APPARATUS AND METHOD FOR TRANSMITTING OR RECEIVING A PHYSICAL SIDELINK BROADCAST CHANNEL - Patent application

Abstract

An apparatus and method for transmitting or receiving a Physical Sidelink Broadcast Channel (PSBCH) are provided. The method for transmitting a PSBCH from a first user equipment includes transmitting, to one or more second user equipments, PSBCH-bearing information, the PSBCH-bearing information being used to determine periodicity and the number of slots, thereby reducing the payload size of the information carried in the PSBCH.

Description

[Technical field]

[0001] 2. Background of the Invention The present disclosure relates to the field of communication systems, and more particularly, to an apparatus and method for transmitting or receiving a Physical Sidelink Broadcast Channel (PSBCH). [Background technology]

[0002] Sidelink (SL) technology, developed under the 3rd Generation Partnership Project (3GPP) for direct device-to-device (D2D) wireless communication from one User Equipment (UE) to another, has traditionally been designed to provide essential communications for Public Safety (PS) services and Vehicle-to-Everything (V2X) communications for Intelligent Transportation Systems (ITS), including road safety use cases. Since these applications and services depend on the safety of PS participants and road users such as drivers, riders, and pedestrians, a key objective is to provide a reliable Sidelink (SL) communication system. To ensure their safety from providing a reliable D2D system, the design of SL communication has focused on broadcast type transmission / communication.

[0003] Furthermore, D2D communication includes mutual discovery of D2D terminals in an in-coverage (IC) scenario and broadcast communication between D2D terminals in an in-coverage (IC), partial-coverage (PC) and out-of-coverage (OC) scenario. A D2D terminal may be, for example, a user equipment (UE).

[0004] For UEs participating in D2D broadcast communication, when an in-cell UE (ICUE) receives information configured by a network node (e.g., base station), it needs to transmit a Physical Sidelink Broadcast Channel (PSBCH) with the information to an out-of-cell UE (OCCUE).

[0005] If all information with a large payload size is carried in the PSBCH, the payload size of such information will be too large for the PSBCH. So far, there is no mature implementation scheme on how to reduce the payload size of information.

[0006] Therefore, there is a need for an apparatus and method for transmitting or receiving a physical sidelink broadcast channel (PSBCH) that can overcome the problems in the prior art and reduce the payload size of the information carried in the PSBCH. Summary of the Invention

[0007] The objective of the present disclosure is to propose an apparatus and method for transmitting or receiving a Physical Sidelink Broadcast Channel (PSBCH) that can solve the problems in the prior art and reduce the payload size of the information carried in the PSBCH.

[0008] In a first aspect of the disclosure, a method for transmitting a physical sidelink broadcast channel (PSBCH) of a first user equipment includes transmitting, to one or more second user equipments, a PSBCH carrying information, the PSBCH being used to determine a periodicity and a number of slots.

[0009] In a second aspect of the disclosure, a first user equipment for transmitting a physical sidelink broadcast channel (PSBCH) includes a memory, a transceiver, and a processor coupled to the memory and to the transceiver, the processor configured to control the transceiver to transmit the PSBCH with information to one or more second user equipments, the information in the PSBCH being used to determine a periodicity and a number of slots.

[0010] In a third aspect of the present disclosure, a method for receiving a physical sidelink broadcast channel (PSBCH) of a second user equipment includes receiving a PSBCH carrying information from one or more first user equipments, the information carried in the PSBCH being used to determine a periodicity and a number of slots.

[0011] In a fourth aspect of the disclosure, a second user equipment for receiving a physical sidelink broadcast channel (PSBCH) includes a memory, a transceiver, and a processor coupled to the memory and to the transceiver, the processor configured to control the transceiver to receive the PSBCH carrying information from one or more first user equipments, the information carried in the PSBCH being used to determine a periodicity and a number of slots.

[0012] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium has instructions stored therein that, when executed by a computer, cause the computer to perform the method set forth above.

[0013] In a sixth aspect of the present disclosure, the chip includes a processor configured to call and execute a computer program stored in a memory to cause a device in which the chip is installed to perform the above method.

[0014] In a seventh aspect of the present disclosure, a computer readable storage medium having a computer program stored therein causes a computer to perform the above method.

[0015] In an eighth aspect of the present disclosure, a computer program product includes a computer program, the computer program causing a computer to perform the method set forth above.

[0016] In a ninth aspect of the present disclosure, a computer program causes a computer to carry out the above method.

[0017] In order to more clearly illustrate the embodiments of the present disclosure or related art, the following drawings are described in the embodiments and briefly introduced. It is clear that the drawings are merely some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without paying preconditions. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a block diagram illustrating a first user equipment (UE), a second UE, and a network node (e.g., a base station, BS) (e.g., a gNB) for communication in a communication network system according to one embodiment of the present disclosure.

