Nrsidelink multipath control / data multiplexing

Abstract

A user equipment (UE) for a wireless communication network is described that communicates with one or more network entities (e.g., a base station or another UE) of the wireless communication network. The UE receives a transmission from a network entity, the transmission including a control region (e.g., a physical sidelink control channel (PSCCH)) and a data region (e.g., a physical sidelink shared channel (PSSCH)). The transmission includes a first control message (e.g., a first-stage SCI) in the control region and a second control message (e.g., a second-stage SCI) in the data region. The second control message includes control data and occupies some or all of resources allocated in the data region of the transmission or is associated with control data included in at least a portion of the data region of the transmission.

Description

Technical Field

[0001] This application relates to the field of wireless communication systems or networks, and more specifically, to the transmission of control data to a user equipment (UE) in a wireless communication network. Embodiments of the invention relate to sending control data using novel control message types or multiple control messages within a single transmission. Background Technology

[0002] Figures 1(a) and 1(b) are schematic representations of an example of a terrestrial wireless network 100. As shown in Figure 1(a), the terrestrial wireless network 100 includes a core network 102 and one or more radio access networks RAN1, RAN2, ..., RAN1. N Figure 1(b) shows the Radio Access Network (RAN). n An illustrative representation of the example, the radio access network RAN n Includes one or more base stations gNB1 to gNB5, each serving a specific area surrounding the base station, schematically represented by individual cells 1061 to 1065. Base stations are provided to serve users within the cell. One or more base stations may provide service to users in licensed and / or unlicensed frequency bands. The term base station BS refers to gNB in ​​a 5G network, eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply BS in other mobile communication standards. Users can be fixed or mobile devices. The wireless communication system can also be accessed by mobile or fixed IoT devices connected to the base station or users. Mobile devices or IoT devices can include: physical devices; ground vehicles, such as robots or cars; aircraft, such as manned or unmanned aerial vehicles (UAVs), the latter also known as drones; buildings; and other items and devices with embedded electronics, software, sensors, actuators, etc., and network connections enabling these devices to collect and exchange data across existing network infrastructure. Figure 1(b) shows a schematic view of five cells; however, RAN n It can include more or fewer of these cells, and RAN nIt may also include only one base station. Figure 1(b) shows two user UEs, UE1 and UE2, also referred to as user equipment UEs, in cell 1062 and served by base station eNB2. Another user UE3 is shown in cell 1064 served by base station eNB4. Arrows 1081, 1082 and 1083 schematically represent uplink / downlink connections used for transmitting data from user UE1, UE2 and UE3 to base stations eNB2 and eNB4, or for transmitting data from base stations eNB2 and eNB4 to user UE1, UE2 and UE3. This can be implemented on licensed or unlicensed frequency bands. In addition, Figure 1(b) shows two IoT devices 1101 and 1102 in cell 1064, which can be fixed or mobile devices. IoT device 1101 accesses the wireless communication system via base station eNB4 to receive and transmit data, as schematically indicated by arrow 1121. IoT device 1102 accesses the wireless communication system via user UE3, as schematically indicated by arrow 1123. Each base station gNB1 to gNB5 can be connected to the core network 102, for example, via the S1 interface and its respective backhaul links 1141 to 1145, which is schematically represented in Figure 1(b) by arrows pointing to "core". The core network 102 can be connected to one or more external networks. External networks can be the Internet or private networks (e.g., intranets or any other type of campus network, such as private WiFi or 4G or 5G mobile communication systems). Furthermore, some or all of the base stations gNB1 to gNB5 can be connected to each other via the S1 or X2 interface or XN interface in the NR, via their respective backhaul links 1161 to 1165, which is schematically represented in Figure 1(b) by arrows pointing to "gNBs". The sidelink channel allows direct communication between UEs, also known as device-to-device (D2D) communication. The sidelink interface in 3GPP is designated PC5.

[0003] For data transmission, a physical resource grid can be used. A physical resource grid can include a set of resource elements to which various physical channels and physical signals are mapped. For example, physical channels can include: physical downlink, uplink, and sidelink shared channels PDSCH, PUSCH, and PSSCH carrying user-specific data, also referred to as downlink, uplink, and sidelink payload data; physical broadcast channels PBCH carrying, for example, Master Information Block (MIB), one or more System Information Blocks (SIBs), and one or more Sidelink Information Blocks (SLIBs) (if supported); physical downlink, uplink, and sidelink control channels PDCCH, PUCCH, and PSSCH carrying, for example, downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI); and physical sidelink feedback channels PSFCH carrying PC5 feedback responses. Note that the sidelink interface can support two levels of SCI. This refers to a first control region that includes some parts of the SCI, and optionally, a second control region that contains a second part of the control information.

[0004] For the uplink, the physical channel may also include the Physical Random Access Channel (PRACH) or RACH used by the UE to access the network after synchronization and obtaining the MIB and SIB. Physical signals may include reference signals or symbols (RS), synchronization signals, etc. The resource grid may include frames or radio frames with a specific duration in the time domain and a given bandwidth in the frequency domain. The frame may have a number of subframes of a predetermined length. For example, in 5G, subframes have a duration of 1 ms, as in LTE. Depending on the subcarrier spacing, a subframe includes one or more time slots. For example, with a subcarrier spacing of 15 kHz, a subframe includes one time slot; with a subcarrier spacing of 30 kHz, a subframe includes two time slots; with a subcarrier spacing of 60 kHz, a subframe includes four time slots, and so on. Depending on the cyclic prefix (CP) length, each time slot may then include 12 or 14 OFDM symbols.

[0005] The wireless communication system can be any single-frequency or multi-carrier system using frequency division multiplexing, such as orthogonal frequency division multiplexing (OFDM), orthogonal frequency division multiple access (OFDMA), or any other IFFT-based signal with or without CP, such as DFT-S-OFDM. Other waveforms, such as non-orthogonal waveforms used for multiple access, can be used, for example, filter bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), or universal filter multicarrier (UFMC). The wireless communication system can operate, for example, according to the LTE Advanced Pro standard, or the 5G or NR (New Radio) standard, or the NR-U (New Radio Unlicensed) standard, or the IEEE 802.11 standard.

[0006] The wireless networks or communication systems shown in Figures 1(a) and 1(b) can be heterogeneous networks with different overlapping networks, such as macrocell networks where each macrocell includes macro base stations (e.g., base stations gNB1 to gNB5) and small cell base stations (e.g., femtocells or picocells) (not shown in Figures 1(a) and 1(b)). In addition to the terrestrial wireless networks described above, there are also non-terrestrial wireless communication networks (NTNs), which include spaceborne transceivers such as satellites and / or airborne transceivers such as unmanned aerial vehicle systems. Non-terrestrial wireless communication networks or systems can operate, for example, according to the LTE Advanced Pro standard, or the 5G or NR (New Radio) standard, or the IEEE 802.11 standard, in a manner similar to the terrestrial systems described above with reference to Figures 1(a) and 1(b).

[0007] In mobile communication networks, such as those described above with reference to Figures 1(a) and 1(b) (e.g., LTE or 5G / NR networks), there may be UEs that communicate directly with each other via one or more sidelink SL channels, for example, using PC5 / PC3 interfaces or WiFi Direct. UEs communicating directly with each other via sidelinks may include vehicles communicating directly with other vehicles (V2V communication) or vehicles communicating with other entities in the wireless communication network (e.g., roadside units (RSUs), roadside entities such as traffic lights, traffic signs, or pedestrians) (V2X communication). Depending on the specific network configuration, an RSU may function as a BS or UE. Other UEs may not be vehicle-related UEs and may include any of the aforementioned devices. Such devices may also communicate directly with each other using SL channels (D2D communication).

[0008] When considering two UEs communicating directly with each other via a sidelink, both UEs can be served by the same base station, allowing the base station to provide sidelink resource allocation configuration or assistance to the UEs. For example, the two UEs can be within the coverage area of ​​a base station (one of the base stations depicted in Figures 1(a) and 1(b)). This is called the "within coverage" scenario. Another scenario is called the "outside coverage" scenario. Note that "outside coverage" does not mean that the two UEs are not within one of the cells depicted in Figures 1(a) and 1(b), but rather that these UEs...

[0009] They may not be connected to the base station, for example, they are not in an RRC connected state, so that the UE does not receive any sidelink resource allocation configuration or assistance from the base station, and / or

[0010] It may be connected to a base station, but for one or more reasons, the base station may not provide the UE with sidelink resource allocation configuration or assistance, and / or

[0011] It may connect to base stations that may not support certain services (such as NR V2X services), such as GSM, UMTS, and LTE base stations.

[0012] When considering two UEs communicating directly with each other via a sidelink, for example using a PC5 / PC3 interface, one of the UEs can also connect to the BS and relay information from the BS to the other UE via the sidelink interface, and vice versa. Relay can be performed within the same frequency band (intra-band relay) or in a different frequency band (out-of-band relay). In the first case, communication between the UE and the sidelink can be decoupled using time slots different from those in a Time Division Duplex (TDD) system.

[0013] Figure 2(a) is a schematic representation of a scenario where two UEs communicating directly with each other are both connected to the coverage area of ​​a base station. The base station gNB has a coverage area schematically represented by circle 150, which essentially corresponds to the cells schematically represented in Figures 1(a) and 1(b). The UEs communicating directly with each other include both a first vehicle 152 and a second vehicle 154, both within the coverage area 150 of the base station gNB. Vehicles 152 and 154 are both connected to the base station gNB, and furthermore, they are directly connected to each other via the PC5 interface. The gNB assists in the scheduling and / or interference management of V2V services via control signaling through the Uu interface, which is the radio interface between the base station and the UE. In other words, the gNB provides SL resource allocation configuration or assistance to the UEs, and the gNB assigns resources to be used for V2V communication on the sidelink. This configuration is also referred to as Mode 1 configuration in NR V2X or Mode 3 configuration in LTE V2X.

[0014] Figure 2(b) is a schematic representation of an out-of-coverage scenario where UEs communicating directly with each other are not connected to a base station (although they may be physically located within a cell of the wireless communication network), or some or all of the UEs communicating directly with each other are connected to a base station but the base station does not provide SL resource allocation configuration or assistance. Three vehicles 156, 158, and 160 are shown communicating directly with each other via a side link, for example, using a PC5 interface. Scheduling and / or interference management for V2V services is based on algorithms implemented between the vehicles. This configuration is also referred to as Mode 2 configuration in NR V2X or Mode 4 configuration in LTE V2X. As mentioned above, the scenario in Figure 2(b) being an out-of-coverage scenario does not necessarily mean that the corresponding Mode 2 UE in NR or Mode 4 UE in LTE is outside the coverage area 150 of the base station, but rather that the corresponding Mode 2 UE in NR or Mode 4 UE in LTE is not served by the base station, is not connected to a base station in the coverage area, or is connected to the base station but does not receive SL resource allocation configuration or assistance from the base station. Therefore, it is possible that within coverage area 150 shown in Figure 2(a), in addition to UEs 152 and 154 of NR mode 1 or LTE mode 3, there are also UEs 156, 158, and 160 of NR mode 2 or LTE mode 4. Furthermore, Figure 2(b) schematically illustrates UEs outside the coverage area communicating with the network using relays. For example, UE 160 can communicate with UE1 via a sidelink, which in turn can connect to the gNB via the Uu interface. Therefore, UE1 can relay information between the gNB and UE 160.

