Wireless communications system with certain sidelink frame structures

Abstract

According to embodiments (main aspects), a wireless communication system comprises one or more base stations and a plurality of user equipments, UEs. The plurality of user equipments are configured for sidelink communication (e.g., sidelink transmission), wherein the sidelink communication comprises one or more sidelink frames, each sidelink frame having a control region and a data region, wherein the control region comprises a first control region and a second control region, wherein the first control region comprises basic information about a sidelink transmission of a packet, and the second control region comprises information about a data transmission resource location or a plurality of data transmission resource locations of the packet. Here, the transmission of the packet uses more than a single data transmission resource location in a single sidelink frame, and / or wherein the packet is to be transmitted in a plurality of data transmission resource locations across one or more subsequent sidelink frames, or wherein a plurality of versions of the packet are to be transmitted in a plurality of data transmission resource locations across one or more subsequent sidelink frames.

Description

Technical Field

[0001] This application relates to the field of wireless communication networks or systems, and more specifically, to sidelink communication of user equipment in such communication systems. Embodiments relate to a novel radio sidelink frame structure, NR SL FS. Other embodiments relate to communication systems, and corresponding UEs, base stations, and methods. Preferred embodiments relate to NRV2X using two-stage SCI to enable slot aggregation. Background Technology

[0002] Figure 1a This is a schematic representation of an example of a terrestrial wireless network 100, such as... Figure 1a As shown, the terrestrial wireless network 100 includes a core network 102 and one or more radio access networks RAN1, RAN2...RAN N . Figure 1b Radio Access Network (RAN) n An illustrative representation of an example, a radio access network (RAN). n This may include one or more base stations gNB1 to gNB5, each serving a specific area around the base station schematically represented by corresponding cells 1061 to 1065. Base stations are provided to serve users within the cell. The term base station (BS) refers to gNB in ​​5G networks, eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply BS in other mobile communication standards. Users may be fixed or mobile devices. The wireless communication system may also be accessed by mobile or fixed IoT devices connected to the base station or connected to the user. Mobile or IoT devices may include: physical devices; ground-based 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 or devices embedded with electronics, software, sensors, actuators, etc., and network connections enabling these devices to collect and exchange data over existing network infrastructure. Figure 1b A schematic view of only 5 cells is shown; however, RAN n It can include more or fewer of these cells, and RAN n It can also include only one base station. Figure 1b Two users, UE1 and UE2, are shown in cell 1062 and are served by base station gNB2, also referred to as user equipment (UE). Another user, UE3, is shown in cell 1064 and is served by base station gNB4. Arrows 1081, 1082, and 1083 schematically represent uplink / downlink connections used for transmitting data from users UE1, UE2, and UE3 to base stations gNB2 and gNB4, or for transmitting data from base stations gNB2 and gNB4 to users UE1, UE2, and UE3. Furthermore, Figure 1bTwo IoT devices 1101 and 1102 in the cell 1064 are shown, which can be stationary or mobile devices. The IoT device 1101 accesses the wireless communication system via the 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 arrow 1122. The individual base stations gNB1 to gNB5 can be connected, e.g., via the S1 interface, to the core network 102, which is schematically represented by the arrows pointing to “core” in Figure 1b The core network 102 can be connected to one or more external networks. Furthermore, some or all of the individual base stations gNB1 to gNB5 can be connected, e.g., via the S1 or X2 interface or XN interface in NR, to each other via respective backhaul links 1161 to 1165, which are schematically represented by the arrows pointing to “gNBs” in Figure 1b

[0003] For data transmission, a physical resource grid can be used. The physical resource grid can comprise a grid of resource elements, various physical channels and physical signals being mapped to the resource elements. For example, the physical channels can include: physical downlink, uplink and sidelink shared channels (PDSCH, PUSCH, PSSCH), also known as downlink, uplink and sidelink payload data, carrying user-specific data; a physical broadcast channel (PBCH) carrying for example a master information block (MIB) and secondary information block (SIB); physical downlink, uplink and sidelink control channels (PDCCH, PUCCH, PSCCH) carrying for example downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI), etc. For the uplink, the physical channels can further include the physical random access channel (PRACH or RACH) used by the UE to access the network after synchronizing and obtaining the MIB and SIB by the UE. The physical signals can comprise reference signals or symbols (RS), synchronization signals, etc. The resource grid can comprise a frame or radio frame of a certain duration, e.g., 10ms, in the time domain and having a given bandwidth in the frequency domain. The frame can have a certain number of subframes of a predetermined length. Each subframe can include one or more slots of, e.g., 12 or 14 OFDM symbols depending on the cyclic prefix (CP) length. A frame can also consist of a smaller number of OFDM symbols, e.g., when using shortened transmission time intervals (sTTIs) or mini-slots / non-time-slot based frame structures comprising only a few OFDM symbols.

[0004] ​The wireless communication system can be any single-frequency or multi-carrier system using frequency division multiplexing, such as orthogonal frequency division multiplexing (OFDM) systems, orthogonal frequency division multiple access (OFDMA) systems, or any other IFFT-based signal with or without CP, such as DFT-s-OFDM. Other waveforms, such as non-orthogonal waveforms used for multiplexing, can be used, for example, filter bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), or universal filtered multicarrier (UFMC). The wireless communication system can operate, for example, according to the LTE-Advanced pro standard or the new 5G or NR radio standards.

[0005] Figure 1a and Figure 1b The wireless network or communication system shown can be a heterogeneous network with different overlapping networks, such as a macro cell network in which each macro cell includes macro base stations (e.g., base stations gNB1 to gNB5), and a network of small cell base stations. Figure 1b (not shown in the image), such as femtocells or picocells.

[0006] In addition to the aforementioned terrestrial wireless networks, 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 systems can be referenced in the above context. Figure 1a and Figure 1b The described ground systems operate in a similar manner (e.g., according to the LTE-Advanced Pro standard or the new 5G or NR radio standards).

[0007] In mobile communication networks, for example, as referenced above Figure 1a and Figure 1b In the described network (such as an LTE or 5G / NR network), there may be UEs that communicate directly with each other via one or more sidelink (SL) channels (e.g., using a PC5 interface). UEs that communicate directly with each other via sidelinks can include: vehicles communicating directly with other vehicles (V2V communication), vehicles communicating with other entities in the wireless communication network (V2X communication), such as roadside entities like traffic lights, traffic signs, or pedestrians. Other UEs may not be vehicle-related 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, these two 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, these two UEs can communicate directly with each other at a base station (such as...). Figure 1bThe two UEs are located within the coverage area of ​​one of the base stations depicted in the image. 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 in each other's coverage area. Figure 1b It doesn't mean within one of the cells described in the text, but rather means these UEs:

[0009] - It may not be connected to the base station, for example, they are not in an RRC connected state, causing the UE not to 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 sidelink resource allocation configuration or assistance to the UE, and / or

[0011] - May connect to base stations that may not support NR V2X services, such as GSM, UMTS, LTE, and NR base stations that do not support V2X services.

[0012] Another scenario is called the "partial coverage" scenario. In this scenario, one of the two UEs that communicate with each other via a side link is served by the base station, while the other UE is not served by the base station.

[0013] When considering two UEs communicating directly with each other via a side link (e.g., PC5), one of the UEs can also connect to the BS and relay information from the BS to the other UE via the side link interface. Relaying can be performed 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 the side link can be decoupled using time slots different from those in a Time Division Duplex (TDD) system.

[0014] Figure 2 This is a schematic representation of a scenario where two UEs communicating directly with each other are both within the coverage area of ​​a base station. The base station gNB has a coverage area schematically represented by circle 200, which essentially corresponds to... Figure 1b The cell is schematically represented in the diagram. UEs communicating directly with each other include a first vehicle 202 and a second vehicle 204, both within the coverage area 200 of the base station gNB. Both vehicles 202 and 204 are 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. The gNB allocates resources for V2V communication via sidelinks. This configuration is also known as Mode 1 configuration in NR V2X, or Mode 3 configuration in LTE V2X.

[0015] Figure 3This is an illustrative representation of a scenario where the UE is outside the coverage area of ​​the base station; that is, the individual UEs communicating directly with each other are not connected to the base station, although they may be physically located within a cell of the wireless communication network. Three vehicles 206, 208, and 210 are shown communicating directly with each other via a side link (e.g., using a PC5 interface). Scheduling and / or interference management for V2V services is based on algorithms implemented between the vehicles. This configuration is also known as Mode 2 configuration in NR V2X, or Mode 4 configuration in LTE V2X. As described above, this is a scenario outside coverage. Figure 3 The scenario described here does not imply that the corresponding Mode 4 UE is outside the base station's coverage area of ​​200, but rather that the corresponding Mode 4 UE is not served by the base station, is not connected to the 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, the following situations may exist: Figure 2 In the coverage area 200 shown, in addition to mode 3 UEs 202 and 204, there are also mode 4 UEs 206, 208 and 210.

[0016] In the above scenario of vehicular user equipment (UE), multiple such UEs can form a UE group, or simply a group, and communication within or between group members can be performed via a sidelink interface (such as a PC5 interface) between UEs. Multiple such groups can exist simultaneously within a wireless communication network or its cell. Although it is noted that communication within a group is via a sidelink, this does not preclude some or all of the group members from communicating with other entities outside the group via a base station or via a sidelink, provided the group or at least some of its members are within coverage area. For example, the above scenario using vehicular user equipment can be applied in the transportation industry, where multiple vehicles equipped with vehicular user equipment can be grouped together, for example, through a remote driving application.

[0017] Other use cases where multiple user equipments (UFOs) can be grouped together for sidelink communication with each other include, for example, factory automation and power distribution. In the case of factory automation, multiple mobile or stationary machines within a factory can be equipped with UFOs and grouped together for sidelink communication, such as for controlling machine operation, like robot motion control. In the case of power distribution, entities within a power distribution grid can be equipped with corresponding UFOs, which can be grouped together within a certain area of ​​the system to communicate with each other via sidelink communication, thereby allowing for system monitoring and handling of power distribution grid failures and outages.

[0018] Of course, in the above use cases, sidelink communication is not limited to communication within a group. Instead, sidelink communication can occur between any UE, such as between any pair of UEs.

[0019] Note that the information in the above sections is only used 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.

[0020] Starting with the aforementioned prior art, for wireless communication systems in which multiple users can perform sidelink communication, an improved frame structure may be required for such sidelink communication. Attached Figure Description

[0021] Embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:

[0022] Figure 1a and Figure 1b A schematic representation of an example of a wireless communication system is shown;

[0023] Figure 2 This illustration shows a schematic representation of a scenario where UEs communicating directly with each other are within the coverage area of ​​a base station;

[0024] Figure 3 This illustrates a scenario where UEs communicating directly with each other are not within the coverage area of ​​the base station, i.e., not connected to the base station;

[0025] Figure 4 An example of a resource pool defined across time and frequency is shown;

[0026] Figure 5a An exemplary sidelink frame structure for illustrating an embodiment is shown, in which a first control region and a second control region are arranged together with a data region in the same time slot;

[0027] Figure 5b A schematic sidelink frame structure for illustrating an embodiment is shown, in which the first control region and the second control region are arranged in different time slots;

[0028] Figure 6a The illustration schematically shows the relationship between the embodiment and Figure 5a The side link frame structure shown is equivalent to the side link frame structure, wherein the first control region is repeated;

[0029] Figure 6b The illustration schematically shows a parallel with another embodiment. Figure 5b The side link frame structure is similar to the side link frame structure, in which the first control region is repeated;

[0030] Figure 7a to Figure 7c The time frame structure according to an embodiment using an alternative channel (e.g., PC5-RRC or Uu-RRC) is illustrated schematically; and

[0031] Figure 8An 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

[0032] 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 designated reference numerals.

[0033] The initial Vehicle-to-Everything (V2X) specifications were included in Release 14 of the 3GPP standard. Resource scheduling and allocation have been modified to meet V2X requirements, while the original Device-to-Device (D2D) communication standard has been used as the basis for the design. Releases 15 (also known as Enhanced V2X or eV2X) and 16 of the LTE V2X standard, as well as the first releases of 3GPP and 5G NR V2X, will focus on V2X slot aggregation, respectively. NR V2X has identified a set of use cases to be implemented, and one of the key areas of concern for these use cases is guaranteeing a certain Quality of Service (QoS) for a given application.

[0034] On one hand, two-stage sidechain control information (SCI) can be advantageously used. The first stage is used to transmit basic information to the UE, which includes pointers to the second-stage SCI coupled with the corresponding data transmission. On the other hand, it addresses how to handle the aggregation of time slots for larger transmissions.

[0035] Since control regions are defined for time slots, the goal is to optimize the use of these control regions, especially for using time slot aggregation and for achieving maximum reliability in transmission.

[0036] According to an embodiment (main aspect), a wireless communication system may or may not include one or more base stations and multiple user equipment (UEs). Multiple UEs are configured for sidelink communication (e.g., sidelink transmission), wherein the sidelink communication includes one or more sidelink frames, each sidelink frame having a control region and a data region, wherein the control region includes a first control region and a second control region, wherein the first control region includes basic information about the sidelink transmission of packets, and the second control region includes information about data transmission resource locations or multiple data transmission resource locations of the packets. Here, packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or wherein packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames, or wherein multiple versions of packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames.

[0037] Regarding the wireless system, the base station may or may not exist, corresponding to scenarios within or outside the coverage area, or the UE's NR mode 1 and NR mode 2 operation.

[0038] 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.

[0039] Embodiments of the present invention are based on the principle that a control region can include two phases, wherein dedicated portions within a time frame can be reserved for each of the two phases / control regions. The second-phase SCI can include information pointing to one or more locations of data transmission (e.g., within the same time slot or subsequent time slots). Two-phase SCIs are particularly beneficial for NR V2X applications that accommodate time slot aggregation. This concept enables the provision of critical information within the SCI, regardless of whether each data transmission uses aggregated data resources or a single data resource. In cases where multiple data resources are aggregated, the packets to be transmitted span more than a single time slot. The following is the content of the control information transmitted in the two control regions (within these aggregated time slots).

[0040] Note that, according to the embodiments, one or more subsequent sidelink frames may be located within consecutive or non-consecutive sidelink frames for packet transmission of a given UE. This means, for example, that one or more additional sidelink frames may not be arranged between two subsequent sidelink frames used for said sidelink transmission, wherein the sidelink frames in between, if present, may be used by other UEs.

[0041] Two basic scenarios are distinguished. In the first scenario, the first control region and the second control region are transmitting using the same sidelink frames. Here, for example, when transmitting redundant versions of the same packets, the two control regions may also transmit together with a portion of the data transmission (e.g., the first part of the packet) or the first version of the data transmission.

[0042] According to an embodiment, the first control region may include information pointing to a second control region arranged in the same sidelink frame and a second control region in each of one or more subsequent sidelink frames.

[0043] According to another embodiment, a sidelink transmission performed by a UE may use one or more subsequent sidelink frames, wherein the first control region of the one or more subsequent sidelink frames is idle or will be used by other UEs or multiple UEs.

[0044] Note that, considering the specific UE of the communication system, the control area is idle. Other UEs are free to use the idle first control area, for example, for preemption or resource reservation.

[0045] According to an embodiment, sidelink transmission uses one or more subsequent sidelink frames, wherein information of a first control region transmitted using a first sidelink frame is retransmitted within the first control region of one or more subsequent sidelink frames. The first control region includes information pointing to a second control region in another one or more subsequent sidelink frames.

[0046] According to another embodiment, sidelink transmission may use one or more subsequent sidelink frames, wherein a second control region of the one or more subsequent sidelink frames includes information about the data transmission resource location of the corresponding sidelink frame or about multiple data transmission resource locations.

[0047] According to the second scenario (e.g., embodiment), the first control region and the second control region are transmitted using different sidelink frames (e.g., subsequent sidelink frames), where "subsequent" means located in consecutive or non-consecutive sidelink frames. For example, the first control region is transmitted using a first sidelink frame, and the second control region is transmitted using a second subsequent sidelink frame. Here, according to the embodiment, the first control information may include information pointing to the second control region or the second control region in the corresponding sidelink frame or subsequent sidelink frame.

[0048] According to an embodiment, a second control region belonging to a side link frame is left idle by the UE performing a given transmission, and can be used by other UEs or multiple UEs to transmit the first control region within that side link frame.

[0049] According to an embodiment, sidelink transmission uses one or more subsequent sidelink frames, each of the one or more subsequent sidelink frames including a corresponding second control region. Alternatively, the corresponding second control region of the one or more subsequent sidelink frames includes information pointing to a data region.

[0050] According to an embodiment, the corresponding first control region is retransmitted within one or more subsequent sidelink frames. Alternatively, the corresponding first control region may include information pointing to one or more second control regions in another one or more subsequent sidelink frames.

[0051] In conjunction with all the above embodiments, it should be noted that, according to another embodiment, the first control region may include information about the destination ID of the RX UE. Alternatively, it may include information about the number of data transmission resource locations and / or the number of sidelink frames for multiple data transmission resource locations and / or information pointing to a corresponding second control region transmitted using subsequent sidelink frames.

[0052] An embodiment provides a user equipment (UE) for a wireless communication system, which may or may not have one or more base stations and has multiple UEs configured for sidelink communication. Sidelink communication includes one or more sidelink frames, each sidelink frame having a control region and a data region. The control region includes a first control region and a second control region. The first control region includes basic information about the sidelink transmission of packets, and the second control region includes information about data transmission resource locations or multiple data transmission resource locations for the packets. Here, packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames, or multiple versions of packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames.

[0053] An embodiment provides a base station for a wireless communication system having one or more base stations and multiple user equipment (UEs), wherein the multiple UEs are configured for sidelink communication, wherein the sidelink communication includes one or more sidelink frames, each sidelink frame having a control region and a data region. The control region includes a first control region and a second control region, wherein the first control region includes basic information about the sidelink transmission of packets, and the second control region includes information about data transmission resource locations or multiple data transmission resource locations of the packets. Packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or wherein packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames, or wherein multiple versions of packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames.

