Wireless communication system with a specific side link frame structure

Abstract

To provide an improved frame structure for sidelink communication for a wireless communication system in which multiple users perform sidelink communication.SOLUTION: A wireless communication system includes one or more base stations and a plurality of user devices. Sidelink communication by the user devices includes one or more sidelink frames each having a control region and a data region, where the control region includes a first control region and a second control region, where the first control region includes basic information regarding sidelink transmission of a packet, and the second control region includes information regarding one or more data transmission resource locations of the packet. The packet transmission uses two or more data transmission resource locations in a single sidelink frame, and the packet is transmitted in data transmission resource locations across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted in data transmission resource locations across one or more subsequent sidelink frames.SELECTED DRAWING: Figure 5a

Description

【Technical Field】 【0001】 This application relates to the field of wireless communication networks or systems, and more particularly to sidelink communication of user devices in such communication systems. Embodiments relate to the new radio sidelink frame structure NR SL FS. Further embodiments refer to a communication system, corresponding UEs, base stations, and methods. Preferred embodiments relate to NR V2X compliant slot aggregation using two-stage SCI. 【Background Art】 【0002】 FIG. 1 is a schematic diagram of an example of a terrestrial wireless network 100, which, as shown in FIG. 1(a), includes a core network 102 and one or more radio access networks RAN1, RAN2,... RAN N FIG. 1(b) is a schematic diagram of an example of a radio access network RAN n FIG. 1(b) is a schematic diagram of an example of a radio access network RAN nA base station BS can include one or more base stations gNB1 to gNB5, each serving a specific area surrounding the base station, schematically represented by corresponding cells 1061 to 1065. Base stations are provided to serve users within a cell. The term base station BS refers to a gNB in ​​a 5G network, an eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply a BS in other mobile communication standards. Users can be fixed or mobile devices. Wireless communication systems can also be accessed by mobile or fixed IoT devices connecting to base stations or users. Mobile or IoT devices may include physical devices, ground vehicles such as robots and cars, aerial vehicles such as manned and unmanned aerial vehicles (UAVs) (the latter also called drones), buildings, and other items or devices with embedded network connectivity that enables these devices to collect and exchange data across existing network infrastructure, along with electronic circuits, software, sensors, actuators, etc. Figure 1(b) simply shows an illustrative diagram of five cells, but RAN n RAN may contain more or fewer such cells. nThis may include only one base station. Figure 1(b) shows two user UE1 and UE2, also called user equipment UEs, located in cell 1062 and serviced by base station gNB2. Another user UE3 is shown in cell 1064, serviced by base station gNB4. Arrows 1081, 1082, and 1083 schematically represent the uplink / downlink connections for transmitting data from user UE1, UE2, and UE3 to base stations gNB2 and gNB4, or from base stations gNB2 and gNB4 to user UE1, UE2, and UE3. Furthermore, Figure 1(b) shows two IoT devices 1101 and 1102 in cell 1064, which may be stationary or mobile devices. IoT device 1101 accesses the wireless communication system via base station gNB4 to receive and transmit data, as schematically represented by arrow 1121. The IoT device 1102 accesses the wireless communication system via the user UE3, as schematically represented by the arrow 1122. Each base station gNB1 to gNB5 can be connected to the core network 102 via, for example, the S1 interface, through their respective backhaul links 1141 to 1145, which are schematically represented by the arrow pointing to “core” in Figure 1(b). The core network 102 can be connected to one or more external networks. Furthermore, some or all of each base station gNB1 to gNB5 can be interconnected via, for example, the S1 or X2 interface, or the XN interface in NR, through their respective backhaul links 1161 to 1165, which are schematically represented by the arrow pointing to “gNB” in Figure 1(b). 【0003】 A physical resource grid can be used for data transmission. A physical resource grid can comprise a set of resource elements to which various physical channels and physical signals are mapped. For example, a physical channel may include physical downlink shared channels, physical uplink shared channels, and physical sidelink shared channels (PDSCH, PUSCH, PSSCH) that carry user-specific data, also known as downlink payload data, uplink payload data, and sidelink payload data; physical broadcast channels (PBCH) that carry, for example, master information blocks (MIB) and system information blocks (SIB); and physical downlink control channels, physical uplink control channels, and physical sidelink control channels (PDCCH, PUCCH, PSCCH) that carry, for example, downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI). On the uplink, a physical channel may further include a physical random access channel (PRACH or RACH) used by the UE to access the network after the UE has synchronously obtained the MIB and SIB. Physical signals may include reference signals or reference symbols (RS), synchronization signals, etc. Resource grids may comprise frames or radio frames having a fixed duration in the time domain and a given bandwidth in the frequency domain. Frames may have a fixed number of subframes with predefined lengths. Each subframe may contain one or more slots consisting of 12 or 14 OFDM symbols, depending on the cyclic prefix (CP) length. Frames may also consist of fewer OFDM symbols when using, for example, shortened transmit time intervals (sTTI) or mini-slot / non-slot-based frame structures with only a few OFDM symbols. 【0004】 The wireless communication system can be any single-tone or multi-carrier system using frequency division multiplexing, such as an orthogonal frequency division multiplexing (OFDM) system, an orthogonal frequency division multiplexing (OFDMA) system, or any other IFFT-based signal with or without CP, such as DFT-s-OFDM. Other waveforms may be used, such as non-orthogonal waveforms for multiplexing, such as filtered bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), or universal filtered multicarrier (UFMC). The wireless communication system can operate according to, for example, the LTE-Advanced Pro standard, or the 5G standard or NR, i.e., the New Radio standard. 【0005】 The wireless network or wireless communication system depicted in Figure 1 can be a heterogeneous network having separate overlapping networks, such as a network of macrocells in which each macrocell contains macro base stations, such as base stations gNB1 to gNB5, and a network of small cell base stations (not shown in Figure 1), such as femtocells and picocells. 【0006】 In addition to the terrestrial wireless networks described above, there are also non-terrestrial wireless communication networks, including spaceborne transceivers such as satellites and / or airborne transceivers such as unmanned aerial vehicle systems. Non-terrestrial wireless communication networks or wireless communication systems can operate in accordance with standards such as LTE-Advanced Pro, 5G, or NR (new radio), similar to the terrestrial systems described above (see Figure 1). 【0007】 In mobile communication networks, such as LTE or 5G / NR networks as described above with reference to Figure 1, there may be UEs that communicate directly with each other via one or more sidelink (SL) channels, for example using the PC5 interface. Examples of UEs that communicate directly with each other via sidelinks include vehicles communicating directly with other vehicles (V2V communication) and vehicles communicating with other entities in the wireless communication network, such as roadside entities like traffic lights, traffic signs, or pedestrians (V2X communication). Other UEs may not be vehicle-related UEs and may comprise any of the devices described above. Such devices can also communicate directly with each other (D2D communication) using SL channels. 