CN117461378A - Method and apparatus for performing SL DRX operation in NR V2X - Google Patents
Method and apparatus for performing SL DRX operation in NR V2X Download PDFInfo
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Abstract
A method for a first device to perform wireless communication and an apparatus supporting the same are provided. The method may comprise the steps of: obtaining a Side Link (SL) Discontinuous Reception (DRX) configuration comprising information related to a SL DRX slot offset and information related to a SL DRX timer; starting an SL DRX timer; receiving second side chain control information (SCI) and a first SCI for scheduling a physical side link shared channel (PSSCH) from a second device via a physical side link control channel (PSCCH); and receiving a second SCI and a Media Access Control (MAC) Packet Data Unit (PDU) from the second device via the PSSCH. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information about quality of service (QoS).
Description
Technical Field
The present disclosure relates to wireless communication systems.
Background
Side Link (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly with each other without intervention of an evolved node B (eNB). SL communication is being considered as a solution for eNB overhead due to the rapid increase of data traffic. V2X (vehicle to everything) refers to a communication technology in which vehicles are used to exchange information with other vehicles, pedestrians, objects equipped with infrastructure, and the like. V2X can be classified into four types such as V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian). V2X communication may be provided through a PC5 interface and/or Uu interface.
Furthermore, as more and more communication devices require larger communication capacity, the need for enhanced mobile broadband communication relative to conventional Radio Access Technologies (RATs) is rising. Thus, reliability and latency sensitive services or User Equipment (UE) have been discussed. Also, next generation radio access technologies based on enhanced mobile broadband communication, large-scale Machine Type Communication (MTC), ultra-reliable low latency communication (URLLC), etc. may be referred to as new Radio Access Technologies (RATs) or New Radios (NRs). Herein, NR may also support vehicle-to-everything (V2X) communication.
Disclosure of Invention
Technical purpose
Meanwhile, for example, a DRX cycle offset (DRX-cycle offset) in NR Uu DRX may be used as an offset indicating (or informing) the starting point of the DRX cycle. Also, a DRX slot offset (DRX-slotooffset) in NR Uu DRX may be used as an offset indicating a start point of the SL DRX on duration timer. The UE may wake up in advance at a time slot as much as a power saving (ps_offset) Offset from a start point of a DRX on duration timer indicated (or notified) by a DRX cycle Offset (DRX-cycle Offset), and may monitor a wake-up signal transmitted (or delivered) from the base station. And, when the UE receives the wake-up signal from the base station, the UE may determine whether to skip the next DRX on duration or monitor the PDCCH of the base station at the next DRX on duration based on the contents notified by the wake-up signal.
Also, for power saving of the UE in NR V2X, a side link DRX configuration for side link DRX operation may be defined. However, in the case of using a side link DRX configuration in multicast/broadcast, the SL DRX cycle and/or the SL DRX timer (e.g., the SL DRX on duration timer) may not meet quality of service (QoS) requirements for side link data of the multicast/broadcast service.
Technical proposal
According to an embodiment, a method for performing wireless communication by a first device is provided herein. The method may comprise the steps of: acquiring a SL DRX configuration, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer; starting the SL DRX timer; receiving first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from a second device over a physical side link control channel (PSCCH); and receiving the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device over the PSSCH. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type, and the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, a first apparatus for performing wireless communication is provided herein. The first apparatus may include: one or more memories storing instructions; one or more transceivers; and one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors are executable with the instructions to: acquiring a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer, and starting the SL DRX timer. For example, the one or more processors may execute the instructions to receive, from a second apparatus over a physical side link control channel (PSCCH), first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH). For example, the one or more processors can execute the instructions to receive the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device via the PSSCH. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to embodiments, an apparatus configured to control a first User Equipment (UE) is provided herein. The apparatus may include: one or more processors; and one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors are executable to: a SL DRX configuration is obtained, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute the instructions to start the SL DRX timer. For example, the one or more processors may execute the instructions to receive, from a second UE over a physical side link control channel (PSCCH), first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH). For example, the one or more processors can execute the instructions to receive the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second UE over the PSSCH. For example, the one or more processors can execute the instructions to enable the second SCI and the SL DRX configuration to be associated with a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, a non-transitory computer-readable medium having instructions recorded thereon is provided herein. The instructions, when executed by one or more processors, may cause the one or more processors to: a SL DRX configuration is obtained by a first device, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the instructions, when executed by one or more processors, may cause the one or more processors to start the SL DRX timer via the first device. For example, the instructions, when executed by one or more processors, may cause the one or more processors to receive, by the first apparatus, first Sidelink Control Information (SCI) from a second apparatus over a Physical Sidelink Control Channel (PSCCH) for scheduling a second SCI and a Physical Sidelink Shared Channel (PSSCH). For example, the instructions, when executed by one or more processors, may cause the one or more processors to receive, by the first device, the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device over the PSSCH. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, a method for performing wireless communication by a second device is provided herein. The method may comprise the steps of: acquiring a SL DRX configuration, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer;
transmitting first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first device through a physical side link control channel (PSCCH); and transmitting the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) to the first device over the PSSCH. For example, the SL DRX timer is started. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type, and the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, a second apparatus for performing wireless communication is provided herein. The second apparatus may include: one or more memories storing instructions; one or more transceivers; and one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors are executable with the instructions to obtain a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute the instructions to send first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first device over a physical side link control channel (PSCCH). For example, the one or more processors can execute the instructions to send the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) to the first device via the PSSCH. For example, the SL DRX timer may be started. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, an apparatus configured to control a second User Equipment (UE) is provided herein. The apparatus may include: one or more processors; and one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors are executable to obtain a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute the instructions to send first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first UE over a physical side link control channel (PSCCH). For example, the one or more processors can execute the instructions to send the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) to the first UE via the PSSCH. For example, the SL DRX timer may be started. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, an apparatus configured to control a second User Equipment (UE) is provided herein. The apparatus may include: one or more processors; and one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors are executable to obtain a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute the instructions to send first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first UE over a physical side link control channel (PSCCH). For example, the one or more processors can execute the instructions to send the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) to the first UE via the PSSCH. For example, the SL DRX timer may be started. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment, a non-transitory computer-readable medium having instructions recorded thereon is provided herein. The instructions, when executed by one or more processors, cause the one or more processors to obtain, by a second device, a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. The instructions, when executed by one or more processors, cause the one or more processors to transmit, by the second device, first Sidelink Control Information (SCI) for scheduling a second SCI and a Physical Sidelink Shared Channel (PSSCH) to a first device over a Physical Sidelink Control Channel (PSCCH). For example, the instructions, when executed by one or more processors, cause the one or more processors to transmit, by the second device, the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device over the PSSCH. For example, the SL DRX timer may be started. For example, the second SCI and the SL DRX configuration may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
Advantageous effects
The UE can efficiently perform side link communication.
Drawings
Fig. 1 shows a structure of an NR system according to an embodiment of the present disclosure.
Fig. 2 illustrates a radio protocol architecture in accordance with an embodiment of the present disclosure.
Fig. 3 shows a structure of a radio frame of NR according to an embodiment of the present disclosure.
Fig. 4 illustrates a structure of a slot of an NR frame according to an embodiment of the present disclosure.
Fig. 5 illustrates an example of BWP according to an embodiment of the present disclosure.
Fig. 6 illustrates a process of performing V2X or SL communication by a UE based on a transmission mode, according to an embodiment of the present disclosure.
Fig. 7 illustrates three broadcast types according to an embodiment of the present disclosure.
Fig. 8 illustrates a diagram describing a problem in a method for performing SL DRX operation according to an embodiment of the present disclosure.
Fig. 9 shows a diagram describing a method for performing SL DRX operation according to an embodiment of the present disclosure.
Fig. 10 shows a diagram describing a procedure for performing SL DRX operation according to an embodiment of the present disclosure.
Fig. 11 illustrates a method for a first device to perform wireless communication according to an embodiment of the present disclosure.
Fig. 12 illustrates a method for a second device to perform wireless communication according to an embodiment of the present disclosure.
Fig. 13 shows a communication system 1 according to an embodiment of the present disclosure.
Fig. 14 illustrates a wireless device in accordance with an embodiment of the present disclosure.
Fig. 15 illustrates a signal processing circuit for transmitting a signal according to an embodiment of the present disclosure.
Fig. 16 illustrates another example of a wireless device in accordance with an embodiment of the present disclosure.
Fig. 17 illustrates a handheld device in accordance with an embodiment of the present disclosure.
Fig. 18 illustrates a vehicle or autonomous vehicle in accordance with an embodiment of the present disclosure.
Detailed Description
In this disclosure, "a or B" may mean "a only", "B only" or "both a and B". In other words, in the present disclosure, "a or B" may be interpreted as "a and/or B". For example, in this disclosure, "A, B or C" may mean any combination of "a only", "B only", "C only" or "A, B, C".
A slash (/) or comma as used in this disclosure may mean "and/or". For example, "A/B" may mean "A and/or B". Thus, "a/B" may mean "a only", "B only" or "both a and B". For example, "A, B, C" may mean "A, B or C".
In the present disclosure, "at least one of a and B" may mean "a only", "B only", or "both a and B". In addition, in the present disclosure, the expression "at least one of a or B" or "at least one of a and/or B" may be interpreted as "at least one of a and B".
In addition, in the present disclosure, "at least one of A, B and C" may mean "a only", "B only", "C only", or "A, B and C in any combination. In addition, "at least one of A, B or C" or "at least one of A, B and/or C" may mean "at least one of A, B and C".
In addition, brackets used in this disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of the "control information". Specifically, when indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".
In the following description, "when …, if or in the case of …," may be replaced with "based on.
The technical features separately described in one drawing in the present disclosure may be implemented separately or may be implemented simultaneously.
In the present disclosure, higher layer parameters may be parameters configured, pre-configured, or predefined for the UE. For example, the base station or network may send higher layer parameters to the UE. For example, higher layer parameters may be sent through Radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling.
The techniques described below may be used in various wireless communication systems such as Code Division Multiple Access (CDMA), frequency Division Multiple Access (FDMA), time Division Multiple Access (TDMA), orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA may be implemented using a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may be implemented using radio technologies such as global system for mobile communications (GSM)/General Packet Radio Service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolved UTRA (E-UTRA), and so on. IEEE 802.16m is an evolving version of IEEE 802.16e and provides backward compatibility for IEEE 802.16 e-based systems. UTRA is part of Universal Mobile Telecommunications System (UMTS). The third generation partnership project (3 GPP) Long Term Evolution (LTE) is part of evolved UMTS (E-UMTS) that uses E-UTRA. The 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-advanced (LTE-a) is an evolution of LTE.
The 5G NR is an LTE-a successor technology corresponding to a novel completely new mobile communication system having characteristics of high performance, low latency, high availability, and the like. The 5G NR may use resources including all available frequency spectrums of a low frequency band less than 1GHz, an intermediate frequency band from 1GHz to 10GHz, and a high frequency (millimeter wave) of 24GHz or more, and the like.
For clarity of description, the following description will focus mainly on LTE-a or 5G NR. However, technical features according to embodiments of the present disclosure will not be limited thereto.
Fig. 1 shows a structure of an NR system according to an embodiment of the present disclosure. The embodiment of fig. 1 may be combined with various embodiments of the present disclosure.
Referring to fig. 1, a next generation radio access network (NG-RAN) may include a BS20 providing user plane and control plane protocol termination to a UE 10. For example, the BS20 may include a next generation node B (gNB) and/or an evolved node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to as other terminology such as a Mobile Station (MS), a User Terminal (UT), a Subscriber Station (SS), a Mobile Terminal (MT), a wireless device, etc. For example, a BS may be referred to as a fixed station that communicates with the UEs 10 and may be referred to as other terms such as a Base Transceiver System (BTS), an Access Point (AP), and the like.
The embodiment of fig. 1 illustrates a case where only the gNB is included. BS20 may be interconnected via an Xn interface. The BS20 may be interconnected via a fifth generation (5G) core network (5 GC) and NG interface. More specifically, the BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a User Plane Function (UPF) 30 via an NG-U interface.
The radio interface protocol layers between the UE and the network may be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the Open System Interconnection (OSI) model well known in communication systems. Wherein a Physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel, and a Radio Resource Control (RRC) layer located at the third layer controls radio resources between the UE and the network. For this, the RRC layer exchanges RRC messages between the UE and the BS layer.
Fig. 2 illustrates a radio protocol architecture in accordance with an embodiment of the present disclosure. The embodiment of fig. 2 may be combined with various embodiments of the present disclosure. Specifically, (a) in fig. 2 shows a radio protocol stack of a user plane for Uu communication, and (b) in fig. 2 shows a radio protocol stack of a control plane for Uu communication. Fig. 2 (c) shows a radio protocol stack of a user plane for SL communication, and fig. 2 (d) shows a radio protocol stack of a control plane for SL communication.
Referring to fig. 2, a physical layer provides an information transfer service to an upper layer through a physical channel. The physical layer is connected to a Medium Access Control (MAC) layer, which is an upper layer of the physical layer, through a transport channel. Data is transferred between the MAC layer and the physical layer through a transport channel. The transport channels are classified according to how data is transmitted over the radio interface and what characteristics the data is transmitted.
Data is transferred between different physical layers (i.e., PHY layer of a transmitter and PHY layer of a receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.