[0019] [Diagram 2] FIG. 2 is a flowchart illustrating a method for transmitting a physical sidelink broadcast channel (PSBCH) for a first user equipment according to one embodiment of the present disclosure.

[0020] [Diagram 3] FIG. 3 is a flowchart illustrating a method for receiving a physical sidelink broadcast channel (PSBCH) for a second user equipment according to one embodiment of the present disclosure.

[0021] [Figure 4] FIG. 4 is a block diagram illustrating a system for wireless communication according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, the technical matters, structural features, objectives to be achieved, and effects of the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Specifically, the terms in the embodiments of the present disclosure are merely for describing the objectives of specific embodiments, and are not intended to limit the present disclosure.

[0023] In some embodiments, the information (e.g., time division duplex configuration, TDD configuration, etc.) is indicated by using a Physical Sidelink Broadcast Channel (PSBCH) (e.g., new radio vehicle-to-mono PSBCH, NR-V2X PSBCH, etc.). In case of partial coverage scenario, the user equipment (ICUE) located in the coverage area of ​​the cell can transmit PSBCH with information configured by the network node (e.g., base station) configuration to the out-of-coverage UE (OCCUE). The information configured by the network node (e.g., TDD configuration) is provided by Radio Resource Control (RRC) signaling or System Information Block (SIB).

[0024] The current detailed signaling is as follows: JPEG0007661301000001.jpg191169

[0025] ReferenceSubcarrierSpacing:

[0026] The reference subcarrier spacing (SCS) is used to determine the time domain boundaries in the uplink-downlink (UL-DL) pattern and must be common across all subcarrier specific carriers, i.e., independent of the actual subcarrier spacing used for data transmission. Only 15kHz, 30kHz, or 60kHz (<6GHz) and 60kHz or 120kHz (>6GHz) are applicable. The network node (e.g. base station) configures the SCS no larger than any of the configured bandwidth portions (BWPs) for the serving cell. Corresponds to the L1 parameter "reference-SCS" (see 3GPP TS 38.213, section 11.1).

[0027] dl-UL-TransmissionPeriodicity:

[0028] The periodicity of the DL-UL pattern may refer to 3GPP TS 38.213, Section 11.1. If dl-UL-TransmissionPeriodicity-v1530 is signaled, the UE shall ignore dl-UL-TransmissionPeriodicity (without suffix).

[0029] nrofDownlinkSlots:

[0030] For the number of consecutive full DL slots that may be located at the beginning of each DL-UL pattern, see 3GPP TS 38.213, section 11.1. In this release, the maximum value for this field is 80.

[0031] nrofDownlinkSymbols:

[0032] The number of consecutive DL symbols at the beginning of a slot following the last full DL slot (derived from nrofDownlinkSlots). A value of 0 indicates that there are no partial downlink slots. (See 3GPP TS 38.213, section 11.1.)

[0033] nrofUplinkSlots:

[0034] For the number of consecutive full UL slots that may be at the end of each DL-UL pattern, see 3GPP TS 38.213, section 11.1. In this release, the maximum value for this field is 80.

[0035] nrofUplinkSymbols:

[0036] The number of consecutive UL symbols at the end of the slot preceding the first full UL slot (derived from nrofUplinkSlots). A value of 0 indicates that there are no partial uplink slots. (See 3GPP TS 38.213, section 11.1.)

[0037] If all of the above current information were to be carried in the PSBCH, the payload size of the PSBCH would be too large. Therefore, some embodiments of the present disclosure provide an apparatus and method for transmitting or receiving a physical sidelink broadcast channel (PSBCH), which can solve the problems in the prior art and reduce the payload size of the information carried in the PSBCH.

[0038] FIG. 1 illustrates, in some embodiments, a first user equipment (UE) 10, a second UE 20, and a network node 30 (e.g., base station, BS) (e.g., gNB) for communication within a communication network system 40 according to an embodiment of the present disclosure. The communication network system 40 includes one or more first UEs 10 of a cell, one or more second UEs 20 outside the cell, and the network node 30. The first UE 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and to the transceiver 13. The second UE 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and to the transceiver 23. The network node 30 may include a memory 32, a transceiver 33, and a processor 31 coupled to the memory 32 and to the transceiver 33. The processor 11 or 21 or 31 may be configured to implement the proposed functions, procedures, and / or methods described herein. The layers of the radio interface protocol may be implemented in the processor 11, 21 or 31. 32 is operatively coupled to the processor 11 or 21 or 31 and stores various information for operating the processor 11 or 21 or 31. The transceiver 13 or 23 or 33 is operatively coupled to the processor 11 or 21 or 33 and transmits and / or receives wireless signals.