【0008】 When considering two UEs communicating directly with each other via a sidelink, both UEs may be serviced by the same base station, which may then provide them with sidelink resource allocation configuration or assistance. For example, both UEs may be within the coverage area of ​​a base station, such as one of the base stations depicted in Figure 1. This is called an "in-coverage" scenario. Another scenario is called an "out-of-coverage" scenario. "Out-of-coverage" does not mean that there are no two UEs in one of the cells depicted in Figure 1, but rather that these UEs are in a different location. - There may be cases where a connection to the base station is not made, for example, they are not in an RRC connection state, and as a result the UE does not receive any sidelink resource allocation configuration or assistance from the base station, and / or - Although it may connect to a base station, for one or more reasons the base station may not provide the UE with a sidelink resource allocation configuration or assistance, and / or - You may be connected to base stations that do not support NR V2X services, such as GSM base stations, UMTS base stations, LTE base stations, and NR base stations that do not support V2X services. It should be noted that this means... 【0009】 Another scenario is called the "partial coverage" scenario, in which one of two UEs communicating with each other via a sidelink is serviced by the base station, while the other UE is not. 【0010】 When considering two UEs communicating directly with each other via a sidelink, for example via PC5, one of the UEs can also be connected to a BS, and information from the BS can be relayed to the other UE via the sidelink interface. The relay may be carried out in the same frequency band (in-band relay) or using a different frequency band (out-of-band relay). In the first case, communication on the UE and on the sidelink can be separated using different time slots, similar to a time-division duplex (TDD) system. 【0011】 Figure 2 is a schematic diagram of a situation where two UEs communicating directly with each other are both within the coverage of a base station. The base station gNB has a coverage area schematically represented by circle 200, which essentially corresponds to the cell schematically represented in Figure 1. The UEs communicating directly with each other include a first vehicle 202 and a second vehicle 204, both of which are within the coverage area 200 of the base station gNB. Both vehicles 202 and 204 are connected to the base station gNB, and in addition, they are directly connected to each other via the PC5 interface. V2V traffic scheduling and / or interference management are assisted by the gNB via control signaling through the Uu interface, which is the radio interface between the base station and the UEs. The gNB allocates resources used for V2V communication over the sidelink. This configuration is also called a Mode 1 configuration in NR V2X or a Mode 3 configuration in LTE V2X. 【0012】 Figure 3 is a schematic diagram of a situation where the UEs are not within the base station's coverage, i.e., each UE communicating directly with one another may be physically located within a cell of the wireless communication network but not connected to the base station. The three vehicles 206, 208, and 210 are directly connected to each other via sidelinks, for example, using the PC5 interface, in the diagram. V2V traffic scheduling and / or interference management are based on algorithms implemented between these vehicles. This configuration is also known as a Mode 2 configuration in NR V2X or a Mode 4 configuration in LTE V2X. As mentioned above, the out-of-coverage scenario in Figure 3 does not mean that each Mode 4 UE is outside the base station's coverage 200, but rather that each Mode 4 UE is not serviced by a base station, is not connected to a base station in the coverage area, or is connected to a base station but does not receive SL resource allocation configuration or assistance from the base station. Therefore, it is possible that in addition to Mode 3 UE202 and 204, Mode 4 UE206, 208, and 210 also exist within the coverage area 200 shown in Figure 2. 【0013】 In the above-described scenario of a vehicle user device UE, multiple such user devices can form a user device group, also simply called a group, and communication within or between group members can be carried out via a sidelink interface between user devices, such as a PC5 interface. Multiple such groups may exist simultaneously within a wireless communication network or its cell. Although it is stated that communication within a group is carried out via sidelink communication, this does not preclude some or all of the group members from communicating with other entities outside the group, either via the base station or via sidelink, in cases where the group or at least some of its group members are within coverage. For example, the above-described scenario using vehicle user devices can be used in the transportation industry sector, where multiple vehicles equipped with vehicle user devices can be grouped together, for example, by a remote driving application. 【0014】 Other possible use cases where multiple user devices can be grouped together to enable side-link communication with one another include, for example, factory automation and power distribution. In the case of factory automation, user devices can be equipped on multiple mobile or stationary machines within a factory, and these machines can be grouped together so that they can communicate with each other via side-link communication, for example, for controlling the motion of the machines, such as the motion control of robots. In the case of power distribution, user devices can be equipped on each entity within the power distribution grid, and these user devices can be grouped together within a certain area of ​​the system so that they can communicate with each other via side-link communication, thereby enabling monitoring of the system and addressing failures and outages in the power distribution grid. 【0015】 Naturally, in the use cases described above, sidelink communication is not limited to communication within a group. Rather, sidelink communication can occur between any two UEs, such as any pair of UEs. 【0016】 It should be noted that the information in the above sections is intended solely to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art already known to those skilled in the art. [Overview of the Initiative] [Problems that the invention aims to solve] 【0017】 Starting from the conventional technology described above, a wireless communication system that allows multiple users to perform sidelink communication may require an improved frame structure for such sidelink communication. [Means for solving the problem] 【0018】 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. [Brief explanation of the drawing] 【0019】 [Figure 1(a)] This is a schematic diagram of an example of a wireless communication system. [Figure 1(b)] This is a schematic diagram of an example of a wireless communication system. [Figure 2] This is a schematic diagram illustrating a situation where two UEs communicating directly with each other are within the base station's coverage. [Figure 3] This diagram illustrates a scenario where UEs communicating directly with each other are not within the base station's coverage, i.e., they are not connected to the base station. [Figure 4] This figure shows an example of a resource pool defined over time and frequency. [Figure 5a]FIG. is an exemplary diagram showing a sidelink frame structure for illustrating an embodiment in which a first control region and a second control region are arranged together with a data region within the same time slot. [Figure 5b] FIG. is a diagram showing a schematic sidelink frame structure for illustrating an embodiment in which a first control region and a second control region are arranged in different time slots. [Figure 6a] FIG. is a schematic diagram showing a sidelink frame structure comparable to the sidelink frame structure shown by FIG. 5a, in which a first control region is repeated according to an embodiment. [Figure 6b] FIG. is a schematic diagram showing a sidelink frame structure comparable to the sidelink frame structure of FIG. 5b, in which a first control region is repeated according to a further embodiment. [Figure 7a] FIG. is a schematic diagram showing a time frame structure according to an embodiment using another channel, for example, PC5-RRC or Uu-RRC. [Figure 7b] FIG. is a schematic diagram showing a time frame structure according to an embodiment using another channel, for example, PC5-RRC or Uu-RRC. [Figure 7c] FIG. is a schematic diagram showing a time frame structure according to an embodiment using another channel, for example, PC5-RRC or Uu-RRC. [Figure 8] FIG. is a diagram showing an example of a computer system on which units or modules and method steps described according to the method of the present invention can be executed. 