ou la fréquence, et/ou en modifiant un entrelacement des ressources PDCCH candidates.
EP24704170.0A 2023-02-10 2024-02-08 Procédés, dispositifs de communication et équipement d'infrastructure réseau Pending EP4662822A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23156051 2023-02-10
PCT/EP2024/053213 WO2024165687A1 (fr) 2023-02-10 2024-02-08 Procédés, dispositifs de communication et équipement d'infrastructure réseau

Publications (1)

Publication Number Publication Date
EP4662822A1 true EP4662822A1 (fr) 2025-12-17

Family

ID=85225097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24704170.0A Pending EP4662822A1 (fr) 2023-02-10 2024-02-08 Procédés, dispositifs de communication et équipement d'infrastructure réseau

Country Status (2)

Country Link
EP (1) EP4662822A1 (fr)
WO (1) WO2024165687A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021510969A (ja) * 2018-01-11 2021-04-30 ノキア テクノロジーズ オサケユイチア ブラインド探索を管理するための装置および方法
US11425705B2 (en) * 2019-02-28 2022-08-23 Electronics And Telecommunication Research Institute Method and apparatus for transmitting and receiving control information in communication system supporting unlicensed band
US11690073B2 (en) * 2020-07-01 2023-06-27 Qualcomm Incorporated Physical downlink control channel and synchronization signal block collision

Also Published As

Publication number Publication date
WO2024165687A1 (fr) 2024-08-15

Similar Documents

Publication Publication Date Title
US11336415B2 (en) System and method for enabling reliable and low latency communication
US11012999B2 (en) Method and apparatus for indicating time domain resource allocation of data transmission in a wireless communication system
TWI773413B (zh) 來自複數個發送接收點(m-trp)的下行鏈路控制資訊(dci)接收可靠性增強
EP2498419B1 (fr) Procédé duplex par division temporelle flexible et appareil pour système de communication
EP3577830B1 (fr) Conception d'un canal physique de commande de liaison montante (pucch) court pour nouvelle radio (nr) de 5ème génération (5g)
WO2018036560A1 (fr) Système et procédé de multiplexage de trafic
US12119923B2 (en) Methods and infrastructure equipment
WO2018028692A1 (fr) Procédés et appareil pour accès cellulaire par l'intermédiaire d'une porteuse d'ancrage
EP4205328B1 (fr) Procédés, dispositifs de communication et équipement d'infrastructure
US11283560B2 (en) Methods, communications device and infrastructure equipment
EP3545715B1 (fr) Appareil et procédés de télécommunication sans fil
WO2024065741A1 (fr) Commutation d'émetteur et intervalles de commutation pour des communications sans fil
WO2024165687A1 (fr) Procédés, dispositifs de communication et équipement d'infrastructure réseau
EP4374640A1 (fr) Procédés, dispositifs de communication et équipement d'infrastructure
US12088528B2 (en) Communications devices, infrastructure equipment and methods
US20250330959A1 (en) Methods, communications devices, and network infrastructure equipment
RU2775413C2 (ru) Система и способ обеспечения надежной связи с низкой задержкой
WO2026017512A1 (fr) Procédés, dispositifs de communication et équipement d'infrastructure
WO2025021892A1 (fr) Procédés, dispositifs de communication et équipement d'infrastructure
EP4662958A1 (fr) Transmission en liaison montante avec fonctionnement en mode à octroi configuré
EP4595340A1 (fr) Procédés, dispositifs de communication, et équipement d'infrastructure réseau

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20250807

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR