[go: up one dir, main page]

WO2024092658A1 - Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande - Google Patents

Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande Download PDF

Info

Publication number
WO2024092658A1
WO2024092658A1 PCT/CN2022/129666 CN2022129666W WO2024092658A1 WO 2024092658 A1 WO2024092658 A1 WO 2024092658A1 CN 2022129666 W CN2022129666 W CN 2022129666W WO 2024092658 A1 WO2024092658 A1 WO 2024092658A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency domain
bandwidth part
domain resources
terminal device
downlink
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.)
Ceased
Application number
PCT/CN2022/129666
Other languages
English (en)
Inventor
Shaofei WANG
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.)
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Original Assignee
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
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 Nokia Shanghai Bell Co Ltd, Nokia Solutions and Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co Ltd
Priority to CN202280101186.2A priority Critical patent/CN120077726A/zh
Priority to PCT/CN2022/129666 priority patent/WO2024092658A1/fr
Publication of WO2024092658A1 publication Critical patent/WO2024092658A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

Definitions

  • Example embodiments described herein generally relate to communication technologies, and more particularly, to devices, methods, apparatuses and computer readable media supporting frequency domain resource allocation (FDRA) for subband full duplex (SBFD) .
  • FDRA frequency domain resource allocation
  • SBFD subband full duplex
  • Subband full duplex is the proposed base station full duplex technique where a time division duplex (TDD) carrier is split into at least one downlink (DL) subband and one uplink (UL) subband at a certain time instance (e.g., a slot) , which means that the base station is capable of transmitting in the DL subband (s) and receiving in the UL subbands (s) simultaneously in the SBFD mode, while user equipments (UEs) served by the base station are still operating in the half-duplex mode.
  • the DL and UL subbands shall be non-overlapping in the frequency domain.
  • SBFD is beneficial for UL coverage enhancement, end-to-end latency reduction as well as system capacity improvement.
  • example embodiments of the present disclosure provide a solution of frequency domain resource allocation for subband full duplex.
  • an example embodiment of a terminal device may comprise at least one processor and at least one memory storing instructions.
  • the instructions may, when executed by the at least one processor, cause the terminal device at least to receive, from a network device, and as part of a downlink assignment or an uplink grant for scheduling a downlink or uplink transmission respectively, frequency domain resource allocation information indicative of frequency domain resources in a virtual bandwidth part, and to map the indicated frequency domain resources in the virtual bandwidth part to frequency domain resources in an active bandwidth part configured and activated for the terminal device.
  • the network device may comprise at least one processor and at least one memory storing instructions.
  • the instructions may, when executed by the at least one processor, cause the network device at least to allocate frequency domain resources in a virtual bandwidth part to a terminal device for a downlink or uplink transmission, to map the allocated frequency domain resources in the virtual bandwidth part to frequency domain resources in an active bandwidth part configured and activated for the terminal device for the downlink or uplink transmission, and to transmit, to the terminal device, and as part of a downlink assignment or an uplink grant for scheduling the downlink or uplink transmission respectively, frequency domain resource allocation information indicative of the frequency domain resources in the virtual bandwidth part.
  • Example embodiments of methods, apparatuses and computer readable media supporting frequency domain resource allocation for subband full duplex are also provided. Such example embodiments generally correspond to the above example embodiments of the terminal and network devices and a repetitive description thereof is omitted here for convenience.
  • Fig. 1 is a schematic diagram illustrating an example communication network in which example embodiments of the present disclosure can be implemented.
  • Fig. 2 is a schematic diagram illustrating an example slot format for subband full duplex operation.
  • Fig. 3 is a schematic diagram illustrating example bandwidth parts within subbands during subband full duplex operation.
  • Fig. 4A is a schematic diagram illustrating an example bandwidth part extending beyond downlink subbands during subband full duplex operation.
  • Fig. 4B is a schematic diagram illustrating an example bandwidth part extending beyond an uplink subband during subband full duplex operation.
  • Fig. 5 is a schematic diagram illustrating example schemes for splitting a carrier into downlink and uplink subbands.
  • Fig. 6 is a schematic diagram illustrating an example virtual bandwidth part for frequency domain resource allocation according to an example embodiment of the present disclosure.
  • Fig. 7 is a schematic diagram illustrating an example virtual bandwidth part for frequency domain resource allocation according to an example embodiment of the present disclosure.
  • Fig. 8 is a schematic message sequence chart illustrating a process according to an example embodiment of the present disclosure.
  • Fig. 9 is a schematic block diagram illustrating an apparatus according to an example embodiment of the present disclosure.
  • Fig. 10 is a schematic block diagram illustrating an apparatus according to an example embodiment of the present disclosure.
  • Fig. 11 is a schematic block diagram illustrating devices in a communication system with which example embodiments of the present disclosure can be implemented.
  • the term “network device” may refer to any suitable entities or devices that can provide network coverage, for instance through network cells with respective indoor and/or outdoor coverages, through which a terminal device can access the network and receive services therefrom.
  • the network device may refer to a base station, an access point (AP) or a transmission reception point (TRP) , for example, a node B (NodeB or NB) , an evolved node B (eNodeB or eNB) , a next generation Node B (gNB) , a beyond 5G base station, a remote radio unit (RRU) , a remote radio head (RRH) , a relay, a low power node such as a pico base station, a femto base station, and so forth, depending on the applied terminology and technology.