[0039] The processor 11 or 21 or 31 may include an application specific integrated circuit (ASIC), other chipset, logic circuit, and / or data processing device. The memory 12 or 22 or 32 may include a read only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium, and / or other storage device. The transceiver 13 or 23 or 33 may include a baseband circuit for processing radio frequency signals. When an embodiment is implemented in software, the techniques described herein may be implemented by modules (e.g., procedures, functions, and the like) that perform functions described herein. The modules may be stored in the memory 12 or 22 or 32 and executed by the processor 11 or 21 or 31. The memory 12 or 22 or 32 may be implemented within the processor 11 or 21 or 31 or may be implemented external to the processor 11 or 21 or 31, in which case they may be communicatively coupled to the processor 11 or 21 or 31 via various means known in the art.

[0040] The communications between the UEs relate to vehicle-to-thing (V2X) communications, including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure / network (V2I / N) communications, in accordance with sidelink technologies developed under 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) and New Radio (NR) Release 16 and later. The UEs communicate directly with each other via a sidelink interface, such as a PC5 interface. Some embodiments of the present disclosure relate to sidelink communication technologies in 3GPP NR Release 16 and later.

[0041] In some embodiments, the processor 11 of the first UE 10 is configured to control the transceiver 13 to transmit to one or more second UEs a PSBCH carrying information used to determine a periodicity and a number of slots. The information includes a slot format indicator (SFI). The information also includes a time division duplex (TDD) configuration. This allows a payload size of the information (such as a TDD configuration) carried in the PSBCH to be reduced.

[0042] In some embodiments, the processor 21 of the second UE 20 is configured to control the transceiver 23 to receive a PSBCH carrying information from one or more first users UE 10, the information carried in the PSBCH being used to determine the periodicity and the number of slots, and the information also includes a Time Division Duplex (TDD) configuration, thereby allowing to reduce the payload size of the information carried in the PSBCH (such as the TDD configuration).

[0043] FIG. 2 illustrates a method 200 for transmitting a physical sidelink broadcast channel (PSBCH) of a first user equipment according to an embodiment of the present disclosure. The method 200 includes a block 202 of transmitting a PSBCH with information to one or more second user equipments, the information included in the PSBCH being used to determine a periodicity and a number of slots. In some embodiments, the information includes a slot format indicator (SFI). In some embodiments, the information includes a time division duplex (TDD) configuration. Either the SFI or the TDD configuration is used to determine UL or SL resources. This can reduce the payload size of the information included in the PSBCH (such as the TDD configuration). In some embodiments, the method 200 further includes a block 204 of obtaining a first reference subcarrier spacing (SCS), the first reference SCS being configured by the network.

[0044] FIG. 3 illustrates a method 300 for receiving a physical sidelink broadcast channel (PSBCH) of a second user equipment according to an embodiment of the present disclosure. The method 300 includes a block 302 of receiving a PSBCH with information from one or more first user equipments, the information included in the PSBCH being used to determine a periodicity and a number of slots. In some embodiments, the information includes a slot format indicator (SFI). In some embodiments, the information includes a time division duplex (TDD) configuration. Either the SFI or the TDD configuration is used to determine UL or SL resources. This can reduce the payload size of the information included in the PSBCH (such as the TDD configuration). In some embodiments, the method 300 further includes a block 304 of obtaining a first reference subcarrier spacing (SCS), the first reference SCS being configured by the network.

[0045] In some embodiments, the slot comprises an uplink (UL) slot, hi some embodiments, the slot comprises a sidelink (SL) slot.

[0046] In some embodiments, the information carried in the PSBCH is used to determine the number of UL slots. In some embodiments, the information carried in the PSBCH is used to determine the number of SL slots.

[0047] In some embodiments, only Pattern 1 is configured by the network and the information carried in the PSBCH is determined by parameters configured in Pattern 1. In some embodiments, the periodicity determined by the information carried in the PSBCH is determined by the periodicity configured in Pattern 1. In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of slots configured in Pattern 1. In some embodiments, the slots configured in Pattern 1 include UL slots. In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of UL slots configured in Pattern 1.

[0048] In some embodiments, both Pattern 1 and Pattern 2 are configured by the network, and the information carried in the PSBCH is determined by parameters configured in Pattern 1 and / or Pattern 2. In some embodiments, the periodicity determined by the information carried in the PSBCH is determined by a first periodicity configured in Pattern 1 and a second periodicity configured in Pattern 2. In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of slots configured in at least one of Pattern 1 and Pattern 2. In some embodiments, the slots configured in at least one of Pattern 1 and Pattern 2 include UL slots. In some embodiments, Pattern 1 and Pattern 2 are adjacent to each other. In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of UL slots configured in at least one of Pattern 1 and Pattern 2. In some embodiments, Pattern 2 includes only UL slots, and the number of slots determined by the information carried in the PSBCH is determined by the number of UL slots configured in both Pattern 1 and Pattern 2.