[0015] Although Figures 2(a) and 2(b) show vehicular UEs, note that the described in-coverage and out-of-coverage scenarios also apply to non-vehicle UEs. In other words, any UE (such as a handheld device) that communicates directly with another UE using the SL channel can be in-coverage and out-of-coverage scenarios.

[0016] Note that the information in the foregoing sections is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art.

[0017] Starting from the above, improvements or enhancements may be needed to provide additional control information to user equipment. Attached Figure Description

[0018] Embodiments of the present invention will now be described in further detail with reference to the accompanying drawings:

[0019] Figures 1(a) and 1(b) are schematic representations of examples of terrestrial wireless networks, wherein Figure 1(a) shows a core network and one or more radio access networks, and Figure 1(b) is a schematic representation of an example of a radio access network (RAN).

[0020] Figures 2(a) and 2(b) schematically represent in-coverage and out-of-coverage scenarios, wherein Figure 2(a) is a schematic representation of a scenario in which two UEs that communicate directly with each other are connected to the base station within the coverage area, and Figure 2(b) is a schematic representation of a scenario in which UEs communicate directly with each other outside the coverage area.

[0021] Figure 3 An example is shown that includes a transmission comprising a time slot defined by multiple symbols in the time domain and a subchannel defined by multiple RBs in the frequency domain;

[0022] Figure 4 This is an illustrative representation of a wireless communication system, which includes a transmitter (such as a base station) and one or more receivers (such as user equipment UE) for implementing embodiments of the present invention.

[0023] Figure 5 The illustration shows a transmission in the PSSCH including a second-level SCI, which includes additional control data or one or more AIMs and occupies all resources allocated to the payload in the PSSCH according to an embodiment of the first aspect of the invention.

[0024] Figure 6 The illustration shows a transmission of a second-level SCI in the PSSCH according to an embodiment of the first aspect of the invention, the second-level SCI being associated with additional control data or one or more AIMs, the additional control data or one or more AIMs occupying all resources of the PSSCH allocated for the payload;

[0025] Figure 7 The illustration shows the transmission of a first second-level SCI and a second conventional second-level SCI in a PSSCH according to an embodiment of the second aspect of the invention, wherein the first second-level SCI includes additional control information (such as AIM) and the second conventional second-level SCI is associated with data.

[0026] Figures 8(a) and 8(b) illustrate an embodiment of a second aspect of the invention, which includes a plurality of second-level SCIs, each of which includes control information or one or more AIMs, such that the entire PSSCH or data area is occupied by the plurality of second-level SCIs.

[0027] Figures 9(a) and 9(b) illustrate an embodiment of a second aspect of the invention, comprising a plurality of second-level SCIs, each second-level SCI including control information or one or more AIMs, and each second-level SCI being associated with control information or one or more AIMs stored in the PSSCH, such that the entire PSSCH or data area is occupied by the plurality of second-level SCIs; and

[0028] Figure 10An example of a computer system on which the units or modules described in the method according to the invention and the steps of the method are performed is shown. Detailed Implementation

[0029] Embodiments of the invention will now be described in more detail with reference to the accompanying drawings, wherein the same or similar elements have the same assigned reference numerals.

[0030] In a wireless communication system or network (as described above with reference to Figures 1(a) and 1(b) or Figures 2(a) and 2(b)), the payload (such as payload data) to be transmitted between various entities of the wireless communication network can be carried in content referred to as one or more transport blocks (TBs). For example, when considering 3GPP Release 16, NRV2X uses resource pools to transmit and receive data or data packets or payload data, and the resource pools may include the Physical Side Link Control Channel (PSCCH) and the Physical Side Link Shared Channel (PSSCH), as well as other physical layer channels. When a UE transmits data packets in a transport block (TB), the transmission includes one or more time slots formed by a continuous set of symbols across time and one or more subchannels formed by a continuous set of frequency resources or resource blocks (RBs) across frequency. These symbols and RBs include the PSCCH and PSSCH. The PSCCH may occupy the initial symbol and subsequent PSSCH symbols in a time slot.

[0031] Figure 3 An example of transmission 200 is shown, comprising a time slot defined by multiple symbols in the time domain and a subchannel defined by multiple RBs in the frequency domain. One or more initial symbols 202 are automatic gain control (AGC) symbols, followed by symbols 204 occupied by PSCCH 206. Figure 3 In this process, only the portion of RB associated with symbol 204 is occupied by PSCCH, and the remaining RB is occupied by the first portion 208a of PSSCH 208. The remaining symbols 210 of transmission 200 are occupied by PSSCH 208. In other words, Figure 3 The transmission shown includes a control area 206 and a data area 208 (including 208a). Figure 3 In the example, data area 208 also includes symbols 212a and 212b, which are not used for the payload but for carrying the demodulation reference signal DMRS.

[0032] Note that, although Figure 3 The transmission described herein represents one subchannel in the frequency domain, but the embodiment is not limited to a single subchannel. Therefore, a transmission in the frequency domain can also span multiple subchannels, such as five subchannels. Furthermore, this describes the logical structure of the transmission, which means that if more than one subchannel is used for transmission, a frequency gap between two subchannels can also be defined.

[0033] In the control area or PSCCH 206, control information associated with the transmission is transmitted to inform the receiving UE of the existence of transmitted data or data packets, or the existence of one or more future transmissions in future time slots, and multiple messages allowing the receiving UE to successfully decode data packets carried in the PSCCH or data area 208. For example, in NR V2X, the control information can be divided into two levels, such as the first-level sidelink control information SCI 216 carried in the PSCCH or control area 206 and the second-level SCI 218 carried by some symbols in the symbols of the PSCCH or data area 208.

[0034] exist Figure 3 In the example, the first-level SCI sent in PSCCH 206 carries information related to resource allocation in PSSCH 208 and information to enable sensing operations for the Mode 2 UE. For example, the following parameters can be included in the first-level SCI 216, also known as SCI format 1-A:

[0035] Transmission priority

[0036] Frequency resource allocation provides information about the allocation of resources across frequencies, which defines the sub-channels through which data is transmitted in the PSSCH.

[0037] Time resource assignment provides information about resource allocation across time periods, defining the time slots in the PSSCH for data transmission.

[0038] The resource reservation period provides information about repeated resource reservations at the indicated period.

[0039] DMRS mode,

[0040] The second-level SCI format indicates the second-level SCI format that the UE can expect to receive in the PSSCH.

[0041] beta_offset indicator

[0042] Multiple DMRS ports

[0043] Modulation and coding scheme (MCS),

[0044] Additional MCS table indicator,

[0045] Physical side link feedback channel (PSFCH) overhead indication,

[0046] One or more reserved fields.

[0047] A single Level 2 SCI 218 is transmitted along with a payload (such as data packets) in PSSCH 208. The Level 2 SCI 218 carries information for the receiving UE to identify and decode data in PSSCH 208, as well as information about, for example, the HARQ process and SCI feedback. Currently, two Level 2 SCI formats are defined: SCI format 2-A and SCI format 2-B, and only one of these formats can be associated for any given transmission. SCI format 2-A can be used when the transmission uses multicast HARQ feedback option 2, in which case the HARQ information includes ACK or NACK. It can also be used for blind retransmissions and when the multicast transmission is not associated with minimum communication range requirements. The following parameters can be included in a Level 2 SCI with SCI format 2-A:

[0048] HARQ process ID,

[0049] New data indicator NDI,

[0050] Redundant version of transmission,

[0051] The resource ID indicating the resource to be transferred.

[0052] The destination ID indicating the destination of the transmission.

[0053] HARQ feedback enable / disable indicator

[0054] Propagation type indicator,

[0055] CSI request.

[0056] When the transmission uses multicast HARQ feedback option 1, SCI format 2-B can be used, where the HARQ information includes only NACK. It can also be used for blind retransmissions and in cases where multicast transmissions are associated with minimum communication range requirements. The following parameters can be included in a second-level SCI with SCI format 2-B:

[0057] HARQ process ID,

[0058] New Data Indicator (NDI)

[0059] Redundant version of transmission,

[0060] The resource ID indicating the resource to be transferred.

[0061] The destination ID indicating the destination of the transmission.

[0062] HARQ feedback enable / disable indicator

[0063] Region ID,

[0064] Communication range requirements.

[0065] Refer to the above Figure 3 The example described illustrates a transmission 200 between user equipment in a wireless communication network, such as a D2D transmission or V2X transmission via a side link using, for example, a PC5 interface.

[0066] Reference can also be used when transmitting payloads between the UE and RAN entities (such as base stations). Figure 3 Similar structure as described. According to other embodiments, control messages may include multiple DCIs or one or more MAC control elements or RRC messages, and control messages may indicate one or more other control messages in the PDSCH or PUSCH. These other control messages point to control data or payload data in the corresponding PDSCH or PUSCH. To improve communication between entities within a wireless communication network, so-called auxiliary information can be provided. For example, when considering transmissions between user equipment (UEs) in a wireless communication network via sidelinks, improvements in the reliability and latency of transmissions (such as those occurring in vehicular communications or public safety and commercial use cases) can be achieved by providing inter-UE coordination. Inter-UE coordination can be provided by a first UE to a second UE, for example, in the form of a set of resources that the first UE determines are available or unavailable for use by a second UE. This report (also referred to as an auxiliary information message) can be sent to the second UE, which can then use the report to determine which transmission resources the second UE should use for transmission. The report or auxiliary information may be included in one or more auxiliary information messages (AIMs), which may be sent using, for example, a second-level SCI carrying all or all of the resources carrying the AIM in the PSSCH, as described in, for example, European patent application EP 20164706.2 “NR sidelink assistance information messages” filed on 20 March 2020, the contents of which are incorporated herein by reference.

[0067] AIM may also include other information to support UE operations on sidelinks. For example, for operations on SLs, as a supplement to or alternative to resource allocation information, the UE may obtain one or more of the following: link-related auxiliary information, distance-related auxiliary information, geographic area-related auxiliary information, group-related auxiliary information, and relay-related auxiliary information. For example, for link quality information, AIM may provide the UE with one or more of the following:

[0068] The report includes quality information about the link between two or more SL UEs, such as channel quality information or channel state information (CSI) or interference information, or

[0069] Beamforming information, such as the detection reference signal (SRS) or SRS resource indicator (SRI),

[0070] One or more transmission power thresholds, for example, information for limiting UE transmission power to reduce interference on links between other UEs, or information about increasing transmission power to increase coverage between current UEs if there are only a few UEs in the scenario and the current interference is below a certain threshold.

[0071] For example, for distance-related auxiliary information, AIM can provide the UE with one or more of the following:

[0072] The minimum required communication range between two or more SL UEs, for example, to determine whether an SL UE will send a Hybrid Automatic Repeat Request (HARQ) feedback, or

[0073] The physical distance between two or more SL UEs, for example, is used to determine the transmission power to be used.

[0074] A region ID or a list of region IDs associated with the geographic location of another UE and / or other additional UEs, for example, to optimize transmission power or feedback procedures (e.g., HARQ) or to select links for communication.

[0075] For example, for geographic area-related auxiliary information, AIM can provide the UE with one or more of the following:

[0076] Geographic information, such as GPS coordinates, or

[0077] Path tracking information, for example, used to inform other UEs about the UE's direction and speed, or

[0078] Routing information, for example, used to inform other UEs that a UE may be removed from the queue.

[0079] A region ID or a list of region IDs associated with the geographic location of another UE and / or other additional UEs, for example, to optimize transmission power or feedback procedures (e.g., HARQ) or to select links for communication.

[0080] For example, for group-related auxiliary information, AIM can provide the UE with one or more of the following:

[0081] The group's identifier, such as the group ID, or

[0082] The group leader's identifier, such as the group leader ID, or

[0083] Identifiers of one or more group members, such as group member IDs, or

[0084] Configuration information, such as resource pool information indicating which resources will be used for intragroup communication, or

[0085] Transmit relevant information, such as transmission parameters to be used in group communication, such as modulation and coding scheme (MCS), transmit power, timing advance (TA), and HARQ operation.

[0086] A list of group members, or

[0087] The trajectory information of group members, for example, is used to determine the likelihood of the UE leaving the group, or

[0088] Distance or other distance-related information between member UEs (such as vectors with region IDs), for example, used to determine whether to send HARQ feedback, or

[0089] Resources within the resource pool to be used for transmission, or

[0090] Information about adding one or more member UEs to a group or removing one or more member UEs from a group.

[0091] For example, for relay-related auxiliary information, AIM can provide the UE with one or more of the following:

[0092] One or more relay UEs, or

[0093] The capability of one or more relay UEs, or

[0094] The transmission mode of one or more relay UEs, or

[0095] The identifier of one or more relay UEs, such as relay UE ID, or

[0096] The selected relay UE, or

[0097] One or more candidate relay UEs, or

[0098] The ability to set up one or more candidate relay UEs, or

[0099] The transmission mode of one or more candidate relay UEs, or

[0100] Distance and / or path information for one or more candidate relay UEs.

[0101] While conventional methods exist for sending additional control information (such as AIM) between entities in a wireless communication network, these methods may be insufficient to address the enhancements required for transmission between individual network entities, such as improvements in communication reliability and latency, especially when AIM is expected to be sent through the PHY layer.

[0102] Embodiments of the present invention address this problem and provide improvements for sending additional control information (such as one or more AIMs) to network entities (such as user equipment). According to a first aspect of the method, a first control message and a second control message are used, wherein the second control message has a novel format that allows for improved transmission of additional control information (such as one or more AIMs). According to a second aspect, the conventional method using the first and second control messages is further improved by allowing the transmission of additional control information (such as one or more AIMs) by allowing the transmission of two or more second control messages. Embodiments of the present invention can be implemented in the wireless communication system shown in Figures 1(a) and 1(b), which includes a base station and users, such as mobile terminals or IoT devices. Figure 4 This is a schematic representation of a wireless communication system, including a transmitter 300 (such as a base station) and one or more receivers 302, 304 (such as user equipment UE). The transmitter 300 and receivers 302, 304 can communicate via one or more wireless communication links or channels 306a, 306b, 308 (such as radio links). The transmitter 300 may include one or more antennas ANT coupled to each other. T Alternatively, it may include an antenna array with multiple antenna elements, a signal processor 300a, and a transceiver 300b. Receivers 302 and 304 include one or more antennas (ANTs) coupled to each other. UE Alternatively, an antenna array with multiple antennas, signal processors 302a, 304a, and transceivers 302b, 304b may be used. Base station 300 and UEs 302, 304 can communicate via corresponding first wireless communication links 306a and 306b (e.g., radio links) using the Uu interface, while UEs 302, 304 can communicate with each other via a second wireless communication link 308 (e.g., radio link) using the PC5 / side link (SL) interface. When UEs are not served by or connected to a base station (e.g., they are not in an RRC connection state), or more generally, when the base station does not provide SL resource allocation configuration or assistance, UEs can communicate with each other via the side link (SL). Figure 4 Systems or networks Figure 4 One or more UEs 302, 304, and Figure 4 The base station 300 can be operated in accordance with the teachings of the present invention described herein.

[0103] User equipment

[0104] This invention provides a user equipment (UE) for a wireless communication network.

[0105] The UE will communicate with one or more network entities of the wireless communication network, such as a base station or another UE.

[0106] The UE will receive transmissions from network entities, including control areas such as the Physical Side Link Control Channel (PSCCH) and data areas such as the Physical Side Link Shared Channel (PSSCH).

[0107] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0108] Among them, the second control message

[0109] This includes control data and occupies some or all of the resources allocated in the data area of ​​the transmission, or

[0110] Associated with control data included in at least a portion of the transmitted data area.

[0111] According to an embodiment, the control data includes control information useful to the UE that is transmitted in the data area, which is different from any payload to be transmitted in the data area.

[0112] According to an embodiment,

[0113] The first control message includes a parameter indicating the presence of a second control message format in the data area, the parameter indicating that the second control message includes control data and occupies all resources allocated in the transmitted data area, and

[0114] In response to the parameters, the UE will not expect to receive any payload data in the data area, but will instead receive control data such as Auxiliary Information Message (AIM).

[0115] According to an embodiment,

[0116] The first control message includes a parameter indicating the presence of a second control message format in the data area, the parameter indicating that the second control message is associated with control data included in at least a portion of the transmitted data area.

[0117] The second control message includes information for decoding control data present in the data area, and

[0118] In response to the parameters, the UE will not expect to receive any payload data in some or all of the data area, but will instead receive the control data such as AIM, and will use information from the second control message to decode the control data present in the data area.

[0119] According to an embodiment,

[0120] The second control message includes: one or more destination identifiers (IDs) indicating that control data in the transmitted data area is directed to one or more UEs; or one or more group IDs indicating that control data in the transmitted data area is directed to one or more groups of UEs, and

[0121] If the second control message includes a destination ID that matches the ID of the UE or a group ID of a group to which the UE is a member, the UE will decode the control data from the transmitted data area.

[0122] According to an embodiment,

[0123] The first control message includes a portion of the destination ID or group ID, and

[0124] When the destination ID or a portion of the group ID is associated with the ID of the UE, the UE will determine the transmission to be associated with the UE from the decoded first control message.

[0125] This invention provides a user equipment (UE) for a wireless communication network.

[0126] The UE will communicate with one or more network entities of the wireless communication network, such as a base station or another UE.

[0127] The UE will receive transmissions from network entities, including control areas such as the Physical Side Link Control Channel (PSCCH) and data areas such as the Physical Side Link Shared Channel (PSSCH).

[0128] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0129] The transmission includes one or more other second control messages in the data area, such as other second-level SCIs.

[0130] According to an embodiment, the first control message includes parameters pointing to a second control message, and wherein the second control message includes parameters pointing to one of the other second control messages.

[0131] According to an embodiment, two or more other second control messages are included in the transmission, and each other second control message includes a parameter pointing to a second control message following the other second control message.

[0132] According to an embodiment, the second control message

[0133] This includes control data and occupies some of the resources allocated in the data area of ​​the transmission, or

[0134] Associated with control data included in at least a portion of the transmitted data area, or

[0135] It is associated with payload data included in at least a portion of the transmitted data area.

[0136] According to the embodiment, other second control messages

[0137] This includes control data and occupies some of the resources allocated in the data area of ​​the transmission, or

[0138] Associated with control data included in at least a portion of the transmitted data area, or

[0139] It is associated with payload data included in at least a portion of the transmitted data area.

[0140] According to an embodiment, the first control message

[0141] Indicates the number of second control messages associated with the first control message in the transmission, and / or

[0142] Includes a plurality of second control message format indicators that indicate the presence and / or format of the second control message.

[0143] According to an embodiment,

[0144] The transmission includes one or more MAC elements (such as MAC PDUs or MAC headers) that indicate that control data in the data area of ​​the transmission is directed to one or more UEs or a group or more groups of UEs, and

[0145] The UE will decode the control data to be directed to the UE from the data area being transmitted, as indicated by the MAC header.

[0146] According to an embodiment,

[0147] The CRC of the second control message and / or other second control messages is scrambled with one or more destination identifier IDs or one or more group IDs, wherein the one or more destination identifier IDs indicate one or more UEs to which the control data in the transmitted data area is directed, and the one or more group IDs indicate one or more groups of UEs to which the control data in the transmitted data area is directed, and / or

[0148] The UE will perform blind decoding on the data area to obtain control data from the data area transmitted in relation to the UE.

[0149] According to an embodiment,

[0150] The first control message includes a portion of the destination ID or group ID, and

[0151] When the destination ID or a portion of the group ID is associated with the ID of the UE, the UE will determine the transmission to be associated with the UE from the decoded first control message.

[0152] According to an embodiment,

[0153] The UE is configured or pre-configured with one or more transmission maps for the data area of ​​the transmission, the transmission maps indicating multiple portions of the data area, each portion being associated with one or more UEs or groups of UEs to which control data in that portion of the transmitted data area is processed, and

[0154] The UE will attempt to decode the portion of the data area transmitted with respect to the UE.

[0155] According to an embodiment, all of the portions of the data region within the transmission have the same size, or some or all of the portions of the data region within the transmission have different sizes.

[0156] According to the embodiments, the UE will be configured or pre-configured with a transport mapping or transport mapping identifier ID at one or more of the following levels:

[0157] For example, through the network, gNB, SIM card, or system-level hardware hard-coded in the UE.

[0158] For example, the resource pool level in the resource pool configuration.

[0159] The transmission used for the transmission includes, for example, control messages such as the transmission level in the first DCI or the first-level SCI.

[0160] At the resource level, for example, one or more mappings are configured by the source network entity sending the transmission and can vary between different network entities.

[0161] According to an embodiment, the UE is configured with a transmission map or a transmission map identifier ID at the transmission level, and wherein the first control message includes the transmission map or the transmission map ID.

[0162] According to an embodiment, each of the plurality of portions of the data area has a portion identifier ID associated therewith, and wherein one or more UEs are configured or pre-configured with a portion ID at one or more of the following levels:

[0163] For example, through the network, gNB, SIM card, or system-level hardware hard-coded in the UE.

[0164] For example, the resource pool level in the resource pool configuration.

[0165] The transmission used for the transmission includes, for example, control messages such as the transmission level in the first DCI or the first-level SCI.

[0166] At the resource level, for example, one or more mappings are configured by the source network entity sending the transmission and can vary between different network entities.

[0167] According to an embodiment, the UE is configured with a partial ID at the transmission level, and the first control message includes the partial ID.

[0168] According to an embodiment, the second control message and / or other second control messages use one or more first aggregation levels, which are different from the second aggregation levels used by the second control messages. The one or more first aggregation levels may be the same or different depending on the nature of the control message or the channel conditions between the source network entity sending the transmission and the UE.

[0169] According to an embodiment, the second control message and each other second control message include one or more of the following parameters:

[0170] Index ID,

[0171] The type of control data,

[0172] The propagation type associated with the control data,

[0173] The duration of validity of the control data, such as an expiration timer,

[0174] Destination ID

[0175] The resource pool ID associated with the control data,

[0176] The priority associated with the control data,

[0177] The associated transmissions in the data area include indications of control data, payload data, or both.

[0178] Time resource indicator value,

[0179] Frequency resource indicator value,

[0180] Region ID, indicating the geographic location or any other reference to the location of the UE.

[0181] The minimum communication range that the UE needs to be within relative to the source network entity.

[0182] According to an embodiment, the control data included in or associated with the second control message and / or associated with other second control messages includes one or more of the following:

[0183] One or more report or auxiliary information messages in AIM, including auxiliary information related to resource allocation.

[0184] One or more report or auxiliary information messages (AIM), including sensing-related information.

[0185] One or more reports or auxiliary information messages (AIMs), including energy-saving related information.

[0186] One or more report or auxiliary information messages in AIM, including DRX or DRX alignment-related information.

[0187] One or more report or assistance messages in the AIM, including information related to group formation or group management.

[0188] One or more Reporting or Assistive Information (AIM) messages, including Channel State Information (CSI) related information such as interference power.