  • NodeB or NB node B
  • eNodeB or eNB evolved node B
  • gNB next generation Node B
  • RRU remote radio unit
  • RRH remote radio head
  • the base station may consist of several distributed network units, such as a central unit (CU) , one or more distributed units (DUs) , one or more remote radio heads (RRHs) or remote radio units (RRUs) .
  • CU central unit
  • DU distributed units
  • RRH remote radio heads
  • RRU remote radio units
  • terminal device or “user equipment” (UE) may refer to any entities or devices that can wirelessly communicate with the network devices or with each other.
  • the terminal device can include a mobile phone, a mobile terminal (MT) , a mobile station (MS) , a subscriber station (SS) , a portable subscriber station (PSS) , an access terminal (AT) , a computer, a wearable device, an on-vehicle communication device, a machine type communication (MTC) device, a device to device (D2D) communication device, a vehicle to everything (V2X) communication device, a sensor and the like.
  • MTC machine type communication
  • D2D device to device
  • V2X vehicle to everything
  • Fig. 1 illustrates an example communication network 100 in which example embodiments of the present disclosure can be implemented.
  • the communication network 100 may include a plurality of user equipment (UEs) 110 and a base station 120 serving the plurality of UEs 110.
  • UEs user equipment
  • base station 120 serving the plurality of UEs 110.
  • the UE 110 may establish a radio resource control (RRC) connection with the gNB 120 to receive downlink (DL) transmissions from the gNB 120 and/or transmit uplink (UL) transmissions to the gNB 120.
  • RRC radio resource control
  • the UE 110 and the gNB 120 may operate in a time division duplex (TDD) mode.
  • TDD is a communication scheme wherein the UL transmissions and the DL transmissions are separated from each other in the time domain, thereby allowing both types of transmissions to share the same frequency band (i.e., carrier) .
  • the TDD mode can save valuable frequency resources, and it is also advantageous in case there is an asymmetry of UL and DL data rates.
  • limited allocation of time slots to DL or UL may reduce coverage and increase end-to-end latency.
  • Fig. 2 illustrates an example implementation of slot format for the SBFD operation.
  • the gNB 120 is operating in a full-DL mode where the full TDD carrier is used for DL transmissions, and then the gNB enters into an SBFD mode where the gNB 120 can transmit DL transmissions in two DL subbands and receive UL transmissions in one UL subband. It is worth noting that during the SBFD mode the UE 110 is still operating in half-duplex.
  • the UE 110 receives DL transmissions in one or both of the two DL subbands or transmit UL transmissions in the UL subband, depending on the slot format applied to the UE 110.
  • the gNB 120 switches to a full-UL mode where the whole TDD carrier will be used for UL transmissions.
  • a potential guard period (GP) may be inserted in the time domain in-between UL and DL slots for transmit-receive circuitry switching and interference mitigation.
  • a potential guard band (GB) may be inserted in the frequency domain in-between the UL and DL subbands to mitigate the self-interference due to simultaneous transmission and reception of gNB. It would be appreciated that the slot format shown in Fig. 2 is given as an example, and example embodiments of the present disclosure are also applicable to other slot formats.
  • the gNB 120 allocates frequency domain resources to DL and UL data channels conveying the DL and UL transmissions and informs the UE 110 of the frequency domain resource allocation (FDRA) so that the UE 110 can receive the DL transmissions or transmit the UL transmissions on the right frequency domain resources, e.g. physical resource blocks (PRBs) .
  • the DL data channel may include for example a physical downlink shared channel (PDSCH)
  • the UL data channel may include for example a physical uplink shared channel (PUSCH) .
  • the FDRA information may be signaled to the UE 110 by downlink control information (DCI) which is conveyed by a physical downlink control channel (PDCCH) .
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • the UE 110 may be configured with a certain number (e.g., maximum 4) of bandwidth parts (BWPs) in the UL direction and a certain number (e.g., maximum 4) of BWPs in the DL direction, while at a given point of time only one UL BWP and one DL BWP are active for UL and DL transmissions respectively.
  • the FDRA is performed within the active BWP, which includes a set of contiguous resource blocks (RBs) in the frequency domain.
  • RBs resource blocks
  • a UE may be configured with a BWP covering the full carrier bandwidth, in order to fully utilize the frequency resources.
  • the full carrier will be split into a set of subbands with same/opposite directions (either DL or UL) , and the subband is in granularity of RB.
  • the frequency resources inside the subband (s) with an opposite direction shall not be scheduled for the UE. For example, as shown in Fig. 2, when a UE is receiving DL signals during the SBFD period, the FDRA shall not contain any RB inside the UL subband, and vice versa.
  • One approach is to configure the BWPs fully inside DL/UL subbands, of which an example is shown in Fig. 3.
  • two DL BWPs i.e., DL BWP 0, DL BWP 2
  • one UL BWP i.e., UL BWP 1
  • All the DL and UL BWPs may include a set of contiguous RBs in the frequency domain.
  • the existing FDRA types such as Type 0, Type 1 and Type 2 may be performed in a legacy way because the BWP structure is the same as a traditional BWP.
  • One shortcoming of this approach is that the active BWP for a certain UE cannot be changed due to the fact that BWP switching is not possibly completed within the GP duration when the gNB transitions either form the full-DL mode to the SBFD mode or from the SBFD mode to the full-UL mode. It means that all UEs are not able to utilize the full frequency resources even if the gNB is operating in the full-DL or full-UL mode.
  • Figs. 4A and 4B illustrate example BWPs configured beyond DL/UL subbands during SBFD operation.
  • the UE operates in the DL reception mode during the SBFD period, and the DL BWP (i.e., DL BWP 0) configured for the UE covers the full carrier.
  • the UL subband and two guard bands (GBs) at both sides of the UL subband should not be used for DL communication though they are still inside the active DL BWP (i.e., DL BWP 0) .
  • the UL subband and the two GBs together may be referred to as an excluded or forbidden subband.