[0054] This embodiment provides a method for sidelink communication in a wireless communication system, which may or may not have one or more base stations and has multiple user equipment (UEs), wherein the multiple UEs are configured for sidelink communication. The sidelink communication includes one or more sidelink frames, each sidelink frame having a control region and a data region. The control region includes a first control region and a second control region, wherein the first control region includes basic information about the sidelink transmission of packets, and the second control region includes information about data transmission resource locations or multiple data transmission resource locations of the packets. Packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or wherein packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames, or wherein multiple versions of packets will be transmitted across multiple data transmission resource locations spanning one or more subsequent sidelink frames.

[0055] Note that at a given Transmission Time Interval (TTI) or subframe, the transmitting UE broadcasts a Side Link Control Information (SCI) in the control channel, followed by data in the same subframe. The SCI points to a resource within the subframe on which data will be transmitted, and the receiving UE listens on the control subchannel so that when it does receive the SCI, it knows where to receive data from.

[0056] According to an embodiment (additional aspect), a wireless communication system includes: zero or one or more base stations; and a plurality of user equipment (UEs), wherein the plurality of UEs are configured for (sidelink) communication. The (sidelink) communication includes one or more (sidelink) frames, each (sidelink) frame 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. Control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 (PC5-)RRC configuration.

[0057] The implementation of this aspect is based on the following finding: information that is typically transmitted using the second control area (see above) can be transmitted entirely or partially via a higher-level signaling, here being a Layer 2 PC5-RRC configuration or PC5 (PC5 Radio Resource Control Configuration, also known as Sidelink Radio Resource Control Configuration) sent via a sidelink.

[0058] Note 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 with a reduced size are used together with a Layer 2 PC5-RRC configuration. This is advantageous because the reduced-size second control region (reduced to zero according to an embodiment) allows more resources to be used for data transmission within the corresponding sidelink frame. Because the first control region is used within the corresponding sidelink frame, it can still indicate the corresponding sidelink communication.

[0059] According to an embodiment, control information belonging to the second control area is transmitted as the second control area portion of the control area.

[0060] According to an embodiment, the first control region is transmitted using a sidelink frame preceding the sidelink frame used for packet sidelink transmission or together with the packet sidelink transmission.

[0061] According to an embodiment, the second control region uses one or more subsequent time-side link frames for transmission.

[0062] According to an embodiment, the size of the second control region used for transmission gradually decreases. In other words, the amount of control information belonging to and transmitted using the second control region decreases, while the amount of control information belonging to the second control region and transmitted using the Layer 2 PC5-RRC configuration increases, and vice versa. This corresponding decrease or increase in the amount of control information belonging to the second control region occurs relative to the number of one or more subsequent time-side link frames. For example, the amount of control information transmitted in the second control region gradually decreases in each subsequent time-side link frame used for transmission.

[0063] According to an embodiment, the second control region is transmitted using a sidelink frame preceding the sidelink frame used for packet sidelink transmission or together with the packet sidelink transmission.

[0064] According to an embodiment, the first control region includes information pointing to: a second control region or information belonging to a second control region configured for transmission or partial transmission using Layer 2 PC5-RRC. Alternatively, the information belonging to a second control region configured for transmission or partial transmission as a control region includes information pointing to: a second control region or information belonging to a second control region configured for transmission or partial transmission using Layer 2 PC5-RRC; and / or wherein the second control region includes information regarding the data transmission resource location or multiple data transmission resource locations of a packet.

[0065] According to an embodiment, packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or wherein packets will be transmitted in data transmission resource locations across one or more subsequent sidelink frames, or wherein different versions of packets will be transmitted in data transmission resource locations across one or more subsequent sidelink frames.

[0066] According to another embodiment, the above principle using RRC configuration can be applied to communication between the base station and the UE.

[0067] Therefore, this embodiment provides a communication system in which control information is to be transmitted by one or more base stations. Here, information belonging to the second control area is transmitted via RRC configuration on the Uu link instead of RRC configuration on the PC5 link.

[0068] Another embodiment provides a user equipment (UE) for a wireless communication system, which may or may not have one or more base stations and has multiple UEs configured for (sidelink) communication. The (sidelink) communication includes 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, while control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 PC5-RRC configuration (typically RRC).

[0069] Another embodiment provides a base station for a wireless communication system having one or more base stations and multiple user equipment (UEs), wherein the multiple UEs are configured for (sidelink) communication. The (sidelink) communication includes one or more (sidelink) frames, each (sidelink) frame 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.

[0070] 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 has multiple user equipment (UEs) configured for (sidelink) communication. The (sidelink) communication includes 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, and control information belonging to a second control region is transmitted or partially transmitted using a Layer 2 (PC5-)RRC configuration.

[0071] Regarding all the above embodiments / aspects, it should be mentioned that, according to the embodiments, the UE may include one or more of the following: a mobile terminal, or a fixed terminal, or a cellular IoT-UE, or a vehicle-mounted UE, or an IoT or narrowband IoT (NB-IoT) device, or a ground base station vehicle, or an aircraft, or a drone, or a mobile base station, or a roadside unit, or a building, or any other article or device, providing a network connection that enables the article / device to communicate using a wireless communication network, such as a sensor or actuator, and 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, or a UE, or a remote radio head, or an AMF, or an SMF, or a core network unit, or a network slice in an NR or 5G core context, or any transmit / receive point TRP that enables the article or device to communicate using a wireless communication network, the article or device providing a network connection for communicating using a wireless communication network.

[0072] According to an embodiment, a sidelink frame includes a transmission time interval, an interval for reserved resources of the device, such as a sidelink subframe, a TTI, a time slot, and / or a mini time slot.

[0073] Regarding the methods described above, it should be noted that these methods can be implemented by a computer. Therefore, the embodiments relate to a computer program for executing the instructions defined by the methods described above.

[0074] Note that all of the optional features mentioned above, which have already been discussed in the context of the communication system, can also be used in the corresponding device (UE or BS) or the corresponding method.

[0075] The embodiments will now be discussed in detail with reference to the accompanying drawings. The discussion is based on the assumption that the data packets to be transmitted need to span multiple time slots. Here, the first stage will inform the RX UE of the number of retransmissions to be performed and the location of the corresponding second-stage SCI in each retransmission. The second stage will contain information about the retransmission resource locations, where the second-stage SCI and data will be contained in the same time slot. We propose the following method to utilize the control area of ​​the two-stage SCI model and accordingly depict... Figure 5a to Figure 7c In the diagram.

[0076] According to a basic embodiment, the control channel includes a first control region and a second control region. This is, for example, by... Figure 5a As shown.

[0077] Figure 5a The design of frame structure 1, for example, to be used in NR V2X is shown. Figure 5aSix time frames, marked t1 to t6, are shown. Within each time frame 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 time frame / sidelink frame, there is a control region 10c and a data region 12d in each time slot. The control region 10c is divided into two phases 10c1 and 10c2 containing the SCI to be transmitted.

[0078] Sidelink structure 1 may, for example, include a resource portion having a time domain (frames t1 to t6) and a frequency domain (along which control regions 10c1, 10c2 and data portion 12d are arranged). The resource portion may also be referred to as a subchannel and is defined within the bandwidth portion (BWP).

[0079] As already noted, a distinction is made between the possibility that data packets can be transmitted within a single time slot or within a data area across different time slots without time slot aggregation (SOTA). Here, regarding Figure 5a This refers to the case where the first-stage SCI10C1 and the second-stage SCI 10C2 are transmitted within the same time slot with time slot aggregation (e.g., t1).

[0080] According to an embodiment, the first stage / first control region 10c1 may contain basic information, such as the destination ID of the RX UE. Furthermore, according to an embodiment, control region 10c1 may contain pointers to a second control region 10c2, or more specifically, pointers to one or more second control regions 10c2 arranged within subsequent time slots (here, time slots t3 and t5). These pointers are indicated by reference numeral 14p1. According to an embodiment, the second stage / second control region 10c2 may contain information about one or more data transmission resource locations for packets. This may also include pointers 14p2 pointing to corresponding data regions 12d. Since time slot aggregation is preferably used for packet transmission, the information contained in 10c2 may include one or more pointers 14p2 pointing to multiple data regions 12d in multiple time slots t1, t3, and t5. Note, of course, that the pointers 14p2 of control region 10c2 used for transmission in time slot t3 only include pointers to the data portions 12d of t3 and optionally t5. In other words, this means that when starting from the assumption of using time slot aggregation, the second stage 10c2 includes information about retransmission resource locations.

[0081] The following will discuss in detail the principle behind this, which includes optional elements:

[0082] The first phase SCI 10c1, the first of the second phase SCI 10c2, and the first transmission 12d are located in the same time slot, here time slot t1. In this case, there is no prior reservation for the (side link) transmission. The RX UE will know about the transmission through the first phase SCI 10c1, which points to the first of the second phase SCI 10c2, which in turn points to the first transmission 12d belonging to the data in time frame t1. In time slot t3, which is used for the second transmission, the control area for the first phase SCI (see 10c1) will remain idle and can be used by other UEs interested in reserving future transmissions. The second phase SCI 10c2 pointing to the data 12d in t3 will occupy the remaining portion of the time slot.

[0083] Note that, for example, data area 12d and control areas 10c1 and 10c2 of time frames t2, t4, or t6 are also idle and can therefore be used by other UEs. Time frames t2, t4, and t6 can be transmitted and used consecutively, with data area 12d and control areas 10c1 and 10c2 used for the transmission of the same packets.

[0084] about Figure 5b Another basic embodiment, according to which the first and second stage SCIs (see 10c1 and 10c2) can be transmitted in different time slots (e.g., t1 and t2).

[0085] As shown in the figure, the first control region 10c1 is transmitted within time frame t1, and the second control region 10c2 is transmitted within time frame t2. Within the same time frame t2, data region 12d is transmitted. Other data within data region 12d is transmitted during time frames t4 and t6. For example, each frame t4 and t6 may also include a corresponding second control region 10c2.

[0086] It can be seen that the first stage 10c1 and the second stage 10c2 are transmitted in different time slots t1 and t2, while the second control region 10c2 is also transmitted during t4 and t6. According to an embodiment, the first stage 10c1 contains basic information and a pointer 14p1 pointing to the corresponding second control region 10c2 within time frames t2, t4, and t6. The second stage may contain information about the location of retransmitted resources, as indicated by the second pointer 14p2. This pointer 14p2 may, for example, point to the corresponding data region 12d within the corresponding time frames t2, t4, and t6.

[0087] The details of this embodiment for different time slots used in the first and second phase SCIs will be discussed below. As described above, firstly, the first phase SCI is transmitted only once in the time slot, and subsequently (e.g., directly or with other frames in between) the first and initial transmissions of the second phase SCI are performed in a later time slot. In this case, the first phase SCI 10c1 is used as a resource reservation for an upcoming retransmission. The time slot used to transmit the first phase SCI will only occupy the control area of ​​the first phase SCI 10c1, and the remaining control area (10c2) and data area 12d can be used by other UEs or remain idle. The first phase SCI 10c1 will point to the second phase SCI 10c2 of time frame t2 (see pointer 14p1). This corresponds to the retransmission in future time slots t2 to t6. According to the embodiment, each of the future time slots used for sidelink transmissions (here, time slots t2, t4, and t6) will only contain the second phase SCI 10c2 and the corresponding data 12d. Note that in the second stage, SCI points to the corresponding data portion 12d of the time frames t2, t4, and t6.

[0088] Figure 6a Another variation is shown, which is usually based on Figure 5a The variation discussed in the context of [previous example] involves multiple transmissions of the first-stage SCI 10c1 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 includes all three regions: control region 1 10c1 (control region 2 10c2) and data region 12d. This approach is advantageous when the RX UE has missed the first instance of the first-stage SCI 10c1 (see time frame t1). If the RX UE misses the first instance of the first-stage SCI, rather than losing the transmission entirely, it 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 and allows the RX UE to receive packets.