The MAC layer provides services to a Radio Link Control (RLC) layer, which is a higher layer of the MAC layer, via a logical channel. The MAC layer provides a function of mapping a plurality of logical channels to a plurality of transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping a plurality of logical channels to a single transport channel. The MAC layer provides a data transfer service through a logical channel.
The RLC layer performs concatenation, segmentation and reassembly of radio link control service data units (RLC SDUs). In order to ensure different quality of service (QoS) required for Radio Bearers (RBs), the RLC layer provides three types of operation modes, namely a Transparent Mode (TM), a non-acknowledged mode (UM), and an Acknowledged Mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).
The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer serves to control logical channels, transport channels, and physical channels associated with configuration, reconfiguration, and release of RBs. The RB is a logical path for data delivery between the UE and the network provided by the first layer (i.e., physical layer or PHY layer) and the second layer (i.e., MAC layer, RLC layer, packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (SDAP) layer).
The functions of Packet Data Convergence Protocol (PDCP) in the user plane include delivery of user data, header compression, and ciphering. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include delivery of control plane data and ciphering/integrity protection.
The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs a mapping between quality of service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) flags in both DL packets and UL packets.
Configuration of the RB means a process for designating a radio protocol layer and channel properties to provide a specific service and for determining corresponding detailed parameters and operation methods. RBs may then be classified into two types, namely, signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs). The SRB is used as a path for transmitting the RRC message in the control plane. The DRB is used as a path for transmitting user data in the user plane.
When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in an RRC CONNECTED (rrc_connected) state, otherwise the UE may be in an RRC IDLE (rrc_idle) state. In the case of NR, an RRC INACTIVE (rrc_inactive) state is additionally defined, and a UE in the rrc_inactive state may maintain a connection with the core network and release its connection with the BS.
Data is transmitted from the network to the UE over a downlink transport channel. Examples of the downlink transport channels include a Broadcast Channel (BCH) for transmitting system information and a downlink Shared Channel (SCH) for transmitting user traffic or control messages. Traffic or control messages of a downlink multicast or broadcast service may be transmitted on the downlink SCH or may be transmitted on an additional downlink Multicast Channel (MCH). Further, data is transmitted from the UE to the network over an uplink transport channel. Examples of the uplink transport channel include a Random Access Channel (RACH) transmitting an initial control message and an uplink Shared Channel (SCH) transmitting user traffic or control messages.
Examples of logical channels belonging to a higher layer of a transport channel and mapped to the transport channel may include a broadcast channel (BCCH), a Paging Control Channel (PCCH), a Common Control Channel (CCCH), a Multicast Control Channel (MCCH), a Multicast Traffic Channel (MTCH), and the like.
Fig. 3 illustrates a structure of a radio frame of NR according to an embodiment of the present disclosure. The embodiment of fig. 3 may be combined with various embodiments of the present disclosure.
Referring to fig. 3, in NR, a radio frame may be used to perform uplink and downlink transmission. The radio frame is 10ms in length and may be defined as being made up of two fields (HF). A field may include five 1ms Subframes (SFs). A Subframe (SF) may be divided into one or more slots, and the number of slots within the subframe may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM (a) symbols according to a Cyclic Prefix (CP).
In case of using the normal CP, each slot may include 14 symbols. In case of using the extended CP, each slot may include 12 symbols. Herein, the symbols may include OFDM symbols (or CP-OFDM symbols) and single carrier-FDMA (SC-FDMA) symbols (or discrete fourier transform spread OFDM (DFT-s-OFDM) symbols).
Table 1 shown below shows the number of symbols (N) per slot according to SCS configuration (u) in case of employing normal CP slot symb ) Number of slots per frame (N frame,u slot ) And the number of slots per subframe (N subframe,u slot )。
TABLE 1
| SCS(15*2 u ) | N slot symb | N frame,u slot | N subframe,u slot |
| 15KHz(u＝0) | 14 | 10 | 1 |
| 30KHz(u＝1) | 14 | 20 | 2 |
| 60KHz(u＝2) | 14 | 40 | 4 |
| 120KHz(u＝3) | 14 | 80 | 8 |
| 240KHz(u＝4) | 14 | 160 | 16 |
Table 2 shows examples of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS in the case of using the extended CP.
TABLE 2
| SCS(15*2 u ) | N slot symb | N frame,u slot | N subframe,u slot |
| 60KHz(u＝2) | 12 | 40 | 4 |
In an NR system, OFDM (a) parameter sets (e.g., SCS, CP length, etc.) between a plurality of cells integrated into one UE may be configured differently. Thus, the (absolute time) duration (or interval) of a time resource (e.g., a subframe, a slot, or a TTI) consisting of the same number of symbols, collectively referred to as a Time Unit (TU) for simplicity, may be configured differently in the integrated cell.
In the NR, a plurality of parameter sets or SCSs for supporting various 5G services may be supported. For example, in the case of an SCS of 15kHz, a wide range of conventional cellular bands can be supported, and in the case of an SCS of 30kHz/60kHz, dense cities, lower latency, wider carrier bandwidths can be supported. In the case where the SCS is 60kHz or more, in order to overcome the phase noise, a bandwidth of more than 24.25GHz can be used.
The NR frequency bands can be defined as two different types of frequency ranges. Two different types of frequency ranges may be FR1 and FR2. The values of the frequency ranges may be changed (or varied), for example, two different types of frequency ranges may be as shown in table 3 below. Among frequency ranges used in NR systems, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).
TABLE 3
| Frequency range assignment | Corresponding frequency range | Subcarrier spacing (SCS) |
| FR1 | 450MHz–6000MHz | 15、30、60kHz |
| FR2 | 24250MHz–52600MHz | 60、120、240kHz |
As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in table 4 below, FR1 may include a bandwidth in the range of 410MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6GHz (or 5850, 5900, 5925MHz, etc.) and higher. For example, the frequency bands of 6GHz (or 5850, 5900, 5925MHz, etc.) and higher included in FR1 may include unlicensed bands. The unlicensed band may be used for various purposes, for example, for vehicle-specific communications (e.g., autopilot).
TABLE 4
| Frequency range assignment | Corresponding frequency range | Subcarrier spacing (SCS) |
| FR1 | 410MHz–7125MHz | 15、30、60kHz |
| FR2 | 24250MHz–52600MHz | 60、120、240kHz |
Fig. 4 illustrates a structure of a slot of an NR frame according to an embodiment of the present disclosure. The embodiment of fig. 4 may be combined with various embodiments of the present disclosure.
Referring to fig. 4, a slot includes a plurality of symbols in a time domain. For example, in the case of a normal CP, one slot may include 14 symbols. For example, in the case of the extended CP, one slot may include 12 symbols. Alternatively, in case of the normal CP, one slot may include 7 symbols. However, in the case of the extended CP, one slot may include 6 symbols.
The carrier comprises a plurality of subcarriers in the frequency domain. A Resource Block (RB) may be defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (physical) resource blocks ((P) RBs) in the frequency domain, and the BWP may correspond to one parameter set (e.g., SCS, CP length, etc.). The carrier may include up to N BWP (e.g., 5 BWP). The data communication may be performed via an activated BWP. Each element may be referred to as a Resource Element (RE) in the resource grid, and one complex symbol may be mapped to each element.
Hereinafter, a bandwidth part (BWP) and a carrier will be described in detail.
BWP may be a contiguous set of Physical Resource Blocks (PRBs) within a given parameter set. The PRBs may be selected from a contiguous set of portions of a Common Resource Block (CRB) for a given set of parameters on a given carrier.
For example, the BWP may be at least any one of an active BWP, an initial BWP, and/or a default BWP. For example, the UE may not monitor downlink radio link quality in DL BWP other than active DL BWP on the primary cell (PCell). For example, the UE may not receive a PDCCH, a Physical Downlink Shared Channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) other than the active DL BWP. For example, the UE may not trigger a Channel State Information (CSI) report for the inactive DL BWP. For example, the UE may not transmit a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) outside the active UL BWP. For example, in the downlink case, the initial BWP may be given as a continuous set of RBs (configured by a Physical Broadcast Channel (PBCH)) for a Remaining Minimum System Information (RMSI) control resource set (CORESET). For example, in the case of uplink, the initial BWP may be given by a System Information Block (SIB) for a random access procedure. For example, the default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be the initial DL BWP. To save power, if the UE cannot detect Downlink Control Information (DCI) during a specified period, the UE may switch the active BWP of the UE to a default BWP.
Furthermore, BWP may be defined for SL. The same SL BWP may be used in transmission and reception. For example, the transmitting UE may transmit a SL channel or SL signal on a specific BWP, and the receiving UE may receive the SL channel or SL signal on the specific BWP. In the licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for SL BWP from the BS/network. For example, the UE may receive a configuration for Uu BWP from the BS/network. SL BWP is (pre) configured in the carrier for out-of-coverage NR V2X UEs and rrc_idle UEs. For UEs in rrc_connected mode, at least one SL BWP may be activated in the carrier.
Fig. 5 illustrates an example of BWP according to an embodiment of the present disclosure. The embodiment of fig. 5 may be combined with various embodiments of the present disclosure. It is assumed that in the embodiment of fig. 5, the number of BWP is 3.
Referring to fig. 5, a Common Resource Block (CRB) may be a carrier resource block numbered from one end of a carrier band to the other end thereof. In addition, PRBs may be resource blocks numbered within each BWP. Point a may indicate a common reference point for the resource block grid.
Can be defined by point A, offset (N start BWP ) Sum bandwidth (N) size BWP ) To configure BWP. For example, point a may be an external reference point of the PRBs of the carrier, with subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) aligned in point a. For example, the offset may be the PRB distance between the lowest subcarrier within a given parameter set and point a. For example, the bandwidth may be the number of PRBs within a given parameter set.
Hereinafter, V2X or SL communication will be described.
The Side Link Synchronization Signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for S-PSS, and a Golde (Gold) sequence of length 127 may be used for S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and S-SSS for acquisition of detailed synchronization and for detection of synchronization signal IDs.
The physical side link broadcast channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information that the UE must first know before SL signal transmission/reception. For example, the default information may be information related to SLSS, duplex Mode (DM), time Division Duplex (TDD) uplink/downlink (UL/DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits, including 24-bit Cyclic Redundancy Check (CRC).
The S-PSS, S-SSS, and PSBCH can be included in a block format supporting periodic transmission, e.g., a SL Synchronization Signal (SS)/PSBCH block, hereinafter, a side link synchronization signal block (S-SSB). The S-SSB may have the same parameter set (i.e., SCS and CP length) as the physical side link control channel (PSCCH)/physical side link shared channel (PSSCH) in the carrier, and the transmission bandwidth may exist within a (pre) configured Side Link (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SB). For example, the PSBCH may exist across 11 RBs. In addition, the frequency location of the S-SSB may be (pre) configured. Thus, the UE does not have to perform hypothesis detection at the frequency to find the S-SSB in the carrier.
Fig. 6 illustrates a process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure. The embodiment of fig. 6 may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for convenience of explanation, in LTE, a transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.
For example, (a) of fig. 6 shows UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, (a) in fig. 6 shows UE operation related to NR resource allocation pattern 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.
For example, (b) of fig. 6 shows UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, (b) of fig. 6 shows UE operation in relation to NR resource allocation pattern 2.
Referring to fig. 6 (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, a base station may schedule SL resources to be used by a UE for SL transmission. For example, in step S600, the base station may transmit information related to SL resources and/or information related to UL resources to the first UE. For example, UL resources may include PUCCH resources and/or PUSCH resources. For example, the UL resource may be a resource for reporting SL HARQ feedback to the base station.
For example, the first UE may receive information related to Dynamic Grant (DG) resources and/or information related to Configuration Grant (CG) resources from the base station. For example, CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, DG resources may be resources configured/allocated by a base station to a first UE through Downlink Control Information (DCI). In the present disclosure, CG resources may be (periodic) resources configured/allocated by the base station to the first UE through DCI and/or RRC messages. For example, in case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first UE. For example, in case of CG type 2 resources, the base station may transmit an RRC message including information related to CG resources to the first UE, and the base station may transmit DCI related to activation or release of CG resources to the first UE.
In step S610, the first UE may transmit a PSCCH (e.g., side chain control information (SCI) or first stage SCI) to the second UE based on the resource schedule. In step S620, the first UE may transmit a PSCCH (e.g., second stage SCI, MAC PDU, data, etc.) associated with the PSCCH to the second UE. In step S630, the first UE may receive a PSCCH/PSSCH related PSFCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE through the PSFCH. In step S640, the first UE may transmit/report HARQ feedback information to the base station through the PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a preconfigured rule. For example, the DCI may be DCI for SL scheduling. For example, the format of DCI may be DCI format 3_0 or DCI format 3_1.
Referring to (b) of fig. 6, in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE may determine SL transmission resources within the base station/network configured SL resources or preconfigured SL resources. For example, the configured SL resources or the pre-configured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmissions. For example, the UE may perform SL communication by autonomously selecting resources within a configured resource pool. For example, the UE may autonomously select resources within the selection window by performing a sensing procedure and a resource (re) selection procedure. For example, sensing can be performed in units of subchannels. For example, in step S610, the first UE, which has selected resources from the resource pool by itself, may transmit a PSCCH (e.g., side chain control information (SCI) or first stage SCI) to the second UE by using the resources. In step S620, the first UE may transmit a PSCCH (e.g., second stage SCI, MAC PDU, data, etc.) associated with the PSCCH to the second UE. In step S630, the first UE may receive a PSCCH/PSSCH related PSFCH from the second UE.