  • the UL subband and the two GBs together may be referred to as an excluded or forbidden subband.
  • the UE operates in the UL transmission mode during the SBFD period, and the UL BWP (i.e., UL BWP 0) configured for the UE covers the full carrier.
  • the UL BWP i.e., UL BWP 0
  • two DL subbands at both sides of the UL subband and two GBs between the respective DL subbands and the UL subband should not be used for UL communication though they are still inside the active UL BWP (i.e., UL BWP 0) .
  • the DL subband and the GB below the UL subband may be referred to as a first excluded or forbidden subband (i.e., excluded subband 1)
  • the DL subband and the GB above the UL subband may be referred to as a second excluded or forbidden subband (i.e., excluded subband 2) .
  • the gNB When the gNB allocates frequency domain resources for UL/DL transmissions from/to a UE, the gNB shall guarantee that the frequency domain resource allocation (FDRA) does not include a resource block (RB) belonging to the excluded subband (s) during the SBFD period. It is feasible for some of the FDRA types. For example, when PDSCH or PUSCH is scheduled with FDRA Type 0, resource block groups (RBGs) overlapping the excluded subbands may not be scheduled. However, it is not the case for some other FDRA types.
  • FDRA frequency domain resource allocation
  • Example embodiments of the present disclosure provide an improved solution for FDRA during a SBFD period, which can naturally support existing FDRA types even when an active BWP of a UE, either in the UL direction or the DL direction, spans both UL and DL subbands while only the DL subband (s) or the UL subband (s) is available for the UE during a SBFD period.
  • unavailable frequency domain resources may be removed from the active BWP to form a virtual BWP. Similar to the active BWP, the virtual BWP may be defined with consecutive/contiguous (virtual) resource block indexing, and FDRA may be implemented based on the virtual BWP indexing.
  • the gNB may indicate the allocated resources in the virtual BWP to the UE for example via downlink control information (DCI) carried on PDCCH, where the allocated resources in the virtual BWP are mapped to the original active BWP for real physical layer processing.
  • DCI downlink control information
  • the UE decodes the DCI which schedules PDSCH or PUSCH in the SBFD mode
  • the bitwidth of the frequency domain resource assignment field contained in the DCI depends on the size of the virtual BWP, instead of the size of the original active BWP. Since the virtual BWP has a reduced size than the size of the original active BWP, signaling overhead for DCI can be substantially reduced.
  • Fig. 5 illustrates examples of splitting a carrier into DL and UL subbands for the SBFD mode.
  • the full TDD carrier may be split into a set of DL and UL subbands non-overlapping in the frequency domain.
  • the DL and UL subbands each contains a set of contiguous RBs.
  • the potential GB may be inserted in-between adjacent DL and UL subbands to mitigate self-interference due to simultaneous transmission and reception at the gNB.
  • Fig. 5 on the left hand is shown a first split scheme where the full TDD carrier is split into two DL subbands located at the bottom and top of the full carrier bandwidth and one UL subband centered on the full carrier bandwidth.
  • the first split scheme is also shown in Figs. 2, 3, 4A and 4B.
  • a second split scheme where the full TDD carrier is split into one DL subband located at the lower half of the full TDD carrier and one UL subband located at the upper half of the full TDD carrier with one GB inserted therebetween.
  • Fig. 6 illustrates an example virtual BWP obtained from an example active BWP according to an example embodiment of the present disclosure.
  • the virtual BWP may be used for FDRA and then the allocated frequency domain resources in the virtual BWP may be mapped to the active BWP for physical layer processing. Since the proposed FDRA based on the virtual BWP and the active BWP is applicable to both DL and UL, in the following description the virtual BWP and the active BWP will not be described as a DL-specific or UL-specific BWP. In other words, the following description of the virtual BWP and the active BWP can be applicable to either DL DFRA or UL FDRA.
  • the active BWP may start from in the frequency domain and include contiguous resource blocks (RBs) . is in unit of RB and is counted with respect to a common reference point e.g., Point A.
  • the active BWP may be defined with the two parameters and In this example, it is assumed that where N and M RBs are available frequency domain resources for FDRA during the SBFD period and X RBs are unavailable frequency domain resources for the FDRA during the SBFD period.
  • N and M RBs are available frequency domain resources for FDRA during the SBFD period
  • X RBs are unavailable frequency domain resources for the FDRA during the SBFD period.
  • the X unavailable RBs may be referred to as an excluded (or forbidden) subband which includes the subband in the reverse direction with respect to the direction of the active BWP, and two GBs inserted at both sides of the reverse-direction subband.
  • the N available RBs may be numbered with an index from to the X unavailable RBs may be numbered with an index from to and the M available RBs may be numbered with an index from to
  • the virtual BWP may be obtained by excluding frequency domain resources belonging to the excluded subband from the active BWP and consecutively (or contiguously) re-numbering (or re-indexing) the remaining available frequency domain resources.
  • the X RBs in the excluded subband are removed from the active BWP, and the remaining M+N RBs in the active BWP are available for the FDRA during the SBFD period.
  • the virtual BWP may include the remaining M+N RBs, which may be counted with respect to the common reference point e.g., Point A in the frequency domain and consecutively (or contiguously) re-numbered (or re-indexed) with an index from to It is apparent that the RBs to in the virtual BWP correspond to the RBs to in the active BWP, and the RBs to in the virtual BWP correspond to the RBs to in the active BWP.
  • the virtual BWP may be defined in the exactly same way as the active BWP, i.e., using the two parameters and In the example shown in Fig. 6, is equal to and has a value M+N. Then the existing FDRA types such as Type 0, Type 1 and Type 2 can be applied in a legacy way to the virtual BWP.