[0049] Some embodiments further include obtaining a first reference subcarrier spacing (SCS), the first reference SCS being configured by the network. In some embodiments, the number of slots determined by the information carried in the PSBCH is further determined by the first reference SCS and a second reference SCS, the second reference SCS being pre-configured or pre-defined or determined by the information carried in the PSBCH. In some embodiments, the information carried in the PSBCH is further used to determine the second reference SCS.

[0050] In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of UL slots configured in Pattern 1 and a scaling factor between the first and second reference SCSs. In some embodiments, the number of slots determined by the information carried in the PSBCH is determined by the number of UL slots configured in Pattern 1 and / or Pattern 2 and a scaling factor between the first and second reference SCSs.

[0051] In some embodiments, if the first reference SCS is N times the second reference SCS, then the number of slots determined by the information carried in the PSBCH is N times the number of slots configured in Pattern 1 and / or Pattern 2. In some embodiments, if the second reference SCS is N times the first reference SCS, then the number of slots configured in Pattern 1 and / or Pattern 2 is N times the number of slots determined by the information carried in the PSBCH.

[0052] In some embodiments, the information carried in the PSBCH further determines the number of symbols, in some embodiments, the symbols include UL symbols, in some embodiments, the symbols include SL symbols.

[0053] In some embodiments, the first user equipment is located within coverage of the cell and the second user equipment is located outside coverage of the cell.

[0054] In some embodiments, if a network node (eg, a base station) configures both Pattern 1 and Pattern 2, the following information is determined by the information carried in the PSBCH:

[0055] 1. Periodicity.

[0056] 2. Number of UL slots or number of SL slots.

[0057] 3. Reference SCS.

[0058] The periodicity is determined by the periodicity configured in Pattern 1 and the periodicity configured in Pattern 2, the number of UL slots is determined by the number of UL shots configured in Pattern 2, and the reference SCS is a reference subcarrier spacing used to determine the time domain boundary. If SL is deployed on the Uu carrier, only UL resources can be used for SL transmission. For example, in case of a TDD system, only UL slots or UL symbols can be used for SL transmission, and in case of a Frequency Division Duplex (FDD) system, SL transmission can be deployed only on the UL band. Alternatively, the number of SL slots and / or the number of SL symbols can be indicated in the PSBCH. In another embodiment, the number of SL slots and / or the number of SL symbols can be determined by information carried in the PSBCH. The number of SL slots is determined by the number of UL slots configured in Pattern 1 and / or Pattern 2. The number of SL symbols is determined by the number of UL symbols configured in Pattern 1 and / or Pattern 2.

[0059] In one embodiment, the periodicity determined by the information carried in the PSBCH is an aggregation between the periodicities configured in Pattern 1 and Pattern 2.

[0060] For example, a network node configures both Pattern 1 and Pattern 2 in TDD-UL-DL-ConfigCommon. And the parameter referenceSubcarrierSpacing is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 3 ms) and the number of UL slots is set to 1. In Pattern 2, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 7 ms) and the number of UL slots is set to 3.

[0061] For PSBCH, the parameter reference SCS is set to 15 kHz, which is set to the same value as the parameter referenceSubcarrierSpacing configured by the network node. The parameter periodicity in PSBCH is the aggregation between the parameters dl-UL-TransmissionPeriodicity in both Pattern 1 and Pattern 2. The periodicity is therefore 10 ms. The information of the number of UL (or SL) slots in PSBCH is determined by the number of UL slots in Pattern 2. In this case, the number of UL (or SL) slots in PSBCH is 3.

[0062] For example, a network node configures both Pattern 1 and Pattern 2 in TDD-UL-DL-ConfigCommon. And the parameter referenceSubcarrierSpacing is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 3 ms) and the number of UL slots is set to 1. In Pattern 2, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 7 ms) and the number of UL slots is set to 3.

[0063] For PSBCH, the parameter reference SCS can be set to 30 kHz, which is twice the parameter referenceSubcarrierSpacing configured by the network node. The parameter periodicity in PSBCH is the aggregation between the parameters dl-UL-TransmissionPeriodicity in both Pattern 1 and Pattern 2. The periodicity is therefore 10 ms. The information of the number of UL (or SL) slots in PSBCH is determined by the number of UL slots in Pattern 2 and the scale between the reference SCS in PSBCH and referenceSubcarrierSpacing. The number of UL (or SL) slots in PSBCH is 6, which corresponds to 3 UL slots in Pattern 2 considering different reference SCS. The above embodiment can reduce the payload size of the information (such as TDD configuration) carried in PSBCH. Furthermore, in the above embodiment, the slot structure is flexible, and better spectrum utilization is provided.