[0089] Note that, according to an embodiment, the first-stage SCI 10c1 (e.g., t1) can point to a corresponding (subsequent second-stage SCI 10c2, e.g., subsequent second-stage SCI 10c2 for t1, t3, and t5), or according to another embodiment, it can also point to the first-stage SCI of a subsequent frame, e.g., 10c1 for t3 or t5. According to a preferred variant, the first instance of the first-stage SCI should indicate the presence of a duplicate in an upcoming time slot. This allows for the dropping of transmissions for other important transmissions (e.g., those with another high-priority reception or transmission). Alternatively, each second-stage SCI 10c2 can point to a subsequent time frame, e.g., 10c1 for t3, 10c2 for t3, or 12d for t3.

[0090] Figure 6b It shows that it is basically consistent with what has already been shown. Figure 5b Another embodiment of the method discussed in the context of this paper. Here, the first-stage SCI 10c1 is sent in advance for the first time (see time frame t1) and repeated over the duration of the retransmission (see time frame t5). Note that not every time frame is indicated by the control area 10c1 sent in advance to the corresponding time frame, as shown with respect to time frame t3. In other words, this means that 10c1 of t1 indicates 10c2 of t2 and 10c2 of t4, see pointer 14p1, (and, for example, 10c2 of t6 and 10c1 of t5, as shown by pointer 14p1'), where 10c1 of t5 indicates 10c2 of t6.

[0091] Figure 7a Another variation of how control information can be transmitted is illustrated. In this case, the control information is transmitted partly via time slot t1 as described above and partly via higher-layer signaling using an RRC configuration (e.g., level 2 PC5-RRC configuration). The PC5 RRC configuration is transmitted, for example, only for unicast communication and is carried on the PSSCH. Within each time slot, at least a data area 12d is defined, where only some time slots have reserved / used control areas 10c. Control area 10c may contain only the first control area 10c1, or it may contain both 10c1 and 10c2. Optionally, a control area 10c2 with a reduced size (including reduced to zero) may be used. This second control area 10c2 is shown by a dashed line.

[0092] According to an embodiment, control information is transmitted at least using a first region 10c1 and a PC5 RRC configuration. Depending on the implementation or current requirements, control region 10c2 or a portion thereof may also be used. For example, control region 10c1 carries first-stage SCI information 10c1, while second-stage SCI information is distributed entirely on the PC5 RRC configuration or partially on region 10c2.

[0093] In comparison Figure 7a When using this embodiment with RRC configuration (e.g., 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 region 10c and a data region 12d. In the presence of data-only slots or a separate PSSCH, it is possible to use... Figure 7a The method shown can be used to distinguish different variations.

[0094] According to the embodiment, in the first stage 10c1 of SCI, in an advanced manner (see...) Figure 5b or Figure 6b(see embodiment) or in the same time slot as the data to be transmitted (see embodiment) Figure 5a and 6a (Example) Initial control information is sent. The first phase SCI 10c1 is sent in time slot t1, which defines the control area. The remaining control information is UE-specific and can be sent to each individual RX UE via PC5-RRC, processing data to be sent in a separate PSSCH time slot.

[0095] according to Figure 7b Another embodiment, in the first stage 10c1 of SCI, is carried out in an advanced manner (see...). Figure 5b and Figure 6b (see embodiment) or in the same time slot as the data to be transmitted (see embodiment) Figure 5a and Figure 6a (In the example embodiment) Initial control information is sent. The remaining control information can be sent on the second-stage SCI 10c2; however, the global parameters to be used can also be sent on PC5-RRC to reduce the size of the second-stage SCI 10c2. In this case, the time slot has already defined the control region.

[0096] According to the embodiment starting from this second case, the size of the second-stage SCI 10c2 may also gradually decrease during retransmission; for example, the size of the 10c2 in t3 is smaller compared to the 10c2 in t1. The remaining information can then be sent via PC5-RRC. At the end of the retransmission, data can be sent without the second-stage SC1, as... Figure 7c The time frame t5 is shown (on a separate PSSCH).

[0097] According to the embodiments, the base station can use the above principles. In this case, the RRC configuration is the so-called Uu-RRC, where the time frame structure is not the sidelink time frame structure used in the above embodiments, but is used for the uplink or downlink between the base station and the UE. In this case, the base station also sends detailed information about data transmission directly to the RX UE via Uu-RRC. However, the first phase of transmission SCI 10c1 is beneficial because it allows other UEs to know about the upcoming / ongoing transmission, which is important when both Mode 1 UEs and Mode 2 UEs share the same resource pool.

[0098] Therefore, another embodiment provides a communication system including one or more base stations and multiple UEs, wherein the communication includes one or more frames, each frame having a control region and a data region. Here, control information belonging to a first control region is transmitted within the control region as a first control region, wherein control information belonging to a second control region is transmitted or partially transmitted using Uu-RRC.

[0099] Other examples related to the above embodiments will be discussed below.

[0100] In some of the above embodiments, reference is made to a vehicle in connected mode (also referred to as mode 1 or mode 3 configuration) or in idle mode (also referred to as mode 2 or mode 4 configuration). However, the invention is not limited to V2V or V2X communication, but is also applicable to any device-to-device communication, such as non-vehicle mobile or fixed users performing sidelink communication via a PC5 interface. Furthermore, in such scenarios, the above-described aspects of the invention can be employed.

[0101] 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 vehicle or a combination thereof as a receiver.

[0102] According to embodiments, the receiver may include one or more of the following: a mobile or fixed terminal, an IoT device, a ground-based vehicle, an aircraft, a drone, a building, or any other item or device (such as a sensor or actuator) providing a network connection that enables the item / device to communicate using a wireless communication system. According to embodiments, the transmitter may include one or more of the following: a macrocell base station, or a small cell base station, or a spaceborne aircraft (such as a satellite or space), or an airborne aircraft (such as an unmanned aerial vehicle system (UAS), for example, a tethered UAS, a lighter-than-air UAS (LTA), a heavier-than-air UAS (HTA), and a high-altitude UAS platform (HAP)), or any transmit / receive point (TRP) that enables an item or device with a network connection to communicate using a wireless communication system.