Referring to fig. 6 (a) or (b), for example, the first UE may transmit the SCI to the second UE through the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., a two-stage SCI) to the second UE over the PSCCH and/or PSSCH. In this case, the second UE may decode two consecutive SCIs (e.g., two-stage SCIs) to receive the PSSCH from the first UE. In the present disclosure, an SCI transmitted through a PSCCH may be referred to as a 1 st SCI, a first stage SCI, or a first stage SCI format, and an SCI transmitted through a PSSCH may be referred to as a 2 nd SCI, a second stage SCI, or a second stage SCI format. For example, the first stage SCI format may include SCI format 1-A, and the second stage SCI format may include SCI format 2-A and/or SCI format 2-B.
Hereinafter, an example of SCI format 1-a will be described.
SCI format 1-a is used to schedule PSSCH and second stage SCI on the PSSCH.
The following information is sent via SCI format 1-a:
priority-3 bits
-frequency resource assignment-ceilling (log) when the value of the higher layer parameter sl-MaxNumPerReserve is configured to be 2 2 (N SL subChannel (N SL subChannel +1)/2) bits; otherwise, the higher-layer parameter sl-MaxNumPerReserve is found to be ceilling log when the value of the higher-layer parameter sl-MaxNumPerReserve is configured to be 3 2 (N SL subChannel (N SL subChannel +1)(2N SL subChannel +1)/6) bits
-time resource assignment-5 bits when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2; otherwise, 9 bits when the value of the higher layer parameter sl-MaxNumPerReserve is configured to be 3
Resource reservation period-if higher layer parameters sl-MultiReserve resource are configured, then blocking (log) 2 N rsv_period ) Bits, where N rsv_period Is the number of entries in the higher layer parameter sl-resourceReserve PeriodList; otherwise is 0 bit
-DMRS pattern-ceilling (log) 2 N pattern ) Bits, where N pattern The number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePattern List
Second stage SCI format-2 bits, as defined in Table 5
Beta_offset indicator-2 bits, as provided by the higher layer parameter sl-BetaOffsets2ndSCI
-DMRS port number-1 bit, as defined in table 6
Modulation and coding scheme-5 bits
-an Additional MCS Table indicator-1 bit if one MCS Table is configured by the higher layer parameter sl-Additional-MCS-Table; if two MCS tables are configured through a higher layer parameter sl-Additional-MCS-Table, the bit is 2; otherwise is 0 bit
-PSFCH overhead indication-1 bit if higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise is 0 bit
-reservation-number of bits determined by the higher layer parameter sl-numreservadbis, wherein the value is set to zero.
TABLE 5
| Second stage SCI format field value | Second stage SCI format |
| 00 | SCI Format 2-A |
| 01 | SCI Format 2-B |
| 10 | Reservation of |
| 11 | Reservation of |
TABLE 6
| Value of DMRS port number field | Antenna port |
| 0 | 1000 |
| 1 | 1000 1001 |
Hereinafter, an example of SCI format 2-a will be described.
SCI format 2-a is used for decoding of PSSCH, with HARQ operation when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes NACK only, or when there is no feedback of HARQ-ACK information.
The following information is sent by means of SCI format 2-a:
number of HARQ processes-4 bits
-new data indicator-1 bit
Redundancy version-2 bits
Source ID-8 bits
Destination ID-16 bits
-HARQ feedback enable/disable indicator-1 bit
Broadcast type indicator-2 bits, as defined in Table 7
-CSI request-1 bit
TABLE 7
Hereinafter, an example of SCI format 2-B will be described.
SCI format 2-B is used for decoding of PSSCH, with HARQ operation when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.
The following information is sent by means of SCI format 2-B:
number of HARQ processes-4 bits
-new data indicator-1 bit
Redundancy version-2 bits
Source ID-8 bits
Destination ID-16 bits
-HARQ feedback enable/disable indicator-1 bit
Zone ID-12 bits
Communication range requirement-4 bits determined by the higher layer parameter sl-ZoneConfigMCR-Index
Referring to (a) or (b) of fig. 6, the first UE may receive the PSFCH in step S630. For example, the first UE and the second UE may determine PSFCH resources, and the second UE may send HARQ feedback to the first UE using the PSFCH resources.
Referring to fig. 6 (a), in step S640, the first UE may transmit SL HARQ feedback to the base station through PUCCH and/or PUSCH.
Fig. 7 illustrates three broadcast types, according to an embodiment of the present disclosure. The embodiment of fig. 7 may be combined with various embodiments of the present disclosure. Specifically, (a) of fig. 7 shows broadcast-type SL communication, (b) of fig. 7 shows unicast-type SL communication, and (c) of fig. 7 shows multicast-type SL communication. In the case of unicast-type SL communication, a UE may perform one-to-one communication for another UE. In the case of multicast type SL transmission, the UE may perform SL communication for one or more UEs in a group to which the UE belongs. In various embodiments of the present disclosure, SL multicast communications may be replaced with SL multicast communications, SL one-to-many communications, and the like.
Hereinafter, a hybrid automatic repeat request (HARQ) process will be described.
For example, SL HARQ feedback may be enabled for unicast. In this case, in a non-code block group (non-CBG) operation, the receiving UE may decode the PSCCH targeted to the receiving UE, and when the receiving UE successfully decodes a transport block related to the PSCCH, the receiving UE may generate the HARQ-ACK. Thereafter, the receiving UE may transmit the HARQ-ACK to the transmitting UE. In contrast, after the receiving UE decodes the PSCCH targeted to the receiving UE, if the receiving UE fails to successfully decode a transport block associated with the PSCCH, the receiving UE may generate a HARQ-NACK and the receiving UE may transmit the HARQ-NACK to the transmitting UE.
For example, SL HARQ feedback may be enabled for multicast. For example, during non-CBG, two different types of HARQ feedback options may be supported for multicast.
(1) Multicast option 1: after decoding the PSCCH targeted to the receiving UE, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH if the receiving UE fails to decode a transport block associated with the PSCCH. In contrast, when the receiving UE decodes the PSCCH targeted to the receiving UE, and when the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE does not transmit the HARQ-ACK to the transmitting UE.
(2) Multicast option 2: after decoding the PSCCH targeted to the receiving UE, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH if the receiving UE fails to decode a transport block associated with the PSCCH. And, when the receiving UE decodes the PSCCH targeted to the receiving UE and when the receiving UE successfully decodes a transport block associated with the PSCCH, the receiving UE may transmit the HARQ-ACK to the transmitting UE via the PSFCH.
For example, if multicast option 1 is used in SL HARQ feedback, all UEs performing multicast communication may share PSFCH resources. For example, UEs belonging to the same group may transmit HARQ feedback by using the same PSFCH resource.
For example, if multicast option 2 is used in SL HARQ feedback, each UE performing multicast communication may use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group may transmit HARQ feedback by using different PSFCH resources.
In the present disclosure, HARQ-ACK may be referred to as ACK, ACK information, or positive ACK information, and HARQ-NACK may be referred to as NACK, NACK information, or negative ACK information.
Hereinafter, a UE procedure for reporting HARQ-ACK on a side link will be described.
The UE may be configured to receive a message from a plurality of N PSSCH subch SCI format indications of PSSCH reception are scheduled in one or more of the subchannels to transmit a PSFCH with HARQ-ACK information in response to the PSSCH reception. The UE provides HARQ-ACK information including ACK or NACK or only NACK.
The number of slots in the resource pool for the Period of the PSFCH transmission opportunity resource may be provided to the UE by the sl-PSFCH-Period-r 16. If the number is zero, PSFCH transmissions from the UE in the resource pool are disabled. If k mod N PSFCH PSSCH =0, then UE expects slot t' k SL (0≤k<T' max ) Having PSFCH transmission opportunity resources, where t' k SL Is a time slot belonging to a resource pool, T' max Is the number of slots belonging to the resource pool within 10240 milliseconds, and N PSFCH PSSCH Is provided by sl-PSFCH-Period-r 16. The UE may be instructed by higher layers not to transmit PSFCH in response to PSSCH reception. If the UE receives the PSSCH in the resource pool and the value of the HARQ feedback enable/disable indicator field in the associated SCI format 2-a or SCI format 2-B is 1, the UE provides HARQ-ACK information in the PSFCH transmission in the resource pool. The UE transmits the PSFCH in a first slot that includes the PSFCH resources and is at least a number of slots in the resource pool provided by the sl-MinTimeGapPSFCH-r16 after the last slot received by the PSSCH.
M in resource pool for PSFCH transmission in PRB providing resource pool for UE by sl-PSFCH-RB-Set-r16 PSFCH PRB,set A set of PRBs. For N for resource pool provided by sl-NumSubchannel subch The number of sub-channels is less than or equal to N PSFCH PSSCH The UE will come from M, the number of PSSCH slots associated with the PSFCH slot PRB,set PSFCH [ (i+j.N) in each PRB PSFCH PSSCH )·M PSFCH subch,slot ,(i+1+j·N PSFCH PSSCH )·M PSFCH subch,slot -1]Time slot i and subchannel j among PSSCH slots related to PSFCH time slot are allocated by PRBs, wherein M PSFCH subch,slot ＝M PSFCH PRB,set /(N subch ·N PSFCH PSSCH )，0≤i<N PSFCH PSSCH ,0≤j<N subch And the allocation starts in ascending order of i and continues in ascending order of j. UE expects M PSFCH PRB,set Is N subch ·N PSFCH PSSCH Is a multiple of (2).
The UE determines the number of PSFCH resources available for multiplexing HARQ-ACK information in PSFCH transmission as R based on the higher layer indication PSFCH PRB,CS ＝N PSFCH type ·M PSFCH subch,slot ·N PSFCH CS Wherein N is PSFCH CS Is the number of cyclic shift pairs for the resource pool,
-N PSFCH type =1 and M PSFCH subch,slot The PRBs are associated with the starting sub-channel of the corresponding PSSCH
-N PSFCH type ＝N PSSCH subch And N is PSSCH subch ·M PSFCH subch,slot Each PRB and N from corresponding PSSCH PSSCH subch One or more of the subchannels are correlated.
PSFCH resource first from N PSFCH type ·M PSFCH subch,slot The PRBs are indexed according to the ascending order of the PRB indexes and then are indexed from N PSFCH CS The cyclic shift pairs index an ascending order of indexes according to the cyclic shift.
The UE determines an index of PSFCH resources for PSFCH transmission in response to the PSSCH reception as (P ID +M ID )mod R PSFCH PRB,CS Wherein P is ID Is provided by SCI format 2-A or 2-B received by scheduling PSSCHAnd M ID Is the identity of the UE receiving the PSSCH indicated by the higher layer if the UE detects SCI format 2-a with a broadcast type indicator field value of "01"; otherwise, M ID Zero.
The UE uses table 8 from the cyclic shift pair index corresponding to the PSFCH resource index and from N PSFCH CS M for calculating the cyclic shift alpha value 0 Values.
TABLE 8
If the UE detects SCI format 2-A with a broadcast type indicator field value of "01" or "10", the UE determines m for calculating the cyclic shift alpha value as in Table 9 cs The value, or if the UE detects SCI format 2-B or SCI format 2-a with a broadcast type indicator field value of "11", the UE determines m for calculating the cyclic shift alpha value as in table 10 cs Values. The UE applies one cyclic shift from the cyclic shift pair to the sequence for PSFCH transmission.
TABLE 9
| HARQ-ACK values | 0(NACK) | 1(ACK) |
| Cyclic shift of sequences | 0 | 6 |
TABLE 10
| HARQ-ACK values | 0(NACK) | 1(ACK) |
| Cyclic shift of sequences | 0 | N/A |
Hereinafter, a procedure in which the UE reports the HARQ-ACK in the uplink will be described.
In order to report HARQ-ACK information generated by the UE based on HARQ-ACK information received by the UE from the PSFCH or obtained from no PSFCH reception, PUCCH resources or PUSCH resources may be provided to the UE. The UE reports HARQ-ACK information of a primary cell in which the UE monitors the PDCCH to detect a PUCCH group among cells of the DCI format 3_0.
For type 1 or type 2SL configuration grant PSSCH transmissions by the UE during the period provided by the SL-periodic g, the UE generates HARQ-ACK information in response to PSFCH reception to facilitate multiplexing during PUCCH transmission occasions after the last time resource in the set of time resources.
For each PSFCH receiver opportunity among the PSFCH receiver opportunities, the UE generates HARQ-ACK information to be reported during PUCCH or PUSCH transmission. The UE may be instructed in SCI format to do one of the following steps and if applicable, configure the HARQ-ACK codeword using the HARQ-ACK information. Here, the UE performs one of the following steps:
If the UE receives a PSFCH associated with SCI format 2-a with a broadcast type indicator field value of "10",
the UE generates HARQ-ACK information having the same value as the HARQ-ACK information value determined when the UE receives the PSFCH within the PSFCH reception opportunity, and generates a NACK if it is determined that the PSFCH is not received within the PSFCH reception opportunity.
If the UE receives a PSFCH associated with SCI format 2-a with a broadcast type indicator field value of "01",
all ID M at the same UE as the one desiring to receive PSSCH ID Among the corresponding PSFCH resources, the UE generates an ACK when determining an ACK among at least one of the plurality of PSFCH reception opportunities; otherwise, the UE generates a NACK.