【MODE FOR CARRYING OUT THE INVENTION】 【0020】 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings in which the same or similar elements are assigned the same reference numerals. 【0021】 The initial Vehicle-to-Everything (V2X) specification was included in Release 14 of the 3GPP® standard. Resource scheduling and allocation were modified to conform to V2X requirements, while the original Device-to-Device (D2D) communication standard was used as the basis for the design. Release 15 of the LTE V2X standard (also known as Extended V2X or eV2X), and Release 16 of the 3GPP® and the first release of 5G NR V2X, respectively, focus on V2X slot aggregation. In NR V2X, a set of use cases to be achieved is identified, one of the main focus parts of these use cases is to ensure a certain quality of service (QoS) for a given application service. 【0022】 In one embodiment, two-stage sidelink control information (SCI) can be used effectively. The first stage is used to transmit basic information to the UE, which includes a pointer to the second-stage SCI, and the second-stage SCI is coupled with the corresponding data transmission. Another embodiment is a method of handling slot aggregation for larger transmission volumes. 【0023】 Since the control domain is defined for a single time slot, one objective is to optimize the use of the control domain, particularly for the use of slot aggregation and to achieve maximum reliability in transmission. 【0024】 According to one embodiment (primary embodiment), the wireless communication system may or may not consist of one or more base stations and a plurality of user equipment UEs. The plurality of user equipments are configured for sidelink communication (e.g., sidelink transmission), and the sidelink communication comprises one or more sidelink frames, each having a control area and a data area, the control area comprising a first control area and a second control area, the first control area containing basic information relating to the sidelink transmission of a packet, and the second control area containing information relating to one or more data transmission resource locations for the packet. Here, the transmission of a packet uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location spanning one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location spanning one or more subsequent sidelink frames. 【0025】 Regarding wireless systems, base stations may or may not exist, depending on whether it is an in-coverage or out-of-coverage scenario, or whether the UE is operating in NR mode 1 or NR mode 2. 【0026】 Regarding slot aggregation, it should be noted that this concept can be used to send large packets or to send different redundant versions of the same packet. 【0027】 Embodiments of the present invention are based on the principle that a control domain can consist of two stages, and that dedicated portions within a timeframe can be reserved for these two stages / control domains. The second stage SCI may include information indicating one or more locations of data transmissions, for example, within the same time slot or subsequent time slots. Two-stage SCIs are particularly beneficial in NR V2X applications that support slot aggregation. This concept makes it possible to provide key information within the SCI regarding whether each data transmission will use aggregated data resources or a single data resource. In cases where multiple data resources are aggregated, the transmitted packets span two or more time slots. The following is the content of the control information transmitted within the two control domains (within these aggregated slots). 【0028】 It should be noted that, according to the embodiment, one or more subsequent sidelink frames may be positioned as consecutive or discontinuous sidelink frames for packet transmission by a given UE. This means, for example, that zero (none), one, or more additional sidelink frames may be placed between two subsequent sidelink frames used for the sidelink transmission, where any intermediate sidelink frames may be used by other UEs. 【0029】 Two basic cases are distinguished. In the first case, the first and second control regions are transmitting using the same sidelink frame. In this case, both control regions can also be transmitted together with a portion of the data transmission (e.g., the first portion of the packet), or together with the first version of the data transmission if, for example, a redundant version of the same packet is to be transmitted. 【0030】 According to one embodiment, the first control region may include information indicating a second control region located within the same side link frame, as well as a second control region within each of one or more subsequent side link frames. 【0031】 According to a further embodiment, a sidelink transmission performed by a UE may use one or more subsequent sidelink frames, and the first control region of one or more subsequent sidelink frames will be available or used by another UE or more UEs. 【0032】 It should be noted that the control area is reserved for a specific UE in the communication system. Other UEs are free to use the reserved first control area for purposes such as resource preemption or reservation. 【0033】 According to one embodiment, a sidelink transmission uses one or more subsequent sidelink frames, and information from a first control region transmitted using a first sidelink frame is transmitted again within the first control region of one or more subsequent sidelink frames. This first control region includes information pointing to a second control region in one or more further subsequent sidelink frames. 【0034】 According to a further embodiment, a sidelink transmission may use one or more subsequent sidelink frames, and a second control region of one or more subsequent sidelink frames includes information relating to the data transmission resource location of each sidelink frame, or information relating to multiple data transmission resource locations. 【0035】 According to the second case (embodiment), the first control region and the second control region are transmitted using different sidelink frames, for example, subsequent sidelink frames, where "successive" means located as consecutive or discontinuous sidelink frames. For example, the first control region is transmitted using the first sidelink frame, and the second control region is transmitted using the subsequent second sidelink frame. Here, the first control information may, according to the embodiment, include information pointing to the second control region within each sidelink frame or within the subsequent sidelink frame. 【0036】 According to one embodiment, a second control region, in which a first control region belongs to a sidelink frame transmitted therein, is left vacant by a given transmitting UE and can be used by other UEs or multiple UEs. 【0037】 According to one embodiment, the sidelink transmission uses one or more subsequent sidelink frames, each of which comprises a second control portion. Alternatively, each second control portion of one or more subsequent sidelink frames includes information that points to a data area. 【0038】 According to the embodiment, each first control portion is retransmitted within one or more of the subsequent side link frames. Alternatively, each first control portion includes information pointing to one or more second control portions in one or more further subsequent side link frames. 【0039】 In relation to all the embodiments discussed above, it should be noted that, according to further embodiments, the first control portion may include information regarding the destination ID of the RX UE. Alternatively, it may include information regarding several data transmission resource locations and / or several sidelink frames used for the data transmission resource locations, and / or information pointing to each second control portion transmitted using subsequent sidelink frames. 【0040】 Embodiments provide a user device UE for a wireless communication system which may or may not have one or more base stations and a plurality of user device UEs configured for sidelink communication. The sidelink communication comprises one or more sidelink frames, each having a control area and a data area, the control area comprising a first control area and a second control area, the first control area containing basic information relating to the sidelink transmission of a packet, and the second control area containing information relating to one or more data transmission resource locations for the packet, wherein the transmission of the packet uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location across one or more subsequent sidelink frames. 