[0064] In some embodiments, if a network node (eg, a base station) configures both Pattern 1 and Pattern 2, the following information is determined by the information carried in the PSBCH:

[0065] 1. Periodicity.

[0066] 2. Number of UL slots or number of SL slots.

[0067] The periodicity is determined by the periodicity configured in Pattern 1 and the periodicity configured in Pattern 2, and the number of UL slots is determined by the number of UL shots configured in Pattern 2. If SL is deployed on the Uu carrier, only UL resources can be used for SL transmission. For example, in case of a TDD system, only UL slots or UL symbols can be used for SL transmission, and in case of an FDD system, SL transmission can be deployed only on the UL band. Alternatively, the number of SL slots and / or the number of SL symbols can be indicated in the PSBCH. In another embodiment, the number of SL slots and / or the number of SL symbols can be determined by information carried in the PSBCH. The number of SL slots is determined by the number of UL slots configured in Pattern 1 and / or Pattern 2. The number of SL symbols is determined by the number of UL symbols configured in Pattern 1 and / or Pattern 2.

[0068] In one embodiment, the periodicity determined by the information carried in the PSBCH is an aggregation between the periodicities configured in Pattern 1 and Pattern 2.

[0069] For example, a network node configures both Pattern 1 and Pattern 2 in TDD-UL-DL-ConfigCommon, and the parameter referenceSubcarrierSpacing (denoted as 1st Reference SCS) is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 3 ms) and the number of UL slots is set to 1. In Pattern 2, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (alternatively it may be 7 ms) and the number of UL slots is set to 3.

[0070] In one embodiment, the predefined reference SCS (denoted as the second reference SCS) is 15 kHz. The periodicity parameter in PSBCH is the aggregation between the parameters dl-UL-TransmissionPeriodicity in both Pattern 1 and Pattern 2. Therefore, the periodicity is 10 ms. The information of the number of UL (or SL) slots in PSBCH is determined by the number of UL slots in Pattern 2. Since the parameter referenceSubcarrierSpacing is the same as the second reference SCS, the number of UL (or SL) slots in PSBCH is 3.

[0071] In one embodiment, the predefined reference SCS (denoted as the second reference SCS) is 30 kHz. The parameter periodicity in the PSBCH is the aggregation between the parameters dl-UL-TransmissionPeriodicity in both Pattern 1 and Pattern 2. The periodicity is therefore 10 ms. The information of the number of UL (or SL) slots in the PSBCH is determined by the number of UL slots in Pattern 2. Considering that the second reference SCS is twice the parameter referenceSubcarrierSpacing, the number of UL slots in the PSBCH is 6, which is determined by the number of UL slots in Pattern 2 and the scale between the second reference SCS and referenceSubcarrierSpacing. The above embodiment can reduce the payload size of the information (such as TDD configuration) carried in the PSBCH. Furthermore, in the above embodiment, the slot structure is flexible, providing better spectrum utilization.

[0072] In one embodiment, 12 bits in the PSBCH (i.e., α0, α1, α2, α3, ..., α 11 ) is used to indicate the SL TDD configuration.

[0073] α0 is used to distinguish whether one or two patterns are configured: if only one pattern is configured, α0=0, and if two patterns are configured, α0=1.

[0074] α1, α2, α3, α4 are used to indicate the period. If only one pattern (i.e., pattern 1) is configured, the period is determined by Table 1. If two patterns (i.e., both pattern 1 and pattern 2) are configured, the period is determined by Table 2.

[0075] α5, α6, α7, α8, α9, α 10 , α 11 u SL slots which, when α0=1, is determined by the following equation:

[0076]

number

[0077] L is the number of symbols in a slot. If the cyclic prefix of SL is extended CP, then L is equal to 12; otherwise, L is equal to 14.

[0078] I1 is

number

[0079] I2 is

number

[0080] Y is the sidelink starting symbol index within the slot provided by the higher layer parameters.

[0081] w is the granularity of the slot indication as described in Table 2.

[0082] μ equal to 0, 1, 2, or 3 corresponds to the SL subcarrier spacing defined in Table 3.

[0083] μ ref is the reference SCS configured by referenceSubcarrierSpacing in TDD-UL-DL-ConfigCommon.

[0084] u slots is the number of slots with only uplink symbols configured by nrofUplinkSlots in pattern 1.

[0085] u sym is the number of uplink symbols configured by nrofUplinkSymbols in Pattern 1.

[0086] u slots,2 is the number of slots with only uplink symbols configured by nrofUplinkSlots in pattern 2.

[0087] u sym,2 is the number of uplink symbols configured by nrofUplinkSymbols in Pattern 2.

[0088] P is the period of Pattern 1 listed in Table 2.