[0189] One or more Reporting or Auxiliary Information Messages (AIMs), including the geographic location or any other reference to the UE's location, such as a region ID.

[0190] One or more Reporting or Auxiliary Information Messages (AIMs) including the minimum communication range that the UE needs to be within relative to the source network entity.

[0191] According to an embodiment,

[0192] Control data included in or associated with the second control message includes one or more AIMs, and

[0193] The AIM indicates the resource in any of the following ways:

[0194] By providing a list of all resources available in one or more time slots,

[0195] By providing a list of all resources that are unavailable in one or more time slots,

[0196] By using a list of resources that are expected to conflict, such as a list of reserved resources that are expected to be transmitted by other UEs,

[0197] Through one or more randomly selected resources available in one or more time slots

[0198] List of resource blocks that are unavailable / reserved within a priority range.

[0199] According to an embodiment, the resources include:

[0200] A time-slot set spanning time and a sub-channel set spanning frequency, or

[0201] One or more resource blocks (RBs) that span time slots in time and sub-channels in frequency.

[0202] According to an embodiment, AIM indicates resources across time in any of the following ways:

[0203] A time-spanning bitmap indicates resources such as OFDM symbols, time slots, subframes, or frames, wherein the set of resources is defined to span a portion or the entire length of a BWP.

[0204] By using initial resources such as time slots or subframes and the duration of the resource set,

[0205] By explicitly specifying the number of resources, such as the number of time slots or subframes.

[0206] By removing resources that are explicitly mentioned or are part of another resource set or RP,

[0207] By initial resources and subsequent periodic offsets.

[0208] By symbols, time slots, subframes, or frame patterns,

[0209] The formula used to define the time resource indicator value TRIV.

[0210] and / or

[0211] The AIM indicates cross-frequency resources in any of the following ways:

[0212] The bitmap indicates resources, such as resource blocks, across a BWP.

[0213] Starting with resources such as resource blocks and multiple resources in a resource set,

[0214] If the resource set is not continuous in frequency, then it is determined by multiple starting resources, such as resource blocks, and ending resources.

[0215] Through explicit resource indexes, such as resource block indexes.

[0216] By removing resources that are explicitly mentioned or are part of another resource set or RP,

[0217] By initial resources and subsequent periodic offsets.

[0218] Through resource block or sub-channel modes,

[0219] The formula used to define the Frequency Resource Indicator (FRIV) value.

[0220] and / or

[0221] The AIM indicates resources across time and frequency in any of the following ways:

[0222] The matrix indicates resources across time, such as symbols, time slots, or subframes or frames, and resources across frequency, such as resource blocks or subchannels.

[0223] The pattern indicates resources across time, such as symbols, time slots, or subframes or frames, and resources across frequency, such as resource blocks or subchannels.

[0224] According to an embodiment,

[0225] The second control message and / or other second control messages include a group ID, and wherein the group ID is mapped to a UE, the UE

[0226] It is expected to receive control data associated with specific events, such as emergencies, like weather alerts.

[0227] Traveling in specific areas, urban UEs traveling in congested city streets, and

[0228] The UE is configured, pre-configured, or hard-coded to receive transmissions associated with the group ID.

[0229] According to the embodiment, the UE will be with

[0230] Use a sidelink SL interface, such as a PC5 interface, to communicate with one or more other UEs, and / or

[0231] The system communicates with one or more radio access network (RAN) entities, such as one or more base stations, using a radio interface such as a Uu interface or a shared access band such as an unlicensed band.

[0232] According to the embodiment, the UE will use a sidelink SL interface, such as the PC5 interface, to communicate with one or more other UEs. The first control message is a first-level SCI, the second control message is a second-level SCI, and other second control messages are second-level SCIs.

[0233] According to an embodiment, the transmitted data area extends across one or more time slots.

[0234] According to an embodiment, the first control message includes a time slot sharing indicator that indicates that resources of a data area are shared among multiple UEs.

[0235] According to an embodiment,

[0236] The control data being transmitted includes one or more Report or Auxiliary Information Messages (AIMs), including resource allocation-related auxiliary information.

[0237] In response to a triggering of a transmission, the UE determines a set of candidate resources for the transmission by selecting resources for the transmission within a selection window after the trigger. The UE selects the resources by considering sensing results obtained by the UE during a sensing window prior to the trigger, which indicate whether certain resources are available or unavailable for the transmission.

[0238] The UE considers the received reports or AIMs, such as AIMs that include sensing results, to select resources for the transmission.

[0239] According to embodiments, the UE and / or other UEs include one or more of the following: a power-limited UE, or a handheld UE (such as a UE used by pedestrians and referred to as a Vulnerable Road User (VRU) or Pedestrian UE (P-UE), or a body-worn or handheld UE used by public safety personnel and first responders and referred to as a Public Safety UE (PS-UE), or an IoT UE. UE (e.g., a sensor, actuator, or UE provided in a campus network for performing repetitive tasks that require input from a gateway node at periodic intervals), mobile or fixed terminal, or cellular IoT-UE, or vehicle-mounted UE, or vehicle group leader (GL) UE, or sidelink relay, or IoT or narrowband IoT (NB-IoT), device or wearable device (such as a smartwatch, fitness tracker, smart glasses), or ground vehicle, or aircraft, or drone, or base station such as gNB, or mobile base station, or roadside unit, or building, or any other item or device (e.g., sensor or actuator) that provides a network connection that enables the item / device to communicate using a wireless communication network, or any other item or device (e.g., sensor, actuator, or transceiver) that provides a network connection that enables the item / device to communicate using a sidelink wireless communication network, or any network entity that supports a sidelink.

[0240] System / Network

[0241] This invention provides a wireless communication system, comprising:

[0242] Multiple user equipment (UEs) are configured for sidelink communication using resources, for example, from the sidelink resource set of the wireless communication system.

[0243] Among them, the plurality of UEs includes one or more UEs of the present invention, and

[0244] The plurality of UEs includes one or more of the other UEs.

[0245] According to the implementation example, for example, if other UEs are not within coverage area or are operating in mode 2, the other UEs will

[0246] A candidate resource set for the transmission will be obtained by selecting resources for the transmission within the selection windows of other UEs. These other UEs will select the resources by considering sensing results obtained by other UEs during their sensing windows, indicating whether certain resources are available or unavailable for the transmission.

[0247] Send one or more AIMs including the sensing results and / or the candidate resource set.

[0248] According to the embodiments, for example, when the UE is in mode 1 or within coverage, other UEs will obtain resources for AIM directly from the resources provided to other UEs by the base station of the wireless communication system, or for example, when the UE is in mode 2 or within or outside coverage, other UEs will obtain resources for AIM indirectly from the resources provided to other UEs by the base station of the wireless communication system via a relay.

[0249] According to an embodiment, the wireless communication system includes one or more base stations, wherein the base station includes one or more of the following: a macro cell base station, or a small cell base station, or a central unit of a base station, or a distributed unit of a base station, or a roadside unit (RSU), or a UE, or a group leader (GL), or a relay, or a remote radio head, or an AMF, or an SMF, or a core network entity, or a mobile edge computing (MEC) entity, or a network slice in an NR or 5G core context, or any transmit / receive point (TRP) that enables an item or device to communicate using the wireless communication network, the item or device being provided with network connectivity to communicate using the wireless communication network.

[0250] radio signals

[0251] This invention provides a radio signal for transmission in a wireless communication network.

[0252] The transmission includes a control area (such as the Physical Side Link Control Channel PSCCH) and a data area (such as the Physical Side Link Shared Channel PSSCH).

[0253] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0254] Among them, the second control message

[0255] This includes control data and occupies some or all of the resources allocated in the data area used for payload transmission, or

[0256] Associated with control data included in at least a portion of the transmitted data area.

[0257] This invention provides a radio signal for transmission in a wireless communication network.

[0258] The transmission includes a control area (such as the Physical Side Link Control Channel PSCCH) and a data area (such as the Physical Side Link Shared Channel PSSCH).

[0259] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0260] The transmission includes one or more other second control messages in the data area, such as other second-level SCIs.

[0261] method

[0262] This invention provides a method for operating a user equipment (UE) in a wireless communication network, wherein the UE communicates with one or more network entities (such as a base station or another UE) in the wireless communication network, the method comprising:

[0263] Transmissions are received from network entities, the transmissions including a control area (such as the Physical Side Link Control Channel PSCCH) and a data area (such as the Physical Side Link Shared Channel PSSCH).

[0264] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0265] Among them, the second control message

[0266] This includes control data and occupies some or all of the resources allocated in the data area of ​​the transmission, or

[0267] Associated with control data included in at least a portion of the transmitted data area.

[0268] This invention provides a method for operating a user equipment (UE) in a wireless communication network, wherein the UE communicates with one or more network entities (such as a base station or another UE) in the wireless communication network, the method comprising:

[0269] Transmissions are received from network entities, the transmissions including a control area (such as the Physical Side Link Control Channel PSCCH) and a data area (such as the Physical Side Link Shared Channel PSSCH).

[0270] The transmission includes a first control message in the control area, such as a first-level SCI, and a second control message in the data area, such as a second-level SCI.

[0271] The transmission includes one or more other second control messages in the data area, such as other second-level SCIs.

[0272] Computer program products

[0273] Embodiments of the present invention provide a computer program product including instructions that, when executed by a computer, cause the computer to perform one or more methods according to the present invention.

[0274] The following description of embodiments of the invention refers to communication via a sidelink by a User Equipment (UE), such that the transmission includes a PSCCH as a control area and a PSSCH as a data area. The first control message may be a first-level SCI, and the second control message may be a second-level SCI. Therefore, the transmission on the sidelink is a combination of PSCCH and PSSCH in one or more time slots, as described above. Figure 3 As described, the PSCCH may include a first-level SCI or first-level control information, and the PSSCH may include a second-level SCI or second-level control information as well as data. According to embodiments of the invention, the PSSCH may include a second-level SCI with a novel format, or may include more than one second-level SCI. The method of the invention allows for improved transmission because it opens up the possibility of combining the first-level SCI and the second-level SCI in an improved manner; for example, the PSSCH may include only the second-level SCI in a new format, i.e., there is no payload transmission, i.e., data packets are not included in the PSSCH. In other words, all resources allocated to the payload in the PSSCH are occupied by the second-level SCI, which in turn includes additional control information (such as AIM). According to other embodiments, the PSSCH may include multiple second-level SCIs, i.e., two or more second-level SCIs. Two or more Level 2 SCIs may include regular SCIs pointing to payloads (such as payloads or data packets carried in the PSSCH), or they may point to data transmissions in the PSSCH that contain additional control information (such as AIM), or they may include Level 2 SCIs with a novel format (i.e., Level 2 SCIs that include AIM), or combinations thereof.

[0275] Additional control information (such as one or more AIMs) can carry different types of content, as described above. For example, in cases where AIMs, sensing results, candidate resource sets, or specific resources are to be used by the receiving UE for transmission, embodiments of the present invention relate to different solutions for addressing the fact that AIMs can include different content.

[0276] Other embodiments of the method of the present invention involve potential updates or changes to the first-level SCI to facilitate the use of the second-level SCI of the present invention, as well as potential new parameters to be included in the new second-level SCI. For example, timing aspects of AIM transmission are described in European patent application 20197035.7, filed September 18, 2020, entitled “Timing aspects for NR SL assistance information messages,” the contents of which are incorporated herein by reference.