【0041】 The embodiment provides a base station for a wireless communication system having one or more base stations and a plurality of user device UEs configured for sidelink communication, wherein the sidelink communication comprises one or more sidelink frames, each having a control area and a data area. The control area comprises a first control area and a second control area, the first control area containing basic information relating to the sidelink transmission of a packet, and the second control area containing information relating to one or more data transmission resource locations for the packet. The packet transmission uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location across one or more subsequent sidelink frames. 【0042】 Embodiments provide a method for sidelink communication in a wireless communication system, which may or may not have one or more base stations and a plurality of user device UEs configured for sidelink communication, wherein the sidelink communication comprises one or more sidelink frames, each having a control region and a data region. The control region comprises a first control region and a second control region, the first control region containing basic information relating to the sidelink transmission of a packet, and the second control region containing information relating to one or more data transmission resource locations for the packet. The transmission of the packet uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location across one or more subsequent sidelink frames. 【0043】 Note that within a given transmission time interval (TTI) or subframe, the transmitting UE broadcasts sidelink control information (SCI) within the control channel, followed by the broadcast of data within the same subframe. The SCI points to a resource within the subframe on which data is transmitted, and the receiving UE listens on the control subchannel, thereby knowing where the data is to be received when it receives the SCI. 【0044】 According to an embodiment (further embodiment), a wireless communication system comprising zero, one or more base stations and a plurality of user equipment UEs configured for (sidelink) communication. The (sidelink) communication comprises one or more (sidelink) frames, each having a control area and a data area, wherein control information belonging to a first control area is transmitted within the control area as a first control area of ​​the control area. Control information belonging to a second control area is transmitted or partially transmitted using a Layer 2 (PC5-) RRC configuration. 【0045】 Embodiments of this aspect are based on the finding that information transmitted using a second control region (see above) can be transmitted, in whole or in part, via a type of upper-layer signaling, in this case a Layer 2 PC5-RRC configuration, which is transmitted via a sidelink or PC5 (also known as a sidelink radio resource control configuration or PC5 radio resource control configuration). 【0046】 It should be noted that "completely" means that only the first control region within the sidelink frame is used, while the complete information belonging to the second control region is transmitted using PC5-RRC. "Partially" means that the first control region and the second control region, having a reduced size, are used in conjunction with the Layer 2 PC5-RRC configuration. This is beneficial because the reduced size of the second control region (reduced to zero according to the embodiment) allows for more resources to be used for data transmission within each sidelink frame. Since the first control region is used within each sidelink frame, it is still possible to direct each sidelink communication. 【0047】 According to this embodiment, control information belonging to the second control area is partially transmitted as the second control area of ​​the control area. 【0048】 According to the embodiment, the first control region is transmitted using a sidelink frame prior to the sidelink frame used for the packet's sidelink transmission, or together with the packet's sidelink transmission. 【0049】 According to the embodiment, the second control region is transmitted using one or more subsequent time sidelink frames. 【0050】 According to the embodiment, the size required to transmit the second control region is gradually reduced. In other words, the amount of control information belonging to and transmitted using the second control region is reduced, while the amount of control information belonging to the second control region and transmitted using the Layer 2 PC5-RRC configuration is increased, or conversely, the amount of control information belonging to and transmitted using the second control region is increased, while the amount of control information belonging to the second control region and transmitted using the Layer 2 PC5-RRC configuration is reduced. Each increase or decrease in the amount of control information belonging to the second control region is made with respect to one or more subsequent time sidelink frames. For example, the amount of control information transmitted within the second control region is gradually reduced in each subsequent sidelink frame used for transmission. 【0051】 According to the embodiment, the second control region is transmitted using a sidelink frame prior to the sidelink frame used for the packet's sidelink transmission, or together with the packet's sidelink transmission. 【0052】 According to the embodiment, the first control area includes information that points to the second control area, or information belonging to the second control area that is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration. Alternatively, the information belonging to the second control area that is transmitted or partially transmitted as the second control area of ​​the control area includes information that points to the second control area, or information belonging to the second control area that is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration, and / or the second control area includes information relating to one or more data transmission resource locations of a packet. 【0053】 According to the embodiment, packet transmission is to use two or more data transmission resource locations within a single sidelink frame, and / or the packet is to be transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are to be transmitted within a data transmission resource location across one or more subsequent sidelink frames. 【0054】 In a further embodiment, the principle discussed above, which involves using an RRC configuration, can be applied to communication between a base station and a UE. 【0055】 Therefore, one embodiment provides a communication system in which control information is control information transmitted by one or more base stations. Here, information belonging to a second control domain is transmitted using an RRC configuration via a Uu link rather than an RRC configuration via a PC5 link. 【0056】 Another embodiment provides a user device UE for a wireless communication system which may or may not have one or more base stations and a plurality of user device UEs configured for (sidelink) communication. The (sidelink) communication comprises one or more (sidelink) frames, each having a control region and a data region. Control information belonging to a first control region is transmitted within the control region as a first control region of the control region, and control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration (generally RRC). 【0057】 Another embodiment provides a base station for a wireless communication system having one or more base stations and a plurality of user device UEs configured for (sidelink) communication. The (sidelink) communication comprises one or more (sidelink) frames, each having a control region and a data region, wherein control information belonging to a first control region is transmitted within the control region as a first control region of the control region, and control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 (PC5-) RRC configuration. 【0058】 Another embodiment provides a method for wireless (sidelink) communication in a wireless communication system which may or may not have one or more base stations and a plurality of user device UEs configured for (sidelink) communication. The (sidelink) communication comprises one or more sidelink frames, each having a control region and a data region, wherein control information belonging to a first control region is transmitted within the control region as a first control region of the control region, and control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 (PC5-) RRC configuration. 