[0089] Table 1: Slot configuration period when one pattern is specified

[0090] [Table 1]

[0091] Table 2: Slot configuration period and granularity when two patterns are specified

[0092] [Table 2]

[0093] Table 3: SL Subcarrier Spacing

[0094] [Table 3]

[0095] In some embodiments, if a network node (eg, a base station) configures only pattern 1, the following information is determined by the information carried in the PSBCH:

[0096] 1. Periodicity.

[0097] 2. Number of UL slots or number of SL slots.

[0098] 3. Reference SCS.

[0099] The periodicity is determined by the periodicity configured in Pattern 1, the number of UL slots is determined by the number of UL shots configured in Pattern 1, and the reference SCS is the reference subcarrier spacing used to determine the time domain boundary. If SL is deployed on the Uu carrier, only UL resources can be used for SL transmission. For example, in case of a TDD system, only UL slots or UL symbols can be used for SL transmission, and in case of an FDD system, SL transmission can be deployed only on the UL band. Alternatively, the number of SL slots and / or the number of SL symbols can be indicated in the PSBCH. In another embodiment, the number of SL slots and / or the number of SL symbols can be determined by information carried in the PSBCH. The number of SL slots is determined by the number of UL slots configured in Pattern 1. The number of SL symbols is determined by the number of UL symbols configured in Pattern 1.

[0100] For example, a network node configures Pattern 1 in TDD-UL-DL-ConfigCommon. And the parameter referenceSubcarrierSpacing is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (which can be 3 ms in another example), and the number of UL slots is set to 1.

[0101] For PSBCH, the parameter reference SCS is set to 15 kHz, which is set to the same value as the parameter referenceSubcarrierSpacing configured by the network node. The parameter periodicity in PSBCH is 5 ms (in another example, it can be 3 ms). The information of the number of UL (or SL) slots in PSBCH is determined by the number of UL slots in pattern 1. In this case, the number of UL slots in PSBCH is 1.

[0102] For example, a network node configures Pattern 1 in TDD-UL-DL-ConfigCommon. And the parameter referenceSubcarrierSpacing is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (which can be 3 ms in another example), and the number of UL slots is set to 1.

[0103] For PSBCH, the parameter reference SCS can be set to 30 kHz, which is twice the parameter referenceSubcarrierSpacing configured by the network node. The parameter periodicity in PSBCH is 5 ms (in another example, it can be 3 ms). The information of the number of UL (or SL) slots in PSBCH is determined by the number of UL slots in pattern 1 and the scale between the reference SCS in PSBCH and referenceSubcarrierSpacing. In this case, it is 2, which corresponds to one UL slot in pattern 1 considering different reference SCS. The above embodiment can reduce the payload size of the information (such as TDD configuration) carried in PSBCH. Furthermore, in the above embodiment, the slot structure is flexible and better spectrum utilization is provided.

[0104] In some embodiments, if a network node (eg, a base station) configures only pattern 1, the following information is determined by the information carried in the PSBCH:

[0105] 1. Periodicity.

[0106] 2. Number of UL slots or number of SL slots.

[0107] The periodicity is determined by the periodicity configured in Pattern 1, and the number of UL slots is determined by the number of UL slots configured in Pattern 1. If SL is deployed on the Uu carrier, only UL resources can be used for SL transmission. For example, in case of a TDD system, only UL slots or UL symbols can be used for SL transmission, and in case of an FDD system, SL transmission can be deployed only on the UL band. Alternatively, the number of SL slots and / or the number of SL symbols can be indicated in the PSBCH. In another embodiment, the number of SL slots and / or the number of SL symbols can be determined by information carried in the PSBCH. The number of SL slots is determined by the number of UL slots configured in Pattern 1. The number of SL symbols is determined by the number of UL symbols configured in Pattern 1.

[0108] For example, the network configures only Pattern 1 in TDD-UL-DL-ConfigCommon, and the parameter referenceSubcarrierSpacing is set to 15 kHz. In Pattern 1, the parameter dl-UL-TransmissionPeriodicity is set to 5 ms (which can be 3 ms in another example), and the number of UL slots is set to 1.

[0109] In one embodiment, the predefined reference SCS (denoted as the second reference SCS) is 15 kHz. The parameter periodicity in the PSBCH is set to the same value as the parameter dl-UL-TransmissionPeriodicity in Pattern 1. The periodicity is therefore 5 ms (in another example it can be 3). The information of the number of UL (or SL) slots in the PSBCH is determined by the number of UL slots in Pattern 1. Since the parameter referenceSubcarrierSpacing is the same as the sidelink SCS, the number of UL slots in the PSBCH is 1.