  • Fig. 7 also illustrates an example virtual BWP obtained from an example active BWP according to an example embodiment of the present disclosure. Similar to the active BWP shown in Fig. 6, the active BWP shown in Fig. 7 may start from the RB in the frequency domain and include contiguous RBs. The difference is that the X’ RBs are available frequency domain resources for FDRA during the SBFD period while the N’ and M’ RBs are unavailable frequency domain resources for the FDRA during the SBFD period. As discussed above with respect to Fig. 4B, the N’ unavailable RBs may be referred to as a first excluded (or forbidden) subband, and the M’ unavailable RBs may be referred to as a second excluded (or forbidden) subband.
  • the first excluded subband and the second excluded subband each includes a subband in the reverse direction with respect to the active BWP and one GB inserted between the reverse-direction subband and the subband including the X’ available RBs.
  • the N’ unavailable RBs in the first excluded subband may be numbered with an index from to the X’ available RBs may be numbered with an index from to and the M’ unavailable RBs in the second excluded subband may be numbered with an index from to
  • the virtual BWP may be obtained by excluding frequency domain resources belonging to the first and second excluded subbands from the active BWP and consecutively (or contiguously) re-numbering (or re-indexing) the remaining available frequency domain resources.
  • the first N’ RBs and the last M’ RBs in the active BWP are removed, and the virtual BWP includes the middle X’ RBs available for the FDRA during the SBFD period.
  • the X’ available RBs may be counted with respect to the common reference point e.g., Point A in the frequency domain and consecutively (or contiguously) re-numbered (or re-indexed) with an index from to It is apparent that the RBs to in the virtual BWP correspond to the RBs to in the active BWP.
  • the virtual BWP may be defined in the exactly same way as the active BWP, i.e., using the two parameters and In the example shown in Fig. 7, is equal to and has a value X’. Then the existing FDRA types such as Type 0, Type 1 and Type 2 can be applied in a legacy way to the virtual BWP.
  • Fig. 8 illustrates a process 200 for FDRA during the SBFD period according to an example embodiment of the present disclosure.
  • the process 200 may be performed at a network device e.g., the gNB 120 shown in Fig. 1 and a terminal device e.g., the UE 110 shown in Fig. 1. Since some details of the process 200 may have been described above with reference to Figs. 1-7, the process 200 will be described in a simple manner below.
  • the gNB 120 may transmit excluded subband information to the UE 110.
  • the gNB 120 may transmit the DL and UL subband information for example by RRC signaling such as cell-specific signaling or UE group-specific signaling, or by system information broadcast.
  • the DL and UL subband information may indicate one or more DL subbands and one or more UL subbands for the UE 110 to be used during a SBFD period.
  • the full TDD carrier may be split into at least one DL subband and one UL subband for SBFD operation at the gNB 120, while the UE 110 can only operate in one direction (either DL or UL) during the SBFD period.
  • the UE 110 may then derive the excluded subband (s) from the DL and UL subband information.
  • the excluded subband (s) may include one or more subbands in the reverse direction with respect to the UE operation and one or more GBs.
  • the gNB 120 may indicate the one or more DL and UL subbands to the UE 110.
  • the DL and UL subband information may indicate a starting RB, and a size (in unit of RB) or ending RB for each of the DL and UL subbands.
  • the one or more excluded subbands for DL are obtained by subtracting the one or more available DL subbands from the carrier bandwidth, and the one or more excluded subbands for UL are obtained by subtracting the one or more available UL subbands from the carrier bandwidth.
  • the excluded frequency domain resources for DL are obtained by subtracting the one or more available DL subbands (or DL RBs) from the active DL BWP, and the excluded frequency domain resources for UL are obtained by subtracting the one or more available UL subbands (or UL RBs) from the active UL BWP.
  • the gNB 120 may indicate one or more excluded subbands to the UE 110 for the respective directions of communication (DL and UL) .
  • the excluded subband information may indicate the unavailable subband (s) or RBs for a specific direction of communication for the UE 110 during the SBFD period.
  • the one or more available subbands for DL may be determined by subtracting the one or more excluded subbands for DL from the carrier bandwidth, and the one or more available subbands for UL may be determined by subtracting the one or more excluded subbands for UL from the carrier bandwidth.
  • the available frequency domain resources for DL may be determined by subtracting the one or more excluded subbands (or RBs) for DL from the active DL BWP, and the available frequency domain resources for UL may be determined by subtracting the one or more excluded subbands (or RBs) for UL from the active UL BWP.
  • the gNB 120 may allocate frequency domain resources in a virtual BWP to the UE 110 for a DL or UL transmission to be performed during the SBFD period.
  • the virtual BWP may be determined by excluding frequency domain resources belonging to one or more excluded subbands from the active BWP of the UE 110 and consecutively (or contiguously) re-numbering (or re-indexing) the remaining frequency domain resources within the virtual BWP of the UE 110.
  • the existing FDRA types such as Type 0, Type 1 and Type 2 can be applied in a legacy way in the step 220, and details of the existing FDRA types are omitted here for convenience.
  • the gNB 120 can still allocates frequency domain resources in the active BWP to the UE 110 (which in this case matches the virtual BWP) .
  • the gNB 120 may map the allocated frequency domain resources in the virtual BWP to frequency domain resources in the active BWP corresponding to the virtual BWP for the DL or UL transmission to be performed during the SBFD period. It is worth noting that the DL or UL transmission would be performed on the frequency domain resources in the active BWP, not on the frequency domain resources in the virtual BWP.
  • the gNB 120 Since the gNB 120 has knowledge of the active BWP configured and activated for the UE 110 and the excluded subband (s) during the SBFD period, the gNB 120 is aware of the RB mapping relationship between the virtual BWP and the active BWP and it can map the frequency domain resources in the virtual BWP allocated at 220 to the UE 110 for the DL or UL transmission to be performed during the SBFD period to frequency domain resources in the active BWP configured and activated for the UE 110.