【0059】 In relation to all the embodiments / models discussed above, it must be noted that, according to the embodiment, the UE may comprise one or more of the following: a mobile terminal, or a fixed terminal, or a cellular IoT-UE, or a vehicle UE, or an IoT or narrowband IoT, NB IoT device, or a ground base station vehicle, or an aerial vehicle, or a drone, or a mobile base station, or a roadside unit, or a building, or any other item or device with network connectivity that enables an item / device to communicate using a wireless communication network, such as a sensor or actuator; and the base station may comprise one or more of the following: a macrocell 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, or a UE, or a remote radio head, or an AMF, or an SMF, or a core network unit, or a network slice as seen in the context of NR or 5G core, or any transmit / receive point TRP that enables an item or device with network connectivity that communicates using a wireless communication network to communicate using a wireless communication network. 【0060】 According to the embodiment, the sidelink frame comprises a sidelink subframe, TTI, slots, and / or minislots, which are transmission time intervals, i.e., fixed intervals for which the device reserves resources. 【0061】 It should be noted that the methods described above can be implemented by a computer. Therefore, in one embodiment, we refer to a computer program for carrying out instructions defined by the methods discussed above. 【0062】 It should be noted that all the option characteristics discussed above, which have not been adequately discussed in the context of communication systems, can also be applied to the corresponding devices (UE or BS) or methods. 【0063】 The embodiments will be discussed in detail below with reference to the attached drawings. This discussion assumes a case where the transmitted data packets need to span multiple time slots. In this case, the first stage informs the RX UE of the number of retransmissions to come and the location of the second stage SCI corresponding to each retransmission. The second stage contains information about the retransmission resource locations, where the second stage SCI and the data are contained within the same time slot. The inventors propose the following methods for utilizing the control domain in a two-stage SCI model, which are appropriately depicted in Figures 5a to 7. 【0064】 According to a basic embodiment, the control channel comprises a first control region and a second control region, which is shown, for example, in Figure 5a. 【0065】 Figure 5a shows the design of frame structure 1, for example, used in NR V2X. Figure 5 shows six timeframes marked t1 to t6. Within each timeframe t1 to t6, three parts are shown: two control regions 10c1 and 10c2 and a data region 12d. In other words, this means that for each timeframe / sidelink frame, the control region 10c and the data region 12d exist within every time slot. The control region 10c is divided to accommodate the two stages 10c1 and 10c2 of the transmitted SCI. 【0066】 The sidelink structure 1 can accommodate resource portions having, for example, a time domain (frames t1 to t6) and a frequency domain (with control portions 10c1, 10c2 and data portion 12d arranged therein). The resource portion is sometimes also called a subchannel defined within the bandwidth portion (BWP). 【0067】 As already shown, a distinction is made between cases where data packets can be transmitted within a single time slot data area without time slot aggregation (SOTA) and cases where they can be transmitted within different time slots. In Figure 5a, this is a case where time slot aggregation is performed and the first stage SCI 10C1 and the second stage SCI 10C2 are transmitted within the same time slot, for example, t1. 【0068】 According to the embodiment, the first stage / first control area 10c1 can contain basic information, for example, regarding the destination ID of the RX UE. Furthermore, according to the embodiment, the control area 10c1 can contain a pointer that points to a second control area 10c2, or in particular, to one or more second control areas 10c2 located within subsequent time slots, in this case time slots t3 and t5. This pointer is indicated by reference numeral 14p1. According to the embodiment, the second stage / second control area 10c2 can contain information regarding the data transmission resource location of the packet. This may also include a pointer 14p2 that points to each data area 12d. Preferably, since slot aggregation is used for packet transmission, the information contained by 10c2 may include one or more pointers 14p2 that point to multiple data areas 12d in multiple time slots t1, t3, and t5. Needless to say, note that the pointer 14p2 of the control area 10c2 transmitted using time slot t3 simply contains pointers to the data portions 12d of t3 and optionally t5. In other words, starting from the assumption that slot aggregation is used, this means that the second stage 10c2 contains information about the retransmission resource location. 【0069】 Below, we will discuss this principle in detail, including optional elements. 【0070】 The first stage SCI 10c1, the first of the second stage SCI 10c2, and the first transmission 12d are located in the same time slot, in this case within time slot t1. In this case, there is no prior reservation for the aforementioned (sidelink) transmission. The RX UE recognizes the transmission by the first stage SCI 10c1, which points to the first of the second stage SCI 10c2, and the first of the second stage SCI 10c2 points to the first transmission 12d of data belonging to time frame t1. In time slot t3 for the second transmission, the control area of ​​the first stage SCI (i.e., 10c1) remains vacant and can be used by other UEs that wish to reserve a future transmission. The second stage SCI 10c2 of t3, which points to the data 12d of t3, occupies the remaining portion of the time slot. 【0071】 For example, the data area 12d and control areas 10c1 and 10c2 of timeframe t2, t4, or t6 are also available and therefore can be used by other UEs. Timeframes t2, t4, and t6 can also be used in a continuous transmission, in which case the data area 12d and control areas 10c1 and 10c2 will be used for the transmission of the same packet. 【0072】 Figure 5b represents another basic embodiment in which the first stage SCI and the second stage SCI (i.e., 10c1 and 10c2) can be transmitted within different time slots (e.g., t1 and t2). 【0073】 As shown in the figure, the first control area 10c1 is transmitted within time frame t1, while the second control area 10c2 is transmitted within time frame t2. The data area 12d is transmitted within the same time frame t2. Further data within the data area 12d is transmitted during time frames t4 and t6. For example, each frame t4 and t6 may also include its respective second control portion 10c2. 【0074】 As can be seen, the first stage 10c1 and the second stage 10c2 are transmitted within different time slots t1 and t2, while the second control area 10c2 is also transmitted during t4 and t6. According to the embodiment, the first stage 10c1 contains basic information, as well as a pointer 14p1 that points to, for example, the respective second control areas 10c2 within time frames t2, t4, and t6. The second stage may contain information regarding retransmission resource locations, as indicated by the second pointer 14p2. This pointer 14p2 may point to, for example, the respective data areas 12d within time frames t2, t4, and t6. 【0075】 The following describes in detail an embodiment that uses different time slots for the first-stage SCI and the second-stage SCI. As stated, the first-stage SCI is sent only once initially within one time slot, followed by the first of the second-stage SCIs and the first transmission within a later time slot (e.g., directly or with other frames in between). In this case, the first-stage SCI 10c1 acts as a resource reservation for future retransmissions. The time slot used to send the first-stage SCI occupies only the control area of ​​the first-stage SCI 10c1, while the remaining control (10c2) and data area 12d may be used by other UEs or remain vacant. The first-stage SCI 10c1 points to the second-stage SCI 10c2 in time frame t2 (i.e., pointer 14p1). This corresponds to future retransmissions within slots t2 through t6. The future slots used for sidelink transmission, in this case slots t2, t4, and t6, respectively, will each accommodate only the second stage SCI 10c2 and the corresponding data 12d, according to the embodiment. Note that the second stage SCI points to the respective data portions 12d of the respective timeframes t2, t4, and t6. 