[0277] First aspect

[0278] According to an embodiment of the first aspect, the present invention provides a user equipment UE302 for a wireless communication network, which communicates with one or more network entities of the wireless communication network (such as...). Figure 4 (See Base Station 300 or another UE 304) to communicate (see) Figure 4 UE 302 receives transmissions 306a and 308 from network entities 300 and 304, which include control and data areas. Transmissions 306a and 308 include a first control message in the control area and a second control message in the data area. The second control message includes control data and occupies all resources allocated for payload transmission in the data area, or it is associated with control data included in at least a portion of the transmitted data area but may occupy the entire data area. The control data includes or is useful to the UE (also referred to as the receiving UE or RX UE). The control information includes, for example, the aforementioned auxiliary information transmitted in the data area but not the actual payload. In other words, the control data or control information (such as AIM) differs from the regular payload, which is typically the packets actually transmitted in the data area.

[0279] According to a first embodiment of the first aspect of the invention, a new second-level SCI is provided, which occupies all resources allocated for payload transmission in the associated PSSCH. Therefore, control data is either part of or within the second-level SCI. In other words, the second-level SCI occupies the entire data area, meaning that all symbols in the PSSCH intended for data transmission will be used in the second-level SCI, which may contain AIM. (Refer to the above...) Figure 3As mentioned above, there may be some symbols within the PSSCH that are used for PSSCH but not for data transmission, but for DMRS. Figure 5 An embodiment of the first aspect of the invention is shown, which uses a second-level SCI that occupies all resources allocated for data transmission in the PSSCH. (Compared to...) Figure 3 Same, Figure 5 Transmission 200 is shown. For ease of understanding, the AGC and DMRS symbols are not shown. Figure 5 As shown in [the image]. [The image is] related to [the text]. Figure 3 Just like in the middle, also in Figure 5 In this process, transmission 200 includes a first control message or a first-level SCI 216 in the control area or PSCCH 206, and according to the present invention, the entire set of resources allocated for data transmission or payload in the data area or PSSCH 208 is occupied by a second-level SCI 218.

[0280] Therefore, according to this embodiment, the second-level SCI 218 occupies all the resources allocated for transmission in PSSCH 208. As indicated at 220a, the first-level SCI 216 points to the second-level SCI 218 by using a second-level SCI format indicator. The second-level SCI format indicator informs the receiving UE of the second-level SCI format so that the receiving UE knows that all data transmissions or payload resources in the corresponding PSSCH 208 do not contain such data or payload but contain AIM. In other words, in response to the first-level SCI indicating the second-level SCI format indicator, the receiving UE does not expect to receive any payload or any data packets in the PSSCH, but knows that the information included in the PSSCH is control information (such as AIM).

[0281] According to an embodiment, employing a second-level SCI that occupies all resources in the PSSCH may be advantageous when the AIM includes sensing results occupying more than a few symbols, because the AIM effectively indicates all resources within a time period (e.g., the sensing window of the UE sending the AIM) and whether those resources are available or unavailable for transmission. For each of these resources, the AIM may also include measurement data regarding sidelink channel state information (SCI), such as the measured sidelink reference signal received power SL-RSRP. In both cases, the AIM is quite large and may occupy all available resources within the PSSCH. When selecting resources for transmission for the UE, the receiving UE can use additional information from the AIM.

[0282] According to an embodiment, for example, where the AIM includes sensing information that may be associated with multiple UEs (e.g., UEs using the same resource pool or belonging to the same group) located near the UE that created and sent the AIM, a transmission including a second-level SCI 218 occupying all resources allocated for data transmission in the corresponding PSSCH can be sent to multiple receiving UEs. In this embodiment, the second-level SCI may include multiple receiving UE destination IDs or one or more group IDs indicating member UEs of a group. When a transmission including the AIM in the second-level SCI is sent, the UE receiving the transmission can use the included destination IDs to determine whether additional control information or the AIM is intended for them. When the destination ID included in the second-level SCI matches a UE ID, the receiving UE considers the AIM to be directed to it. According to this embodiment, the second-level SCI may include a destination ID field that allows the inclusion of a single UE ID, multiple UE IDs, a single group ID, or multiple group IDs. In other words, the destination ID field allows the use of unicast IDs, multicast IDs, or broadcast IDs. Furthermore, the second-level SCI for occupying all allocated resources in the PSSCH may include, for example, an AIM indicating the availability / unavailability of resources for transmission by:

[0283] By using a list of all resource blocks (RBs) available in one or more time slots,

[0284] By using a list of all resource blocks (RBs) that are unavailable in one or more time slots,

[0285] This is achieved through a list of resource blocks (RBs) expected to conflict, such as a list of reserved resources that are expected to be transmitted by other UEs.

[0286] Through one or more randomly selected resources available in one or more time slots

[0287] List of resource blocks that are unavailable / reserved within a priority range.

[0288] For example, AIM indicates resources across time in any of the following ways:

[0289] A time-spanning bitmap indicates resources such as OFDM symbols, time slots, subframes, or frames, wherein the set of resources is defined to span a portion or the entire length of a BWP.

[0290] By using initial resources such as time slots or subframes and the duration of the resource set,

[0291] By explicitly specifying the number of resources, such as the number of time slots or subframes.

[0292] By removing resources that are explicitly mentioned or are part of another resource set or RP,

[0293] By initial resources and subsequent periodic offsets.

[0294] By symbols, time slots, subframes, or frame patterns,

[0295] The TRIV value is defined in TS 38.214 using the formula used to define the time resource indicator value as follows:

[0296] if N = 1

[0297] TRIV = 0

[0298] elseif N = 2

[0299] TRIV = t1

[0300] else

[0301] if (t2 - t1 - 1) ≤ 15

[0302] TRIV = 30 (t2 - t1 - 1) + t1 + 31

[0303] else

[0304] TRIV = 30 (31 - t2 + t1) + 62 - t1

[0305] end if

[0306] end if

[0307] in,

[0308] N indicates the number of time slots indicated by AIM, where,

[0309] 0 indicates the time slot in which AIM was received.

[0310] 1 indicates the time slot in which the AIM was received and another future time slot relative to the time slot in which the AIM was received.

[0311] 2 represents the time slot in which the AIM was received, and two additional future time slots relative to the time slot in which the AIM was received.

[0312] t1 indicates the first future resource time slot relative to the time slot in which the AIM is received, and

[0313] t2 indicates the second future resource time slot relative to the time slot in which the AIM was received.

[0314] AIM can indicate cross-frequency resources in any of the following ways:

[0315] The bitmap indicates resources, such as resource blocks, across a BWP.

[0316] Starting with resources such as resource blocks and multiple resources in a resource set,

[0317] If the resource set is not continuous in frequency, then it is determined by multiple starting resources, such as resource blocks, and ending resources.

[0318] Through explicit resource indexes, such as resource block indexes.

[0319] By removing resources that are explicitly mentioned or are part of another resource set or RP,

[0320] By initial resources and subsequent periodic offsets.

[0321] Through resource block or sub-channel modes,

[0322] The Frequency Resource Indicator (FRIV) value is defined in TS 38.214 using the formula used to define it:

[0323] .

[0324] AIM can indicate resources across time and frequency in any of the following ways:

[0325] The matrix indicates resources across time, such as symbols, time slots, or subframes or frames, and resources across frequency, such as resource blocks or subchannels.

[0326] The pattern indicates resources across time, such as symbols, time slots, or subframes or frames, and resources across frequency, such as resource blocks or subchannels.

[0327] According to a second embodiment of the first aspect of the invention, a novel second-level SCI is provided, which is associated with data representing additional control information or AIM in the PSSCH. Therefore, the control data is not part of or within the second-level SCI, but is outside of it. In other words, according to this embodiment, the second-level SCI may include control information and actual additional control data, or some or all of the payload-allocated resources of the PSSCH occupied by the AIM, as shown, for example, through the first-level SCI. Figure 6This embodiment of the invention is illustrated, which uses a novel second-level SCI pointing to additional control information or to one or more AIMs, said one or more AIMs occupying all resources allocated for the payload in the PSSCH. The second-level SCI 218 does not include the control information or AIM itself, but rather it includes information that the receiving UE can use to decode the control information or AIM present in PSSCH 208, as indicated at 220b. As indicated at 220a, the first-level SCI 216 points to the second-level SCI 218, which, as indicated at 220b, in turn points to the AIM contained in the remainder of the data area.

[0328] According to the embodiments, in accordance with the above reference Figure 5 Similar to the embodiments described, the PSSCH can include multiple control information or AIMs for different UEs, and the second-level SCI 218 includes multiple destination IDs. This allows receiving UEs that anticipate or expect one or more AIMs to know that the AIMs included in the PSSCH are actually intended for the individual UEs. According to other embodiments, when one or more AIMs are associated with all UEs of a particular UE or a specific group, a group ID can be included in the second-level SCI as an alternative to or supplement to a separate UE ID. For example, this approach can be used when one or more AIMs include sensing results, candidate resource sets, or channel state information associated with multiple UEs or all UEs within a group. When an AIM includes specific resources used only by the receiving UE for its own transmission, it can be considered to be associated only with that receiving UE, and therefore, only a single destination ID indicating to which the UE is directed or anticipates the specific receiving UE can be included. The AIMs included in data area 208 can be referenced above. Figure 5 The description indicates the location of the resource.

[0329] According to the reference Figure 6 In the described embodiments, the second-level SCI 218 may include a destination ID field to include a single UE ID, multiple UE IDs, a single group ID, or multiple group IDs.

[0330] According to other embodiments, control information or AIM may occupy only a portion of the resources allocated for payload in the PSSCH, while the remaining resources in the PSSCH carry the payload, such as data packets. In this case, the second-level SCI may instruct the PSSCH to contain both control information and data payload.

[0331] Second aspect

[0332] According to an embodiment of a second aspect of the present invention, a UE 302 is provided that communicates with one or more network entities 300, 304 of a wireless communication network (see [link]). Figure 3 UE 302 receives transmissions 306a and 308 from network entities 300 and 304, which include control and data areas. A first control message is provided in the control area, and multiple second control messages are provided in the data area.

[0333] According to an embodiment, the first control message may include parameters pointing to a first portion of the second control message, and the first portion of the second control message may include parameters pointing to other second control messages, such that the second control message is pointed to by the previous second control message. Therefore, according to an embodiment of the second aspect of the invention, conventional transmission is modified by providing one or more other second control messages in the data area, in addition to the first control message in the control area and the second control message in the data area. As described above with reference to the first aspect of the invention, the second control message may be a second control message that...

[0334] Occupying some of the resources allocated for payload data in the transmitted data area and including control data, or

[0335] Some of the resources allocated for payload data in the transmitted data area are occupied, and control data is associated with other resources allocated for payload data in the transmitted data area.

[0336] According to other embodiments, the second control message may be a conventional second control message that occupies some of the resources allocated for payload data in the transmitted data area and is associated with payload data that occupies other resources allocated for payload data in the transmitted data area. In other words, the second control message may be a conventional second control message associated with payload data included in at least a portion of the transmitted data area.

[0337] In the following description, embodiments of the second aspect of the invention are also referred to in relation to sidelink communication, such that the first control message can be a first-level SCI, and the second control message can be a second-level SCI. Embodiments of the invention cover the following combinations of second-level SCIs, as shown below:

[0338]

[0339]

[0340]

[0341] Type 1 = SCI that occupies some of the resources allocated for payload transmission in the data area and includes control data.

[0342] Type 2 = SCI that occupies some of the resources allocated for payload transmission in the data area and is associated with control data that occupies other resources allocated for payload transmission in the data area.