  • the gNB 120 may transmit FDRA information indicative of the allocated frequency domain resources in the virtual BWP to the UE 110.
  • the FDRA information may be transmitted as part of a DL assignment or an UL grant for scheduling the DL or UL transmission to be performed during the SBFD period, which may be carried in downlink control information (DCI) conveyed on PDCCH.
  • DCI downlink control information
  • the gNB 120 may re-use the existing DCI formats for transmitting the FDRA information associated with the active BWP to transmit the FDRA information associated with the virtual BWP at the step 240.
  • the UE 110 may determine that the FDRA information indicates the frequency domain resources in the virtual BWP if the DL or UL transmission scheduled by the DL assignment or the UL grant respectively is to be performed during the SBFD period. On the other hand, if the DL or UL transmission scheduled by the DL assignment or the UL grant respectively is to be performed outside the SBFD period, the UE 110 may determine that the FDRA information indicates the frequency domain resources in the active BWP, instead of the virtual BWP.
  • the FDRA information may include an indicator for example one bit to indicate whether the FDRA information indicates frequency domain resources in the virtual BWP or in the active BWP.
  • the UE 110 can determine from the indicator whether the frequency domain resources indicated in the FDRA information are associated with the virtual BWP or the active BWP.
  • the indicator may be transmitted via RRC signaling to the UE 110.
  • the indicator may be jointly indicated with the DL and UL subband information (or with the excluded subband information) to the UE 110 at the step 210.
  • the FDRA information may be represented for example by a frequency domain resource assignment field in the DCI.
  • the frequency domain resource assignment field may include a bitmap to indicate the frequency domain resources allocated to the UE 110 for a DL or UL transmission, and each bit in the bitmap denotes whether a corresponding resource block group (RBG) is allocated to the UE 110.
  • the size (number of bits) of the bitmap may be determined as follows:
  • the size of BWP in unit of RB is the index of the starting RB in the BWP
  • P is the number of RBs included in one RBG. For instance, assuming the active BWP starts at with a size of 273 RBs, the virtual BWP starts at with a size of 137 RBs, and P is 16, then the resultant bitmap indicating the FDRA in the active BWP has a size of 18, while the bitmap indicating the FDRA in the virtual BWP has a size of 9. Hence, the DCI payload size can be reduced substantially when the FDRA is performed based on the virtual BWP.
  • the frequency domain resource assignment field may include a resource indicator value (RIV) to indicate the frequency domain resources allocated to the UE 110 for the DL or UL transmission.
  • the RIV may indicate a starting RB and a RB size of a set of contiguous RBs in the BWP allocated to the UE 110.
  • a bit string representing the RIV may have a size (number of bits) determined as follows:
  • the DCI payload size can also be reduced when the FDRA is performed based on the virtual BWP.
  • the virtual BWP for DL transmissions and the virtual BWP for UL transmissions may have different BWP sizes, as shown in Figs. 4A and 4B, which would lead to different bitmap or bit string sizes of the frequency domain resource assignment field in the DCI.
  • zero-padding may be performed to keep the DL DCI and the UL DCI with the same payload size if necessary.
  • the UE 110 may map at 250 the indicated frequency domain resources in the virtual BWP to frequency domain resources in the active BWP corresponding to the virtual BWP for physical layer processing. Since the UE 110 has received the DL and UL subband information (or the excluded subband information) from the gNB 120 at the step 210, the UE 110 can obtain the virtual BWP from the active BWP and thus it is aware of the RB mapping relationship between the virtual BWP and the active BWP (for example, as shown in Figs. 6-7) . Then at the step 250, the UE 110 can map each RB or RBG indicated for the DL or UL transmission in the virtual BWP to corresponding RB or RBG in the active BWP.
  • one certain RBG indicated in the virtual BWP may split into two parts that are not contiguous (i.e., separated by an excluded subband) in the active BWP.
  • one certain RB bundle or hop may split into two parts that are not contiguous (i.e., separated by an excluded subband) in the active BWP.
  • a set of RBs associated with one certain interlace index may split into two parts that are not contiguous (i.e., separated by an excluded subband) in the active BWP.
  • the UE 110 may receive the DL transmission or transmit the UL transmission on the mapped frequency domain resources in the active BWP (not shown in Fig. 8) . It would be appreciated that if the FDRA information schedules the DL transmission, the DL transmission may be received in the same slot or in a subsequent slot as the FDRA information. The UE 110 would map the virtual BWP resources indicated by the FDRA information to the active BWP resources first, and then decode the active BWP resources for the DL transmission. If the FDRA information schedules the UL transmission, the UE 110 may transmit the UL transmission in the same slot or in a subsequent slot as the FDRA information.
  • the process 200 can support the legacy FDRA types for the SBFD mode since the FDRA types may be performed based on the virtual BWP.
  • the virtual BWP may include contiguous/consecutive (virtual) frequency domain resources indexing and be defined in the same way as the active BWP, and the legacy FDRA types may be performed based on the virtual BWP.
  • the DCI payload size can be reduced considering the smaller size of the virtual BWP compared to the corresponding active BWP.
  • the gNB can re-use existing signaling to inform the UE of the FDRA information associated with the virtual BWP, and it would not cause additional signaling overhead. Since the UE and gNB have knowledge of subbands for the SBFD mode, the UE and the gNB can map the FDRA in the virtual BWP to the active BWP for further physical layer processing.
  • Fig. 9 is a schematic block diagram illustrating an apparatus 300 according to an example embodiment of the present disclosure.