[0110] In one embodiment, the predefined reference SCS (denoted as the second reference SCS) is 30 kHz. The parameter periodicity in the PSBCH is set to the same value as the parameter dl-UL-TransmissionPeriodicity in Pattern 1. The periodicity is therefore 5 ms (in another example, it can be 3 ms). The information of the number of UL (or SL) slots in the PSBCH is determined by the corresponding number of UL slots in Pattern 1. Considering that the second reference SCS is twice the parameter referenceSubcarrierSpacing, the number of UL (or SL) slots in the PSBCH is 2, which is determined by the number of UL slots in Pattern 1 and the scale between the second reference SCS and referenceSubcarrierSpacing. The above embodiment can reduce the payload size of the information (such as TDD configuration) attached in the PSBCH. Furthermore, in the above embodiment, the slot structure is flexible, and better spectrum utilization is provided.

[0111] Commercial interests of some embodiments are as follows: 1. To reduce the payload size of the information (such as TDD configuration) carried in PSBCH. 2. The slot structure is flexible, providing better spectrum utilization. 3. To provide good communication performance. 4. To provide high reliability. 5. Some embodiments of the present disclosure are used by 5G-NR chipset vendors, V2X communication system development vendors, automobile manufacturers including automobiles, trains, trucks, buses, bicycles, motorcycles, helmets, etc., drones (unmanned aerial vehicles), smartphone manufacturers, communication devices for public safety, AR / VR device manufacturers for games, conferences / seminars, education, etc. Some embodiments of the present disclosure create an end product by combining "techniques / processes" that can be adopted in 3GPP specifications. Some embodiments of the present disclosure propose a technical mechanism.

[0112] 4 is a block diagram illustrating an example system 664 for wireless communication according to one embodiment of the disclosure. The embodiments described herein may be implemented into a system using any suitably configured hardware and / or software. FIG. 4 illustrates a system 664 including a radio frequency (RF) circuit 560, a baseband circuit 654, an application circuit 664, a memory / storage 560, a display 564, a camera 640, a sensor 647, and an input / output (I / O) interface 654 coupled together at least as shown.

[0113] The application circuitry 664 may include circuits such as, but are not limited to, one or more single-core or multi-core processors. The processor may include any combination of general-purpose processors and special-purpose processors, such as graphics processors and application processors. The processor may be coupled with memory / storage and configured to enable various applications and / or operating systems to run on the system by executing instructions stored in the memory / storage. The baseband circuitry 654 may include circuits such as, but are not limited to, one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuitry may handle various radio control functions that enable communication with one or more wireless networks via RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide communication compatible with one or more wireless technologies. For example, in some embodiments, the baseband circuitry may support communication with an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and / or other Wireless Metropolitan Area Networks (WMANs), Wireless Local Area Networks (WLANs), Wireless Personal Area Networks (WPANs), etc. Embodiments in which the baseband circuitry is configured to support wireless communication of more than one wireless protocol may be referred to as multimode baseband circuitry.

[0114] In various embodiments, the baseband circuitry 654 may include circuitry for operating using signals that are not strictly considered to be at baseband frequencies. For example, in some embodiments, the baseband circuitry may include circuitry for operating using signals having intermediate frequencies located between baseband frequencies and radio frequencies. The RF circuitry 560 may enable communication with a wireless network using modulated electromagnetic radiation over a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, the RF circuitry 560 may include circuitry for operating using signals that are not strictly considered to be at radio frequencies. For example, in some embodiments, the RF circuitry may include circuitry for operating using signals having intermediate frequencies located between baseband frequencies and radio frequencies.

[0115] In various embodiments, the transmit, control, or receive circuitry described above with respect to a user equipment, eNB, or gNB may be embodied in whole or in part in one or more of RF circuitry, baseband circuitry, and / or application circuitry. As used herein, "circuitry" may refer to, be part of, or include application specific integrated circuits (ASICs), electronic circuits, processors (shared, dedicated, or groups), and / or memories (shared, dedicated, or groups), combinatorial logic circuits, and / or other suitable hardware components that provide the described functionality, executing one or more software or firmware programs. In some embodiments, electronic device circuitry may be implemented in, or functionality associated with, one or more software or firmware modules. In some embodiments, some or all of the components of the baseband circuitry, application circuitry, and / or memory / storage may be implemented together on a system on a chip (SOC).

[0116] Memory / storage 560 may be used, for example, to load and store data and / or instructions for the system. Memory / storage for an embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM), and / or non-volatile memory, such as flash memory. In various embodiments, I / O interface 654 may include one or more user interfaces designed to enable user interaction with the system and / or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, and the like. Peripheral component interfaces include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power interface.

[0117] In various embodiments, the sensors 647 may include one or more sensing devices for determining environmental conditions and / or location information associated with the system. In some embodiments, the sensors may include, but are not limited to, gyro sensors, accelerometers, proximity sensors, ambient light sensors, and a positioning unit. The positioning unit may also be part of or interact with baseband and / or RF circuitry to communicate with components of a positioning network, such as to communicate with Global Positioning System (GPS) satellites.