If the UE receives a PSFCH associated with SCI format 2-B or SCI format 2-a with a broadcast type indicator field value of "11",
-the UE generating an ACK when it determines that there is no PSFCH reception for each of the PSFCH reception opportunities; otherwise, the UE generates a NACK.
After the UE transmits the PSSCH and receives the PSFCH in response to the PSFCH resource opportunity, the priority value of the HARQ-ACK information is the same as the priority value of the PSSCH transmission associated with the PSFCH receiver opportunity providing the HARQ-ACK information.
When PSFCH is not received at any PSFCH receiver related to PSSCH transmission within the resources provided by DCI format 3_0 including CRC scrambled by SL-RNTI due to prioritization, or if the UE is provided with PUCCH resources for reporting HARQ-ACK information within the resources provided within a single period for configuration grant, the UE generates NACK. The priority value of NACK is the same as that of PSSCH that is not transmitted due to prioritization.
If the UE does not transmit the PSCCH including SCI format 1-a for scheduling the pscsch among any resources provided by the configuration grant within a single period and the UE is provided with PUCCH resources for reporting HARQ-ACK information, the UE generates an ACK. The priority value of the ACK is equal to the largest priority value among the possible priority values for the configuration grant.
For reporting earlier than (n+1), (2048+144) ×κ×2 after the end of the last symbol of the last PSFCH receiver opportunity μ *T c Beginning HARQ-ACK information, UE does notIt is desirable to be provided with PUCCH resources or PUSCH resources among several PSFCH receiver opportunities in which the UE generates HARQ-ACK information reported during PUCCH or PUSCH transmission.
-μ＝min(μ SL ,μ UL ) Wherein μ is SL Is SCS setting of SL BWP, and μ UL Is the SCS setting of the active UL BWP of the primary cell.
N is determined from μ according to Table 11.
TABLE 11
| μ | N |
| 0 | 14 |
| 1 | 18 |
| 2 | 28 |
| 3t | 32 |
For the number of PSFCH receiver opportunities related to PUCCH transmission and ending with n slots, the UE provides HARQ-ACK information generated during PUCCH transmission within n+k slots according to the overlap condition. Here, k is the number of slots indicated by a PSFCH-to-HARQ feedback timing indicator field (if present) among DCI formats indicating slots related to PUCCH transmission for reporting HARQ-ACK information, or here, k may be provided by sl-PSFH-toppucch-CG-Type 1-r 16. Assuming that the start of the side link frame is the same as the start of the downlink frame, k=0 corresponds to the last slot for PUCCH transmission overlapping with the last PSFCH receiver.
In the case of PSSCH transmission by a UE scheduled by a DCI format or in the case of type 2PSSCH transmission of a SL configuration grant activated by the DCI format, the PUCCH resource indicator field is 0 in the DCI format, and when the value of the PSFCH-to-HARQ feedback timing indicator field (if present) is 0, it indicates to the UE that PUCCH resources are not provided. Regarding transmission of the Type 1PSSCH of the SL configuration grant, PUCCH resources may be provided by the SL-N1PUCCH-AN-r16 and the SL-PSFH-ToPUCCH-CG-Type1-r 16. If the PUCCH resource is not provided, the UE does not transmit a PUCCH including HARQ-ACK information generated from among the plurality of PSFCH receiver opportunities.
In case that the PUCCH transmission includes HARQ-ACK information, the UE determines a PUCCH resource set for HARQ-ACK information bits and then determines PUCCH resources. The PUCCH resource determination has a PSFCH-to-HARQ feedback timing indicator field value indicating the same slot used for PUCCH transmission, which the UE detects and is based on the PUCCH resource indicator field of the last DCI format 3_0 among DCI formats 3_0 related to transmitting corresponding HARQ-ACK information in the PUCCH, wherein the DCI formats for PUCCH resource determination detected by the UE are indexed in ascending order on the PDCCH monitoring occasion index.
The UE does not want to multiplex HARQ-ACK information regarding one or more SL configuration grants between the same PUCCHs.
The priority value of a PUCCH transmission comprising one or more side link HARQ-ACK information bits is the minimum priority value for one or more HARQ-ACK information bits. Hereinafter, the CRC of the DCI format 3_0 is scrambled as SL-RNTI or SL-CS-RNTI.
Fig. 8 illustrates a diagram describing a problem in a method for performing a DRX operation according to an embodiment of the present disclosure. Fig. 8 may be combined with various embodiments of the present disclosure.
Referring to fig. 8, in the case of multicast type SL communication, for example, a TX UE may perform SL communication using one or more RX UEs (e.g., RX UE 1, RX UE 2) within a group (e.g., group 1) to which the TX UE belongs, in accordance with an embodiment of the present disclosure. The RX UE may perform SL DRX operation based on the SL DRX configuration. For example, the SL DRX configuration of the RX UE may include at least one of an SL DRX activation time, an SL DRX cycle, an SL DRX on duration timer, an SL DRX start offset, and an SL DRX slot offset. For example, at least one of the SL DRX cycle, the length of the SL DRX cycle, the SL DRX start offset, and the SL DRX slot offset of RX UE 1 and RX UE 2 may be equally applied. For example, the SL DRX slot offset of the RX UE may be configured based on an L2 destination Identification (ID). For example, the SL DRX start offset of the RX UE may be configured based on the L2 destination ID.
For example, the QoS requirements of the first side link data received by RX UE 1 may be different from the QoS requirements of the second side link data received by RX UE 2. For example, the PQI value associated with the first side link data may be equal to 59 and the PQI value associated with the second side link data may be equal to 91. The priority of the first side link data may be lower than the priority of the second side link data (e.g., the priority value may be greater). For example, the Packet Delay Budget (PDB) value of the first side link data may be longer than the PDB value of the second side link data. For example, the starting point of the SL DRX activation time (e.g., the SL DRX on duration timer) of RX UE 2 may be equally configured as the starting point of the SL DRX activation time (e.g., the SL DRX on duration timer) of RX UE 1 (which has the same L2 destination ID as that of RX UE 2). For example, when the PDB value of the first side link data is equal to 100ms and the PDB value of the second side link data is equal to 50ms, the starting point of the on-duration timer for each of the RX UE 1 and the RX UE 2 may be the same. Thus, in multicast/broadcast, the starting point of the SL DRX on duration timer of the user equipment may not be dispersed in the time domain of each service. Meanwhile, in multicast/broadcast, qoS requirements of side link data may not be satisfied.
Fig. 9 shows a diagram describing a method for performing a DRX operation by a User Equipment (UE) according to an embodiment of the present disclosure. Fig. 9 may be combined with various embodiments of the present disclosure.
Referring to fig. 9, in the case of multicast type SL communication, for example, a TX UE may perform SL communication using one or more RX UEs (e.g., RX UE 1, RX UE 2) within a group (e.g., group 1) to which the TX UE belongs, in accordance with an embodiment of the present disclosure. The RX UE may perform SL DRX operation based on the SL DRX configuration. For example, the SL DRX configuration of the RX UE may include at least one of an SL DRX activation time, an SL DRX cycle, an SL DRX on duration timer, an SL DRX start offset, and an SL DRX slot offset. For example, at least one of the SL DRX cycle, the length of the SL DRX cycle, the SL DRX start offset, and the SL DRX slot offset may be applied based on a quality of service (QoS) of the side link data received by each of the RX UE 1 and the RX UE 2.
For example, the QoS requirements of the first side link data received by RX UE 1 may be different from the QoS requirements of the second side link data received by RX UE 2. For example, the PQI value associated with the first side link data may be equal to 59 and the PQI value associated with the second side link data may be equal to 91. The priority of the first side link data may be lower than the priority of the second side link data (e.g., the priority value may be greater). For example, the Packet Delay Budget (PDB) value of the first side link data may be longer than the PDB value of the second side link data. For example, based on different QoS, the starting point of the SL DRX activation time (e.g., the SL DRX on duration timer) of RX UE 2 may be configured to be different from the starting point of the SL DRX activation time (e.g., the SL DRX on duration) of RX UE 1 (which has the same L2 destination ID as the L2 destination ID of RX UE 2). For example, when the PDB value of the first side link data is equal to 100ms and the PDB value of the second side link data is equal to 50ms, the SL DRX slot offset informing the start point of the on-duration timer of RX UE 1 may be longer than the SL DRX slot offset informing the start point of the on-duration timer of RX UE 2 (e.g., the start point of the on-duration timer of RX UE 1 may be a point of time later than the start point of the on-duration timer of RX UE 2).
Thus, according to embodiments of the present disclosure, qoS requirements for each side link data of a plurality of UEs may be satisfied, for example, in multicast/broadcast. For example, in multicast/broadcast, the starting points of the SL DRX on duration timers for multiple UEs may be dispersed in the time domain according to embodiments of the present disclosure. For example, in multicast/broadcast according to an embodiment of the present disclosure, qoS requirements of transmitted side link data can be satisfied for all of a plurality of UEs for each service by having the starting point of the SL DRX on duration timer for each service dispersed in the time domain.
The SL DRX configuration referred to in this disclosure may include at least one or more of the following information.
For example, the SL DRX configuration may include one or more of the information listed below.
(1) For example, the SL DRX-onduration timer may be information about the duration at the beginning of the DRX cycle. For example, the start period of the DRX cycle may be information about a period during which the terminal operates in an active mode to transmit or receive side link data.
(2) For example, the SL DRX-SlotOffset may be information about a delay before DRX-onduration timer starts of the DRX on duration timer.
(3) For example, the SL drx-incaactytimer may be information about the duration after the PSCCH occasion, where PSCCH indicates new side link transmission and reception for the MAC entity. For example, when the transmitting terminal instructs PSSCH transmission through the PSCCH, the transmitting terminal operates in an active mode while the SL drx-incaactytimer is running so that the transmitting terminal can transmit the PSSCH to the receiving terminal. Further, for example, when the receiving terminal is instructed to transmit the PSSCH through the PSCCH reception, the receiving terminal operates in an active mode while the SL drx-incaactytimer is running so that the receiving terminal can receive the PSSCH from the transmitting terminal.
(4) For example, SL drx-retransmission timer may be information about the maximum duration until a retransmission is received. For example, SL drx-retransmission timer may be configured per HARQ process.
(5) For example, the SL drx-HARQ-RTT-Timer may be information about the minimum duration before the assignment for HARQ retransmissions is expected by the MAC entity. For example, the SL drx-HARQ-RTT-Timer may be configured per HARQ process.
(6) For example, SL DRX-longcycletaffset may be information about a long DRX cycle and DRX-StartOffset defining a long DRX cycle and a subframe where the short DRX cycle starts.
(7) For example, the SL DRX-short cycle may be information about a short DRX cycle. For example, SL drx-ShortCycle may be optional information.
(8) For example, the SL DRX-ShortCycleTimer may be information about the duration that the UE should follow a short DRX cycle. For example, SL drx-ShortCycleTimer may be optional information.
(9) For example, SL DRX-StartOffset may be information about a subframe at which the SL DRX cycle starts.
(10) For example, SL DRX-Cycle may be information about SL DRX Cycle.
The following SL DRX timers mentioned in this disclosure may be used for the following purposes.
(1) SL DRX on duration timer: the UE performing the SL DRX operation should basically operate in an active time to receive a period of PSCCH/PSSCH of the counterpart UE.
(2) SL DRX inactivity timer: the UE performing the SL DRX operation extends a period of an SL DRX on duration period, which is a period of active time basically required for receiving the PSCCH/PSSCH of the counterpart UE.
For example, the UE may extend the SL DRX on duration timer by an SL DRX inactivity timer period. Further, when the UE receives a new packet (e.g., a new PSSCH transmission) from the counterpart UE, the UE may start the SL DRX inactivity timer to extend the SL DRX on duration timer.
For example, the SL DRX inactivity timer may be used to extend the SL DRX duration timer period, which is the period in which an RX UE performing SL DRX operation should operate substantially as an active time to receive the PSCCH/pscsch of another TX UE. That is, the SL DRX on duration timer may extend the SL DRX inactivity timer period. In addition, when the RX UE receives a new packet (e.g., a new PSSCH transmission) from the corresponding TX UE, the RX UE may start the SL DRX inactivity timer to extend the SL DRX on duration timer.
(3) SL DRX HARQ RTT timer: the UE performing the SL DRX operation operates in the sleep mode until a period in which it receives a retransmission packet (or PSSCH assignment) transmitted by the counterpart UE.
For example, when the UE starts the SL DRX HARQ RTT timer, the UE may determine that the counterpart UE will not retransmit the packet to its transmission side link until the SL DRX HARQ RTT timer expires, and may operate in a sleep mode while the corresponding timer is running. For example, when the UE starts the SL DRX HARQ RTT timer, the UE may not monitor a side link retransmission packet from the counterpart UE until the SL DRX HARQ RTT timer expires. For example, the RX UE may start the SL DRX HARQ RTT timer when the RX UE transmission SL HARQ NACK feedback of the PSCCH/PSSCH transmitted by the TX UE has been received. In this case, the RX UE may determine that the counterpart TX UE will not retransmit the packet to its transmit side link until the SL DRX HARQ RTT timer expires, and may operate in sleep mode while the corresponding timer is running.