【0076】 Figure 6a shows another variation that is generally based on the variation discussed in the context of Figure 5a, in which the first stage SCI 10c1 is sent multiple times on time slots t1 and t3, where the second stage SCI 10c2 and data retransmission 12d occur. This means that each frame t1, t3, and t5 contains all three regions: control region 1 10c1 (control region 2 10c2) and data region 12d. This technique is useful when the RX UE misses the first instance of the first stage SCI 10c1 (i.e., time frame t1). If the RX UE misses the first instance of the first stage SCI, it does not completely lose the transmission, but can decode the first stage SCI 10c1 in a later transmission instance (e.g., time frame t3). This adds redundancy to the first stage SCI 10c1, allowing the RX UE to receive the packet. 【0077】 It should be noted that, according to the embodiment, the first stage SCI 10c1 (for example, of t1) may point to each subsequent second stage SCI 10c2 (for example, of t1, t3, and t5), or, according to a further embodiment, the first stage SCI of a subsequent frame may also point to, for example, the 10c1 of t3 or t5. According to one preferred variant, the first instance of the first stage SCI should indicate that there is a repetition in the coming time slot. This makes it possible to drop a transmission for other important transmissions, for example, to perform another higher-priority receive or transmit. Alternatively, each second stage SCI 10c1 may point to a subsequent time frame, for example, the 10c1 of t3, the 10c2 of t3, or the 12d of t3. 【0078】 Figure 6b shows another embodiment that substantially follows the method discussed in the context of Figure 5b. In this case, the first stage SCI 10c1 is sent in advance at the first time (i.e., timeframe t1) and repeated after the retransmission period (i.e., timeframe t5). Note that not all timeframes are indicated by control region 10c1 sent in advance of each timeframe, as shown with respect to timeframe t3. In other words, this means that 10c1 at t1 points to 10c2 at t2 and 10c2 at t4, i.e., pointer 14p1 (and, for example, 10c2 at t6 and 10c1 at t5, as indicated by pointer 14p1'), and 10c1 at t5 points to 10c2 at t6. 【0079】 Figure 7a shows another variation of how control information may be transmitted. In this case, the control information is transmitted partially via time slot t1 as discussed above and partially via higher-layer signaling using an RRC configuration, e.g., a level 2 PC5-RRC configuration. The PC5 RRC configuration is transmitted only in the case of unicast communication, for example, and is piggybacked onto the PSSCH. Within each time slot, at least a data area 12d is defined, and only some time slots have a reserved / used control area 10c. The control area 10c may contain only a first control area 10c1, or it may contain both 10c1 and 10c2. Optionally, a control area 10c2 with a reduced size (including reduction to zero) can be used. This second control area 10c2 is indicated by a dashed line. 【0080】 According to the embodiment, control information is transmitted using at least a first region 10c1 and a PC5 RRC configuration. Depending on the implementation or current requirements, a control section 10c2, or a portion of the control section 10c2, may also be used. For example, the control section 10c1 carries first-stage SCI information 10c1, while second-stage SCI information is delivered either entirely to the PC5 RRC configuration or partially to region 10c2. 【0081】 When comparing this embodiment in Figure 7a, which uses an RRC configuration, for example, PC5-RRC, for transmitting control information, it should be noted that one of the main assumptions is that the frame structure must consist of a control area 10c and a data area 12d. In cases where a data-only time slot or standalone PSSCH exists, the method shown in Figure 7a can be used. Here, various variations can be distinguished. 【0082】 According to the embodiment, initial control information is sent on the first stage 10c1 of the SCI in the preceding format (i.e., the embodiment in Figure 5b or Figure 6b) or within the same time slot as the transmitted data (i.e., the embodiment in Figure 5a or Figure 6a). The first stage SCI 10c1 is sent on the time slot t1 in which the control region is defined. The remaining control information is UE-specific and is sent to each individual RX UE via PC5-RRC to handle the data transmitted within the standalone PSSCH time slot. 【0083】 According to another embodiment in Figure 7b, initial control information is transmitted on the first stage 10c1 of the SCI in the preceding format (i.e., the embodiment in Figure 5b or Figure 6b) or within the same time slot as the transmitted data (i.e., the embodiment in Figure 5a or Figure 6a). The remaining control information can be transmitted on the second stage SCI 10c2, but to reduce the size of the second stage SCI 10c2, the global parameters used can also be transmitted on the PC5-RRC. In this case, the time slot defines the control region. 【0084】 According to one embodiment starting from this second case, the size of the second-stage SCI 10c2 is gradually reduced over retransmissions, so that, for example, the 10c2 at t3 is smaller than the 10c2 at t1. In this case, the remaining information can be sent via the PC5-RRC. By the end of retransmission, the data can be sent without the second-stage SCI (on a standalone PSSCH), as shown by the timeframe t5 in Figure 7c. 【0085】 According to the embodiment, the base station can use the principles discussed above. In this case, the RRC configuration is a so-called Uu-RRC, where the timeframe structure is used for the uplink or downlink between the base station and the UE, rather than belonging to the sidelink timeframe structure used in the embodiment described above. In this case, the base station also directly sends detailed information about data transmission to the RX UE via the Uu-RRC. However, it is beneficial to transmit the first stage SCI 10c1 because other UEs can recognize upcoming / ongoing transmissions, which is important when both Mode 1 UEs and Mode 2 UEs share the same resource pool. 【0086】 Therefore, another embodiment provides a communication system comprising one or more base stations and a plurality of UEs, wherein the communication comprises one or more frames, each having a control area and a data area. Here, control information belonging to a first control area is transmitted within the control area as a first control area of ​​the control area, and control information belonging to a second control area is transmitted or partially transmitted using Uu-RRC. 【0087】 The following discusses further examples related to the embodiments described above. 【0088】 Some of the embodiments described above refer to vehicles in a connected mode, also known as a Mode 1 configuration or a Mode 3 configuration, or vehicles in an idle mode, also known as a Mode 2 configuration or a Mode 4 configuration. However, the present invention is not limited to V2V or V2X communication, but is also applicable to mobile or stationary users of non-vehicles performing any inter-device communication, such as sidelink communication via a PC5 interface. Furthermore, the embodiments of the present invention described above can be used in such scenarios. 【0089】 According to the embodiment, the wireless communication system may include a terrestrial network, a non-terrestrial network, or a network or network segment that uses an airborne vehicle or spaceborne vehicle as a receiver, or a combination thereof. 【0090】 According to the embodiment, the receiver may comprise one or more of any other network-connected item or device that enables an item / device to communicate using a wireless communication system, such as a mobile or fixed terminal, an IoT device, a ground vehicle, an aerial vehicle, a drone, a building, or a sensor or actuator. According to the embodiment, the transmitter may comprise one or more of any macrocell base station or small cell base station, or a spaceborne vehicle such as a satellite vehicle or space vehicle, or an airborne vehicle such as an unmanned aerial vehicle system (UAS), such as a moored UAS, a lighter than air UAS (LTA), a heavy than air UAS (HTA), and a high-altitude UAS platform (HAP), or any transmit / receive point (TRP) that enables a network-connected item or device to communicate using a wireless communication system. 【0091】 It should be noted that the above embodiments are applicable to vehicle communication systems, such as V2X, as seen in the context of cellular (e.g., 3G, 4G, 5G, or beyond) or ad-hoc communication networks. 