[0103] Note that the above embodiments are applicable to vehicular communication systems, such as V2X in the context of cellular (e.g., 3G, 4G, 5G or future) or ad-hoc communication networks.

[0104] Although some aspects of the concept have been described in the context of the apparatus, it is clear that these aspects also 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 method steps also represent a description of the features of the corresponding block or item or the corresponding apparatus.

[0105] 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 8An 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.

[0106] 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 auxiliary memory 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 the 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).

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] Therefore, another embodiment of the method of the present invention is a data carrier (or digital storage medium or computer-readable medium) on which a computer program is recorded, the computer program being used to perform one of the methods described herein. Therefore, another embodiment of the method of the present invention is a data stream or signal sequence representing a computer program being used to perform one of the methods described herein. The data stream or signal sequence may, for example, be configured to be transmitted via a data communication connection (e.g., via the Internet). Another embodiment includes a processing device, such as a computer or programmable logic device, configured or adapted to perform one of the methods described herein. Another embodiment includes a computer on which a computer program is installed, the computer program being used to perform one of the methods described herein.

[0112] 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.

[0113] 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 explanation of the embodiments herein.

[0114] List of acronyms and symbols

Claims

1. A wireless communication system, comprising: Multiple user equipment (UEs) (202, 204, 206, 208, 210), wherein the multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of the packet, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the packet. The transmission of the packet utilizes more than one data transmission resource location (DRR) within a single sidelink frame, such that the transmitting UE transmits the packet or one or more versions of the packet in multiple RDRs across one or more subsequent sidelink frames, or in multiple RDRs across a first sidelink frame and one or more subsequent sidelink frames. Specifically, the transmitting UE, which transmits data in the data area, uses the first sidelink frame to transmit information of the first control area, and repeatedly transmits the information of the first control area transmitted using the first sidelink frame in the first control area in subsequent sidelink frames of the first sidelink frame.

2. The wireless communication system according to claim 1, wherein, The one or more subsequent sidelink frames are located in consecutive or non-consecutive sidelink frames; or Specifically, between two subsequent sidelink frames used for the sidelink transmission, it is possible to either not arrange additional sidelink frames for use by other UEs (202, 204, 206, 208, 210), or arrange one or more additional sidelink frames for use by other UEs (202, 204, 206, 208, 210).

3. The wireless communication system according to claim 1, wherein, The information in the first control region and the second control region is transmitted using the same sidelink frame, or the information in the first control region and the second control region, together with a portion of the data transmission or the data transmission of the first version, is transmitted using the same sidelink frame.

4. The wireless communication system according to claim 1, wherein, The first control region (10c1) includes: information on resource reservation, or information pointing to a second control region (10c2) arranged in the same side link frame and the second control region (10c2) in each of the one or more subsequent side link frames (t1 to t6).

5. The wireless communication system according to claim 1, wherein, The first control region in one or more of the following one-to-one sidelink frames is idle or will be used by other UEs (202, 204, 206, 208, 210) or the plurality of UEs (202, 204, 206, 208, 210).

6. The wireless communication system according to claim 1, wherein the information of the repeatedly transmitted first control region includes information pointing to a second control region (10c2) in one or more subsequent sidelink frames.

7. The wireless communication system according to claim 1, wherein, The information in the second control region (10c2) of the one or more subsequent sidelink frames includes information about the data transmission resource location of the corresponding sidelink frame or information about multiple data transmission resource locations.

8. The wireless communication system according to claim 1, wherein, The second control region (10c2) is transmitted using subsequent sidelink frames of the first sidelink frame.

9. The wireless communication system according to claim 8, wherein, The first control region (10c1) includes: information on resource reservation, or information pointing to the second control region (10c2) in the corresponding side link frame or subsequent side link frames (t1 to t6).

10. The wireless communication system according to claim 8, wherein, The second control region (10c2) belonging to the following sidelink frames (t1 to t6) is idle or will be used by other UEs (202, 204, 206, 208, 210) or the plurality of UEs (202, 204, 206, 208, 210): the first control region (10c1) is transmitted within the sidelink frames (t1 to t6).

11. The wireless communication system according to claim 8, wherein, Each of the one or more subsequent sidelink frames includes a corresponding second control region; and / or The corresponding second control region of one or more subsequent sidelink frames includes information pointing to the data region (12d) within the corresponding sidelink frame.

12. The wireless communication system according to claim 1, wherein, The first control region includes: information about the destination ID of the RX UE; and / or information about the number of data transmission resource locations; and / or the number of sidelink frames (t1 to t6) for multiple data transmission resource locations; and / or information pointing to the corresponding second control region using subsequent sidelink frames (t1 to t6).

13. A wireless communication system, comprising: Multiple user equipment (UEs) (202, 204, 206, 208, 210), wherein the multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of data packets, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the data packets. Control information belonging to the first control region (10c1) is transmitted within the control region, while control information belonging to the second control region (10c2) is transmitted or partially transmitted using PC5-RRC configuration.

14. The wireless communication system according to claim 13, wherein, Control information belonging to the second control region (10c2) is transmitted as a part of the second control region (10c2) of the control region (10c).

15. The wireless communication system according to claim 13, wherein, The first control region (10c1) is transmitted either by using any sidelink frame in the sidelink frames preceding the sidelink frames for the packet data region (12d) or together with the sidelink transmission of the packet.

16. The wireless communication system according to claim 13, wherein, The second control region (10c2) uses one or more subsequent time-side link frames for transmission.

17. The wireless communication system according to claim 16, wherein, The size of the second control area (10c2) used for transmission gradually decreases; or Specifically, the amount of control information belonging to the second control region (10c2) and transmitted using the second control region (10c2) decreases, while the amount of control information belonging to the second control region (10c2) and transmitted using the PC5-RRC configuration increases; or the amount of control information belonging to the second control region (10c2) and transmitted using the second control region (10c2) increases, while the amount of control information belonging to the second control region (10c2) and transmitted using the PC5-RRC configuration decreases.

18. The wireless communication system according to claim 13, wherein, The second control region (10c2) is transmitted using a sidelink frame before the sidelink frame used for the sidelink transmission of the packet or together with the sidelink transmission of the packet.