(4) SL DRX retransmission timer: a timer started when the SL DRX HARQ RTT timer expires, and a period during which a UE performing the SL DRX operation operates to receive a retransmission packet (or PSSCH assignment) transmitted by the counterpart UE, such as an active time.
For example, during a corresponding timer period, the UE may receive or monitor retransmission side-chain packets (or PSSCH assignments) sent by the counterpart UE. For example, while the SL DRX retransmission timer is running, the RX UE may receive or monitor retransmission side-chain packets (or PSSCH assignments) sent by the corresponding TX UE.
The following Uu DRX timers mentioned in this disclosure may be used for the following purposes.
(1)Uu DRX HARQ RTT TimerSL
For example, uu DRX HARQ RTT TimerSL may be used in a period in which a UE performing Uu DRX operation does not need to monitor DCI (PDCCH) transmitted by a base station for SL mode 1 operation. That is, while Uu DRX HARQ RTT TimerSL is running, the UE may not need to monitor PDCCH for SL mode 1 operation. That is, uu DRX HARQ RTT TimerSL may mean the minimum duration before an SL retransmission grant is desired.
(2)Uu DRX Retransmission TimerSL
For example, it may be used in a period in which a UE performing Uu DRX operation monitors DCI (PDCCH) for SL mode 1 operation transmitted by a base station. That is, the UE may monitor the PDCCH transmitted by the base station for SL mode 1 operation while Uu DRX retransmission timer SL is running. That is, uu DRX retransmission timer SL may mean the maximum duration until a SL retransmission grant is received.
Fig. 10 shows a diagram describing a procedure for performing a DRX operation according to an embodiment of the present disclosure. Fig. 10 may be combined with various embodiments of the present disclosure.
Referring to fig. 10, for example, in step S1010, a TX UE and/or an RX UE may determine quality of service (QoS) for multicast communication and/or broadcast communication. For example, in step S1020, the TX UE and/or the RX UE may acquire a SL DRX configuration including information related to the SL DRX slot offset. SL DRX slot offset may be configured based on QoS. For example, a SL DRX configuration including a SL DRX slot offset may be configured based on QoS. For example, in step S1030, the RX UE may initiate/trigger the SL DRX cycle of the RX UE at the point in time notified by the SL DRX start offset. For example, in step S1040, the RX UE may start/trigger the SL DRX on duration timer of the RX UE at the point in time notified by the SL DRX slot offset. For example, in step S1050, the TX UE may transmit the first SCI for scheduling the second SCI and the PSSCH to the RX UE over the PSCCH. For example, in step S1060, the TX UE may transmit the second SCI and MAC PDU to the RX UE through the PSSCH.
Meanwhile, power saving operation of a UE, e.g., a pedestrian UE (P-UE), may be supported since release 17nr v2 x. For example, a side link DRX configuration may be defined for power saving operation of the UE (e.g., side link Discontinuous Reception (DRX) operation).
Thus, in embodiments of the present disclosure, a side link DRX configuration (e.g., side link DRX cycle, side link DRX on duration timer) for power saving operation of the UE may be defined, and when the UE performs side link DRX operation, an offset (e.g., start offset) of the side link DRX cycle and/or an offset (e.g., side link DRX start offset) of the side link DRX on duration timer may be determined.
According to embodiments of the present disclosure, the side link DRX slot offset (SL DRX-SlotOffset) may be configured by reflecting the QoS of the side link data (e.g., quality of service (QoS) profile/PC 5 5G QoS identifier (5 QI) (PQI)/Packet Delay Budget (PDB), etc.).
According to embodiments of the present disclosure, for example, "per QoS profile (e.g., PC5 5G QoS identifier (5 QI) (PQI), packet Delay Budget (PDB), etc.)" configures SL DRX cycles of a side-link DRX configuration used in the same multicast/broadcast. For example, the SL DRX cycle (e.g., length of the SL DRX cycle) may be configured so as to be able to meet QoS requirements for side link data of a multicast/broadcast service. Additionally, among the various parameters of the SL DRX configuration, there may be a side link DRX slot offset (SL DRX-SlotOffset) indicating the starting point of the side link DRX on duration timer. In embodiments of the present disclosure, the side link DRX slot offset (SL DRX-SlotOffset) may be configured by reflecting the QoS of the side link data (e.g., quality of service (QoS) profile/PC 5 5G QoS identifier (5 QI) (PQI)/Packet Delay Budget (PDB), etc.).
According to embodiments of the present disclosure, for example, when a Side Link (SL) DRX cycle starts (e.g., the side link DRX cycle may start at a point indicated by a side link DRX start offset (sldrx-startoffset)), a SL DRX on duration timer may start at a point in time indicated by a side link DRX slot offset (SL DRX-SlotOffset). For example, the SL DRX on duration timer may start early or may start late within the SL DRX cycle depending on the value of the side link DRX start offset (SL DRX-startoffset). If the side link DRX slot offset (SL DRX-SlotOffset) is configured based on the layer 2 (L2) destination ID, just like the side link DRX start offset (SL DRX-startoffset), the QoS requirements of the side link data may not be reflected. For example, if a side link DRX slot offset (SL DRX-SlotOffset) is applied, the SL DRX on duration timer may be configured to start late within the SL DRX cycle (the side link DRX slot offset (SL DRX-SlotOffset) may be configured to have a large value so that the SL DRX on duration timer can start late). Thus, situations may arise in which the QoS requirements of the side link data (e.g., qoS profile, PQI, packet Delay Budget (PDB)) are not met. Thus, in embodiments of the present disclosure, the starting point of the side link DRX on duration timer may be configured by reflecting the QoS of the side link data (e.g., qoS profile/PQI/PDB, etc.), for example, a side link DRX slot offset (SL DRX-SlotOffset) indicating the starting point of the side link DRX on duration timer may be configured per PQI, and the starting point of the on duration timer for SL DRX may be dispersed. For example, each PQI of the PQI table shown in Table 12 below may be configured with a different side link DRX slot offset (SL DRX-SlotOffset). For example, in the PQI table of table 12, since the PQI value "91" has the shortest PDB value (or, for example, the PQI having the lowest priority value, for example, the PQI having the highest priority) among the side link DRX slot offsets (SL DRX-slotoffsets) configured per PQI, the shortest value may be set as the side link DRX slot offset (SL DRX-SlotOffset) (for example, the side link DRX slot offset (SL DRX-SlotOffset) mapped to the PQI value having the shortest PDB value may be configured to have the shortest offset value when it is assumed that the same SL DRX cycle is being applied. In contrast, for example, since the PQI value "59" has the longest PDB value (or, for example, the PQI having the highest priority value, for example, the PQI having the lowest priority) among the side link DRX slot offsets (SL DRX-slotoffsets) configured per PQI, the longest value may be set as the side link DRX slot offset (SL DRX-SlotOffset) (for example, the side link DRX slot offset (SL DRX-SlotOffset) mapped to the PQI value having the longest PDB value may be configured as the longest offset value when it is assumed that the same SL DRX cycle is being applied). By embodiments of the present disclosure, in multicast/broadcast, the starting point of the SL DRX on duration timer of the UE may be dispersed in the time domain of each service. In addition, by the embodiment of the invention, the side link DRX time slot offset (sl DRX-SlotOffset) can be applied so as to meet the QoS requirement of the side link data.
TABLE 12
In embodiments of the present disclosure, for example, a side link DRX start offset (SL DRX-StartOffset) indicating a start point of a side link DRX cycle and/or a side link DRX slot offset (SL DRX-SlotOffset) indicating a start point of a side link DRX on duration timer for multicast/broadcast configuration may each be configured by a partial bit (e.g., 12 bits of a Least Significant Bit (LSB), 12 bits of a Most Significant Bit (MSB)) reflecting a 24-bit L2 destination ID. For example, a side link DRX start offset (SL DRX-StartOffset) indicating a start point of the side link DRX cycle may be configured based on layer 2 (L2) destination ID per 12 bits MSB (most significant bit) (or LSB (least significant bit)) such as side link DRX start offset (SL DRX-StartOffset) =sl DRX cycle modulo "12 (or N) bits MSB (or LSB) L2 destination ID" or side link DRX start offset (SL DRX-StartOffset) = "12 (or N) bits MSB (or LSB) L2 destination ID" modulo the SL DRX cycle. Additionally, for example, a side link DRX slot offset (SL DRX-SlotOffset) indicating the starting point of the side link DRX on duration timer may be configured based on each 12 bit LSB (least significant bit) (or MSB (most significant bit)) L2 destination ID (e.g., side link DRX slot offset (SL DRX-SlotOffset) =side link DRX on duration timer (SL DRX on duration timer)) modulo "12 (or N) bits LSB (or MSB) L2 destination ID", or, for example, side link DRX slot offset (SL DRX-SlotOffset) = "12 (or N) bits LSB (or MSB) L2 destination ID" modulo side link DRX on duration timer (SL DRX on duration timer)). In embodiments of the present disclosure, a side link DRX slot offset (SL DRX-SlotOffset) indicating a starting point of a side link DRX on duration timer for a side link DRX configuration of multicast/broadcast may be configured by reflecting a PC5 5G QoS identifier (5 QI) (PQI) index (e.g., an index per PQI, e.g., PQI index of PQI value 21 equals 1, PQI index of PQI value 22 equals 2, …, PQI index of PQI value 91 equals 10. The total number of PQI indexes may equal the total number of PQI values). For example, a side link DRX slot offset (sldrx-slotooffset) =side link DRX on duration timer (sldrx on-duration timer) modulo the PQI index or PQI index modulo the side link DRX on duration timer (sldrx on-duration timer).
Embodiments of the present disclosure may be a scheme that can be extendably applied to SL DRX configurations configured for side link unicast (e.g., side link DRX start offset (SL DRX-StartOffset), side link DRX slot offset (SL DRX-SlotOffset)).
Embodiments of the present disclosure may have various effects. For example, according to embodiments of the present disclosure, qoS requirements for side link data for multiple UEs may be met in multicast/broadcast. For example, in multicast/broadcast, the starting points of the SL DRX on duration timers for multiple UEs may be dispersed according to embodiments of the present disclosure. For example, in multicast/broadcast, the starting point of the SL DRX on duration timer for multiple UEs may be dispersed within the time domain of each service, according to embodiments of the present disclosure. For example, in multicast/broadcast according to an embodiment of the present disclosure, qoS requirements of transmitted side link data can be satisfied for all of a plurality of UEs per service by dispersing starting points of SL DRX on duration timers for each service.
In accordance with embodiments of the present disclosure, in NR uu DRX, DRX-slotooffset may be operated as follows.
In LTE Uu DRX, DRX-slotooffset may not be supported. For example, the UE may start the DRX cycle at a DRX-startoffset time point indicating the start of the DRX cycle, and may simultaneously start the DRX on duration timer.
In NR Uu DRX, DRX-slotooffset may be used as an offset indicating the starting point of the DRX on duration timer. For example, the UE may start the DRX cycle at a DRX-startoffset time point indicating the start of the DRX cycle, and the UE may start the DRX on duration timer from the start of the DRX cycle and after DRX-slotooffset.
Additionally, in NR Uu DRX, a wake-up signal (e.g., DCI format_2_6) may be introduced. For example, when the UE receives a wake-up signal from the base station, the UE may determine whether to skip the next DRX on duration or monitor the PDCCH of the base station in the next DRX on duration according to the content indicated in the wake-up signal (e.g., skip the next DRX on duration or monitor the PDCCH during the next DRX on duration timer).
The UE may wake up in advance at a time slot that leads as much as the power saving Offset (ps_offset) from the start point of the DRX on duration timer (e.g., the start point of the DRX on duration indicated by DRX-slotooffset), and then the UE may monitor the wake-up signal transmitted (or delivered) by the base station.
For example, in NR Uu DRX, the UE may newly define DRX-slotooffset to ensure that the UE can monitor the wake-up signal (e.g., DCI format_2_6) transmitted (or delivered) by the base station before the DRX on duration timer is started.
In embodiments of the present disclosure, in the side link DRX operation, an offset indicating a start point of a side link DRX slot offset (e.g., an offset indicating a start point of a side link DRX on duration timer) may operate as follows.
A) A method for configuring a side link DRX offset (sl-DRX-slotooffset) in side link unicast and a method of operation thereof.
In accordance with embodiments of the present disclosure, in DRX operation for side link unicast, each pair of unicast source layer 2 (L2) ID and unicast destination layer 2 (L2) ID (e.g., direction) configures a side link DRX configuration (e.g., SL DRX cycle, SL-DRX-startoffset, SL DRX on duration timer, SL-DRX-slotooffset, etc.). In the side-link unicast, since the side-link unicast link (e.g., or PC5 Radio Resource Control (RRC) connection) is managed for each pair of unicast source layer 2 (L2) ID and unicast destination layer 2 (L2) ID, the UE may apply one SL DRX configuration for each side-link unicast (e.g., or PC5 Radio Resource Control (RRC) connection) and may then perform SL DRX operation. Additionally, in side link DRX operation, the wake-up signal may not be supported, and in side link DRX operation, early wake-up prior to the SL DRX on duration timer may not be required. For example, a UE operating side link DRX may not need to wake up in advance before the on duration timer starts. Additionally, (because no operation to monitor wake-up signals is required), for example, the SL DRX on duration timer for each unicast link (e.g., either for each PC5 RRC connection or for each pair of unicast Source (SRT)/Destination (DST) L2 ID) may not need to be decentralized, as there is only one DRX configuration for each unicast link. Thus, in embodiments of the present invention, by configuring SL-DRX-slotoffset to "0" in SL unicast, the side link DRX on duration timer may be started at the same time as the start point of the side link DRX cycle (e.g., the point in time when the SL-DRX-startoffset is applied).