[0118] In various embodiments, the display 564 may include displays such as liquid crystal displays and touch screen displays. In various embodiments, the system 664 may be a mobile computing device, such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, and the like. In various embodiments, the system may have more or fewer components and / or a different architecture. Where appropriate, the methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.

[0119] Those skilled in the art will understand that each unit, algorithm, and step described and disclosed in the embodiments of the present disclosure can be realized using electronic hardware, or using a combination of computer software and electronic hardware. Whether a function is implemented in hardware or software depends on the application conditions and design requirements for technical planning. Those skilled in the art may use different aspects to realize the function for each specific application, but such realization does not exceed the scope of the present disclosure. Those skilled in the art will understand that the operation processes of the systems, devices, and units in the above-mentioned embodiments are basically the same, so that they can be referred to the operation processes of the above-mentioned systems, devices, and units. For ease of explanation and simplification, these operation processes will not be described in detail.

[0120] It is understood that the system, device, and method disclosed in the embodiments of the present disclosure may be realized in other manners. The above-mentioned embodiments are merely exemplary. The division of units is based on logical functions only, and other divisions exist in the realization. It is possible to combine or integrate multiple units or components into other systems. It is also possible to omit or skip some characteristics. On the other hand, the mutual coupling, direct coupling, or communication coupling shown or discussed operates in an electrical form, a mechanical form, or in other types of forms, indirectly or communicatively through some ports, devices, or units. The units shown as separate components for the purpose of the description may or may not be physically separated. The units shown may or may not be physical units, i.e., located in one place or distributed over multiple network units. Some units or all units may be used according to the purpose of the embodiment. Moreover, each of the functional units in each embodiment may be integrated within a single processing unit, or may be physically separate, or may be integrated within a single processing unit having two or more units.

[0121] When a software functional unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on such understanding, the technical plan proposed by the present disclosure can be essentially or partially realized in the form of a software product. Alternatively, a part of the technical plan that is useful for the prior art can be realized in the form of a software product. The software product in a computer is stored in a storage medium, including a number of commands for a computing device (such as a personal computer, a server, or a network device) to execute all or part of the steps disclosed by the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other types of media that can store program code.

[0122] Although the present disclosure has been described in connection with what is believed to be the most practical and preferred embodiments, it will be understood that the present disclosure is not limited to the disclosed embodiments, but is intended to encompass various configurations that may be implemented without departing from the broadest scope of the appended claims.

Claims

1. 1. A method for transmitting a physical sidelink broadcast channel (PSBCH) of a first user equipment, comprising: transmitting, by the first user equipment, a PSBCH carrying information to one or more second user equipments, the information carried in the PSBCH being used to determine a periodicity and a number of slots, the slots including side link (SL) slots; obtaining, by the one or more second user equipments, a first reference subcarrier spacing (SCS), the first reference SCS being configured by a network; The number of slots determined by the information carried in the PSBCH is further determined by the one or more second user equipments based on the first reference SCS and a second reference SCS, and the second reference SCS is pre-configured or pre-defined or determined by the information carried in the PSBCH. method.

2. 2. The method of claim 1, wherein only Pattern 1 is configured by a network, and the information carried in the PSBCH is determined by parameters configured in Pattern 1.

3. The method of claim 2 , wherein the periodicity determined by the information carried in the PSBCH is determined by a periodicity configured in the pattern 1 .

4. The method according to claim 2 or 3, wherein the number of slots determined by the information carried in the PSBCH is determined by the number of slots configured in the pattern 1.

5. The method of claim 4 , wherein the slots configured in the pattern 1 include UL slots.

6. 2. The method of claim 1, wherein both Pattern 1 and Pattern 2 are configured by a network, and the information carried in the PSBCH is determined by parameters configured in Pattern 1 and / or Pattern 2.

7. 7. The method of claim 6, wherein the periodicity determined by the information carried in the PSBCH is determined by a first periodicity configured in the pattern 1 and a second periodicity configured in the pattern 2.

8. 8. The method according to claim 6 or 7, wherein the number of slots determined by the information carried in the PSBCH is determined by the number of slots configured in at least one of the pattern 1 and the pattern 2.

9. The method of claim 8 , wherein the slots configured in at least one of the pattern 1 and the pattern 2 include UL slots.

10. The method according to any one of claims 1 to 9, wherein the information carried in the PSBCH further determines a number of symbols, the symbols including SL symbols.

11. The method according to any one of claims 1 to 10, wherein the first user equipment is located within the coverage area of ​​a cell.

12. A second user equipment for receiving a Physical Sidelink Broadcast Channel (PSBCH), the second user equipment being configured to implement the method according to any one of claims 1 to 11.

13. A chip including a processor, A chip, the processor configured to call and execute a computer program stored in a memory to cause a device in which the chip is installed to execute the second user equipment method of any one of claims 1 to 11.

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