  • the apparatus 300 may be implemented to comprise or to form at least a part of a terminal device like the UE 110 discussed above to perform operations relating to the UE 110. Since the operations relating to the UE 110 have been discussed in detail with reference to Figs. 1-8, the blocks of the apparatus 300 will be described in a simple manner here and details thereof may refer to the above description.
  • the apparatus 300 may comprise a first means 310 for receiving FDRA information from a network device e.g., the gNB 120 shown in Fig. 1.
  • the FDRA information may be received as part of a downlink assignment or an uplink grant for scheduling a downlink or uplink transmission respectively, and it may indicate frequency domain resources in a virtual bandwidth part.
  • the apparatus 300 may further comprise a second means 320 for mapping the indicated frequency domain resources in the virtual bandwidth part to frequency domain resources in an active bandwidth part configured and activated for the UE 110.
  • the apparatus 300 may optionally comprise a third means 330 for determining the virtual bandwidth part from the active bandwidth part.
  • the third means 330 may comprise a first sub-means 332 for excluding frequency domain resources belonging to one or more excluded subbands from the active bandwidth part, and a second sub-means 334 for consecutively re-numbering remaining frequency domain resources within the virtual bandwidth part.
  • the virtual bandwidth part and the active bandwidth part may share a common reference point in the frequency domain, e.g., Point A.
  • the FDRA information may comprise a first bitmap indicative of the frequency domain resources in the virtual bandwidth part, and the first bitmap has a smaller size than a second bitmap indicative of frequency domain resources in the active bandwidth part.
  • the FDRA information may comprise a first resource indicator value indicative of the frequency domain resources in the virtual bandwidth part, and the first resource indicator value is encoded in a first bit string with a smaller size than a second bit string encoding a second resource indicator value indicative of frequency domain resources in the active bandwidth part.
  • the apparatus 300 may optionally comprise a fourth means 340 for receiving from the network device information indicative of the one or more excluded subbands for the UE 110.
  • the one or more excluded subbands may comprise frequency domain resources for downlink transmissions. If the active bandwidth part is a downlink bandwidth part, then the one or more excluded subbands may comprise frequency domain resources for uplink transmissions.
  • the one or more excluded subbands may further comprise one or more guard bands.
  • the apparatus 300 may optionally comprise a fifth means 350 for determining whether the received frequency domain resource allocation information indicates frequency domain resources in the virtual bandwidth part or frequency domain resources in the active bandwidth part. If the downlink or uplink transmission scheduled by the downlink assignment or the uplink grant containing the frequency domain resource allocation information is performed during subband full duplex (SBFD) operation of the network device, the fifth means 350 may determine that the received frequency domain resource allocation information indicates the frequency domain resources in the virtual bandwidth part. If the downlink or uplink transmission scheduled by the downlink assignment or the uplink grant containing the frequency domain resource allocation information is performed during a non-SBFD period, the fifth means 350 may determine that the received frequency domain resource allocation information indicates the frequency domain resources in the active bandwidth part.
  • SBFD subband full duplex
  • Fig. 10 is a schematic block diagram illustrating an apparatus 400 according to an example embodiment of the present disclosure.
  • the apparatus 400 may be implemented to comprise or to form at least a part of a network device like the gNB 120 discussed above to perform operations relating to the gNB 120. Since the operations relating to the gNB 120 have been discussed in detail with reference to Figs. 1-8, the blocks of the apparatus 400 will be described in a simple manner here and details thereof may refer to the above description.
  • the apparatus 400 may comprise a first means 410 for allocating frequency domain resources in a virtual bandwidth part to a terminal device for a downlink or uplink transmission, a second means 420 for mapping the allocated frequency domain resources in the virtual bandwidth part to frequency domain resources in an active bandwidth part configured and activated for the terminal device for the downlink or uplink transmission, and a third means 430 for transmitting to the terminal device, as part of a downlink assignment or an uplink grant for scheduling the downlink or uplink transmission respectively, frequency domain resource allocation information indicative of the frequency domain resources in the virtual bandwidth part.
  • the frequency domain resources in the virtual bandwidth part may be allocated to the terminal device for the downlink or uplink transmission in a case where the downlink or uplink transmission is performed during a subband full duplex period.
  • the apparatus 400 may optionally comprise a fourth means 440 for determining the virtual bandwidth part from an active bandwidth part configured and activated for the terminal device.
  • the fourth means 440 may comprise a first sub-means 442 for excluding frequency domain resources belonging to one or more excluded subbands from the active bandwidth part, and a second sub-means 444 for consecutively re-numbering remaining frequency domain resources within the virtual bandwidth part.
  • the virtual bandwidth part and the active bandwidth part may share a common reference point in the frequency domain e.g., Point A.
  • the frequency domain resource allocation information may comprise a first bitmap indicative of the frequency domain resources in the virtual bandwidth part, and the first bitmap may have a smaller size than a second bitmap indicative of frequency domain resources in the active bandwidth part.
  • the frequency domain resource allocation information may comprise a first resource indicator value indicative of the frequency domain resources in the virtual bandwidth part, and the first resource indicator value may be encoded in a first bit string with a smaller size than a second bit string encoding a second resource indicator value indicative of frequency domain resources in the active bandwidth part.