In embodiments of the present disclosure, the starting point of the sidelink DRX on duration timer may be dispersed as many as the number of sidelink unicast links (or PC5RRC connections) present in the same unicast source L2 ID/unicast destination L2 ID pair. For example, even in the same unicast source L2 ID/unicast destination L2 ID pair, the sl-DRX-sloffset may be configured differently (e.g., to a value of 0 or greater than or equal to 0) for each side link unicast link (or PC5RRC connection), and the starting point of the side link DRX on duration timer may be dispersed.
As an embodiment of the present disclosure, each pair of unicast source L2 ID and unicast destination L2 ID (e.g., direction) may configure SL-DRX-slotooffset for SL DRX configuration for side-link unicast. Alternatively, for example, each PC5 unicast link may be configured with SL-DRX-slotooffset for a SL DRX configuration for side link unicast. Alternatively, for example, each PC5RRC connection may configure the SL-DRX-slotooffset for a SL DRX configuration for side-link unicast.
B) Method for configuring drx-slotooffset in side link multicast/broadcast and method of operating the same
In embodiments of the present disclosure, in DRX operation for side link multicast/broadcast, based on (e.g., or representing) the side link multicast/broadcast service, each multicast/broadcast destination layer 2ID generated in the V2X layer, the side link DRX configuration (e.g., SL DRX cycle, SL-DRX-startoffset, SL DRX on duration timer, SL-DRX-slotooffset, etc.) may be configured. In side link multicast/broadcast, the UE may perform SL DRX operation by applying a SL DRX configuration satisfying each different QoS profile (e.g., PQI) through each multicast/broadcast destination L2 ID. Additionally, side link DRX operation may not support a wake-up signal and may not need to wake-up before the SL DRX on duration timer. For example, a UE operating side link DRX may not need to wake up in advance before the on duration timer starts (because there is no need to monitor the operation of the wake up signal). However, in multicast/broadcast, if UEs each belonging to a different multicast/broadcast service apply the same SL-DRX-slotooffset, multiple UEs may need to wake up in a side link DRX on duration, where the multiple UEs overlap in order to monitor the PSCCH/PSSCH of the TX UE and perform SL communication. Therefore, a collision problem or the like may occur. Thus, for example, in multicast/broadcast, to avoid overlapping side link DRX on durations for UEs each belonging to a different multicast/broadcast service as much as possible, UEs each belonging to a different multicast/broadcast service may each be allowed to apply a different sl-DRX-slotooffset.
As an embodiment of the present disclosure, each QoS profile (e.g., PQI, PFI) representing a side link multicast/broadcast service may be configured with a different sl-drx-slotooffset. Alternatively, for example, each QoS requirement (e.g., SL priority or Packet Delay Budget (PDB)) for a side link multicast/broadcast service may be configured with a different SL-drx-slotooffset.
As an embodiment of the present disclosure, each pair of source L2 ID and multicast/broadcast destination L2 ID may configure SL-DRX-slotooffset for SL DRX configuration of side link multicast/broadcast. The starting point of the on duration timer may be dispersed for each pair of source L2 ID and multicast/broadcast destination L2 ID. Alternatively, for example, the SL-DRX-slotooffset of the SL DRX configuration for side link multicast/broadcast may be configured per QoS profile (e.g., or PQI, PFI), and the starting point of the on-duration timer may be dispersed per QoS profile (e.g., or PQI, PFI). Alternatively, for example, each side link priority (e.g., SL priority mapped to QoS/PQI) may configure the SL-DRX-slotooffset of the SL DRX configuration for side link multicast/broadcast, and the starting point of the on duration timer may be dispersed for each side link priority (e.g., SL priority mapped to QoS/PQI).
According to embodiments of the present disclosure, SL-DRX-slotooffset of SL DRX configuration for side link multicast/broadcast may be configured based on a value derived from a modulo operation (module) performed on a PC5 5G QoS identifier (5 QI) (PQI)/PC 5 QoS flow identifier (PFI)/SL priority value. For example, the starting point of the multicast/broadcast SL DRX on duration timer may be decentralized.
As an embodiment of the present disclosure, an operation of enabling a TX UE to configure an SL DRX configuration of an RX UE and delivering (or transmitting) the configuration of the RX UE may be supported. In SL DRX, if the TX UE configures a sidelink unicast connection/link (e.g., or a PC5 RRC connection) with the RX UE, the TX UE may configure SL-DRX-slotooffset to "0" and may transmit SL-DRX-slotooffset to the RX UE in the SL DRX configuration used in unicast, according to embodiments of the present disclosure. Also, in the case where the UE (TX UE or RX UE) applies SL DRX to side link multicast/broadcast communications, the UE may configure the SL-DRX-slotooffset value to be equal to "0" or more (e.g., or a non-zero (non-0) value) and may use the SL-DRX-slotooffset (e.g., may allow the SL-DRX-slotooffset to be used). For example, in SL DRX for multicast/broadcast communications, a UE may deliver (or transmit) a side link DRX configuration (e.g., SL-DRX-slotooffset) configured by a TX UE (or RX UE) to its corresponding UE (RX UE or TX UE). Alternatively, for example, the UE may deliver (or transmit) a side link DRX configuration (e.g., sl-DRX-slotooffset) configured by the UE to a UE (RX UE or TX UE) that is within the coverage of the base station and with which the base station performs multicast/broadcast communication.
In the present disclosure, names of timers (side link DRX on duration timer, side link DRX inactivity timer, side link DRX HARQ RTT timer, side link DRX retransmission timer, uu DRX HARQ RTT TimerSL, uu DRX retransmission timer sl, etc.) are exemplary, and timers performing the same/similar functions based on what is described in each timer can be regarded as the same/similar timers regardless of their names.
In addition to parameters (e.g., timers) included in the default/common SL DRX configuration, the default/common SL DRX pattern, or the default/common SL DRX configuration, the proposals of the present disclosure may be extended and applied to parameters (e.g., timers) included in the UE-to-specific SL DRX configuration, the UE-to-specific SL DRX pattern, or the UE-to-specific SL DRX configuration.
In addition, the on-duration referred to in the proposal of the present disclosure may be extended and interpreted as an active period (e.g., a time for an awake state (e.g., RF module on) to receive/transmit a radio signal), and the off-duration may be extended and interpreted as a sleep time (e.g., a time for operating in a sleep mode state (e.g., RF module off) to save power). This does not mean that the TX UE must operate in sleep mode at sleep time intervals. If necessary, the TX UE may be allowed to operate for a period of time in the active time for a sensing operation and/or a transmitting operation even during the sleep time.
For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g., thresholds) may be specifically (or differently or independently) configured for the resource pool. For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g. thresholds) may be specifically (or differently or independently) configured for congestion levels. For example, whether to apply (part of) the proposed method/rule of the present disclosure and/or related parameters (e.g. thresholds) may be specifically (or differently or independently) configured for the priority of the service. For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g., thresholds) may be specifically (or differently or independently) configured for the type of service. For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g., thresholds) may be specifically (or differently or independently) configured for QoS requirements (e.g., latency, reliability). For example, whether to apply (part of) the proposed method/rule of the present disclosure and/or related parameters (e.g. thresholds) may be specifically (or differently or independently) configured for PQI (5 QI (5G QoS identifier) for PC 5). For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g., thresholds) may be specifically (or differently or independently) configured for a traffic type (e.g., periodically generated or aperiodically generated). For example, whether to apply (part of) the proposed methods/rules of the present disclosure and/or related parameters (e.g., thresholds) may be specifically (or differently or independently) configured for SL transmission resource allocation modes (e.g., mode 1 or mode 2).
For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the resource pool. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the type of service/packet. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for priority of services/packets. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for QoS requirements (e.g., ulllc/EMBB traffic, reliability, latency). For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for PQI. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the type of transmission (e.g., unicast, multicast, broadcast). For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for (resource pool) congestion levels (e.g., CBR). For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for SL HARQ feedback schemes (e.g., NACK feedback only, ACK/NACK feedback). For example, whether to apply the proposed rules of the present disclosure and/or related parameter settings may be specifically (or differently or independently) configured for HARQ feedback enabled MAC PDU transmission. For example, whether to apply the rules and/or related parameter settings set forth in the present disclosure may be specifically (or differently or independently) configured for disabling MAC PDU transmission for HARQ feedback. For example, whether the proposed rules and/or related parameter settings of the present disclosure are applied may be specifically (or differently or independently) configured for whether PUCCH-based SL HARQ feedback reporting operation is set. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for reselection or preemption of preemptive-based resources. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for re-evaluation or re-selection of resources based on re-evaluation.
For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the (L2 or L1) (source and/or destination) identifier. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the (L2 or L1) (combination of source ID and destination ID) identifier. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for (L2 or L1) (a combination of source and destination ID pairs and broadcast type) identifiers. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the direction of a pair of source and destination layer IDs. For example, whether to apply the rules and/or related parameter settings set forth in the present disclosure may be specifically (or differently or independently) configured for the PC5 RRC connection/link. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the case of performing SL DRX. For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for a SL mode type (e.g., resource allocation mode 1 or resource allocation mode 2). For example, whether to apply the proposed rules and/or related parameter settings of the present disclosure may be specifically (or differently or independently) configured for the case where periodic (non-periodic) resource reservation is performed.
The specific time referred to in the proposal of the present disclosure may refer to a time during which the UE operates within a predefined time as an active time in order to receive a side link signal or side link data from the counterpart UE. The specific time referred to in the proposal of the present disclosure may refer to a time during which the UE operates within a specific timer (e.g., a side link DRX retransmission timer, a side link DRX inactivity timer, or a timer guaranteed to operate as an active time in the DRX operation of the RX UE) as an active time in order to receive a side link signal or side link data from the counterpart UE. Furthermore, whether to apply the proposal and proposal rules (and/or related parameter settings) of the present disclosure may also be applied to millimeter wave SL operation.
Fig. 11 illustrates a method for a first device to perform wireless communication according to an embodiment of the present disclosure. Fig. 11 may be combined with various embodiments of the present disclosure.
Referring to fig. 11, in step S1110, a first apparatus may acquire a lateral link (SL) Discontinuous Reception (DRX) configuration including information related to a DRX slot offset and information related to a SL DRX timer. In step S1120, the first device may start a SL DRX timer. In step S1130, the first device may receive first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from the second device through a physical side link control channel (PSCCH). In step S1140, the first device may receive a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) from the second device through the PSSCH. For example, the second SCI and SL DRX configuration may be related to a multicast type or a broadcast type, and the SL DRX slot offset may be configured based on information related to quality of service (QoS).
Additionally or alternatively, the SL DRX timer may be started from a point in time notified by information related to the SL DRX slot offset.
Additionally or alternatively, the SL DRX timer may include an SL DRX on duration timer.
Additionally or alternatively, the SL DRX configuration may further include information related to the SL DRX cycle.
Additionally or alternatively, the SL DRX cycle may be configured based on QoS related information.
Additionally or alternatively, the SL DRX configuration may further include information related to the SL DRX start offset.
Additionally or alternatively, the SL DRX cycle may start from a point in time that is notified by information related to the SL DRX start offset.
Additionally or alternatively, SL DRX operation may be initiated based on the initiated SL DRX cycle.
Additionally or alternatively, the SL DRX start offset may be configured based on a layer 2 (L2) destination ID.
Additionally or alternatively, the QoS may be a QoS for multicast or broadcast communications.
Additionally or alternatively, the first apparatus may determine QoS for multicast or broadcast communications.
Additionally or alternatively, SL DRX slot offset may be configured based on layer 2 (L2) destination ID and QoS related information.
Additionally or alternatively, the SL DRX slot offset may be configured based on the Most Significant Bit (MSB) of the layer 2 (L2) destination ID or the Least Significant Bit (LSB) of the layer 2 (L2) destination ID.
Additionally or alternatively, the QoS-related information may include a QoS profile associated with the QoS flow.
Additionally or alternatively, the QoS related information may include a PC5 5G QoS identifier (5 QI) (PQI) associated with the QoS flow.
Additionally or alternatively, the PQI may include at least one of a resource type, an average window, a maximum data burst amount, a Packet Delay Budget (PDB), a Packet Error Rate (PER), and a priority level.
Additionally or alternatively, the QoS related information may further include an index related to the PQI.