【0092】 While some aspects of the concepts described have been explained within the context of an apparatus, it is clear that these aspects also represent descriptions of corresponding methods, in which case a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described within the context of a method step also represent descriptions of corresponding blocks, items, or features of a corresponding apparatus. 【0093】 Various elements and features of the present invention can be implemented in the form of hardware using analog and / or digital circuits, in the form of software, through the execution of instructions by one or more general-purpose or dedicated processors, or as a combination of hardware and software. For example, embodiments of the present invention can be implemented in the environment of a computer system or another processing system. Figure 8 shows an example of a computer system 600. The steps of a unit or module and the method carried out by these units can be performed on one or more computer systems 600. The computer system 600 includes one or more processors 602, such as a dedicated digital signal processor or a general-purpose digital signal processor. The processors 602 are connected to a communication infrastructure 604, such as a bus or network. The computer system 600 includes main memory 606, for example, random access memory (RAM), and secondary memory 608, for example, a hard disk drive and / or a removable storage drive. The secondary memory 608 can enable computer programs or other instructions to be loaded into the computer system 600. The computer system 600 may further include a communication interface 610 that enables software and data to be transferred between the computer system 600 and external devices. Communication can be in the form of electronic signals, electromagnetic signals, optical signals, or other signals that can be handled by a communication interface. Wires or cables, optical fibers, telephone lines, cellular telephone links, RF links, and other communication channels 612 can be used for communication. 【0094】 The terms “computer program medium” and “computer-readable medium” are used to generally refer to tangible storage media, such as removable storage units or hard disks installed within hard disk drives. These computer program products are means for providing software to the computer system 600. The computer program, also called computer control logic, is stored in main memory 606 and / or secondary memory 608. The computer program may be received via the communication interface 610. When executed, the computer program enables the computer system 600 to implement the present invention. Specifically, when executed, the computer program enables the processor 602 to implement the processes of the present invention, such as in any of the methods described herein. Thus, such a computer program can represent a controller of the computer system 600. If the present disclosure is implemented using software, the software may be stored within the computer program product and loaded into the computer system 600 using an interface such as a removable storage drive or the communication interface 610. 【0095】 Implementation in hardware or software may be carried out using a digital storage medium on which electronically readable control signals are stored, such as cloud storage, floppy disks, DVDs, Blu-rays, CDs, ROMs, PROMs, EPROMs, EEPROMs, or flash memory, which cooperate (or can cooperate) with a programmable computer system to carry out the respective methods. Thus, the digital storage medium may be computer-readable. 【0096】 Some embodiments of the present invention include a data carrier having electronically readable control signals that can cooperate with a programmable computer system so that one of the methods described herein is carried out. 【0097】 Generally, embodiments of the present invention can be implemented as a computer program product comprising program code, which is operable to perform one of the methods when the computer program product is executed on a computer. The program code may be stored, for example, on a machine-readable carrier. 【0098】 Other embodiments include a computer program stored on a machine-readable carrier for carrying out one of the methods described herein. In other words, one embodiment of the method of the present invention is a computer program having program code for carrying out one of the methods described herein when the computer program is executed on a computer. 【0099】 Accordingly, a further embodiment of the method of the present invention comprises a computer program for carrying out one of the methods described herein, i.e., a data carrier (or digital storage medium or computer-readable medium) on which the computer program for carrying out one of the methods described herein is recorded. Accordingly, a further embodiment of the method of the present invention is a data stream or signal sequence representing a computer program for carrying out one of the methods described herein. The data stream or signal sequence may be configured to be transmitted, for example, via a data communication connection, for example, via the Internet. A further embodiment comprises processing means configured or adapted to carry out one of the methods described herein, e.g., a computer or a programmable logic device. A further embodiment comprises a computer on which the computer program for carrying out one of the methods described herein is installed. 【0100】 In some embodiments, a programmable logic device (e.g., a field-programmable gate array) can be used to carry out some or all of the functions of the methods described herein. In some embodiments, a field-programmable gate array can cooperate with a microprocessor to carry out one of the methods described herein. Generally, the methods are preferably carried out by any hardware device. 【0101】 The embodiments described above are merely illustrative of the principles of the present invention. Modifications and variations of the configurations and details described herein will be obvious to those skilled in the art. Therefore, it is intended that the invention be limited only by the scope set forth in the claims that immediately follow, and not by the specific details presented in the description and explanation of the embodiments herein. 【0102】 List of acronyms and symbols V2X Vehicle-to-Everything 3GPP (Registered Trademark) Third Generation Partnership Project D2D (Digital-to-Digital) ITS (Intelligent Transport Services) FR1, FR2 Frequency range specification BS base station eNB Evolved Node B (3G base station) UE User Equipment SL Sidelink V2V Vehicle-to-Vehicle SCS subcarrier spacing RB resource block PSCCH Physical Sidelink Control Channel PSSCH Physical Sidelink Shared Channel TTI transmission time interval SCI Sidelink Control Information DCI Downlink Control Information CP cyclic prefix BWP bandwidth portion CORESET Control Resource Set USS UE specific search space CSS common search space RP Resource Pool M1 Mode 1 M2 Mode 2 M3 Mode 3 (LTE V2X) M4 Mode 4 (LTE V2X) [Explanation of symbols] 【0103】 1. Frame structure, side link structure 10c control region 10c1 First control area, first stage, control section, first stage SCI, control area 1, second stage SCI, first area, first stage SCI information 10c2 Second control area, second stage, second control section, second stage SCI, control, control area 2 12d Data area, data portion, first transmission, data, data retransmission 14p1 Reference number, pointer 14p1' pointer 14p2 Second pointer 600 Computer Systems 602 Processors 604 Communication Infrastructure 606 Main Memory 608 Secondary Memory 610 Communication Interface 612 Communication Channel t1 timeframe, time slot t2 timeframe, time slot t3 time slot, time frame T4 timeframe, slot t5 time slot, time frame t6 timeframe, slot

Claims