  • the apparatus 400 may further comprise a fifth means 450 for transmitting to the terminal device information indicative of the one or more excluded subbands for the terminal device, for instance by transmitting DL and UL subband information, from which the excluded subbands can be implicitly derived, or by explicitly transmitting the excluded subband information for the respective directions of communication.
  • the one or more excluded subbands may comprise frequency domain resources for downlink transmissions. If the active bandwidth part is a downlink bandwidth part, then the one or more excluded subbands may comprise frequency domain resources for uplink transmissions.
  • the one or more excluded subbands may further comprise one or more guard bands.
  • Fig. 11 is a schematic block diagram illustrating devices in a communication system 500 with which example embodiments of the present disclosure can be implemented.
  • the communication system 500 may include a terminal device 510 which may be implemented as the UE 110 shown in Fig. 1, and a network device 520 which may be implemented as the base station (e.g., gNB) 120 shown in Fig. 1.
  • a terminal device 510 which may be implemented as the UE 110 shown in Fig. 1
  • a network device 520 which may be implemented as the base station (e.g., gNB) 120 shown in Fig. 1.
  • the terminal device 510 may comprise one or more processors 511, one or more memories 512 and one or more transceivers 513 interconnected through one or more buses 514.
  • the one or more buses 514 may be address, data, or control buses, and may include any interconnection mechanism such as series of lines on a motherboard or integrated circuit, copper cables, optical fibers, or other electrical/optical communication equipment, and the like.
  • Each of the one or more transceivers 513 may comprise a receiver and a transmitter, which are connected to one or more antennas 516.
  • the terminal device 510 may wirelessly communicate with the network device 520 through the one or more antennas 516.
  • the one or more memories 512 may include computer program code or instructions 515.
  • the one or more memories 512 and the computer program code or instructions 515 may be configured to, when executed by the one or more processors 511, cause the terminal device 510 to perform processes and steps relating to the UE 110 as described above.
  • the network device 520 may comprise one or more processors 521, one or more memories 522, one or more transceivers 523 and one or more network interfaces 527 interconnected through one or more buses 524.
  • the one or more buses 524 may be address, data, or control buses, and may include any interconnection mechanism such as a series of lines on a motherboard or integrated circuit, copper cables, optical fibers, or other electrical/optical communication equipment, and the like.
  • Each of the one or more transceivers 523 may comprise a receiver and a transmitter, which are connected to one or more antennas 526.
  • the network device 520 may operate as a base station for the terminal device 510 and wirelessly communicate with the terminal device 510 through the one or more antennas 526.
  • the one or more network interfaces 527 may provide wired or wireless communication links through which the network device 520 may communicate with other network devices, entities or functions.
  • the one or more memories 522 may include computer program code or instructions 525.
  • the one or more memories 522 and the computer program code or instructions 525 may be configured to, when executed by the one or more processors 521, cause the network device 520 to perform processes and steps relating to the base station 120 as described above.
  • the one or more processors 511, 521 discussed above may be of any appropriate type that is suitable for the local technical network, and may include one or more of general purpose processors, special purpose processor, microprocessors, a digital signal processor (DSP) , one or more processors in a processor based multi-core processor architecture, as well as dedicated processors such as those developed based on Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) .
  • the one or more processors 511, 521 may be configured to control other elements of the terminal/network device and operate in cooperation with them to implement the procedures discussed above.
  • the one or more memories 512, 522 may include at least one storage medium in various forms, such as a volatile memory and/or a non-volatile memory.
  • the volatile memory may include but not limited to for example a random access memory (RAM) or a cache.
  • the non-volatile memory may include but not limited to for example a read only memory (ROM) , a hard disk, a flash memory, and the like.
  • the one or more memories 512, 522 may include but not limited to an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.
  • the network device 520 can be implemented as a single network node, or disaggregated/distributed over two or more network nodes, such as a central unit (CU) , a distributed unit (DU) , a remote radio head-end (RRH) , using different functional-split architectures and different interfaces.
  • CU central unit
  • DU distributed unit
  • RRH remote radio head-end
  • blocks in the drawings may be implemented in various manners, including software, hardware, firmware, or any combination thereof.
  • one or more blocks may be implemented using software and/or firmware, for example, machine-executable instructions stored in the storage medium.
  • parts or all of the blocks in the drawings may be implemented, at least in part, by one or more hardware logic components.
  • FPGAs Field-Programmable Gate Arrays
  • ASICs Application-Specific Integrated Circuits
  • ASSPs Application-Specific Standard Products
  • SOCs System-on-Chip systems
  • CPLDs Complex Programmable Logic Devices
  • Some example embodiments further provide computer program code or instructions which, when executed by one or more processors, may cause a device or apparatus to perform the procedures described above.
  • the computer program code or instructions for carrying out procedures of the example embodiments may be written in any combination of one or more programming languages.
  • the computer program code or instructions may be provided to one or more processors or controllers of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code or instructions, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code or instructions may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • Some example embodiments further provide a computer program product or a computer readable medium having the computer program code or instructions stored therein.
  • the computer readable medium may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