The proposed method may be applied to an apparatus according to various embodiments of the present disclosure. First, the processor 102 of the first apparatus 100 may acquire a Side Link (SL) Discontinuous Reception (DRX) configuration including information related to a SL DRX slot offset and information related to a SL DRX timer. And, the processor 102 of the first apparatus 100 may start the SL DRX timer. For example, the processor 102 of the first device 100 may control the transceiver 106 to receive first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from the second device over a physical side link control channel (PSCCH). For example, the processor 102 of the first device 100 may control the transceiver 106 to receive the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) from the second device via the PSSCH. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment of the present disclosure, a first apparatus for performing wireless communication may be provided. The first apparatus may include one or more memories to store instructions; one or more transceivers; and one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors are executable instructions to obtain a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer, and to start the SL DRX timer. For example, the one or more processors may execute instructions to receive, from a second device over a physical side link control channel (PSCCH), first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH). For example, the one or more processors can execute instructions to receive a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) from a second device via a PSSCH. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to embodiments of the present disclosure, an apparatus configured to control a first User Equipment (UE) may be provided. The apparatus may include: one or more processors; and one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors are executable by the instructions to obtain a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, one or more processors may execute instructions to start a SL DRX timer. For example, the one or more processors may execute instructions to receive, from a second UE over a physical side link control channel (PSCCH), first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH). For example, the one or more processors can execute instructions to receive a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) from a second UE over a PSSCH. For example, the one or more processors may execute instructions such that the second SCI and SL DRX configuration can be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment of the present disclosure, a non-transitory computer-readable medium having instructions recorded thereon may be provided. The instructions, when executed by the one or more processors, may cause the one or more processors to obtain, by the first apparatus, a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the instructions, when executed by the one or more processors, may cause the one or more processors to start a SL DRX timer via the first device. For example, the instructions, when executed by the one or more processors, may cause the one or more processors to receive, by the first device, first Sidelink Control Information (SCI) from the second device over a Physical Sidelink Control Channel (PSCCH) for scheduling the second SCI and a Physical Sidelink Shared Channel (PSSCH). For example, the instructions, when executed by the one or more processors, may cause the one or more processors to receive, by the first device, a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) from the second device via the PSSCH. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
Fig. 12 illustrates a method for a second device to perform wireless communication according to an embodiment of the present invention. Fig. 12 may be combined with various embodiments of the present disclosure.
Referring to fig. 12, in step S1210, the second apparatus may acquire a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. In step S1220, the second device may transmit first side link control information (SCI) for scheduling the second SCI and a physical side link shared channel (PSSCH) to the first device through a physical side link control channel (PSCCH). In step S1230, the second device may transmit a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device through the PSSCH. For example, a SL DRX timer may be started. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
The proposed method may be applied to an apparatus according to various embodiments of the present disclosure. First, the processor 202 of the second apparatus 200 may acquire a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the processor 202 of the second apparatus 200 may acquire synchronization based on a synchronization signal received from a synchronization reference. And, the processor 202 of the second apparatus 200 may control the transceiver 206 to transmit the first side link control information (SCI) for scheduling the second SCI and the physical side link shared channel (PSSCH) to the first apparatus through a physical side link control channel (PSCCH). For example, the processor 202 of the second device 200 may control the transceiver 206 to transmit the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device through the PSSCH. For example, a SL DRX timer may be started. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
Additionally or alternatively, the SL DRX timer may include an SL DRX on duration timer.
Additionally or alternatively, the SL DRX configuration may further include information related to the SL DRX cycle.
Additionally or alternatively, the SL DRX cycle may be configured based on QoS related information.
Additionally or alternatively, the SL DRX configuration may further include information related to the SL DRX start offset.
Additionally or alternatively, the SL DRX cycle may start from a point in time that is notified by information related to the SL DRX start offset.
Additionally or alternatively, SL DRX operation may be initiated based on the initiated SL DRX cycle.
Additionally or alternatively, the SL DRX start offset may be configured based on a layer 2 (L2) destination ID.
Additionally or alternatively, the QoS may be a QoS for multicast or broadcast communications.
Additionally or alternatively, the first apparatus may determine QoS for multicast or broadcast communications.
Additionally or alternatively, SL DRX slot offset may be configured based on layer 2 (L2) destination ID and QoS related information.
Additionally or alternatively, the SL DRX slot offset may be configured based on the Most Significant Bit (MSB) of the layer 2 (L2) destination ID or the Least Significant Bit (LSB) of the layer 2 (L2) destination ID.
Additionally or alternatively, the QoS-related information may include a QoS profile associated with the QoS flow.
Additionally or alternatively, the QoS related information may include a PC5 5G QoS identifier (5 QI) (PQI) associated with the QoS flow.
Additionally or alternatively, the PQI may include at least one of a resource type, an average window, a maximum data burst amount, a Packet Delay Budget (PDB), a Packet Error Rate (PER), and a priority level.
Additionally or alternatively, the QoS related information may further include an index related to the PQI.
According to an embodiment of the present disclosure, a second apparatus for performing wireless communication may be provided. The second apparatus may include: one or more memories storing instructions; one or more transceivers; and one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors are executable instructions to obtain a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute instructions to send first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to the first device over a physical side link control channel (PSCCH). For example, the one or more processors can execute instructions to send a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device via the PSSCH. For example, a SL DRX timer may be started. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment of the present disclosure, an apparatus configured to control a second User Equipment (UE) may be provided. The apparatus may include: one or more processors; and one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors are executable by the instructions to obtain a SL DRX configuration comprising information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the one or more processors may execute instructions to send first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first UE over a physical side link control channel (PSCCH). For example, the one or more processors can execute instructions to transmit a second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first UE via the PSSCH. For example, a SL DRX timer may be started. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
According to an embodiment of the present disclosure, a non-transitory computer-readable medium having instructions recorded thereon may be provided. The instructions, when executed by the one or more processors, may cause the one or more processors to obtain, by the second apparatus, a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer. For example, the instructions, when executed by the one or more processors, may cause the one or more processors to transmit, by the second device, first Sidelink Control Information (SCI) for scheduling the second SCI and a Physical Sidelink Shared Channel (PSSCH) to the first device over a Physical Sidelink Control Channel (PSCCH). For example, the instructions, when executed by the one or more processors, may cause the one or more processors to transmit, by the second device, the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device via the PSSCH. For example, a SL DRX timer may be started. For example, the second SCI and SL DRX configurations may be related to a multicast type or a broadcast type. For example, the SL DRX slot offset may be configured based on information related to quality of service (QoS).
The various embodiments of the present disclosure may be combined with each other.
Hereinafter, an apparatus to which the respective embodiments of the present disclosure may be applied will be described.
The various descriptions, functions, procedures, suggestions, methods and/or operational flows of the present disclosure described in this document may be applied to, but are not limited to, various fields requiring wireless communication/connection (e.g., 5G) between devices.
Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following figures/description, like reference numerals may refer to like or corresponding hardware, software, or functional blocks unless otherwise specified.
Fig. 13 shows a communication system (1) according to an embodiment of the present disclosure. The embodiment of fig. 13 may be combined with various embodiments of the present disclosure.
Referring to fig. 13, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a Base Station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a Radio Access Technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication/radio/5G device. Wireless devices may include, but are not limited to, robots (100 a), vehicles (100 b-1, 100 b-2), augmented reality (XR) devices (100 c), handheld devices (100 d), home appliances (100 e), internet of things (IoT) devices (100 f), and Artificial Intelligence (AI) devices/servers (400). For example, the vehicles may include vehicles having wireless communication functions, autonomous vehicles, and vehicles capable of performing inter-vehicle communication. Herein, a vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., an unmanned aerial vehicle). XR devices may include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices and may be implemented in the form of head-mounted devices (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, and the like. Handheld devices may include smartphones, smartpads, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network may be implemented as wireless devices, and a particular wireless device (200 a) may operate as a BS/network node relative to other wireless devices.
Here, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include a narrowband internet of things for low power communication in addition to LTE, NR, and 6G. In this case, for example, the NB-IoT technology may be an example of Low Power Wide Area Network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and/or LTE Cat NB2, not limited to the names described above. Additionally or alternatively, wireless communication techniques implemented in the wireless devices 100 a-100 f of the present disclosure may perform communications based on LTE-M techniques. In this case, as an example, the LTE-M technology may be an example of an LPWAN, and may be referred to as various names including enhanced machine type communication (eMTC), and the like. For example, LTE-M technology may be implemented as at least any of various standards such as, but not limited to, 1) LTE CAT 0, 2) LTE CAT M1, 3) LTE CAT M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communications, and/or 7) LTE M. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of bluetooth, a Low Power Wide Area Network (LPWAN), and ZigBee in view of low power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a Personal Area Network (PAN) related to small/low power digital communication based on various standards including IEEE 802.15.4 and the like, and may be referred to as various names.
The wireless devices 100a to 100f may connect to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other through the BS 200/network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side-link communication) with each other without passing through the BS/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communications (e.g., vehicle-to-vehicle (V2V)/vehicle-to-everything (V2X) communications). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100 a-100 f.
Wireless communication/connection 150a, 150b, or 150c may be established between wireless devices 100a through 100f/BS200 or BS200/BS 200. Here, the wireless communication/connection may be established through various RATs (e.g., 5G NR) such as uplink/downlink communication 150a, side link communication 150b (or D2D communication), or inter-BS communication (e.g., relay, access backhaul Integration (IAB)). The wireless device and BS/wireless device may transmit/receive radio signals to/from each other over wireless communication/connections 150a and 150 b. For example, the wireless communication/connections 150a and 150b may transmit/receive signals over various physical channels. To this end, at least a part of various configuration information configuration procedures for transmitting/receiving radio signals, various signal processing procedures (e.g., channel coding/decoding, modulation/demodulation, and resource mapping/demapping), and resource allocation procedures may be performed based on various proposals of the present disclosure.
Fig. 14 illustrates a wireless device according to an embodiment of the present disclosure. The embodiment of fig. 14 may be combined with various embodiments of the present disclosure.
Referring to fig. 14, the first wireless device (100) and the second wireless device (200) may transmit radio signals through various RATs (e.g., LTE and NR). Herein, { the first wireless device (100) and the second wireless device (200) } may correspond to { wireless device (100 x) and BS (200) } and/or { wireless device (100 x) and wireless device (100 x) } in fig. 13.
The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and/or one or more antennas 108. The processor(s) 102 may control the memory(s) 104 and/or transceiver(s) 106 and may be configured to implement the descriptions, functions, processes, proposals, methods and/or operational flows disclosed herein. For example, the processor(s) 102 may process the information in the memory(s) 104 to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver(s) 106. The processor(s) 102 may receive radio signals including the second information/signals through the transceiver 106 and then store information resulting from processing the second information/signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including instructions for performing part or all of the processing controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flows disclosed herein. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem/circuit/chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and/or receive radio signals through the antenna(s) 108. Each transceiver 106 may include a transmitter and/or a receiver. The transceiver(s) 106 may be used interchangeably with Radio Frequency (RF) unit(s). In this disclosure, a wireless device may represent a communication modem/circuit/chip.
The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and/or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and/or transceiver(s) 206 and may be configured to implement the descriptions, functions, processes, proposals, methods and/or operational flows disclosed herein. For example, the processor(s) 202 may process the information in the memory(s) 204 to generate third information/signals and then transmit radio signals including the third information/signals through the transceiver(s) 206. The processor(s) 202 may receive radio signals including fourth information/signals through the transceiver(s) 106 and then store information resulting from processing the fourth information/signals in the memory(s) 204. The memory(s) 204 may be connected to the processor(s) 202 and may store various information related to the operation of the processor(s) 202. For example, memory(s) 204 may store software code including instructions for performing part or all of the processing controlled by processor(s) 202 or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flows disclosed herein. Here, the processor(s) 202 and the memory(s) 204 may be part of a communication modem/circuit/chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 may be connected to the processor(s) 202 and transmit and/or receive radio signals through the antenna(s) 208. Each transceiver 206 can include a transmitter and/or a receiver. The transceiver(s) 206 may be used interchangeably with RF unit(s). In this disclosure, a wireless device may represent a communication modem/circuit/chip.
The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more of processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC and SDAP). The one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and/or operational flows disclosed herein. The one or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational procedures disclosed herein and provide the generated signals to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive signals (e.g., baseband signals) from the one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational procedures disclosed herein.
The one or more processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more of processors 102 and 202 may be implemented in hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in the one or more processors 102 and 202. The descriptions, functions, procedures, suggestions, methods and/or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, procedures or functions. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and/or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, driven by one or more processors 102 and 202. The descriptions, functions, procedures, suggestions, methods and/or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and/or command sets.
The one or more memories 104 and 204 may be coupled to the one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, code, instructions, and/or commands. One or more of the memories 104 and 204 may be comprised of read-only memory (ROM), random-access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drives, registers, cash memory, a computer-readable storage medium, and/or combinations thereof. The one or more memories 104 and 204 may be located internal and/or external to the one or more processors 102 and 202. The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 by various techniques such as a wired or wireless connection.
One or more transceivers 106 and 206 may transmit the user data, control information, and/or radio signals/channels referred to in the methods and/or operational flows of this document to one or more other devices. One or more transceivers 106 and 206 may receive the user data, control information, and/or radio signals/channels mentioned in the descriptions, functions, procedures, proposals, methods, and/or operational flows disclosed herein from one or more other devices. For example, one or more transceivers 106 and 206 may be coupled to one or more processors 102 and 202 and may transmit and receive radio signals. For example, the one or more processors 102 and 202 may perform control such that the one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. The one or more processors 102 and 202 may perform control such that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive the user data, control information, and/or radio signals/channels mentioned in the descriptions, functions, procedures, proposals, methods, and/or operational flows disclosed herein through one or more antennas 108 and 208. In this document, the one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 may convert received radio signals/channels, etc., from RF band signals to baseband signals to process the received user data, control information, radio signals/channels, etc., using the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc., processed using the one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may comprise (analog) oscillators and/or filters.
Fig. 15 illustrates a signal processing circuit for transmitting a signal according to an embodiment of the present disclosure. The embodiment of fig. 15 may be combined with various embodiments of the present disclosure.