[0343] Type 3 = SCI that occupies some of the resources allocated for payload transmission in the data area and is associated with payload data that occupies other resources allocated for payload transmission in the data area.

[0344] The above table illustrates an embodiment employing two second-level SCIs. However, the invention is not limited to these embodiments. According to other embodiments, three or more second-level SCIs of type 1, type 2, or type 3 can be provided in the transmitted data area. Some embodiments from the table above will now be described in more detail.

[0345] According to another embodiment, the transmission may include a second-level SCI containing additional control information (such as AIM) and a regular second-level SCI associated with the data in the PSSCH. Figure 7 This embodiment is illustrated, more specifically, including the transmission 200 of a control area or PSCCH 216 and a data area or PSSCH 208. A first-level SCI or first control message 216 is included in the control area 206, while the data area 218 includes a second-level SCI 218a and a second-level SCI 218b. As indicated at 220a, the first-level SCI 216 points to a first second-level SCI 218a that includes control information or AIM. As further indicated at 220b, the first second-level SCI not only includes AIM but also points to a second second-level SCI 218b, which, as indicated at 220c, in turn points to payload data included in the remainder of the data area 208. Thus, the first-level SCI 216 can use a second-level SCI format indicator to indicate that 220a includes a second-level SCI format 218a containing AIM. The second-level SCI format 218a includes AIM and other parameters indicating the existence of the second-level SCI format 218b (which may be linked to the payload data included in the remainder of the PSSCH resources allocated for transmission 200) and information required by the UE to decode the data payload (e.g., HARQ related information).

[0346] According to other embodiments, the second-level SCI 218b can be associated with and point to control data (such as AIM) that occupies resources allocated to payload data. In other words, the payload data associated with the second-level SCI can actually be control information or AIM.

[0347] The first and second level SCI format 218a may include one or more AIMs that are smaller in size than the AIM described above with reference to the first aspect of the invention. According to an embodiment, a second level SCI 218a including an AIM may be used where the AIM does not include sensing results but includes a set of candidate resources or specific resources to be used by the receiving UE for transmission. According to an embodiment, this is advantageous for unicast transmission when a first UE (e.g., a transmitting UE or TX UE) sends unicast data to a second UE (RX UE), and also provides back to the first UE the resources to be used by the second UE for transmission in response to the initial unicast transmission.

[0348] According to an embodiment, the second-level SCI including AIM may include additional parameters indicating the presence of a data area or other second-level SCI format in PSSCH 208. In cases where the control information included in the first and second second-level SCIs 280a is an AIM containing resource locations, they may be indicated in the same manner as described above with reference to the first aspect of the invention.

[0349] According to other embodiments of the second aspect of the invention, the transmission may include a plurality of second-level SCIs, one or more of which are SCIs according to the first aspect of the invention. Therefore, according to embodiments, all of the PSSCH or all of the resources allocated to the payload within the PSSCH may be occupied by various second-level SCIs including additional control information or AIM.

[0350] Figures 8(a) and 8(b) illustrate embodiments of a second aspect of the invention, which include a plurality of second-level SCIs, each of which includes control information or one or more AIMs, such that the entire PSSCH or data area is occupied by the plurality of second-level SCIs; Figure 8(a) illustrates an embodiment in which the plurality of second-level SCIs are distributed in the time domain, while Figure 8(b) illustrates an embodiment in which the plurality of second-level SCIs are distributed in the frequency domain.

[0351] As shown in Figure 8(a), transmission 200 includes a control region or PSCCH 206 and a data region or PSSCH 208. The control region includes a first-level SCI 216, and all resources of the data region or PSSCH are occupied by various second-level SCIs. In the embodiments of Figures 8(a) and 8(b), although first-level SCI 218a, second-level SCI 218b, and third-level SCI 218c are shown, according to other embodiments, only two or more second-level SCIs may be used. Each of the second-level SCIs includes control information (such as AIM), such that transmission 200, unlike conventional transmissions, does not include any payload data for receiving the UE or RX UE, but only includes additional control information or AIM provided by the various second-level SCIs. In the embodiment of Figure 8(a), the first-level SCI begins at the start of transmission 200 at t0 and extends in the time domain until t1, and the second-level SCI 218b begins at t1. The second-level SCI terminates at t2, and the third-level SCI 218c begins at t2 and ends at t3 (the end of transmission 200). In the frequency domain, apart from the first and second-level SCIs, the second-level SCI extends across the entire sub-channel. The first part of the second-level SCI extends only in the upper part of the sub-channel (i.e., in the region of symbol 204), and the lower part of the sub-channel in these symbols is occupied by control region 206.

[0352] Figure 8(b) shows a structure similar to Figure 8(a), except that, apart from the second second-level SCI 218b and the third second-level SCI 218c which use only symbol 210 (since symbol 204 is occupied by the control region), the individual second-level SCIs are arranged along the frequency domain and extend over the entire length of the time slot. The first second-level SCI 218a starts at the upper boundary f0 of the sub-channel and extends to frequency f1. The second second-level SCI extends between frequency f1 and other frequencies f2, and the third second-level SCI extends from frequency f2 to frequency f3 (the end or lower boundary of the sub-channel of transmission 200).

[0353] As shown in Figures 8(a) and 8(b), the first-level SCI points to the first second-level SCI at 220a, which in turn points to the second second-level SCI at 220b, which, as indicated at 220c, points to the third second-level SCI at 218c. Therefore, the various second-level SCIs point to each other in a chain-like manner. For this purpose, each of the second-level SCIs includes parameters to indicate the presence of other second-level SCI formats, so that the receiving UE of the receiving transmission 200 is aware of the presence of multiple second-level SCIs.

[0354] According to an embodiment, each second-level SCI includes one or more corresponding AIMs that may be associated with different resource pools used to receive the UE or different priorities within a given resource pool. The AIMs may also be associated with transmissions of different propagation types (e.g., unicast, multicast, or broadcast). According to this embodiment, the second-level SCI may contain parameters indicating the resource pool ID associated with the AIM or the priority or propagation type that the AIM can use.

[0355] Similarly, in this embodiment, the multiple second-level SCIs may be intended for use with a single receiving UE or for multiple receiving UEs. According to the embodiment, they can be distinguished by providing one or more destination IDs or one or more group IDs in each of the various second-level SCIs 218a to 218b, as described above.

[0356] According to an embodiment, the first-level SCI 216 includes a second-level SCI format indicator pointing to a single second-level SCI within the second-level SCIs, specifically pointing to the first second-level SCI 218a in the embodiments of Figures 8(a) and 8(b). According to an embodiment, the second-level SCI format indicator included in the first-level SCI 206 may include predefined or configured values ​​for informing the receiving UE that transmission 200 includes not only the second-level SCIs but actually multiple such second-level SCIs. Therefore, according to an embodiment, second-level SCIs 218a to 218c may be provided with new parameters indicating the presence of another second-level SCI located in the data area or PSSCH 208. Furthermore, a destination ID field may be provided in one or more of the second-level SCIs 218a to 218c to include a single or multiple IDs or a single or multiple group IDs. According to an embodiment, each second-level SCI may also include parameters identifying the resource pool ID for which the AIM is intended, and / or the resource priority indicated in the AIM, and / or the propagation type associated with the resource indicated in the AIM.

[0357] Figures 9(a) and 9(b) illustrate further embodiments of the second aspect of the invention, according to which multiple second-level SCIs are employed, associated with various data packets provided in the PSSCH, which may be payload data or additional control information (such as AIM). Figure 9(a) illustrates an embodiment based on the arrangement of multiple second-level SCIs along the time domain, while Figure 9(b) illustrates an embodiment based on the arrangement of additional second-level SCIs along the frequency domain.

[0358] In Figure 9(a), transmission 200 is shown as including a control region or PSCCH 206, which includes a first-level SCI 216. A data region or PSCCH 208 includes a first second-level SCI 218a extending from the start of transmission 200 at time t0 to time t1, and a second second-level SCI 218b starting at t1 and ending at t2 (which is the end of transmission 200). In the embodiment of Figure 9(a), the second-level SCI spans only the sub-section of the sub-channel from frequency f0 to frequency f1, while the frequency range from f1 to f2 (the lower part of the sub-channel) carries data, such as payload data indicated at 222a or control data (such as AIM) indicated at 222b. The first-level SCI 216a points to the first second-level SCI 218a at 220a, which in turn points to the second second-level SCI at 220b.

[0359] Figure 9(b) shows a similar arrangement, except that the second level SCI is arranged along the frequency domain, such that the first level SCI begins at frequency f0 and extends along the frequency domain to frequency f1, and the second level SCI begins at f1 and ends at f2, where f2 is the lower end of the subchannel of transmission 200. Each second level SCI begins at time t0 and t1 respectively and ends at time t2, and the data area or the remainder of the PSSCH holds payload data or control data (such as AIM). Therefore, in the embodiment described with reference to Figures 9(a) and 9(b), multiple second level SCIs 218a and 218b with associated data packets located outside the SCI are transmitted in PSSCH 208. As explained above, the data packets associated with the second level SCI may contain data or AIM, and the second level SCIs 218a and 218b may include parameters for the receiving UE to know whether the associated data contains AIM or data packets, i.e., the payload.

[0360] As described in the previous embodiments, each of the second-level SCIs may include one or more destination IDs indicating the UE to which the information is intended; that is, it may include a single destination ID or multiple destination IDs. Similarly, one or more groups may also be indicated by using individual group IDs.

[0361] As described above, also in this embodiment, the first and second level SCIs indicate the next second level SCI, and the first level SCI may include the aforementioned information for informing the UE of the existence of multiple second level SCIs.

[0362] According to this embodiment, the second-level SCI may include parameters indicating the content of associated data (whether it is control data (such as AIM) or payload (such as data packets)). The second-level SCI may include parameters indicating the presence of other second-level SCIs in the data area. The second-level SCI may include a destination ID field that allows the inclusion of one or more UE IDs or one or more group IDs. Furthermore, according to other embodiments, it may include a resource pool ID associated with the control data or AIM, as well as the priority of the resource indicated in the AIM that can be signaled, and / or the propagation type associated with the resource indicated in the AIM.

[0363] refer to Figure 7 Up to Figure 9(b), some embodiments using multiple Level 2 SCIs have been described; however, the method of the present invention is not limited to these methods, and any combination of Level 2 SCIs (as described in the table above) is possible. Where the control information associated with the Level 2 SCIs includes an AIM indicating the location of resources, these can be obtained through reference as above. Figure 5 The way of describing it is used to indicate.

[0364] According to an embodiment of the second aspect of the present invention, a UE receiving a transmission comprising multiple second-level SCIs can distinguish each second-level SCI, and, if present, the associated data transmission will be decoded by the receiving UE and transmitted in the PSSCH in one of the following ways:

[0365] (a) Head differentiation

[0366] The receiving UE can decode one or more MAC elements (such as a MAC PDU containing one or more MAC control elements CE, or a MAC header) to determine the symbols associated with the receiving UE, and based on this information, the receiving UE can distinguish symbols associated with different AIMs.

[0367] (b) Destination ID differentiation

[0368] The CRC of control data or payload data included in or associated with each of the second-level SCIs can be scrambled using the destination ID of the intended receiving UE. Therefore, the receiving UE can attempt blind decoding of the PSSCH containing multiple second-level SCIs and successfully decode only those portions of the PSSCH relevant to the receiving UE (i.e., symbols across time and RBs across frequency). When this information is associated with a set of UEs, the CRC of the control data or payload data can be scrambled using the multicast ID.