19. The wireless communication system according to claim 13, wherein, The first control area (10c1) includes information pointing to the second control area (10c2) or information belonging to or partially transmitted using PC5-RRC configuration; and / or The information belonging to the second control area (10c2) transmitted or partially transmitted as the control area includes information pointing to the following: the second control area (10c2) of the subsequent side link frame or information belonging to the second control area (10c2) transmitted or partially transmitted using PC5-RRC configuration.

20. The wireless communication system according to claim 13, wherein, The packet transmission uses more than one data transmission resource location in a single sidelink frame, and / or wherein the packet will be transmitted in multiple data transmission resource locations across one or more subsequent sidelink frames, or wherein multiple versions of the packet will be transmitted in multiple data transmission resource locations across one or more subsequent sidelink frames.

21. The wireless communication system according to claim 13, wherein, The control information is control information to be transmitted by one or more base stations (gNBs).

22. The wireless communication system according to claim 21, wherein, Information belonging to the second control area is transmitted via RRC configuration on the UU link instead of RRC configuration on the PC5 link.

23. The wireless communication system according to claim 1 or claim 13 further includes one or more base stations (gNBs).

24. The wireless communication system according to claim 1 or claim 13, wherein, The UE includes one or more of the following: Mobile terminal, or Fixed terminal, or Cellular IoT-UE, or Automotive UE, or IoT or Narrowband IoT (NBIoT) devices, or Ground base station vehicles, or aircraft, or drones, or Mobile base stations, or Roadside units, or Buildings, or Any other article or device that provides a network connection enabling the article / device to communicate using a wireless communication network, and Base stations include one or more of the following: Macro cell base station, or Small cell base station, or The central unit of the base station, or The distributed unit of the base station, or Roadside units, or UE, or Remote wireless head, or AMF, or SMF, or Core network unit, or Network slicing in the NR or 5G core context, or Any Transmit / Receive Point (TRP) enables an article or device to communicate using a wireless communication network, wherein the article or device provides a network connection for communicating using the wireless communication network.

25. The wireless communication system according to claim 1 or claim 13, wherein, The sidelink frames (t1 to t6) include transmission time intervals, which are intervals for reserved resources of the device, such as sidelink subframes, TTIs, time slots, and / or mini-time slots.

26. A user equipment (UE) for a wireless communication system, the wireless communication system having multiple user equipments (UEs) (202, 204, 206, 208, 210), wherein the multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). in, Sidelink communication (PC5) consists of one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of the packet, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the packet. The packet transmission utilizes more than one data transmission resource location (DRR) within a single sidelink frame, enabling the UE to transmit the packet or one or more versions of the packet across multiple RDRs spanning one or more subsequent sidelink frames, or across multiple RDRs spanning a first sidelink frame and one or more subsequent sidelink frames. Specifically, the UE transmitting in the data area uses the first sidelink frame to transmit information of the first control area, and repeatedly transmits the information of the first control area transmitted using the first sidelink frame in the first control area in subsequent sidelink frames of the first sidelink frame.

27. A user equipment (UE) for a wireless communication system, the wireless communication system having multiple user equipments (UEs) (202, 204, 206, 208, 210), wherein, The multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of data packets, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the data packets. Control information belonging to the first control region (10c1) is transmitted within the control region as the first control region (10c1), while control information belonging to the second control region (10c2) is transmitted or partially transmitted using PC5-RRC configuration.

28. A base station for a wireless communication system, the wireless communication system having one or more base stations (gNBs) and multiple user equipment (UEs) (202, 204, 206, 208, 210), wherein, The multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of the packet, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the packet. The transmission of the packet utilizes more than one data transmission resource location (DRR) within a single sidelink frame, such that the transmitting UE transmits the packet or one or more versions of the packet in multiple RDRs across one or more subsequent sidelink frames, or in multiple RDRs across a first sidelink frame and one or more subsequent sidelink frames. Specifically, the transmitting UE, which transmits data in the data area, uses the first sidelink frame to transmit information of the first control area, and repeatedly transmits the information of the first control area transmitted using the first sidelink frame in the first control area in subsequent sidelink frames of the first sidelink frame.

29. A base station for a wireless communication system, the wireless communication system having one or more base stations (gNBs) and multiple user equipment (UEs) (202, 204, 206, 208, 210), wherein, The multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of data packets, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the data packets. Control information belonging to the first control region (10c1) is transmitted within the control region as the first control region (10c1), while control information belonging to the second control region (10c2) is transmitted or partially transmitted using PC5-RRC configuration.

30. A method for sidelink communication (PC5) in a wireless communication system having multiple user equipments (UEs) (202, 204, 206, 208, 210), wherein, The multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of the packet, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the packet. The transmission of the packet utilizes more than one data transmission resource location (DRR) within a single sidelink frame, such that the transmitting UE transmits the packet or one or more versions of the packet in multiple RDRs across one or more subsequent sidelink frames, or in multiple RDRs across a first sidelink frame and one or more subsequent sidelink frames. Specifically, the transmitting UE that transmits in the data area uses the first sidelink frame to transmit information of the first control area, and repeatedly transmits the information of the first control area transmitted using the first sidelink frame in the first control area in subsequent sidelink frames of the first sidelink frame.

31. A method for sidelink communication (PC5) in a wireless communication system having multiple user equipment (UE) devices (202, 204, 206, 208, 210), wherein, The multiple UEs (202, 204, 206, 208, 210) are configured for sidelink communication (PC5). The sidelink communication (PC5) includes one or more sidelink frames (t1 to t6), each sidelink frame having a control area (10c) and a data area (12d). The control region includes a first control region (10c1) and a second control region (10c2). The first control region (10c1) includes basic information about the sidelink transmission of data packets, and the second control region (10c2) includes information about the data transmission resource location or multiple data transmission resource locations of the data packets. Control information belonging to the first control region (10c1) is transmitted within the control region as the first control region (10c1), while control information belonging to the second control region (10c2) is transmitted or partially transmitted using PC5-RRC configuration.

32. A non-transitory storage computer program product comprising a computer-readable digital storage medium storing instructions that, when executed on a computer, perform the method according to claim 30 or claim 31.

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