Referring to fig. 15, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). The operations/functions of fig. 15 may be performed without limitation to the processor (102, 202) and/or transceiver (106, 206) of fig. 14. The hardware elements of fig. 15 may be implemented by the processor (102, 202) and/or the transceiver (106, 206) of fig. 14. Blocks 1010 through 1060 may be implemented, for example, by the processor (102, 202) of fig. 14. Alternatively, blocks 1010 through 1050 may be implemented by the processor (102, 202) of fig. 14, and block 1060 may be implemented by the transceiver (106, 206) of fig. 14.
The codeword may be converted into a radio signal via the signal processing circuit (1000) of fig. 15. Herein, a codeword is a coded bit sequence of an information block. The information blocks may include transport blocks (e.g., UL-SCH transport blocks, DL-SCH transport blocks). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).
In particular, the codeword may be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence used for scrambling may be generated based on an initial value, and the initial value may include ID information of the wireless device. The scrambled bit sequence may be modulated into a modulation symbol sequence by modulator 1020. The modulation scheme may include pi/2-binary phase shift keying (pi/2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence may be mapped to one or more transport layers by layer mapper 1030. The modulation symbols for each transport layer may be mapped (precoded) to the corresponding antenna port(s) by precoder 1040. The output z of the precoder 1040 may be derived by multiplying the output y of the layer mapper 1030 by an N x M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 may perform precoding after performing transform precoding (e.g., DFT) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.
The resource mapper 1050 may map the modulation symbols for each antenna port to time-frequency resources. The time-frequency resources may include a plurality of symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and a plurality of subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to other devices through each antenna. To this end, the signal generator 1060 may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.
The signal processing procedure for the signal received in the wireless device can be configured in a manner opposite to that of the signal processing procedures (1010-1060) of fig. 15. For example, a wireless device (e.g., 100, 200 of fig. 14) may receive radio signals from outside through an antenna port/transceiver. The received radio signal may be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. The baseband signal may then be recovered into codewords by a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword may be restored to the original information block by decoding. Accordingly, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post encoder, a demodulator, a descrambler, and a decoder.
Fig. 16 illustrates another example of a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms according to use cases/services (refer to fig. 13). The embodiment of fig. 16 may be combined with various embodiments of the present disclosure.
Referring to fig. 16, a wireless device (100, 200) may correspond to the wireless device (100, 200) of fig. 14 and may be configured by various elements, components, units/portions and/or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional component (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and/or one or more memories (104, 204) of fig. 14. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and/or one or more antennas (108, 208) of fig. 14. The control unit (120) is electrically connected to the communication unit (110), the memory (130) and the additional components (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical/mechanical operation of the wireless device based on programs/code/commands/information stored in the memory unit (130). The control unit (120) may transmit information stored in the memory unit (130) to the outside (e.g., other communication device) via the communication unit (110) through a wireless/wired interface, or store information received from the outside (e.g., other communication device) via the communication unit (110) through a wireless/wired interface in the memory unit (130).
The add-on component (140) may be variously configured according to the type of wireless device. For example, the additional component (140) may include at least one of a power unit/battery, an input/output (I/O) unit, a driving unit, and a computing unit. The wireless device may be implemented in, but is not limited to, the following form: robot (100 a of fig. 13), vehicle (100 b-1 and 100b-2 of fig. 13), XR device (100 c of fig. 13), handheld device (100 d of fig. 13), home appliance (100 e of fig. 13), ioT device (100 f of fig. 13), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, financial science and technology device (or financial device), security device, climate/environment device, AI server/device (400 of fig. 13), BS (200 of fig. 13), network node, etc. Depending on the use case/service, the wireless device may be used in a mobile or stationary location.
In fig. 16, various elements, components, units/portions and/or modules in the wireless device (100, 200) may all be connected to each other through a wired interface, or at least portions thereof may be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) may be connected by wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly by the communication unit (110). Each element, component, unit/section and/or module within the wireless device (100, 200) may also include one or more elements. For example, the control unit (120) may be constructed by a set of one or more processors. As an example, the control unit (120) may be constructed by a set of a communication control processor, an application processor, an Electronic Control Unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory (130) may be constructed from Random Access Memory (RAM), dynamic RAM (DRAM), read Only Memory (ROM), flash memory, volatile memory, non-volatile memory, and/or combinations thereof.
Hereinafter, an example of implementing fig. 16 will be described in detail with reference to the accompanying drawings.
Fig. 17 illustrates a handheld device according to an embodiment of the present disclosure. The handheld device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a Mobile Station (MS), a User Terminal (UT), a mobile subscriber station (MSs), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or a Wireless Terminal (WT). The embodiment of fig. 17 may be combined with various embodiments of the present disclosure.
Referring to fig. 17, the handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140 a), an interface unit (140 b), and an I/O unit (140 c). The antenna unit (108) may be configured as part of a communication unit (110). Blocks 110 through 130/140a through 140c correspond to blocks 110 through 130/140, respectively, of fig. 16.
The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling constituent elements of the handheld device 100. The control unit 120 may include an Application Processor (AP). The memory unit 130 may store data/parameters/programs/codes/commands required to drive the handheld device 100. The memory unit 130 may store input/output data/information. The power supply unit 140a may supply power to the handheld device 100 and include wired/wireless charging circuits, batteries, and the like. The interface unit 140b may support connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., an audio I/O port and a video I/O port) for connection with external devices. The I/O unit 140c may input or output video information/signals, audio information/signals, data, and/or information input by a user. The I/O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
For example, in the case of data communication, the I/O unit 140c may acquire information/signals (e.g., touch, text, voice, image, or video) input by the user, and the acquired information/signals may be stored in the memory unit 130. The communication unit 110 may convert information/signals stored in the memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. The communication unit 110 may receive radio signals from other wireless devices or BSs and then restore the received radio signals to original information/signals. The recovered information/signals may be stored in the memory unit 130 and may be output as various types (e.g., text, voice, image, video, or haptic) through the I/O unit 140.
Fig. 18 illustrates a vehicle or autonomous vehicle according to an embodiment of the present disclosure. The vehicle or autonomous vehicle may be implemented by a mobile robot, a car, a train, a manned/unmanned Aircraft (AV), a ship, or the like. The embodiment of fig. 18 may be combined with various embodiments of the present disclosure.
Referring to fig. 18, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140 a), a power supply unit (140 b), a sensor unit (140 c), and an autonomous driving unit (140 d). The antenna unit (108) may be configured as part of a communication unit (110). Blocks 110/130/140a through 140d correspond to blocks 110/130/140, respectively, of FIG. 16.
The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gnbs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or the autonomously driven vehicle 100. The control unit 120 may include an Electronic Control Unit (ECU). The drive unit 140a may cause the vehicle or the autonomous driving vehicle 100 to travel on the road. The drive unit 140a may include an engine, motor, transmission, wheels, brakes, steering devices, etc. The power supply unit 140b may supply power to the vehicle or the autonomous driving vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may acquire a vehicle state, external environment information, user information, and the like. The sensor unit 140c may include an Inertial Measurement Unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a gradient sensor, a weight sensor, a heading sensor, a position module, a vehicle forward/backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, and the like. The autonomous driving unit 140d may implement a technique for keeping a lane in which the vehicle is traveling, a technique for automatically adjusting a speed (e.g., adaptive cruise control), a technique for autonomously driving along a determined path, a technique for driving by automatically setting a path in the case where a destination is set, and the like.
For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a such that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to a driving plan (e.g., speed/direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically/periodically acquire the latest traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. In between autonomous driving, the sensor unit 140c may acquire vehicle state and/or ambient information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly acquired data/information. The communication unit 110 may transmit information about the vehicle position, the autonomous driving path, and/or the driving plan to an external server. The external server may predict traffic information data using AI technology or the like based on information collected from the vehicle or the autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or the autonomous driving vehicle.
The claims in this specification can be combined in various ways. For example, the technical features in the method claims of the present specification may be combined to be implemented or performed in an apparatus, and the technical features in the apparatus claims may be combined to be implemented or performed in a method. In addition, the technical features in the method claim(s) and the apparatus claim(s) may be combined to be implemented or performed in the apparatus. In addition, technical features in the method claim(s) and the apparatus claim(s) may be combined to be implemented or performed in the method.
Claims (20)
1. A method for performing wireless communications by a first device, the method comprising:
acquiring a SL DRX configuration, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer;
starting the SL DRX timer;
receiving first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from a second device over a physical side link control channel (PSCCH); and
receiving the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device through the PSSCH,
Wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
2. The method of claim 1, wherein the SL DRX timer is started from a point in time notified by information related to the SL DRX slot offset.
3. The method of claim 2, the SL DRX timer comprising an SL DRX on duration timer.
4. The method of claim 3, wherein the SL DRX configuration further comprises information related to an SL DRX cycle, and
wherein the SL DRX cycle is configured based on the QoS related information.
5. The method of claim 4, wherein the SL DRX configuration further comprises information related to a SL DRX start offset,
wherein the SL DRX cycle is started from a point in time notified by information related to an SL DRX start offset, and
wherein SL DRX operation is initiated based on the SL DRX cycle being initiated.
6. The method of claim 5, wherein the SL DRX start offset is configured based on a layer 2 (L2) destination ID.
7. The method of claim 1, wherein the QoS is a QoS for multicast or broadcast communications, and
wherein the method further comprises:
a QoS is determined for the multicast communication or the broadcast communication.
8. The method of claim 1, wherein the SL DRX slot offset is configured based on a layer 2 (L2) destination ID and information related to the QoS.
9. The method of claim 8, wherein the SL DRX slot offset is configured based on a Most Significant Bit (MSB) of the layer 2 (L2) destination ID or a Least Significant Bit (LSB) of the layer 2 (L2) destination ID.
10. The method of claim 1, wherein the QoS-related information comprises a QoS profile associated with a QoS flow.
11. The method of claim 10, wherein the QoS related information comprises a PC5 5G QoS identifier (5 QI) (PQI) related to the QoS flow.
12. The method of claim 11, wherein the PQI comprises at least one of a resource type, an average window, a maximum data burst amount, a Packet Delay Budget (PDB), a Packet Error Rate (PER), and a priority level.
13. The method of claim 11, wherein the QoS related information further comprises an index related to the PQI.
14. A first apparatus for performing wireless communication, the first apparatus comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:
acquiring a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
the SL DRX timer is started and,
receiving first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from a second device over a physical side link control channel (PSCCH), and
receiving the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device through the PSSCH,
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
15. An apparatus configured to control a first User Equipment (UE), the apparatus comprising:
One or more processors; and
one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
acquiring a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
the SL DRX timer is started and,
receiving first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from a second UE over a physical side link control channel (PSCCH), and
receiving the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second UE through the PSSCH,
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
16. A non-transitory computer-readable medium having instructions recorded thereon that, when implemented by one or more processors, cause the one or more processors to:
Obtaining, by a first apparatus, a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
starting the SL DRX timer by the first device,
receiving, by the first device, first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) from a second device over a physical side link control channel (PSCCH), and
receiving by the first device the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) from the second device via the PSSCH,
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
17. A method for performing wireless communication by a second device, the method comprising:
acquiring a SL DRX configuration, the SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer;
transmitting first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first device through a physical side link control channel (PSCCH); and
Transmitting the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device through the PSSCH,
wherein the SL DRX timer is started based on the SL DRX slot offset;
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
18. A second apparatus for performing wireless communication, the second apparatus comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors coupled to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:
acquiring a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
transmitting first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first device through a physical side link control channel (PSCCH), and
Transmitting the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first device through the PSSCH,
wherein the SL DRX timer is started based on the SL DRX slot offset;
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
19. An apparatus configured to control a second User Equipment (UE), the apparatus comprising:
one or more processors; and
one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
acquiring a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
transmitting first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to a first UE through a physical side link control channel (PSCCH), and
transmitting the second SCI and a Medium Access Control (MAC) Protocol Data Unit (PDU) to the first UE through the PSSCH,
Wherein the SL DRX timer is started based on the SL DRX slot offset;
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
20. A non-transitory computer-readable medium having instructions recorded thereon that, when implemented by one or more processors, cause the one or more processors to:
obtaining, by a second apparatus, a SL DRX configuration including information related to a Side Link (SL) Discontinuous Reception (DRX) slot offset and information related to a SL DRX timer,
transmitting, by the second device, first side link control information (SCI) for scheduling a second SCI and a physical side link shared channel (PSSCH) to the first device over a physical side link control channel (PSCCH), and
transmitting by the second device the second SCI and a Media Access Control (MAC) Protocol Data Unit (PDU) to the first device via the PSSCH,
wherein the SL DRX timer is started based on the SL DRX slot offset;
wherein the second SCI and SL DRX configuration are associated with a multicast type or a broadcast type, and
Wherein the SL DRX slot offset is configured based on information related to quality of service (QoS).
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0074266 | 2021-06-08 | ||
| KR10-2021-0085449 | 2021-06-30 | ||
| KR10-2021-0086437 | 2021-07-01 | ||
| KR20210089481 | 2021-07-08 | ||
| KR10-2021-0089481 | 2021-07-08 | ||
| PCT/KR2022/008063 WO2022260419A1 (en) | 2021-06-08 | 2022-06-08 | Method and apparatus for performing sl drx operation in nr v2x |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117461378A true CN117461378A (en) | 2024-01-26 |
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