[0369] (c) Transport mapping distinction

[0370] In a wireless communication network, each UE can configure or pre-configure a PSSCH mapping or transmitted data area to indicate to each receiving UE which symbols and RBs are associated with or related to each UE. Therefore, when this mapping is known, the UE knows which part of the PSSCH contains information related to the UE and only these parts can be decoded.

[0371] According to the embodiments, the UE will be configured or pre-configured with a transport mapping or transport mapping identifier ID at one or more of the following levels:

[0372] For example, through the network, gNB, SIM card, or system-level hardware hard-coded in the UE.

[0373] For example, the resource pool level in the resource pool configuration.

[0374] The transmission used for the transmission includes, for example, control messages such as the transmission level in the first DCI or the first level SCI.

[0375] At the resource level, for example, one or more mappings are configured by the source network entity sending the transmission and can vary between different network entities. For instance, transmission mappings are not globally fixed but are signaled based on each resource, allowing different resources to use different mappings. This can be used to optimize transmission mappings, for example, based on the number of receivers, the type of transmission, and receiver capabilities.

[0376] According to an embodiment, this mapping can divide symbols and RBs into different regions, similar to the search space within a CORESET, and each region or portion of the PSSCH can be assigned a region ID or search space ID. These regions are then used to send the second-level SCI, and each region or region ID or search space ID can be configured or pre-configured for the RX UE in the manner described above (i.e., at the system level, at the resource pool level, at the resource level, or at the transport level).

[0377] The receiving UE that receives or knows the transmission mapping knows that certain symbols across time and certain RBs across frequency (which may correspond to a given resource ID) within the transmitted PSSCH are intended for a given UE, such that the UE only decodes these portions of the PSSCH.

[0378] According to other embodiments, the UE can blindly decode a second-level SCI within its pre-configured or configured area to detect, for example, whether associated control data or payload data is intended for the UE by matching the destination ID in the second-level SCI. In response to identifying a transmission intended for itself, the UE attempts to decode the associated control data or payload data.

[0379] The size of the second-level SCI can vary. Therefore, according to embodiments, the PSSCH configuration can include multiple second-level SCIs of the same size or multiple second-level SCIs of varying sizes, such that the size of each region within the mapping can also vary accordingly. Therefore, according to embodiments, multiple transport mappings can be configured or pre-configured for each receiving UE, as explained above, for example, using a mapping index or mapping ID to be indicated to the receiving UE via system-level configuration, resource pool-level configuration, or transport-level configuration.

[0380] According to other embodiments, the second-level SCI can employ different aggregation levels depending on the content of the AIM, the required code rate, or the prevalent channel conditions between the UE and the intended receiving UE. For example, an AIM containing sensing reports can use multiple resources and a high aggregation level, while a smaller set of candidate resources can use a lower aggregation level.

[0381] Overview

[0382] Although various aspects and embodiments of the method of the present invention have been described separately, it should be noted that each aspect / embodiment can be implemented independently of each other, or some or all aspects / embodiments can be combined. Furthermore, the embodiments described subsequently can be used in each aspect / embodiment described so far.

[0383] According to embodiments of the first and second aspects of the present invention, in addition to the parameters already mentioned in the description of the above embodiments, the second-level SCI may further include one or more of the following additional information:

[0384] The second-level SCI index ID is such that, for example, the first and second-level SCIs have a first index ID, the second and second-level SCIs have a second index ID, and so on.

[0385] Type of AIM: Does the AIM include sensing results, candidate resource sets, or indications of specific resources?

[0386] The propagation type associated with AIM: i.e., whether it is unicast, multicast, or broadcast.

[0387] Control the duration of data validity, such as an expiration timer.

[0388] Destination ID (as described above)

[0389] The resource pool ID associated with the control data,

[0390] The priority associated with the control data,

[0391] The associated transmissions in the data area include indications of control data, payload data, or both.

[0392] Time resource indicator value,

[0393] Frequency resource indicator value.

[0394] According to other embodiments of the first and second aspects of the invention, the first-level SCI may use one or more of the still available reserved bits to indicate one or more of the following:

[0395] A portion of the destination ID is included to allow the receiving UE (i.e., the UE receiving the transmission) to determine whether the transmission is actually relevant to the UE by decoding only the Level 1 SCI. This allows the UE to avoid unnecessary decoding of the PSSCH when it determines, based on the decoded portion of the destination ID contained in the Level 1 SCI, that the transmission is not intended for or directed to the receiving UE.

[0396] The number of Level 2 SCIs is used to inform the receiving UE of the number of Level 2 SCIs associated with the Level 1 SCIs.

[0397] A transport mapping index is used to inform the receiving UE, when a transport mapping set is configured or pre-configured, which mapping should be referenced for successful decoding of the Level 2 SCI and any accompanying data (if any) related to the receiving UE.

[0398] Multiple Level 2 SCI format indicators can be used to indicate different additional Level 2 SCI formats by reusing existing Level 2 SCI format indicators with additional bits, or by using default values ​​to indicate the existence of multiple Level 2 SCI formats.

[0399] A transport map or transport map ID is used to directly indicate the aforementioned transport map for subsequent PSSCHs to the receiving UE in the first-level SCI, or, when using a transport map ID, to allow the UE to select one of the configured or pre-configured transport maps to be used for decoding information from subsequent PSSCHs.

[0400] The search area ID or search space ID informs the UE of the specific symbols and RBs within the transport map of the PSSCH that the UE will decode.

[0401] The time slot sharing indicator indicates that PSSCH resources are shared among multiple transmitting UEs, so as to indicate, for example, the occupancy / number of symbols that the first transmitting UE or any other transmitting UE intends to use.

[0402] According to other embodiments, the above parameters may also be included in other second-level SCIs (which may be referred to as pre-second-level SCIs received after the first-level SCI and before the regular second-level SCI) in order to allow successful decoding of the regular second-level SCI.

[0403] According to other embodiments of the invention, the aforementioned destination ID can be used by the receiving UE to determine whether a transmission is intended for the receiving UE. The destination ID may also include one or more group IDs, and when the receiving UE is part of that group, the receiving UE may consider the transmission intended for it. According to other embodiments, group IDs can be mapped to certain use cases. For example, a group ID can be assigned to all UEs expected to receive data or AIM regarding certain weather conditions (such as early tsunami warnings). Another group ID can be assigned to all urban UEs traveling in congested urban traffic. The mapping of group IDs to use cases can be configured or pre-configured system-wide. For example, a UE can be configured, pre-configured, or hard-coded to receive transmissions associated with a specific group ID, enabling any UE to selectively receive any group messages that have been configured to be received.

[0404] In the above embodiments of the present invention, reference has been made to transmission extended over a single time slot; however, it should be noted that the method of the present invention is not limited to this structure, that is, it is not limited to a single time slot, but rather it is equally applicable to any configuration in which transmission is extended over multiple time slots.

[0405] In the above embodiments of the present invention, reference has been made to transmissions via sidelinks using various first-level SCIs and second-level SCIs; however, it should be noted that the method of the present invention is not limited to such transmissions. According to other embodiments, the transmission may originate from one or more radio access network (RAN) entities (one or more base stations) of a wireless communication system, using a radio interface (such as a Uu interface) and including first-level and second-level control messages (such as DCI, MAC CE, or RRC signaling). In this case, the first-level control messages may be transmitted via PDCCH or PDSCH, for example, using DCI, MAC CE, or RRC signaling, and the first-level control messages may point to resource allocation (e.g., PDSCH or PUSCH), including one or more second-level control messages (such as DCI). According to other embodiments, in response to the detection of the first-level control messages, the second-level control messages may be blindly decoded by the UE to determine whether the associated control data or payload data is intended for use by the UE.

[0406] Although some of the above embodiments are described with reference to a Mode 2 UE, it should be noted that the invention is not limited to such embodiments. The teachings of the invention as described herein are equally applicable to a Mode 1 UE performing sensing to obtain, for example, a sensing report for providing the occupancy status of one or more resources or sets of resources.

[0407] While some of the above embodiments are described with reference to sidelink pools, it should be noted that the invention is not limited to such embodiments. Instead, the method of the invention can be implemented in a system or network that provides a set of resources for specific communication between entities in a network, and this resource set can be pre-configured such that entities in the network are aware of the resource set provided by the network, or entities can be configured by a network having the resource set. The resource set provided by the network can be defined as one or more of the following:

[0408] The sidelink resource pool is intended for use by the UE for sidelink communication, such as direct UE-to-UE communication via PC5.

[0409] The configuration authorization includes either the resources to be used by the UE for NR-U communication or the resources to be used by the UE for NR-U communication.

[0410] The configuration authorization includes resources to be used by the de-capable UE or resources to be used by the de-capable UE.

[0411] According to embodiments, a wireless communication system may include a terrestrial network, a non-terrestrial network, or a network or network segment that uses an airborne or spaceborne aircraft or a combination thereof as a receiver.

[0412] According to embodiments of the present invention, the UE and / or other UEs include one or more of the following: a power-limited UE, or a handheld UE (such as a UE used by pedestrians and referred to as a Vulnerable Road User (VRU) or Pedestrian UE (P-UE), or a body-worn or handheld UE used by public safety personnel and first responders and referred to as a Public Safety UE (PS-UE), or an IoT UE (e.g., a sensor, actuator, or UE provided in a campus network for performing repetitive tasks that require input from a gateway node at periodic intervals), mobile or fixed terminal, or cellular IoT-UE, or vehicle-mounted UE, or vehicle group leader (GL) UE, or sidelink relay, or IoT or narrowband IoT (NB-IoT), device or wearable device (such as a smartwatch, fitness tracker, smart glasses), or ground vehicle, or aircraft, or drone, or base station such as gNB, or mobile base station, or roadside unit, or building, or any other item or device (e.g., sensor or actuator) that provides a network connection that enables the item / device to communicate using a wireless communication network, or any other item or device (e.g., sensor, actuator, or transceiver) that provides a network connection that enables the item / device to communicate using a sidelink wireless communication network, or any network entity that supports a sidelink.

[0413] According to embodiments of the present invention, a network entity includes one or more of the following: a macro cell base station, or a small cell base station, or a central unit of a base station, or a distributed unit of a base station, or a roadside unit (RSU), or a user unit (UE), or a group leader (GL), or a relay, or a remote radio head, or an AMF, or an SMF, or a core network entity, or a mobile edge computing (MEC) entity, or a network slice in an NR or 5G core context, or any transmit / receive point (TRP) that enables an item or device to communicate using the wireless communication network, the item or device being provided with network connectivity for communicating using the wireless communication network.

[0414] Although some aspects of the described concept have been described in the context of the apparatus, these aspects also clearly represent a description of the corresponding method, where a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method step also represent a description of a feature of a corresponding block or item or a corresponding apparatus.

[0415] The various elements and features of this invention can be implemented in hardware or software using analog and / or digital circuitry, by executing instructions via one or more general-purpose or special-purpose processors, or as a combination of hardware and software. For example, embodiments of this invention can be implemented in a computer system or another processing system environment. Figure 10 An example of a computer system 600 is shown. These units or modules, and the steps of the methods performed by these units, can be executed on one or more computer systems 600. The computer system 600 includes one or more processors 602, such as dedicated or general-purpose digital signal processors. The processors 602 are connected to a communication infrastructure 604, such as a bus or network. The computer system 600 includes: main memory 606, such as random access memory (RAM); and secondary memory 608, such as a hard disk drive and / or a removable storage drive. The secondary memory 608 may allow computer programs or other instructions to be loaded into the computer system 600. The computer system 600 may also include a communication interface 610 to allow software and data to be transferred between the computer system 600 and external devices. Communication may be in the form of electrical, electromagnetic, optical, or other signals that can be processed by the communication interface. Communication may use wires or cables, optical fibers, telephone lines, cellular telephone links, RF links, and other communication channels 612.