[Claim 1] A wireless communication system, Equipped with multiple user devices configured for sidelink communication, Sidelink communication comprises one or more sidelink frames, each having a control area and a data area. A wireless communication system in which control information belonging to a first control area is transmitted within the control area, and control information belonging to a second control area is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration. [Claim 2] The wireless communication system according to claim 1, wherein control information belonging to the second control area is partially transmitted as the second control area of ​​the control area. [Claim 3] The wireless communication system according to claim 1 or 2, wherein the first control area is transmitted using any of the sidelink frames prior to the sidelink frame used for sidelink transmission of the packet data area, or together with the sidelink transmission of the packet data area. [Claim 4] The wireless communication system according to any one of claims 1 to 3, wherein the second control region is transmitted using one or more subsequent time sidelink frames. [Claim 5] The size for transmitting the second control region is gradually reduced, or The wireless communication system according to claim 4, wherein the amount of control information belonging to the second control area and transmitted using the second control area is reduced, and the amount of control information belonging to the second control area and transmitted using a Layer 2 PC5-RRC configuration is increased, or the amount of control information belonging to the second control area and transmitted using the second control area is increased, and the amount of control information belonging to the second control area and transmitted using a Layer 2 PC5-RRC configuration is reduced. [Claim 6] The wireless communication system according to any one of claims 1 to 5, wherein the second control region is transmitted using a sidelink frame prior to the sidelink frame used for the sidelink transmission of the packet, or together with the sidelink transmission of the packet. [Claim 7] The first control region includes and / or information that points to the second control region, or the control information belonging to the second control region, which is transmitted or partially transmitted using the Layer 2 PC5-RRC configuration. The control information belonging to the second control area, which is transmitted or partially transmitted as the second control area of ​​the control area, includes information that points to the second control area of ​​a subsequent sidelink frame, or that points to the control information belonging to the second control area, which is transmitted or partially transmitted using the Layer 2 PC5-RRC configuration, and / or The wireless communication system according to any one of claims 1 to 6, wherein the second control area includes information relating to one or more data transmission resource locations of a packet. [Claim 8] A wireless communication system according to any one of claims 1 to 7, wherein the transmission of a packet uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location across one or more subsequent sidelink frames. [Claim 9] The wireless communication system according to any one of claims 1 to 8, wherein the control information belonging to the first control area and / or the control information belonging to the second control area is control information transmitted by one or more base stations. [Claim 10] The wireless communication system according to claim 9, wherein the information belonging to the second control area is transmitted using an RRC configuration via a UU link rather than the RRC configuration via a PC5 link. [Claim 11] The wireless communication system according to any one of claims 1 to 10, further comprising one or more base stations. [Claim 12] The aforementioned user device Mobile devices, or Fixed terminal, or Cellular IoT-UE, or Vehicle UE, or IoT or Narrowband IoT, NB IoT devices, Ground base station vehicle, or Aircraft vehicles, or drone, or Mobile base station, or Roadside unit, or A building, or Any other item or device with network connectivity that enables the item / device to communicate using a wireless communication network, such as a sensor or actuator. It comprises one or more of the following: A base station is a macrocell base station, or Small cell base station, or The central unit of the base station, or A distributed unit of a base station, or Roadside unit, or UE, or Remote radiohead, or AMF, or SMF, or Core network unit, or Network slices, as seen in the context of NR or 5G core, or Any transmit / receive point TRP that enables a network-connected item or device that communicates using a wireless communication network to communicate using the said wireless communication network, A wireless communication system according to any one of claims 1 to 11, comprising one or more of the above. [Claim 13] The wireless communication system according to any one of claims 1 to 12, wherein the sidelink frame comprises a transmission time interval, i.e., a fixed interval for which the device reserves resources, such as a sidelink subframe, TTI, slots, and / or minislots. [Claim 14] The wireless communication system according to any one of claims 1 to 13, wherein the control domain comprises a first control domain and a second control domain, the first control domain and the second control domain are defined in the frequency domain and the time domain, and the first control domain differs from the second control domain in frequency and / or time. [Claim 15] A user device for a wireless communication system having multiple user devices configured for sidelink communication, Sidelink communication comprises one or more sidelink frames, each having a control area and a data area. A user device in which control information belonging to a first control area is transmitted within the control area as the first control area of ​​the control area, and control information belonging to a second control area is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration. [Claim 16] The user device according to claim 15, wherein the control region comprises a first control region and a second control region, the first control region and the second control region are defined in the frequency region and the time region, and the first control region differs from the second control region in frequency and / or time. [Claim 17] The user device according to claim 15 or 16, wherein control information belonging to the second control area is partially transmitted as the second control area of ​​the control area. [Claim 18] The user device according to any one of claims 15 to 17, wherein the first control region is transmitted using any of the sidelink frames prior to the sidelink frame used for sidelink transmission of the packet data region, or together with the sidelink transmission of the packet data region. [Claim 19] The user device according to any one of claims 15 to 18, wherein the second control region is transmitted using one or more subsequent time sidelink frames. [Claim 20] The size for transmitting the second control region is gradually reduced, or The user device according to claim 19, wherein the amount of control information belonging to the second control area and transmitted using the second control area is reduced, and the amount of control information belonging to the second control area and transmitted using the Layer 2 PC5-RRC configuration is increased, or the amount of control information belonging to the second control area and transmitted using the second control area is increased, and the amount of control information belonging to the second control area and transmitted using the Layer 2 PC5-RRC configuration is reduced. [Claim 21] The user device according to any one of claims 15 to 20, wherein the second control region is transmitted using a sidelink frame prior to the sidelink frame used for the sidelink transmission of the packet, or together with the sidelink transmission of the packet. [Claim 22] The first control region includes and / or information that points to the second control region, or the control information belonging to the second control region, which is transmitted or partially transmitted using the Layer 2 PC5-RRC configuration. The control information belonging to the second control area, which is transmitted or partially transmitted as the second control area of ​​the control area, includes information that points to the second control area of ​​a subsequent sidelink frame, or that points to the control information belonging to the second control area, which is transmitted or partially transmitted using the Layer 2 PC5-RRC configuration, and / or The user device according to any one of claims 15 to 21, wherein the second control area includes information relating to one or more data transmission resource locations of a packet. [Claim 23] A user device according to any one of claims 15 to 22, wherein the transmission of a packet uses two or more data transmission resource locations within a single sidelink frame, and / or the packet is transmitted within a data transmission resource location across one or more subsequent sidelink frames, or multiple versions of the packet are transmitted within a data transmission resource location across one or more subsequent sidelink frames. [Claim 24] The user device according to any one of claims 15 to 23, wherein the control information belonging to the first control area and / or the control information belonging to the second control area is transmitted by one or more base stations.

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