Landscapes

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

Abstract

Des modes de réalisation donnés à titre d'exemple concernent de manière générale des dispositifs, des procédés, des appareils et des supports lisibles par ordinateur prenant en charge une attribution de ressources de domaine fréquentiel pour un duplex intégral de sous-bande. Un équipement terminal peut être configuré pour recevoir, en provenance d'un dispositif de réseau, et en tant que partie d'une attribution de liaison descendante ou d'une autorisation de liaison montante pour planifier une transmission de liaison descendante ou de liaison montante respectivement, des informations d'attribution de ressources de domaine fréquentiel indiquant des ressources de domaine fréquentiel dans une partie de bande passante virtuelle, et mapper les ressources de domaine fréquentiel indiquées dans la partie de bande passante virtuelle à des ressources de domaine fréquentiel dans une partie de bande passante active configurée et activée pour l'équipement terminal.
PCT/CN2022/129666 2022-11-03 2022-11-03 Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande Ceased WO2024092658A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280101186.2A CN120077726A (zh) 2022-11-03 2022-11-03 用于子带非重叠全双工的频域资源分配
PCT/CN2022/129666 WO2024092658A1 (fr) 2022-11-03 2022-11-03 Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/129666 WO2024092658A1 (fr) 2022-11-03 2022-11-03 Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande

Publications (1)

Publication Number Publication Date
WO2024092658A1 true WO2024092658A1 (fr) 2024-05-10

Family

ID=90929298

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/129666 Ceased WO2024092658A1 (fr) 2022-11-03 2022-11-03 Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande

Country Status (2)

Country Link
CN (1) CN120077726A (fr)
WO (1) WO2024092658A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025050748A1 (fr) * 2024-06-14 2025-03-13 深圳传音控股股份有限公司 Procédé de traitement, dispositif de communication et support de stockage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019160720A1 (fr) * 2018-02-13 2019-08-22 Idac Holdings, Inc. Procédés de sélection de ressource sans licence
CN110351709A (zh) * 2018-04-04 2019-10-18 华为技术有限公司 通信方法和通信装置
WO2021202551A1 (fr) * 2020-04-03 2021-10-07 Qualcomm Incorporated Fonctionnement sur partie de bande passante pour une planification multi-cellule par message unique d'informations de commande de liaison descendante
CN113543347A (zh) * 2020-04-15 2021-10-22 大唐移动通信设备有限公司 一种调度方法、终端和网络侧设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019160720A1 (fr) * 2018-02-13 2019-08-22 Idac Holdings, Inc. Procédés de sélection de ressource sans licence
CN110351709A (zh) * 2018-04-04 2019-10-18 华为技术有限公司 通信方法和通信装置
WO2021202551A1 (fr) * 2020-04-03 2021-10-07 Qualcomm Incorporated Fonctionnement sur partie de bande passante pour une planification multi-cellule par message unique d'informations de commande de liaison descendante
CN113543347A (zh) * 2020-04-15 2021-10-22 大唐移动通信设备有限公司 一种调度方法、终端和网络侧设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOKIA, NOKIA SHANGHAI BELL: "On remaining details of BWPs", 3GPP TSG-RAN WG1 MEETING #92BIS, R1-1804762, 6 April 2018 (2018-04-06), XP051413565 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025050748A1 (fr) * 2024-06-14 2025-03-13 深圳传音控股股份有限公司 Procédé de traitement, dispositif de communication et support de stockage

Also Published As

Publication number Publication date
CN120077726A (zh) 2025-05-30

Similar Documents

Publication Publication Date Title
US11832089B2 (en) Systems and methods for multicast resource allocation
WO2023044912A1 (fr) Procédé, dispositif et support de stockage informatique pour la communication
CN111133814B (zh) 用于传输控制信息的方法和装置
EP3634055A1 (fr) Procédé de transmission de signal, dispositif associé, et système
US9204454B2 (en) Interference coordination in wireless network cloud environment
CN117222032A (zh) 侧边链路车联网传输方法及其用户设备
WO2023245669A1 (fr) Procédé, dispositif et support de stockage informatique de communication
US11601920B2 (en) Methods and apparatuses for multiple transmission and reception point (multi-TRP) physical uplink control channel (PUCCH) scheme determination
US20180091282A1 (en) Method and apparatus for managing downlink to uplink interference in wireless communication system
US20200153592A1 (en) Resource allocation signaling
US20240422752A1 (en) Methods, devices, and medium for communication
CN115002907A (zh) 一种资源调度的方法及通信装置
US20180191454A1 (en) Radio network node, wireless device and methods performed therein
WO2019105255A1 (fr) Procédé, dispositif, et support de stockage lisible par ordinateur, pour une attribution de ressource sur un spectre sans licence
WO2024092658A1 (fr) Attribution de ressources de domaine fréquentiel pour duplex intégral sans chevauchement de sous-bande
EP2605603A1 (fr) Station de base, station de relais, méthode de transmission et méthode de réception
JP7652333B2 (ja) 通信の方法、装置及びコンピュータ可読媒体
EP3965507B1 (fr) Procédé de planification de terminal, dispositif et support d'informations
WO2019024075A1 (fr) Système et procédé de planification de ressources de communication
KR102484743B1 (ko) 무선 통신 시스템에서 기지국 간 간섭 관리 방법 및 장치
WO2024098192A1 (fr) Procédé, dispositif et support lisible par ordinateur destinés aux communications
WO2025065189A1 (fr) Dispositif, procédé et support lisible par ordinateur pour des communications
WO2024020814A1 (fr) Procédé, dispositif et support lisible par ordinateur destinés aux communications
US12015568B2 (en) Base station, method, program, and recording medium
CN118945848A (zh) 通信方法和通信装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22963968

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280101186.2

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 202547048841

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 202280101186.2

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 202547048841

Country of ref document: IN

122 Ep: pct application non-entry in european phase

Ref document number: 22963968

Country of ref document: EP

Kind code of ref document: A1