[0416] The terms "computer program medium" and "computer-readable medium" are generally used to refer to tangible storage media, such as removable storage units or hard disks installed in hard disk drives. These computer program products are means for providing software to computer system 600. The computer program (also referred to as computer control logic) is stored in main memory 606 and / or secondary storage 608. The computer program may also be received via communication interface 610. When executed, the computer program enables computer system 600 to implement the present invention. In particular, when executed, the computer program enables processor 602 to implement the processes of the present invention, such as any of the methods described herein. Thus, such a computer program can represent a controller of computer system 600. When the present disclosure is implemented using software, the software may be stored in a computer program product and loaded into computer system 600 using a removable storage drive or an interface (such as communication interface 610).

[0417] Digital storage media, such as cloud storage, floppy disks, DVDs, Blu-ray discs, CDs, ROMs, PROMs, EPROMs, EEPROMs, or FLASH memories, can be used to execute hardware or software implementations. These media store electronically readable control signals that cooperate with or are capable of cooperating with a programmable computer system to execute corresponding methods. Therefore, digital storage media can be computer-readable.

[0418] Some embodiments of the invention include a data carrier having electronically readable control signals, which is capable of cooperating with a programmable computer system to perform one of the methods described herein.

[0419] Typically, embodiments of the present invention can be implemented as a computer program product having program code operable to perform one of these methods when the computer program product is run on a computer. The program code may, for example, be stored on a machine-readable medium.

[0420] Other embodiments include a computer program stored on a machine-readable medium for performing one of the methods described herein. In other words, embodiments of the methods of the invention are therefore computer programs having program code for performing one of the methods described herein when the computer program is run on a computer.

[0421] Therefore, other embodiments of the methods of the present invention are data carriers, digital storage media, or computer-readable media on which a computer program is recorded for performing one of the methods described herein. Thus, other embodiments of the methods of the present invention are data streams or signal sequences representing computer programs for performing one of the methods described herein. The data streams or signal sequences may, for example, be configured to be transmitted via a data communication connection (e.g., via the Internet). Another embodiment includes a processing means, such as a computer or programmable logic device, configured or adapted to perform one of the methods described herein. Other embodiments include a computer on which a computer program is installed for performing one of the methods described herein.

[0422] In some embodiments, a programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions described herein. In some embodiments, the field-programmable gate array may cooperate with a microprocessor to perform one of the methods described herein. Generally, the methods are preferably performed by any hardware device.

[0423] The above embodiments are merely illustrative of the principles of the present invention. It should be understood that modifications and variations of the arrangements and details described herein will be apparent to those skilled in the art. Therefore, the invention is intended to be limited only by the scope of the appended claims and not by the specific details given by way of the description and illustration of the embodiments herein.

Claims

1. A user equipment (UE) for a wireless communication network, comprising: One or more antennas or an antenna array comprising multiple antenna elements. Signal processor, and transceiver The UE is configured to communicate with one or more network entities of the wireless communication network. The UE is configured to receive transmissions from a network entity, the transmissions including a control area and a data area. The transmission includes a first control message in the control area and a second control message in the data area. Among them, the second control message Occupying some of the resources allocated in the data area of ​​the transmission, and including inter-UE coordination information and information for identifying and decoding data in the data area, or It occupies all the resources allocated in the data area of ​​the transmission, and includes only inter-UE coordination information, or It occupies some of the resources allocated in the data area of ​​the transmission, and includes information for identifying and decoding inter-UE coordination information included in the data area of ​​the transmission. The UE coordination information is provided in the form of a set of resources that may or may not be available to the UE.

2. The user equipment (UE) according to claim 1, wherein, The inter-UE coordination information includes control information useful to the UE, the inter-UE coordination information is transmitted in the data area, and is different from any payload to be transmitted in the data area.

3. The user equipment (UE) according to claim 1, wherein The first control message includes a parameter indicating the presence of a second control message format in the data area, the parameter indicating that the second control message includes inter-UE coordination information and occupies all resources allocated in the data area being transmitted. In response to the parameters, the UE is configured not to receive any payload data in the data area, but only to receive inter-UE coordination information.

4. The user equipment (UE) according to claim 1, wherein The first control message includes a parameter indicating the presence of a second control message format in the data area, the parameter indicating that the second control message is associated with inter-UE coordination information included in at least a portion of the transmitted data area. The second control message includes information for decoding the inter-UE coordination information present in the data area, and In response to the parameters, the UE is configured to not expect to receive any payload data in some or all of the data area, but only to receive inter-UE coordination information, and to use information from the second control message to decode the inter-UE coordination information present in the data area.

5. The user equipment (UE) according to claim 3, wherein The second control message includes: One or more destination identifiers (IDs) indicate to one or more UEs to which the inter-UE coordination information in the transmitted data area is directed; Or one or more group IDs, indicating a group or more groups of UEs to which the inter-UE coordination information in the transmitted data area is directed, and The UE is configured to decode inter-UE coordination information from the transmitted data area if the second control message includes a destination ID that matches the ID of the UE or a group ID of a group to which the UE is a member.

6. The user equipment (UE) according to claim 5, wherein The first control message includes a portion of the destination ID or group ID, and The UE is configured to determine from the decoded first control message that the transmission is associated with the UE when the destination ID or a portion of the group ID is associated with the UE's ID.

7. A user equipment (UE) for a wireless communication network, comprising: One or more antennas or an antenna array comprising multiple antenna elements. Signal processor, and transceiver The UE is configured to communicate with one or more network entities of the wireless communication network. The UE is configured to receive transmissions from a network entity, the transmissions including a control area and a data area. The transmission includes a first control message in the control area and a second control message in the data area. The transmission includes one or more other second control messages in the data area. Among them, the other second control messages It occupies some of the resources allocated in the data area of ​​the transmission, and includes only inter-UE coordination information, or It occupies some of the resources allocated in the data area of ​​the transmission, and includes information for identifying and decoding inter-UE coordination information included in the data area of ​​the transmission. The UE coordination information is provided in the form of a set of resources that may or may not be available to the UE.

8. The user equipment (UE) according to claim 7, wherein, The first control message includes a parameter pointing to the second control message, and wherein the second control message includes a parameter pointing to one of the other second control messages.

9. The user equipment (UE) according to claim 7, wherein, Second control message Includes inter-UE coordination information and occupies some of the resources allocated in the data area of ​​the transmission, or Associated with inter-UE coordination information included in at least a portion of the transmitted data area, or It is associated with payload data included in at least a portion of the transmitted data area.

10. The user equipment (UE) according to claim 7, wherein, The other second control messages Includes inter-UE coordination information and occupies some of the resources allocated in the data area of ​​the transmission, or Associated with inter-UE coordination information included in at least a portion of the transmitted data area, or It is associated with payload data included in at least a portion of the transmitted data area.

11. The user equipment (UE) according to claim 7, wherein, The transmission includes one or more MAC elements, which indicate that the inter-UE coordination information in the data area of ​​the transmission is directed to one or more UEs or a group or more groups of UEs. The UE is configured to decode from the transmitted data area the inter-UE coordination information, indicated by the MAC element, to be directed to the UE.

12. The user equipment (UE) according to claim 7, wherein The CRC of the second control message and / or the other second control messages is scrambled with one or more destination identifier IDs or one or more group IDs, wherein, The one or more destination identifiers indicate one or more UEs to which the inter-UE coordination information in the transmitted data area is directed, and the one or more group IDs indicate one or more groups of UEs to which the inter-UE coordination information in the transmitted data area is directed, and / or The UE is configured to perform blind decoding on the data area to obtain inter-UE coordination information related to the UE from the transmitted data area.

13. The user equipment (UE) according to claim 7, wherein The UE is configured or pre-configured with one or more transmission maps for the data area of ​​the transmission, the transmission maps indicating multiple portions of the data area, each portion being associated with one or more UEs or groups of UEs to which inter-UE coordination information in that portion of the transmitted data area is processed, and The UE is configured to attempt to decode the portion of the transmitted data area associated with the UE.

14. The user equipment (UE) according to claim 7, wherein, The second control message and / or the other second control messages use one or more first aggregation levels, which are different from the second aggregation levels used by the second control messages. The one or more first aggregation levels may be the same or different depending on the nature of the control message or the channel conditions between the source network entity sending the transmission and the UE.

15. The user equipment (UE) according to claim 7, wherein, The second control message and each other second control message include one or more of the following parameters: Index ID; The type of coordination information between UEs; The propagation type related to the inter-UE coordination information; The duration of the effective duration of the inter-UE coordination information; Destination ID; Resource pool ID associated with the inter-UE coordination information; Priority associated with the inter-UE coordination information; The associated transmissions in the data area include indications of inter-UE coordination information, payload data, or both inter-UE coordination information and payload. Time resource indicator value; Frequency resource indicator value; Region ID, indicating a geographic location or any other reference to the location of the UE; The minimum communication range that the UE needs to be within relative to the source network entity.

16. The user equipment (UE) according to claim 1 or 7, in, The inter-UE coordination information transmitted includes one or more Reporting or Assistive Information Messages (AIMs), including resource allocation-related auxiliary information. In response to a triggering of a transmission, the UE is configured to determine a set of candidate resources for the transmission by selecting resources for the transmission within a selection window after the triggering. The UE is configured to select the resources by considering sensing results obtained by the UE during a sensing window prior to the triggering, the sensing results indicating whether certain resources are available or unavailable for the transmission. The UE considers the received reports or AIMs.

17. A wireless communication system, comprising: Multiple user equipment (UEs) are configured to perform sidelink communication using resources from the sidelink resource set of the wireless communication system. Wherein, the plurality of UEs includes one or more UEs according to claim 1 or 7, and The plurality of UEs includes one or more of the other UEs.

18. A method for operating a user equipment (UE) of a wireless communication network, the UE communicating with one or more network entities of the wireless communication network, the method comprising: The transmission is received from a network entity, the transmission including a control area and a data area. The transmission includes a first control message in the control area and a second control message in the data area. Among them, the second control message Occupying some of the resources allocated in the data area of ​​the transmission, and including inter-UE coordination information and information for identifying and decoding data in the data area, or It occupies all the resources allocated in the data area of ​​the transmission, and includes only inter-UE coordination information, or It occupies some of the resources allocated in the data area of ​​the transmission, and includes information for identifying and decoding inter-UE coordination information included in the data area of ​​the transmission. The UE coordination information is provided in the form of a set of resources that may or may not be available to the UE.

19. A method for operating a user equipment (UE) of a wireless communication network, the UE communicating with one or more network entities of the wireless communication network, the method comprising: The transmission is received from a network entity, the transmission including a control area and a data area. The transmission includes a first control message in the control area and a second control message in the data area. The transmission includes one or more other second control messages in the data area. Among them, the other second control messages It occupies some of the resources allocated in the data area of ​​the transmission, and includes only inter-UE coordination information, or It occupies some of the resources allocated in the data area of ​​the transmission, and includes information for identifying and decoding inter-UE coordination information included in the data area of ​​the transmission. The UE coordination information is provided in the form of a set of resources that may or may not be available to the UE.

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